From 08d8290f1d65a254b6794f7fe87a6f769b2ca792 Mon Sep 17 00:00:00 2001 From: "dependabot-preview[bot]" <27856297+dependabot-preview[bot]@users.noreply.github.com> Date: Tue, 9 Feb 2021 09:17:50 +0000 Subject: Bump github.com/containers/ocicrypt from 1.0.3 to 1.1.0 Bumps [github.com/containers/ocicrypt](https://github.com/containers/ocicrypt) from 1.0.3 to 1.1.0. - [Release notes](https://github.com/containers/ocicrypt/releases) - [Commits](https://github.com/containers/ocicrypt/compare/v1.0.3...v1.1.0) Signed-off-by: dependabot-preview[bot] Signed-off-by: Daniel J Walsh --- vendor/google.golang.org/grpc/.travis.yml | 42 + vendor/google.golang.org/grpc/CODE-OF-CONDUCT.md | 3 + vendor/google.golang.org/grpc/CONTRIBUTING.md | 61 + vendor/google.golang.org/grpc/GOVERNANCE.md | 1 + vendor/google.golang.org/grpc/MAINTAINERS.md | 27 + vendor/google.golang.org/grpc/Makefile | 64 + vendor/google.golang.org/grpc/README.md | 141 ++ .../grpc/attributes/attributes.go | 79 + vendor/google.golang.org/grpc/backoff.go | 61 + vendor/google.golang.org/grpc/backoff/backoff.go | 52 + vendor/google.golang.org/grpc/balancer/balancer.go | 374 ++++ .../grpc/balancer/base/balancer.go | 237 +++ .../google.golang.org/grpc/balancer/base/base.go | 71 + .../grpc/balancer/grpclb/state/state.go | 51 + .../grpc/balancer/roundrobin/roundrobin.go | 83 + .../grpc/balancer_conn_wrappers.go | 246 +++ .../binarylog/grpc_binarylog_v1/binarylog.pb.go | 1187 +++++++++++++ vendor/google.golang.org/grpc/call.go | 74 + vendor/google.golang.org/grpc/clientconn.go | 1571 +++++++++++++++++ vendor/google.golang.org/grpc/codec.go | 50 + vendor/google.golang.org/grpc/codegen.sh | 17 + vendor/google.golang.org/grpc/codes/codes.go | 46 + .../grpc/connectivity/connectivity.go | 63 + .../grpc/credentials/credentials.go | 289 ++++ vendor/google.golang.org/grpc/credentials/go12.go | 30 + vendor/google.golang.org/grpc/credentials/tls.go | 233 +++ vendor/google.golang.org/grpc/dialoptions.go | 638 +++++++ vendor/google.golang.org/grpc/doc.go | 26 + vendor/google.golang.org/grpc/encoding/encoding.go | 130 ++ .../google.golang.org/grpc/encoding/proto/proto.go | 110 ++ vendor/google.golang.org/grpc/go.mod | 17 + vendor/google.golang.org/grpc/go.sum | 84 + vendor/google.golang.org/grpc/grpclog/component.go | 117 ++ vendor/google.golang.org/grpc/grpclog/grpclog.go | 132 ++ vendor/google.golang.org/grpc/grpclog/logger.go | 87 + vendor/google.golang.org/grpc/grpclog/loggerv2.go | 221 +++ vendor/google.golang.org/grpc/install_gae.sh | 6 + vendor/google.golang.org/grpc/interceptor.go | 85 + .../grpc/internal/backoff/backoff.go | 73 + .../grpc/internal/balancerload/load.go | 46 + .../grpc/internal/binarylog/binarylog.go | 170 ++ .../grpc/internal/binarylog/binarylog_testutil.go | 42 + .../grpc/internal/binarylog/env_config.go | 208 +++ .../grpc/internal/binarylog/method_logger.go | 422 +++++ .../grpc/internal/binarylog/sink.go | 159 ++ .../grpc/internal/buffer/unbounded.go | 85 + .../grpc/internal/channelz/funcs.go | 737 ++++++++ .../grpc/internal/channelz/logging.go | 102 ++ .../grpc/internal/channelz/types.go | 701 ++++++++ .../grpc/internal/channelz/types_linux.go | 53 + .../grpc/internal/channelz/types_nonlinux.go | 42 + .../grpc/internal/channelz/util_linux.go | 39 + .../grpc/internal/channelz/util_nonlinux.go | 26 + .../grpc/internal/credentials/spiffe.go | 77 + .../grpc/internal/credentials/spiffe_appengine.go | 31 + .../grpc/internal/credentials/syscallconn.go | 60 + .../internal/credentials/syscallconn_appengine.go | 30 + .../grpc/internal/credentials/util.go | 50 + .../grpc/internal/envconfig/envconfig.go | 38 + .../grpc/internal/grpclog/grpclog.go | 126 ++ .../grpc/internal/grpclog/prefixLogger.go | 81 + .../grpc/internal/grpcrand/grpcrand.go | 56 + .../grpc/internal/grpcsync/event.go | 61 + .../grpc/internal/grpcutil/encode_duration.go | 63 + .../grpc/internal/grpcutil/metadata.go | 40 + .../grpc/internal/grpcutil/method.go | 84 + .../grpc/internal/grpcutil/target.go | 55 + vendor/google.golang.org/grpc/internal/internal.go | 81 + .../grpc/internal/resolver/dns/dns_resolver.go | 446 +++++ .../grpc/internal/resolver/dns/go113.go | 33 + .../internal/resolver/passthrough/passthrough.go | 57 + .../grpc/internal/serviceconfig/serviceconfig.go | 106 ++ .../grpc/internal/status/status.go | 23 +- .../grpc/internal/syscall/syscall_linux.go | 116 ++ .../grpc/internal/syscall/syscall_nonlinux.go | 76 + .../grpc/internal/transport/bdp_estimator.go | 141 ++ .../grpc/internal/transport/controlbuf.go | 942 +++++++++++ .../grpc/internal/transport/defaults.go | 49 + .../grpc/internal/transport/flowcontrol.go | 217 +++ .../grpc/internal/transport/handler_server.go | 463 +++++ .../grpc/internal/transport/http2_client.go | 1491 ++++++++++++++++ .../grpc/internal/transport/http2_server.go | 1268 ++++++++++++++ .../grpc/internal/transport/http_util.go | 600 +++++++ .../grpc/internal/transport/transport.go | 804 +++++++++ .../google.golang.org/grpc/keepalive/keepalive.go | 85 + vendor/google.golang.org/grpc/metadata/metadata.go | 209 +++ vendor/google.golang.org/grpc/peer/peer.go | 51 + vendor/google.golang.org/grpc/picker_wrapper.go | 177 ++ vendor/google.golang.org/grpc/pickfirst.go | 136 ++ vendor/google.golang.org/grpc/preloader.go | 67 + vendor/google.golang.org/grpc/proxy.go | 152 ++ vendor/google.golang.org/grpc/regenerate.sh | 139 ++ vendor/google.golang.org/grpc/resolver/resolver.go | 260 +++ .../grpc/resolver_conn_wrapper.go | 222 +++ vendor/google.golang.org/grpc/rpc_util.go | 938 +++++++++++ vendor/google.golang.org/grpc/server.go | 1780 ++++++++++++++++++++ vendor/google.golang.org/grpc/service_config.go | 454 +++++ .../grpc/serviceconfig/serviceconfig.go | 44 + vendor/google.golang.org/grpc/stats/handlers.go | 63 + vendor/google.golang.org/grpc/stats/stats.go | 312 ++++ vendor/google.golang.org/grpc/stream.go | 1551 +++++++++++++++++ vendor/google.golang.org/grpc/tap/tap.go | 56 + vendor/google.golang.org/grpc/trace.go | 123 ++ vendor/google.golang.org/grpc/version.go | 22 + vendor/google.golang.org/grpc/vet.sh | 220 +++ 105 files changed, 24526 insertions(+), 11 deletions(-) create mode 100644 vendor/google.golang.org/grpc/.travis.yml create mode 100644 vendor/google.golang.org/grpc/CODE-OF-CONDUCT.md create mode 100644 vendor/google.golang.org/grpc/CONTRIBUTING.md create mode 100644 vendor/google.golang.org/grpc/GOVERNANCE.md create mode 100644 vendor/google.golang.org/grpc/MAINTAINERS.md create mode 100644 vendor/google.golang.org/grpc/Makefile create mode 100644 vendor/google.golang.org/grpc/README.md create mode 100644 vendor/google.golang.org/grpc/attributes/attributes.go create mode 100644 vendor/google.golang.org/grpc/backoff.go create mode 100644 vendor/google.golang.org/grpc/backoff/backoff.go create mode 100644 vendor/google.golang.org/grpc/balancer/balancer.go create mode 100644 vendor/google.golang.org/grpc/balancer/base/balancer.go create mode 100644 vendor/google.golang.org/grpc/balancer/base/base.go create mode 100644 vendor/google.golang.org/grpc/balancer/grpclb/state/state.go create mode 100644 vendor/google.golang.org/grpc/balancer/roundrobin/roundrobin.go create mode 100644 vendor/google.golang.org/grpc/balancer_conn_wrappers.go create mode 100644 vendor/google.golang.org/grpc/binarylog/grpc_binarylog_v1/binarylog.pb.go create mode 100644 vendor/google.golang.org/grpc/call.go create mode 100644 vendor/google.golang.org/grpc/clientconn.go create mode 100644 vendor/google.golang.org/grpc/codec.go create mode 100644 vendor/google.golang.org/grpc/codegen.sh create mode 100644 vendor/google.golang.org/grpc/connectivity/connectivity.go create mode 100644 vendor/google.golang.org/grpc/credentials/credentials.go create mode 100644 vendor/google.golang.org/grpc/credentials/go12.go create mode 100644 vendor/google.golang.org/grpc/credentials/tls.go create mode 100644 vendor/google.golang.org/grpc/dialoptions.go create mode 100644 vendor/google.golang.org/grpc/doc.go create mode 100644 vendor/google.golang.org/grpc/encoding/encoding.go create mode 100644 vendor/google.golang.org/grpc/encoding/proto/proto.go create mode 100644 vendor/google.golang.org/grpc/go.mod create mode 100644 vendor/google.golang.org/grpc/go.sum create mode 100644 vendor/google.golang.org/grpc/grpclog/component.go create mode 100644 vendor/google.golang.org/grpc/grpclog/grpclog.go create mode 100644 vendor/google.golang.org/grpc/grpclog/logger.go create mode 100644 vendor/google.golang.org/grpc/grpclog/loggerv2.go create mode 100644 vendor/google.golang.org/grpc/install_gae.sh create mode 100644 vendor/google.golang.org/grpc/interceptor.go create mode 100644 vendor/google.golang.org/grpc/internal/backoff/backoff.go create mode 100644 vendor/google.golang.org/grpc/internal/balancerload/load.go create mode 100644 vendor/google.golang.org/grpc/internal/binarylog/binarylog.go create mode 100644 vendor/google.golang.org/grpc/internal/binarylog/binarylog_testutil.go create mode 100644 vendor/google.golang.org/grpc/internal/binarylog/env_config.go create mode 100644 vendor/google.golang.org/grpc/internal/binarylog/method_logger.go create mode 100644 vendor/google.golang.org/grpc/internal/binarylog/sink.go create mode 100644 vendor/google.golang.org/grpc/internal/buffer/unbounded.go create mode 100644 vendor/google.golang.org/grpc/internal/channelz/funcs.go create mode 100644 vendor/google.golang.org/grpc/internal/channelz/logging.go create mode 100644 vendor/google.golang.org/grpc/internal/channelz/types.go create mode 100644 vendor/google.golang.org/grpc/internal/channelz/types_linux.go create mode 100644 vendor/google.golang.org/grpc/internal/channelz/types_nonlinux.go create mode 100644 vendor/google.golang.org/grpc/internal/channelz/util_linux.go create mode 100644 vendor/google.golang.org/grpc/internal/channelz/util_nonlinux.go create mode 100644 vendor/google.golang.org/grpc/internal/credentials/spiffe.go create mode 100644 vendor/google.golang.org/grpc/internal/credentials/spiffe_appengine.go create mode 100644 vendor/google.golang.org/grpc/internal/credentials/syscallconn.go create mode 100644 vendor/google.golang.org/grpc/internal/credentials/syscallconn_appengine.go create mode 100644 vendor/google.golang.org/grpc/internal/credentials/util.go create mode 100644 vendor/google.golang.org/grpc/internal/envconfig/envconfig.go create mode 100644 vendor/google.golang.org/grpc/internal/grpclog/grpclog.go create mode 100644 vendor/google.golang.org/grpc/internal/grpclog/prefixLogger.go create mode 100644 vendor/google.golang.org/grpc/internal/grpcrand/grpcrand.go create mode 100644 vendor/google.golang.org/grpc/internal/grpcsync/event.go create mode 100644 vendor/google.golang.org/grpc/internal/grpcutil/encode_duration.go create mode 100644 vendor/google.golang.org/grpc/internal/grpcutil/metadata.go create mode 100644 vendor/google.golang.org/grpc/internal/grpcutil/method.go create mode 100644 vendor/google.golang.org/grpc/internal/grpcutil/target.go create mode 100644 vendor/google.golang.org/grpc/internal/internal.go create mode 100644 vendor/google.golang.org/grpc/internal/resolver/dns/dns_resolver.go create mode 100644 vendor/google.golang.org/grpc/internal/resolver/dns/go113.go create mode 100644 vendor/google.golang.org/grpc/internal/resolver/passthrough/passthrough.go create mode 100644 vendor/google.golang.org/grpc/internal/serviceconfig/serviceconfig.go create mode 100644 vendor/google.golang.org/grpc/internal/syscall/syscall_linux.go create mode 100644 vendor/google.golang.org/grpc/internal/syscall/syscall_nonlinux.go create mode 100644 vendor/google.golang.org/grpc/internal/transport/bdp_estimator.go create mode 100644 vendor/google.golang.org/grpc/internal/transport/controlbuf.go create mode 100644 vendor/google.golang.org/grpc/internal/transport/defaults.go create mode 100644 vendor/google.golang.org/grpc/internal/transport/flowcontrol.go create mode 100644 vendor/google.golang.org/grpc/internal/transport/handler_server.go create mode 100644 vendor/google.golang.org/grpc/internal/transport/http2_client.go create mode 100644 vendor/google.golang.org/grpc/internal/transport/http2_server.go create mode 100644 vendor/google.golang.org/grpc/internal/transport/http_util.go create mode 100644 vendor/google.golang.org/grpc/internal/transport/transport.go create mode 100644 vendor/google.golang.org/grpc/keepalive/keepalive.go create mode 100644 vendor/google.golang.org/grpc/metadata/metadata.go create mode 100644 vendor/google.golang.org/grpc/peer/peer.go create mode 100644 vendor/google.golang.org/grpc/picker_wrapper.go create mode 100644 vendor/google.golang.org/grpc/pickfirst.go create mode 100644 vendor/google.golang.org/grpc/preloader.go create mode 100644 vendor/google.golang.org/grpc/proxy.go create mode 100644 vendor/google.golang.org/grpc/regenerate.sh create mode 100644 vendor/google.golang.org/grpc/resolver/resolver.go create mode 100644 vendor/google.golang.org/grpc/resolver_conn_wrapper.go create mode 100644 vendor/google.golang.org/grpc/rpc_util.go create mode 100644 vendor/google.golang.org/grpc/server.go create mode 100644 vendor/google.golang.org/grpc/service_config.go create mode 100644 vendor/google.golang.org/grpc/serviceconfig/serviceconfig.go create mode 100644 vendor/google.golang.org/grpc/stats/handlers.go create mode 100644 vendor/google.golang.org/grpc/stats/stats.go create mode 100644 vendor/google.golang.org/grpc/stream.go create mode 100644 vendor/google.golang.org/grpc/tap/tap.go create mode 100644 vendor/google.golang.org/grpc/trace.go create mode 100644 vendor/google.golang.org/grpc/version.go create mode 100644 vendor/google.golang.org/grpc/vet.sh (limited to 'vendor/google.golang.org/grpc') diff --git a/vendor/google.golang.org/grpc/.travis.yml b/vendor/google.golang.org/grpc/.travis.yml new file mode 100644 index 000000000..3e495fa23 --- /dev/null +++ b/vendor/google.golang.org/grpc/.travis.yml @@ -0,0 +1,42 @@ +language: go + +matrix: + include: + - go: 1.14.x + env: VET=1 GO111MODULE=on + - go: 1.14.x + env: RACE=1 GO111MODULE=on + - go: 1.14.x + env: RUN386=1 + - go: 1.14.x + env: GRPC_GO_RETRY=on + - go: 1.14.x + env: TESTEXTRAS=1 + - go: 1.13.x + env: GO111MODULE=on + - go: 1.12.x + env: GO111MODULE=on + - go: 1.11.x # Keep until interop tests no longer require Go1.11 + env: GO111MODULE=on + +go_import_path: google.golang.org/grpc + +before_install: + - if [[ "${GO111MODULE}" = "on" ]]; then mkdir "${HOME}/go"; export GOPATH="${HOME}/go"; fi + - if [[ -n "${RUN386}" ]]; then export GOARCH=386; fi + - if [[ "${TRAVIS_EVENT_TYPE}" = "cron" && -z "${RUN386}" ]]; then RACE=1; fi + - if [[ "${TRAVIS_EVENT_TYPE}" != "cron" ]]; then export VET_SKIP_PROTO=1; fi + +install: + - try3() { eval "$*" || eval "$*" || eval "$*"; } + - try3 'if [[ "${GO111MODULE}" = "on" ]]; then go mod download; else make testdeps; fi' + - if [[ -n "${GAE}" ]]; then source ./install_gae.sh; make testappenginedeps; fi + - if [[ -n "${VET}" ]]; then ./vet.sh -install; fi + +script: + - set -e + - if [[ -n "${TESTEXTRAS}" ]]; then examples/examples_test.sh; interop/interop_test.sh; make testsubmodule; exit 0; fi + - if [[ -n "${VET}" ]]; then ./vet.sh; fi + - if [[ -n "${GAE}" ]]; then make testappengine; exit 0; fi + - if [[ -n "${RACE}" ]]; then make testrace; exit 0; fi + - make test diff --git a/vendor/google.golang.org/grpc/CODE-OF-CONDUCT.md b/vendor/google.golang.org/grpc/CODE-OF-CONDUCT.md new file mode 100644 index 000000000..9d4213ebc --- /dev/null +++ b/vendor/google.golang.org/grpc/CODE-OF-CONDUCT.md @@ -0,0 +1,3 @@ +## Community Code of Conduct + +gRPC follows the [CNCF Code of Conduct](https://github.com/cncf/foundation/blob/master/code-of-conduct.md). diff --git a/vendor/google.golang.org/grpc/CONTRIBUTING.md b/vendor/google.golang.org/grpc/CONTRIBUTING.md new file mode 100644 index 000000000..cd03f8c76 --- /dev/null +++ b/vendor/google.golang.org/grpc/CONTRIBUTING.md @@ -0,0 +1,61 @@ +# How to contribute + +We definitely welcome your patches and contributions to gRPC! Please read the gRPC +organization's [governance rules](https://github.com/grpc/grpc-community/blob/master/governance.md) +and [contribution guidelines](https://github.com/grpc/grpc-community/blob/master/CONTRIBUTING.md) before proceeding. + +If you are new to github, please start by reading [Pull Request howto](https://help.github.com/articles/about-pull-requests/) + +## Legal requirements + +In order to protect both you and ourselves, you will need to sign the +[Contributor License Agreement](https://identity.linuxfoundation.org/projects/cncf). + +## Guidelines for Pull Requests +How to get your contributions merged smoothly and quickly. + +- Create **small PRs** that are narrowly focused on **addressing a single + concern**. We often times receive PRs that are trying to fix several things at + a time, but only one fix is considered acceptable, nothing gets merged and + both author's & review's time is wasted. Create more PRs to address different + concerns and everyone will be happy. + +- The grpc package should only depend on standard Go packages and a small number + of exceptions. If your contribution introduces new dependencies which are NOT + in the [list](https://godoc.org/google.golang.org/grpc?imports), you need a + discussion with gRPC-Go authors and consultants. + +- For speculative changes, consider opening an issue and discussing it first. If + you are suggesting a behavioral or API change, consider starting with a [gRFC + proposal](https://github.com/grpc/proposal). + +- Provide a good **PR description** as a record of **what** change is being made + and **why** it was made. Link to a github issue if it exists. + +- Don't fix code style and formatting unless you are already changing that line + to address an issue. PRs with irrelevant changes won't be merged. If you do + want to fix formatting or style, do that in a separate PR. + +- Unless your PR is trivial, you should expect there will be reviewer comments + that you'll need to address before merging. We expect you to be reasonably + responsive to those comments, otherwise the PR will be closed after 2-3 weeks + of inactivity. + +- Maintain **clean commit history** and use **meaningful commit messages**. PRs + with messy commit history are difficult to review and won't be merged. Use + `rebase -i upstream/master` to curate your commit history and/or to bring in + latest changes from master (but avoid rebasing in the middle of a code + review). + +- Keep your PR up to date with upstream/master (if there are merge conflicts, we + can't really merge your change). + +- **All tests need to be passing** before your change can be merged. We + recommend you **run tests locally** before creating your PR to catch breakages + early on. + - `make all` to test everything, OR + - `make vet` to catch vet errors + - `make test` to run the tests + - `make testrace` to run tests in race mode + +- Exceptions to the rules can be made if there's a compelling reason for doing so. diff --git a/vendor/google.golang.org/grpc/GOVERNANCE.md b/vendor/google.golang.org/grpc/GOVERNANCE.md new file mode 100644 index 000000000..d6ff26747 --- /dev/null +++ b/vendor/google.golang.org/grpc/GOVERNANCE.md @@ -0,0 +1 @@ +This repository is governed by the gRPC organization's [governance rules](https://github.com/grpc/grpc-community/blob/master/governance.md). diff --git a/vendor/google.golang.org/grpc/MAINTAINERS.md b/vendor/google.golang.org/grpc/MAINTAINERS.md new file mode 100644 index 000000000..093c82b3a --- /dev/null +++ b/vendor/google.golang.org/grpc/MAINTAINERS.md @@ -0,0 +1,27 @@ +This page lists all active maintainers of this repository. If you were a +maintainer and would like to add your name to the Emeritus list, please send us a +PR. + +See [GOVERNANCE.md](https://github.com/grpc/grpc-community/blob/master/governance.md) +for governance guidelines and how to become a maintainer. +See [CONTRIBUTING.md](https://github.com/grpc/grpc-community/blob/master/CONTRIBUTING.md) +for general contribution guidelines. + +## Maintainers (in alphabetical order) +- [canguler](https://github.com/canguler), Google LLC +- [cesarghali](https://github.com/cesarghali), Google LLC +- [dfawley](https://github.com/dfawley), Google LLC +- [easwars](https://github.com/easwars), Google LLC +- [jadekler](https://github.com/jadekler), Google LLC +- [menghanl](https://github.com/menghanl), Google LLC +- [srini100](https://github.com/srini100), Google LLC + +## Emeritus Maintainers (in alphabetical order) +- [adelez](https://github.com/adelez), Google LLC +- [iamqizhao](https://github.com/iamqizhao), Google LLC +- [jtattermusch](https://github.com/jtattermusch), Google LLC +- [lyuxuan](https://github.com/lyuxuan), Google LLC +- [makmukhi](https://github.com/makmukhi), Google LLC +- [matt-kwong](https://github.com/matt-kwong), Google LLC +- [nicolasnoble](https://github.com/nicolasnoble), Google LLC +- [yongni](https://github.com/yongni), Google LLC diff --git a/vendor/google.golang.org/grpc/Makefile b/vendor/google.golang.org/grpc/Makefile new file mode 100644 index 000000000..3f661a787 --- /dev/null +++ b/vendor/google.golang.org/grpc/Makefile @@ -0,0 +1,64 @@ +all: vet test testrace + +build: deps + go build google.golang.org/grpc/... + +clean: + go clean -i google.golang.org/grpc/... + +deps: + go get -d -v google.golang.org/grpc/... + +proto: + @ if ! which protoc > /dev/null; then \ + echo "error: protoc not installed" >&2; \ + exit 1; \ + fi + go generate google.golang.org/grpc/... + +test: testdeps + go test -cpu 1,4 -timeout 7m google.golang.org/grpc/... + +testsubmodule: testdeps + cd security/advancedtls && go test -cpu 1,4 -timeout 7m google.golang.org/grpc/security/advancedtls/... + cd security/authorization && go test -cpu 1,4 -timeout 7m google.golang.org/grpc/security/authorization/... + +testappengine: testappenginedeps + goapp test -cpu 1,4 -timeout 7m google.golang.org/grpc/... + +testappenginedeps: + goapp get -d -v -t -tags 'appengine appenginevm' google.golang.org/grpc/... + +testdeps: + go get -d -v -t google.golang.org/grpc/... + +testrace: testdeps + go test -race -cpu 1,4 -timeout 7m google.golang.org/grpc/... + +updatedeps: + go get -d -v -u -f google.golang.org/grpc/... + +updatetestdeps: + go get -d -v -t -u -f google.golang.org/grpc/... + +vet: vetdeps + ./vet.sh + +vetdeps: + ./vet.sh -install + +.PHONY: \ + all \ + build \ + clean \ + deps \ + proto \ + test \ + testappengine \ + testappenginedeps \ + testdeps \ + testrace \ + updatedeps \ + updatetestdeps \ + vet \ + vetdeps diff --git a/vendor/google.golang.org/grpc/README.md b/vendor/google.golang.org/grpc/README.md new file mode 100644 index 000000000..3949a683f --- /dev/null +++ b/vendor/google.golang.org/grpc/README.md @@ -0,0 +1,141 @@ +# gRPC-Go + +[![Build Status](https://travis-ci.org/grpc/grpc-go.svg)](https://travis-ci.org/grpc/grpc-go) +[![GoDoc](https://pkg.go.dev/badge/google.golang.org/grpc)][API] +[![GoReportCard](https://goreportcard.com/badge/grpc/grpc-go)](https://goreportcard.com/report/github.com/grpc/grpc-go) + +The [Go][] implementation of [gRPC][]: A high performance, open source, general +RPC framework that puts mobile and HTTP/2 first. For more information see the +[Go gRPC docs][], or jump directly into the [quick start][]. + +## Prerequisites + +- **[Go][]**: any one of the **three latest major** [releases][go-releases]. + +## Installation + +With [Go module][] support (Go 1.11+), simply add the following import + +```go +import "google.golang.org/grpc" +``` + +to your code, and then `go [build|run|test]` will automatically fetch the +necessary dependencies. + +Otherwise, to install the `grpc-go` package, run the following command: + +```console +$ go get -u google.golang.org/grpc +``` + +> **Note:** If you are trying to access `grpc-go` from **China**, see the +> [FAQ](#FAQ) below. + +## Learn more + +- [Go gRPC docs][], which include a [quick start][] and [API + reference][API] among other resources +- [Low-level technical docs](Documentation) from this repository +- [Performance benchmark][] +- [Examples](examples) + +## FAQ + +### I/O Timeout Errors + +The `golang.org` domain may be blocked from some countries. `go get` usually +produces an error like the following when this happens: + +```console +$ go get -u google.golang.org/grpc +package google.golang.org/grpc: unrecognized import path "google.golang.org/grpc" (https fetch: Get https://google.golang.org/grpc?go-get=1: dial tcp 216.239.37.1:443: i/o timeout) +``` + +To build Go code, there are several options: + +- Set up a VPN and access google.golang.org through that. + +- Without Go module support: `git clone` the repo manually: + + ```sh + git clone https://github.com/grpc/grpc-go.git $GOPATH/src/google.golang.org/grpc + ``` + + You will need to do the same for all of grpc's dependencies in `golang.org`, + e.g. `golang.org/x/net`. + +- With Go module support: it is possible to use the `replace` feature of `go + mod` to create aliases for golang.org packages. In your project's directory: + + ```sh + go mod edit -replace=google.golang.org/grpc=github.com/grpc/grpc-go@latest + go mod tidy + go mod vendor + go build -mod=vendor + ``` + + Again, this will need to be done for all transitive dependencies hosted on + golang.org as well. For details, refer to [golang/go issue #28652](https://github.com/golang/go/issues/28652). + +### Compiling error, undefined: grpc.SupportPackageIsVersion + +#### If you are using Go modules: + +Ensure your gRPC-Go version is `require`d at the appropriate version in +the same module containing the generated `.pb.go` files. For example, +`SupportPackageIsVersion6` needs `v1.27.0`, so in your `go.mod` file: + +```go +module + +require ( + google.golang.org/grpc v1.27.0 +) +``` + +#### If you are *not* using Go modules: + +Update the `proto` package, gRPC package, and rebuild the `.proto` files: + +```sh +go get -u github.com/golang/protobuf/{proto,protoc-gen-go} +go get -u google.golang.org/grpc +protoc --go_out=plugins=grpc:. *.proto +``` + +### How to turn on logging + +The default logger is controlled by environment variables. Turn everything on +like this: + +```console +$ export GRPC_GO_LOG_VERBOSITY_LEVEL=99 +$ export GRPC_GO_LOG_SEVERITY_LEVEL=info +``` + +### The RPC failed with error `"code = Unavailable desc = transport is closing"` + +This error means the connection the RPC is using was closed, and there are many +possible reasons, including: + 1. mis-configured transport credentials, connection failed on handshaking + 1. bytes disrupted, possibly by a proxy in between + 1. server shutdown + 1. Keepalive parameters caused connection shutdown, for example if you have configured + your server to terminate connections regularly to [trigger DNS lookups](https://github.com/grpc/grpc-go/issues/3170#issuecomment-552517779). + If this is the case, you may want to increase your [MaxConnectionAgeGrace](https://pkg.go.dev/google.golang.org/grpc/keepalive?tab=doc#ServerParameters), + to allow longer RPC calls to finish. + +It can be tricky to debug this because the error happens on the client side but +the root cause of the connection being closed is on the server side. Turn on +logging on __both client and server__, and see if there are any transport +errors. + +[API]: https://pkg.go.dev/google.golang.org/grpc +[Go]: https://golang.org +[Go module]: https://github.com/golang/go/wiki/Modules +[gRPC]: https://grpc.io +[Go gRPC docs]: https://grpc.io/docs/languages/go +[Performance benchmark]: https://performance-dot-grpc-testing.appspot.com/explore?dashboard=5652536396611584&widget=490377658&container=1286539696 +[quick start]: https://grpc.io/docs/languages/go/quickstart +[go-releases]: https://golang.org/doc/devel/release.html diff --git a/vendor/google.golang.org/grpc/attributes/attributes.go b/vendor/google.golang.org/grpc/attributes/attributes.go new file mode 100644 index 000000000..3220d87be --- /dev/null +++ b/vendor/google.golang.org/grpc/attributes/attributes.go @@ -0,0 +1,79 @@ +/* + * + * Copyright 2019 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package attributes defines a generic key/value store used in various gRPC +// components. +// +// Experimental +// +// Notice: This package is EXPERIMENTAL and may be changed or removed in a +// later release. +package attributes + +import "fmt" + +// Attributes is an immutable struct for storing and retrieving generic +// key/value pairs. Keys must be hashable, and users should define their own +// types for keys. +type Attributes struct { + m map[interface{}]interface{} +} + +// New returns a new Attributes containing all key/value pairs in kvs. If the +// same key appears multiple times, the last value overwrites all previous +// values for that key. Panics if len(kvs) is not even. +func New(kvs ...interface{}) *Attributes { + if len(kvs)%2 != 0 { + panic(fmt.Sprintf("attributes.New called with unexpected input: len(kvs) = %v", len(kvs))) + } + a := &Attributes{m: make(map[interface{}]interface{}, len(kvs)/2)} + for i := 0; i < len(kvs)/2; i++ { + a.m[kvs[i*2]] = kvs[i*2+1] + } + return a +} + +// WithValues returns a new Attributes containing all key/value pairs in a and +// kvs. Panics if len(kvs) is not even. If the same key appears multiple +// times, the last value overwrites all previous values for that key. To +// remove an existing key, use a nil value. +func (a *Attributes) WithValues(kvs ...interface{}) *Attributes { + if a == nil { + return New(kvs...) + } + if len(kvs)%2 != 0 { + panic(fmt.Sprintf("attributes.New called with unexpected input: len(kvs) = %v", len(kvs))) + } + n := &Attributes{m: make(map[interface{}]interface{}, len(a.m)+len(kvs)/2)} + for k, v := range a.m { + n.m[k] = v + } + for i := 0; i < len(kvs)/2; i++ { + n.m[kvs[i*2]] = kvs[i*2+1] + } + return n +} + +// Value returns the value associated with these attributes for key, or nil if +// no value is associated with key. +func (a *Attributes) Value(key interface{}) interface{} { + if a == nil { + return nil + } + return a.m[key] +} diff --git a/vendor/google.golang.org/grpc/backoff.go b/vendor/google.golang.org/grpc/backoff.go new file mode 100644 index 000000000..542594f5c --- /dev/null +++ b/vendor/google.golang.org/grpc/backoff.go @@ -0,0 +1,61 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// See internal/backoff package for the backoff implementation. This file is +// kept for the exported types and API backward compatibility. + +package grpc + +import ( + "time" + + "google.golang.org/grpc/backoff" +) + +// DefaultBackoffConfig uses values specified for backoff in +// https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md. +// +// Deprecated: use ConnectParams instead. Will be supported throughout 1.x. +var DefaultBackoffConfig = BackoffConfig{ + MaxDelay: 120 * time.Second, +} + +// BackoffConfig defines the parameters for the default gRPC backoff strategy. +// +// Deprecated: use ConnectParams instead. Will be supported throughout 1.x. +type BackoffConfig struct { + // MaxDelay is the upper bound of backoff delay. + MaxDelay time.Duration +} + +// ConnectParams defines the parameters for connecting and retrying. Users are +// encouraged to use this instead of the BackoffConfig type defined above. See +// here for more details: +// https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type ConnectParams struct { + // Backoff specifies the configuration options for connection backoff. + Backoff backoff.Config + // MinConnectTimeout is the minimum amount of time we are willing to give a + // connection to complete. + MinConnectTimeout time.Duration +} diff --git a/vendor/google.golang.org/grpc/backoff/backoff.go b/vendor/google.golang.org/grpc/backoff/backoff.go new file mode 100644 index 000000000..0787d0b50 --- /dev/null +++ b/vendor/google.golang.org/grpc/backoff/backoff.go @@ -0,0 +1,52 @@ +/* + * + * Copyright 2019 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package backoff provides configuration options for backoff. +// +// More details can be found at: +// https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md. +// +// All APIs in this package are experimental. +package backoff + +import "time" + +// Config defines the configuration options for backoff. +type Config struct { + // BaseDelay is the amount of time to backoff after the first failure. + BaseDelay time.Duration + // Multiplier is the factor with which to multiply backoffs after a + // failed retry. Should ideally be greater than 1. + Multiplier float64 + // Jitter is the factor with which backoffs are randomized. + Jitter float64 + // MaxDelay is the upper bound of backoff delay. + MaxDelay time.Duration +} + +// DefaultConfig is a backoff configuration with the default values specfied +// at https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md. +// +// This should be useful for callers who want to configure backoff with +// non-default values only for a subset of the options. +var DefaultConfig = Config{ + BaseDelay: 1.0 * time.Second, + Multiplier: 1.6, + Jitter: 0.2, + MaxDelay: 120 * time.Second, +} diff --git a/vendor/google.golang.org/grpc/balancer/balancer.go b/vendor/google.golang.org/grpc/balancer/balancer.go new file mode 100644 index 000000000..8bf359dbf --- /dev/null +++ b/vendor/google.golang.org/grpc/balancer/balancer.go @@ -0,0 +1,374 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package balancer defines APIs for load balancing in gRPC. +// All APIs in this package are experimental. +package balancer + +import ( + "context" + "encoding/json" + "errors" + "net" + "strings" + + "google.golang.org/grpc/connectivity" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/internal" + "google.golang.org/grpc/metadata" + "google.golang.org/grpc/resolver" + "google.golang.org/grpc/serviceconfig" +) + +var ( + // m is a map from name to balancer builder. + m = make(map[string]Builder) +) + +// Register registers the balancer builder to the balancer map. b.Name +// (lowercased) will be used as the name registered with this builder. If the +// Builder implements ConfigParser, ParseConfig will be called when new service +// configs are received by the resolver, and the result will be provided to the +// Balancer in UpdateClientConnState. +// +// NOTE: this function must only be called during initialization time (i.e. in +// an init() function), and is not thread-safe. If multiple Balancers are +// registered with the same name, the one registered last will take effect. +func Register(b Builder) { + m[strings.ToLower(b.Name())] = b +} + +// unregisterForTesting deletes the balancer with the given name from the +// balancer map. +// +// This function is not thread-safe. +func unregisterForTesting(name string) { + delete(m, name) +} + +func init() { + internal.BalancerUnregister = unregisterForTesting +} + +// Get returns the resolver builder registered with the given name. +// Note that the compare is done in a case-insensitive fashion. +// If no builder is register with the name, nil will be returned. +func Get(name string) Builder { + if b, ok := m[strings.ToLower(name)]; ok { + return b + } + return nil +} + +// SubConn represents a gRPC sub connection. +// Each sub connection contains a list of addresses. gRPC will +// try to connect to them (in sequence), and stop trying the +// remainder once one connection is successful. +// +// The reconnect backoff will be applied on the list, not a single address. +// For example, try_on_all_addresses -> backoff -> try_on_all_addresses. +// +// All SubConns start in IDLE, and will not try to connect. To trigger +// the connecting, Balancers must call Connect. +// When the connection encounters an error, it will reconnect immediately. +// When the connection becomes IDLE, it will not reconnect unless Connect is +// called. +// +// This interface is to be implemented by gRPC. Users should not need a +// brand new implementation of this interface. For the situations like +// testing, the new implementation should embed this interface. This allows +// gRPC to add new methods to this interface. +type SubConn interface { + // UpdateAddresses updates the addresses used in this SubConn. + // gRPC checks if currently-connected address is still in the new list. + // If it's in the list, the connection will be kept. + // If it's not in the list, the connection will gracefully closed, and + // a new connection will be created. + // + // This will trigger a state transition for the SubConn. + UpdateAddresses([]resolver.Address) + // Connect starts the connecting for this SubConn. + Connect() +} + +// NewSubConnOptions contains options to create new SubConn. +type NewSubConnOptions struct { + // CredsBundle is the credentials bundle that will be used in the created + // SubConn. If it's nil, the original creds from grpc DialOptions will be + // used. + // + // Deprecated: Use the Attributes field in resolver.Address to pass + // arbitrary data to the credential handshaker. + CredsBundle credentials.Bundle + // HealthCheckEnabled indicates whether health check service should be + // enabled on this SubConn + HealthCheckEnabled bool +} + +// State contains the balancer's state relevant to the gRPC ClientConn. +type State struct { + // State contains the connectivity state of the balancer, which is used to + // determine the state of the ClientConn. + ConnectivityState connectivity.State + // Picker is used to choose connections (SubConns) for RPCs. + Picker Picker +} + +// ClientConn represents a gRPC ClientConn. +// +// This interface is to be implemented by gRPC. Users should not need a +// brand new implementation of this interface. For the situations like +// testing, the new implementation should embed this interface. This allows +// gRPC to add new methods to this interface. +type ClientConn interface { + // NewSubConn is called by balancer to create a new SubConn. + // It doesn't block and wait for the connections to be established. + // Behaviors of the SubConn can be controlled by options. + NewSubConn([]resolver.Address, NewSubConnOptions) (SubConn, error) + // RemoveSubConn removes the SubConn from ClientConn. + // The SubConn will be shutdown. + RemoveSubConn(SubConn) + + // UpdateState notifies gRPC that the balancer's internal state has + // changed. + // + // gRPC will update the connectivity state of the ClientConn, and will call + // Pick on the new Picker to pick new SubConns. + UpdateState(State) + + // ResolveNow is called by balancer to notify gRPC to do a name resolving. + ResolveNow(resolver.ResolveNowOptions) + + // Target returns the dial target for this ClientConn. + // + // Deprecated: Use the Target field in the BuildOptions instead. + Target() string +} + +// BuildOptions contains additional information for Build. +type BuildOptions struct { + // DialCreds is the transport credential the Balancer implementation can + // use to dial to a remote load balancer server. The Balancer implementations + // can ignore this if it does not need to talk to another party securely. + DialCreds credentials.TransportCredentials + // CredsBundle is the credentials bundle that the Balancer can use. + CredsBundle credentials.Bundle + // Dialer is the custom dialer the Balancer implementation can use to dial + // to a remote load balancer server. The Balancer implementations + // can ignore this if it doesn't need to talk to remote balancer. + Dialer func(context.Context, string) (net.Conn, error) + // ChannelzParentID is the entity parent's channelz unique identification number. + ChannelzParentID int64 + // Target contains the parsed address info of the dial target. It is the same resolver.Target as + // passed to the resolver. + // See the documentation for the resolver.Target type for details about what it contains. + Target resolver.Target +} + +// Builder creates a balancer. +type Builder interface { + // Build creates a new balancer with the ClientConn. + Build(cc ClientConn, opts BuildOptions) Balancer + // Name returns the name of balancers built by this builder. + // It will be used to pick balancers (for example in service config). + Name() string +} + +// ConfigParser parses load balancer configs. +type ConfigParser interface { + // ParseConfig parses the JSON load balancer config provided into an + // internal form or returns an error if the config is invalid. For future + // compatibility reasons, unknown fields in the config should be ignored. + ParseConfig(LoadBalancingConfigJSON json.RawMessage) (serviceconfig.LoadBalancingConfig, error) +} + +// PickInfo contains additional information for the Pick operation. +type PickInfo struct { + // FullMethodName is the method name that NewClientStream() is called + // with. The canonical format is /service/Method. + FullMethodName string + // Ctx is the RPC's context, and may contain relevant RPC-level information + // like the outgoing header metadata. + Ctx context.Context +} + +// DoneInfo contains additional information for done. +type DoneInfo struct { + // Err is the rpc error the RPC finished with. It could be nil. + Err error + // Trailer contains the metadata from the RPC's trailer, if present. + Trailer metadata.MD + // BytesSent indicates if any bytes have been sent to the server. + BytesSent bool + // BytesReceived indicates if any byte has been received from the server. + BytesReceived bool + // ServerLoad is the load received from server. It's usually sent as part of + // trailing metadata. + // + // The only supported type now is *orca_v1.LoadReport. + ServerLoad interface{} +} + +var ( + // ErrNoSubConnAvailable indicates no SubConn is available for pick(). + // gRPC will block the RPC until a new picker is available via UpdateState(). + ErrNoSubConnAvailable = errors.New("no SubConn is available") + // ErrTransientFailure indicates all SubConns are in TransientFailure. + // WaitForReady RPCs will block, non-WaitForReady RPCs will fail. + // + // Deprecated: return an appropriate error based on the last resolution or + // connection attempt instead. The behavior is the same for any non-gRPC + // status error. + ErrTransientFailure = errors.New("all SubConns are in TransientFailure") +) + +// PickResult contains information related to a connection chosen for an RPC. +type PickResult struct { + // SubConn is the connection to use for this pick, if its state is Ready. + // If the state is not Ready, gRPC will block the RPC until a new Picker is + // provided by the balancer (using ClientConn.UpdateState). The SubConn + // must be one returned by ClientConn.NewSubConn. + SubConn SubConn + + // Done is called when the RPC is completed. If the SubConn is not ready, + // this will be called with a nil parameter. If the SubConn is not a valid + // type, Done may not be called. May be nil if the balancer does not wish + // to be notified when the RPC completes. + Done func(DoneInfo) +} + +// TransientFailureError returns e. It exists for backward compatibility and +// will be deleted soon. +// +// Deprecated: no longer necessary, picker errors are treated this way by +// default. +func TransientFailureError(e error) error { return e } + +// Picker is used by gRPC to pick a SubConn to send an RPC. +// Balancer is expected to generate a new picker from its snapshot every time its +// internal state has changed. +// +// The pickers used by gRPC can be updated by ClientConn.UpdateState(). +type Picker interface { + // Pick returns the connection to use for this RPC and related information. + // + // Pick should not block. If the balancer needs to do I/O or any blocking + // or time-consuming work to service this call, it should return + // ErrNoSubConnAvailable, and the Pick call will be repeated by gRPC when + // the Picker is updated (using ClientConn.UpdateState). + // + // If an error is returned: + // + // - If the error is ErrNoSubConnAvailable, gRPC will block until a new + // Picker is provided by the balancer (using ClientConn.UpdateState). + // + // - If the error is a status error (implemented by the grpc/status + // package), gRPC will terminate the RPC with the code and message + // provided. + // + // - For all other errors, wait for ready RPCs will wait, but non-wait for + // ready RPCs will be terminated with this error's Error() string and + // status code Unavailable. + Pick(info PickInfo) (PickResult, error) +} + +// Balancer takes input from gRPC, manages SubConns, and collects and aggregates +// the connectivity states. +// +// It also generates and updates the Picker used by gRPC to pick SubConns for RPCs. +// +// UpdateClientConnState, ResolverError, UpdateSubConnState, and Close are +// guaranteed to be called synchronously from the same goroutine. There's no +// guarantee on picker.Pick, it may be called anytime. +type Balancer interface { + // UpdateClientConnState is called by gRPC when the state of the ClientConn + // changes. If the error returned is ErrBadResolverState, the ClientConn + // will begin calling ResolveNow on the active name resolver with + // exponential backoff until a subsequent call to UpdateClientConnState + // returns a nil error. Any other errors are currently ignored. + UpdateClientConnState(ClientConnState) error + // ResolverError is called by gRPC when the name resolver reports an error. + ResolverError(error) + // UpdateSubConnState is called by gRPC when the state of a SubConn + // changes. + UpdateSubConnState(SubConn, SubConnState) + // Close closes the balancer. The balancer is not required to call + // ClientConn.RemoveSubConn for its existing SubConns. + Close() +} + +// SubConnState describes the state of a SubConn. +type SubConnState struct { + // ConnectivityState is the connectivity state of the SubConn. + ConnectivityState connectivity.State + // ConnectionError is set if the ConnectivityState is TransientFailure, + // describing the reason the SubConn failed. Otherwise, it is nil. + ConnectionError error +} + +// ClientConnState describes the state of a ClientConn relevant to the +// balancer. +type ClientConnState struct { + ResolverState resolver.State + // The parsed load balancing configuration returned by the builder's + // ParseConfig method, if implemented. + BalancerConfig serviceconfig.LoadBalancingConfig +} + +// ErrBadResolverState may be returned by UpdateClientConnState to indicate a +// problem with the provided name resolver data. +var ErrBadResolverState = errors.New("bad resolver state") + +// ConnectivityStateEvaluator takes the connectivity states of multiple SubConns +// and returns one aggregated connectivity state. +// +// It's not thread safe. +type ConnectivityStateEvaluator struct { + numReady uint64 // Number of addrConns in ready state. + numConnecting uint64 // Number of addrConns in connecting state. +} + +// RecordTransition records state change happening in subConn and based on that +// it evaluates what aggregated state should be. +// +// - If at least one SubConn in Ready, the aggregated state is Ready; +// - Else if at least one SubConn in Connecting, the aggregated state is Connecting; +// - Else the aggregated state is TransientFailure. +// +// Idle and Shutdown are not considered. +func (cse *ConnectivityStateEvaluator) RecordTransition(oldState, newState connectivity.State) connectivity.State { + // Update counters. + for idx, state := range []connectivity.State{oldState, newState} { + updateVal := 2*uint64(idx) - 1 // -1 for oldState and +1 for new. + switch state { + case connectivity.Ready: + cse.numReady += updateVal + case connectivity.Connecting: + cse.numConnecting += updateVal + } + } + + // Evaluate. + if cse.numReady > 0 { + return connectivity.Ready + } + if cse.numConnecting > 0 { + return connectivity.Connecting + } + return connectivity.TransientFailure +} diff --git a/vendor/google.golang.org/grpc/balancer/base/balancer.go b/vendor/google.golang.org/grpc/balancer/base/balancer.go new file mode 100644 index 000000000..32d782f1c --- /dev/null +++ b/vendor/google.golang.org/grpc/balancer/base/balancer.go @@ -0,0 +1,237 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package base + +import ( + "errors" + "fmt" + + "google.golang.org/grpc/balancer" + "google.golang.org/grpc/connectivity" + "google.golang.org/grpc/grpclog" + "google.golang.org/grpc/resolver" +) + +var logger = grpclog.Component("balancer") + +type baseBuilder struct { + name string + pickerBuilder PickerBuilder + config Config +} + +func (bb *baseBuilder) Build(cc balancer.ClientConn, opt balancer.BuildOptions) balancer.Balancer { + bal := &baseBalancer{ + cc: cc, + pickerBuilder: bb.pickerBuilder, + + subConns: make(map[resolver.Address]balancer.SubConn), + scStates: make(map[balancer.SubConn]connectivity.State), + csEvltr: &balancer.ConnectivityStateEvaluator{}, + config: bb.config, + } + // Initialize picker to a picker that always returns + // ErrNoSubConnAvailable, because when state of a SubConn changes, we + // may call UpdateState with this picker. + bal.picker = NewErrPicker(balancer.ErrNoSubConnAvailable) + return bal +} + +func (bb *baseBuilder) Name() string { + return bb.name +} + +type baseBalancer struct { + cc balancer.ClientConn + pickerBuilder PickerBuilder + + csEvltr *balancer.ConnectivityStateEvaluator + state connectivity.State + + subConns map[resolver.Address]balancer.SubConn + scStates map[balancer.SubConn]connectivity.State + picker balancer.Picker + config Config + + resolverErr error // the last error reported by the resolver; cleared on successful resolution + connErr error // the last connection error; cleared upon leaving TransientFailure +} + +func (b *baseBalancer) ResolverError(err error) { + b.resolverErr = err + if len(b.subConns) == 0 { + b.state = connectivity.TransientFailure + } + + if b.state != connectivity.TransientFailure { + // The picker will not change since the balancer does not currently + // report an error. + return + } + b.regeneratePicker() + b.cc.UpdateState(balancer.State{ + ConnectivityState: b.state, + Picker: b.picker, + }) +} + +func (b *baseBalancer) UpdateClientConnState(s balancer.ClientConnState) error { + // TODO: handle s.ResolverState.ServiceConfig? + if logger.V(2) { + logger.Info("base.baseBalancer: got new ClientConn state: ", s) + } + // Successful resolution; clear resolver error and ensure we return nil. + b.resolverErr = nil + // addrsSet is the set converted from addrs, it's used for quick lookup of an address. + addrsSet := make(map[resolver.Address]struct{}) + for _, a := range s.ResolverState.Addresses { + addrsSet[a] = struct{}{} + if _, ok := b.subConns[a]; !ok { + // a is a new address (not existing in b.subConns). + sc, err := b.cc.NewSubConn([]resolver.Address{a}, balancer.NewSubConnOptions{HealthCheckEnabled: b.config.HealthCheck}) + if err != nil { + logger.Warningf("base.baseBalancer: failed to create new SubConn: %v", err) + continue + } + b.subConns[a] = sc + b.scStates[sc] = connectivity.Idle + sc.Connect() + } + } + for a, sc := range b.subConns { + // a was removed by resolver. + if _, ok := addrsSet[a]; !ok { + b.cc.RemoveSubConn(sc) + delete(b.subConns, a) + // Keep the state of this sc in b.scStates until sc's state becomes Shutdown. + // The entry will be deleted in UpdateSubConnState. + } + } + // If resolver state contains no addresses, return an error so ClientConn + // will trigger re-resolve. Also records this as an resolver error, so when + // the overall state turns transient failure, the error message will have + // the zero address information. + if len(s.ResolverState.Addresses) == 0 { + b.ResolverError(errors.New("produced zero addresses")) + return balancer.ErrBadResolverState + } + return nil +} + +// mergeErrors builds an error from the last connection error and the last +// resolver error. Must only be called if b.state is TransientFailure. +func (b *baseBalancer) mergeErrors() error { + // connErr must always be non-nil unless there are no SubConns, in which + // case resolverErr must be non-nil. + if b.connErr == nil { + return fmt.Errorf("last resolver error: %v", b.resolverErr) + } + if b.resolverErr == nil { + return fmt.Errorf("last connection error: %v", b.connErr) + } + return fmt.Errorf("last connection error: %v; last resolver error: %v", b.connErr, b.resolverErr) +} + +// regeneratePicker takes a snapshot of the balancer, and generates a picker +// from it. The picker is +// - errPicker if the balancer is in TransientFailure, +// - built by the pickerBuilder with all READY SubConns otherwise. +func (b *baseBalancer) regeneratePicker() { + if b.state == connectivity.TransientFailure { + b.picker = NewErrPicker(b.mergeErrors()) + return + } + readySCs := make(map[balancer.SubConn]SubConnInfo) + + // Filter out all ready SCs from full subConn map. + for addr, sc := range b.subConns { + if st, ok := b.scStates[sc]; ok && st == connectivity.Ready { + readySCs[sc] = SubConnInfo{Address: addr} + } + } + b.picker = b.pickerBuilder.Build(PickerBuildInfo{ReadySCs: readySCs}) +} + +func (b *baseBalancer) UpdateSubConnState(sc balancer.SubConn, state balancer.SubConnState) { + s := state.ConnectivityState + if logger.V(2) { + logger.Infof("base.baseBalancer: handle SubConn state change: %p, %v", sc, s) + } + oldS, ok := b.scStates[sc] + if !ok { + if logger.V(2) { + logger.Infof("base.baseBalancer: got state changes for an unknown SubConn: %p, %v", sc, s) + } + return + } + if oldS == connectivity.TransientFailure && s == connectivity.Connecting { + // Once a subconn enters TRANSIENT_FAILURE, ignore subsequent + // CONNECTING transitions to prevent the aggregated state from being + // always CONNECTING when many backends exist but are all down. + return + } + b.scStates[sc] = s + switch s { + case connectivity.Idle: + sc.Connect() + case connectivity.Shutdown: + // When an address was removed by resolver, b called RemoveSubConn but + // kept the sc's state in scStates. Remove state for this sc here. + delete(b.scStates, sc) + case connectivity.TransientFailure: + // Save error to be reported via picker. + b.connErr = state.ConnectionError + } + + b.state = b.csEvltr.RecordTransition(oldS, s) + + // Regenerate picker when one of the following happens: + // - this sc entered or left ready + // - the aggregated state of balancer is TransientFailure + // (may need to update error message) + if (s == connectivity.Ready) != (oldS == connectivity.Ready) || + b.state == connectivity.TransientFailure { + b.regeneratePicker() + } + + b.cc.UpdateState(balancer.State{ConnectivityState: b.state, Picker: b.picker}) +} + +// Close is a nop because base balancer doesn't have internal state to clean up, +// and it doesn't need to call RemoveSubConn for the SubConns. +func (b *baseBalancer) Close() { +} + +// NewErrPicker returns a Picker that always returns err on Pick(). +func NewErrPicker(err error) balancer.Picker { + return &errPicker{err: err} +} + +// NewErrPickerV2 is temporarily defined for backward compatibility reasons. +// +// Deprecated: use NewErrPicker instead. +var NewErrPickerV2 = NewErrPicker + +type errPicker struct { + err error // Pick() always returns this err. +} + +func (p *errPicker) Pick(info balancer.PickInfo) (balancer.PickResult, error) { + return balancer.PickResult{}, p.err +} diff --git a/vendor/google.golang.org/grpc/balancer/base/base.go b/vendor/google.golang.org/grpc/balancer/base/base.go new file mode 100644 index 000000000..e31d76e33 --- /dev/null +++ b/vendor/google.golang.org/grpc/balancer/base/base.go @@ -0,0 +1,71 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package base defines a balancer base that can be used to build balancers with +// different picking algorithms. +// +// The base balancer creates a new SubConn for each resolved address. The +// provided picker will only be notified about READY SubConns. +// +// This package is the base of round_robin balancer, its purpose is to be used +// to build round_robin like balancers with complex picking algorithms. +// Balancers with more complicated logic should try to implement a balancer +// builder from scratch. +// +// All APIs in this package are experimental. +package base + +import ( + "google.golang.org/grpc/balancer" + "google.golang.org/grpc/resolver" +) + +// PickerBuilder creates balancer.Picker. +type PickerBuilder interface { + // Build returns a picker that will be used by gRPC to pick a SubConn. + Build(info PickerBuildInfo) balancer.Picker +} + +// PickerBuildInfo contains information needed by the picker builder to +// construct a picker. +type PickerBuildInfo struct { + // ReadySCs is a map from all ready SubConns to the Addresses used to + // create them. + ReadySCs map[balancer.SubConn]SubConnInfo +} + +// SubConnInfo contains information about a SubConn created by the base +// balancer. +type SubConnInfo struct { + Address resolver.Address // the address used to create this SubConn +} + +// Config contains the config info about the base balancer builder. +type Config struct { + // HealthCheck indicates whether health checking should be enabled for this specific balancer. + HealthCheck bool +} + +// NewBalancerBuilder returns a base balancer builder configured by the provided config. +func NewBalancerBuilder(name string, pb PickerBuilder, config Config) balancer.Builder { + return &baseBuilder{ + name: name, + pickerBuilder: pb, + config: config, + } +} diff --git a/vendor/google.golang.org/grpc/balancer/grpclb/state/state.go b/vendor/google.golang.org/grpc/balancer/grpclb/state/state.go new file mode 100644 index 000000000..a24264a34 --- /dev/null +++ b/vendor/google.golang.org/grpc/balancer/grpclb/state/state.go @@ -0,0 +1,51 @@ +/* + * + * Copyright 2020 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package state declares grpclb types to be set by resolvers wishing to pass +// information to grpclb via resolver.State Attributes. +package state + +import ( + "google.golang.org/grpc/resolver" +) + +// keyType is the key to use for storing State in Attributes. +type keyType string + +const key = keyType("grpc.grpclb.state") + +// State contains gRPCLB-relevant data passed from the name resolver. +type State struct { + // BalancerAddresses contains the remote load balancer address(es). If + // set, overrides any resolver-provided addresses with Type of GRPCLB. + BalancerAddresses []resolver.Address +} + +// Set returns a copy of the provided state with attributes containing s. s's +// data should not be mutated after calling Set. +func Set(state resolver.State, s *State) resolver.State { + state.Attributes = state.Attributes.WithValues(key, s) + return state +} + +// Get returns the grpclb State in the resolver.State, or nil if not present. +// The returned data should not be mutated. +func Get(state resolver.State) *State { + s, _ := state.Attributes.Value(key).(*State) + return s +} diff --git a/vendor/google.golang.org/grpc/balancer/roundrobin/roundrobin.go b/vendor/google.golang.org/grpc/balancer/roundrobin/roundrobin.go new file mode 100644 index 000000000..43c2a1537 --- /dev/null +++ b/vendor/google.golang.org/grpc/balancer/roundrobin/roundrobin.go @@ -0,0 +1,83 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package roundrobin defines a roundrobin balancer. Roundrobin balancer is +// installed as one of the default balancers in gRPC, users don't need to +// explicitly install this balancer. +package roundrobin + +import ( + "sync" + + "google.golang.org/grpc/balancer" + "google.golang.org/grpc/balancer/base" + "google.golang.org/grpc/grpclog" + "google.golang.org/grpc/internal/grpcrand" +) + +// Name is the name of round_robin balancer. +const Name = "round_robin" + +var logger = grpclog.Component("roundrobin") + +// newBuilder creates a new roundrobin balancer builder. +func newBuilder() balancer.Builder { + return base.NewBalancerBuilder(Name, &rrPickerBuilder{}, base.Config{HealthCheck: true}) +} + +func init() { + balancer.Register(newBuilder()) +} + +type rrPickerBuilder struct{} + +func (*rrPickerBuilder) Build(info base.PickerBuildInfo) balancer.Picker { + logger.Infof("roundrobinPicker: newPicker called with info: %v", info) + if len(info.ReadySCs) == 0 { + return base.NewErrPicker(balancer.ErrNoSubConnAvailable) + } + var scs []balancer.SubConn + for sc := range info.ReadySCs { + scs = append(scs, sc) + } + return &rrPicker{ + subConns: scs, + // Start at a random index, as the same RR balancer rebuilds a new + // picker when SubConn states change, and we don't want to apply excess + // load to the first server in the list. + next: grpcrand.Intn(len(scs)), + } +} + +type rrPicker struct { + // subConns is the snapshot of the roundrobin balancer when this picker was + // created. The slice is immutable. Each Get() will do a round robin + // selection from it and return the selected SubConn. + subConns []balancer.SubConn + + mu sync.Mutex + next int +} + +func (p *rrPicker) Pick(balancer.PickInfo) (balancer.PickResult, error) { + p.mu.Lock() + sc := p.subConns[p.next] + p.next = (p.next + 1) % len(p.subConns) + p.mu.Unlock() + return balancer.PickResult{SubConn: sc}, nil +} diff --git a/vendor/google.golang.org/grpc/balancer_conn_wrappers.go b/vendor/google.golang.org/grpc/balancer_conn_wrappers.go new file mode 100644 index 000000000..11e592aab --- /dev/null +++ b/vendor/google.golang.org/grpc/balancer_conn_wrappers.go @@ -0,0 +1,246 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpc + +import ( + "fmt" + "sync" + + "google.golang.org/grpc/balancer" + "google.golang.org/grpc/connectivity" + "google.golang.org/grpc/internal/buffer" + "google.golang.org/grpc/internal/channelz" + "google.golang.org/grpc/internal/grpcsync" + "google.golang.org/grpc/resolver" +) + +// scStateUpdate contains the subConn and the new state it changed to. +type scStateUpdate struct { + sc balancer.SubConn + state connectivity.State + err error +} + +// ccBalancerWrapper is a wrapper on top of cc for balancers. +// It implements balancer.ClientConn interface. +type ccBalancerWrapper struct { + cc *ClientConn + balancerMu sync.Mutex // synchronizes calls to the balancer + balancer balancer.Balancer + scBuffer *buffer.Unbounded + done *grpcsync.Event + + mu sync.Mutex + subConns map[*acBalancerWrapper]struct{} +} + +func newCCBalancerWrapper(cc *ClientConn, b balancer.Builder, bopts balancer.BuildOptions) *ccBalancerWrapper { + ccb := &ccBalancerWrapper{ + cc: cc, + scBuffer: buffer.NewUnbounded(), + done: grpcsync.NewEvent(), + subConns: make(map[*acBalancerWrapper]struct{}), + } + go ccb.watcher() + ccb.balancer = b.Build(ccb, bopts) + return ccb +} + +// watcher balancer functions sequentially, so the balancer can be implemented +// lock-free. +func (ccb *ccBalancerWrapper) watcher() { + for { + select { + case t := <-ccb.scBuffer.Get(): + ccb.scBuffer.Load() + if ccb.done.HasFired() { + break + } + ccb.balancerMu.Lock() + su := t.(*scStateUpdate) + ccb.balancer.UpdateSubConnState(su.sc, balancer.SubConnState{ConnectivityState: su.state, ConnectionError: su.err}) + ccb.balancerMu.Unlock() + case <-ccb.done.Done(): + } + + if ccb.done.HasFired() { + ccb.balancer.Close() + ccb.mu.Lock() + scs := ccb.subConns + ccb.subConns = nil + ccb.mu.Unlock() + for acbw := range scs { + ccb.cc.removeAddrConn(acbw.getAddrConn(), errConnDrain) + } + ccb.UpdateState(balancer.State{ConnectivityState: connectivity.Connecting, Picker: nil}) + return + } + } +} + +func (ccb *ccBalancerWrapper) close() { + ccb.done.Fire() +} + +func (ccb *ccBalancerWrapper) handleSubConnStateChange(sc balancer.SubConn, s connectivity.State, err error) { + // When updating addresses for a SubConn, if the address in use is not in + // the new addresses, the old ac will be tearDown() and a new ac will be + // created. tearDown() generates a state change with Shutdown state, we + // don't want the balancer to receive this state change. So before + // tearDown() on the old ac, ac.acbw (acWrapper) will be set to nil, and + // this function will be called with (nil, Shutdown). We don't need to call + // balancer method in this case. + if sc == nil { + return + } + ccb.scBuffer.Put(&scStateUpdate{ + sc: sc, + state: s, + err: err, + }) +} + +func (ccb *ccBalancerWrapper) updateClientConnState(ccs *balancer.ClientConnState) error { + ccb.balancerMu.Lock() + defer ccb.balancerMu.Unlock() + return ccb.balancer.UpdateClientConnState(*ccs) +} + +func (ccb *ccBalancerWrapper) resolverError(err error) { + ccb.balancerMu.Lock() + ccb.balancer.ResolverError(err) + ccb.balancerMu.Unlock() +} + +func (ccb *ccBalancerWrapper) NewSubConn(addrs []resolver.Address, opts balancer.NewSubConnOptions) (balancer.SubConn, error) { + if len(addrs) <= 0 { + return nil, fmt.Errorf("grpc: cannot create SubConn with empty address list") + } + ccb.mu.Lock() + defer ccb.mu.Unlock() + if ccb.subConns == nil { + return nil, fmt.Errorf("grpc: ClientConn balancer wrapper was closed") + } + ac, err := ccb.cc.newAddrConn(addrs, opts) + if err != nil { + return nil, err + } + acbw := &acBalancerWrapper{ac: ac} + acbw.ac.mu.Lock() + ac.acbw = acbw + acbw.ac.mu.Unlock() + ccb.subConns[acbw] = struct{}{} + return acbw, nil +} + +func (ccb *ccBalancerWrapper) RemoveSubConn(sc balancer.SubConn) { + acbw, ok := sc.(*acBalancerWrapper) + if !ok { + return + } + ccb.mu.Lock() + defer ccb.mu.Unlock() + if ccb.subConns == nil { + return + } + delete(ccb.subConns, acbw) + ccb.cc.removeAddrConn(acbw.getAddrConn(), errConnDrain) +} + +func (ccb *ccBalancerWrapper) UpdateState(s balancer.State) { + ccb.mu.Lock() + defer ccb.mu.Unlock() + if ccb.subConns == nil { + return + } + // Update picker before updating state. Even though the ordering here does + // not matter, it can lead to multiple calls of Pick in the common start-up + // case where we wait for ready and then perform an RPC. If the picker is + // updated later, we could call the "connecting" picker when the state is + // updated, and then call the "ready" picker after the picker gets updated. + ccb.cc.blockingpicker.updatePicker(s.Picker) + ccb.cc.csMgr.updateState(s.ConnectivityState) +} + +func (ccb *ccBalancerWrapper) ResolveNow(o resolver.ResolveNowOptions) { + ccb.cc.resolveNow(o) +} + +func (ccb *ccBalancerWrapper) Target() string { + return ccb.cc.target +} + +// acBalancerWrapper is a wrapper on top of ac for balancers. +// It implements balancer.SubConn interface. +type acBalancerWrapper struct { + mu sync.Mutex + ac *addrConn +} + +func (acbw *acBalancerWrapper) UpdateAddresses(addrs []resolver.Address) { + acbw.mu.Lock() + defer acbw.mu.Unlock() + if len(addrs) <= 0 { + acbw.ac.tearDown(errConnDrain) + return + } + if !acbw.ac.tryUpdateAddrs(addrs) { + cc := acbw.ac.cc + opts := acbw.ac.scopts + acbw.ac.mu.Lock() + // Set old ac.acbw to nil so the Shutdown state update will be ignored + // by balancer. + // + // TODO(bar) the state transition could be wrong when tearDown() old ac + // and creating new ac, fix the transition. + acbw.ac.acbw = nil + acbw.ac.mu.Unlock() + acState := acbw.ac.getState() + acbw.ac.tearDown(errConnDrain) + + if acState == connectivity.Shutdown { + return + } + + ac, err := cc.newAddrConn(addrs, opts) + if err != nil { + channelz.Warningf(logger, acbw.ac.channelzID, "acBalancerWrapper: UpdateAddresses: failed to newAddrConn: %v", err) + return + } + acbw.ac = ac + ac.mu.Lock() + ac.acbw = acbw + ac.mu.Unlock() + if acState != connectivity.Idle { + ac.connect() + } + } +} + +func (acbw *acBalancerWrapper) Connect() { + acbw.mu.Lock() + defer acbw.mu.Unlock() + acbw.ac.connect() +} + +func (acbw *acBalancerWrapper) getAddrConn() *addrConn { + acbw.mu.Lock() + defer acbw.mu.Unlock() + return acbw.ac +} diff --git a/vendor/google.golang.org/grpc/binarylog/grpc_binarylog_v1/binarylog.pb.go b/vendor/google.golang.org/grpc/binarylog/grpc_binarylog_v1/binarylog.pb.go new file mode 100644 index 000000000..da0472967 --- /dev/null +++ b/vendor/google.golang.org/grpc/binarylog/grpc_binarylog_v1/binarylog.pb.go @@ -0,0 +1,1187 @@ +// Copyright 2018 The gRPC Authors +// All rights reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// The canonical version of this proto can be found at +// https://github.com/grpc/grpc-proto/blob/master/grpc/binlog/v1/binarylog.proto + +// Code generated by protoc-gen-go. DO NOT EDIT. +// versions: +// protoc-gen-go v1.25.0 +// protoc v3.3.0 +// source: grpc/binlog/v1/binarylog.proto + +package grpc_binarylog_v1 + +import ( + proto "github.com/golang/protobuf/proto" + duration "github.com/golang/protobuf/ptypes/duration" + timestamp "github.com/golang/protobuf/ptypes/timestamp" + protoreflect "google.golang.org/protobuf/reflect/protoreflect" + protoimpl "google.golang.org/protobuf/runtime/protoimpl" + reflect "reflect" + sync "sync" +) + +const ( + // Verify that this generated code is sufficiently up-to-date. + _ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion) + // Verify that runtime/protoimpl is sufficiently up-to-date. + _ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20) +) + +// This is a compile-time assertion that a sufficiently up-to-date version +// of the legacy proto package is being used. +const _ = proto.ProtoPackageIsVersion4 + +// Enumerates the type of event +// Note the terminology is different from the RPC semantics +// definition, but the same meaning is expressed here. +type GrpcLogEntry_EventType int32 + +const ( + GrpcLogEntry_EVENT_TYPE_UNKNOWN GrpcLogEntry_EventType = 0 + // Header sent from client to server + GrpcLogEntry_EVENT_TYPE_CLIENT_HEADER GrpcLogEntry_EventType = 1 + // Header sent from server to client + GrpcLogEntry_EVENT_TYPE_SERVER_HEADER GrpcLogEntry_EventType = 2 + // Message sent from client to server + GrpcLogEntry_EVENT_TYPE_CLIENT_MESSAGE GrpcLogEntry_EventType = 3 + // Message sent from server to client + GrpcLogEntry_EVENT_TYPE_SERVER_MESSAGE GrpcLogEntry_EventType = 4 + // A signal that client is done sending + GrpcLogEntry_EVENT_TYPE_CLIENT_HALF_CLOSE GrpcLogEntry_EventType = 5 + // Trailer indicates the end of the RPC. + // On client side, this event means a trailer was either received + // from the network or the gRPC library locally generated a status + // to inform the application about a failure. + // On server side, this event means the server application requested + // to send a trailer. Note: EVENT_TYPE_CANCEL may still arrive after + // this due to races on server side. + GrpcLogEntry_EVENT_TYPE_SERVER_TRAILER GrpcLogEntry_EventType = 6 + // A signal that the RPC is cancelled. On client side, this + // indicates the client application requests a cancellation. + // On server side, this indicates that cancellation was detected. + // Note: This marks the end of the RPC. Events may arrive after + // this due to races. For example, on client side a trailer + // may arrive even though the application requested to cancel the RPC. + GrpcLogEntry_EVENT_TYPE_CANCEL GrpcLogEntry_EventType = 7 +) + +// Enum value maps for GrpcLogEntry_EventType. +var ( + GrpcLogEntry_EventType_name = map[int32]string{ + 0: "EVENT_TYPE_UNKNOWN", + 1: "EVENT_TYPE_CLIENT_HEADER", + 2: "EVENT_TYPE_SERVER_HEADER", + 3: "EVENT_TYPE_CLIENT_MESSAGE", + 4: "EVENT_TYPE_SERVER_MESSAGE", + 5: "EVENT_TYPE_CLIENT_HALF_CLOSE", + 6: "EVENT_TYPE_SERVER_TRAILER", + 7: "EVENT_TYPE_CANCEL", + } + GrpcLogEntry_EventType_value = map[string]int32{ + "EVENT_TYPE_UNKNOWN": 0, + "EVENT_TYPE_CLIENT_HEADER": 1, + "EVENT_TYPE_SERVER_HEADER": 2, + "EVENT_TYPE_CLIENT_MESSAGE": 3, + "EVENT_TYPE_SERVER_MESSAGE": 4, + "EVENT_TYPE_CLIENT_HALF_CLOSE": 5, + "EVENT_TYPE_SERVER_TRAILER": 6, + "EVENT_TYPE_CANCEL": 7, + } +) + +func (x GrpcLogEntry_EventType) Enum() *GrpcLogEntry_EventType { + p := new(GrpcLogEntry_EventType) + *p = x + return p +} + +func (x GrpcLogEntry_EventType) String() string { + return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x)) +} + +func (GrpcLogEntry_EventType) Descriptor() protoreflect.EnumDescriptor { + return file_grpc_binlog_v1_binarylog_proto_enumTypes[0].Descriptor() +} + +func (GrpcLogEntry_EventType) Type() protoreflect.EnumType { + return &file_grpc_binlog_v1_binarylog_proto_enumTypes[0] +} + +func (x GrpcLogEntry_EventType) Number() protoreflect.EnumNumber { + return protoreflect.EnumNumber(x) +} + +// Deprecated: Use GrpcLogEntry_EventType.Descriptor instead. +func (GrpcLogEntry_EventType) EnumDescriptor() ([]byte, []int) { + return file_grpc_binlog_v1_binarylog_proto_rawDescGZIP(), []int{0, 0} +} + +// Enumerates the entity that generates the log entry +type GrpcLogEntry_Logger int32 + +const ( + GrpcLogEntry_LOGGER_UNKNOWN GrpcLogEntry_Logger = 0 + GrpcLogEntry_LOGGER_CLIENT GrpcLogEntry_Logger = 1 + GrpcLogEntry_LOGGER_SERVER GrpcLogEntry_Logger = 2 +) + +// Enum value maps for GrpcLogEntry_Logger. +var ( + GrpcLogEntry_Logger_name = map[int32]string{ + 0: "LOGGER_UNKNOWN", + 1: "LOGGER_CLIENT", + 2: "LOGGER_SERVER", + } + GrpcLogEntry_Logger_value = map[string]int32{ + "LOGGER_UNKNOWN": 0, + "LOGGER_CLIENT": 1, + "LOGGER_SERVER": 2, + } +) + +func (x GrpcLogEntry_Logger) Enum() *GrpcLogEntry_Logger { + p := new(GrpcLogEntry_Logger) + *p = x + return p +} + +func (x GrpcLogEntry_Logger) String() string { + return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x)) +} + +func (GrpcLogEntry_Logger) Descriptor() protoreflect.EnumDescriptor { + return file_grpc_binlog_v1_binarylog_proto_enumTypes[1].Descriptor() +} + +func (GrpcLogEntry_Logger) Type() protoreflect.EnumType { + return &file_grpc_binlog_v1_binarylog_proto_enumTypes[1] +} + +func (x GrpcLogEntry_Logger) Number() protoreflect.EnumNumber { + return protoreflect.EnumNumber(x) +} + +// Deprecated: Use GrpcLogEntry_Logger.Descriptor instead. +func (GrpcLogEntry_Logger) EnumDescriptor() ([]byte, []int) { + return file_grpc_binlog_v1_binarylog_proto_rawDescGZIP(), []int{0, 1} +} + +type Address_Type int32 + +const ( + Address_TYPE_UNKNOWN Address_Type = 0 + // address is in 1.2.3.4 form + Address_TYPE_IPV4 Address_Type = 1 + // address is in IPv6 canonical form (RFC5952 section 4) + // The scope is NOT included in the address string. + Address_TYPE_IPV6 Address_Type = 2 + // address is UDS string + Address_TYPE_UNIX Address_Type = 3 +) + +// Enum value maps for Address_Type. +var ( + Address_Type_name = map[int32]string{ + 0: "TYPE_UNKNOWN", + 1: "TYPE_IPV4", + 2: "TYPE_IPV6", + 3: "TYPE_UNIX", + } + Address_Type_value = map[string]int32{ + "TYPE_UNKNOWN": 0, + "TYPE_IPV4": 1, + "TYPE_IPV6": 2, + "TYPE_UNIX": 3, + } +) + +func (x Address_Type) Enum() *Address_Type { + p := new(Address_Type) + *p = x + return p +} + +func (x Address_Type) String() string { + return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x)) +} + +func (Address_Type) Descriptor() protoreflect.EnumDescriptor { + return file_grpc_binlog_v1_binarylog_proto_enumTypes[2].Descriptor() +} + +func (Address_Type) Type() protoreflect.EnumType { + return &file_grpc_binlog_v1_binarylog_proto_enumTypes[2] +} + +func (x Address_Type) Number() protoreflect.EnumNumber { + return protoreflect.EnumNumber(x) +} + +// Deprecated: Use Address_Type.Descriptor instead. +func (Address_Type) EnumDescriptor() ([]byte, []int) { + return file_grpc_binlog_v1_binarylog_proto_rawDescGZIP(), []int{7, 0} +} + +// Log entry we store in binary logs +type GrpcLogEntry struct { + state protoimpl.MessageState + sizeCache protoimpl.SizeCache + unknownFields protoimpl.UnknownFields + + // The timestamp of the binary log message + Timestamp *timestamp.Timestamp `protobuf:"bytes,1,opt,name=timestamp,proto3" json:"timestamp,omitempty"` + // Uniquely identifies a call. The value must not be 0 in order to disambiguate + // from an unset value. + // Each call may have several log entries, they will all have the same call_id. + // Nothing is guaranteed about their value other than they are unique across + // different RPCs in the same gRPC process. + CallId uint64 `protobuf:"varint,2,opt,name=call_id,json=callId,proto3" json:"call_id,omitempty"` + // The entry sequence id for this call. The first GrpcLogEntry has a + // value of 1, to disambiguate from an unset value. The purpose of + // this field is to detect missing entries in environments where + // durability or ordering is not guaranteed. + SequenceIdWithinCall uint64 `protobuf:"varint,3,opt,name=sequence_id_within_call,json=sequenceIdWithinCall,proto3" json:"sequence_id_within_call,omitempty"` + Type GrpcLogEntry_EventType `protobuf:"varint,4,opt,name=type,proto3,enum=grpc.binarylog.v1.GrpcLogEntry_EventType" json:"type,omitempty"` + Logger GrpcLogEntry_Logger `protobuf:"varint,5,opt,name=logger,proto3,enum=grpc.binarylog.v1.GrpcLogEntry_Logger" json:"logger,omitempty"` // One of the above Logger enum + // The logger uses one of the following fields to record the payload, + // according to the type of the log entry. + // + // Types that are assignable to Payload: + // *GrpcLogEntry_ClientHeader + // *GrpcLogEntry_ServerHeader + // *GrpcLogEntry_Message + // *GrpcLogEntry_Trailer + Payload isGrpcLogEntry_Payload `protobuf_oneof:"payload"` + // true if payload does not represent the full message or metadata. + PayloadTruncated bool `protobuf:"varint,10,opt,name=payload_truncated,json=payloadTruncated,proto3" json:"payload_truncated,omitempty"` + // Peer address information, will only be recorded on the first + // incoming event. On client side, peer is logged on + // EVENT_TYPE_SERVER_HEADER normally or EVENT_TYPE_SERVER_TRAILER in + // the case of trailers-only. On server side, peer is always + // logged on EVENT_TYPE_CLIENT_HEADER. + Peer *Address `protobuf:"bytes,11,opt,name=peer,proto3" json:"peer,omitempty"` +} + +func (x *GrpcLogEntry) Reset() { + *x = GrpcLogEntry{} + if protoimpl.UnsafeEnabled { + mi := &file_grpc_binlog_v1_binarylog_proto_msgTypes[0] + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + ms.StoreMessageInfo(mi) + } +} + +func (x *GrpcLogEntry) String() string { + return protoimpl.X.MessageStringOf(x) +} + +func (*GrpcLogEntry) ProtoMessage() {} + +func (x *GrpcLogEntry) ProtoReflect() protoreflect.Message { + mi := &file_grpc_binlog_v1_binarylog_proto_msgTypes[0] + if protoimpl.UnsafeEnabled && x != nil { + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + if ms.LoadMessageInfo() == nil { + ms.StoreMessageInfo(mi) + } + return ms + } + return mi.MessageOf(x) +} + +// Deprecated: Use GrpcLogEntry.ProtoReflect.Descriptor instead. +func (*GrpcLogEntry) Descriptor() ([]byte, []int) { + return file_grpc_binlog_v1_binarylog_proto_rawDescGZIP(), []int{0} +} + +func (x *GrpcLogEntry) GetTimestamp() *timestamp.Timestamp { + if x != nil { + return x.Timestamp + } + return nil +} + +func (x *GrpcLogEntry) GetCallId() uint64 { + if x != nil { + return x.CallId + } + return 0 +} + +func (x *GrpcLogEntry) GetSequenceIdWithinCall() uint64 { + if x != nil { + return x.SequenceIdWithinCall + } + return 0 +} + +func (x *GrpcLogEntry) GetType() GrpcLogEntry_EventType { + if x != nil { + return x.Type + } + return GrpcLogEntry_EVENT_TYPE_UNKNOWN +} + +func (x *GrpcLogEntry) GetLogger() GrpcLogEntry_Logger { + if x != nil { + return x.Logger + } + return GrpcLogEntry_LOGGER_UNKNOWN +} + +func (m *GrpcLogEntry) GetPayload() isGrpcLogEntry_Payload { + if m != nil { + return m.Payload + } + return nil +} + +func (x *GrpcLogEntry) GetClientHeader() *ClientHeader { + if x, ok := x.GetPayload().(*GrpcLogEntry_ClientHeader); ok { + return x.ClientHeader + } + return nil +} + +func (x *GrpcLogEntry) GetServerHeader() *ServerHeader { + if x, ok := x.GetPayload().(*GrpcLogEntry_ServerHeader); ok { + return x.ServerHeader + } + return nil +} + +func (x *GrpcLogEntry) GetMessage() *Message { + if x, ok := x.GetPayload().(*GrpcLogEntry_Message); ok { + return x.Message + } + return nil +} + +func (x *GrpcLogEntry) GetTrailer() *Trailer { + if x, ok := x.GetPayload().(*GrpcLogEntry_Trailer); ok { + return x.Trailer + } + return nil +} + +func (x *GrpcLogEntry) GetPayloadTruncated() bool { + if x != nil { + return x.PayloadTruncated + } + return false +} + +func (x *GrpcLogEntry) GetPeer() *Address { + if x != nil { + return x.Peer + } + return nil +} + +type isGrpcLogEntry_Payload interface { + isGrpcLogEntry_Payload() +} + +type GrpcLogEntry_ClientHeader struct { + ClientHeader *ClientHeader `protobuf:"bytes,6,opt,name=client_header,json=clientHeader,proto3,oneof"` +} + +type GrpcLogEntry_ServerHeader struct { + ServerHeader *ServerHeader `protobuf:"bytes,7,opt,name=server_header,json=serverHeader,proto3,oneof"` +} + +type GrpcLogEntry_Message struct { + // Used by EVENT_TYPE_CLIENT_MESSAGE, EVENT_TYPE_SERVER_MESSAGE + Message *Message `protobuf:"bytes,8,opt,name=message,proto3,oneof"` +} + +type GrpcLogEntry_Trailer struct { + Trailer *Trailer `protobuf:"bytes,9,opt,name=trailer,proto3,oneof"` +} + +func (*GrpcLogEntry_ClientHeader) isGrpcLogEntry_Payload() {} + +func (*GrpcLogEntry_ServerHeader) isGrpcLogEntry_Payload() {} + +func (*GrpcLogEntry_Message) isGrpcLogEntry_Payload() {} + +func (*GrpcLogEntry_Trailer) isGrpcLogEntry_Payload() {} + +type ClientHeader struct { + state protoimpl.MessageState + sizeCache protoimpl.SizeCache + unknownFields protoimpl.UnknownFields + + // This contains only the metadata from the application. + Metadata *Metadata `protobuf:"bytes,1,opt,name=metadata,proto3" json:"metadata,omitempty"` + // The name of the RPC method, which looks something like: + // // + // Note the leading "/" character. + MethodName string `protobuf:"bytes,2,opt,name=method_name,json=methodName,proto3" json:"method_name,omitempty"` + // A single process may be used to run multiple virtual + // servers with different identities. + // The authority is the name of such a server identitiy. + // It is typically a portion of the URI in the form of + // or : . + Authority string `protobuf:"bytes,3,opt,name=authority,proto3" json:"authority,omitempty"` + // the RPC timeout + Timeout *duration.Duration `protobuf:"bytes,4,opt,name=timeout,proto3" json:"timeout,omitempty"` +} + +func (x *ClientHeader) Reset() { + *x = ClientHeader{} + if protoimpl.UnsafeEnabled { + mi := &file_grpc_binlog_v1_binarylog_proto_msgTypes[1] + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + ms.StoreMessageInfo(mi) + } +} + +func (x *ClientHeader) String() string { + return protoimpl.X.MessageStringOf(x) +} + +func (*ClientHeader) ProtoMessage() {} + +func (x *ClientHeader) ProtoReflect() protoreflect.Message { + mi := &file_grpc_binlog_v1_binarylog_proto_msgTypes[1] + if protoimpl.UnsafeEnabled && x != nil { + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + if ms.LoadMessageInfo() == nil { + ms.StoreMessageInfo(mi) + } + return ms + } + return mi.MessageOf(x) +} + +// Deprecated: Use ClientHeader.ProtoReflect.Descriptor instead. +func (*ClientHeader) Descriptor() ([]byte, []int) { + return file_grpc_binlog_v1_binarylog_proto_rawDescGZIP(), []int{1} +} + +func (x *ClientHeader) GetMetadata() *Metadata { + if x != nil { + return x.Metadata + } + return nil +} + +func (x *ClientHeader) GetMethodName() string { + if x != nil { + return x.MethodName + } + return "" +} + +func (x *ClientHeader) GetAuthority() string { + if x != nil { + return x.Authority + } + return "" +} + +func (x *ClientHeader) GetTimeout() *duration.Duration { + if x != nil { + return x.Timeout + } + return nil +} + +type ServerHeader struct { + state protoimpl.MessageState + sizeCache protoimpl.SizeCache + unknownFields protoimpl.UnknownFields + + // This contains only the metadata from the application. + Metadata *Metadata `protobuf:"bytes,1,opt,name=metadata,proto3" json:"metadata,omitempty"` +} + +func (x *ServerHeader) Reset() { + *x = ServerHeader{} + if protoimpl.UnsafeEnabled { + mi := &file_grpc_binlog_v1_binarylog_proto_msgTypes[2] + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + ms.StoreMessageInfo(mi) + } +} + +func (x *ServerHeader) String() string { + return protoimpl.X.MessageStringOf(x) +} + +func (*ServerHeader) ProtoMessage() {} + +func (x *ServerHeader) ProtoReflect() protoreflect.Message { + mi := &file_grpc_binlog_v1_binarylog_proto_msgTypes[2] + if protoimpl.UnsafeEnabled && x != nil { + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + if ms.LoadMessageInfo() == nil { + ms.StoreMessageInfo(mi) + } + return ms + } + return mi.MessageOf(x) +} + +// Deprecated: Use ServerHeader.ProtoReflect.Descriptor instead. +func (*ServerHeader) Descriptor() ([]byte, []int) { + return file_grpc_binlog_v1_binarylog_proto_rawDescGZIP(), []int{2} +} + +func (x *ServerHeader) GetMetadata() *Metadata { + if x != nil { + return x.Metadata + } + return nil +} + +type Trailer struct { + state protoimpl.MessageState + sizeCache protoimpl.SizeCache + unknownFields protoimpl.UnknownFields + + // This contains only the metadata from the application. + Metadata *Metadata `protobuf:"bytes,1,opt,name=metadata,proto3" json:"metadata,omitempty"` + // The gRPC status code. + StatusCode uint32 `protobuf:"varint,2,opt,name=status_code,json=statusCode,proto3" json:"status_code,omitempty"` + // An original status message before any transport specific + // encoding. + StatusMessage string `protobuf:"bytes,3,opt,name=status_message,json=statusMessage,proto3" json:"status_message,omitempty"` + // The value of the 'grpc-status-details-bin' metadata key. If + // present, this is always an encoded 'google.rpc.Status' message. + StatusDetails []byte `protobuf:"bytes,4,opt,name=status_details,json=statusDetails,proto3" json:"status_details,omitempty"` +} + +func (x *Trailer) Reset() { + *x = Trailer{} + if protoimpl.UnsafeEnabled { + mi := &file_grpc_binlog_v1_binarylog_proto_msgTypes[3] + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + ms.StoreMessageInfo(mi) + } +} + +func (x *Trailer) String() string { + return protoimpl.X.MessageStringOf(x) +} + +func (*Trailer) ProtoMessage() {} + +func (x *Trailer) ProtoReflect() protoreflect.Message { + mi := &file_grpc_binlog_v1_binarylog_proto_msgTypes[3] + if protoimpl.UnsafeEnabled && x != nil { + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + if ms.LoadMessageInfo() == nil { + ms.StoreMessageInfo(mi) + } + return ms + } + return mi.MessageOf(x) +} + +// Deprecated: Use Trailer.ProtoReflect.Descriptor instead. +func (*Trailer) Descriptor() ([]byte, []int) { + return file_grpc_binlog_v1_binarylog_proto_rawDescGZIP(), []int{3} +} + +func (x *Trailer) GetMetadata() *Metadata { + if x != nil { + return x.Metadata + } + return nil +} + +func (x *Trailer) GetStatusCode() uint32 { + if x != nil { + return x.StatusCode + } + return 0 +} + +func (x *Trailer) GetStatusMessage() string { + if x != nil { + return x.StatusMessage + } + return "" +} + +func (x *Trailer) GetStatusDetails() []byte { + if x != nil { + return x.StatusDetails + } + return nil +} + +// Message payload, used by CLIENT_MESSAGE and SERVER_MESSAGE +type Message struct { + state protoimpl.MessageState + sizeCache protoimpl.SizeCache + unknownFields protoimpl.UnknownFields + + // Length of the message. It may not be the same as the length of the + // data field, as the logging payload can be truncated or omitted. + Length uint32 `protobuf:"varint,1,opt,name=length,proto3" json:"length,omitempty"` + // May be truncated or omitted. + Data []byte `protobuf:"bytes,2,opt,name=data,proto3" json:"data,omitempty"` +} + +func (x *Message) Reset() { + *x = Message{} + if protoimpl.UnsafeEnabled { + mi := &file_grpc_binlog_v1_binarylog_proto_msgTypes[4] + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + ms.StoreMessageInfo(mi) + } +} + +func (x *Message) String() string { + return protoimpl.X.MessageStringOf(x) +} + +func (*Message) ProtoMessage() {} + +func (x *Message) ProtoReflect() protoreflect.Message { + mi := &file_grpc_binlog_v1_binarylog_proto_msgTypes[4] + if protoimpl.UnsafeEnabled && x != nil { + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + if ms.LoadMessageInfo() == nil { + ms.StoreMessageInfo(mi) + } + return ms + } + return mi.MessageOf(x) +} + +// Deprecated: Use Message.ProtoReflect.Descriptor instead. +func (*Message) Descriptor() ([]byte, []int) { + return file_grpc_binlog_v1_binarylog_proto_rawDescGZIP(), []int{4} +} + +func (x *Message) GetLength() uint32 { + if x != nil { + return x.Length + } + return 0 +} + +func (x *Message) GetData() []byte { + if x != nil { + return x.Data + } + return nil +} + +// A list of metadata pairs, used in the payload of client header, +// server header, and server trailer. +// Implementations may omit some entries to honor the header limits +// of GRPC_BINARY_LOG_CONFIG. +// +// Header keys added by gRPC are omitted. To be more specific, +// implementations will not log the following entries, and this is +// not to be treated as a truncation: +// - entries handled by grpc that are not user visible, such as those +// that begin with 'grpc-' (with exception of grpc-trace-bin) +// or keys like 'lb-token' +// - transport specific entries, including but not limited to: +// ':path', ':authority', 'content-encoding', 'user-agent', 'te', etc +// - entries added for call credentials +// +// Implementations must always log grpc-trace-bin if it is present. +// Practically speaking it will only be visible on server side because +// grpc-trace-bin is managed by low level client side mechanisms +// inaccessible from the application level. On server side, the +// header is just a normal metadata key. +// The pair will not count towards the size limit. +type Metadata struct { + state protoimpl.MessageState + sizeCache protoimpl.SizeCache + unknownFields protoimpl.UnknownFields + + Entry []*MetadataEntry `protobuf:"bytes,1,rep,name=entry,proto3" json:"entry,omitempty"` +} + +func (x *Metadata) Reset() { + *x = Metadata{} + if protoimpl.UnsafeEnabled { + mi := &file_grpc_binlog_v1_binarylog_proto_msgTypes[5] + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + ms.StoreMessageInfo(mi) + } +} + +func (x *Metadata) String() string { + return protoimpl.X.MessageStringOf(x) +} + +func (*Metadata) ProtoMessage() {} + +func (x *Metadata) ProtoReflect() protoreflect.Message { + mi := &file_grpc_binlog_v1_binarylog_proto_msgTypes[5] + if protoimpl.UnsafeEnabled && x != nil { + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + if ms.LoadMessageInfo() == nil { + ms.StoreMessageInfo(mi) + } + return ms + } + return mi.MessageOf(x) +} + +// Deprecated: Use Metadata.ProtoReflect.Descriptor instead. +func (*Metadata) Descriptor() ([]byte, []int) { + return file_grpc_binlog_v1_binarylog_proto_rawDescGZIP(), []int{5} +} + +func (x *Metadata) GetEntry() []*MetadataEntry { + if x != nil { + return x.Entry + } + return nil +} + +// A metadata key value pair +type MetadataEntry struct { + state protoimpl.MessageState + sizeCache protoimpl.SizeCache + unknownFields protoimpl.UnknownFields + + Key string `protobuf:"bytes,1,opt,name=key,proto3" json:"key,omitempty"` + Value []byte `protobuf:"bytes,2,opt,name=value,proto3" json:"value,omitempty"` +} + +func (x *MetadataEntry) Reset() { + *x = MetadataEntry{} + if protoimpl.UnsafeEnabled { + mi := &file_grpc_binlog_v1_binarylog_proto_msgTypes[6] + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + ms.StoreMessageInfo(mi) + } +} + +func (x *MetadataEntry) String() string { + return protoimpl.X.MessageStringOf(x) +} + +func (*MetadataEntry) ProtoMessage() {} + +func (x *MetadataEntry) ProtoReflect() protoreflect.Message { + mi := &file_grpc_binlog_v1_binarylog_proto_msgTypes[6] + if protoimpl.UnsafeEnabled && x != nil { + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + if ms.LoadMessageInfo() == nil { + ms.StoreMessageInfo(mi) + } + return ms + } + return mi.MessageOf(x) +} + +// Deprecated: Use MetadataEntry.ProtoReflect.Descriptor instead. +func (*MetadataEntry) Descriptor() ([]byte, []int) { + return file_grpc_binlog_v1_binarylog_proto_rawDescGZIP(), []int{6} +} + +func (x *MetadataEntry) GetKey() string { + if x != nil { + return x.Key + } + return "" +} + +func (x *MetadataEntry) GetValue() []byte { + if x != nil { + return x.Value + } + return nil +} + +// Address information +type Address struct { + state protoimpl.MessageState + sizeCache protoimpl.SizeCache + unknownFields protoimpl.UnknownFields + + Type Address_Type `protobuf:"varint,1,opt,name=type,proto3,enum=grpc.binarylog.v1.Address_Type" json:"type,omitempty"` + Address string `protobuf:"bytes,2,opt,name=address,proto3" json:"address,omitempty"` + // only for TYPE_IPV4 and TYPE_IPV6 + IpPort uint32 `protobuf:"varint,3,opt,name=ip_port,json=ipPort,proto3" json:"ip_port,omitempty"` +} + +func (x *Address) Reset() { + *x = Address{} + if protoimpl.UnsafeEnabled { + mi := &file_grpc_binlog_v1_binarylog_proto_msgTypes[7] + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + ms.StoreMessageInfo(mi) + } +} + +func (x *Address) String() string { + return protoimpl.X.MessageStringOf(x) +} + +func (*Address) ProtoMessage() {} + +func (x *Address) ProtoReflect() protoreflect.Message { + mi := &file_grpc_binlog_v1_binarylog_proto_msgTypes[7] + if protoimpl.UnsafeEnabled && x != nil { + ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x)) + if ms.LoadMessageInfo() == nil { + ms.StoreMessageInfo(mi) + } + return ms + } + return mi.MessageOf(x) +} + +// Deprecated: Use Address.ProtoReflect.Descriptor instead. +func (*Address) Descriptor() ([]byte, []int) { + return file_grpc_binlog_v1_binarylog_proto_rawDescGZIP(), []int{7} +} + +func (x *Address) GetType() Address_Type { + if x != nil { + return x.Type + } + return Address_TYPE_UNKNOWN +} + +func (x *Address) GetAddress() string { + if x != nil { + return x.Address + } + return "" +} + +func (x *Address) GetIpPort() uint32 { + if x != nil { + return x.IpPort + } + return 0 +} + +var File_grpc_binlog_v1_binarylog_proto protoreflect.FileDescriptor + +var file_grpc_binlog_v1_binarylog_proto_rawDesc = []byte{ + 0x0a, 0x1e, 0x67, 0x72, 0x70, 0x63, 0x2f, 0x62, 0x69, 0x6e, 0x6c, 0x6f, 0x67, 0x2f, 0x76, 0x31, + 0x2f, 0x62, 0x69, 0x6e, 0x61, 0x72, 0x79, 0x6c, 0x6f, 0x67, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, + 0x12, 0x11, 0x67, 0x72, 0x70, 0x63, 0x2e, 0x62, 0x69, 0x6e, 0x61, 0x72, 0x79, 0x6c, 0x6f, 0x67, + 0x2e, 0x76, 0x31, 0x1a, 0x1e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x74, + 0x6f, 0x62, 0x75, 0x66, 0x2f, 0x64, 0x75, 0x72, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2e, 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file_grpc_binlog_v1_binarylog_proto_rawDescOnce.Do(func() { + file_grpc_binlog_v1_binarylog_proto_rawDescData = protoimpl.X.CompressGZIP(file_grpc_binlog_v1_binarylog_proto_rawDescData) + }) + return file_grpc_binlog_v1_binarylog_proto_rawDescData +} + +var file_grpc_binlog_v1_binarylog_proto_enumTypes = make([]protoimpl.EnumInfo, 3) +var file_grpc_binlog_v1_binarylog_proto_msgTypes = make([]protoimpl.MessageInfo, 8) +var file_grpc_binlog_v1_binarylog_proto_goTypes = []interface{}{ + (GrpcLogEntry_EventType)(0), // 0: grpc.binarylog.v1.GrpcLogEntry.EventType + (GrpcLogEntry_Logger)(0), // 1: grpc.binarylog.v1.GrpcLogEntry.Logger + (Address_Type)(0), // 2: grpc.binarylog.v1.Address.Type + (*GrpcLogEntry)(nil), // 3: grpc.binarylog.v1.GrpcLogEntry + (*ClientHeader)(nil), // 4: grpc.binarylog.v1.ClientHeader + (*ServerHeader)(nil), // 5: grpc.binarylog.v1.ServerHeader + (*Trailer)(nil), // 6: grpc.binarylog.v1.Trailer + (*Message)(nil), // 7: grpc.binarylog.v1.Message + (*Metadata)(nil), // 8: grpc.binarylog.v1.Metadata + (*MetadataEntry)(nil), // 9: grpc.binarylog.v1.MetadataEntry + (*Address)(nil), // 10: grpc.binarylog.v1.Address + (*timestamp.Timestamp)(nil), // 11: google.protobuf.Timestamp + (*duration.Duration)(nil), // 12: google.protobuf.Duration +} +var file_grpc_binlog_v1_binarylog_proto_depIdxs = []int32{ + 11, // 0: grpc.binarylog.v1.GrpcLogEntry.timestamp:type_name -> google.protobuf.Timestamp + 0, // 1: grpc.binarylog.v1.GrpcLogEntry.type:type_name -> grpc.binarylog.v1.GrpcLogEntry.EventType + 1, // 2: grpc.binarylog.v1.GrpcLogEntry.logger:type_name -> grpc.binarylog.v1.GrpcLogEntry.Logger + 4, // 3: grpc.binarylog.v1.GrpcLogEntry.client_header:type_name -> grpc.binarylog.v1.ClientHeader + 5, // 4: grpc.binarylog.v1.GrpcLogEntry.server_header:type_name -> grpc.binarylog.v1.ServerHeader + 7, // 5: grpc.binarylog.v1.GrpcLogEntry.message:type_name -> grpc.binarylog.v1.Message + 6, // 6: grpc.binarylog.v1.GrpcLogEntry.trailer:type_name -> grpc.binarylog.v1.Trailer + 10, // 7: grpc.binarylog.v1.GrpcLogEntry.peer:type_name -> grpc.binarylog.v1.Address + 8, // 8: grpc.binarylog.v1.ClientHeader.metadata:type_name -> grpc.binarylog.v1.Metadata + 12, // 9: grpc.binarylog.v1.ClientHeader.timeout:type_name -> google.protobuf.Duration + 8, // 10: grpc.binarylog.v1.ServerHeader.metadata:type_name -> grpc.binarylog.v1.Metadata + 8, // 11: grpc.binarylog.v1.Trailer.metadata:type_name -> grpc.binarylog.v1.Metadata + 9, // 12: grpc.binarylog.v1.Metadata.entry:type_name -> grpc.binarylog.v1.MetadataEntry + 2, // 13: grpc.binarylog.v1.Address.type:type_name -> grpc.binarylog.v1.Address.Type + 14, // [14:14] is the sub-list for method output_type + 14, // [14:14] is the sub-list for method input_type + 14, // [14:14] is the sub-list for extension type_name + 14, // [14:14] is the sub-list for extension extendee + 0, // [0:14] is the sub-list for field type_name +} + +func init() { file_grpc_binlog_v1_binarylog_proto_init() } +func file_grpc_binlog_v1_binarylog_proto_init() { + if File_grpc_binlog_v1_binarylog_proto != nil { + return + } + if !protoimpl.UnsafeEnabled { + file_grpc_binlog_v1_binarylog_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} { + switch v := v.(*GrpcLogEntry); i { + case 0: + return &v.state + case 1: + return &v.sizeCache + case 2: + return &v.unknownFields + default: + return nil + } + } + file_grpc_binlog_v1_binarylog_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} { + switch v := v.(*ClientHeader); i { + case 0: + return &v.state + case 1: + return &v.sizeCache + case 2: + return &v.unknownFields + default: + return nil + } + } + file_grpc_binlog_v1_binarylog_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} { + switch v := v.(*ServerHeader); i { + case 0: + return &v.state + case 1: + return &v.sizeCache + case 2: + return &v.unknownFields + default: + return nil + } + } + file_grpc_binlog_v1_binarylog_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} { + switch v := v.(*Trailer); i { + case 0: + return &v.state + case 1: + return &v.sizeCache + case 2: + return &v.unknownFields + default: + return nil + } + } + file_grpc_binlog_v1_binarylog_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} { + switch v := v.(*Message); i { + case 0: + return &v.state + case 1: + return &v.sizeCache + case 2: + return &v.unknownFields + default: + return nil + } + } + file_grpc_binlog_v1_binarylog_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} { + switch v := v.(*Metadata); i { + case 0: + return &v.state + case 1: + return &v.sizeCache + case 2: + return &v.unknownFields + default: + return nil + } + } + file_grpc_binlog_v1_binarylog_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} { + switch v := v.(*MetadataEntry); i { + case 0: + return &v.state + case 1: + return &v.sizeCache + case 2: + return &v.unknownFields + default: + return nil + } + } + file_grpc_binlog_v1_binarylog_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} { + switch v := v.(*Address); i { + case 0: + return &v.state + case 1: + return &v.sizeCache + case 2: + return &v.unknownFields + default: + return nil + } + } + } + file_grpc_binlog_v1_binarylog_proto_msgTypes[0].OneofWrappers = []interface{}{ + (*GrpcLogEntry_ClientHeader)(nil), + (*GrpcLogEntry_ServerHeader)(nil), + (*GrpcLogEntry_Message)(nil), + (*GrpcLogEntry_Trailer)(nil), + } + type x struct{} + out := protoimpl.TypeBuilder{ + File: protoimpl.DescBuilder{ + GoPackagePath: reflect.TypeOf(x{}).PkgPath(), + RawDescriptor: file_grpc_binlog_v1_binarylog_proto_rawDesc, + NumEnums: 3, + NumMessages: 8, + NumExtensions: 0, + NumServices: 0, + }, + GoTypes: file_grpc_binlog_v1_binarylog_proto_goTypes, + DependencyIndexes: file_grpc_binlog_v1_binarylog_proto_depIdxs, + EnumInfos: file_grpc_binlog_v1_binarylog_proto_enumTypes, + MessageInfos: file_grpc_binlog_v1_binarylog_proto_msgTypes, + }.Build() + File_grpc_binlog_v1_binarylog_proto = out.File + file_grpc_binlog_v1_binarylog_proto_rawDesc = nil + file_grpc_binlog_v1_binarylog_proto_goTypes = nil + file_grpc_binlog_v1_binarylog_proto_depIdxs = nil +} diff --git a/vendor/google.golang.org/grpc/call.go b/vendor/google.golang.org/grpc/call.go new file mode 100644 index 000000000..9e20e4d38 --- /dev/null +++ b/vendor/google.golang.org/grpc/call.go @@ -0,0 +1,74 @@ +/* + * + * Copyright 2014 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpc + +import ( + "context" +) + +// Invoke sends the RPC request on the wire and returns after response is +// received. This is typically called by generated code. +// +// All errors returned by Invoke are compatible with the status package. +func (cc *ClientConn) Invoke(ctx context.Context, method string, args, reply interface{}, opts ...CallOption) error { + // allow interceptor to see all applicable call options, which means those + // configured as defaults from dial option as well as per-call options + opts = combine(cc.dopts.callOptions, opts) + + if cc.dopts.unaryInt != nil { + return cc.dopts.unaryInt(ctx, method, args, reply, cc, invoke, opts...) + } + return invoke(ctx, method, args, reply, cc, opts...) +} + +func combine(o1 []CallOption, o2 []CallOption) []CallOption { + // we don't use append because o1 could have extra capacity whose + // elements would be overwritten, which could cause inadvertent + // sharing (and race conditions) between concurrent calls + if len(o1) == 0 { + return o2 + } else if len(o2) == 0 { + return o1 + } + ret := make([]CallOption, len(o1)+len(o2)) + copy(ret, o1) + copy(ret[len(o1):], o2) + return ret +} + +// Invoke sends the RPC request on the wire and returns after response is +// received. This is typically called by generated code. +// +// DEPRECATED: Use ClientConn.Invoke instead. +func Invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) error { + return cc.Invoke(ctx, method, args, reply, opts...) +} + +var unaryStreamDesc = &StreamDesc{ServerStreams: false, ClientStreams: false} + +func invoke(ctx context.Context, method string, req, reply interface{}, cc *ClientConn, opts ...CallOption) error { + cs, err := newClientStream(ctx, unaryStreamDesc, cc, method, opts...) + if err != nil { + return err + } + if err := cs.SendMsg(req); err != nil { + return err + } + return cs.RecvMsg(reply) +} diff --git a/vendor/google.golang.org/grpc/clientconn.go b/vendor/google.golang.org/grpc/clientconn.go new file mode 100644 index 000000000..cbd671a85 --- /dev/null +++ b/vendor/google.golang.org/grpc/clientconn.go @@ -0,0 +1,1571 @@ +/* + * + * Copyright 2014 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpc + +import ( + "context" + "errors" + "fmt" + "math" + "net" + "reflect" + "strings" + "sync" + "sync/atomic" + "time" + + "google.golang.org/grpc/balancer" + "google.golang.org/grpc/balancer/base" + "google.golang.org/grpc/codes" + "google.golang.org/grpc/connectivity" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/internal/backoff" + "google.golang.org/grpc/internal/channelz" + "google.golang.org/grpc/internal/grpcsync" + "google.golang.org/grpc/internal/grpcutil" + "google.golang.org/grpc/internal/transport" + "google.golang.org/grpc/keepalive" + "google.golang.org/grpc/resolver" + "google.golang.org/grpc/serviceconfig" + "google.golang.org/grpc/status" + + _ "google.golang.org/grpc/balancer/roundrobin" // To register roundrobin. + _ "google.golang.org/grpc/internal/resolver/dns" // To register dns resolver. + _ "google.golang.org/grpc/internal/resolver/passthrough" // To register passthrough resolver. +) + +const ( + // minimum time to give a connection to complete + minConnectTimeout = 20 * time.Second + // must match grpclbName in grpclb/grpclb.go + grpclbName = "grpclb" +) + +var ( + // ErrClientConnClosing indicates that the operation is illegal because + // the ClientConn is closing. + // + // Deprecated: this error should not be relied upon by users; use the status + // code of Canceled instead. + ErrClientConnClosing = status.Error(codes.Canceled, "grpc: the client connection is closing") + // errConnDrain indicates that the connection starts to be drained and does not accept any new RPCs. + errConnDrain = errors.New("grpc: the connection is drained") + // errConnClosing indicates that the connection is closing. + errConnClosing = errors.New("grpc: the connection is closing") + // invalidDefaultServiceConfigErrPrefix is used to prefix the json parsing error for the default + // service config. + invalidDefaultServiceConfigErrPrefix = "grpc: the provided default service config is invalid" +) + +// The following errors are returned from Dial and DialContext +var ( + // errNoTransportSecurity indicates that there is no transport security + // being set for ClientConn. Users should either set one or explicitly + // call WithInsecure DialOption to disable security. + errNoTransportSecurity = errors.New("grpc: no transport security set (use grpc.WithInsecure() explicitly or set credentials)") + // errTransportCredsAndBundle indicates that creds bundle is used together + // with other individual Transport Credentials. + errTransportCredsAndBundle = errors.New("grpc: credentials.Bundle may not be used with individual TransportCredentials") + // errTransportCredentialsMissing indicates that users want to transmit security + // information (e.g., OAuth2 token) which requires secure connection on an insecure + // connection. + errTransportCredentialsMissing = errors.New("grpc: the credentials require transport level security (use grpc.WithTransportCredentials() to set)") + // errCredentialsConflict indicates that grpc.WithTransportCredentials() + // and grpc.WithInsecure() are both called for a connection. + errCredentialsConflict = errors.New("grpc: transport credentials are set for an insecure connection (grpc.WithTransportCredentials() and grpc.WithInsecure() are both called)") +) + +const ( + defaultClientMaxReceiveMessageSize = 1024 * 1024 * 4 + defaultClientMaxSendMessageSize = math.MaxInt32 + // http2IOBufSize specifies the buffer size for sending frames. + defaultWriteBufSize = 32 * 1024 + defaultReadBufSize = 32 * 1024 +) + +// Dial creates a client connection to the given target. +func Dial(target string, opts ...DialOption) (*ClientConn, error) { + return DialContext(context.Background(), target, opts...) +} + +// DialContext creates a client connection to the given target. By default, it's +// a non-blocking dial (the function won't wait for connections to be +// established, and connecting happens in the background). To make it a blocking +// dial, use WithBlock() dial option. +// +// In the non-blocking case, the ctx does not act against the connection. It +// only controls the setup steps. +// +// In the blocking case, ctx can be used to cancel or expire the pending +// connection. Once this function returns, the cancellation and expiration of +// ctx will be noop. Users should call ClientConn.Close to terminate all the +// pending operations after this function returns. +// +// The target name syntax is defined in +// https://github.com/grpc/grpc/blob/master/doc/naming.md. +// e.g. to use dns resolver, a "dns:///" prefix should be applied to the target. +func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *ClientConn, err error) { + cc := &ClientConn{ + target: target, + csMgr: &connectivityStateManager{}, + conns: make(map[*addrConn]struct{}), + dopts: defaultDialOptions(), + blockingpicker: newPickerWrapper(), + czData: new(channelzData), + firstResolveEvent: grpcsync.NewEvent(), + } + cc.retryThrottler.Store((*retryThrottler)(nil)) + cc.ctx, cc.cancel = context.WithCancel(context.Background()) + + for _, opt := range opts { + opt.apply(&cc.dopts) + } + + chainUnaryClientInterceptors(cc) + chainStreamClientInterceptors(cc) + + defer func() { + if err != nil { + cc.Close() + } + }() + + if channelz.IsOn() { + if cc.dopts.channelzParentID != 0 { + cc.channelzID = channelz.RegisterChannel(&channelzChannel{cc}, cc.dopts.channelzParentID, target) + channelz.AddTraceEvent(logger, cc.channelzID, 0, &channelz.TraceEventDesc{ + Desc: "Channel Created", + Severity: channelz.CtInfo, + Parent: &channelz.TraceEventDesc{ + Desc: fmt.Sprintf("Nested Channel(id:%d) created", cc.channelzID), + Severity: channelz.CtInfo, + }, + }) + } else { + cc.channelzID = channelz.RegisterChannel(&channelzChannel{cc}, 0, target) + channelz.Info(logger, cc.channelzID, "Channel Created") + } + cc.csMgr.channelzID = cc.channelzID + } + + if !cc.dopts.insecure { + if cc.dopts.copts.TransportCredentials == nil && cc.dopts.copts.CredsBundle == nil { + return nil, errNoTransportSecurity + } + if cc.dopts.copts.TransportCredentials != nil && cc.dopts.copts.CredsBundle != nil { + return nil, errTransportCredsAndBundle + } + } else { + if cc.dopts.copts.TransportCredentials != nil || cc.dopts.copts.CredsBundle != nil { + return nil, errCredentialsConflict + } + for _, cd := range cc.dopts.copts.PerRPCCredentials { + if cd.RequireTransportSecurity() { + return nil, errTransportCredentialsMissing + } + } + } + + if cc.dopts.defaultServiceConfigRawJSON != nil { + scpr := parseServiceConfig(*cc.dopts.defaultServiceConfigRawJSON) + if scpr.Err != nil { + return nil, fmt.Errorf("%s: %v", invalidDefaultServiceConfigErrPrefix, scpr.Err) + } + cc.dopts.defaultServiceConfig, _ = scpr.Config.(*ServiceConfig) + } + cc.mkp = cc.dopts.copts.KeepaliveParams + + if cc.dopts.copts.Dialer == nil { + cc.dopts.copts.Dialer = func(ctx context.Context, addr string) (net.Conn, error) { + network, addr := parseDialTarget(addr) + return (&net.Dialer{}).DialContext(ctx, network, addr) + } + if cc.dopts.withProxy { + cc.dopts.copts.Dialer = newProxyDialer(cc.dopts.copts.Dialer) + } + } + + if cc.dopts.copts.UserAgent != "" { + cc.dopts.copts.UserAgent += " " + grpcUA + } else { + cc.dopts.copts.UserAgent = grpcUA + } + + if cc.dopts.timeout > 0 { + var cancel context.CancelFunc + ctx, cancel = context.WithTimeout(ctx, cc.dopts.timeout) + defer cancel() + } + defer func() { + select { + case <-ctx.Done(): + switch { + case ctx.Err() == err: + conn = nil + case err == nil || !cc.dopts.returnLastError: + conn, err = nil, ctx.Err() + default: + conn, err = nil, fmt.Errorf("%v: %v", ctx.Err(), err) + } + default: + } + }() + + scSet := false + if cc.dopts.scChan != nil { + // Try to get an initial service config. + select { + case sc, ok := <-cc.dopts.scChan: + if ok { + cc.sc = &sc + scSet = true + } + default: + } + } + if cc.dopts.bs == nil { + cc.dopts.bs = backoff.DefaultExponential + } + + // Determine the resolver to use. + cc.parsedTarget = grpcutil.ParseTarget(cc.target) + unixScheme := strings.HasPrefix(cc.target, "unix:") + channelz.Infof(logger, cc.channelzID, "parsed scheme: %q", cc.parsedTarget.Scheme) + resolverBuilder := cc.getResolver(cc.parsedTarget.Scheme) + if resolverBuilder == nil { + // If resolver builder is still nil, the parsed target's scheme is + // not registered. Fallback to default resolver and set Endpoint to + // the original target. + channelz.Infof(logger, cc.channelzID, "scheme %q not registered, fallback to default scheme", cc.parsedTarget.Scheme) + cc.parsedTarget = resolver.Target{ + Scheme: resolver.GetDefaultScheme(), + Endpoint: target, + } + resolverBuilder = cc.getResolver(cc.parsedTarget.Scheme) + if resolverBuilder == nil { + return nil, fmt.Errorf("could not get resolver for default scheme: %q", cc.parsedTarget.Scheme) + } + } + + creds := cc.dopts.copts.TransportCredentials + if creds != nil && creds.Info().ServerName != "" { + cc.authority = creds.Info().ServerName + } else if cc.dopts.insecure && cc.dopts.authority != "" { + cc.authority = cc.dopts.authority + } else if unixScheme { + cc.authority = "localhost" + } else { + // Use endpoint from "scheme://authority/endpoint" as the default + // authority for ClientConn. + cc.authority = cc.parsedTarget.Endpoint + } + + if cc.dopts.scChan != nil && !scSet { + // Blocking wait for the initial service config. + select { + case sc, ok := <-cc.dopts.scChan: + if ok { + cc.sc = &sc + } + case <-ctx.Done(): + return nil, ctx.Err() + } + } + if cc.dopts.scChan != nil { + go cc.scWatcher() + } + + var credsClone credentials.TransportCredentials + if creds := cc.dopts.copts.TransportCredentials; creds != nil { + credsClone = creds.Clone() + } + cc.balancerBuildOpts = balancer.BuildOptions{ + DialCreds: credsClone, + CredsBundle: cc.dopts.copts.CredsBundle, + Dialer: cc.dopts.copts.Dialer, + ChannelzParentID: cc.channelzID, + Target: cc.parsedTarget, + } + + // Build the resolver. + rWrapper, err := newCCResolverWrapper(cc, resolverBuilder) + if err != nil { + return nil, fmt.Errorf("failed to build resolver: %v", err) + } + cc.mu.Lock() + cc.resolverWrapper = rWrapper + cc.mu.Unlock() + + // A blocking dial blocks until the clientConn is ready. + if cc.dopts.block { + for { + s := cc.GetState() + if s == connectivity.Ready { + break + } else if cc.dopts.copts.FailOnNonTempDialError && s == connectivity.TransientFailure { + if err = cc.connectionError(); err != nil { + terr, ok := err.(interface { + Temporary() bool + }) + if ok && !terr.Temporary() { + return nil, err + } + } + } + if !cc.WaitForStateChange(ctx, s) { + // ctx got timeout or canceled. + if err = cc.connectionError(); err != nil && cc.dopts.returnLastError { + return nil, err + } + return nil, ctx.Err() + } + } + } + + return cc, nil +} + +// chainUnaryClientInterceptors chains all unary client interceptors into one. +func chainUnaryClientInterceptors(cc *ClientConn) { + interceptors := cc.dopts.chainUnaryInts + // Prepend dopts.unaryInt to the chaining interceptors if it exists, since unaryInt will + // be executed before any other chained interceptors. + if cc.dopts.unaryInt != nil { + interceptors = append([]UnaryClientInterceptor{cc.dopts.unaryInt}, interceptors...) + } + var chainedInt UnaryClientInterceptor + if len(interceptors) == 0 { + chainedInt = nil + } else if len(interceptors) == 1 { + chainedInt = interceptors[0] + } else { + chainedInt = func(ctx context.Context, method string, req, reply interface{}, cc *ClientConn, invoker UnaryInvoker, opts ...CallOption) error { + return interceptors[0](ctx, method, req, reply, cc, getChainUnaryInvoker(interceptors, 0, invoker), opts...) + } + } + cc.dopts.unaryInt = chainedInt +} + +// getChainUnaryInvoker recursively generate the chained unary invoker. +func getChainUnaryInvoker(interceptors []UnaryClientInterceptor, curr int, finalInvoker UnaryInvoker) UnaryInvoker { + if curr == len(interceptors)-1 { + return finalInvoker + } + return func(ctx context.Context, method string, req, reply interface{}, cc *ClientConn, opts ...CallOption) error { + return interceptors[curr+1](ctx, method, req, reply, cc, getChainUnaryInvoker(interceptors, curr+1, finalInvoker), opts...) + } +} + +// chainStreamClientInterceptors chains all stream client interceptors into one. +func chainStreamClientInterceptors(cc *ClientConn) { + interceptors := cc.dopts.chainStreamInts + // Prepend dopts.streamInt to the chaining interceptors if it exists, since streamInt will + // be executed before any other chained interceptors. + if cc.dopts.streamInt != nil { + interceptors = append([]StreamClientInterceptor{cc.dopts.streamInt}, interceptors...) + } + var chainedInt StreamClientInterceptor + if len(interceptors) == 0 { + chainedInt = nil + } else if len(interceptors) == 1 { + chainedInt = interceptors[0] + } else { + chainedInt = func(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, streamer Streamer, opts ...CallOption) (ClientStream, error) { + return interceptors[0](ctx, desc, cc, method, getChainStreamer(interceptors, 0, streamer), opts...) + } + } + cc.dopts.streamInt = chainedInt +} + +// getChainStreamer recursively generate the chained client stream constructor. +func getChainStreamer(interceptors []StreamClientInterceptor, curr int, finalStreamer Streamer) Streamer { + if curr == len(interceptors)-1 { + return finalStreamer + } + return func(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (ClientStream, error) { + return interceptors[curr+1](ctx, desc, cc, method, getChainStreamer(interceptors, curr+1, finalStreamer), opts...) + } +} + +// connectivityStateManager keeps the connectivity.State of ClientConn. +// This struct will eventually be exported so the balancers can access it. +type connectivityStateManager struct { + mu sync.Mutex + state connectivity.State + notifyChan chan struct{} + channelzID int64 +} + +// updateState updates the connectivity.State of ClientConn. +// If there's a change it notifies goroutines waiting on state change to +// happen. +func (csm *connectivityStateManager) updateState(state connectivity.State) { + csm.mu.Lock() + defer csm.mu.Unlock() + if csm.state == connectivity.Shutdown { + return + } + if csm.state == state { + return + } + csm.state = state + channelz.Infof(logger, csm.channelzID, "Channel Connectivity change to %v", state) + if csm.notifyChan != nil { + // There are other goroutines waiting on this channel. + close(csm.notifyChan) + csm.notifyChan = nil + } +} + +func (csm *connectivityStateManager) getState() connectivity.State { + csm.mu.Lock() + defer csm.mu.Unlock() + return csm.state +} + +func (csm *connectivityStateManager) getNotifyChan() <-chan struct{} { + csm.mu.Lock() + defer csm.mu.Unlock() + if csm.notifyChan == nil { + csm.notifyChan = make(chan struct{}) + } + return csm.notifyChan +} + +// ClientConnInterface defines the functions clients need to perform unary and +// streaming RPCs. It is implemented by *ClientConn, and is only intended to +// be referenced by generated code. +type ClientConnInterface interface { + // Invoke performs a unary RPC and returns after the response is received + // into reply. + Invoke(ctx context.Context, method string, args interface{}, reply interface{}, opts ...CallOption) error + // NewStream begins a streaming RPC. + NewStream(ctx context.Context, desc *StreamDesc, method string, opts ...CallOption) (ClientStream, error) +} + +// Assert *ClientConn implements ClientConnInterface. +var _ ClientConnInterface = (*ClientConn)(nil) + +// ClientConn represents a virtual connection to a conceptual endpoint, to +// perform RPCs. +// +// A ClientConn is free to have zero or more actual connections to the endpoint +// based on configuration, load, etc. It is also free to determine which actual +// endpoints to use and may change it every RPC, permitting client-side load +// balancing. +// +// A ClientConn encapsulates a range of functionality including name +// resolution, TCP connection establishment (with retries and backoff) and TLS +// handshakes. It also handles errors on established connections by +// re-resolving the name and reconnecting. +type ClientConn struct { + ctx context.Context + cancel context.CancelFunc + + target string + parsedTarget resolver.Target + authority string + dopts dialOptions + csMgr *connectivityStateManager + + balancerBuildOpts balancer.BuildOptions + blockingpicker *pickerWrapper + + mu sync.RWMutex + resolverWrapper *ccResolverWrapper + sc *ServiceConfig + conns map[*addrConn]struct{} + // Keepalive parameter can be updated if a GoAway is received. + mkp keepalive.ClientParameters + curBalancerName string + balancerWrapper *ccBalancerWrapper + retryThrottler atomic.Value + + firstResolveEvent *grpcsync.Event + + channelzID int64 // channelz unique identification number + czData *channelzData + + lceMu sync.Mutex // protects lastConnectionError + lastConnectionError error +} + +// WaitForStateChange waits until the connectivity.State of ClientConn changes from sourceState or +// ctx expires. A true value is returned in former case and false in latter. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func (cc *ClientConn) WaitForStateChange(ctx context.Context, sourceState connectivity.State) bool { + ch := cc.csMgr.getNotifyChan() + if cc.csMgr.getState() != sourceState { + return true + } + select { + case <-ctx.Done(): + return false + case <-ch: + return true + } +} + +// GetState returns the connectivity.State of ClientConn. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func (cc *ClientConn) GetState() connectivity.State { + return cc.csMgr.getState() +} + +func (cc *ClientConn) scWatcher() { + for { + select { + case sc, ok := <-cc.dopts.scChan: + if !ok { + return + } + cc.mu.Lock() + // TODO: load balance policy runtime change is ignored. + // We may revisit this decision in the future. + cc.sc = &sc + cc.mu.Unlock() + case <-cc.ctx.Done(): + return + } + } +} + +// waitForResolvedAddrs blocks until the resolver has provided addresses or the +// context expires. Returns nil unless the context expires first; otherwise +// returns a status error based on the context. +func (cc *ClientConn) waitForResolvedAddrs(ctx context.Context) error { + // This is on the RPC path, so we use a fast path to avoid the + // more-expensive "select" below after the resolver has returned once. + if cc.firstResolveEvent.HasFired() { + return nil + } + select { + case <-cc.firstResolveEvent.Done(): + return nil + case <-ctx.Done(): + return status.FromContextError(ctx.Err()).Err() + case <-cc.ctx.Done(): + return ErrClientConnClosing + } +} + +var emptyServiceConfig *ServiceConfig + +func init() { + cfg := parseServiceConfig("{}") + if cfg.Err != nil { + panic(fmt.Sprintf("impossible error parsing empty service config: %v", cfg.Err)) + } + emptyServiceConfig = cfg.Config.(*ServiceConfig) +} + +func (cc *ClientConn) maybeApplyDefaultServiceConfig(addrs []resolver.Address) { + if cc.sc != nil { + cc.applyServiceConfigAndBalancer(cc.sc, addrs) + return + } + if cc.dopts.defaultServiceConfig != nil { + cc.applyServiceConfigAndBalancer(cc.dopts.defaultServiceConfig, addrs) + } else { + cc.applyServiceConfigAndBalancer(emptyServiceConfig, addrs) + } +} + +func (cc *ClientConn) updateResolverState(s resolver.State, err error) error { + defer cc.firstResolveEvent.Fire() + cc.mu.Lock() + // Check if the ClientConn is already closed. Some fields (e.g. + // balancerWrapper) are set to nil when closing the ClientConn, and could + // cause nil pointer panic if we don't have this check. + if cc.conns == nil { + cc.mu.Unlock() + return nil + } + + if err != nil { + // May need to apply the initial service config in case the resolver + // doesn't support service configs, or doesn't provide a service config + // with the new addresses. + cc.maybeApplyDefaultServiceConfig(nil) + + if cc.balancerWrapper != nil { + cc.balancerWrapper.resolverError(err) + } + + // No addresses are valid with err set; return early. + cc.mu.Unlock() + return balancer.ErrBadResolverState + } + + var ret error + if cc.dopts.disableServiceConfig || s.ServiceConfig == nil { + cc.maybeApplyDefaultServiceConfig(s.Addresses) + // TODO: do we need to apply a failing LB policy if there is no + // default, per the error handling design? + } else { + if sc, ok := s.ServiceConfig.Config.(*ServiceConfig); s.ServiceConfig.Err == nil && ok { + cc.applyServiceConfigAndBalancer(sc, s.Addresses) + } else { + ret = balancer.ErrBadResolverState + if cc.balancerWrapper == nil { + var err error + if s.ServiceConfig.Err != nil { + err = status.Errorf(codes.Unavailable, "error parsing service config: %v", s.ServiceConfig.Err) + } else { + err = status.Errorf(codes.Unavailable, "illegal service config type: %T", s.ServiceConfig.Config) + } + cc.blockingpicker.updatePicker(base.NewErrPicker(err)) + cc.csMgr.updateState(connectivity.TransientFailure) + cc.mu.Unlock() + return ret + } + } + } + + var balCfg serviceconfig.LoadBalancingConfig + if cc.dopts.balancerBuilder == nil && cc.sc != nil && cc.sc.lbConfig != nil { + balCfg = cc.sc.lbConfig.cfg + } + + cbn := cc.curBalancerName + bw := cc.balancerWrapper + cc.mu.Unlock() + if cbn != grpclbName { + // Filter any grpclb addresses since we don't have the grpclb balancer. + for i := 0; i < len(s.Addresses); { + if s.Addresses[i].Type == resolver.GRPCLB { + copy(s.Addresses[i:], s.Addresses[i+1:]) + s.Addresses = s.Addresses[:len(s.Addresses)-1] + continue + } + i++ + } + } + uccsErr := bw.updateClientConnState(&balancer.ClientConnState{ResolverState: s, BalancerConfig: balCfg}) + if ret == nil { + ret = uccsErr // prefer ErrBadResolver state since any other error is + // currently meaningless to the caller. + } + return ret +} + +// switchBalancer starts the switching from current balancer to the balancer +// with the given name. +// +// It will NOT send the current address list to the new balancer. If needed, +// caller of this function should send address list to the new balancer after +// this function returns. +// +// Caller must hold cc.mu. +func (cc *ClientConn) switchBalancer(name string) { + if strings.EqualFold(cc.curBalancerName, name) { + return + } + + channelz.Infof(logger, cc.channelzID, "ClientConn switching balancer to %q", name) + if cc.dopts.balancerBuilder != nil { + channelz.Info(logger, cc.channelzID, "ignoring balancer switching: Balancer DialOption used instead") + return + } + if cc.balancerWrapper != nil { + cc.balancerWrapper.close() + } + + builder := balancer.Get(name) + if builder == nil { + channelz.Warningf(logger, cc.channelzID, "Channel switches to new LB policy %q due to fallback from invalid balancer name", PickFirstBalancerName) + channelz.Infof(logger, cc.channelzID, "failed to get balancer builder for: %v, using pick_first instead", name) + builder = newPickfirstBuilder() + } else { + channelz.Infof(logger, cc.channelzID, "Channel switches to new LB policy %q", name) + } + + cc.curBalancerName = builder.Name() + cc.balancerWrapper = newCCBalancerWrapper(cc, builder, cc.balancerBuildOpts) +} + +func (cc *ClientConn) handleSubConnStateChange(sc balancer.SubConn, s connectivity.State, err error) { + cc.mu.Lock() + if cc.conns == nil { + cc.mu.Unlock() + return + } + // TODO(bar switching) send updates to all balancer wrappers when balancer + // gracefully switching is supported. + cc.balancerWrapper.handleSubConnStateChange(sc, s, err) + cc.mu.Unlock() +} + +// newAddrConn creates an addrConn for addrs and adds it to cc.conns. +// +// Caller needs to make sure len(addrs) > 0. +func (cc *ClientConn) newAddrConn(addrs []resolver.Address, opts balancer.NewSubConnOptions) (*addrConn, error) { + ac := &addrConn{ + state: connectivity.Idle, + cc: cc, + addrs: addrs, + scopts: opts, + dopts: cc.dopts, + czData: new(channelzData), + resetBackoff: make(chan struct{}), + } + ac.ctx, ac.cancel = context.WithCancel(cc.ctx) + // Track ac in cc. This needs to be done before any getTransport(...) is called. + cc.mu.Lock() + if cc.conns == nil { + cc.mu.Unlock() + return nil, ErrClientConnClosing + } + if channelz.IsOn() { + ac.channelzID = channelz.RegisterSubChannel(ac, cc.channelzID, "") + channelz.AddTraceEvent(logger, ac.channelzID, 0, &channelz.TraceEventDesc{ + Desc: "Subchannel Created", + Severity: channelz.CtInfo, + Parent: &channelz.TraceEventDesc{ + Desc: fmt.Sprintf("Subchannel(id:%d) created", ac.channelzID), + Severity: channelz.CtInfo, + }, + }) + } + cc.conns[ac] = struct{}{} + cc.mu.Unlock() + return ac, nil +} + +// removeAddrConn removes the addrConn in the subConn from clientConn. +// It also tears down the ac with the given error. +func (cc *ClientConn) removeAddrConn(ac *addrConn, err error) { + cc.mu.Lock() + if cc.conns == nil { + cc.mu.Unlock() + return + } + delete(cc.conns, ac) + cc.mu.Unlock() + ac.tearDown(err) +} + +func (cc *ClientConn) channelzMetric() *channelz.ChannelInternalMetric { + return &channelz.ChannelInternalMetric{ + State: cc.GetState(), + Target: cc.target, + CallsStarted: atomic.LoadInt64(&cc.czData.callsStarted), + CallsSucceeded: atomic.LoadInt64(&cc.czData.callsSucceeded), + CallsFailed: atomic.LoadInt64(&cc.czData.callsFailed), + LastCallStartedTimestamp: time.Unix(0, atomic.LoadInt64(&cc.czData.lastCallStartedTime)), + } +} + +// Target returns the target string of the ClientConn. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func (cc *ClientConn) Target() string { + return cc.target +} + +func (cc *ClientConn) incrCallsStarted() { + atomic.AddInt64(&cc.czData.callsStarted, 1) + atomic.StoreInt64(&cc.czData.lastCallStartedTime, time.Now().UnixNano()) +} + +func (cc *ClientConn) incrCallsSucceeded() { + atomic.AddInt64(&cc.czData.callsSucceeded, 1) +} + +func (cc *ClientConn) incrCallsFailed() { + atomic.AddInt64(&cc.czData.callsFailed, 1) +} + +// connect starts creating a transport. +// It does nothing if the ac is not IDLE. +// TODO(bar) Move this to the addrConn section. +func (ac *addrConn) connect() error { + ac.mu.Lock() + if ac.state == connectivity.Shutdown { + ac.mu.Unlock() + return errConnClosing + } + if ac.state != connectivity.Idle { + ac.mu.Unlock() + return nil + } + // Update connectivity state within the lock to prevent subsequent or + // concurrent calls from resetting the transport more than once. + ac.updateConnectivityState(connectivity.Connecting, nil) + ac.mu.Unlock() + + // Start a goroutine connecting to the server asynchronously. + go ac.resetTransport() + return nil +} + +// tryUpdateAddrs tries to update ac.addrs with the new addresses list. +// +// If ac is Connecting, it returns false. The caller should tear down the ac and +// create a new one. Note that the backoff will be reset when this happens. +// +// If ac is TransientFailure, it updates ac.addrs and returns true. The updated +// addresses will be picked up by retry in the next iteration after backoff. +// +// If ac is Shutdown or Idle, it updates ac.addrs and returns true. +// +// If ac is Ready, it checks whether current connected address of ac is in the +// new addrs list. +// - If true, it updates ac.addrs and returns true. The ac will keep using +// the existing connection. +// - If false, it does nothing and returns false. +func (ac *addrConn) tryUpdateAddrs(addrs []resolver.Address) bool { + ac.mu.Lock() + defer ac.mu.Unlock() + channelz.Infof(logger, ac.channelzID, "addrConn: tryUpdateAddrs curAddr: %v, addrs: %v", ac.curAddr, addrs) + if ac.state == connectivity.Shutdown || + ac.state == connectivity.TransientFailure || + ac.state == connectivity.Idle { + ac.addrs = addrs + return true + } + + if ac.state == connectivity.Connecting { + return false + } + + // ac.state is Ready, try to find the connected address. + var curAddrFound bool + for _, a := range addrs { + if reflect.DeepEqual(ac.curAddr, a) { + curAddrFound = true + break + } + } + channelz.Infof(logger, ac.channelzID, "addrConn: tryUpdateAddrs curAddrFound: %v", curAddrFound) + if curAddrFound { + ac.addrs = addrs + } + + return curAddrFound +} + +// GetMethodConfig gets the method config of the input method. +// If there's an exact match for input method (i.e. /service/method), we return +// the corresponding MethodConfig. +// If there isn't an exact match for the input method, we look for the service's default +// config under the service (i.e /service/) and then for the default for all services (empty string). +// +// If there is a default MethodConfig for the service, we return it. +// Otherwise, we return an empty MethodConfig. +func (cc *ClientConn) GetMethodConfig(method string) MethodConfig { + // TODO: Avoid the locking here. + cc.mu.RLock() + defer cc.mu.RUnlock() + if cc.sc == nil { + return MethodConfig{} + } + if m, ok := cc.sc.Methods[method]; ok { + return m + } + i := strings.LastIndex(method, "/") + if m, ok := cc.sc.Methods[method[:i+1]]; ok { + return m + } + return cc.sc.Methods[""] +} + +func (cc *ClientConn) healthCheckConfig() *healthCheckConfig { + cc.mu.RLock() + defer cc.mu.RUnlock() + if cc.sc == nil { + return nil + } + return cc.sc.healthCheckConfig +} + +func (cc *ClientConn) getTransport(ctx context.Context, failfast bool, method string) (transport.ClientTransport, func(balancer.DoneInfo), error) { + t, done, err := cc.blockingpicker.pick(ctx, failfast, balancer.PickInfo{ + Ctx: ctx, + FullMethodName: method, + }) + if err != nil { + return nil, nil, toRPCErr(err) + } + return t, done, nil +} + +func (cc *ClientConn) applyServiceConfigAndBalancer(sc *ServiceConfig, addrs []resolver.Address) { + if sc == nil { + // should never reach here. + return + } + cc.sc = sc + + if cc.sc.retryThrottling != nil { + newThrottler := &retryThrottler{ + tokens: cc.sc.retryThrottling.MaxTokens, + max: cc.sc.retryThrottling.MaxTokens, + thresh: cc.sc.retryThrottling.MaxTokens / 2, + ratio: cc.sc.retryThrottling.TokenRatio, + } + cc.retryThrottler.Store(newThrottler) + } else { + cc.retryThrottler.Store((*retryThrottler)(nil)) + } + + if cc.dopts.balancerBuilder == nil { + // Only look at balancer types and switch balancer if balancer dial + // option is not set. + var newBalancerName string + if cc.sc != nil && cc.sc.lbConfig != nil { + newBalancerName = cc.sc.lbConfig.name + } else { + var isGRPCLB bool + for _, a := range addrs { + if a.Type == resolver.GRPCLB { + isGRPCLB = true + break + } + } + if isGRPCLB { + newBalancerName = grpclbName + } else if cc.sc != nil && cc.sc.LB != nil { + newBalancerName = *cc.sc.LB + } else { + newBalancerName = PickFirstBalancerName + } + } + cc.switchBalancer(newBalancerName) + } else if cc.balancerWrapper == nil { + // Balancer dial option was set, and this is the first time handling + // resolved addresses. Build a balancer with dopts.balancerBuilder. + cc.curBalancerName = cc.dopts.balancerBuilder.Name() + cc.balancerWrapper = newCCBalancerWrapper(cc, cc.dopts.balancerBuilder, cc.balancerBuildOpts) + } +} + +func (cc *ClientConn) resolveNow(o resolver.ResolveNowOptions) { + cc.mu.RLock() + r := cc.resolverWrapper + cc.mu.RUnlock() + if r == nil { + return + } + go r.resolveNow(o) +} + +// ResetConnectBackoff wakes up all subchannels in transient failure and causes +// them to attempt another connection immediately. It also resets the backoff +// times used for subsequent attempts regardless of the current state. +// +// In general, this function should not be used. Typical service or network +// outages result in a reasonable client reconnection strategy by default. +// However, if a previously unavailable network becomes available, this may be +// used to trigger an immediate reconnect. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func (cc *ClientConn) ResetConnectBackoff() { + cc.mu.Lock() + conns := cc.conns + cc.mu.Unlock() + for ac := range conns { + ac.resetConnectBackoff() + } +} + +// Close tears down the ClientConn and all underlying connections. +func (cc *ClientConn) Close() error { + defer cc.cancel() + + cc.mu.Lock() + if cc.conns == nil { + cc.mu.Unlock() + return ErrClientConnClosing + } + conns := cc.conns + cc.conns = nil + cc.csMgr.updateState(connectivity.Shutdown) + + rWrapper := cc.resolverWrapper + cc.resolverWrapper = nil + bWrapper := cc.balancerWrapper + cc.balancerWrapper = nil + cc.mu.Unlock() + + cc.blockingpicker.close() + + if rWrapper != nil { + rWrapper.close() + } + if bWrapper != nil { + bWrapper.close() + } + + for ac := range conns { + ac.tearDown(ErrClientConnClosing) + } + if channelz.IsOn() { + ted := &channelz.TraceEventDesc{ + Desc: "Channel Deleted", + Severity: channelz.CtInfo, + } + if cc.dopts.channelzParentID != 0 { + ted.Parent = &channelz.TraceEventDesc{ + Desc: fmt.Sprintf("Nested channel(id:%d) deleted", cc.channelzID), + Severity: channelz.CtInfo, + } + } + channelz.AddTraceEvent(logger, cc.channelzID, 0, ted) + // TraceEvent needs to be called before RemoveEntry, as TraceEvent may add trace reference to + // the entity being deleted, and thus prevent it from being deleted right away. + channelz.RemoveEntry(cc.channelzID) + } + return nil +} + +// addrConn is a network connection to a given address. +type addrConn struct { + ctx context.Context + cancel context.CancelFunc + + cc *ClientConn + dopts dialOptions + acbw balancer.SubConn + scopts balancer.NewSubConnOptions + + // transport is set when there's a viable transport (note: ac state may not be READY as LB channel + // health checking may require server to report healthy to set ac to READY), and is reset + // to nil when the current transport should no longer be used to create a stream (e.g. after GoAway + // is received, transport is closed, ac has been torn down). + transport transport.ClientTransport // The current transport. + + mu sync.Mutex + curAddr resolver.Address // The current address. + addrs []resolver.Address // All addresses that the resolver resolved to. + + // Use updateConnectivityState for updating addrConn's connectivity state. + state connectivity.State + + backoffIdx int // Needs to be stateful for resetConnectBackoff. + resetBackoff chan struct{} + + channelzID int64 // channelz unique identification number. + czData *channelzData +} + +// Note: this requires a lock on ac.mu. +func (ac *addrConn) updateConnectivityState(s connectivity.State, lastErr error) { + if ac.state == s { + return + } + ac.state = s + channelz.Infof(logger, ac.channelzID, "Subchannel Connectivity change to %v", s) + ac.cc.handleSubConnStateChange(ac.acbw, s, lastErr) +} + +// adjustParams updates parameters used to create transports upon +// receiving a GoAway. +func (ac *addrConn) adjustParams(r transport.GoAwayReason) { + switch r { + case transport.GoAwayTooManyPings: + v := 2 * ac.dopts.copts.KeepaliveParams.Time + ac.cc.mu.Lock() + if v > ac.cc.mkp.Time { + ac.cc.mkp.Time = v + } + ac.cc.mu.Unlock() + } +} + +func (ac *addrConn) resetTransport() { + for i := 0; ; i++ { + if i > 0 { + ac.cc.resolveNow(resolver.ResolveNowOptions{}) + } + + ac.mu.Lock() + if ac.state == connectivity.Shutdown { + ac.mu.Unlock() + return + } + + addrs := ac.addrs + backoffFor := ac.dopts.bs.Backoff(ac.backoffIdx) + // This will be the duration that dial gets to finish. + dialDuration := minConnectTimeout + if ac.dopts.minConnectTimeout != nil { + dialDuration = ac.dopts.minConnectTimeout() + } + + if dialDuration < backoffFor { + // Give dial more time as we keep failing to connect. + dialDuration = backoffFor + } + // We can potentially spend all the time trying the first address, and + // if the server accepts the connection and then hangs, the following + // addresses will never be tried. + // + // The spec doesn't mention what should be done for multiple addresses. + // https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md#proposed-backoff-algorithm + connectDeadline := time.Now().Add(dialDuration) + + ac.updateConnectivityState(connectivity.Connecting, nil) + ac.transport = nil + ac.mu.Unlock() + + newTr, addr, reconnect, err := ac.tryAllAddrs(addrs, connectDeadline) + if err != nil { + // After exhausting all addresses, the addrConn enters + // TRANSIENT_FAILURE. + ac.mu.Lock() + if ac.state == connectivity.Shutdown { + ac.mu.Unlock() + return + } + ac.updateConnectivityState(connectivity.TransientFailure, err) + + // Backoff. + b := ac.resetBackoff + ac.mu.Unlock() + + timer := time.NewTimer(backoffFor) + select { + case <-timer.C: + ac.mu.Lock() + ac.backoffIdx++ + ac.mu.Unlock() + case <-b: + timer.Stop() + case <-ac.ctx.Done(): + timer.Stop() + return + } + continue + } + + ac.mu.Lock() + if ac.state == connectivity.Shutdown { + ac.mu.Unlock() + newTr.Close() + return + } + ac.curAddr = addr + ac.transport = newTr + ac.backoffIdx = 0 + + hctx, hcancel := context.WithCancel(ac.ctx) + ac.startHealthCheck(hctx) + ac.mu.Unlock() + + // Block until the created transport is down. And when this happens, + // we restart from the top of the addr list. + <-reconnect.Done() + hcancel() + // restart connecting - the top of the loop will set state to + // CONNECTING. This is against the current connectivity semantics doc, + // however it allows for graceful behavior for RPCs not yet dispatched + // - unfortunate timing would otherwise lead to the RPC failing even + // though the TRANSIENT_FAILURE state (called for by the doc) would be + // instantaneous. + // + // Ideally we should transition to Idle here and block until there is + // RPC activity that leads to the balancer requesting a reconnect of + // the associated SubConn. + } +} + +// tryAllAddrs tries to creates a connection to the addresses, and stop when at the +// first successful one. It returns the transport, the address and a Event in +// the successful case. The Event fires when the returned transport disconnects. +func (ac *addrConn) tryAllAddrs(addrs []resolver.Address, connectDeadline time.Time) (transport.ClientTransport, resolver.Address, *grpcsync.Event, error) { + var firstConnErr error + for _, addr := range addrs { + ac.mu.Lock() + if ac.state == connectivity.Shutdown { + ac.mu.Unlock() + return nil, resolver.Address{}, nil, errConnClosing + } + + ac.cc.mu.RLock() + ac.dopts.copts.KeepaliveParams = ac.cc.mkp + ac.cc.mu.RUnlock() + + copts := ac.dopts.copts + if ac.scopts.CredsBundle != nil { + copts.CredsBundle = ac.scopts.CredsBundle + } + ac.mu.Unlock() + + channelz.Infof(logger, ac.channelzID, "Subchannel picks a new address %q to connect", addr.Addr) + + newTr, reconnect, err := ac.createTransport(addr, copts, connectDeadline) + if err == nil { + return newTr, addr, reconnect, nil + } + if firstConnErr == nil { + firstConnErr = err + } + ac.cc.updateConnectionError(err) + } + + // Couldn't connect to any address. + return nil, resolver.Address{}, nil, firstConnErr +} + +// createTransport creates a connection to addr. It returns the transport and a +// Event in the successful case. The Event fires when the returned transport +// disconnects. +func (ac *addrConn) createTransport(addr resolver.Address, copts transport.ConnectOptions, connectDeadline time.Time) (transport.ClientTransport, *grpcsync.Event, error) { + prefaceReceived := make(chan struct{}) + onCloseCalled := make(chan struct{}) + reconnect := grpcsync.NewEvent() + + // addr.ServerName takes precedent over ClientConn authority, if present. + if addr.ServerName == "" { + addr.ServerName = ac.cc.authority + } + + once := sync.Once{} + onGoAway := func(r transport.GoAwayReason) { + ac.mu.Lock() + ac.adjustParams(r) + once.Do(func() { + if ac.state == connectivity.Ready { + // Prevent this SubConn from being used for new RPCs by setting its + // state to Connecting. + // + // TODO: this should be Idle when grpc-go properly supports it. + ac.updateConnectivityState(connectivity.Connecting, nil) + } + }) + ac.mu.Unlock() + reconnect.Fire() + } + + onClose := func() { + ac.mu.Lock() + once.Do(func() { + if ac.state == connectivity.Ready { + // Prevent this SubConn from being used for new RPCs by setting its + // state to Connecting. + // + // TODO: this should be Idle when grpc-go properly supports it. + ac.updateConnectivityState(connectivity.Connecting, nil) + } + }) + ac.mu.Unlock() + close(onCloseCalled) + reconnect.Fire() + } + + onPrefaceReceipt := func() { + close(prefaceReceived) + } + + connectCtx, cancel := context.WithDeadline(ac.ctx, connectDeadline) + defer cancel() + if channelz.IsOn() { + copts.ChannelzParentID = ac.channelzID + } + + newTr, err := transport.NewClientTransport(connectCtx, ac.cc.ctx, addr, copts, onPrefaceReceipt, onGoAway, onClose) + if err != nil { + // newTr is either nil, or closed. + channelz.Warningf(logger, ac.channelzID, "grpc: addrConn.createTransport failed to connect to %v. Err: %v. Reconnecting...", addr, err) + return nil, nil, err + } + + select { + case <-time.After(time.Until(connectDeadline)): + // We didn't get the preface in time. + newTr.Close() + channelz.Warningf(logger, ac.channelzID, "grpc: addrConn.createTransport failed to connect to %v: didn't receive server preface in time. Reconnecting...", addr) + return nil, nil, errors.New("timed out waiting for server handshake") + case <-prefaceReceived: + // We got the preface - huzzah! things are good. + case <-onCloseCalled: + // The transport has already closed - noop. + return nil, nil, errors.New("connection closed") + // TODO(deklerk) this should bail on ac.ctx.Done(). Add a test and fix. + } + return newTr, reconnect, nil +} + +// startHealthCheck starts the health checking stream (RPC) to watch the health +// stats of this connection if health checking is requested and configured. +// +// LB channel health checking is enabled when all requirements below are met: +// 1. it is not disabled by the user with the WithDisableHealthCheck DialOption +// 2. internal.HealthCheckFunc is set by importing the grpc/health package +// 3. a service config with non-empty healthCheckConfig field is provided +// 4. the load balancer requests it +// +// It sets addrConn to READY if the health checking stream is not started. +// +// Caller must hold ac.mu. +func (ac *addrConn) startHealthCheck(ctx context.Context) { + var healthcheckManagingState bool + defer func() { + if !healthcheckManagingState { + ac.updateConnectivityState(connectivity.Ready, nil) + } + }() + + if ac.cc.dopts.disableHealthCheck { + return + } + healthCheckConfig := ac.cc.healthCheckConfig() + if healthCheckConfig == nil { + return + } + if !ac.scopts.HealthCheckEnabled { + return + } + healthCheckFunc := ac.cc.dopts.healthCheckFunc + if healthCheckFunc == nil { + // The health package is not imported to set health check function. + // + // TODO: add a link to the health check doc in the error message. + channelz.Error(logger, ac.channelzID, "Health check is requested but health check function is not set.") + return + } + + healthcheckManagingState = true + + // Set up the health check helper functions. + currentTr := ac.transport + newStream := func(method string) (interface{}, error) { + ac.mu.Lock() + if ac.transport != currentTr { + ac.mu.Unlock() + return nil, status.Error(codes.Canceled, "the provided transport is no longer valid to use") + } + ac.mu.Unlock() + return newNonRetryClientStream(ctx, &StreamDesc{ServerStreams: true}, method, currentTr, ac) + } + setConnectivityState := func(s connectivity.State, lastErr error) { + ac.mu.Lock() + defer ac.mu.Unlock() + if ac.transport != currentTr { + return + } + ac.updateConnectivityState(s, lastErr) + } + // Start the health checking stream. + go func() { + err := ac.cc.dopts.healthCheckFunc(ctx, newStream, setConnectivityState, healthCheckConfig.ServiceName) + if err != nil { + if status.Code(err) == codes.Unimplemented { + channelz.Error(logger, ac.channelzID, "Subchannel health check is unimplemented at server side, thus health check is disabled") + } else { + channelz.Errorf(logger, ac.channelzID, "HealthCheckFunc exits with unexpected error %v", err) + } + } + }() +} + +func (ac *addrConn) resetConnectBackoff() { + ac.mu.Lock() + close(ac.resetBackoff) + ac.backoffIdx = 0 + ac.resetBackoff = make(chan struct{}) + ac.mu.Unlock() +} + +// getReadyTransport returns the transport if ac's state is READY. +// Otherwise it returns nil, false. +// If ac's state is IDLE, it will trigger ac to connect. +func (ac *addrConn) getReadyTransport() (transport.ClientTransport, bool) { + ac.mu.Lock() + if ac.state == connectivity.Ready && ac.transport != nil { + t := ac.transport + ac.mu.Unlock() + return t, true + } + var idle bool + if ac.state == connectivity.Idle { + idle = true + } + ac.mu.Unlock() + // Trigger idle ac to connect. + if idle { + ac.connect() + } + return nil, false +} + +// tearDown starts to tear down the addrConn. +// TODO(zhaoq): Make this synchronous to avoid unbounded memory consumption in +// some edge cases (e.g., the caller opens and closes many addrConn's in a +// tight loop. +// tearDown doesn't remove ac from ac.cc.conns. +func (ac *addrConn) tearDown(err error) { + ac.mu.Lock() + if ac.state == connectivity.Shutdown { + ac.mu.Unlock() + return + } + curTr := ac.transport + ac.transport = nil + // We have to set the state to Shutdown before anything else to prevent races + // between setting the state and logic that waits on context cancellation / etc. + ac.updateConnectivityState(connectivity.Shutdown, nil) + ac.cancel() + ac.curAddr = resolver.Address{} + if err == errConnDrain && curTr != nil { + // GracefulClose(...) may be executed multiple times when + // i) receiving multiple GoAway frames from the server; or + // ii) there are concurrent name resolver/Balancer triggered + // address removal and GoAway. + // We have to unlock and re-lock here because GracefulClose => Close => onClose, which requires locking ac.mu. + ac.mu.Unlock() + curTr.GracefulClose() + ac.mu.Lock() + } + if channelz.IsOn() { + channelz.AddTraceEvent(logger, ac.channelzID, 0, &channelz.TraceEventDesc{ + Desc: "Subchannel Deleted", + Severity: channelz.CtInfo, + Parent: &channelz.TraceEventDesc{ + Desc: fmt.Sprintf("Subchanel(id:%d) deleted", ac.channelzID), + Severity: channelz.CtInfo, + }, + }) + // TraceEvent needs to be called before RemoveEntry, as TraceEvent may add trace reference to + // the entity being deleted, and thus prevent it from being deleted right away. + channelz.RemoveEntry(ac.channelzID) + } + ac.mu.Unlock() +} + +func (ac *addrConn) getState() connectivity.State { + ac.mu.Lock() + defer ac.mu.Unlock() + return ac.state +} + +func (ac *addrConn) ChannelzMetric() *channelz.ChannelInternalMetric { + ac.mu.Lock() + addr := ac.curAddr.Addr + ac.mu.Unlock() + return &channelz.ChannelInternalMetric{ + State: ac.getState(), + Target: addr, + CallsStarted: atomic.LoadInt64(&ac.czData.callsStarted), + CallsSucceeded: atomic.LoadInt64(&ac.czData.callsSucceeded), + CallsFailed: atomic.LoadInt64(&ac.czData.callsFailed), + LastCallStartedTimestamp: time.Unix(0, atomic.LoadInt64(&ac.czData.lastCallStartedTime)), + } +} + +func (ac *addrConn) incrCallsStarted() { + atomic.AddInt64(&ac.czData.callsStarted, 1) + atomic.StoreInt64(&ac.czData.lastCallStartedTime, time.Now().UnixNano()) +} + +func (ac *addrConn) incrCallsSucceeded() { + atomic.AddInt64(&ac.czData.callsSucceeded, 1) +} + +func (ac *addrConn) incrCallsFailed() { + atomic.AddInt64(&ac.czData.callsFailed, 1) +} + +type retryThrottler struct { + max float64 + thresh float64 + ratio float64 + + mu sync.Mutex + tokens float64 // TODO(dfawley): replace with atomic and remove lock. +} + +// throttle subtracts a retry token from the pool and returns whether a retry +// should be throttled (disallowed) based upon the retry throttling policy in +// the service config. +func (rt *retryThrottler) throttle() bool { + if rt == nil { + return false + } + rt.mu.Lock() + defer rt.mu.Unlock() + rt.tokens-- + if rt.tokens < 0 { + rt.tokens = 0 + } + return rt.tokens <= rt.thresh +} + +func (rt *retryThrottler) successfulRPC() { + if rt == nil { + return + } + rt.mu.Lock() + defer rt.mu.Unlock() + rt.tokens += rt.ratio + if rt.tokens > rt.max { + rt.tokens = rt.max + } +} + +type channelzChannel struct { + cc *ClientConn +} + +func (c *channelzChannel) ChannelzMetric() *channelz.ChannelInternalMetric { + return c.cc.channelzMetric() +} + +// ErrClientConnTimeout indicates that the ClientConn cannot establish the +// underlying connections within the specified timeout. +// +// Deprecated: This error is never returned by grpc and should not be +// referenced by users. +var ErrClientConnTimeout = errors.New("grpc: timed out when dialing") + +func (cc *ClientConn) getResolver(scheme string) resolver.Builder { + for _, rb := range cc.dopts.resolvers { + if scheme == rb.Scheme() { + return rb + } + } + return resolver.Get(scheme) +} + +func (cc *ClientConn) updateConnectionError(err error) { + cc.lceMu.Lock() + cc.lastConnectionError = err + cc.lceMu.Unlock() +} + +func (cc *ClientConn) connectionError() error { + cc.lceMu.Lock() + defer cc.lceMu.Unlock() + return cc.lastConnectionError +} diff --git a/vendor/google.golang.org/grpc/codec.go b/vendor/google.golang.org/grpc/codec.go new file mode 100644 index 000000000..129776547 --- /dev/null +++ b/vendor/google.golang.org/grpc/codec.go @@ -0,0 +1,50 @@ +/* + * + * Copyright 2014 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpc + +import ( + "google.golang.org/grpc/encoding" + _ "google.golang.org/grpc/encoding/proto" // to register the Codec for "proto" +) + +// baseCodec contains the functionality of both Codec and encoding.Codec, but +// omits the name/string, which vary between the two and are not needed for +// anything besides the registry in the encoding package. +type baseCodec interface { + Marshal(v interface{}) ([]byte, error) + Unmarshal(data []byte, v interface{}) error +} + +var _ baseCodec = Codec(nil) +var _ baseCodec = encoding.Codec(nil) + +// Codec defines the interface gRPC uses to encode and decode messages. +// Note that implementations of this interface must be thread safe; +// a Codec's methods can be called from concurrent goroutines. +// +// Deprecated: use encoding.Codec instead. +type Codec interface { + // Marshal returns the wire format of v. + Marshal(v interface{}) ([]byte, error) + // Unmarshal parses the wire format into v. + Unmarshal(data []byte, v interface{}) error + // String returns the name of the Codec implementation. This is unused by + // gRPC. + String() string +} diff --git a/vendor/google.golang.org/grpc/codegen.sh b/vendor/google.golang.org/grpc/codegen.sh new file mode 100644 index 000000000..4cdc6ba7c --- /dev/null +++ b/vendor/google.golang.org/grpc/codegen.sh @@ -0,0 +1,17 @@ +#!/usr/bin/env bash + +# This script serves as an example to demonstrate how to generate the gRPC-Go +# interface and the related messages from .proto file. +# +# It assumes the installation of i) Google proto buffer compiler at +# https://github.com/google/protobuf (after v2.6.1) and ii) the Go codegen +# plugin at https://github.com/golang/protobuf (after 2015-02-20). If you have +# not, please install them first. +# +# We recommend running this script at $GOPATH/src. +# +# If this is not what you need, feel free to make your own scripts. Again, this +# script is for demonstration purpose. +# +proto=$1 +protoc --go_out=plugins=grpc:. $proto diff --git a/vendor/google.golang.org/grpc/codes/codes.go b/vendor/google.golang.org/grpc/codes/codes.go index 02738839d..11b106182 100644 --- a/vendor/google.golang.org/grpc/codes/codes.go +++ b/vendor/google.golang.org/grpc/codes/codes.go @@ -33,6 +33,9 @@ const ( OK Code = 0 // Canceled indicates the operation was canceled (typically by the caller). + // + // The gRPC framework will generate this error code when cancellation + // is requested. Canceled Code = 1 // Unknown error. An example of where this error may be returned is @@ -40,12 +43,17 @@ const ( // an error-space that is not known in this address space. Also // errors raised by APIs that do not return enough error information // may be converted to this error. + // + // The gRPC framework will generate this error code in the above two + // mentioned cases. Unknown Code = 2 // InvalidArgument indicates client specified an invalid argument. // Note that this differs from FailedPrecondition. It indicates arguments // that are problematic regardless of the state of the system // (e.g., a malformed file name). + // + // This error code will not be generated by the gRPC framework. InvalidArgument Code = 3 // DeadlineExceeded means operation expired before completion. @@ -53,14 +61,21 @@ const ( // returned even if the operation has completed successfully. For // example, a successful response from a server could have been delayed // long enough for the deadline to expire. + // + // The gRPC framework will generate this error code when the deadline is + // exceeded. DeadlineExceeded Code = 4 // NotFound means some requested entity (e.g., file or directory) was // not found. + // + // This error code will not be generated by the gRPC framework. NotFound Code = 5 // AlreadyExists means an attempt to create an entity failed because one // already exists. + // + // This error code will not be generated by the gRPC framework. AlreadyExists Code = 6 // PermissionDenied indicates the caller does not have permission to @@ -69,10 +84,17 @@ const ( // instead for those errors). It must not be // used if the caller cannot be identified (use Unauthenticated // instead for those errors). + // + // This error code will not be generated by the gRPC core framework, + // but expect authentication middleware to use it. PermissionDenied Code = 7 // ResourceExhausted indicates some resource has been exhausted, perhaps // a per-user quota, or perhaps the entire file system is out of space. + // + // This error code will be generated by the gRPC framework in + // out-of-memory and server overload situations, or when a message is + // larger than the configured maximum size. ResourceExhausted Code = 8 // FailedPrecondition indicates operation was rejected because the @@ -94,6 +116,8 @@ const ( // REST Get/Update/Delete on a resource and the resource on the // server does not match the condition. E.g., conflicting // read-modify-write on the same resource. + // + // This error code will not be generated by the gRPC framework. FailedPrecondition Code = 9 // Aborted indicates the operation was aborted, typically due to a @@ -102,6 +126,8 @@ const ( // // See litmus test above for deciding between FailedPrecondition, // Aborted, and Unavailable. + // + // This error code will not be generated by the gRPC framework. Aborted Code = 10 // OutOfRange means operation was attempted past the valid range. @@ -119,15 +145,26 @@ const ( // error) when it applies so that callers who are iterating through // a space can easily look for an OutOfRange error to detect when // they are done. + // + // This error code will not be generated by the gRPC framework. OutOfRange Code = 11 // Unimplemented indicates operation is not implemented or not // supported/enabled in this service. + // + // This error code will be generated by the gRPC framework. Most + // commonly, you will see this error code when a method implementation + // is missing on the server. It can also be generated for unknown + // compression algorithms or a disagreement as to whether an RPC should + // be streaming. Unimplemented Code = 12 // Internal errors. Means some invariants expected by underlying // system has been broken. If you see one of these errors, // something is very broken. + // + // This error code will be generated by the gRPC framework in several + // internal error conditions. Internal Code = 13 // Unavailable indicates the service is currently unavailable. @@ -137,13 +174,22 @@ const ( // // See litmus test above for deciding between FailedPrecondition, // Aborted, and Unavailable. + // + // This error code will be generated by the gRPC framework during + // abrupt shutdown of a server process or network connection. Unavailable Code = 14 // DataLoss indicates unrecoverable data loss or corruption. + // + // This error code will not be generated by the gRPC framework. DataLoss Code = 15 // Unauthenticated indicates the request does not have valid // authentication credentials for the operation. + // + // The gRPC framework will generate this error code when the + // authentication metadata is invalid or a Credentials callback fails, + // but also expect authentication middleware to generate it. Unauthenticated Code = 16 _maxCode = 17 diff --git a/vendor/google.golang.org/grpc/connectivity/connectivity.go b/vendor/google.golang.org/grpc/connectivity/connectivity.go new file mode 100644 index 000000000..010156261 --- /dev/null +++ b/vendor/google.golang.org/grpc/connectivity/connectivity.go @@ -0,0 +1,63 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package connectivity defines connectivity semantics. +// For details, see https://github.com/grpc/grpc/blob/master/doc/connectivity-semantics-and-api.md. +// All APIs in this package are experimental. +package connectivity + +import ( + "google.golang.org/grpc/grpclog" +) + +var logger = grpclog.Component("core") + +// State indicates the state of connectivity. +// It can be the state of a ClientConn or SubConn. +type State int + +func (s State) String() string { + switch s { + case Idle: + return "IDLE" + case Connecting: + return "CONNECTING" + case Ready: + return "READY" + case TransientFailure: + return "TRANSIENT_FAILURE" + case Shutdown: + return "SHUTDOWN" + default: + logger.Errorf("unknown connectivity state: %d", s) + return "Invalid-State" + } +} + +const ( + // Idle indicates the ClientConn is idle. + Idle State = iota + // Connecting indicates the ClientConn is connecting. + Connecting + // Ready indicates the ClientConn is ready for work. + Ready + // TransientFailure indicates the ClientConn has seen a failure but expects to recover. + TransientFailure + // Shutdown indicates the ClientConn has started shutting down. + Shutdown +) diff --git a/vendor/google.golang.org/grpc/credentials/credentials.go b/vendor/google.golang.org/grpc/credentials/credentials.go new file mode 100644 index 000000000..02766443a --- /dev/null +++ b/vendor/google.golang.org/grpc/credentials/credentials.go @@ -0,0 +1,289 @@ +/* + * + * Copyright 2014 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package credentials implements various credentials supported by gRPC library, +// which encapsulate all the state needed by a client to authenticate with a +// server and make various assertions, e.g., about the client's identity, role, +// or whether it is authorized to make a particular call. +package credentials // import "google.golang.org/grpc/credentials" + +import ( + "context" + "errors" + "fmt" + "net" + + "github.com/golang/protobuf/proto" + "google.golang.org/grpc/attributes" + "google.golang.org/grpc/internal" +) + +// PerRPCCredentials defines the common interface for the credentials which need to +// attach security information to every RPC (e.g., oauth2). +type PerRPCCredentials interface { + // GetRequestMetadata gets the current request metadata, refreshing + // tokens if required. This should be called by the transport layer on + // each request, and the data should be populated in headers or other + // context. If a status code is returned, it will be used as the status + // for the RPC. uri is the URI of the entry point for the request. + // When supported by the underlying implementation, ctx can be used for + // timeout and cancellation. Additionally, RequestInfo data will be + // available via ctx to this call. + // TODO(zhaoq): Define the set of the qualified keys instead of leaving + // it as an arbitrary string. + GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error) + // RequireTransportSecurity indicates whether the credentials requires + // transport security. + RequireTransportSecurity() bool +} + +// SecurityLevel defines the protection level on an established connection. +// +// This API is experimental. +type SecurityLevel int + +const ( + // Invalid indicates an invalid security level. + // The zero SecurityLevel value is invalid for backward compatibility. + Invalid SecurityLevel = iota + // NoSecurity indicates a connection is insecure. + NoSecurity + // IntegrityOnly indicates a connection only provides integrity protection. + IntegrityOnly + // PrivacyAndIntegrity indicates a connection provides both privacy and integrity protection. + PrivacyAndIntegrity +) + +// String returns SecurityLevel in a string format. +func (s SecurityLevel) String() string { + switch s { + case NoSecurity: + return "NoSecurity" + case IntegrityOnly: + return "IntegrityOnly" + case PrivacyAndIntegrity: + return "PrivacyAndIntegrity" + } + return fmt.Sprintf("invalid SecurityLevel: %v", int(s)) +} + +// CommonAuthInfo contains authenticated information common to AuthInfo implementations. +// It should be embedded in a struct implementing AuthInfo to provide additional information +// about the credentials. +// +// This API is experimental. +type CommonAuthInfo struct { + SecurityLevel SecurityLevel +} + +// GetCommonAuthInfo returns the pointer to CommonAuthInfo struct. +func (c *CommonAuthInfo) GetCommonAuthInfo() *CommonAuthInfo { + return c +} + +// ProtocolInfo provides information regarding the gRPC wire protocol version, +// security protocol, security protocol version in use, server name, etc. +type ProtocolInfo struct { + // ProtocolVersion is the gRPC wire protocol version. + ProtocolVersion string + // SecurityProtocol is the security protocol in use. + SecurityProtocol string + // SecurityVersion is the security protocol version. It is a static version string from the + // credentials, not a value that reflects per-connection protocol negotiation. To retrieve + // details about the credentials used for a connection, use the Peer's AuthInfo field instead. + // + // Deprecated: please use Peer.AuthInfo. + SecurityVersion string + // ServerName is the user-configured server name. + ServerName string +} + +// AuthInfo defines the common interface for the auth information the users are interested in. +// A struct that implements AuthInfo should embed CommonAuthInfo by including additional +// information about the credentials in it. +type AuthInfo interface { + AuthType() string +} + +// ErrConnDispatched indicates that rawConn has been dispatched out of gRPC +// and the caller should not close rawConn. +var ErrConnDispatched = errors.New("credentials: rawConn is dispatched out of gRPC") + +// TransportCredentials defines the common interface for all the live gRPC wire +// protocols and supported transport security protocols (e.g., TLS, SSL). +type TransportCredentials interface { + // ClientHandshake does the authentication handshake specified by the + // corresponding authentication protocol on rawConn for clients. It returns + // the authenticated connection and the corresponding auth information + // about the connection. The auth information should embed CommonAuthInfo + // to return additional information about the credentials. Implementations + // must use the provided context to implement timely cancellation. gRPC + // will try to reconnect if the error returned is a temporary error + // (io.EOF, context.DeadlineExceeded or err.Temporary() == true). If the + // returned error is a wrapper error, implementations should make sure that + // the error implements Temporary() to have the correct retry behaviors. + // Additionally, ClientHandshakeInfo data will be available via the context + // passed to this call. + // + // If the returned net.Conn is closed, it MUST close the net.Conn provided. + ClientHandshake(context.Context, string, net.Conn) (net.Conn, AuthInfo, error) + // ServerHandshake does the authentication handshake for servers. It returns + // the authenticated connection and the corresponding auth information about + // the connection. The auth information should embed CommonAuthInfo to return additional information + // about the credentials. + // + // If the returned net.Conn is closed, it MUST close the net.Conn provided. + ServerHandshake(net.Conn) (net.Conn, AuthInfo, error) + // Info provides the ProtocolInfo of this TransportCredentials. + Info() ProtocolInfo + // Clone makes a copy of this TransportCredentials. + Clone() TransportCredentials + // OverrideServerName overrides the server name used to verify the hostname on the returned certificates from the server. + // gRPC internals also use it to override the virtual hosting name if it is set. + // It must be called before dialing. Currently, this is only used by grpclb. + OverrideServerName(string) error +} + +// Bundle is a combination of TransportCredentials and PerRPCCredentials. +// +// It also contains a mode switching method, so it can be used as a combination +// of different credential policies. +// +// Bundle cannot be used together with individual TransportCredentials. +// PerRPCCredentials from Bundle will be appended to other PerRPCCredentials. +// +// This API is experimental. +type Bundle interface { + TransportCredentials() TransportCredentials + PerRPCCredentials() PerRPCCredentials + // NewWithMode should make a copy of Bundle, and switch mode. Modifying the + // existing Bundle may cause races. + // + // NewWithMode returns nil if the requested mode is not supported. + NewWithMode(mode string) (Bundle, error) +} + +// RequestInfo contains request data attached to the context passed to GetRequestMetadata calls. +// +// This API is experimental. +type RequestInfo struct { + // The method passed to Invoke or NewStream for this RPC. (For proto methods, this has the format "/some.Service/Method") + Method string + // AuthInfo contains the information from a security handshake (TransportCredentials.ClientHandshake, TransportCredentials.ServerHandshake) + AuthInfo AuthInfo +} + +// requestInfoKey is a struct to be used as the key when attaching a RequestInfo to a context object. +type requestInfoKey struct{} + +// RequestInfoFromContext extracts the RequestInfo from the context if it exists. +// +// This API is experimental. +func RequestInfoFromContext(ctx context.Context) (ri RequestInfo, ok bool) { + ri, ok = ctx.Value(requestInfoKey{}).(RequestInfo) + return +} + +// ClientHandshakeInfo holds data to be passed to ClientHandshake. This makes +// it possible to pass arbitrary data to the handshaker from gRPC, resolver, +// balancer etc. Individual credential implementations control the actual +// format of the data that they are willing to receive. +// +// This API is experimental. +type ClientHandshakeInfo struct { + // Attributes contains the attributes for the address. It could be provided + // by the gRPC, resolver, balancer etc. + Attributes *attributes.Attributes +} + +// clientHandshakeInfoKey is a struct used as the key to store +// ClientHandshakeInfo in a context. +type clientHandshakeInfoKey struct{} + +// ClientHandshakeInfoFromContext returns the ClientHandshakeInfo struct stored +// in ctx. +// +// This API is experimental. +func ClientHandshakeInfoFromContext(ctx context.Context) ClientHandshakeInfo { + chi, _ := ctx.Value(clientHandshakeInfoKey{}).(ClientHandshakeInfo) + return chi +} + +// CheckSecurityLevel checks if a connection's security level is greater than or equal to the specified one. +// It returns success if 1) the condition is satisified or 2) AuthInfo struct does not implement GetCommonAuthInfo() method +// or 3) CommonAuthInfo.SecurityLevel has an invalid zero value. For 2) and 3), it is for the purpose of backward-compatibility. +// +// This API is experimental. +func CheckSecurityLevel(ctx context.Context, level SecurityLevel) error { + type internalInfo interface { + GetCommonAuthInfo() *CommonAuthInfo + } + ri, _ := RequestInfoFromContext(ctx) + if ri.AuthInfo == nil { + return errors.New("unable to obtain SecurityLevel from context") + } + if ci, ok := ri.AuthInfo.(internalInfo); ok { + // CommonAuthInfo.SecurityLevel has an invalid value. + if ci.GetCommonAuthInfo().SecurityLevel == Invalid { + return nil + } + if ci.GetCommonAuthInfo().SecurityLevel < level { + return fmt.Errorf("requires SecurityLevel %v; connection has %v", level, ci.GetCommonAuthInfo().SecurityLevel) + } + } + // The condition is satisfied or AuthInfo struct does not implement GetCommonAuthInfo() method. + return nil +} + +func init() { + internal.NewRequestInfoContext = func(ctx context.Context, ri RequestInfo) context.Context { + return context.WithValue(ctx, requestInfoKey{}, ri) + } + internal.NewClientHandshakeInfoContext = func(ctx context.Context, chi ClientHandshakeInfo) context.Context { + return context.WithValue(ctx, clientHandshakeInfoKey{}, chi) + } +} + +// ChannelzSecurityInfo defines the interface that security protocols should implement +// in order to provide security info to channelz. +// +// This API is experimental. +type ChannelzSecurityInfo interface { + GetSecurityValue() ChannelzSecurityValue +} + +// ChannelzSecurityValue defines the interface that GetSecurityValue() return value +// should satisfy. This interface should only be satisfied by *TLSChannelzSecurityValue +// and *OtherChannelzSecurityValue. +// +// This API is experimental. +type ChannelzSecurityValue interface { + isChannelzSecurityValue() +} + +// OtherChannelzSecurityValue defines the struct that non-TLS protocol should return +// from GetSecurityValue(), which contains protocol specific security info. Note +// the Value field will be sent to users of channelz requesting channel info, and +// thus sensitive info should better be avoided. +// +// This API is experimental. +type OtherChannelzSecurityValue struct { + ChannelzSecurityValue + Name string + Value proto.Message +} diff --git a/vendor/google.golang.org/grpc/credentials/go12.go b/vendor/google.golang.org/grpc/credentials/go12.go new file mode 100644 index 000000000..ccbf35b33 --- /dev/null +++ b/vendor/google.golang.org/grpc/credentials/go12.go @@ -0,0 +1,30 @@ +// +build go1.12 + +/* + * + * Copyright 2019 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package credentials + +import "crypto/tls" + +// This init function adds cipher suite constants only defined in Go 1.12. +func init() { + cipherSuiteLookup[tls.TLS_AES_128_GCM_SHA256] = "TLS_AES_128_GCM_SHA256" + cipherSuiteLookup[tls.TLS_AES_256_GCM_SHA384] = "TLS_AES_256_GCM_SHA384" + cipherSuiteLookup[tls.TLS_CHACHA20_POLY1305_SHA256] = "TLS_CHACHA20_POLY1305_SHA256" +} diff --git a/vendor/google.golang.org/grpc/credentials/tls.go b/vendor/google.golang.org/grpc/credentials/tls.go new file mode 100644 index 000000000..8ee7124f2 --- /dev/null +++ b/vendor/google.golang.org/grpc/credentials/tls.go @@ -0,0 +1,233 @@ +/* + * + * Copyright 2014 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package credentials + +import ( + "context" + "crypto/tls" + "crypto/x509" + "fmt" + "io/ioutil" + "net" + "net/url" + + credinternal "google.golang.org/grpc/internal/credentials" +) + +// TLSInfo contains the auth information for a TLS authenticated connection. +// It implements the AuthInfo interface. +type TLSInfo struct { + State tls.ConnectionState + CommonAuthInfo + // This API is experimental. + SPIFFEID *url.URL +} + +// AuthType returns the type of TLSInfo as a string. +func (t TLSInfo) AuthType() string { + return "tls" +} + +// GetSecurityValue returns security info requested by channelz. +func (t TLSInfo) GetSecurityValue() ChannelzSecurityValue { + v := &TLSChannelzSecurityValue{ + StandardName: cipherSuiteLookup[t.State.CipherSuite], + } + // Currently there's no way to get LocalCertificate info from tls package. + if len(t.State.PeerCertificates) > 0 { + v.RemoteCertificate = t.State.PeerCertificates[0].Raw + } + return v +} + +// tlsCreds is the credentials required for authenticating a connection using TLS. +type tlsCreds struct { + // TLS configuration + config *tls.Config +} + +func (c tlsCreds) Info() ProtocolInfo { + return ProtocolInfo{ + SecurityProtocol: "tls", + SecurityVersion: "1.2", + ServerName: c.config.ServerName, + } +} + +func (c *tlsCreds) ClientHandshake(ctx context.Context, authority string, rawConn net.Conn) (_ net.Conn, _ AuthInfo, err error) { + // use local cfg to avoid clobbering ServerName if using multiple endpoints + cfg := credinternal.CloneTLSConfig(c.config) + if cfg.ServerName == "" { + serverName, _, err := net.SplitHostPort(authority) + if err != nil { + // If the authority had no host port or if the authority cannot be parsed, use it as-is. + serverName = authority + } + cfg.ServerName = serverName + } + conn := tls.Client(rawConn, cfg) + errChannel := make(chan error, 1) + go func() { + errChannel <- conn.Handshake() + close(errChannel) + }() + select { + case err := <-errChannel: + if err != nil { + conn.Close() + return nil, nil, err + } + case <-ctx.Done(): + conn.Close() + return nil, nil, ctx.Err() + } + tlsInfo := TLSInfo{ + State: conn.ConnectionState(), + CommonAuthInfo: CommonAuthInfo{ + SecurityLevel: PrivacyAndIntegrity, + }, + } + id := credinternal.SPIFFEIDFromState(conn.ConnectionState()) + if id != nil { + tlsInfo.SPIFFEID = id + } + return credinternal.WrapSyscallConn(rawConn, conn), tlsInfo, nil +} + +func (c *tlsCreds) ServerHandshake(rawConn net.Conn) (net.Conn, AuthInfo, error) { + conn := tls.Server(rawConn, c.config) + if err := conn.Handshake(); err != nil { + conn.Close() + return nil, nil, err + } + tlsInfo := TLSInfo{ + State: conn.ConnectionState(), + CommonAuthInfo: CommonAuthInfo{ + SecurityLevel: PrivacyAndIntegrity, + }, + } + id := credinternal.SPIFFEIDFromState(conn.ConnectionState()) + if id != nil { + tlsInfo.SPIFFEID = id + } + return credinternal.WrapSyscallConn(rawConn, conn), tlsInfo, nil +} + +func (c *tlsCreds) Clone() TransportCredentials { + return NewTLS(c.config) +} + +func (c *tlsCreds) OverrideServerName(serverNameOverride string) error { + c.config.ServerName = serverNameOverride + return nil +} + +// NewTLS uses c to construct a TransportCredentials based on TLS. +func NewTLS(c *tls.Config) TransportCredentials { + tc := &tlsCreds{credinternal.CloneTLSConfig(c)} + tc.config.NextProtos = credinternal.AppendH2ToNextProtos(tc.config.NextProtos) + return tc +} + +// NewClientTLSFromCert constructs TLS credentials from the provided root +// certificate authority certificate(s) to validate server connections. If +// certificates to establish the identity of the client need to be included in +// the credentials (eg: for mTLS), use NewTLS instead, where a complete +// tls.Config can be specified. +// serverNameOverride is for testing only. If set to a non empty string, +// it will override the virtual host name of authority (e.g. :authority header +// field) in requests. +func NewClientTLSFromCert(cp *x509.CertPool, serverNameOverride string) TransportCredentials { + return NewTLS(&tls.Config{ServerName: serverNameOverride, RootCAs: cp}) +} + +// NewClientTLSFromFile constructs TLS credentials from the provided root +// certificate authority certificate file(s) to validate server connections. If +// certificates to establish the identity of the client need to be included in +// the credentials (eg: for mTLS), use NewTLS instead, where a complete +// tls.Config can be specified. +// serverNameOverride is for testing only. If set to a non empty string, +// it will override the virtual host name of authority (e.g. :authority header +// field) in requests. +func NewClientTLSFromFile(certFile, serverNameOverride string) (TransportCredentials, error) { + b, err := ioutil.ReadFile(certFile) + if err != nil { + return nil, err + } + cp := x509.NewCertPool() + if !cp.AppendCertsFromPEM(b) { + return nil, fmt.Errorf("credentials: failed to append certificates") + } + return NewTLS(&tls.Config{ServerName: serverNameOverride, RootCAs: cp}), nil +} + +// NewServerTLSFromCert constructs TLS credentials from the input certificate for server. +func NewServerTLSFromCert(cert *tls.Certificate) TransportCredentials { + return NewTLS(&tls.Config{Certificates: []tls.Certificate{*cert}}) +} + +// NewServerTLSFromFile constructs TLS credentials from the input certificate file and key +// file for server. +func NewServerTLSFromFile(certFile, keyFile string) (TransportCredentials, error) { + cert, err := tls.LoadX509KeyPair(certFile, keyFile) + if err != nil { + return nil, err + } + return NewTLS(&tls.Config{Certificates: []tls.Certificate{cert}}), nil +} + +// TLSChannelzSecurityValue defines the struct that TLS protocol should return +// from GetSecurityValue(), containing security info like cipher and certificate used. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type TLSChannelzSecurityValue struct { + ChannelzSecurityValue + StandardName string + LocalCertificate []byte + RemoteCertificate []byte +} + +var cipherSuiteLookup = map[uint16]string{ + tls.TLS_RSA_WITH_RC4_128_SHA: "TLS_RSA_WITH_RC4_128_SHA", + tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA: "TLS_RSA_WITH_3DES_EDE_CBC_SHA", + tls.TLS_RSA_WITH_AES_128_CBC_SHA: "TLS_RSA_WITH_AES_128_CBC_SHA", + tls.TLS_RSA_WITH_AES_256_CBC_SHA: "TLS_RSA_WITH_AES_256_CBC_SHA", + tls.TLS_RSA_WITH_AES_128_GCM_SHA256: "TLS_RSA_WITH_AES_128_GCM_SHA256", + tls.TLS_RSA_WITH_AES_256_GCM_SHA384: "TLS_RSA_WITH_AES_256_GCM_SHA384", + tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA: "TLS_ECDHE_ECDSA_WITH_RC4_128_SHA", + tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA: "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA", + tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA: "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA", + tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA: "TLS_ECDHE_RSA_WITH_RC4_128_SHA", + tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA: "TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA", + tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA: "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA", + tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA: "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA", + tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256: "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256", + tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256: "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256", + tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384: "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384", + tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384: "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384", + tls.TLS_FALLBACK_SCSV: "TLS_FALLBACK_SCSV", + tls.TLS_RSA_WITH_AES_128_CBC_SHA256: "TLS_RSA_WITH_AES_128_CBC_SHA256", + tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256: "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256", + tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256: "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256", + tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305: "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305", + tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305: "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305", +} diff --git a/vendor/google.golang.org/grpc/dialoptions.go b/vendor/google.golang.org/grpc/dialoptions.go new file mode 100644 index 000000000..a93fcab8f --- /dev/null +++ b/vendor/google.golang.org/grpc/dialoptions.go @@ -0,0 +1,638 @@ +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpc + +import ( + "context" + "fmt" + "net" + "time" + + "google.golang.org/grpc/backoff" + "google.golang.org/grpc/balancer" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/internal" + internalbackoff "google.golang.org/grpc/internal/backoff" + "google.golang.org/grpc/internal/envconfig" + "google.golang.org/grpc/internal/transport" + "google.golang.org/grpc/keepalive" + "google.golang.org/grpc/resolver" + "google.golang.org/grpc/stats" +) + +// dialOptions configure a Dial call. dialOptions are set by the DialOption +// values passed to Dial. +type dialOptions struct { + unaryInt UnaryClientInterceptor + streamInt StreamClientInterceptor + + chainUnaryInts []UnaryClientInterceptor + chainStreamInts []StreamClientInterceptor + + cp Compressor + dc Decompressor + bs internalbackoff.Strategy + block bool + returnLastError bool + insecure bool + timeout time.Duration + scChan <-chan ServiceConfig + authority string + copts transport.ConnectOptions + callOptions []CallOption + // This is used by WithBalancerName dial option. + balancerBuilder balancer.Builder + channelzParentID int64 + disableServiceConfig bool + disableRetry bool + disableHealthCheck bool + healthCheckFunc internal.HealthChecker + minConnectTimeout func() time.Duration + defaultServiceConfig *ServiceConfig // defaultServiceConfig is parsed from defaultServiceConfigRawJSON. + defaultServiceConfigRawJSON *string + // This is used by ccResolverWrapper to backoff between successive calls to + // resolver.ResolveNow(). The user will have no need to configure this, but + // we need to be able to configure this in tests. + resolveNowBackoff func(int) time.Duration + resolvers []resolver.Builder + withProxy bool +} + +// DialOption configures how we set up the connection. +type DialOption interface { + apply(*dialOptions) +} + +// EmptyDialOption does not alter the dial configuration. It can be embedded in +// another structure to build custom dial options. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type EmptyDialOption struct{} + +func (EmptyDialOption) apply(*dialOptions) {} + +// funcDialOption wraps a function that modifies dialOptions into an +// implementation of the DialOption interface. +type funcDialOption struct { + f func(*dialOptions) +} + +func (fdo *funcDialOption) apply(do *dialOptions) { + fdo.f(do) +} + +func newFuncDialOption(f func(*dialOptions)) *funcDialOption { + return &funcDialOption{ + f: f, + } +} + +// WithWriteBufferSize determines how much data can be batched before doing a +// write on the wire. The corresponding memory allocation for this buffer will +// be twice the size to keep syscalls low. The default value for this buffer is +// 32KB. +// +// Zero will disable the write buffer such that each write will be on underlying +// connection. Note: A Send call may not directly translate to a write. +func WithWriteBufferSize(s int) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.copts.WriteBufferSize = s + }) +} + +// WithReadBufferSize lets you set the size of read buffer, this determines how +// much data can be read at most for each read syscall. +// +// The default value for this buffer is 32KB. Zero will disable read buffer for +// a connection so data framer can access the underlying conn directly. +func WithReadBufferSize(s int) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.copts.ReadBufferSize = s + }) +} + +// WithInitialWindowSize returns a DialOption which sets the value for initial +// window size on a stream. The lower bound for window size is 64K and any value +// smaller than that will be ignored. +func WithInitialWindowSize(s int32) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.copts.InitialWindowSize = s + }) +} + +// WithInitialConnWindowSize returns a DialOption which sets the value for +// initial window size on a connection. The lower bound for window size is 64K +// and any value smaller than that will be ignored. +func WithInitialConnWindowSize(s int32) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.copts.InitialConnWindowSize = s + }) +} + +// WithMaxMsgSize returns a DialOption which sets the maximum message size the +// client can receive. +// +// Deprecated: use WithDefaultCallOptions(MaxCallRecvMsgSize(s)) instead. Will +// be supported throughout 1.x. +func WithMaxMsgSize(s int) DialOption { + return WithDefaultCallOptions(MaxCallRecvMsgSize(s)) +} + +// WithDefaultCallOptions returns a DialOption which sets the default +// CallOptions for calls over the connection. +func WithDefaultCallOptions(cos ...CallOption) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.callOptions = append(o.callOptions, cos...) + }) +} + +// WithCodec returns a DialOption which sets a codec for message marshaling and +// unmarshaling. +// +// Deprecated: use WithDefaultCallOptions(ForceCodec(_)) instead. Will be +// supported throughout 1.x. +func WithCodec(c Codec) DialOption { + return WithDefaultCallOptions(CallCustomCodec(c)) +} + +// WithCompressor returns a DialOption which sets a Compressor to use for +// message compression. It has lower priority than the compressor set by the +// UseCompressor CallOption. +// +// Deprecated: use UseCompressor instead. Will be supported throughout 1.x. +func WithCompressor(cp Compressor) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.cp = cp + }) +} + +// WithDecompressor returns a DialOption which sets a Decompressor to use for +// incoming message decompression. If incoming response messages are encoded +// using the decompressor's Type(), it will be used. Otherwise, the message +// encoding will be used to look up the compressor registered via +// encoding.RegisterCompressor, which will then be used to decompress the +// message. If no compressor is registered for the encoding, an Unimplemented +// status error will be returned. +// +// Deprecated: use encoding.RegisterCompressor instead. Will be supported +// throughout 1.x. +func WithDecompressor(dc Decompressor) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.dc = dc + }) +} + +// WithBalancerName sets the balancer that the ClientConn will be initialized +// with. Balancer registered with balancerName will be used. This function +// panics if no balancer was registered by balancerName. +// +// The balancer cannot be overridden by balancer option specified by service +// config. +// +// Deprecated: use WithDefaultServiceConfig and WithDisableServiceConfig +// instead. Will be removed in a future 1.x release. +func WithBalancerName(balancerName string) DialOption { + builder := balancer.Get(balancerName) + if builder == nil { + panic(fmt.Sprintf("grpc.WithBalancerName: no balancer is registered for name %v", balancerName)) + } + return newFuncDialOption(func(o *dialOptions) { + o.balancerBuilder = builder + }) +} + +// WithServiceConfig returns a DialOption which has a channel to read the +// service configuration. +// +// Deprecated: service config should be received through name resolver or via +// WithDefaultServiceConfig, as specified at +// https://github.com/grpc/grpc/blob/master/doc/service_config.md. Will be +// removed in a future 1.x release. +func WithServiceConfig(c <-chan ServiceConfig) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.scChan = c + }) +} + +// WithConnectParams configures the dialer to use the provided ConnectParams. +// +// The backoff configuration specified as part of the ConnectParams overrides +// all defaults specified in +// https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md. Consider +// using the backoff.DefaultConfig as a base, in cases where you want to +// override only a subset of the backoff configuration. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func WithConnectParams(p ConnectParams) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.bs = internalbackoff.Exponential{Config: p.Backoff} + o.minConnectTimeout = func() time.Duration { + return p.MinConnectTimeout + } + }) +} + +// WithBackoffMaxDelay configures the dialer to use the provided maximum delay +// when backing off after failed connection attempts. +// +// Deprecated: use WithConnectParams instead. Will be supported throughout 1.x. +func WithBackoffMaxDelay(md time.Duration) DialOption { + return WithBackoffConfig(BackoffConfig{MaxDelay: md}) +} + +// WithBackoffConfig configures the dialer to use the provided backoff +// parameters after connection failures. +// +// Deprecated: use WithConnectParams instead. Will be supported throughout 1.x. +func WithBackoffConfig(b BackoffConfig) DialOption { + bc := backoff.DefaultConfig + bc.MaxDelay = b.MaxDelay + return withBackoff(internalbackoff.Exponential{Config: bc}) +} + +// withBackoff sets the backoff strategy used for connectRetryNum after a failed +// connection attempt. +// +// This can be exported if arbitrary backoff strategies are allowed by gRPC. +func withBackoff(bs internalbackoff.Strategy) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.bs = bs + }) +} + +// WithBlock returns a DialOption which makes caller of Dial blocks until the +// underlying connection is up. Without this, Dial returns immediately and +// connecting the server happens in background. +func WithBlock() DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.block = true + }) +} + +// WithReturnConnectionError returns a DialOption which makes the client connection +// return a string containing both the last connection error that occurred and +// the context.DeadlineExceeded error. +// Implies WithBlock() +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func WithReturnConnectionError() DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.block = true + o.returnLastError = true + }) +} + +// WithInsecure returns a DialOption which disables transport security for this +// ClientConn. Note that transport security is required unless WithInsecure is +// set. +func WithInsecure() DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.insecure = true + }) +} + +// WithNoProxy returns a DialOption which disables the use of proxies for this +// ClientConn. This is ignored if WithDialer or WithContextDialer are used. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func WithNoProxy() DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.withProxy = false + }) +} + +// WithTransportCredentials returns a DialOption which configures a connection +// level security credentials (e.g., TLS/SSL). This should not be used together +// with WithCredentialsBundle. +func WithTransportCredentials(creds credentials.TransportCredentials) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.copts.TransportCredentials = creds + }) +} + +// WithPerRPCCredentials returns a DialOption which sets credentials and places +// auth state on each outbound RPC. +func WithPerRPCCredentials(creds credentials.PerRPCCredentials) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.copts.PerRPCCredentials = append(o.copts.PerRPCCredentials, creds) + }) +} + +// WithCredentialsBundle returns a DialOption to set a credentials bundle for +// the ClientConn.WithCreds. This should not be used together with +// WithTransportCredentials. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func WithCredentialsBundle(b credentials.Bundle) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.copts.CredsBundle = b + }) +} + +// WithTimeout returns a DialOption that configures a timeout for dialing a +// ClientConn initially. This is valid if and only if WithBlock() is present. +// +// Deprecated: use DialContext instead of Dial and context.WithTimeout +// instead. Will be supported throughout 1.x. +func WithTimeout(d time.Duration) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.timeout = d + }) +} + +// WithContextDialer returns a DialOption that sets a dialer to create +// connections. If FailOnNonTempDialError() is set to true, and an error is +// returned by f, gRPC checks the error's Temporary() method to decide if it +// should try to reconnect to the network address. +func WithContextDialer(f func(context.Context, string) (net.Conn, error)) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.copts.Dialer = f + }) +} + +func init() { + internal.WithHealthCheckFunc = withHealthCheckFunc +} + +// WithDialer returns a DialOption that specifies a function to use for dialing +// network addresses. If FailOnNonTempDialError() is set to true, and an error +// is returned by f, gRPC checks the error's Temporary() method to decide if it +// should try to reconnect to the network address. +// +// Deprecated: use WithContextDialer instead. Will be supported throughout +// 1.x. +func WithDialer(f func(string, time.Duration) (net.Conn, error)) DialOption { + return WithContextDialer( + func(ctx context.Context, addr string) (net.Conn, error) { + if deadline, ok := ctx.Deadline(); ok { + return f(addr, time.Until(deadline)) + } + return f(addr, 0) + }) +} + +// WithStatsHandler returns a DialOption that specifies the stats handler for +// all the RPCs and underlying network connections in this ClientConn. +func WithStatsHandler(h stats.Handler) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.copts.StatsHandler = h + }) +} + +// FailOnNonTempDialError returns a DialOption that specifies if gRPC fails on +// non-temporary dial errors. If f is true, and dialer returns a non-temporary +// error, gRPC will fail the connection to the network address and won't try to +// reconnect. The default value of FailOnNonTempDialError is false. +// +// FailOnNonTempDialError only affects the initial dial, and does not do +// anything useful unless you are also using WithBlock(). +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func FailOnNonTempDialError(f bool) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.copts.FailOnNonTempDialError = f + }) +} + +// WithUserAgent returns a DialOption that specifies a user agent string for all +// the RPCs. +func WithUserAgent(s string) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.copts.UserAgent = s + }) +} + +// WithKeepaliveParams returns a DialOption that specifies keepalive parameters +// for the client transport. +func WithKeepaliveParams(kp keepalive.ClientParameters) DialOption { + if kp.Time < internal.KeepaliveMinPingTime { + logger.Warningf("Adjusting keepalive ping interval to minimum period of %v", internal.KeepaliveMinPingTime) + kp.Time = internal.KeepaliveMinPingTime + } + return newFuncDialOption(func(o *dialOptions) { + o.copts.KeepaliveParams = kp + }) +} + +// WithUnaryInterceptor returns a DialOption that specifies the interceptor for +// unary RPCs. +func WithUnaryInterceptor(f UnaryClientInterceptor) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.unaryInt = f + }) +} + +// WithChainUnaryInterceptor returns a DialOption that specifies the chained +// interceptor for unary RPCs. The first interceptor will be the outer most, +// while the last interceptor will be the inner most wrapper around the real call. +// All interceptors added by this method will be chained, and the interceptor +// defined by WithUnaryInterceptor will always be prepended to the chain. +func WithChainUnaryInterceptor(interceptors ...UnaryClientInterceptor) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.chainUnaryInts = append(o.chainUnaryInts, interceptors...) + }) +} + +// WithStreamInterceptor returns a DialOption that specifies the interceptor for +// streaming RPCs. +func WithStreamInterceptor(f StreamClientInterceptor) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.streamInt = f + }) +} + +// WithChainStreamInterceptor returns a DialOption that specifies the chained +// interceptor for streaming RPCs. The first interceptor will be the outer most, +// while the last interceptor will be the inner most wrapper around the real call. +// All interceptors added by this method will be chained, and the interceptor +// defined by WithStreamInterceptor will always be prepended to the chain. +func WithChainStreamInterceptor(interceptors ...StreamClientInterceptor) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.chainStreamInts = append(o.chainStreamInts, interceptors...) + }) +} + +// WithAuthority returns a DialOption that specifies the value to be used as the +// :authority pseudo-header. This value only works with WithInsecure and has no +// effect if TransportCredentials are present. +func WithAuthority(a string) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.authority = a + }) +} + +// WithChannelzParentID returns a DialOption that specifies the channelz ID of +// current ClientConn's parent. This function is used in nested channel creation +// (e.g. grpclb dial). +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func WithChannelzParentID(id int64) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.channelzParentID = id + }) +} + +// WithDisableServiceConfig returns a DialOption that causes gRPC to ignore any +// service config provided by the resolver and provides a hint to the resolver +// to not fetch service configs. +// +// Note that this dial option only disables service config from resolver. If +// default service config is provided, gRPC will use the default service config. +func WithDisableServiceConfig() DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.disableServiceConfig = true + }) +} + +// WithDefaultServiceConfig returns a DialOption that configures the default +// service config, which will be used in cases where: +// +// 1. WithDisableServiceConfig is also used. +// 2. Resolver does not return a service config or if the resolver returns an +// invalid service config. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func WithDefaultServiceConfig(s string) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.defaultServiceConfigRawJSON = &s + }) +} + +// WithDisableRetry returns a DialOption that disables retries, even if the +// service config enables them. This does not impact transparent retries, which +// will happen automatically if no data is written to the wire or if the RPC is +// unprocessed by the remote server. +// +// Retry support is currently disabled by default, but will be enabled by +// default in the future. Until then, it may be enabled by setting the +// environment variable "GRPC_GO_RETRY" to "on". +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func WithDisableRetry() DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.disableRetry = true + }) +} + +// WithMaxHeaderListSize returns a DialOption that specifies the maximum +// (uncompressed) size of header list that the client is prepared to accept. +func WithMaxHeaderListSize(s uint32) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.copts.MaxHeaderListSize = &s + }) +} + +// WithDisableHealthCheck disables the LB channel health checking for all +// SubConns of this ClientConn. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func WithDisableHealthCheck() DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.disableHealthCheck = true + }) +} + +// withHealthCheckFunc replaces the default health check function with the +// provided one. It makes tests easier to change the health check function. +// +// For testing purpose only. +func withHealthCheckFunc(f internal.HealthChecker) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.healthCheckFunc = f + }) +} + +func defaultDialOptions() dialOptions { + return dialOptions{ + disableRetry: !envconfig.Retry, + healthCheckFunc: internal.HealthCheckFunc, + copts: transport.ConnectOptions{ + WriteBufferSize: defaultWriteBufSize, + ReadBufferSize: defaultReadBufSize, + }, + resolveNowBackoff: internalbackoff.DefaultExponential.Backoff, + withProxy: true, + } +} + +// withGetMinConnectDeadline specifies the function that clientconn uses to +// get minConnectDeadline. This can be used to make connection attempts happen +// faster/slower. +// +// For testing purpose only. +func withMinConnectDeadline(f func() time.Duration) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.minConnectTimeout = f + }) +} + +// withResolveNowBackoff specifies the function that clientconn uses to backoff +// between successive calls to resolver.ResolveNow(). +// +// For testing purpose only. +func withResolveNowBackoff(f func(int) time.Duration) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.resolveNowBackoff = f + }) +} + +// WithResolvers allows a list of resolver implementations to be registered +// locally with the ClientConn without needing to be globally registered via +// resolver.Register. They will be matched against the scheme used for the +// current Dial only, and will take precedence over the global registry. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func WithResolvers(rs ...resolver.Builder) DialOption { + return newFuncDialOption(func(o *dialOptions) { + o.resolvers = append(o.resolvers, rs...) + }) +} diff --git a/vendor/google.golang.org/grpc/doc.go b/vendor/google.golang.org/grpc/doc.go new file mode 100644 index 000000000..0022859ad --- /dev/null +++ b/vendor/google.golang.org/grpc/doc.go @@ -0,0 +1,26 @@ +/* + * + * Copyright 2015 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +//go:generate ./regenerate.sh + +/* +Package grpc implements an RPC system called gRPC. + +See grpc.io for more information about gRPC. +*/ +package grpc // import "google.golang.org/grpc" diff --git a/vendor/google.golang.org/grpc/encoding/encoding.go b/vendor/google.golang.org/grpc/encoding/encoding.go new file mode 100644 index 000000000..6d84f74c7 --- /dev/null +++ b/vendor/google.golang.org/grpc/encoding/encoding.go @@ -0,0 +1,130 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package encoding defines the interface for the compressor and codec, and +// functions to register and retrieve compressors and codecs. +// +// Experimental +// +// Notice: This package is EXPERIMENTAL and may be changed or removed in a +// later release. +package encoding + +import ( + "io" + "strings" +) + +// Identity specifies the optional encoding for uncompressed streams. +// It is intended for grpc internal use only. +const Identity = "identity" + +// Compressor is used for compressing and decompressing when sending or +// receiving messages. +type Compressor interface { + // Compress writes the data written to wc to w after compressing it. If an + // error occurs while initializing the compressor, that error is returned + // instead. + Compress(w io.Writer) (io.WriteCloser, error) + // Decompress reads data from r, decompresses it, and provides the + // uncompressed data via the returned io.Reader. If an error occurs while + // initializing the decompressor, that error is returned instead. + Decompress(r io.Reader) (io.Reader, error) + // Name is the name of the compression codec and is used to set the content + // coding header. The result must be static; the result cannot change + // between calls. + Name() string + // If a Compressor implements + // DecompressedSize(compressedBytes []byte) int, gRPC will call it + // to determine the size of the buffer allocated for the result of decompression. + // Return -1 to indicate unknown size. + // + // Experimental + // + // Notice: This API is EXPERIMENTAL and may be changed or removed in a + // later release. +} + +var registeredCompressor = make(map[string]Compressor) + +// RegisterCompressor registers the compressor with gRPC by its name. It can +// be activated when sending an RPC via grpc.UseCompressor(). It will be +// automatically accessed when receiving a message based on the content coding +// header. Servers also use it to send a response with the same encoding as +// the request. +// +// NOTE: this function must only be called during initialization time (i.e. in +// an init() function), and is not thread-safe. If multiple Compressors are +// registered with the same name, the one registered last will take effect. +func RegisterCompressor(c Compressor) { + registeredCompressor[c.Name()] = c +} + +// GetCompressor returns Compressor for the given compressor name. +func GetCompressor(name string) Compressor { + return registeredCompressor[name] +} + +// Codec defines the interface gRPC uses to encode and decode messages. Note +// that implementations of this interface must be thread safe; a Codec's +// methods can be called from concurrent goroutines. +type Codec interface { + // Marshal returns the wire format of v. + Marshal(v interface{}) ([]byte, error) + // Unmarshal parses the wire format into v. + Unmarshal(data []byte, v interface{}) error + // Name returns the name of the Codec implementation. The returned string + // will be used as part of content type in transmission. The result must be + // static; the result cannot change between calls. + Name() string +} + +var registeredCodecs = make(map[string]Codec) + +// RegisterCodec registers the provided Codec for use with all gRPC clients and +// servers. +// +// The Codec will be stored and looked up by result of its Name() method, which +// should match the content-subtype of the encoding handled by the Codec. This +// is case-insensitive, and is stored and looked up as lowercase. If the +// result of calling Name() is an empty string, RegisterCodec will panic. See +// Content-Type on +// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests for +// more details. +// +// NOTE: this function must only be called during initialization time (i.e. in +// an init() function), and is not thread-safe. If multiple Compressors are +// registered with the same name, the one registered last will take effect. +func RegisterCodec(codec Codec) { + if codec == nil { + panic("cannot register a nil Codec") + } + if codec.Name() == "" { + panic("cannot register Codec with empty string result for Name()") + } + contentSubtype := strings.ToLower(codec.Name()) + registeredCodecs[contentSubtype] = codec +} + +// GetCodec gets a registered Codec by content-subtype, or nil if no Codec is +// registered for the content-subtype. +// +// The content-subtype is expected to be lowercase. +func GetCodec(contentSubtype string) Codec { + return registeredCodecs[contentSubtype] +} diff --git a/vendor/google.golang.org/grpc/encoding/proto/proto.go b/vendor/google.golang.org/grpc/encoding/proto/proto.go new file mode 100644 index 000000000..66b97a6f6 --- /dev/null +++ b/vendor/google.golang.org/grpc/encoding/proto/proto.go @@ -0,0 +1,110 @@ +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package proto defines the protobuf codec. Importing this package will +// register the codec. +package proto + +import ( + "math" + "sync" + + "github.com/golang/protobuf/proto" + "google.golang.org/grpc/encoding" +) + +// Name is the name registered for the proto compressor. +const Name = "proto" + +func init() { + encoding.RegisterCodec(codec{}) +} + +// codec is a Codec implementation with protobuf. It is the default codec for gRPC. +type codec struct{} + +type cachedProtoBuffer struct { + lastMarshaledSize uint32 + proto.Buffer +} + +func capToMaxInt32(val int) uint32 { + if val > math.MaxInt32 { + return uint32(math.MaxInt32) + } + return uint32(val) +} + +func marshal(v interface{}, cb *cachedProtoBuffer) ([]byte, error) { + protoMsg := v.(proto.Message) + newSlice := make([]byte, 0, cb.lastMarshaledSize) + + cb.SetBuf(newSlice) + cb.Reset() + if err := cb.Marshal(protoMsg); err != nil { + return nil, err + } + out := cb.Bytes() + cb.lastMarshaledSize = capToMaxInt32(len(out)) + return out, nil +} + +func (codec) Marshal(v interface{}) ([]byte, error) { + if pm, ok := v.(proto.Marshaler); ok { + // object can marshal itself, no need for buffer + return pm.Marshal() + } + + cb := protoBufferPool.Get().(*cachedProtoBuffer) + out, err := marshal(v, cb) + + // put back buffer and lose the ref to the slice + cb.SetBuf(nil) + protoBufferPool.Put(cb) + return out, err +} + +func (codec) Unmarshal(data []byte, v interface{}) error { + protoMsg := v.(proto.Message) + protoMsg.Reset() + + if pu, ok := protoMsg.(proto.Unmarshaler); ok { + // object can unmarshal itself, no need for buffer + return pu.Unmarshal(data) + } + + cb := protoBufferPool.Get().(*cachedProtoBuffer) + cb.SetBuf(data) + err := cb.Unmarshal(protoMsg) + cb.SetBuf(nil) + protoBufferPool.Put(cb) + return err +} + +func (codec) Name() string { + return Name +} + +var protoBufferPool = &sync.Pool{ + New: func() interface{} { + return &cachedProtoBuffer{ + Buffer: proto.Buffer{}, + lastMarshaledSize: 16, + } + }, +} diff --git a/vendor/google.golang.org/grpc/go.mod b/vendor/google.golang.org/grpc/go.mod new file mode 100644 index 000000000..d97276556 --- /dev/null +++ b/vendor/google.golang.org/grpc/go.mod @@ -0,0 +1,17 @@ +module google.golang.org/grpc + +go 1.11 + +require ( + github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f + github.com/envoyproxy/go-control-plane v0.9.4 + github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b + github.com/golang/protobuf v1.4.1 + github.com/google/go-cmp v0.5.0 + github.com/google/uuid v1.1.2 + golang.org/x/net v0.0.0-20190311183353-d8887717615a + golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be + golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a + google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013 + google.golang.org/protobuf v1.25.0 +) diff --git a/vendor/google.golang.org/grpc/go.sum b/vendor/google.golang.org/grpc/go.sum new file mode 100644 index 000000000..356a82e3d --- /dev/null +++ b/vendor/google.golang.org/grpc/go.sum @@ -0,0 +1,84 @@ +cloud.google.com/go v0.26.0 h1:e0WKqKTd5BnrG8aKH3J3h+QvEIQtSUcf2n5UZ5ZgLtQ= +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod 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+google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c= +honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= diff --git a/vendor/google.golang.org/grpc/grpclog/component.go b/vendor/google.golang.org/grpc/grpclog/component.go new file mode 100644 index 000000000..8358dd6e2 --- /dev/null +++ b/vendor/google.golang.org/grpc/grpclog/component.go @@ -0,0 +1,117 @@ +/* + * + * Copyright 2020 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpclog + +import ( + "fmt" + + "google.golang.org/grpc/internal/grpclog" +) + +// componentData records the settings for a component. +type componentData struct { + name string +} + +var cache = map[string]*componentData{} + +func (c *componentData) InfoDepth(depth int, args ...interface{}) { + args = append([]interface{}{"[" + string(c.name) + "]"}, args...) + grpclog.InfoDepth(depth+1, args...) +} + +func (c *componentData) WarningDepth(depth int, args ...interface{}) { + args = append([]interface{}{"[" + string(c.name) + "]"}, args...) + grpclog.WarningDepth(depth+1, args...) +} + +func (c *componentData) ErrorDepth(depth int, args ...interface{}) { + args = append([]interface{}{"[" + string(c.name) + "]"}, args...) + grpclog.ErrorDepth(depth+1, args...) +} + +func (c *componentData) FatalDepth(depth int, args ...interface{}) { + args = append([]interface{}{"[" + string(c.name) + "]"}, args...) + grpclog.FatalDepth(depth+1, args...) +} + +func (c *componentData) Info(args ...interface{}) { + c.InfoDepth(1, args...) +} + +func (c *componentData) Warning(args ...interface{}) { + c.WarningDepth(1, args...) +} + +func (c *componentData) Error(args ...interface{}) { + c.ErrorDepth(1, args...) +} + +func (c *componentData) Fatal(args ...interface{}) { + c.FatalDepth(1, args...) +} + +func (c *componentData) Infof(format string, args ...interface{}) { + c.InfoDepth(1, fmt.Sprintf(format, args...)) +} + +func (c *componentData) Warningf(format string, args ...interface{}) { + c.WarningDepth(1, fmt.Sprintf(format, args...)) +} + +func (c *componentData) Errorf(format string, args ...interface{}) { + c.ErrorDepth(1, fmt.Sprintf(format, args...)) +} + +func (c *componentData) Fatalf(format string, args ...interface{}) { + c.FatalDepth(1, fmt.Sprintf(format, args...)) +} + +func (c *componentData) Infoln(args ...interface{}) { + c.InfoDepth(1, args...) +} + +func (c *componentData) Warningln(args ...interface{}) { + c.WarningDepth(1, args...) +} + +func (c *componentData) Errorln(args ...interface{}) { + c.ErrorDepth(1, args...) +} + +func (c *componentData) Fatalln(args ...interface{}) { + c.FatalDepth(1, args...) +} + +func (c *componentData) V(l int) bool { + return V(l) +} + +// Component creates a new component and returns it for logging. If a component +// with the name already exists, nothing will be created and it will be +// returned. SetLoggerV2 will panic if it is called with a logger created by +// Component. +func Component(componentName string) DepthLoggerV2 { + if cData, ok := cache[componentName]; ok { + return cData + } + c := &componentData{componentName} + cache[componentName] = c + return c +} diff --git a/vendor/google.golang.org/grpc/grpclog/grpclog.go b/vendor/google.golang.org/grpc/grpclog/grpclog.go new file mode 100644 index 000000000..c8bb2be34 --- /dev/null +++ b/vendor/google.golang.org/grpc/grpclog/grpclog.go @@ -0,0 +1,132 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package grpclog defines logging for grpc. +// +// All logs in transport and grpclb packages only go to verbose level 2. +// All logs in other packages in grpc are logged in spite of the verbosity level. +// +// In the default logger, +// severity level can be set by environment variable GRPC_GO_LOG_SEVERITY_LEVEL, +// verbosity level can be set by GRPC_GO_LOG_VERBOSITY_LEVEL. +package grpclog // import "google.golang.org/grpc/grpclog" + +import ( + "os" + + "google.golang.org/grpc/internal/grpclog" +) + +func init() { + SetLoggerV2(newLoggerV2()) +} + +// V reports whether verbosity level l is at least the requested verbose level. +func V(l int) bool { + return grpclog.Logger.V(l) +} + +// Info logs to the INFO log. +func Info(args ...interface{}) { + grpclog.Logger.Info(args...) +} + +// Infof logs to the INFO log. Arguments are handled in the manner of fmt.Printf. +func Infof(format string, args ...interface{}) { + grpclog.Logger.Infof(format, args...) +} + +// Infoln logs to the INFO log. Arguments are handled in the manner of fmt.Println. +func Infoln(args ...interface{}) { + grpclog.Logger.Infoln(args...) +} + +// Warning logs to the WARNING log. +func Warning(args ...interface{}) { + grpclog.Logger.Warning(args...) +} + +// Warningf logs to the WARNING log. Arguments are handled in the manner of fmt.Printf. +func Warningf(format string, args ...interface{}) { + grpclog.Logger.Warningf(format, args...) +} + +// Warningln logs to the WARNING log. Arguments are handled in the manner of fmt.Println. +func Warningln(args ...interface{}) { + grpclog.Logger.Warningln(args...) +} + +// Error logs to the ERROR log. +func Error(args ...interface{}) { + grpclog.Logger.Error(args...) +} + +// Errorf logs to the ERROR log. Arguments are handled in the manner of fmt.Printf. +func Errorf(format string, args ...interface{}) { + grpclog.Logger.Errorf(format, args...) +} + +// Errorln logs to the ERROR log. Arguments are handled in the manner of fmt.Println. +func Errorln(args ...interface{}) { + grpclog.Logger.Errorln(args...) +} + +// Fatal logs to the FATAL log. Arguments are handled in the manner of fmt.Print. +// It calls os.Exit() with exit code 1. +func Fatal(args ...interface{}) { + grpclog.Logger.Fatal(args...) + // Make sure fatal logs will exit. + os.Exit(1) +} + +// Fatalf logs to the FATAL log. Arguments are handled in the manner of fmt.Printf. +// It calls os.Exit() with exit code 1. +func Fatalf(format string, args ...interface{}) { + grpclog.Logger.Fatalf(format, args...) + // Make sure fatal logs will exit. + os.Exit(1) +} + +// Fatalln logs to the FATAL log. Arguments are handled in the manner of fmt.Println. +// It calle os.Exit()) with exit code 1. +func Fatalln(args ...interface{}) { + grpclog.Logger.Fatalln(args...) + // Make sure fatal logs will exit. + os.Exit(1) +} + +// Print prints to the logger. Arguments are handled in the manner of fmt.Print. +// +// Deprecated: use Info. +func Print(args ...interface{}) { + grpclog.Logger.Info(args...) +} + +// Printf prints to the logger. Arguments are handled in the manner of fmt.Printf. +// +// Deprecated: use Infof. +func Printf(format string, args ...interface{}) { + grpclog.Logger.Infof(format, args...) +} + +// Println prints to the logger. Arguments are handled in the manner of fmt.Println. +// +// Deprecated: use Infoln. +func Println(args ...interface{}) { + grpclog.Logger.Infoln(args...) +} diff --git a/vendor/google.golang.org/grpc/grpclog/logger.go b/vendor/google.golang.org/grpc/grpclog/logger.go new file mode 100644 index 000000000..ef06a4822 --- /dev/null +++ b/vendor/google.golang.org/grpc/grpclog/logger.go @@ -0,0 +1,87 @@ +/* + * + * Copyright 2015 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpclog + +import "google.golang.org/grpc/internal/grpclog" + +// Logger mimics golang's standard Logger as an interface. +// +// Deprecated: use LoggerV2. +type Logger interface { + Fatal(args ...interface{}) + Fatalf(format string, args ...interface{}) + Fatalln(args ...interface{}) + Print(args ...interface{}) + Printf(format string, args ...interface{}) + Println(args ...interface{}) +} + +// SetLogger sets the logger that is used in grpc. Call only from +// init() functions. +// +// Deprecated: use SetLoggerV2. +func SetLogger(l Logger) { + grpclog.Logger = &loggerWrapper{Logger: l} +} + +// loggerWrapper wraps Logger into a LoggerV2. +type loggerWrapper struct { + Logger +} + +func (g *loggerWrapper) Info(args ...interface{}) { + g.Logger.Print(args...) +} + +func (g *loggerWrapper) Infoln(args ...interface{}) { + g.Logger.Println(args...) +} + +func (g *loggerWrapper) Infof(format string, args ...interface{}) { + g.Logger.Printf(format, args...) +} + +func (g *loggerWrapper) Warning(args ...interface{}) { + g.Logger.Print(args...) +} + +func (g *loggerWrapper) Warningln(args ...interface{}) { + g.Logger.Println(args...) +} + +func (g *loggerWrapper) Warningf(format string, args ...interface{}) { + g.Logger.Printf(format, args...) +} + +func (g *loggerWrapper) Error(args ...interface{}) { + g.Logger.Print(args...) +} + +func (g *loggerWrapper) Errorln(args ...interface{}) { + g.Logger.Println(args...) +} + +func (g *loggerWrapper) Errorf(format string, args ...interface{}) { + g.Logger.Printf(format, args...) +} + +func (g *loggerWrapper) V(l int) bool { + // Returns true for all verbose level. + return true +} diff --git a/vendor/google.golang.org/grpc/grpclog/loggerv2.go b/vendor/google.golang.org/grpc/grpclog/loggerv2.go new file mode 100644 index 000000000..4ee33171e --- /dev/null +++ b/vendor/google.golang.org/grpc/grpclog/loggerv2.go @@ -0,0 +1,221 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpclog + +import ( + "io" + "io/ioutil" + "log" + "os" + "strconv" + + "google.golang.org/grpc/internal/grpclog" +) + +// LoggerV2 does underlying logging work for grpclog. +type LoggerV2 interface { + // Info logs to INFO log. Arguments are handled in the manner of fmt.Print. + Info(args ...interface{}) + // Infoln logs to INFO log. Arguments are handled in the manner of fmt.Println. + Infoln(args ...interface{}) + // Infof logs to INFO log. Arguments are handled in the manner of fmt.Printf. + Infof(format string, args ...interface{}) + // Warning logs to WARNING log. Arguments are handled in the manner of fmt.Print. + Warning(args ...interface{}) + // Warningln logs to WARNING log. Arguments are handled in the manner of fmt.Println. + Warningln(args ...interface{}) + // Warningf logs to WARNING log. Arguments are handled in the manner of fmt.Printf. + Warningf(format string, args ...interface{}) + // Error logs to ERROR log. Arguments are handled in the manner of fmt.Print. + Error(args ...interface{}) + // Errorln logs to ERROR log. Arguments are handled in the manner of fmt.Println. + Errorln(args ...interface{}) + // Errorf logs to ERROR log. Arguments are handled in the manner of fmt.Printf. + Errorf(format string, args ...interface{}) + // Fatal logs to ERROR log. Arguments are handled in the manner of fmt.Print. + // gRPC ensures that all Fatal logs will exit with os.Exit(1). + // Implementations may also call os.Exit() with a non-zero exit code. + Fatal(args ...interface{}) + // Fatalln logs to ERROR log. Arguments are handled in the manner of fmt.Println. + // gRPC ensures that all Fatal logs will exit with os.Exit(1). + // Implementations may also call os.Exit() with a non-zero exit code. + Fatalln(args ...interface{}) + // Fatalf logs to ERROR log. Arguments are handled in the manner of fmt.Printf. + // gRPC ensures that all Fatal logs will exit with os.Exit(1). + // Implementations may also call os.Exit() with a non-zero exit code. + Fatalf(format string, args ...interface{}) + // V reports whether verbosity level l is at least the requested verbose level. + V(l int) bool +} + +// SetLoggerV2 sets logger that is used in grpc to a V2 logger. +// Not mutex-protected, should be called before any gRPC functions. +func SetLoggerV2(l LoggerV2) { + if _, ok := l.(*componentData); ok { + panic("cannot use component logger as grpclog logger") + } + grpclog.Logger = l + grpclog.DepthLogger, _ = l.(grpclog.DepthLoggerV2) +} + +const ( + // infoLog indicates Info severity. + infoLog int = iota + // warningLog indicates Warning severity. + warningLog + // errorLog indicates Error severity. + errorLog + // fatalLog indicates Fatal severity. + fatalLog +) + +// severityName contains the string representation of each severity. +var severityName = []string{ + infoLog: "INFO", + warningLog: "WARNING", + errorLog: "ERROR", + fatalLog: "FATAL", +} + +// loggerT is the default logger used by grpclog. +type loggerT struct { + m []*log.Logger + v int +} + +// NewLoggerV2 creates a loggerV2 with the provided writers. +// Fatal logs will be written to errorW, warningW, infoW, followed by exit(1). +// Error logs will be written to errorW, warningW and infoW. +// Warning logs will be written to warningW and infoW. +// Info logs will be written to infoW. +func NewLoggerV2(infoW, warningW, errorW io.Writer) LoggerV2 { + return NewLoggerV2WithVerbosity(infoW, warningW, errorW, 0) +} + +// NewLoggerV2WithVerbosity creates a loggerV2 with the provided writers and +// verbosity level. +func NewLoggerV2WithVerbosity(infoW, warningW, errorW io.Writer, v int) LoggerV2 { + var m []*log.Logger + m = append(m, log.New(infoW, severityName[infoLog]+": ", log.LstdFlags)) + m = append(m, log.New(io.MultiWriter(infoW, warningW), severityName[warningLog]+": ", log.LstdFlags)) + ew := io.MultiWriter(infoW, warningW, errorW) // ew will be used for error and fatal. + m = append(m, log.New(ew, severityName[errorLog]+": ", log.LstdFlags)) + m = append(m, log.New(ew, severityName[fatalLog]+": ", log.LstdFlags)) + return &loggerT{m: m, v: v} +} + +// newLoggerV2 creates a loggerV2 to be used as default logger. +// All logs are written to stderr. +func newLoggerV2() LoggerV2 { + errorW := ioutil.Discard + warningW := ioutil.Discard + infoW := ioutil.Discard + + logLevel := os.Getenv("GRPC_GO_LOG_SEVERITY_LEVEL") + switch logLevel { + case "", "ERROR", "error": // If env is unset, set level to ERROR. + errorW = os.Stderr + case "WARNING", "warning": + warningW = os.Stderr + case "INFO", "info": + infoW = os.Stderr + } + + var v int + vLevel := os.Getenv("GRPC_GO_LOG_VERBOSITY_LEVEL") + if vl, err := strconv.Atoi(vLevel); err == nil { + v = vl + } + return NewLoggerV2WithVerbosity(infoW, warningW, errorW, v) +} + +func (g *loggerT) Info(args ...interface{}) { + g.m[infoLog].Print(args...) +} + +func (g *loggerT) Infoln(args ...interface{}) { + g.m[infoLog].Println(args...) +} + +func (g *loggerT) Infof(format string, args ...interface{}) { + g.m[infoLog].Printf(format, args...) +} + +func (g *loggerT) Warning(args ...interface{}) { + g.m[warningLog].Print(args...) +} + +func (g *loggerT) Warningln(args ...interface{}) { + g.m[warningLog].Println(args...) +} + +func (g *loggerT) Warningf(format string, args ...interface{}) { + g.m[warningLog].Printf(format, args...) +} + +func (g *loggerT) Error(args ...interface{}) { + g.m[errorLog].Print(args...) +} + +func (g *loggerT) Errorln(args ...interface{}) { + g.m[errorLog].Println(args...) +} + +func (g *loggerT) Errorf(format string, args ...interface{}) { + g.m[errorLog].Printf(format, args...) +} + +func (g *loggerT) Fatal(args ...interface{}) { + g.m[fatalLog].Fatal(args...) + // No need to call os.Exit() again because log.Logger.Fatal() calls os.Exit(). +} + +func (g *loggerT) Fatalln(args ...interface{}) { + g.m[fatalLog].Fatalln(args...) + // No need to call os.Exit() again because log.Logger.Fatal() calls os.Exit(). +} + +func (g *loggerT) Fatalf(format string, args ...interface{}) { + g.m[fatalLog].Fatalf(format, args...) + // No need to call os.Exit() again because log.Logger.Fatal() calls os.Exit(). +} + +func (g *loggerT) V(l int) bool { + return l <= g.v +} + +// DepthLoggerV2 logs at a specified call frame. If a LoggerV2 also implements +// DepthLoggerV2, the below functions will be called with the appropriate stack +// depth set for trivial functions the logger may ignore. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type DepthLoggerV2 interface { + LoggerV2 + // InfoDepth logs to INFO log at the specified depth. Arguments are handled in the manner of fmt.Print. + InfoDepth(depth int, args ...interface{}) + // WarningDepth logs to WARNING log at the specified depth. Arguments are handled in the manner of fmt.Print. + WarningDepth(depth int, args ...interface{}) + // ErrorDetph logs to ERROR log at the specified depth. Arguments are handled in the manner of fmt.Print. + ErrorDepth(depth int, args ...interface{}) + // FatalDepth logs to FATAL log at the specified depth. Arguments are handled in the manner of fmt.Print. + FatalDepth(depth int, args ...interface{}) +} diff --git a/vendor/google.golang.org/grpc/install_gae.sh b/vendor/google.golang.org/grpc/install_gae.sh new file mode 100644 index 000000000..15ff9facd --- /dev/null +++ b/vendor/google.golang.org/grpc/install_gae.sh @@ -0,0 +1,6 @@ +#!/bin/bash + +TMP=$(mktemp -d /tmp/sdk.XXX) \ +&& curl -o $TMP.zip "https://storage.googleapis.com/appengine-sdks/featured/go_appengine_sdk_linux_amd64-1.9.68.zip" \ +&& unzip -q $TMP.zip -d $TMP \ +&& export PATH="$PATH:$TMP/go_appengine" \ No newline at end of file diff --git a/vendor/google.golang.org/grpc/interceptor.go b/vendor/google.golang.org/grpc/interceptor.go new file mode 100644 index 000000000..d1a609e48 --- /dev/null +++ b/vendor/google.golang.org/grpc/interceptor.go @@ -0,0 +1,85 @@ +/* + * + * Copyright 2016 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpc + +import ( + "context" +) + +// UnaryInvoker is called by UnaryClientInterceptor to complete RPCs. +type UnaryInvoker func(ctx context.Context, method string, req, reply interface{}, cc *ClientConn, opts ...CallOption) error + +// UnaryClientInterceptor intercepts the execution of a unary RPC on the client. invoker is the handler to complete the RPC +// and it is the responsibility of the interceptor to call it. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type UnaryClientInterceptor func(ctx context.Context, method string, req, reply interface{}, cc *ClientConn, invoker UnaryInvoker, opts ...CallOption) error + +// Streamer is called by StreamClientInterceptor to create a ClientStream. +type Streamer func(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (ClientStream, error) + +// StreamClientInterceptor intercepts the creation of ClientStream. It may return a custom ClientStream to intercept all I/O +// operations. streamer is the handler to create a ClientStream and it is the responsibility of the interceptor to call it. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type StreamClientInterceptor func(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, streamer Streamer, opts ...CallOption) (ClientStream, error) + +// UnaryServerInfo consists of various information about a unary RPC on +// server side. All per-rpc information may be mutated by the interceptor. +type UnaryServerInfo struct { + // Server is the service implementation the user provides. This is read-only. + Server interface{} + // FullMethod is the full RPC method string, i.e., /package.service/method. + FullMethod string +} + +// UnaryHandler defines the handler invoked by UnaryServerInterceptor to complete the normal +// execution of a unary RPC. If a UnaryHandler returns an error, it should be produced by the +// status package, or else gRPC will use codes.Unknown as the status code and err.Error() as +// the status message of the RPC. +type UnaryHandler func(ctx context.Context, req interface{}) (interface{}, error) + +// UnaryServerInterceptor provides a hook to intercept the execution of a unary RPC on the server. info +// contains all the information of this RPC the interceptor can operate on. And handler is the wrapper +// of the service method implementation. It is the responsibility of the interceptor to invoke handler +// to complete the RPC. +type UnaryServerInterceptor func(ctx context.Context, req interface{}, info *UnaryServerInfo, handler UnaryHandler) (resp interface{}, err error) + +// StreamServerInfo consists of various information about a streaming RPC on +// server side. All per-rpc information may be mutated by the interceptor. +type StreamServerInfo struct { + // FullMethod is the full RPC method string, i.e., /package.service/method. + FullMethod string + // IsClientStream indicates whether the RPC is a client streaming RPC. + IsClientStream bool + // IsServerStream indicates whether the RPC is a server streaming RPC. + IsServerStream bool +} + +// StreamServerInterceptor provides a hook to intercept the execution of a streaming RPC on the server. +// info contains all the information of this RPC the interceptor can operate on. And handler is the +// service method implementation. It is the responsibility of the interceptor to invoke handler to +// complete the RPC. +type StreamServerInterceptor func(srv interface{}, ss ServerStream, info *StreamServerInfo, handler StreamHandler) error diff --git a/vendor/google.golang.org/grpc/internal/backoff/backoff.go b/vendor/google.golang.org/grpc/internal/backoff/backoff.go new file mode 100644 index 000000000..5fc0ee3da --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/backoff/backoff.go @@ -0,0 +1,73 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package backoff implement the backoff strategy for gRPC. +// +// This is kept in internal until the gRPC project decides whether or not to +// allow alternative backoff strategies. +package backoff + +import ( + "time" + + grpcbackoff "google.golang.org/grpc/backoff" + "google.golang.org/grpc/internal/grpcrand" +) + +// Strategy defines the methodology for backing off after a grpc connection +// failure. +type Strategy interface { + // Backoff returns the amount of time to wait before the next retry given + // the number of consecutive failures. + Backoff(retries int) time.Duration +} + +// DefaultExponential is an exponential backoff implementation using the +// default values for all the configurable knobs defined in +// https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md. +var DefaultExponential = Exponential{Config: grpcbackoff.DefaultConfig} + +// Exponential implements exponential backoff algorithm as defined in +// https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md. +type Exponential struct { + // Config contains all options to configure the backoff algorithm. + Config grpcbackoff.Config +} + +// Backoff returns the amount of time to wait before the next retry given the +// number of retries. +func (bc Exponential) Backoff(retries int) time.Duration { + if retries == 0 { + return bc.Config.BaseDelay + } + backoff, max := float64(bc.Config.BaseDelay), float64(bc.Config.MaxDelay) + for backoff < max && retries > 0 { + backoff *= bc.Config.Multiplier + retries-- + } + if backoff > max { + backoff = max + } + // Randomize backoff delays so that if a cluster of requests start at + // the same time, they won't operate in lockstep. + backoff *= 1 + bc.Config.Jitter*(grpcrand.Float64()*2-1) + if backoff < 0 { + return 0 + } + return time.Duration(backoff) +} diff --git a/vendor/google.golang.org/grpc/internal/balancerload/load.go b/vendor/google.golang.org/grpc/internal/balancerload/load.go new file mode 100644 index 000000000..3a905d966 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/balancerload/load.go @@ -0,0 +1,46 @@ +/* + * Copyright 2019 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +// Package balancerload defines APIs to parse server loads in trailers. The +// parsed loads are sent to balancers in DoneInfo. +package balancerload + +import ( + "google.golang.org/grpc/metadata" +) + +// Parser converts loads from metadata into a concrete type. +type Parser interface { + // Parse parses loads from metadata. + Parse(md metadata.MD) interface{} +} + +var parser Parser + +// SetParser sets the load parser. +// +// Not mutex-protected, should be called before any gRPC functions. +func SetParser(lr Parser) { + parser = lr +} + +// Parse calls parser.Read(). +func Parse(md metadata.MD) interface{} { + if parser == nil { + return nil + } + return parser.Parse(md) +} diff --git a/vendor/google.golang.org/grpc/internal/binarylog/binarylog.go b/vendor/google.golang.org/grpc/internal/binarylog/binarylog.go new file mode 100644 index 000000000..5cc3aeddb --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/binarylog/binarylog.go @@ -0,0 +1,170 @@ +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package binarylog implementation binary logging as defined in +// https://github.com/grpc/proposal/blob/master/A16-binary-logging.md. +package binarylog + +import ( + "fmt" + "os" + + "google.golang.org/grpc/grpclog" + "google.golang.org/grpc/internal/grpcutil" +) + +// Logger is the global binary logger. It can be used to get binary logger for +// each method. +type Logger interface { + getMethodLogger(methodName string) *MethodLogger +} + +// binLogger is the global binary logger for the binary. One of this should be +// built at init time from the configuration (environment variable or flags). +// +// It is used to get a methodLogger for each individual method. +var binLogger Logger + +var grpclogLogger = grpclog.Component("binarylog") + +// SetLogger sets the binarg logger. +// +// Only call this at init time. +func SetLogger(l Logger) { + binLogger = l +} + +// GetMethodLogger returns the methodLogger for the given methodName. +// +// methodName should be in the format of "/service/method". +// +// Each methodLogger returned by this method is a new instance. This is to +// generate sequence id within the call. +func GetMethodLogger(methodName string) *MethodLogger { + if binLogger == nil { + return nil + } + return binLogger.getMethodLogger(methodName) +} + +func init() { + const envStr = "GRPC_BINARY_LOG_FILTER" + configStr := os.Getenv(envStr) + binLogger = NewLoggerFromConfigString(configStr) +} + +type methodLoggerConfig struct { + // Max length of header and message. + hdr, msg uint64 +} + +type logger struct { + all *methodLoggerConfig + services map[string]*methodLoggerConfig + methods map[string]*methodLoggerConfig + + blacklist map[string]struct{} +} + +// newEmptyLogger creates an empty logger. The map fields need to be filled in +// using the set* functions. +func newEmptyLogger() *logger { + return &logger{} +} + +// Set method logger for "*". +func (l *logger) setDefaultMethodLogger(ml *methodLoggerConfig) error { + if l.all != nil { + return fmt.Errorf("conflicting global rules found") + } + l.all = ml + return nil +} + +// Set method logger for "service/*". +// +// New methodLogger with same service overrides the old one. +func (l *logger) setServiceMethodLogger(service string, ml *methodLoggerConfig) error { + if _, ok := l.services[service]; ok { + return fmt.Errorf("conflicting service rules for service %v found", service) + } + if l.services == nil { + l.services = make(map[string]*methodLoggerConfig) + } + l.services[service] = ml + return nil +} + +// Set method logger for "service/method". +// +// New methodLogger with same method overrides the old one. +func (l *logger) setMethodMethodLogger(method string, ml *methodLoggerConfig) error { + if _, ok := l.blacklist[method]; ok { + return fmt.Errorf("conflicting blacklist rules for method %v found", method) + } + if _, ok := l.methods[method]; ok { + return fmt.Errorf("conflicting method rules for method %v found", method) + } + if l.methods == nil { + l.methods = make(map[string]*methodLoggerConfig) + } + l.methods[method] = ml + return nil +} + +// Set blacklist method for "-service/method". +func (l *logger) setBlacklist(method string) error { + if _, ok := l.blacklist[method]; ok { + return fmt.Errorf("conflicting blacklist rules for method %v found", method) + } + if _, ok := l.methods[method]; ok { + return fmt.Errorf("conflicting method rules for method %v found", method) + } + if l.blacklist == nil { + l.blacklist = make(map[string]struct{}) + } + l.blacklist[method] = struct{}{} + return nil +} + +// getMethodLogger returns the methodLogger for the given methodName. +// +// methodName should be in the format of "/service/method". +// +// Each methodLogger returned by this method is a new instance. This is to +// generate sequence id within the call. +func (l *logger) getMethodLogger(methodName string) *MethodLogger { + s, m, err := grpcutil.ParseMethod(methodName) + if err != nil { + grpclogLogger.Infof("binarylogging: failed to parse %q: %v", methodName, err) + return nil + } + if ml, ok := l.methods[s+"/"+m]; ok { + return newMethodLogger(ml.hdr, ml.msg) + } + if _, ok := l.blacklist[s+"/"+m]; ok { + return nil + } + if ml, ok := l.services[s]; ok { + return newMethodLogger(ml.hdr, ml.msg) + } + if l.all == nil { + return nil + } + return newMethodLogger(l.all.hdr, l.all.msg) +} diff --git a/vendor/google.golang.org/grpc/internal/binarylog/binarylog_testutil.go b/vendor/google.golang.org/grpc/internal/binarylog/binarylog_testutil.go new file mode 100644 index 000000000..1ee00a39a --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/binarylog/binarylog_testutil.go @@ -0,0 +1,42 @@ +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// This file contains exported variables/functions that are exported for testing +// only. +// +// An ideal way for this would be to put those in a *_test.go but in binarylog +// package. But this doesn't work with staticcheck with go module. Error was: +// "MdToMetadataProto not declared by package binarylog". This could be caused +// by the way staticcheck looks for files for a certain package, which doesn't +// support *_test.go files. +// +// Move those to binary_test.go when staticcheck is fixed. + +package binarylog + +var ( + // AllLogger is a logger that logs all headers/messages for all RPCs. It's + // for testing only. + AllLogger = NewLoggerFromConfigString("*") + // MdToMetadataProto converts metadata to a binary logging proto message. + // It's for testing only. + MdToMetadataProto = mdToMetadataProto + // AddrToProto converts an address to a binary logging proto message. It's + // for testing only. + AddrToProto = addrToProto +) diff --git a/vendor/google.golang.org/grpc/internal/binarylog/env_config.go b/vendor/google.golang.org/grpc/internal/binarylog/env_config.go new file mode 100644 index 000000000..d8f4e7602 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/binarylog/env_config.go @@ -0,0 +1,208 @@ +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package binarylog + +import ( + "errors" + "fmt" + "regexp" + "strconv" + "strings" +) + +// NewLoggerFromConfigString reads the string and build a logger. It can be used +// to build a new logger and assign it to binarylog.Logger. +// +// Example filter config strings: +// - "" Nothing will be logged +// - "*" All headers and messages will be fully logged. +// - "*{h}" Only headers will be logged. +// - "*{m:256}" Only the first 256 bytes of each message will be logged. +// - "Foo/*" Logs every method in service Foo +// - "Foo/*,-Foo/Bar" Logs every method in service Foo except method /Foo/Bar +// - "Foo/*,Foo/Bar{m:256}" Logs the first 256 bytes of each message in method +// /Foo/Bar, logs all headers and messages in every other method in service +// Foo. +// +// If two configs exist for one certain method or service, the one specified +// later overrides the previous config. +func NewLoggerFromConfigString(s string) Logger { + if s == "" { + return nil + } + l := newEmptyLogger() + methods := strings.Split(s, ",") + for _, method := range methods { + if err := l.fillMethodLoggerWithConfigString(method); err != nil { + grpclogLogger.Warningf("failed to parse binary log config: %v", err) + return nil + } + } + return l +} + +// fillMethodLoggerWithConfigString parses config, creates methodLogger and adds +// it to the right map in the logger. +func (l *logger) fillMethodLoggerWithConfigString(config string) error { + // "" is invalid. + if config == "" { + return errors.New("empty string is not a valid method binary logging config") + } + + // "-service/method", blacklist, no * or {} allowed. + if config[0] == '-' { + s, m, suffix, err := parseMethodConfigAndSuffix(config[1:]) + if err != nil { + return fmt.Errorf("invalid config: %q, %v", config, err) + } + if m == "*" { + return fmt.Errorf("invalid config: %q, %v", config, "* not allowed in blacklist config") + } + if suffix != "" { + return fmt.Errorf("invalid config: %q, %v", config, "header/message limit not allowed in blacklist config") + } + if err := l.setBlacklist(s + "/" + m); err != nil { + return fmt.Errorf("invalid config: %v", err) + } + return nil + } + + // "*{h:256;m:256}" + if config[0] == '*' { + hdr, msg, err := parseHeaderMessageLengthConfig(config[1:]) + if err != nil { + return fmt.Errorf("invalid config: %q, %v", config, err) + } + if err := l.setDefaultMethodLogger(&methodLoggerConfig{hdr: hdr, msg: msg}); err != nil { + return fmt.Errorf("invalid config: %v", err) + } + return nil + } + + s, m, suffix, err := parseMethodConfigAndSuffix(config) + if err != nil { + return fmt.Errorf("invalid config: %q, %v", config, err) + } + hdr, msg, err := parseHeaderMessageLengthConfig(suffix) + if err != nil { + return fmt.Errorf("invalid header/message length config: %q, %v", suffix, err) + } + if m == "*" { + if err := l.setServiceMethodLogger(s, &methodLoggerConfig{hdr: hdr, msg: msg}); err != nil { + return fmt.Errorf("invalid config: %v", err) + } + } else { + if err := l.setMethodMethodLogger(s+"/"+m, &methodLoggerConfig{hdr: hdr, msg: msg}); err != nil { + return fmt.Errorf("invalid config: %v", err) + } + } + return nil +} + +const ( + // TODO: this const is only used by env_config now. But could be useful for + // other config. Move to binarylog.go if necessary. + maxUInt = ^uint64(0) + + // For "p.s/m" plus any suffix. Suffix will be parsed again. See test for + // expected output. + longMethodConfigRegexpStr = `^([\w./]+)/((?:\w+)|[*])(.+)?$` + + // For suffix from above, "{h:123,m:123}". See test for expected output. + optionalLengthRegexpStr = `(?::(\d+))?` // Optional ":123". + headerConfigRegexpStr = `^{h` + optionalLengthRegexpStr + `}$` + messageConfigRegexpStr = `^{m` + optionalLengthRegexpStr + `}$` + headerMessageConfigRegexpStr = `^{h` + optionalLengthRegexpStr + `;m` + optionalLengthRegexpStr + `}$` +) + +var ( + longMethodConfigRegexp = regexp.MustCompile(longMethodConfigRegexpStr) + headerConfigRegexp = regexp.MustCompile(headerConfigRegexpStr) + messageConfigRegexp = regexp.MustCompile(messageConfigRegexpStr) + headerMessageConfigRegexp = regexp.MustCompile(headerMessageConfigRegexpStr) +) + +// Turn "service/method{h;m}" into "service", "method", "{h;m}". +func parseMethodConfigAndSuffix(c string) (service, method, suffix string, _ error) { + // Regexp result: + // + // in: "p.s/m{h:123,m:123}", + // out: []string{"p.s/m{h:123,m:123}", "p.s", "m", "{h:123,m:123}"}, + match := longMethodConfigRegexp.FindStringSubmatch(c) + if match == nil { + return "", "", "", fmt.Errorf("%q contains invalid substring", c) + } + service = match[1] + method = match[2] + suffix = match[3] + return +} + +// Turn "{h:123;m:345}" into 123, 345. +// +// Return maxUInt if length is unspecified. +func parseHeaderMessageLengthConfig(c string) (hdrLenStr, msgLenStr uint64, err error) { + if c == "" { + return maxUInt, maxUInt, nil + } + // Header config only. + if match := headerConfigRegexp.FindStringSubmatch(c); match != nil { + if s := match[1]; s != "" { + hdrLenStr, err = strconv.ParseUint(s, 10, 64) + if err != nil { + return 0, 0, fmt.Errorf("failed to convert %q to uint", s) + } + return hdrLenStr, 0, nil + } + return maxUInt, 0, nil + } + + // Message config only. + if match := messageConfigRegexp.FindStringSubmatch(c); match != nil { + if s := match[1]; s != "" { + msgLenStr, err = strconv.ParseUint(s, 10, 64) + if err != nil { + return 0, 0, fmt.Errorf("failed to convert %q to uint", s) + } + return 0, msgLenStr, nil + } + return 0, maxUInt, nil + } + + // Header and message config both. + if match := headerMessageConfigRegexp.FindStringSubmatch(c); match != nil { + // Both hdr and msg are specified, but one or two of them might be empty. + hdrLenStr = maxUInt + msgLenStr = maxUInt + if s := match[1]; s != "" { + hdrLenStr, err = strconv.ParseUint(s, 10, 64) + if err != nil { + return 0, 0, fmt.Errorf("failed to convert %q to uint", s) + } + } + if s := match[2]; s != "" { + msgLenStr, err = strconv.ParseUint(s, 10, 64) + if err != nil { + return 0, 0, fmt.Errorf("failed to convert %q to uint", s) + } + } + return hdrLenStr, msgLenStr, nil + } + return 0, 0, fmt.Errorf("%q contains invalid substring", c) +} diff --git a/vendor/google.golang.org/grpc/internal/binarylog/method_logger.go b/vendor/google.golang.org/grpc/internal/binarylog/method_logger.go new file mode 100644 index 000000000..0cdb41831 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/binarylog/method_logger.go @@ -0,0 +1,422 @@ +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package binarylog + +import ( + "net" + "strings" + "sync/atomic" + "time" + + "github.com/golang/protobuf/proto" + "github.com/golang/protobuf/ptypes" + pb "google.golang.org/grpc/binarylog/grpc_binarylog_v1" + "google.golang.org/grpc/metadata" + "google.golang.org/grpc/status" +) + +type callIDGenerator struct { + id uint64 +} + +func (g *callIDGenerator) next() uint64 { + id := atomic.AddUint64(&g.id, 1) + return id +} + +// reset is for testing only, and doesn't need to be thread safe. +func (g *callIDGenerator) reset() { + g.id = 0 +} + +var idGen callIDGenerator + +// MethodLogger is the sub-logger for each method. +type MethodLogger struct { + headerMaxLen, messageMaxLen uint64 + + callID uint64 + idWithinCallGen *callIDGenerator + + sink Sink // TODO(blog): make this plugable. +} + +func newMethodLogger(h, m uint64) *MethodLogger { + return &MethodLogger{ + headerMaxLen: h, + messageMaxLen: m, + + callID: idGen.next(), + idWithinCallGen: &callIDGenerator{}, + + sink: DefaultSink, // TODO(blog): make it plugable. + } +} + +// Log creates a proto binary log entry, and logs it to the sink. +func (ml *MethodLogger) Log(c LogEntryConfig) { + m := c.toProto() + timestamp, _ := ptypes.TimestampProto(time.Now()) + m.Timestamp = timestamp + m.CallId = ml.callID + m.SequenceIdWithinCall = ml.idWithinCallGen.next() + + switch pay := m.Payload.(type) { + case *pb.GrpcLogEntry_ClientHeader: + m.PayloadTruncated = ml.truncateMetadata(pay.ClientHeader.GetMetadata()) + case *pb.GrpcLogEntry_ServerHeader: + m.PayloadTruncated = ml.truncateMetadata(pay.ServerHeader.GetMetadata()) + case *pb.GrpcLogEntry_Message: + m.PayloadTruncated = ml.truncateMessage(pay.Message) + } + + ml.sink.Write(m) +} + +func (ml *MethodLogger) truncateMetadata(mdPb *pb.Metadata) (truncated bool) { + if ml.headerMaxLen == maxUInt { + return false + } + var ( + bytesLimit = ml.headerMaxLen + index int + ) + // At the end of the loop, index will be the first entry where the total + // size is greater than the limit: + // + // len(entry[:index]) <= ml.hdr && len(entry[:index+1]) > ml.hdr. + for ; index < len(mdPb.Entry); index++ { + entry := mdPb.Entry[index] + if entry.Key == "grpc-trace-bin" { + // "grpc-trace-bin" is a special key. It's kept in the log entry, + // but not counted towards the size limit. + continue + } + currentEntryLen := uint64(len(entry.Value)) + if currentEntryLen > bytesLimit { + break + } + bytesLimit -= currentEntryLen + } + truncated = index < len(mdPb.Entry) + mdPb.Entry = mdPb.Entry[:index] + return truncated +} + +func (ml *MethodLogger) truncateMessage(msgPb *pb.Message) (truncated bool) { + if ml.messageMaxLen == maxUInt { + return false + } + if ml.messageMaxLen >= uint64(len(msgPb.Data)) { + return false + } + msgPb.Data = msgPb.Data[:ml.messageMaxLen] + return true +} + +// LogEntryConfig represents the configuration for binary log entry. +type LogEntryConfig interface { + toProto() *pb.GrpcLogEntry +} + +// ClientHeader configs the binary log entry to be a ClientHeader entry. +type ClientHeader struct { + OnClientSide bool + Header metadata.MD + MethodName string + Authority string + Timeout time.Duration + // PeerAddr is required only when it's on server side. + PeerAddr net.Addr +} + +func (c *ClientHeader) toProto() *pb.GrpcLogEntry { + // This function doesn't need to set all the fields (e.g. seq ID). The Log + // function will set the fields when necessary. + clientHeader := &pb.ClientHeader{ + Metadata: mdToMetadataProto(c.Header), + MethodName: c.MethodName, + Authority: c.Authority, + } + if c.Timeout > 0 { + clientHeader.Timeout = ptypes.DurationProto(c.Timeout) + } + ret := &pb.GrpcLogEntry{ + Type: pb.GrpcLogEntry_EVENT_TYPE_CLIENT_HEADER, + Payload: &pb.GrpcLogEntry_ClientHeader{ + ClientHeader: clientHeader, + }, + } + if c.OnClientSide { + ret.Logger = pb.GrpcLogEntry_LOGGER_CLIENT + } else { + ret.Logger = pb.GrpcLogEntry_LOGGER_SERVER + } + if c.PeerAddr != nil { + ret.Peer = addrToProto(c.PeerAddr) + } + return ret +} + +// ServerHeader configs the binary log entry to be a ServerHeader entry. +type ServerHeader struct { + OnClientSide bool + Header metadata.MD + // PeerAddr is required only when it's on client side. + PeerAddr net.Addr +} + +func (c *ServerHeader) toProto() *pb.GrpcLogEntry { + ret := &pb.GrpcLogEntry{ + Type: pb.GrpcLogEntry_EVENT_TYPE_SERVER_HEADER, + Payload: &pb.GrpcLogEntry_ServerHeader{ + ServerHeader: &pb.ServerHeader{ + Metadata: mdToMetadataProto(c.Header), + }, + }, + } + if c.OnClientSide { + ret.Logger = pb.GrpcLogEntry_LOGGER_CLIENT + } else { + ret.Logger = pb.GrpcLogEntry_LOGGER_SERVER + } + if c.PeerAddr != nil { + ret.Peer = addrToProto(c.PeerAddr) + } + return ret +} + +// ClientMessage configs the binary log entry to be a ClientMessage entry. +type ClientMessage struct { + OnClientSide bool + // Message can be a proto.Message or []byte. Other messages formats are not + // supported. + Message interface{} +} + +func (c *ClientMessage) toProto() *pb.GrpcLogEntry { + var ( + data []byte + err error + ) + if m, ok := c.Message.(proto.Message); ok { + data, err = proto.Marshal(m) + if err != nil { + grpclogLogger.Infof("binarylogging: failed to marshal proto message: %v", err) + } + } else if b, ok := c.Message.([]byte); ok { + data = b + } else { + grpclogLogger.Infof("binarylogging: message to log is neither proto.message nor []byte") + } + ret := &pb.GrpcLogEntry{ + Type: pb.GrpcLogEntry_EVENT_TYPE_CLIENT_MESSAGE, + Payload: &pb.GrpcLogEntry_Message{ + Message: &pb.Message{ + Length: uint32(len(data)), + Data: data, + }, + }, + } + if c.OnClientSide { + ret.Logger = pb.GrpcLogEntry_LOGGER_CLIENT + } else { + ret.Logger = pb.GrpcLogEntry_LOGGER_SERVER + } + return ret +} + +// ServerMessage configs the binary log entry to be a ServerMessage entry. +type ServerMessage struct { + OnClientSide bool + // Message can be a proto.Message or []byte. Other messages formats are not + // supported. + Message interface{} +} + +func (c *ServerMessage) toProto() *pb.GrpcLogEntry { + var ( + data []byte + err error + ) + if m, ok := c.Message.(proto.Message); ok { + data, err = proto.Marshal(m) + if err != nil { + grpclogLogger.Infof("binarylogging: failed to marshal proto message: %v", err) + } + } else if b, ok := c.Message.([]byte); ok { + data = b + } else { + grpclogLogger.Infof("binarylogging: message to log is neither proto.message nor []byte") + } + ret := &pb.GrpcLogEntry{ + Type: pb.GrpcLogEntry_EVENT_TYPE_SERVER_MESSAGE, + Payload: &pb.GrpcLogEntry_Message{ + Message: &pb.Message{ + Length: uint32(len(data)), + Data: data, + }, + }, + } + if c.OnClientSide { + ret.Logger = pb.GrpcLogEntry_LOGGER_CLIENT + } else { + ret.Logger = pb.GrpcLogEntry_LOGGER_SERVER + } + return ret +} + +// ClientHalfClose configs the binary log entry to be a ClientHalfClose entry. +type ClientHalfClose struct { + OnClientSide bool +} + +func (c *ClientHalfClose) toProto() *pb.GrpcLogEntry { + ret := &pb.GrpcLogEntry{ + Type: pb.GrpcLogEntry_EVENT_TYPE_CLIENT_HALF_CLOSE, + Payload: nil, // No payload here. + } + if c.OnClientSide { + ret.Logger = pb.GrpcLogEntry_LOGGER_CLIENT + } else { + ret.Logger = pb.GrpcLogEntry_LOGGER_SERVER + } + return ret +} + +// ServerTrailer configs the binary log entry to be a ServerTrailer entry. +type ServerTrailer struct { + OnClientSide bool + Trailer metadata.MD + // Err is the status error. + Err error + // PeerAddr is required only when it's on client side and the RPC is trailer + // only. + PeerAddr net.Addr +} + +func (c *ServerTrailer) toProto() *pb.GrpcLogEntry { + st, ok := status.FromError(c.Err) + if !ok { + grpclogLogger.Info("binarylogging: error in trailer is not a status error") + } + var ( + detailsBytes []byte + err error + ) + stProto := st.Proto() + if stProto != nil && len(stProto.Details) != 0 { + detailsBytes, err = proto.Marshal(stProto) + if err != nil { + grpclogLogger.Infof("binarylogging: failed to marshal status proto: %v", err) + } + } + ret := &pb.GrpcLogEntry{ + Type: pb.GrpcLogEntry_EVENT_TYPE_SERVER_TRAILER, + Payload: &pb.GrpcLogEntry_Trailer{ + Trailer: &pb.Trailer{ + Metadata: mdToMetadataProto(c.Trailer), + StatusCode: uint32(st.Code()), + StatusMessage: st.Message(), + StatusDetails: detailsBytes, + }, + }, + } + if c.OnClientSide { + ret.Logger = pb.GrpcLogEntry_LOGGER_CLIENT + } else { + ret.Logger = pb.GrpcLogEntry_LOGGER_SERVER + } + if c.PeerAddr != nil { + ret.Peer = addrToProto(c.PeerAddr) + } + return ret +} + +// Cancel configs the binary log entry to be a Cancel entry. +type Cancel struct { + OnClientSide bool +} + +func (c *Cancel) toProto() *pb.GrpcLogEntry { + ret := &pb.GrpcLogEntry{ + Type: pb.GrpcLogEntry_EVENT_TYPE_CANCEL, + Payload: nil, + } + if c.OnClientSide { + ret.Logger = pb.GrpcLogEntry_LOGGER_CLIENT + } else { + ret.Logger = pb.GrpcLogEntry_LOGGER_SERVER + } + return ret +} + +// metadataKeyOmit returns whether the metadata entry with this key should be +// omitted. +func metadataKeyOmit(key string) bool { + switch key { + case "lb-token", ":path", ":authority", "content-encoding", "content-type", "user-agent", "te": + return true + case "grpc-trace-bin": // grpc-trace-bin is special because it's visiable to users. + return false + } + return strings.HasPrefix(key, "grpc-") +} + +func mdToMetadataProto(md metadata.MD) *pb.Metadata { + ret := &pb.Metadata{} + for k, vv := range md { + if metadataKeyOmit(k) { + continue + } + for _, v := range vv { + ret.Entry = append(ret.Entry, + &pb.MetadataEntry{ + Key: k, + Value: []byte(v), + }, + ) + } + } + return ret +} + +func addrToProto(addr net.Addr) *pb.Address { + ret := &pb.Address{} + switch a := addr.(type) { + case *net.TCPAddr: + if a.IP.To4() != nil { + ret.Type = pb.Address_TYPE_IPV4 + } else if a.IP.To16() != nil { + ret.Type = pb.Address_TYPE_IPV6 + } else { + ret.Type = pb.Address_TYPE_UNKNOWN + // Do not set address and port fields. + break + } + ret.Address = a.IP.String() + ret.IpPort = uint32(a.Port) + case *net.UnixAddr: + ret.Type = pb.Address_TYPE_UNIX + ret.Address = a.String() + default: + ret.Type = pb.Address_TYPE_UNKNOWN + } + return ret +} diff --git a/vendor/google.golang.org/grpc/internal/binarylog/sink.go b/vendor/google.golang.org/grpc/internal/binarylog/sink.go new file mode 100644 index 000000000..7d7a3056b --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/binarylog/sink.go @@ -0,0 +1,159 @@ +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package binarylog + +import ( + "bufio" + "encoding/binary" + "io" + "sync" + "time" + + "github.com/golang/protobuf/proto" + pb "google.golang.org/grpc/binarylog/grpc_binarylog_v1" +) + +var ( + // DefaultSink is the sink where the logs will be written to. It's exported + // for the binarylog package to update. + DefaultSink Sink = &noopSink{} // TODO(blog): change this default (file in /tmp). +) + +// Sink writes log entry into the binary log sink. +// +// sink is a copy of the exported binarylog.Sink, to avoid circular dependency. +type Sink interface { + // Write will be called to write the log entry into the sink. + // + // It should be thread-safe so it can be called in parallel. + Write(*pb.GrpcLogEntry) error + // Close will be called when the Sink is replaced by a new Sink. + Close() error +} + +type noopSink struct{} + +func (ns *noopSink) Write(*pb.GrpcLogEntry) error { return nil } +func (ns *noopSink) Close() error { return nil } + +// newWriterSink creates a binary log sink with the given writer. +// +// Write() marshals the proto message and writes it to the given writer. Each +// message is prefixed with a 4 byte big endian unsigned integer as the length. +// +// No buffer is done, Close() doesn't try to close the writer. +func newWriterSink(w io.Writer) Sink { + return &writerSink{out: w} +} + +type writerSink struct { + out io.Writer +} + +func (ws *writerSink) Write(e *pb.GrpcLogEntry) error { + b, err := proto.Marshal(e) + if err != nil { + grpclogLogger.Infof("binary logging: failed to marshal proto message: %v", err) + } + hdr := make([]byte, 4) + binary.BigEndian.PutUint32(hdr, uint32(len(b))) + if _, err := ws.out.Write(hdr); err != nil { + return err + } + if _, err := ws.out.Write(b); err != nil { + return err + } + return nil +} + +func (ws *writerSink) Close() error { return nil } + +type bufferedSink struct { + mu sync.Mutex + closer io.Closer + out Sink // out is built on buf. + buf *bufio.Writer // buf is kept for flush. + + writeStartOnce sync.Once + writeTicker *time.Ticker +} + +func (fs *bufferedSink) Write(e *pb.GrpcLogEntry) error { + // Start the write loop when Write is called. + fs.writeStartOnce.Do(fs.startFlushGoroutine) + fs.mu.Lock() + if err := fs.out.Write(e); err != nil { + fs.mu.Unlock() + return err + } + fs.mu.Unlock() + return nil +} + +const ( + bufFlushDuration = 60 * time.Second +) + +func (fs *bufferedSink) startFlushGoroutine() { + fs.writeTicker = time.NewTicker(bufFlushDuration) + go func() { + for range fs.writeTicker.C { + fs.mu.Lock() + if err := fs.buf.Flush(); err != nil { + grpclogLogger.Warningf("failed to flush to Sink: %v", err) + } + fs.mu.Unlock() + } + }() +} + +func (fs *bufferedSink) Close() error { + if fs.writeTicker != nil { + fs.writeTicker.Stop() + } + fs.mu.Lock() + if err := fs.buf.Flush(); err != nil { + grpclogLogger.Warningf("failed to flush to Sink: %v", err) + } + if err := fs.closer.Close(); err != nil { + grpclogLogger.Warningf("failed to close the underlying WriterCloser: %v", err) + } + if err := fs.out.Close(); err != nil { + grpclogLogger.Warningf("failed to close the Sink: %v", err) + } + fs.mu.Unlock() + return nil +} + +// NewBufferedSink creates a binary log sink with the given WriteCloser. +// +// Write() marshals the proto message and writes it to the given writer. Each +// message is prefixed with a 4 byte big endian unsigned integer as the length. +// +// Content is kept in a buffer, and is flushed every 60 seconds. +// +// Close closes the WriteCloser. +func NewBufferedSink(o io.WriteCloser) Sink { + bufW := bufio.NewWriter(o) + return &bufferedSink{ + closer: o, + out: newWriterSink(bufW), + buf: bufW, + } +} diff --git a/vendor/google.golang.org/grpc/internal/buffer/unbounded.go b/vendor/google.golang.org/grpc/internal/buffer/unbounded.go new file mode 100644 index 000000000..9f6a0c120 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/buffer/unbounded.go @@ -0,0 +1,85 @@ +/* + * Copyright 2019 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package buffer provides an implementation of an unbounded buffer. +package buffer + +import "sync" + +// Unbounded is an implementation of an unbounded buffer which does not use +// extra goroutines. This is typically used for passing updates from one entity +// to another within gRPC. +// +// All methods on this type are thread-safe and don't block on anything except +// the underlying mutex used for synchronization. +// +// Unbounded supports values of any type to be stored in it by using a channel +// of `interface{}`. This means that a call to Put() incurs an extra memory +// allocation, and also that users need a type assertion while reading. For +// performance critical code paths, using Unbounded is strongly discouraged and +// defining a new type specific implementation of this buffer is preferred. See +// internal/transport/transport.go for an example of this. +type Unbounded struct { + c chan interface{} + mu sync.Mutex + backlog []interface{} +} + +// NewUnbounded returns a new instance of Unbounded. +func NewUnbounded() *Unbounded { + return &Unbounded{c: make(chan interface{}, 1)} +} + +// Put adds t to the unbounded buffer. +func (b *Unbounded) Put(t interface{}) { + b.mu.Lock() + if len(b.backlog) == 0 { + select { + case b.c <- t: + b.mu.Unlock() + return + default: + } + } + b.backlog = append(b.backlog, t) + b.mu.Unlock() +} + +// Load sends the earliest buffered data, if any, onto the read channel +// returned by Get(). Users are expected to call this every time they read a +// value from the read channel. +func (b *Unbounded) Load() { + b.mu.Lock() + if len(b.backlog) > 0 { + select { + case b.c <- b.backlog[0]: + b.backlog[0] = nil + b.backlog = b.backlog[1:] + default: + } + } + b.mu.Unlock() +} + +// Get returns a read channel on which values added to the buffer, via Put(), +// are sent on. +// +// Upon reading a value from this channel, users are expected to call Load() to +// send the next buffered value onto the channel if there is any. +func (b *Unbounded) Get() <-chan interface{} { + return b.c +} diff --git a/vendor/google.golang.org/grpc/internal/channelz/funcs.go b/vendor/google.golang.org/grpc/internal/channelz/funcs.go new file mode 100644 index 000000000..f73141393 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/channelz/funcs.go @@ -0,0 +1,737 @@ +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package channelz defines APIs for enabling channelz service, entry +// registration/deletion, and accessing channelz data. It also defines channelz +// metric struct formats. +// +// All APIs in this package are experimental. +package channelz + +import ( + "fmt" + "sort" + "sync" + "sync/atomic" + "time" + + "google.golang.org/grpc/grpclog" +) + +const ( + defaultMaxTraceEntry int32 = 30 +) + +var ( + db dbWrapper + idGen idGenerator + // EntryPerPage defines the number of channelz entries to be shown on a web page. + EntryPerPage = int64(50) + curState int32 + maxTraceEntry = defaultMaxTraceEntry +) + +// TurnOn turns on channelz data collection. +func TurnOn() { + if !IsOn() { + NewChannelzStorage() + atomic.StoreInt32(&curState, 1) + } +} + +// IsOn returns whether channelz data collection is on. +func IsOn() bool { + return atomic.CompareAndSwapInt32(&curState, 1, 1) +} + +// SetMaxTraceEntry sets maximum number of trace entry per entity (i.e. channel/subchannel). +// Setting it to 0 will disable channel tracing. +func SetMaxTraceEntry(i int32) { + atomic.StoreInt32(&maxTraceEntry, i) +} + +// ResetMaxTraceEntryToDefault resets the maximum number of trace entry per entity to default. +func ResetMaxTraceEntryToDefault() { + atomic.StoreInt32(&maxTraceEntry, defaultMaxTraceEntry) +} + +func getMaxTraceEntry() int { + i := atomic.LoadInt32(&maxTraceEntry) + return int(i) +} + +// dbWarpper wraps around a reference to internal channelz data storage, and +// provide synchronized functionality to set and get the reference. +type dbWrapper struct { + mu sync.RWMutex + DB *channelMap +} + +func (d *dbWrapper) set(db *channelMap) { + d.mu.Lock() + d.DB = db + d.mu.Unlock() +} + +func (d *dbWrapper) get() *channelMap { + d.mu.RLock() + defer d.mu.RUnlock() + return d.DB +} + +// NewChannelzStorage initializes channelz data storage and id generator. +// +// This function returns a cleanup function to wait for all channelz state to be reset by the +// grpc goroutines when those entities get closed. By using this cleanup function, we make sure tests +// don't mess up each other, i.e. lingering goroutine from previous test doing entity removal happen +// to remove some entity just register by the new test, since the id space is the same. +// +// Note: This function is exported for testing purpose only. User should not call +// it in most cases. +func NewChannelzStorage() (cleanup func() error) { + db.set(&channelMap{ + topLevelChannels: make(map[int64]struct{}), + channels: make(map[int64]*channel), + listenSockets: make(map[int64]*listenSocket), + normalSockets: make(map[int64]*normalSocket), + servers: make(map[int64]*server), + subChannels: make(map[int64]*subChannel), + }) + idGen.reset() + return func() error { + var err error + cm := db.get() + if cm == nil { + return nil + } + for i := 0; i < 1000; i++ { + cm.mu.Lock() + if len(cm.topLevelChannels) == 0 && len(cm.servers) == 0 && len(cm.channels) == 0 && len(cm.subChannels) == 0 && len(cm.listenSockets) == 0 && len(cm.normalSockets) == 0 { + cm.mu.Unlock() + // all things stored in the channelz map have been cleared. + return nil + } + cm.mu.Unlock() + time.Sleep(10 * time.Millisecond) + } + + cm.mu.Lock() + err = fmt.Errorf("after 10s the channelz map has not been cleaned up yet, topchannels: %d, servers: %d, channels: %d, subchannels: %d, listen sockets: %d, normal sockets: %d", len(cm.topLevelChannels), len(cm.servers), len(cm.channels), len(cm.subChannels), len(cm.listenSockets), len(cm.normalSockets)) + cm.mu.Unlock() + return err + } +} + +// GetTopChannels returns a slice of top channel's ChannelMetric, along with a +// boolean indicating whether there's more top channels to be queried for. +// +// The arg id specifies that only top channel with id at or above it will be included +// in the result. The returned slice is up to a length of the arg maxResults or +// EntryPerPage if maxResults is zero, and is sorted in ascending id order. +func GetTopChannels(id int64, maxResults int64) ([]*ChannelMetric, bool) { + return db.get().GetTopChannels(id, maxResults) +} + +// GetServers returns a slice of server's ServerMetric, along with a +// boolean indicating whether there's more servers to be queried for. +// +// The arg id specifies that only server with id at or above it will be included +// in the result. The returned slice is up to a length of the arg maxResults or +// EntryPerPage if maxResults is zero, and is sorted in ascending id order. +func GetServers(id int64, maxResults int64) ([]*ServerMetric, bool) { + return db.get().GetServers(id, maxResults) +} + +// GetServerSockets returns a slice of server's (identified by id) normal socket's +// SocketMetric, along with a boolean indicating whether there's more sockets to +// be queried for. +// +// The arg startID specifies that only sockets with id at or above it will be +// included in the result. The returned slice is up to a length of the arg maxResults +// or EntryPerPage if maxResults is zero, and is sorted in ascending id order. +func GetServerSockets(id int64, startID int64, maxResults int64) ([]*SocketMetric, bool) { + return db.get().GetServerSockets(id, startID, maxResults) +} + +// GetChannel returns the ChannelMetric for the channel (identified by id). +func GetChannel(id int64) *ChannelMetric { + return db.get().GetChannel(id) +} + +// GetSubChannel returns the SubChannelMetric for the subchannel (identified by id). +func GetSubChannel(id int64) *SubChannelMetric { + return db.get().GetSubChannel(id) +} + +// GetSocket returns the SocketInternalMetric for the socket (identified by id). +func GetSocket(id int64) *SocketMetric { + return db.get().GetSocket(id) +} + +// GetServer returns the ServerMetric for the server (identified by id). +func GetServer(id int64) *ServerMetric { + return db.get().GetServer(id) +} + +// RegisterChannel registers the given channel c in channelz database with ref +// as its reference name, and add it to the child list of its parent (identified +// by pid). pid = 0 means no parent. It returns the unique channelz tracking id +// assigned to this channel. +func RegisterChannel(c Channel, pid int64, ref string) int64 { + id := idGen.genID() + cn := &channel{ + refName: ref, + c: c, + subChans: make(map[int64]string), + nestedChans: make(map[int64]string), + id: id, + pid: pid, + trace: &channelTrace{createdTime: time.Now(), events: make([]*TraceEvent, 0, getMaxTraceEntry())}, + } + if pid == 0 { + db.get().addChannel(id, cn, true, pid, ref) + } else { + db.get().addChannel(id, cn, false, pid, ref) + } + return id +} + +// RegisterSubChannel registers the given channel c in channelz database with ref +// as its reference name, and add it to the child list of its parent (identified +// by pid). It returns the unique channelz tracking id assigned to this subchannel. +func RegisterSubChannel(c Channel, pid int64, ref string) int64 { + if pid == 0 { + logger.Error("a SubChannel's parent id cannot be 0") + return 0 + } + id := idGen.genID() + sc := &subChannel{ + refName: ref, + c: c, + sockets: make(map[int64]string), + id: id, + pid: pid, + trace: &channelTrace{createdTime: time.Now(), events: make([]*TraceEvent, 0, getMaxTraceEntry())}, + } + db.get().addSubChannel(id, sc, pid, ref) + return id +} + +// RegisterServer registers the given server s in channelz database. It returns +// the unique channelz tracking id assigned to this server. +func RegisterServer(s Server, ref string) int64 { + id := idGen.genID() + svr := &server{ + refName: ref, + s: s, + sockets: make(map[int64]string), + listenSockets: make(map[int64]string), + id: id, + } + db.get().addServer(id, svr) + return id +} + +// RegisterListenSocket registers the given listen socket s in channelz database +// with ref as its reference name, and add it to the child list of its parent +// (identified by pid). It returns the unique channelz tracking id assigned to +// this listen socket. +func RegisterListenSocket(s Socket, pid int64, ref string) int64 { + if pid == 0 { + logger.Error("a ListenSocket's parent id cannot be 0") + return 0 + } + id := idGen.genID() + ls := &listenSocket{refName: ref, s: s, id: id, pid: pid} + db.get().addListenSocket(id, ls, pid, ref) + return id +} + +// RegisterNormalSocket registers the given normal socket s in channelz database +// with ref as its reference name, and add it to the child list of its parent +// (identified by pid). It returns the unique channelz tracking id assigned to +// this normal socket. +func RegisterNormalSocket(s Socket, pid int64, ref string) int64 { + if pid == 0 { + logger.Error("a NormalSocket's parent id cannot be 0") + return 0 + } + id := idGen.genID() + ns := &normalSocket{refName: ref, s: s, id: id, pid: pid} + db.get().addNormalSocket(id, ns, pid, ref) + return id +} + +// RemoveEntry removes an entry with unique channelz trakcing id to be id from +// channelz database. +func RemoveEntry(id int64) { + db.get().removeEntry(id) +} + +// TraceEventDesc is what the caller of AddTraceEvent should provide to describe the event to be added +// to the channel trace. +// The Parent field is optional. It is used for event that will be recorded in the entity's parent +// trace also. +type TraceEventDesc struct { + Desc string + Severity Severity + Parent *TraceEventDesc +} + +// AddTraceEvent adds trace related to the entity with specified id, using the provided TraceEventDesc. +func AddTraceEvent(l grpclog.DepthLoggerV2, id int64, depth int, desc *TraceEventDesc) { + for d := desc; d != nil; d = d.Parent { + switch d.Severity { + case CtUnknown, CtInfo: + l.InfoDepth(depth+1, d.Desc) + case CtWarning: + l.WarningDepth(depth+1, d.Desc) + case CtError: + l.ErrorDepth(depth+1, d.Desc) + } + } + if getMaxTraceEntry() == 0 { + return + } + db.get().traceEvent(id, desc) +} + +// channelMap is the storage data structure for channelz. +// Methods of channelMap can be divided in two two categories with respect to locking. +// 1. Methods acquire the global lock. +// 2. Methods that can only be called when global lock is held. +// A second type of method need always to be called inside a first type of method. +type channelMap struct { + mu sync.RWMutex + topLevelChannels map[int64]struct{} + servers map[int64]*server + channels map[int64]*channel + subChannels map[int64]*subChannel + listenSockets map[int64]*listenSocket + normalSockets map[int64]*normalSocket +} + +func (c *channelMap) addServer(id int64, s *server) { + c.mu.Lock() + s.cm = c + c.servers[id] = s + c.mu.Unlock() +} + +func (c *channelMap) addChannel(id int64, cn *channel, isTopChannel bool, pid int64, ref string) { + c.mu.Lock() + cn.cm = c + cn.trace.cm = c + c.channels[id] = cn + if isTopChannel { + c.topLevelChannels[id] = struct{}{} + } else { + c.findEntry(pid).addChild(id, cn) + } + c.mu.Unlock() +} + +func (c *channelMap) addSubChannel(id int64, sc *subChannel, pid int64, ref string) { + c.mu.Lock() + sc.cm = c + sc.trace.cm = c + c.subChannels[id] = sc + c.findEntry(pid).addChild(id, sc) + c.mu.Unlock() +} + +func (c *channelMap) addListenSocket(id int64, ls *listenSocket, pid int64, ref string) { + c.mu.Lock() + ls.cm = c + c.listenSockets[id] = ls + c.findEntry(pid).addChild(id, ls) + c.mu.Unlock() +} + +func (c *channelMap) addNormalSocket(id int64, ns *normalSocket, pid int64, ref string) { + c.mu.Lock() + ns.cm = c + c.normalSockets[id] = ns + c.findEntry(pid).addChild(id, ns) + c.mu.Unlock() +} + +// removeEntry triggers the removal of an entry, which may not indeed delete the entry, if it has to +// wait on the deletion of its children and until no other entity's channel trace references it. +// It may lead to a chain of entry deletion. For example, deleting the last socket of a gracefully +// shutting down server will lead to the server being also deleted. +func (c *channelMap) removeEntry(id int64) { + c.mu.Lock() + c.findEntry(id).triggerDelete() + c.mu.Unlock() +} + +// c.mu must be held by the caller +func (c *channelMap) decrTraceRefCount(id int64) { + e := c.findEntry(id) + if v, ok := e.(tracedChannel); ok { + v.decrTraceRefCount() + e.deleteSelfIfReady() + } +} + +// c.mu must be held by the caller. +func (c *channelMap) findEntry(id int64) entry { + var v entry + var ok bool + if v, ok = c.channels[id]; ok { + return v + } + if v, ok = c.subChannels[id]; ok { + return v + } + if v, ok = c.servers[id]; ok { + return v + } + if v, ok = c.listenSockets[id]; ok { + return v + } + if v, ok = c.normalSockets[id]; ok { + return v + } + return &dummyEntry{idNotFound: id} +} + +// c.mu must be held by the caller +// deleteEntry simply deletes an entry from the channelMap. Before calling this +// method, caller must check this entry is ready to be deleted, i.e removeEntry() +// has been called on it, and no children still exist. +// Conditionals are ordered by the expected frequency of deletion of each entity +// type, in order to optimize performance. +func (c *channelMap) deleteEntry(id int64) { + var ok bool + if _, ok = c.normalSockets[id]; ok { + delete(c.normalSockets, id) + return + } + if _, ok = c.subChannels[id]; ok { + delete(c.subChannels, id) + return + } + if _, ok = c.channels[id]; ok { + delete(c.channels, id) + delete(c.topLevelChannels, id) + return + } + if _, ok = c.listenSockets[id]; ok { + delete(c.listenSockets, id) + return + } + if _, ok = c.servers[id]; ok { + delete(c.servers, id) + return + } +} + +func (c *channelMap) traceEvent(id int64, desc *TraceEventDesc) { + c.mu.Lock() + child := c.findEntry(id) + childTC, ok := child.(tracedChannel) + if !ok { + c.mu.Unlock() + return + } + childTC.getChannelTrace().append(&TraceEvent{Desc: desc.Desc, Severity: desc.Severity, Timestamp: time.Now()}) + if desc.Parent != nil { + parent := c.findEntry(child.getParentID()) + var chanType RefChannelType + switch child.(type) { + case *channel: + chanType = RefChannel + case *subChannel: + chanType = RefSubChannel + } + if parentTC, ok := parent.(tracedChannel); ok { + parentTC.getChannelTrace().append(&TraceEvent{ + Desc: desc.Parent.Desc, + Severity: desc.Parent.Severity, + Timestamp: time.Now(), + RefID: id, + RefName: childTC.getRefName(), + RefType: chanType, + }) + childTC.incrTraceRefCount() + } + } + c.mu.Unlock() +} + +type int64Slice []int64 + +func (s int64Slice) Len() int { return len(s) } +func (s int64Slice) Swap(i, j int) { s[i], s[j] = s[j], s[i] } +func (s int64Slice) Less(i, j int) bool { return s[i] < s[j] } + +func copyMap(m map[int64]string) map[int64]string { + n := make(map[int64]string) + for k, v := range m { + n[k] = v + } + return n +} + +func min(a, b int64) int64 { + if a < b { + return a + } + return b +} + +func (c *channelMap) GetTopChannels(id int64, maxResults int64) ([]*ChannelMetric, bool) { + if maxResults <= 0 { + maxResults = EntryPerPage + } + c.mu.RLock() + l := int64(len(c.topLevelChannels)) + ids := make([]int64, 0, l) + cns := make([]*channel, 0, min(l, maxResults)) + + for k := range c.topLevelChannels { + ids = append(ids, k) + } + sort.Sort(int64Slice(ids)) + idx := sort.Search(len(ids), func(i int) bool { return ids[i] >= id }) + count := int64(0) + var end bool + var t []*ChannelMetric + for i, v := range ids[idx:] { + if count == maxResults { + break + } + if cn, ok := c.channels[v]; ok { + cns = append(cns, cn) + t = append(t, &ChannelMetric{ + NestedChans: copyMap(cn.nestedChans), + SubChans: copyMap(cn.subChans), + }) + count++ + } + if i == len(ids[idx:])-1 { + end = true + break + } + } + c.mu.RUnlock() + if count == 0 { + end = true + } + + for i, cn := range cns { + t[i].ChannelData = cn.c.ChannelzMetric() + t[i].ID = cn.id + t[i].RefName = cn.refName + t[i].Trace = cn.trace.dumpData() + } + return t, end +} + +func (c *channelMap) GetServers(id, maxResults int64) ([]*ServerMetric, bool) { + if maxResults <= 0 { + maxResults = EntryPerPage + } + c.mu.RLock() + l := int64(len(c.servers)) + ids := make([]int64, 0, l) + ss := make([]*server, 0, min(l, maxResults)) + for k := range c.servers { + ids = append(ids, k) + } + sort.Sort(int64Slice(ids)) + idx := sort.Search(len(ids), func(i int) bool { return ids[i] >= id }) + count := int64(0) + var end bool + var s []*ServerMetric + for i, v := range ids[idx:] { + if count == maxResults { + break + } + if svr, ok := c.servers[v]; ok { + ss = append(ss, svr) + s = append(s, &ServerMetric{ + ListenSockets: copyMap(svr.listenSockets), + }) + count++ + } + if i == len(ids[idx:])-1 { + end = true + break + } + } + c.mu.RUnlock() + if count == 0 { + end = true + } + + for i, svr := range ss { + s[i].ServerData = svr.s.ChannelzMetric() + s[i].ID = svr.id + s[i].RefName = svr.refName + } + return s, end +} + +func (c *channelMap) GetServerSockets(id int64, startID int64, maxResults int64) ([]*SocketMetric, bool) { + if maxResults <= 0 { + maxResults = EntryPerPage + } + var svr *server + var ok bool + c.mu.RLock() + if svr, ok = c.servers[id]; !ok { + // server with id doesn't exist. + c.mu.RUnlock() + return nil, true + } + svrskts := svr.sockets + l := int64(len(svrskts)) + ids := make([]int64, 0, l) + sks := make([]*normalSocket, 0, min(l, maxResults)) + for k := range svrskts { + ids = append(ids, k) + } + sort.Sort(int64Slice(ids)) + idx := sort.Search(len(ids), func(i int) bool { return ids[i] >= startID }) + count := int64(0) + var end bool + for i, v := range ids[idx:] { + if count == maxResults { + break + } + if ns, ok := c.normalSockets[v]; ok { + sks = append(sks, ns) + count++ + } + if i == len(ids[idx:])-1 { + end = true + break + } + } + c.mu.RUnlock() + if count == 0 { + end = true + } + var s []*SocketMetric + for _, ns := range sks { + sm := &SocketMetric{} + sm.SocketData = ns.s.ChannelzMetric() + sm.ID = ns.id + sm.RefName = ns.refName + s = append(s, sm) + } + return s, end +} + +func (c *channelMap) GetChannel(id int64) *ChannelMetric { + cm := &ChannelMetric{} + var cn *channel + var ok bool + c.mu.RLock() + if cn, ok = c.channels[id]; !ok { + // channel with id doesn't exist. + c.mu.RUnlock() + return nil + } + cm.NestedChans = copyMap(cn.nestedChans) + cm.SubChans = copyMap(cn.subChans) + // cn.c can be set to &dummyChannel{} when deleteSelfFromMap is called. Save a copy of cn.c when + // holding the lock to prevent potential data race. + chanCopy := cn.c + c.mu.RUnlock() + cm.ChannelData = chanCopy.ChannelzMetric() + cm.ID = cn.id + cm.RefName = cn.refName + cm.Trace = cn.trace.dumpData() + return cm +} + +func (c *channelMap) GetSubChannel(id int64) *SubChannelMetric { + cm := &SubChannelMetric{} + var sc *subChannel + var ok bool + c.mu.RLock() + if sc, ok = c.subChannels[id]; !ok { + // subchannel with id doesn't exist. + c.mu.RUnlock() + return nil + } + cm.Sockets = copyMap(sc.sockets) + // sc.c can be set to &dummyChannel{} when deleteSelfFromMap is called. Save a copy of sc.c when + // holding the lock to prevent potential data race. + chanCopy := sc.c + c.mu.RUnlock() + cm.ChannelData = chanCopy.ChannelzMetric() + cm.ID = sc.id + cm.RefName = sc.refName + cm.Trace = sc.trace.dumpData() + return cm +} + +func (c *channelMap) GetSocket(id int64) *SocketMetric { + sm := &SocketMetric{} + c.mu.RLock() + if ls, ok := c.listenSockets[id]; ok { + c.mu.RUnlock() + sm.SocketData = ls.s.ChannelzMetric() + sm.ID = ls.id + sm.RefName = ls.refName + return sm + } + if ns, ok := c.normalSockets[id]; ok { + c.mu.RUnlock() + sm.SocketData = ns.s.ChannelzMetric() + sm.ID = ns.id + sm.RefName = ns.refName + return sm + } + c.mu.RUnlock() + return nil +} + +func (c *channelMap) GetServer(id int64) *ServerMetric { + sm := &ServerMetric{} + var svr *server + var ok bool + c.mu.RLock() + if svr, ok = c.servers[id]; !ok { + c.mu.RUnlock() + return nil + } + sm.ListenSockets = copyMap(svr.listenSockets) + c.mu.RUnlock() + sm.ID = svr.id + sm.RefName = svr.refName + sm.ServerData = svr.s.ChannelzMetric() + return sm +} + +type idGenerator struct { + id int64 +} + +func (i *idGenerator) reset() { + atomic.StoreInt64(&i.id, 0) +} + +func (i *idGenerator) genID() int64 { + return atomic.AddInt64(&i.id, 1) +} diff --git a/vendor/google.golang.org/grpc/internal/channelz/logging.go b/vendor/google.golang.org/grpc/internal/channelz/logging.go new file mode 100644 index 000000000..b0013f9c8 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/channelz/logging.go @@ -0,0 +1,102 @@ +/* + * + * Copyright 2020 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package channelz + +import ( + "fmt" + + "google.golang.org/grpc/grpclog" +) + +var logger = grpclog.Component("channelz") + +// Info logs and adds a trace event if channelz is on. +func Info(l grpclog.DepthLoggerV2, id int64, args ...interface{}) { + if IsOn() { + AddTraceEvent(l, id, 1, &TraceEventDesc{ + Desc: fmt.Sprint(args...), + Severity: CtInfo, + }) + } else { + l.InfoDepth(1, args...) + } +} + +// Infof logs and adds a trace event if channelz is on. +func Infof(l grpclog.DepthLoggerV2, id int64, format string, args ...interface{}) { + msg := fmt.Sprintf(format, args...) + if IsOn() { + AddTraceEvent(l, id, 1, &TraceEventDesc{ + Desc: msg, + Severity: CtInfo, + }) + } else { + l.InfoDepth(1, msg) + } +} + +// Warning logs and adds a trace event if channelz is on. +func Warning(l grpclog.DepthLoggerV2, id int64, args ...interface{}) { + if IsOn() { + AddTraceEvent(l, id, 1, &TraceEventDesc{ + Desc: fmt.Sprint(args...), + Severity: CtWarning, + }) + } else { + l.WarningDepth(1, args...) + } +} + +// Warningf logs and adds a trace event if channelz is on. +func Warningf(l grpclog.DepthLoggerV2, id int64, format string, args ...interface{}) { + msg := fmt.Sprintf(format, args...) + if IsOn() { + AddTraceEvent(l, id, 1, &TraceEventDesc{ + Desc: msg, + Severity: CtWarning, + }) + } else { + l.WarningDepth(1, msg) + } +} + +// Error logs and adds a trace event if channelz is on. +func Error(l grpclog.DepthLoggerV2, id int64, args ...interface{}) { + if IsOn() { + AddTraceEvent(l, id, 1, &TraceEventDesc{ + Desc: fmt.Sprint(args...), + Severity: CtError, + }) + } else { + l.ErrorDepth(1, args...) + } +} + +// Errorf logs and adds a trace event if channelz is on. +func Errorf(l grpclog.DepthLoggerV2, id int64, format string, args ...interface{}) { + msg := fmt.Sprintf(format, args...) + if IsOn() { + AddTraceEvent(l, id, 1, &TraceEventDesc{ + Desc: msg, + Severity: CtError, + }) + } else { + l.ErrorDepth(1, msg) + } +} diff --git a/vendor/google.golang.org/grpc/internal/channelz/types.go b/vendor/google.golang.org/grpc/internal/channelz/types.go new file mode 100644 index 000000000..3c595d154 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/channelz/types.go @@ -0,0 +1,701 @@ +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package channelz + +import ( + "net" + "sync" + "sync/atomic" + "time" + + "google.golang.org/grpc/connectivity" + "google.golang.org/grpc/credentials" +) + +// entry represents a node in the channelz database. +type entry interface { + // addChild adds a child e, whose channelz id is id to child list + addChild(id int64, e entry) + // deleteChild deletes a child with channelz id to be id from child list + deleteChild(id int64) + // triggerDelete tries to delete self from channelz database. However, if child + // list is not empty, then deletion from the database is on hold until the last + // child is deleted from database. + triggerDelete() + // deleteSelfIfReady check whether triggerDelete() has been called before, and whether child + // list is now empty. If both conditions are met, then delete self from database. + deleteSelfIfReady() + // getParentID returns parent ID of the entry. 0 value parent ID means no parent. + getParentID() int64 +} + +// dummyEntry is a fake entry to handle entry not found case. +type dummyEntry struct { + idNotFound int64 +} + +func (d *dummyEntry) addChild(id int64, e entry) { + // Note: It is possible for a normal program to reach here under race condition. + // For example, there could be a race between ClientConn.Close() info being propagated + // to addrConn and http2Client. ClientConn.Close() cancel the context and result + // in http2Client to error. The error info is then caught by transport monitor + // and before addrConn.tearDown() is called in side ClientConn.Close(). Therefore, + // the addrConn will create a new transport. And when registering the new transport in + // channelz, its parent addrConn could have already been torn down and deleted + // from channelz tracking, and thus reach the code here. + logger.Infof("attempt to add child of type %T with id %d to a parent (id=%d) that doesn't currently exist", e, id, d.idNotFound) +} + +func (d *dummyEntry) deleteChild(id int64) { + // It is possible for a normal program to reach here under race condition. + // Refer to the example described in addChild(). + logger.Infof("attempt to delete child with id %d from a parent (id=%d) that doesn't currently exist", id, d.idNotFound) +} + +func (d *dummyEntry) triggerDelete() { + logger.Warningf("attempt to delete an entry (id=%d) that doesn't currently exist", d.idNotFound) +} + +func (*dummyEntry) deleteSelfIfReady() { + // code should not reach here. deleteSelfIfReady is always called on an existing entry. +} + +func (*dummyEntry) getParentID() int64 { + return 0 +} + +// ChannelMetric defines the info channelz provides for a specific Channel, which +// includes ChannelInternalMetric and channelz-specific data, such as channelz id, +// child list, etc. +type ChannelMetric struct { + // ID is the channelz id of this channel. + ID int64 + // RefName is the human readable reference string of this channel. + RefName string + // ChannelData contains channel internal metric reported by the channel through + // ChannelzMetric(). + ChannelData *ChannelInternalMetric + // NestedChans tracks the nested channel type children of this channel in the format of + // a map from nested channel channelz id to corresponding reference string. + NestedChans map[int64]string + // SubChans tracks the subchannel type children of this channel in the format of a + // map from subchannel channelz id to corresponding reference string. + SubChans map[int64]string + // Sockets tracks the socket type children of this channel in the format of a map + // from socket channelz id to corresponding reference string. + // Note current grpc implementation doesn't allow channel having sockets directly, + // therefore, this is field is unused. + Sockets map[int64]string + // Trace contains the most recent traced events. + Trace *ChannelTrace +} + +// SubChannelMetric defines the info channelz provides for a specific SubChannel, +// which includes ChannelInternalMetric and channelz-specific data, such as +// channelz id, child list, etc. +type SubChannelMetric struct { + // ID is the channelz id of this subchannel. + ID int64 + // RefName is the human readable reference string of this subchannel. + RefName string + // ChannelData contains subchannel internal metric reported by the subchannel + // through ChannelzMetric(). + ChannelData *ChannelInternalMetric + // NestedChans tracks the nested channel type children of this subchannel in the format of + // a map from nested channel channelz id to corresponding reference string. + // Note current grpc implementation doesn't allow subchannel to have nested channels + // as children, therefore, this field is unused. + NestedChans map[int64]string + // SubChans tracks the subchannel type children of this subchannel in the format of a + // map from subchannel channelz id to corresponding reference string. + // Note current grpc implementation doesn't allow subchannel to have subchannels + // as children, therefore, this field is unused. + SubChans map[int64]string + // Sockets tracks the socket type children of this subchannel in the format of a map + // from socket channelz id to corresponding reference string. + Sockets map[int64]string + // Trace contains the most recent traced events. + Trace *ChannelTrace +} + +// ChannelInternalMetric defines the struct that the implementor of Channel interface +// should return from ChannelzMetric(). +type ChannelInternalMetric struct { + // current connectivity state of the channel. + State connectivity.State + // The target this channel originally tried to connect to. May be absent + Target string + // The number of calls started on the channel. + CallsStarted int64 + // The number of calls that have completed with an OK status. + CallsSucceeded int64 + // The number of calls that have a completed with a non-OK status. + CallsFailed int64 + // The last time a call was started on the channel. + LastCallStartedTimestamp time.Time +} + +// ChannelTrace stores traced events on a channel/subchannel and related info. +type ChannelTrace struct { + // EventNum is the number of events that ever got traced (i.e. including those that have been deleted) + EventNum int64 + // CreationTime is the creation time of the trace. + CreationTime time.Time + // Events stores the most recent trace events (up to $maxTraceEntry, newer event will overwrite the + // oldest one) + Events []*TraceEvent +} + +// TraceEvent represent a single trace event +type TraceEvent struct { + // Desc is a simple description of the trace event. + Desc string + // Severity states the severity of this trace event. + Severity Severity + // Timestamp is the event time. + Timestamp time.Time + // RefID is the id of the entity that gets referenced in the event. RefID is 0 if no other entity is + // involved in this event. + // e.g. SubChannel (id: 4[]) Created. --> RefID = 4, RefName = "" (inside []) + RefID int64 + // RefName is the reference name for the entity that gets referenced in the event. + RefName string + // RefType indicates the referenced entity type, i.e Channel or SubChannel. + RefType RefChannelType +} + +// Channel is the interface that should be satisfied in order to be tracked by +// channelz as Channel or SubChannel. +type Channel interface { + ChannelzMetric() *ChannelInternalMetric +} + +type dummyChannel struct{} + +func (d *dummyChannel) ChannelzMetric() *ChannelInternalMetric { + return &ChannelInternalMetric{} +} + +type channel struct { + refName string + c Channel + closeCalled bool + nestedChans map[int64]string + subChans map[int64]string + id int64 + pid int64 + cm *channelMap + trace *channelTrace + // traceRefCount is the number of trace events that reference this channel. + // Non-zero traceRefCount means the trace of this channel cannot be deleted. + traceRefCount int32 +} + +func (c *channel) addChild(id int64, e entry) { + switch v := e.(type) { + case *subChannel: + c.subChans[id] = v.refName + case *channel: + c.nestedChans[id] = v.refName + default: + logger.Errorf("cannot add a child (id = %d) of type %T to a channel", id, e) + } +} + +func (c *channel) deleteChild(id int64) { + delete(c.subChans, id) + delete(c.nestedChans, id) + c.deleteSelfIfReady() +} + +func (c *channel) triggerDelete() { + c.closeCalled = true + c.deleteSelfIfReady() +} + +func (c *channel) getParentID() int64 { + return c.pid +} + +// deleteSelfFromTree tries to delete the channel from the channelz entry relation tree, which means +// deleting the channel reference from its parent's child list. +// +// In order for a channel to be deleted from the tree, it must meet the criteria that, removal of the +// corresponding grpc object has been invoked, and the channel does not have any children left. +// +// The returned boolean value indicates whether the channel has been successfully deleted from tree. +func (c *channel) deleteSelfFromTree() (deleted bool) { + if !c.closeCalled || len(c.subChans)+len(c.nestedChans) != 0 { + return false + } + // not top channel + if c.pid != 0 { + c.cm.findEntry(c.pid).deleteChild(c.id) + } + return true +} + +// deleteSelfFromMap checks whether it is valid to delete the channel from the map, which means +// deleting the channel from channelz's tracking entirely. Users can no longer use id to query the +// channel, and its memory will be garbage collected. +// +// The trace reference count of the channel must be 0 in order to be deleted from the map. This is +// specified in the channel tracing gRFC that as long as some other trace has reference to an entity, +// the trace of the referenced entity must not be deleted. In order to release the resource allocated +// by grpc, the reference to the grpc object is reset to a dummy object. +// +// deleteSelfFromMap must be called after deleteSelfFromTree returns true. +// +// It returns a bool to indicate whether the channel can be safely deleted from map. +func (c *channel) deleteSelfFromMap() (delete bool) { + if c.getTraceRefCount() != 0 { + c.c = &dummyChannel{} + return false + } + return true +} + +// deleteSelfIfReady tries to delete the channel itself from the channelz database. +// The delete process includes two steps: +// 1. delete the channel from the entry relation tree, i.e. delete the channel reference from its +// parent's child list. +// 2. delete the channel from the map, i.e. delete the channel entirely from channelz. Lookup by id +// will return entry not found error. +func (c *channel) deleteSelfIfReady() { + if !c.deleteSelfFromTree() { + return + } + if !c.deleteSelfFromMap() { + return + } + c.cm.deleteEntry(c.id) + c.trace.clear() +} + +func (c *channel) getChannelTrace() *channelTrace { + return c.trace +} + +func (c *channel) incrTraceRefCount() { + atomic.AddInt32(&c.traceRefCount, 1) +} + +func (c *channel) decrTraceRefCount() { + atomic.AddInt32(&c.traceRefCount, -1) +} + +func (c *channel) getTraceRefCount() int { + i := atomic.LoadInt32(&c.traceRefCount) + return int(i) +} + +func (c *channel) getRefName() string { + return c.refName +} + +type subChannel struct { + refName string + c Channel + closeCalled bool + sockets map[int64]string + id int64 + pid int64 + cm *channelMap + trace *channelTrace + traceRefCount int32 +} + +func (sc *subChannel) addChild(id int64, e entry) { + if v, ok := e.(*normalSocket); ok { + sc.sockets[id] = v.refName + } else { + logger.Errorf("cannot add a child (id = %d) of type %T to a subChannel", id, e) + } +} + +func (sc *subChannel) deleteChild(id int64) { + delete(sc.sockets, id) + sc.deleteSelfIfReady() +} + +func (sc *subChannel) triggerDelete() { + sc.closeCalled = true + sc.deleteSelfIfReady() +} + +func (sc *subChannel) getParentID() int64 { + return sc.pid +} + +// deleteSelfFromTree tries to delete the subchannel from the channelz entry relation tree, which +// means deleting the subchannel reference from its parent's child list. +// +// In order for a subchannel to be deleted from the tree, it must meet the criteria that, removal of +// the corresponding grpc object has been invoked, and the subchannel does not have any children left. +// +// The returned boolean value indicates whether the channel has been successfully deleted from tree. +func (sc *subChannel) deleteSelfFromTree() (deleted bool) { + if !sc.closeCalled || len(sc.sockets) != 0 { + return false + } + sc.cm.findEntry(sc.pid).deleteChild(sc.id) + return true +} + +// deleteSelfFromMap checks whether it is valid to delete the subchannel from the map, which means +// deleting the subchannel from channelz's tracking entirely. Users can no longer use id to query +// the subchannel, and its memory will be garbage collected. +// +// The trace reference count of the subchannel must be 0 in order to be deleted from the map. This is +// specified in the channel tracing gRFC that as long as some other trace has reference to an entity, +// the trace of the referenced entity must not be deleted. In order to release the resource allocated +// by grpc, the reference to the grpc object is reset to a dummy object. +// +// deleteSelfFromMap must be called after deleteSelfFromTree returns true. +// +// It returns a bool to indicate whether the channel can be safely deleted from map. +func (sc *subChannel) deleteSelfFromMap() (delete bool) { + if sc.getTraceRefCount() != 0 { + // free the grpc struct (i.e. addrConn) + sc.c = &dummyChannel{} + return false + } + return true +} + +// deleteSelfIfReady tries to delete the subchannel itself from the channelz database. +// The delete process includes two steps: +// 1. delete the subchannel from the entry relation tree, i.e. delete the subchannel reference from +// its parent's child list. +// 2. delete the subchannel from the map, i.e. delete the subchannel entirely from channelz. Lookup +// by id will return entry not found error. +func (sc *subChannel) deleteSelfIfReady() { + if !sc.deleteSelfFromTree() { + return + } + if !sc.deleteSelfFromMap() { + return + } + sc.cm.deleteEntry(sc.id) + sc.trace.clear() +} + +func (sc *subChannel) getChannelTrace() *channelTrace { + return sc.trace +} + +func (sc *subChannel) incrTraceRefCount() { + atomic.AddInt32(&sc.traceRefCount, 1) +} + +func (sc *subChannel) decrTraceRefCount() { + atomic.AddInt32(&sc.traceRefCount, -1) +} + +func (sc *subChannel) getTraceRefCount() int { + i := atomic.LoadInt32(&sc.traceRefCount) + return int(i) +} + +func (sc *subChannel) getRefName() string { + return sc.refName +} + +// SocketMetric defines the info channelz provides for a specific Socket, which +// includes SocketInternalMetric and channelz-specific data, such as channelz id, etc. +type SocketMetric struct { + // ID is the channelz id of this socket. + ID int64 + // RefName is the human readable reference string of this socket. + RefName string + // SocketData contains socket internal metric reported by the socket through + // ChannelzMetric(). + SocketData *SocketInternalMetric +} + +// SocketInternalMetric defines the struct that the implementor of Socket interface +// should return from ChannelzMetric(). +type SocketInternalMetric struct { + // The number of streams that have been started. + StreamsStarted int64 + // The number of streams that have ended successfully: + // On client side, receiving frame with eos bit set. + // On server side, sending frame with eos bit set. + StreamsSucceeded int64 + // The number of streams that have ended unsuccessfully: + // On client side, termination without receiving frame with eos bit set. + // On server side, termination without sending frame with eos bit set. + StreamsFailed int64 + // The number of messages successfully sent on this socket. + MessagesSent int64 + MessagesReceived int64 + // The number of keep alives sent. This is typically implemented with HTTP/2 + // ping messages. + KeepAlivesSent int64 + // The last time a stream was created by this endpoint. Usually unset for + // servers. + LastLocalStreamCreatedTimestamp time.Time + // The last time a stream was created by the remote endpoint. Usually unset + // for clients. + LastRemoteStreamCreatedTimestamp time.Time + // The last time a message was sent by this endpoint. + LastMessageSentTimestamp time.Time + // The last time a message was received by this endpoint. + LastMessageReceivedTimestamp time.Time + // The amount of window, granted to the local endpoint by the remote endpoint. + // This may be slightly out of date due to network latency. This does NOT + // include stream level or TCP level flow control info. + LocalFlowControlWindow int64 + // The amount of window, granted to the remote endpoint by the local endpoint. + // This may be slightly out of date due to network latency. This does NOT + // include stream level or TCP level flow control info. + RemoteFlowControlWindow int64 + // The locally bound address. + LocalAddr net.Addr + // The remote bound address. May be absent. + RemoteAddr net.Addr + // Optional, represents the name of the remote endpoint, if different than + // the original target name. + RemoteName string + SocketOptions *SocketOptionData + Security credentials.ChannelzSecurityValue +} + +// Socket is the interface that should be satisfied in order to be tracked by +// channelz as Socket. +type Socket interface { + ChannelzMetric() *SocketInternalMetric +} + +type listenSocket struct { + refName string + s Socket + id int64 + pid int64 + cm *channelMap +} + +func (ls *listenSocket) addChild(id int64, e entry) { + logger.Errorf("cannot add a child (id = %d) of type %T to a listen socket", id, e) +} + +func (ls *listenSocket) deleteChild(id int64) { + logger.Errorf("cannot delete a child (id = %d) from a listen socket", id) +} + +func (ls *listenSocket) triggerDelete() { + ls.cm.deleteEntry(ls.id) + ls.cm.findEntry(ls.pid).deleteChild(ls.id) +} + +func (ls *listenSocket) deleteSelfIfReady() { + logger.Errorf("cannot call deleteSelfIfReady on a listen socket") +} + +func (ls *listenSocket) getParentID() int64 { + return ls.pid +} + +type normalSocket struct { + refName string + s Socket + id int64 + pid int64 + cm *channelMap +} + +func (ns *normalSocket) addChild(id int64, e entry) { + logger.Errorf("cannot add a child (id = %d) of type %T to a normal socket", id, e) +} + +func (ns *normalSocket) deleteChild(id int64) { + logger.Errorf("cannot delete a child (id = %d) from a normal socket", id) +} + +func (ns *normalSocket) triggerDelete() { + ns.cm.deleteEntry(ns.id) + ns.cm.findEntry(ns.pid).deleteChild(ns.id) +} + +func (ns *normalSocket) deleteSelfIfReady() { + logger.Errorf("cannot call deleteSelfIfReady on a normal socket") +} + +func (ns *normalSocket) getParentID() int64 { + return ns.pid +} + +// ServerMetric defines the info channelz provides for a specific Server, which +// includes ServerInternalMetric and channelz-specific data, such as channelz id, +// child list, etc. +type ServerMetric struct { + // ID is the channelz id of this server. + ID int64 + // RefName is the human readable reference string of this server. + RefName string + // ServerData contains server internal metric reported by the server through + // ChannelzMetric(). + ServerData *ServerInternalMetric + // ListenSockets tracks the listener socket type children of this server in the + // format of a map from socket channelz id to corresponding reference string. + ListenSockets map[int64]string +} + +// ServerInternalMetric defines the struct that the implementor of Server interface +// should return from ChannelzMetric(). +type ServerInternalMetric struct { + // The number of incoming calls started on the server. + CallsStarted int64 + // The number of incoming calls that have completed with an OK status. + CallsSucceeded int64 + // The number of incoming calls that have a completed with a non-OK status. + CallsFailed int64 + // The last time a call was started on the server. + LastCallStartedTimestamp time.Time +} + +// Server is the interface to be satisfied in order to be tracked by channelz as +// Server. +type Server interface { + ChannelzMetric() *ServerInternalMetric +} + +type server struct { + refName string + s Server + closeCalled bool + sockets map[int64]string + listenSockets map[int64]string + id int64 + cm *channelMap +} + +func (s *server) addChild(id int64, e entry) { + switch v := e.(type) { + case *normalSocket: + s.sockets[id] = v.refName + case *listenSocket: + s.listenSockets[id] = v.refName + default: + logger.Errorf("cannot add a child (id = %d) of type %T to a server", id, e) + } +} + +func (s *server) deleteChild(id int64) { + delete(s.sockets, id) + delete(s.listenSockets, id) + s.deleteSelfIfReady() +} + +func (s *server) triggerDelete() { + s.closeCalled = true + s.deleteSelfIfReady() +} + +func (s *server) deleteSelfIfReady() { + if !s.closeCalled || len(s.sockets)+len(s.listenSockets) != 0 { + return + } + s.cm.deleteEntry(s.id) +} + +func (s *server) getParentID() int64 { + return 0 +} + +type tracedChannel interface { + getChannelTrace() *channelTrace + incrTraceRefCount() + decrTraceRefCount() + getRefName() string +} + +type channelTrace struct { + cm *channelMap + createdTime time.Time + eventCount int64 + mu sync.Mutex + events []*TraceEvent +} + +func (c *channelTrace) append(e *TraceEvent) { + c.mu.Lock() + if len(c.events) == getMaxTraceEntry() { + del := c.events[0] + c.events = c.events[1:] + if del.RefID != 0 { + // start recursive cleanup in a goroutine to not block the call originated from grpc. + go func() { + // need to acquire c.cm.mu lock to call the unlocked attemptCleanup func. + c.cm.mu.Lock() + c.cm.decrTraceRefCount(del.RefID) + c.cm.mu.Unlock() + }() + } + } + e.Timestamp = time.Now() + c.events = append(c.events, e) + c.eventCount++ + c.mu.Unlock() +} + +func (c *channelTrace) clear() { + c.mu.Lock() + for _, e := range c.events { + if e.RefID != 0 { + // caller should have already held the c.cm.mu lock. + c.cm.decrTraceRefCount(e.RefID) + } + } + c.mu.Unlock() +} + +// Severity is the severity level of a trace event. +// The canonical enumeration of all valid values is here: +// https://github.com/grpc/grpc-proto/blob/9b13d199cc0d4703c7ea26c9c330ba695866eb23/grpc/channelz/v1/channelz.proto#L126. +type Severity int + +const ( + // CtUnknown indicates unknown severity of a trace event. + CtUnknown Severity = iota + // CtInfo indicates info level severity of a trace event. + CtInfo + // CtWarning indicates warning level severity of a trace event. + CtWarning + // CtError indicates error level severity of a trace event. + CtError +) + +// RefChannelType is the type of the entity being referenced in a trace event. +type RefChannelType int + +const ( + // RefChannel indicates the referenced entity is a Channel. + RefChannel RefChannelType = iota + // RefSubChannel indicates the referenced entity is a SubChannel. + RefSubChannel +) + +func (c *channelTrace) dumpData() *ChannelTrace { + c.mu.Lock() + ct := &ChannelTrace{EventNum: c.eventCount, CreationTime: c.createdTime} + ct.Events = c.events[:len(c.events)] + c.mu.Unlock() + return ct +} diff --git a/vendor/google.golang.org/grpc/internal/channelz/types_linux.go b/vendor/google.golang.org/grpc/internal/channelz/types_linux.go new file mode 100644 index 000000000..692dd6181 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/channelz/types_linux.go @@ -0,0 +1,53 @@ +// +build !appengine + +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package channelz + +import ( + "syscall" + + "golang.org/x/sys/unix" +) + +// SocketOptionData defines the struct to hold socket option data, and related +// getter function to obtain info from fd. +type SocketOptionData struct { + Linger *unix.Linger + RecvTimeout *unix.Timeval + SendTimeout *unix.Timeval + TCPInfo *unix.TCPInfo +} + +// Getsockopt defines the function to get socket options requested by channelz. +// It is to be passed to syscall.RawConn.Control(). +func (s *SocketOptionData) Getsockopt(fd uintptr) { + if v, err := unix.GetsockoptLinger(int(fd), syscall.SOL_SOCKET, syscall.SO_LINGER); err == nil { + s.Linger = v + } + if v, err := unix.GetsockoptTimeval(int(fd), syscall.SOL_SOCKET, syscall.SO_RCVTIMEO); err == nil { + s.RecvTimeout = v + } + if v, err := unix.GetsockoptTimeval(int(fd), syscall.SOL_SOCKET, syscall.SO_SNDTIMEO); err == nil { + s.SendTimeout = v + } + if v, err := unix.GetsockoptTCPInfo(int(fd), syscall.SOL_TCP, syscall.TCP_INFO); err == nil { + s.TCPInfo = v + } +} diff --git a/vendor/google.golang.org/grpc/internal/channelz/types_nonlinux.go b/vendor/google.golang.org/grpc/internal/channelz/types_nonlinux.go new file mode 100644 index 000000000..19c2fc521 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/channelz/types_nonlinux.go @@ -0,0 +1,42 @@ +// +build !linux appengine + +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package channelz + +import ( + "sync" +) + +var once sync.Once + +// SocketOptionData defines the struct to hold socket option data, and related +// getter function to obtain info from fd. +// Windows OS doesn't support Socket Option +type SocketOptionData struct { +} + +// Getsockopt defines the function to get socket options requested by channelz. +// It is to be passed to syscall.RawConn.Control(). +// Windows OS doesn't support Socket Option +func (s *SocketOptionData) Getsockopt(fd uintptr) { + once.Do(func() { + logger.Warning("Channelz: socket options are not supported on non-linux os and appengine.") + }) +} diff --git a/vendor/google.golang.org/grpc/internal/channelz/util_linux.go b/vendor/google.golang.org/grpc/internal/channelz/util_linux.go new file mode 100644 index 000000000..fdf409d55 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/channelz/util_linux.go @@ -0,0 +1,39 @@ +// +build linux,!appengine + +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package channelz + +import ( + "syscall" +) + +// GetSocketOption gets the socket option info of the conn. +func GetSocketOption(socket interface{}) *SocketOptionData { + c, ok := socket.(syscall.Conn) + if !ok { + return nil + } + data := &SocketOptionData{} + if rawConn, err := c.SyscallConn(); err == nil { + rawConn.Control(data.Getsockopt) + return data + } + return nil +} diff --git a/vendor/google.golang.org/grpc/internal/channelz/util_nonlinux.go b/vendor/google.golang.org/grpc/internal/channelz/util_nonlinux.go new file mode 100644 index 000000000..8864a0811 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/channelz/util_nonlinux.go @@ -0,0 +1,26 @@ +// +build !linux appengine + +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package channelz + +// GetSocketOption gets the socket option info of the conn. +func GetSocketOption(c interface{}) *SocketOptionData { + return nil +} diff --git a/vendor/google.golang.org/grpc/internal/credentials/spiffe.go b/vendor/google.golang.org/grpc/internal/credentials/spiffe.go new file mode 100644 index 000000000..be70b6cdf --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/credentials/spiffe.go @@ -0,0 +1,77 @@ +// +build !appengine + +/* + * + * Copyright 2020 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package credentials defines APIs for parsing SPIFFE ID. +// +// All APIs in this package are experimental. +package credentials + +import ( + "crypto/tls" + "crypto/x509" + "net/url" + + "google.golang.org/grpc/grpclog" +) + +var logger = grpclog.Component("credentials") + +// SPIFFEIDFromState parses the SPIFFE ID from State. If the SPIFFE ID format +// is invalid, return nil with warning. +func SPIFFEIDFromState(state tls.ConnectionState) *url.URL { + if len(state.PeerCertificates) == 0 || len(state.PeerCertificates[0].URIs) == 0 { + return nil + } + return SPIFFEIDFromCert(state.PeerCertificates[0]) +} + +// SPIFFEIDFromCert parses the SPIFFE ID from x509.Certificate. If the SPIFFE +// ID format is invalid, return nil with warning. +func SPIFFEIDFromCert(cert *x509.Certificate) *url.URL { + if cert == nil || cert.URIs == nil { + return nil + } + var spiffeID *url.URL + for _, uri := range cert.URIs { + if uri == nil || uri.Scheme != "spiffe" || uri.Opaque != "" || (uri.User != nil && uri.User.Username() != "") { + continue + } + // From this point, we assume the uri is intended for a SPIFFE ID. + if len(uri.String()) > 2048 { + logger.Warning("invalid SPIFFE ID: total ID length larger than 2048 bytes") + return nil + } + if len(uri.Host) == 0 || len(uri.Path) == 0 { + logger.Warning("invalid SPIFFE ID: domain or workload ID is empty") + return nil + } + if len(uri.Host) > 255 { + logger.Warning("invalid SPIFFE ID: domain length larger than 255 characters") + return nil + } + // A valid SPIFFE certificate can only have exactly one URI SAN field. + if len(cert.URIs) > 1 { + logger.Warning("invalid SPIFFE ID: multiple URI SANs") + return nil + } + spiffeID = uri + } + return spiffeID +} diff --git a/vendor/google.golang.org/grpc/internal/credentials/spiffe_appengine.go b/vendor/google.golang.org/grpc/internal/credentials/spiffe_appengine.go new file mode 100644 index 000000000..af6f57719 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/credentials/spiffe_appengine.go @@ -0,0 +1,31 @@ +// +build appengine + +/* + * + * Copyright 2020 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package credentials + +import ( + "crypto/tls" + "net/url" +) + +// SPIFFEIDFromState is a no-op for appengine builds. +func SPIFFEIDFromState(state tls.ConnectionState) *url.URL { + return nil +} diff --git a/vendor/google.golang.org/grpc/internal/credentials/syscallconn.go b/vendor/google.golang.org/grpc/internal/credentials/syscallconn.go new file mode 100644 index 000000000..f499a614c --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/credentials/syscallconn.go @@ -0,0 +1,60 @@ +// +build !appengine + +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package credentials + +import ( + "net" + "syscall" +) + +type sysConn = syscall.Conn + +// syscallConn keeps reference of rawConn to support syscall.Conn for channelz. +// SyscallConn() (the method in interface syscall.Conn) is explicitly +// implemented on this type, +// +// Interface syscall.Conn is implemented by most net.Conn implementations (e.g. +// TCPConn, UnixConn), but is not part of net.Conn interface. So wrapper conns +// that embed net.Conn don't implement syscall.Conn. (Side note: tls.Conn +// doesn't embed net.Conn, so even if syscall.Conn is part of net.Conn, it won't +// help here). +type syscallConn struct { + net.Conn + // sysConn is a type alias of syscall.Conn. It's necessary because the name + // `Conn` collides with `net.Conn`. + sysConn +} + +// WrapSyscallConn tries to wrap rawConn and newConn into a net.Conn that +// implements syscall.Conn. rawConn will be used to support syscall, and newConn +// will be used for read/write. +// +// This function returns newConn if rawConn doesn't implement syscall.Conn. +func WrapSyscallConn(rawConn, newConn net.Conn) net.Conn { + sysConn, ok := rawConn.(syscall.Conn) + if !ok { + return newConn + } + return &syscallConn{ + Conn: newConn, + sysConn: sysConn, + } +} diff --git a/vendor/google.golang.org/grpc/internal/credentials/syscallconn_appengine.go b/vendor/google.golang.org/grpc/internal/credentials/syscallconn_appengine.go new file mode 100644 index 000000000..a6144cd66 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/credentials/syscallconn_appengine.go @@ -0,0 +1,30 @@ +// +build appengine + +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package credentials + +import ( + "net" +) + +// WrapSyscallConn returns newConn on appengine. +func WrapSyscallConn(rawConn, newConn net.Conn) net.Conn { + return newConn +} diff --git a/vendor/google.golang.org/grpc/internal/credentials/util.go b/vendor/google.golang.org/grpc/internal/credentials/util.go new file mode 100644 index 000000000..55664fa46 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/credentials/util.go @@ -0,0 +1,50 @@ +/* + * + * Copyright 2020 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package credentials + +import "crypto/tls" + +const alpnProtoStrH2 = "h2" + +// AppendH2ToNextProtos appends h2 to next protos. +func AppendH2ToNextProtos(ps []string) []string { + for _, p := range ps { + if p == alpnProtoStrH2 { + return ps + } + } + ret := make([]string, 0, len(ps)+1) + ret = append(ret, ps...) + return append(ret, alpnProtoStrH2) +} + +// CloneTLSConfig returns a shallow clone of the exported +// fields of cfg, ignoring the unexported sync.Once, which +// contains a mutex and must not be copied. +// +// If cfg is nil, a new zero tls.Config is returned. +// +// TODO: inline this function if possible. +func CloneTLSConfig(cfg *tls.Config) *tls.Config { + if cfg == nil { + return &tls.Config{} + } + + return cfg.Clone() +} diff --git a/vendor/google.golang.org/grpc/internal/envconfig/envconfig.go b/vendor/google.golang.org/grpc/internal/envconfig/envconfig.go new file mode 100644 index 000000000..73931a94b --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/envconfig/envconfig.go @@ -0,0 +1,38 @@ +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package envconfig contains grpc settings configured by environment variables. +package envconfig + +import ( + "os" + "strings" +) + +const ( + prefix = "GRPC_GO_" + retryStr = prefix + "RETRY" + txtErrIgnoreStr = prefix + "IGNORE_TXT_ERRORS" +) + +var ( + // Retry is set if retry is explicitly enabled via "GRPC_GO_RETRY=on". + Retry = strings.EqualFold(os.Getenv(retryStr), "on") + // TXTErrIgnore is set if TXT errors should be ignored ("GRPC_GO_IGNORE_TXT_ERRORS" is not "false"). + TXTErrIgnore = !strings.EqualFold(os.Getenv(txtErrIgnoreStr), "false") +) diff --git a/vendor/google.golang.org/grpc/internal/grpclog/grpclog.go b/vendor/google.golang.org/grpc/internal/grpclog/grpclog.go new file mode 100644 index 000000000..e6f975cbf --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/grpclog/grpclog.go @@ -0,0 +1,126 @@ +/* + * + * Copyright 2020 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package grpclog (internal) defines depth logging for grpc. +package grpclog + +import ( + "os" +) + +// Logger is the logger used for the non-depth log functions. +var Logger LoggerV2 + +// DepthLogger is the logger used for the depth log functions. +var DepthLogger DepthLoggerV2 + +// InfoDepth logs to the INFO log at the specified depth. +func InfoDepth(depth int, args ...interface{}) { + if DepthLogger != nil { + DepthLogger.InfoDepth(depth, args...) + } else { + Logger.Infoln(args...) + } +} + +// WarningDepth logs to the WARNING log at the specified depth. +func WarningDepth(depth int, args ...interface{}) { + if DepthLogger != nil { + DepthLogger.WarningDepth(depth, args...) + } else { + Logger.Warningln(args...) + } +} + +// ErrorDepth logs to the ERROR log at the specified depth. +func ErrorDepth(depth int, args ...interface{}) { + if DepthLogger != nil { + DepthLogger.ErrorDepth(depth, args...) + } else { + Logger.Errorln(args...) + } +} + +// FatalDepth logs to the FATAL log at the specified depth. +func FatalDepth(depth int, args ...interface{}) { + if DepthLogger != nil { + DepthLogger.FatalDepth(depth, args...) + } else { + Logger.Fatalln(args...) + } + os.Exit(1) +} + +// LoggerV2 does underlying logging work for grpclog. +// This is a copy of the LoggerV2 defined in the external grpclog package. It +// is defined here to avoid a circular dependency. +type LoggerV2 interface { + // Info logs to INFO log. Arguments are handled in the manner of fmt.Print. + Info(args ...interface{}) + // Infoln logs to INFO log. Arguments are handled in the manner of fmt.Println. + Infoln(args ...interface{}) + // Infof logs to INFO log. Arguments are handled in the manner of fmt.Printf. + Infof(format string, args ...interface{}) + // Warning logs to WARNING log. Arguments are handled in the manner of fmt.Print. + Warning(args ...interface{}) + // Warningln logs to WARNING log. Arguments are handled in the manner of fmt.Println. + Warningln(args ...interface{}) + // Warningf logs to WARNING log. Arguments are handled in the manner of fmt.Printf. + Warningf(format string, args ...interface{}) + // Error logs to ERROR log. Arguments are handled in the manner of fmt.Print. + Error(args ...interface{}) + // Errorln logs to ERROR log. Arguments are handled in the manner of fmt.Println. + Errorln(args ...interface{}) + // Errorf logs to ERROR log. Arguments are handled in the manner of fmt.Printf. + Errorf(format string, args ...interface{}) + // Fatal logs to ERROR log. Arguments are handled in the manner of fmt.Print. + // gRPC ensures that all Fatal logs will exit with os.Exit(1). + // Implementations may also call os.Exit() with a non-zero exit code. + Fatal(args ...interface{}) + // Fatalln logs to ERROR log. Arguments are handled in the manner of fmt.Println. + // gRPC ensures that all Fatal logs will exit with os.Exit(1). + // Implementations may also call os.Exit() with a non-zero exit code. + Fatalln(args ...interface{}) + // Fatalf logs to ERROR log. Arguments are handled in the manner of fmt.Printf. + // gRPC ensures that all Fatal logs will exit with os.Exit(1). + // Implementations may also call os.Exit() with a non-zero exit code. + Fatalf(format string, args ...interface{}) + // V reports whether verbosity level l is at least the requested verbose level. + V(l int) bool +} + +// DepthLoggerV2 logs at a specified call frame. If a LoggerV2 also implements +// DepthLoggerV2, the below functions will be called with the appropriate stack +// depth set for trivial functions the logger may ignore. +// This is a copy of the DepthLoggerV2 defined in the external grpclog package. +// It is defined here to avoid a circular dependency. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type DepthLoggerV2 interface { + // InfoDepth logs to INFO log at the specified depth. Arguments are handled in the manner of fmt.Print. + InfoDepth(depth int, args ...interface{}) + // WarningDepth logs to WARNING log at the specified depth. Arguments are handled in the manner of fmt.Print. + WarningDepth(depth int, args ...interface{}) + // ErrorDetph logs to ERROR log at the specified depth. Arguments are handled in the manner of fmt.Print. + ErrorDepth(depth int, args ...interface{}) + // FatalDepth logs to FATAL log at the specified depth. Arguments are handled in the manner of fmt.Print. + FatalDepth(depth int, args ...interface{}) +} diff --git a/vendor/google.golang.org/grpc/internal/grpclog/prefixLogger.go b/vendor/google.golang.org/grpc/internal/grpclog/prefixLogger.go new file mode 100644 index 000000000..82af70e96 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/grpclog/prefixLogger.go @@ -0,0 +1,81 @@ +/* + * + * Copyright 2020 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpclog + +import ( + "fmt" +) + +// PrefixLogger does logging with a prefix. +// +// Logging method on a nil logs without any prefix. +type PrefixLogger struct { + logger DepthLoggerV2 + prefix string +} + +// Infof does info logging. +func (pl *PrefixLogger) Infof(format string, args ...interface{}) { + if pl != nil { + // Handle nil, so the tests can pass in a nil logger. + format = pl.prefix + format + pl.logger.InfoDepth(1, fmt.Sprintf(format, args...)) + return + } + InfoDepth(1, fmt.Sprintf(format, args...)) +} + +// Warningf does warning logging. +func (pl *PrefixLogger) Warningf(format string, args ...interface{}) { + if pl != nil { + format = pl.prefix + format + pl.logger.WarningDepth(1, fmt.Sprintf(format, args...)) + return + } + WarningDepth(1, fmt.Sprintf(format, args...)) +} + +// Errorf does error logging. +func (pl *PrefixLogger) Errorf(format string, args ...interface{}) { + if pl != nil { + format = pl.prefix + format + pl.logger.ErrorDepth(1, fmt.Sprintf(format, args...)) + return + } + ErrorDepth(1, fmt.Sprintf(format, args...)) +} + +// Debugf does info logging at verbose level 2. +func (pl *PrefixLogger) Debugf(format string, args ...interface{}) { + if !Logger.V(2) { + return + } + if pl != nil { + // Handle nil, so the tests can pass in a nil logger. + format = pl.prefix + format + pl.logger.InfoDepth(1, fmt.Sprintf(format, args...)) + return + } + InfoDepth(1, fmt.Sprintf(format, args...)) +} + +// NewPrefixLogger creates a prefix logger with the given prefix. +func NewPrefixLogger(logger DepthLoggerV2, prefix string) *PrefixLogger { + return &PrefixLogger{logger: logger, prefix: prefix} +} diff --git a/vendor/google.golang.org/grpc/internal/grpcrand/grpcrand.go b/vendor/google.golang.org/grpc/internal/grpcrand/grpcrand.go new file mode 100644 index 000000000..200b115ca --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/grpcrand/grpcrand.go @@ -0,0 +1,56 @@ +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package grpcrand implements math/rand functions in a concurrent-safe way +// with a global random source, independent of math/rand's global source. +package grpcrand + +import ( + "math/rand" + "sync" + "time" +) + +var ( + r = rand.New(rand.NewSource(time.Now().UnixNano())) + mu sync.Mutex +) + +// Int63n implements rand.Int63n on the grpcrand global source. +func Int63n(n int64) int64 { + mu.Lock() + res := r.Int63n(n) + mu.Unlock() + return res +} + +// Intn implements rand.Intn on the grpcrand global source. +func Intn(n int) int { + mu.Lock() + res := r.Intn(n) + mu.Unlock() + return res +} + +// Float64 implements rand.Float64 on the grpcrand global source. +func Float64() float64 { + mu.Lock() + res := r.Float64() + mu.Unlock() + return res +} diff --git a/vendor/google.golang.org/grpc/internal/grpcsync/event.go b/vendor/google.golang.org/grpc/internal/grpcsync/event.go new file mode 100644 index 000000000..fbe697c37 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/grpcsync/event.go @@ -0,0 +1,61 @@ +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package grpcsync implements additional synchronization primitives built upon +// the sync package. +package grpcsync + +import ( + "sync" + "sync/atomic" +) + +// Event represents a one-time event that may occur in the future. +type Event struct { + fired int32 + c chan struct{} + o sync.Once +} + +// Fire causes e to complete. It is safe to call multiple times, and +// concurrently. It returns true iff this call to Fire caused the signaling +// channel returned by Done to close. +func (e *Event) Fire() bool { + ret := false + e.o.Do(func() { + atomic.StoreInt32(&e.fired, 1) + close(e.c) + ret = true + }) + return ret +} + +// Done returns a channel that will be closed when Fire is called. +func (e *Event) Done() <-chan struct{} { + return e.c +} + +// HasFired returns true if Fire has been called. +func (e *Event) HasFired() bool { + return atomic.LoadInt32(&e.fired) == 1 +} + +// NewEvent returns a new, ready-to-use Event. +func NewEvent() *Event { + return &Event{c: make(chan struct{})} +} diff --git a/vendor/google.golang.org/grpc/internal/grpcutil/encode_duration.go b/vendor/google.golang.org/grpc/internal/grpcutil/encode_duration.go new file mode 100644 index 000000000..b25b0baec --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/grpcutil/encode_duration.go @@ -0,0 +1,63 @@ +/* + * + * Copyright 2020 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpcutil + +import ( + "strconv" + "time" +) + +const maxTimeoutValue int64 = 100000000 - 1 + +// div does integer division and round-up the result. Note that this is +// equivalent to (d+r-1)/r but has less chance to overflow. +func div(d, r time.Duration) int64 { + if d%r > 0 { + return int64(d/r + 1) + } + return int64(d / r) +} + +// EncodeDuration encodes the duration to the format grpc-timeout header +// accepts. +// +// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests +func EncodeDuration(t time.Duration) string { + // TODO: This is simplistic and not bandwidth efficient. Improve it. + if t <= 0 { + return "0n" + } + if d := div(t, time.Nanosecond); d <= maxTimeoutValue { + return strconv.FormatInt(d, 10) + "n" + } + if d := div(t, time.Microsecond); d <= maxTimeoutValue { + return strconv.FormatInt(d, 10) + "u" + } + if d := div(t, time.Millisecond); d <= maxTimeoutValue { + return strconv.FormatInt(d, 10) + "m" + } + if d := div(t, time.Second); d <= maxTimeoutValue { + return strconv.FormatInt(d, 10) + "S" + } + if d := div(t, time.Minute); d <= maxTimeoutValue { + return strconv.FormatInt(d, 10) + "M" + } + // Note that maxTimeoutValue * time.Hour > MaxInt64. + return strconv.FormatInt(div(t, time.Hour), 10) + "H" +} diff --git a/vendor/google.golang.org/grpc/internal/grpcutil/metadata.go b/vendor/google.golang.org/grpc/internal/grpcutil/metadata.go new file mode 100644 index 000000000..6f22bd891 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/grpcutil/metadata.go @@ -0,0 +1,40 @@ +/* + * + * Copyright 2020 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpcutil + +import ( + "context" + + "google.golang.org/grpc/metadata" +) + +type mdExtraKey struct{} + +// WithExtraMetadata creates a new context with incoming md attached. +func WithExtraMetadata(ctx context.Context, md metadata.MD) context.Context { + return context.WithValue(ctx, mdExtraKey{}, md) +} + +// ExtraMetadata returns the incoming metadata in ctx if it exists. The +// returned MD should not be modified. Writing to it may cause races. +// Modification should be made to copies of the returned MD. +func ExtraMetadata(ctx context.Context) (md metadata.MD, ok bool) { + md, ok = ctx.Value(mdExtraKey{}).(metadata.MD) + return +} diff --git a/vendor/google.golang.org/grpc/internal/grpcutil/method.go b/vendor/google.golang.org/grpc/internal/grpcutil/method.go new file mode 100644 index 000000000..4e7475060 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/grpcutil/method.go @@ -0,0 +1,84 @@ +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpcutil + +import ( + "errors" + "strings" +) + +// ParseMethod splits service and method from the input. It expects format +// "/service/method". +// +func ParseMethod(methodName string) (service, method string, _ error) { + if !strings.HasPrefix(methodName, "/") { + return "", "", errors.New("invalid method name: should start with /") + } + methodName = methodName[1:] + + pos := strings.LastIndex(methodName, "/") + if pos < 0 { + return "", "", errors.New("invalid method name: suffix /method is missing") + } + return methodName[:pos], methodName[pos+1:], nil +} + +const baseContentType = "application/grpc" + +// ContentSubtype returns the content-subtype for the given content-type. The +// given content-type must be a valid content-type that starts with +// "application/grpc". A content-subtype will follow "application/grpc" after a +// "+" or ";". See +// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests for +// more details. +// +// If contentType is not a valid content-type for gRPC, the boolean +// will be false, otherwise true. If content-type == "application/grpc", +// "application/grpc+", or "application/grpc;", the boolean will be true, +// but no content-subtype will be returned. +// +// contentType is assumed to be lowercase already. +func ContentSubtype(contentType string) (string, bool) { + if contentType == baseContentType { + return "", true + } + if !strings.HasPrefix(contentType, baseContentType) { + return "", false + } + // guaranteed since != baseContentType and has baseContentType prefix + switch contentType[len(baseContentType)] { + case '+', ';': + // this will return true for "application/grpc+" or "application/grpc;" + // which the previous validContentType function tested to be valid, so we + // just say that no content-subtype is specified in this case + return contentType[len(baseContentType)+1:], true + default: + return "", false + } +} + +// ContentType builds full content type with the given sub-type. +// +// contentSubtype is assumed to be lowercase +func ContentType(contentSubtype string) string { + if contentSubtype == "" { + return baseContentType + } + return baseContentType + "+" + contentSubtype +} diff --git a/vendor/google.golang.org/grpc/internal/grpcutil/target.go b/vendor/google.golang.org/grpc/internal/grpcutil/target.go new file mode 100644 index 000000000..80b33cdaf --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/grpcutil/target.go @@ -0,0 +1,55 @@ +/* + * + * Copyright 2020 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package grpcutil provides a bunch of utility functions to be used across the +// gRPC codebase. +package grpcutil + +import ( + "strings" + + "google.golang.org/grpc/resolver" +) + +// split2 returns the values from strings.SplitN(s, sep, 2). +// If sep is not found, it returns ("", "", false) instead. +func split2(s, sep string) (string, string, bool) { + spl := strings.SplitN(s, sep, 2) + if len(spl) < 2 { + return "", "", false + } + return spl[0], spl[1], true +} + +// ParseTarget splits target into a resolver.Target struct containing scheme, +// authority and endpoint. +// +// If target is not a valid scheme://authority/endpoint, it returns {Endpoint: +// target}. +func ParseTarget(target string) (ret resolver.Target) { + var ok bool + ret.Scheme, ret.Endpoint, ok = split2(target, "://") + if !ok { + return resolver.Target{Endpoint: target} + } + ret.Authority, ret.Endpoint, ok = split2(ret.Endpoint, "/") + if !ok { + return resolver.Target{Endpoint: target} + } + return ret +} diff --git a/vendor/google.golang.org/grpc/internal/internal.go b/vendor/google.golang.org/grpc/internal/internal.go new file mode 100644 index 000000000..716d92800 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/internal.go @@ -0,0 +1,81 @@ +/* + * Copyright 2016 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package internal contains gRPC-internal code, to avoid polluting +// the godoc of the top-level grpc package. It must not import any grpc +// symbols to avoid circular dependencies. +package internal + +import ( + "context" + "time" + + "google.golang.org/grpc/connectivity" + "google.golang.org/grpc/serviceconfig" +) + +var ( + // WithHealthCheckFunc is set by dialoptions.go + WithHealthCheckFunc interface{} // func (HealthChecker) DialOption + // HealthCheckFunc is used to provide client-side LB channel health checking + HealthCheckFunc HealthChecker + // BalancerUnregister is exported by package balancer to unregister a balancer. + BalancerUnregister func(name string) + // KeepaliveMinPingTime is the minimum ping interval. This must be 10s by + // default, but tests may wish to set it lower for convenience. + KeepaliveMinPingTime = 10 * time.Second + // NewRequestInfoContext creates a new context based on the argument context attaching + // the passed in RequestInfo to the new context. + NewRequestInfoContext interface{} // func(context.Context, credentials.RequestInfo) context.Context + // NewClientHandshakeInfoContext returns a copy of the input context with + // the passed in ClientHandshakeInfo struct added to it. + NewClientHandshakeInfoContext interface{} // func(context.Context, credentials.ClientHandshakeInfo) context.Context + // ParseServiceConfigForTesting is for creating a fake + // ClientConn for resolver testing only + ParseServiceConfigForTesting interface{} // func(string) *serviceconfig.ParseResult + // EqualServiceConfigForTesting is for testing service config generation and + // parsing. Both a and b should be returned by ParseServiceConfigForTesting. + // This function compares the config without rawJSON stripped, in case the + // there's difference in white space. + EqualServiceConfigForTesting func(a, b serviceconfig.Config) bool + // GetCertificateProviderBuilder returns the registered builder for the + // given name. This is set by package certprovider for use from xDS + // bootstrap code while parsing certificate provider configs in the + // bootstrap file. + GetCertificateProviderBuilder interface{} // func(string) certprovider.Builder +) + +// HealthChecker defines the signature of the client-side LB channel health checking function. +// +// The implementation is expected to create a health checking RPC stream by +// calling newStream(), watch for the health status of serviceName, and report +// it's health back by calling setConnectivityState(). +// +// The health checking protocol is defined at: +// https://github.com/grpc/grpc/blob/master/doc/health-checking.md +type HealthChecker func(ctx context.Context, newStream func(string) (interface{}, error), setConnectivityState func(connectivity.State, error), serviceName string) error + +const ( + // CredsBundleModeFallback switches GoogleDefaultCreds to fallback mode. + CredsBundleModeFallback = "fallback" + // CredsBundleModeBalancer switches GoogleDefaultCreds to grpclb balancer + // mode. + CredsBundleModeBalancer = "balancer" + // CredsBundleModeBackendFromBalancer switches GoogleDefaultCreds to mode + // that supports backend returned by grpclb balancer. + CredsBundleModeBackendFromBalancer = "backend-from-balancer" +) diff --git a/vendor/google.golang.org/grpc/internal/resolver/dns/dns_resolver.go b/vendor/google.golang.org/grpc/internal/resolver/dns/dns_resolver.go new file mode 100644 index 000000000..304235566 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/resolver/dns/dns_resolver.go @@ -0,0 +1,446 @@ +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package dns implements a dns resolver to be installed as the default resolver +// in grpc. +package dns + +import ( + "context" + "encoding/json" + "errors" + "fmt" + "net" + "os" + "strconv" + "strings" + "sync" + "time" + + grpclbstate "google.golang.org/grpc/balancer/grpclb/state" + "google.golang.org/grpc/grpclog" + "google.golang.org/grpc/internal/envconfig" + "google.golang.org/grpc/internal/grpcrand" + "google.golang.org/grpc/resolver" + "google.golang.org/grpc/serviceconfig" +) + +// EnableSRVLookups controls whether the DNS resolver attempts to fetch gRPCLB +// addresses from SRV records. Must not be changed after init time. +var EnableSRVLookups = false + +var logger = grpclog.Component("dns") + +func init() { + resolver.Register(NewBuilder()) +} + +const ( + defaultPort = "443" + defaultDNSSvrPort = "53" + golang = "GO" + // txtPrefix is the prefix string to be prepended to the host name for txt record lookup. + txtPrefix = "_grpc_config." + // In DNS, service config is encoded in a TXT record via the mechanism + // described in RFC-1464 using the attribute name grpc_config. + txtAttribute = "grpc_config=" +) + +var ( + errMissingAddr = errors.New("dns resolver: missing address") + + // Addresses ending with a colon that is supposed to be the separator + // between host and port is not allowed. E.g. "::" is a valid address as + // it is an IPv6 address (host only) and "[::]:" is invalid as it ends with + // a colon as the host and port separator + errEndsWithColon = errors.New("dns resolver: missing port after port-separator colon") +) + +var ( + defaultResolver netResolver = net.DefaultResolver + // To prevent excessive re-resolution, we enforce a rate limit on DNS + // resolution requests. + minDNSResRate = 30 * time.Second +) + +var customAuthorityDialler = func(authority string) func(ctx context.Context, network, address string) (net.Conn, error) { + return func(ctx context.Context, network, address string) (net.Conn, error) { + var dialer net.Dialer + return dialer.DialContext(ctx, network, authority) + } +} + +var customAuthorityResolver = func(authority string) (netResolver, error) { + host, port, err := parseTarget(authority, defaultDNSSvrPort) + if err != nil { + return nil, err + } + + authorityWithPort := net.JoinHostPort(host, port) + + return &net.Resolver{ + PreferGo: true, + Dial: customAuthorityDialler(authorityWithPort), + }, nil +} + +// NewBuilder creates a dnsBuilder which is used to factory DNS resolvers. +func NewBuilder() resolver.Builder { + return &dnsBuilder{} +} + +type dnsBuilder struct{} + +// Build creates and starts a DNS resolver that watches the name resolution of the target. +func (b *dnsBuilder) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOptions) (resolver.Resolver, error) { + host, port, err := parseTarget(target.Endpoint, defaultPort) + if err != nil { + return nil, err + } + + // IP address. + if ipAddr, ok := formatIP(host); ok { + addr := []resolver.Address{{Addr: ipAddr + ":" + port}} + cc.UpdateState(resolver.State{Addresses: addr}) + return deadResolver{}, nil + } + + // DNS address (non-IP). + ctx, cancel := context.WithCancel(context.Background()) + d := &dnsResolver{ + host: host, + port: port, + ctx: ctx, + cancel: cancel, + cc: cc, + rn: make(chan struct{}, 1), + disableServiceConfig: opts.DisableServiceConfig, + } + + if target.Authority == "" { + d.resolver = defaultResolver + } else { + d.resolver, err = customAuthorityResolver(target.Authority) + if err != nil { + return nil, err + } + } + + d.wg.Add(1) + go d.watcher() + d.ResolveNow(resolver.ResolveNowOptions{}) + return d, nil +} + +// Scheme returns the naming scheme of this resolver builder, which is "dns". +func (b *dnsBuilder) Scheme() string { + return "dns" +} + +type netResolver interface { + LookupHost(ctx context.Context, host string) (addrs []string, err error) + LookupSRV(ctx context.Context, service, proto, name string) (cname string, addrs []*net.SRV, err error) + LookupTXT(ctx context.Context, name string) (txts []string, err error) +} + +// deadResolver is a resolver that does nothing. +type deadResolver struct{} + +func (deadResolver) ResolveNow(resolver.ResolveNowOptions) {} + +func (deadResolver) Close() {} + +// dnsResolver watches for the name resolution update for a non-IP target. +type dnsResolver struct { + host string + port string + resolver netResolver + ctx context.Context + cancel context.CancelFunc + cc resolver.ClientConn + // rn channel is used by ResolveNow() to force an immediate resolution of the target. + rn chan struct{} + // wg is used to enforce Close() to return after the watcher() goroutine has finished. + // Otherwise, data race will be possible. [Race Example] in dns_resolver_test we + // replace the real lookup functions with mocked ones to facilitate testing. + // If Close() doesn't wait for watcher() goroutine finishes, race detector sometimes + // will warns lookup (READ the lookup function pointers) inside watcher() goroutine + // has data race with replaceNetFunc (WRITE the lookup function pointers). + wg sync.WaitGroup + disableServiceConfig bool +} + +// ResolveNow invoke an immediate resolution of the target that this dnsResolver watches. +func (d *dnsResolver) ResolveNow(resolver.ResolveNowOptions) { + select { + case d.rn <- struct{}{}: + default: + } +} + +// Close closes the dnsResolver. +func (d *dnsResolver) Close() { + d.cancel() + d.wg.Wait() +} + +func (d *dnsResolver) watcher() { + defer d.wg.Done() + for { + select { + case <-d.ctx.Done(): + return + case <-d.rn: + } + + state, err := d.lookup() + if err != nil { + d.cc.ReportError(err) + } else { + d.cc.UpdateState(*state) + } + + // Sleep to prevent excessive re-resolutions. Incoming resolution requests + // will be queued in d.rn. + t := time.NewTimer(minDNSResRate) + select { + case <-t.C: + case <-d.ctx.Done(): + t.Stop() + return + } + } +} + +func (d *dnsResolver) lookupSRV() ([]resolver.Address, error) { + if !EnableSRVLookups { + return nil, nil + } + var newAddrs []resolver.Address + _, srvs, err := d.resolver.LookupSRV(d.ctx, "grpclb", "tcp", d.host) + if err != nil { + err = handleDNSError(err, "SRV") // may become nil + return nil, err + } + for _, s := range srvs { + lbAddrs, err := d.resolver.LookupHost(d.ctx, s.Target) + if err != nil { + err = handleDNSError(err, "A") // may become nil + if err == nil { + // If there are other SRV records, look them up and ignore this + // one that does not exist. + continue + } + return nil, err + } + for _, a := range lbAddrs { + ip, ok := formatIP(a) + if !ok { + return nil, fmt.Errorf("dns: error parsing A record IP address %v", a) + } + addr := ip + ":" + strconv.Itoa(int(s.Port)) + newAddrs = append(newAddrs, resolver.Address{Addr: addr, ServerName: s.Target}) + } + } + return newAddrs, nil +} + +var filterError = func(err error) error { + if dnsErr, ok := err.(*net.DNSError); ok && !dnsErr.IsTimeout && !dnsErr.IsTemporary { + // Timeouts and temporary errors should be communicated to gRPC to + // attempt another DNS query (with backoff). Other errors should be + // suppressed (they may represent the absence of a TXT record). + return nil + } + return err +} + +func handleDNSError(err error, lookupType string) error { + err = filterError(err) + if err != nil { + err = fmt.Errorf("dns: %v record lookup error: %v", lookupType, err) + logger.Info(err) + } + return err +} + +func (d *dnsResolver) lookupTXT() *serviceconfig.ParseResult { + ss, err := d.resolver.LookupTXT(d.ctx, txtPrefix+d.host) + if err != nil { + if envconfig.TXTErrIgnore { + return nil + } + if err = handleDNSError(err, "TXT"); err != nil { + return &serviceconfig.ParseResult{Err: err} + } + return nil + } + var res string + for _, s := range ss { + res += s + } + + // TXT record must have "grpc_config=" attribute in order to be used as service config. + if !strings.HasPrefix(res, txtAttribute) { + logger.Warningf("dns: TXT record %v missing %v attribute", res, txtAttribute) + // This is not an error; it is the equivalent of not having a service config. + return nil + } + sc := canaryingSC(strings.TrimPrefix(res, txtAttribute)) + return d.cc.ParseServiceConfig(sc) +} + +func (d *dnsResolver) lookupHost() ([]resolver.Address, error) { + var newAddrs []resolver.Address + addrs, err := d.resolver.LookupHost(d.ctx, d.host) + if err != nil { + err = handleDNSError(err, "A") + return nil, err + } + for _, a := range addrs { + ip, ok := formatIP(a) + if !ok { + return nil, fmt.Errorf("dns: error parsing A record IP address %v", a) + } + addr := ip + ":" + d.port + newAddrs = append(newAddrs, resolver.Address{Addr: addr}) + } + return newAddrs, nil +} + +func (d *dnsResolver) lookup() (*resolver.State, error) { + srv, srvErr := d.lookupSRV() + addrs, hostErr := d.lookupHost() + if hostErr != nil && (srvErr != nil || len(srv) == 0) { + return nil, hostErr + } + + state := resolver.State{Addresses: addrs} + if len(srv) > 0 { + state = grpclbstate.Set(state, &grpclbstate.State{BalancerAddresses: srv}) + } + if !d.disableServiceConfig { + state.ServiceConfig = d.lookupTXT() + } + return &state, nil +} + +// formatIP returns ok = false if addr is not a valid textual representation of an IP address. +// If addr is an IPv4 address, return the addr and ok = true. +// If addr is an IPv6 address, return the addr enclosed in square brackets and ok = true. +func formatIP(addr string) (addrIP string, ok bool) { + ip := net.ParseIP(addr) + if ip == nil { + return "", false + } + if ip.To4() != nil { + return addr, true + } + return "[" + addr + "]", true +} + +// parseTarget takes the user input target string and default port, returns formatted host and port info. +// If target doesn't specify a port, set the port to be the defaultPort. +// If target is in IPv6 format and host-name is enclosed in square brackets, brackets +// are stripped when setting the host. +// examples: +// target: "www.google.com" defaultPort: "443" returns host: "www.google.com", port: "443" +// target: "ipv4-host:80" defaultPort: "443" returns host: "ipv4-host", port: "80" +// target: "[ipv6-host]" defaultPort: "443" returns host: "ipv6-host", port: "443" +// target: ":80" defaultPort: "443" returns host: "localhost", port: "80" +func parseTarget(target, defaultPort string) (host, port string, err error) { + if target == "" { + return "", "", errMissingAddr + } + if ip := net.ParseIP(target); ip != nil { + // target is an IPv4 or IPv6(without brackets) address + return target, defaultPort, nil + } + if host, port, err = net.SplitHostPort(target); err == nil { + if port == "" { + // If the port field is empty (target ends with colon), e.g. "[::1]:", this is an error. + return "", "", errEndsWithColon + } + // target has port, i.e ipv4-host:port, [ipv6-host]:port, host-name:port + if host == "" { + // Keep consistent with net.Dial(): If the host is empty, as in ":80", the local system is assumed. + host = "localhost" + } + return host, port, nil + } + if host, port, err = net.SplitHostPort(target + ":" + defaultPort); err == nil { + // target doesn't have port + return host, port, nil + } + return "", "", fmt.Errorf("invalid target address %v, error info: %v", target, err) +} + +type rawChoice struct { + ClientLanguage *[]string `json:"clientLanguage,omitempty"` + Percentage *int `json:"percentage,omitempty"` + ClientHostName *[]string `json:"clientHostName,omitempty"` + ServiceConfig *json.RawMessage `json:"serviceConfig,omitempty"` +} + +func containsString(a *[]string, b string) bool { + if a == nil { + return true + } + for _, c := range *a { + if c == b { + return true + } + } + return false +} + +func chosenByPercentage(a *int) bool { + if a == nil { + return true + } + return grpcrand.Intn(100)+1 <= *a +} + +func canaryingSC(js string) string { + if js == "" { + return "" + } + var rcs []rawChoice + err := json.Unmarshal([]byte(js), &rcs) + if err != nil { + logger.Warningf("dns: error parsing service config json: %v", err) + return "" + } + cliHostname, err := os.Hostname() + if err != nil { + logger.Warningf("dns: error getting client hostname: %v", err) + return "" + } + var sc string + for _, c := range rcs { + if !containsString(c.ClientLanguage, golang) || + !chosenByPercentage(c.Percentage) || + !containsString(c.ClientHostName, cliHostname) || + c.ServiceConfig == nil { + continue + } + sc = string(*c.ServiceConfig) + break + } + return sc +} diff --git a/vendor/google.golang.org/grpc/internal/resolver/dns/go113.go b/vendor/google.golang.org/grpc/internal/resolver/dns/go113.go new file mode 100644 index 000000000..8783a8cf8 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/resolver/dns/go113.go @@ -0,0 +1,33 @@ +// +build go1.13 + +/* + * + * Copyright 2019 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package dns + +import "net" + +func init() { + filterError = func(err error) error { + if dnsErr, ok := err.(*net.DNSError); ok && dnsErr.IsNotFound { + // The name does not exist; not an error. + return nil + } + return err + } +} diff --git a/vendor/google.golang.org/grpc/internal/resolver/passthrough/passthrough.go b/vendor/google.golang.org/grpc/internal/resolver/passthrough/passthrough.go new file mode 100644 index 000000000..520d9229e --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/resolver/passthrough/passthrough.go @@ -0,0 +1,57 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package passthrough implements a pass-through resolver. It sends the target +// name without scheme back to gRPC as resolved address. +package passthrough + +import "google.golang.org/grpc/resolver" + +const scheme = "passthrough" + +type passthroughBuilder struct{} + +func (*passthroughBuilder) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOptions) (resolver.Resolver, error) { + r := &passthroughResolver{ + target: target, + cc: cc, + } + r.start() + return r, nil +} + +func (*passthroughBuilder) Scheme() string { + return scheme +} + +type passthroughResolver struct { + target resolver.Target + cc resolver.ClientConn +} + +func (r *passthroughResolver) start() { + r.cc.UpdateState(resolver.State{Addresses: []resolver.Address{{Addr: r.target.Endpoint}}}) +} + +func (*passthroughResolver) ResolveNow(o resolver.ResolveNowOptions) {} + +func (*passthroughResolver) Close() {} + +func init() { + resolver.Register(&passthroughBuilder{}) +} diff --git a/vendor/google.golang.org/grpc/internal/serviceconfig/serviceconfig.go b/vendor/google.golang.org/grpc/internal/serviceconfig/serviceconfig.go new file mode 100644 index 000000000..af3e2b5f7 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/serviceconfig/serviceconfig.go @@ -0,0 +1,106 @@ +/* + * + * Copyright 2020 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package serviceconfig contains utility functions to parse service config. +package serviceconfig + +import ( + "encoding/json" + "fmt" + + "google.golang.org/grpc/balancer" + "google.golang.org/grpc/grpclog" + externalserviceconfig "google.golang.org/grpc/serviceconfig" +) + +var logger = grpclog.Component("core") + +// BalancerConfig wraps the name and config associated with one load balancing +// policy. It corresponds to a single entry of the loadBalancingConfig field +// from ServiceConfig. +// +// It implements the json.Unmarshaler interface. +// +// https://github.com/grpc/grpc-proto/blob/54713b1e8bc6ed2d4f25fb4dff527842150b91b2/grpc/service_config/service_config.proto#L247 +type BalancerConfig struct { + Name string + Config externalserviceconfig.LoadBalancingConfig +} + +type intermediateBalancerConfig []map[string]json.RawMessage + +// UnmarshalJSON implements the json.Unmarshaler interface. +// +// ServiceConfig contains a list of loadBalancingConfigs, each with a name and +// config. This method iterates through that list in order, and stops at the +// first policy that is supported. +// - If the config for the first supported policy is invalid, the whole service +// config is invalid. +// - If the list doesn't contain any supported policy, the whole service config +// is invalid. +func (bc *BalancerConfig) UnmarshalJSON(b []byte) error { + var ir intermediateBalancerConfig + err := json.Unmarshal(b, &ir) + if err != nil { + return err + } + + for i, lbcfg := range ir { + if len(lbcfg) != 1 { + return fmt.Errorf("invalid loadBalancingConfig: entry %v does not contain exactly 1 policy/config pair: %q", i, lbcfg) + } + + var ( + name string + jsonCfg json.RawMessage + ) + // Get the key:value pair from the map. We have already made sure that + // the map contains a single entry. + for name, jsonCfg = range lbcfg { + } + + builder := balancer.Get(name) + if builder == nil { + // If the balancer is not registered, move on to the next config. + // This is not an error. + continue + } + bc.Name = name + + parser, ok := builder.(balancer.ConfigParser) + if !ok { + if string(jsonCfg) != "{}" { + logger.Warningf("non-empty balancer configuration %q, but balancer does not implement ParseConfig", string(jsonCfg)) + } + // Stop at this, though the builder doesn't support parsing config. + return nil + } + + cfg, err := parser.ParseConfig(jsonCfg) + if err != nil { + return fmt.Errorf("error parsing loadBalancingConfig for policy %q: %v", name, err) + } + bc.Config = cfg + return nil + } + // This is reached when the for loop iterates over all entries, but didn't + // return. This means we had a loadBalancingConfig slice but did not + // encounter a registered policy. The config is considered invalid in this + // case. + return fmt.Errorf("invalid loadBalancingConfig: no supported policies found") +} diff --git a/vendor/google.golang.org/grpc/internal/status/status.go b/vendor/google.golang.org/grpc/internal/status/status.go index 681260692..710223b8d 100644 --- a/vendor/google.golang.org/grpc/internal/status/status.go +++ b/vendor/google.golang.org/grpc/internal/status/status.go @@ -97,7 +97,7 @@ func (s *Status) Err() error { if s.Code() == codes.OK { return nil } - return (*Error)(s.Proto()) + return &Error{e: s.Proto()} } // WithDetails returns a new status with the provided details messages appended to the status. @@ -136,26 +136,27 @@ func (s *Status) Details() []interface{} { return details } -// Error is an alias of a status proto. It implements error and Status, -// and a nil Error should never be returned by this package. -type Error spb.Status +// Error wraps a pointer of a status proto. It implements error and Status, +// and a nil *Error should never be returned by this package. +type Error struct { + e *spb.Status +} -func (se *Error) Error() string { - p := (*spb.Status)(se) - return fmt.Sprintf("rpc error: code = %s desc = %s", codes.Code(p.GetCode()), p.GetMessage()) +func (e *Error) Error() string { + return fmt.Sprintf("rpc error: code = %s desc = %s", codes.Code(e.e.GetCode()), e.e.GetMessage()) } // GRPCStatus returns the Status represented by se. -func (se *Error) GRPCStatus() *Status { - return FromProto((*spb.Status)(se)) +func (e *Error) GRPCStatus() *Status { + return FromProto(e.e) } // Is implements future error.Is functionality. // A Error is equivalent if the code and message are identical. -func (se *Error) Is(target error) bool { +func (e *Error) Is(target error) bool { tse, ok := target.(*Error) if !ok { return false } - return proto.Equal((*spb.Status)(se), (*spb.Status)(tse)) + return proto.Equal(e.e, tse.e) } diff --git a/vendor/google.golang.org/grpc/internal/syscall/syscall_linux.go b/vendor/google.golang.org/grpc/internal/syscall/syscall_linux.go new file mode 100644 index 000000000..2fdcb76e6 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/syscall/syscall_linux.go @@ -0,0 +1,116 @@ +// +build !appengine + +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package syscall provides functionalities that grpc uses to get low-level operating system +// stats/info. +package syscall + +import ( + "fmt" + "net" + "syscall" + "time" + + "golang.org/x/sys/unix" + "google.golang.org/grpc/grpclog" +) + +var logger = grpclog.Component("core") + +// GetCPUTime returns the how much CPU time has passed since the start of this process. +func GetCPUTime() int64 { + var ts unix.Timespec + if err := unix.ClockGettime(unix.CLOCK_PROCESS_CPUTIME_ID, &ts); err != nil { + logger.Fatal(err) + } + return ts.Nano() +} + +// Rusage is an alias for syscall.Rusage under linux environment. +type Rusage syscall.Rusage + +// GetRusage returns the resource usage of current process. +func GetRusage() (rusage *Rusage) { + rusage = new(Rusage) + syscall.Getrusage(syscall.RUSAGE_SELF, (*syscall.Rusage)(rusage)) + return +} + +// CPUTimeDiff returns the differences of user CPU time and system CPU time used +// between two Rusage structs. +func CPUTimeDiff(first *Rusage, latest *Rusage) (float64, float64) { + f := (*syscall.Rusage)(first) + l := (*syscall.Rusage)(latest) + var ( + utimeDiffs = l.Utime.Sec - f.Utime.Sec + utimeDiffus = l.Utime.Usec - f.Utime.Usec + stimeDiffs = l.Stime.Sec - f.Stime.Sec + stimeDiffus = l.Stime.Usec - f.Stime.Usec + ) + + uTimeElapsed := float64(utimeDiffs) + float64(utimeDiffus)*1.0e-6 + sTimeElapsed := float64(stimeDiffs) + float64(stimeDiffus)*1.0e-6 + + return uTimeElapsed, sTimeElapsed +} + +// SetTCPUserTimeout sets the TCP user timeout on a connection's socket +func SetTCPUserTimeout(conn net.Conn, timeout time.Duration) error { + tcpconn, ok := conn.(*net.TCPConn) + if !ok { + // not a TCP connection. exit early + return nil + } + rawConn, err := tcpconn.SyscallConn() + if err != nil { + return fmt.Errorf("error getting raw connection: %v", err) + } + err = rawConn.Control(func(fd uintptr) { + err = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, unix.TCP_USER_TIMEOUT, int(timeout/time.Millisecond)) + }) + if err != nil { + return fmt.Errorf("error setting option on socket: %v", err) + } + + return nil +} + +// GetTCPUserTimeout gets the TCP user timeout on a connection's socket +func GetTCPUserTimeout(conn net.Conn) (opt int, err error) { + tcpconn, ok := conn.(*net.TCPConn) + if !ok { + err = fmt.Errorf("conn is not *net.TCPConn. got %T", conn) + return + } + rawConn, err := tcpconn.SyscallConn() + if err != nil { + err = fmt.Errorf("error getting raw connection: %v", err) + return + } + err = rawConn.Control(func(fd uintptr) { + opt, err = syscall.GetsockoptInt(int(fd), syscall.IPPROTO_TCP, unix.TCP_USER_TIMEOUT) + }) + if err != nil { + err = fmt.Errorf("error getting option on socket: %v", err) + return + } + + return +} diff --git a/vendor/google.golang.org/grpc/internal/syscall/syscall_nonlinux.go b/vendor/google.golang.org/grpc/internal/syscall/syscall_nonlinux.go new file mode 100644 index 000000000..adae60d65 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/syscall/syscall_nonlinux.go @@ -0,0 +1,76 @@ +// +build !linux appengine + +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package syscall provides functionalities that grpc uses to get low-level +// operating system stats/info. +package syscall + +import ( + "net" + "sync" + "time" + + "google.golang.org/grpc/grpclog" +) + +var once sync.Once +var logger = grpclog.Component("core") + +func log() { + once.Do(func() { + logger.Info("CPU time info is unavailable on non-linux or appengine environment.") + }) +} + +// GetCPUTime returns the how much CPU time has passed since the start of this process. +// It always returns 0 under non-linux or appengine environment. +func GetCPUTime() int64 { + log() + return 0 +} + +// Rusage is an empty struct under non-linux or appengine environment. +type Rusage struct{} + +// GetRusage is a no-op function under non-linux or appengine environment. +func GetRusage() (rusage *Rusage) { + log() + return nil +} + +// CPUTimeDiff returns the differences of user CPU time and system CPU time used +// between two Rusage structs. It a no-op function for non-linux or appengine environment. +func CPUTimeDiff(first *Rusage, latest *Rusage) (float64, float64) { + log() + return 0, 0 +} + +// SetTCPUserTimeout is a no-op function under non-linux or appengine environments +func SetTCPUserTimeout(conn net.Conn, timeout time.Duration) error { + log() + return nil +} + +// GetTCPUserTimeout is a no-op function under non-linux or appengine environments +// a negative return value indicates the operation is not supported +func GetTCPUserTimeout(conn net.Conn) (int, error) { + log() + return -1, nil +} diff --git a/vendor/google.golang.org/grpc/internal/transport/bdp_estimator.go b/vendor/google.golang.org/grpc/internal/transport/bdp_estimator.go new file mode 100644 index 000000000..070680edb --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/transport/bdp_estimator.go @@ -0,0 +1,141 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package transport + +import ( + "sync" + "time" +) + +const ( + // bdpLimit is the maximum value the flow control windows will be increased + // to. TCP typically limits this to 4MB, but some systems go up to 16MB. + // Since this is only a limit, it is safe to make it optimistic. + bdpLimit = (1 << 20) * 16 + // alpha is a constant factor used to keep a moving average + // of RTTs. + alpha = 0.9 + // If the current bdp sample is greater than or equal to + // our beta * our estimated bdp and the current bandwidth + // sample is the maximum bandwidth observed so far, we + // increase our bbp estimate by a factor of gamma. + beta = 0.66 + // To put our bdp to be smaller than or equal to twice the real BDP, + // we should multiply our current sample with 4/3, however to round things out + // we use 2 as the multiplication factor. + gamma = 2 +) + +// Adding arbitrary data to ping so that its ack can be identified. +// Easter-egg: what does the ping message say? +var bdpPing = &ping{data: [8]byte{2, 4, 16, 16, 9, 14, 7, 7}} + +type bdpEstimator struct { + // sentAt is the time when the ping was sent. + sentAt time.Time + + mu sync.Mutex + // bdp is the current bdp estimate. + bdp uint32 + // sample is the number of bytes received in one measurement cycle. + sample uint32 + // bwMax is the maximum bandwidth noted so far (bytes/sec). + bwMax float64 + // bool to keep track of the beginning of a new measurement cycle. + isSent bool + // Callback to update the window sizes. + updateFlowControl func(n uint32) + // sampleCount is the number of samples taken so far. + sampleCount uint64 + // round trip time (seconds) + rtt float64 +} + +// timesnap registers the time bdp ping was sent out so that +// network rtt can be calculated when its ack is received. +// It is called (by controller) when the bdpPing is +// being written on the wire. +func (b *bdpEstimator) timesnap(d [8]byte) { + if bdpPing.data != d { + return + } + b.sentAt = time.Now() +} + +// add adds bytes to the current sample for calculating bdp. +// It returns true only if a ping must be sent. This can be used +// by the caller (handleData) to make decision about batching +// a window update with it. +func (b *bdpEstimator) add(n uint32) bool { + b.mu.Lock() + defer b.mu.Unlock() + if b.bdp == bdpLimit { + return false + } + if !b.isSent { + b.isSent = true + b.sample = n + b.sentAt = time.Time{} + b.sampleCount++ + return true + } + b.sample += n + return false +} + +// calculate is called when an ack for a bdp ping is received. +// Here we calculate the current bdp and bandwidth sample and +// decide if the flow control windows should go up. +func (b *bdpEstimator) calculate(d [8]byte) { + // Check if the ping acked for was the bdp ping. + if bdpPing.data != d { + return + } + b.mu.Lock() + rttSample := time.Since(b.sentAt).Seconds() + if b.sampleCount < 10 { + // Bootstrap rtt with an average of first 10 rtt samples. + b.rtt += (rttSample - b.rtt) / float64(b.sampleCount) + } else { + // Heed to the recent past more. + b.rtt += (rttSample - b.rtt) * float64(alpha) + } + b.isSent = false + // The number of bytes accumulated so far in the sample is smaller + // than or equal to 1.5 times the real BDP on a saturated connection. + bwCurrent := float64(b.sample) / (b.rtt * float64(1.5)) + if bwCurrent > b.bwMax { + b.bwMax = bwCurrent + } + // If the current sample (which is smaller than or equal to the 1.5 times the real BDP) is + // greater than or equal to 2/3rd our perceived bdp AND this is the maximum bandwidth seen so far, we + // should update our perception of the network BDP. + if float64(b.sample) >= beta*float64(b.bdp) && bwCurrent == b.bwMax && b.bdp != bdpLimit { + sampleFloat := float64(b.sample) + b.bdp = uint32(gamma * sampleFloat) + if b.bdp > bdpLimit { + b.bdp = bdpLimit + } + bdp := b.bdp + b.mu.Unlock() + b.updateFlowControl(bdp) + return + } + b.mu.Unlock() +} diff --git a/vendor/google.golang.org/grpc/internal/transport/controlbuf.go b/vendor/google.golang.org/grpc/internal/transport/controlbuf.go new file mode 100644 index 000000000..40ef23923 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/transport/controlbuf.go @@ -0,0 +1,942 @@ +/* + * + * Copyright 2014 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package transport + +import ( + "bytes" + "fmt" + "runtime" + "sync" + "sync/atomic" + + "golang.org/x/net/http2" + "golang.org/x/net/http2/hpack" +) + +var updateHeaderTblSize = func(e *hpack.Encoder, v uint32) { + e.SetMaxDynamicTableSizeLimit(v) +} + +type itemNode struct { + it interface{} + next *itemNode +} + +type itemList struct { + head *itemNode + tail *itemNode +} + +func (il *itemList) enqueue(i interface{}) { + n := &itemNode{it: i} + if il.tail == nil { + il.head, il.tail = n, n + return + } + il.tail.next = n + il.tail = n +} + +// peek returns the first item in the list without removing it from the +// list. +func (il *itemList) peek() interface{} { + return il.head.it +} + +func (il *itemList) dequeue() interface{} { + if il.head == nil { + return nil + } + i := il.head.it + il.head = il.head.next + if il.head == nil { + il.tail = nil + } + return i +} + +func (il *itemList) dequeueAll() *itemNode { + h := il.head + il.head, il.tail = nil, nil + return h +} + +func (il *itemList) isEmpty() bool { + return il.head == nil +} + +// The following defines various control items which could flow through +// the control buffer of transport. They represent different aspects of +// control tasks, e.g., flow control, settings, streaming resetting, etc. + +// maxQueuedTransportResponseFrames is the most queued "transport response" +// frames we will buffer before preventing new reads from occurring on the +// transport. These are control frames sent in response to client requests, +// such as RST_STREAM due to bad headers or settings acks. +const maxQueuedTransportResponseFrames = 50 + +type cbItem interface { + isTransportResponseFrame() bool +} + +// registerStream is used to register an incoming stream with loopy writer. +type registerStream struct { + streamID uint32 + wq *writeQuota +} + +func (*registerStream) isTransportResponseFrame() bool { return false } + +// headerFrame is also used to register stream on the client-side. +type headerFrame struct { + streamID uint32 + hf []hpack.HeaderField + endStream bool // Valid on server side. + initStream func(uint32) error // Used only on the client side. + onWrite func() + wq *writeQuota // write quota for the stream created. + cleanup *cleanupStream // Valid on the server side. + onOrphaned func(error) // Valid on client-side +} + +func (h *headerFrame) isTransportResponseFrame() bool { + return h.cleanup != nil && h.cleanup.rst // Results in a RST_STREAM +} + +type cleanupStream struct { + streamID uint32 + rst bool + rstCode http2.ErrCode + onWrite func() +} + +func (c *cleanupStream) isTransportResponseFrame() bool { return c.rst } // Results in a RST_STREAM + +type dataFrame struct { + streamID uint32 + endStream bool + h []byte + d []byte + // onEachWrite is called every time + // a part of d is written out. + onEachWrite func() +} + +func (*dataFrame) isTransportResponseFrame() bool { return false } + +type incomingWindowUpdate struct { + streamID uint32 + increment uint32 +} + +func (*incomingWindowUpdate) isTransportResponseFrame() bool { return false } + +type outgoingWindowUpdate struct { + streamID uint32 + increment uint32 +} + +func (*outgoingWindowUpdate) isTransportResponseFrame() bool { + return false // window updates are throttled by thresholds +} + +type incomingSettings struct { + ss []http2.Setting +} + +func (*incomingSettings) isTransportResponseFrame() bool { return true } // Results in a settings ACK + +type outgoingSettings struct { + ss []http2.Setting +} + +func (*outgoingSettings) isTransportResponseFrame() bool { return false } + +type incomingGoAway struct { +} + +func (*incomingGoAway) isTransportResponseFrame() bool { return false } + +type goAway struct { + code http2.ErrCode + debugData []byte + headsUp bool + closeConn bool +} + +func (*goAway) isTransportResponseFrame() bool { return false } + +type ping struct { + ack bool + data [8]byte +} + +func (*ping) isTransportResponseFrame() bool { return true } + +type outFlowControlSizeRequest struct { + resp chan uint32 +} + +func (*outFlowControlSizeRequest) isTransportResponseFrame() bool { return false } + +type outStreamState int + +const ( + active outStreamState = iota + empty + waitingOnStreamQuota +) + +type outStream struct { + id uint32 + state outStreamState + itl *itemList + bytesOutStanding int + wq *writeQuota + + next *outStream + prev *outStream +} + +func (s *outStream) deleteSelf() { + if s.prev != nil { + s.prev.next = s.next + } + if s.next != nil { + s.next.prev = s.prev + } + s.next, s.prev = nil, nil +} + +type outStreamList struct { + // Following are sentinel objects that mark the + // beginning and end of the list. They do not + // contain any item lists. All valid objects are + // inserted in between them. + // This is needed so that an outStream object can + // deleteSelf() in O(1) time without knowing which + // list it belongs to. + head *outStream + tail *outStream +} + +func newOutStreamList() *outStreamList { + head, tail := new(outStream), new(outStream) + head.next = tail + tail.prev = head + return &outStreamList{ + head: head, + tail: tail, + } +} + +func (l *outStreamList) enqueue(s *outStream) { + e := l.tail.prev + e.next = s + s.prev = e + s.next = l.tail + l.tail.prev = s +} + +// remove from the beginning of the list. +func (l *outStreamList) dequeue() *outStream { + b := l.head.next + if b == l.tail { + return nil + } + b.deleteSelf() + return b +} + +// controlBuffer is a way to pass information to loopy. +// Information is passed as specific struct types called control frames. +// A control frame not only represents data, messages or headers to be sent out +// but can also be used to instruct loopy to update its internal state. +// It shouldn't be confused with an HTTP2 frame, although some of the control frames +// like dataFrame and headerFrame do go out on wire as HTTP2 frames. +type controlBuffer struct { + ch chan struct{} + done <-chan struct{} + mu sync.Mutex + consumerWaiting bool + list *itemList + err error + + // transportResponseFrames counts the number of queued items that represent + // the response of an action initiated by the peer. trfChan is created + // when transportResponseFrames >= maxQueuedTransportResponseFrames and is + // closed and nilled when transportResponseFrames drops below the + // threshold. Both fields are protected by mu. + transportResponseFrames int + trfChan atomic.Value // *chan struct{} +} + +func newControlBuffer(done <-chan struct{}) *controlBuffer { + return &controlBuffer{ + ch: make(chan struct{}, 1), + list: &itemList{}, + done: done, + } +} + +// throttle blocks if there are too many incomingSettings/cleanupStreams in the +// controlbuf. +func (c *controlBuffer) throttle() { + ch, _ := c.trfChan.Load().(*chan struct{}) + if ch != nil { + select { + case <-*ch: + case <-c.done: + } + } +} + +func (c *controlBuffer) put(it cbItem) error { + _, err := c.executeAndPut(nil, it) + return err +} + +func (c *controlBuffer) executeAndPut(f func(it interface{}) bool, it cbItem) (bool, error) { + var wakeUp bool + c.mu.Lock() + if c.err != nil { + c.mu.Unlock() + return false, c.err + } + if f != nil { + if !f(it) { // f wasn't successful + c.mu.Unlock() + return false, nil + } + } + if c.consumerWaiting { + wakeUp = true + c.consumerWaiting = false + } + c.list.enqueue(it) + if it.isTransportResponseFrame() { + c.transportResponseFrames++ + if c.transportResponseFrames == maxQueuedTransportResponseFrames { + // We are adding the frame that puts us over the threshold; create + // a throttling channel. + ch := make(chan struct{}) + c.trfChan.Store(&ch) + } + } + c.mu.Unlock() + if wakeUp { + select { + case c.ch <- struct{}{}: + default: + } + } + return true, nil +} + +// Note argument f should never be nil. +func (c *controlBuffer) execute(f func(it interface{}) bool, it interface{}) (bool, error) { + c.mu.Lock() + if c.err != nil { + c.mu.Unlock() + return false, c.err + } + if !f(it) { // f wasn't successful + c.mu.Unlock() + return false, nil + } + c.mu.Unlock() + return true, nil +} + +func (c *controlBuffer) get(block bool) (interface{}, error) { + for { + c.mu.Lock() + if c.err != nil { + c.mu.Unlock() + return nil, c.err + } + if !c.list.isEmpty() { + h := c.list.dequeue().(cbItem) + if h.isTransportResponseFrame() { + if c.transportResponseFrames == maxQueuedTransportResponseFrames { + // We are removing the frame that put us over the + // threshold; close and clear the throttling channel. + ch := c.trfChan.Load().(*chan struct{}) + close(*ch) + c.trfChan.Store((*chan struct{})(nil)) + } + c.transportResponseFrames-- + } + c.mu.Unlock() + return h, nil + } + if !block { + c.mu.Unlock() + return nil, nil + } + c.consumerWaiting = true + c.mu.Unlock() + select { + case <-c.ch: + case <-c.done: + c.finish() + return nil, ErrConnClosing + } + } +} + +func (c *controlBuffer) finish() { + c.mu.Lock() + if c.err != nil { + c.mu.Unlock() + return + } + c.err = ErrConnClosing + // There may be headers for streams in the control buffer. + // These streams need to be cleaned out since the transport + // is still not aware of these yet. + for head := c.list.dequeueAll(); head != nil; head = head.next { + hdr, ok := head.it.(*headerFrame) + if !ok { + continue + } + if hdr.onOrphaned != nil { // It will be nil on the server-side. + hdr.onOrphaned(ErrConnClosing) + } + } + c.mu.Unlock() +} + +type side int + +const ( + clientSide side = iota + serverSide +) + +// Loopy receives frames from the control buffer. +// Each frame is handled individually; most of the work done by loopy goes +// into handling data frames. Loopy maintains a queue of active streams, and each +// stream maintains a queue of data frames; as loopy receives data frames +// it gets added to the queue of the relevant stream. +// Loopy goes over this list of active streams by processing one node every iteration, +// thereby closely resemebling to a round-robin scheduling over all streams. While +// processing a stream, loopy writes out data bytes from this stream capped by the min +// of http2MaxFrameLen, connection-level flow control and stream-level flow control. +type loopyWriter struct { + side side + cbuf *controlBuffer + sendQuota uint32 + oiws uint32 // outbound initial window size. + // estdStreams is map of all established streams that are not cleaned-up yet. + // On client-side, this is all streams whose headers were sent out. + // On server-side, this is all streams whose headers were received. + estdStreams map[uint32]*outStream // Established streams. + // activeStreams is a linked-list of all streams that have data to send and some + // stream-level flow control quota. + // Each of these streams internally have a list of data items(and perhaps trailers + // on the server-side) to be sent out. + activeStreams *outStreamList + framer *framer + hBuf *bytes.Buffer // The buffer for HPACK encoding. + hEnc *hpack.Encoder // HPACK encoder. + bdpEst *bdpEstimator + draining bool + + // Side-specific handlers + ssGoAwayHandler func(*goAway) (bool, error) +} + +func newLoopyWriter(s side, fr *framer, cbuf *controlBuffer, bdpEst *bdpEstimator) *loopyWriter { + var buf bytes.Buffer + l := &loopyWriter{ + side: s, + cbuf: cbuf, + sendQuota: defaultWindowSize, + oiws: defaultWindowSize, + estdStreams: make(map[uint32]*outStream), + activeStreams: newOutStreamList(), + framer: fr, + hBuf: &buf, + hEnc: hpack.NewEncoder(&buf), + bdpEst: bdpEst, + } + return l +} + +const minBatchSize = 1000 + +// run should be run in a separate goroutine. +// It reads control frames from controlBuf and processes them by: +// 1. Updating loopy's internal state, or/and +// 2. Writing out HTTP2 frames on the wire. +// +// Loopy keeps all active streams with data to send in a linked-list. +// All streams in the activeStreams linked-list must have both: +// 1. Data to send, and +// 2. Stream level flow control quota available. +// +// In each iteration of run loop, other than processing the incoming control +// frame, loopy calls processData, which processes one node from the activeStreams linked-list. +// This results in writing of HTTP2 frames into an underlying write buffer. +// When there's no more control frames to read from controlBuf, loopy flushes the write buffer. +// As an optimization, to increase the batch size for each flush, loopy yields the processor, once +// if the batch size is too low to give stream goroutines a chance to fill it up. +func (l *loopyWriter) run() (err error) { + defer func() { + if err == ErrConnClosing { + // Don't log ErrConnClosing as error since it happens + // 1. When the connection is closed by some other known issue. + // 2. User closed the connection. + // 3. A graceful close of connection. + if logger.V(logLevel) { + logger.Infof("transport: loopyWriter.run returning. %v", err) + } + err = nil + } + }() + for { + it, err := l.cbuf.get(true) + if err != nil { + return err + } + if err = l.handle(it); err != nil { + return err + } + if _, err = l.processData(); err != nil { + return err + } + gosched := true + hasdata: + for { + it, err := l.cbuf.get(false) + if err != nil { + return err + } + if it != nil { + if err = l.handle(it); err != nil { + return err + } + if _, err = l.processData(); err != nil { + return err + } + continue hasdata + } + isEmpty, err := l.processData() + if err != nil { + return err + } + if !isEmpty { + continue hasdata + } + if gosched { + gosched = false + if l.framer.writer.offset < minBatchSize { + runtime.Gosched() + continue hasdata + } + } + l.framer.writer.Flush() + break hasdata + + } + } +} + +func (l *loopyWriter) outgoingWindowUpdateHandler(w *outgoingWindowUpdate) error { + return l.framer.fr.WriteWindowUpdate(w.streamID, w.increment) +} + +func (l *loopyWriter) incomingWindowUpdateHandler(w *incomingWindowUpdate) error { + // Otherwise update the quota. + if w.streamID == 0 { + l.sendQuota += w.increment + return nil + } + // Find the stream and update it. + if str, ok := l.estdStreams[w.streamID]; ok { + str.bytesOutStanding -= int(w.increment) + if strQuota := int(l.oiws) - str.bytesOutStanding; strQuota > 0 && str.state == waitingOnStreamQuota { + str.state = active + l.activeStreams.enqueue(str) + return nil + } + } + return nil +} + +func (l *loopyWriter) outgoingSettingsHandler(s *outgoingSettings) error { + return l.framer.fr.WriteSettings(s.ss...) +} + +func (l *loopyWriter) incomingSettingsHandler(s *incomingSettings) error { + if err := l.applySettings(s.ss); err != nil { + return err + } + return l.framer.fr.WriteSettingsAck() +} + +func (l *loopyWriter) registerStreamHandler(h *registerStream) error { + str := &outStream{ + id: h.streamID, + state: empty, + itl: &itemList{}, + wq: h.wq, + } + l.estdStreams[h.streamID] = str + return nil +} + +func (l *loopyWriter) headerHandler(h *headerFrame) error { + if l.side == serverSide { + str, ok := l.estdStreams[h.streamID] + if !ok { + if logger.V(logLevel) { + logger.Warningf("transport: loopy doesn't recognize the stream: %d", h.streamID) + } + return nil + } + // Case 1.A: Server is responding back with headers. + if !h.endStream { + return l.writeHeader(h.streamID, h.endStream, h.hf, h.onWrite) + } + // else: Case 1.B: Server wants to close stream. + + if str.state != empty { // either active or waiting on stream quota. + // add it str's list of items. + str.itl.enqueue(h) + return nil + } + if err := l.writeHeader(h.streamID, h.endStream, h.hf, h.onWrite); err != nil { + return err + } + return l.cleanupStreamHandler(h.cleanup) + } + // Case 2: Client wants to originate stream. + str := &outStream{ + id: h.streamID, + state: empty, + itl: &itemList{}, + wq: h.wq, + } + str.itl.enqueue(h) + return l.originateStream(str) +} + +func (l *loopyWriter) originateStream(str *outStream) error { + hdr := str.itl.dequeue().(*headerFrame) + if err := hdr.initStream(str.id); err != nil { + if err == ErrConnClosing { + return err + } + // Other errors(errStreamDrain) need not close transport. + return nil + } + if err := l.writeHeader(str.id, hdr.endStream, hdr.hf, hdr.onWrite); err != nil { + return err + } + l.estdStreams[str.id] = str + return nil +} + +func (l *loopyWriter) writeHeader(streamID uint32, endStream bool, hf []hpack.HeaderField, onWrite func()) error { + if onWrite != nil { + onWrite() + } + l.hBuf.Reset() + for _, f := range hf { + if err := l.hEnc.WriteField(f); err != nil { + if logger.V(logLevel) { + logger.Warningf("transport: loopyWriter.writeHeader encountered error while encoding headers: %v", err) + } + } + } + var ( + err error + endHeaders, first bool + ) + first = true + for !endHeaders { + size := l.hBuf.Len() + if size > http2MaxFrameLen { + size = http2MaxFrameLen + } else { + endHeaders = true + } + if first { + first = false + err = l.framer.fr.WriteHeaders(http2.HeadersFrameParam{ + StreamID: streamID, + BlockFragment: l.hBuf.Next(size), + EndStream: endStream, + EndHeaders: endHeaders, + }) + } else { + err = l.framer.fr.WriteContinuation( + streamID, + endHeaders, + l.hBuf.Next(size), + ) + } + if err != nil { + return err + } + } + return nil +} + +func (l *loopyWriter) preprocessData(df *dataFrame) error { + str, ok := l.estdStreams[df.streamID] + if !ok { + return nil + } + // If we got data for a stream it means that + // stream was originated and the headers were sent out. + str.itl.enqueue(df) + if str.state == empty { + str.state = active + l.activeStreams.enqueue(str) + } + return nil +} + +func (l *loopyWriter) pingHandler(p *ping) error { + if !p.ack { + l.bdpEst.timesnap(p.data) + } + return l.framer.fr.WritePing(p.ack, p.data) + +} + +func (l *loopyWriter) outFlowControlSizeRequestHandler(o *outFlowControlSizeRequest) error { + o.resp <- l.sendQuota + return nil +} + +func (l *loopyWriter) cleanupStreamHandler(c *cleanupStream) error { + c.onWrite() + if str, ok := l.estdStreams[c.streamID]; ok { + // On the server side it could be a trailers-only response or + // a RST_STREAM before stream initialization thus the stream might + // not be established yet. + delete(l.estdStreams, c.streamID) + str.deleteSelf() + } + if c.rst { // If RST_STREAM needs to be sent. + if err := l.framer.fr.WriteRSTStream(c.streamID, c.rstCode); err != nil { + return err + } + } + if l.side == clientSide && l.draining && len(l.estdStreams) == 0 { + return ErrConnClosing + } + return nil +} + +func (l *loopyWriter) incomingGoAwayHandler(*incomingGoAway) error { + if l.side == clientSide { + l.draining = true + if len(l.estdStreams) == 0 { + return ErrConnClosing + } + } + return nil +} + +func (l *loopyWriter) goAwayHandler(g *goAway) error { + // Handling of outgoing GoAway is very specific to side. + if l.ssGoAwayHandler != nil { + draining, err := l.ssGoAwayHandler(g) + if err != nil { + return err + } + l.draining = draining + } + return nil +} + +func (l *loopyWriter) handle(i interface{}) error { + switch i := i.(type) { + case *incomingWindowUpdate: + return l.incomingWindowUpdateHandler(i) + case *outgoingWindowUpdate: + return l.outgoingWindowUpdateHandler(i) + case *incomingSettings: + return l.incomingSettingsHandler(i) + case *outgoingSettings: + return l.outgoingSettingsHandler(i) + case *headerFrame: + return l.headerHandler(i) + case *registerStream: + return l.registerStreamHandler(i) + case *cleanupStream: + return l.cleanupStreamHandler(i) + case *incomingGoAway: + return l.incomingGoAwayHandler(i) + case *dataFrame: + return l.preprocessData(i) + case *ping: + return l.pingHandler(i) + case *goAway: + return l.goAwayHandler(i) + case *outFlowControlSizeRequest: + return l.outFlowControlSizeRequestHandler(i) + default: + return fmt.Errorf("transport: unknown control message type %T", i) + } +} + +func (l *loopyWriter) applySettings(ss []http2.Setting) error { + for _, s := range ss { + switch s.ID { + case http2.SettingInitialWindowSize: + o := l.oiws + l.oiws = s.Val + if o < l.oiws { + // If the new limit is greater make all depleted streams active. + for _, stream := range l.estdStreams { + if stream.state == waitingOnStreamQuota { + stream.state = active + l.activeStreams.enqueue(stream) + } + } + } + case http2.SettingHeaderTableSize: + updateHeaderTblSize(l.hEnc, s.Val) + } + } + return nil +} + +// processData removes the first stream from active streams, writes out at most 16KB +// of its data and then puts it at the end of activeStreams if there's still more data +// to be sent and stream has some stream-level flow control. +func (l *loopyWriter) processData() (bool, error) { + if l.sendQuota == 0 { + return true, nil + } + str := l.activeStreams.dequeue() // Remove the first stream. + if str == nil { + return true, nil + } + dataItem := str.itl.peek().(*dataFrame) // Peek at the first data item this stream. + // A data item is represented by a dataFrame, since it later translates into + // multiple HTTP2 data frames. + // Every dataFrame has two buffers; h that keeps grpc-message header and d that is acutal data. + // As an optimization to keep wire traffic low, data from d is copied to h to make as big as the + // maximum possilbe HTTP2 frame size. + + if len(dataItem.h) == 0 && len(dataItem.d) == 0 { // Empty data frame + // Client sends out empty data frame with endStream = true + if err := l.framer.fr.WriteData(dataItem.streamID, dataItem.endStream, nil); err != nil { + return false, err + } + str.itl.dequeue() // remove the empty data item from stream + if str.itl.isEmpty() { + str.state = empty + } else if trailer, ok := str.itl.peek().(*headerFrame); ok { // the next item is trailers. + if err := l.writeHeader(trailer.streamID, trailer.endStream, trailer.hf, trailer.onWrite); err != nil { + return false, err + } + if err := l.cleanupStreamHandler(trailer.cleanup); err != nil { + return false, nil + } + } else { + l.activeStreams.enqueue(str) + } + return false, nil + } + var ( + buf []byte + ) + // Figure out the maximum size we can send + maxSize := http2MaxFrameLen + if strQuota := int(l.oiws) - str.bytesOutStanding; strQuota <= 0 { // stream-level flow control. + str.state = waitingOnStreamQuota + return false, nil + } else if maxSize > strQuota { + maxSize = strQuota + } + if maxSize > int(l.sendQuota) { // connection-level flow control. + maxSize = int(l.sendQuota) + } + // Compute how much of the header and data we can send within quota and max frame length + hSize := min(maxSize, len(dataItem.h)) + dSize := min(maxSize-hSize, len(dataItem.d)) + if hSize != 0 { + if dSize == 0 { + buf = dataItem.h + } else { + // We can add some data to grpc message header to distribute bytes more equally across frames. + // Copy on the stack to avoid generating garbage + var localBuf [http2MaxFrameLen]byte + copy(localBuf[:hSize], dataItem.h) + copy(localBuf[hSize:], dataItem.d[:dSize]) + buf = localBuf[:hSize+dSize] + } + } else { + buf = dataItem.d + } + + size := hSize + dSize + + // Now that outgoing flow controls are checked we can replenish str's write quota + str.wq.replenish(size) + var endStream bool + // If this is the last data message on this stream and all of it can be written in this iteration. + if dataItem.endStream && len(dataItem.h)+len(dataItem.d) <= size { + endStream = true + } + if dataItem.onEachWrite != nil { + dataItem.onEachWrite() + } + if err := l.framer.fr.WriteData(dataItem.streamID, endStream, buf[:size]); err != nil { + return false, err + } + str.bytesOutStanding += size + l.sendQuota -= uint32(size) + dataItem.h = dataItem.h[hSize:] + dataItem.d = dataItem.d[dSize:] + + if len(dataItem.h) == 0 && len(dataItem.d) == 0 { // All the data from that message was written out. + str.itl.dequeue() + } + if str.itl.isEmpty() { + str.state = empty + } else if trailer, ok := str.itl.peek().(*headerFrame); ok { // The next item is trailers. + if err := l.writeHeader(trailer.streamID, trailer.endStream, trailer.hf, trailer.onWrite); err != nil { + return false, err + } + if err := l.cleanupStreamHandler(trailer.cleanup); err != nil { + return false, err + } + } else if int(l.oiws)-str.bytesOutStanding <= 0 { // Ran out of stream quota. + str.state = waitingOnStreamQuota + } else { // Otherwise add it back to the list of active streams. + l.activeStreams.enqueue(str) + } + return false, nil +} + +func min(a, b int) int { + if a < b { + return a + } + return b +} diff --git a/vendor/google.golang.org/grpc/internal/transport/defaults.go b/vendor/google.golang.org/grpc/internal/transport/defaults.go new file mode 100644 index 000000000..9fa306b2e --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/transport/defaults.go @@ -0,0 +1,49 @@ +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package transport + +import ( + "math" + "time" +) + +const ( + // The default value of flow control window size in HTTP2 spec. + defaultWindowSize = 65535 + // The initial window size for flow control. + initialWindowSize = defaultWindowSize // for an RPC + infinity = time.Duration(math.MaxInt64) + defaultClientKeepaliveTime = infinity + defaultClientKeepaliveTimeout = 20 * time.Second + defaultMaxStreamsClient = 100 + defaultMaxConnectionIdle = infinity + defaultMaxConnectionAge = infinity + defaultMaxConnectionAgeGrace = infinity + defaultServerKeepaliveTime = 2 * time.Hour + defaultServerKeepaliveTimeout = 20 * time.Second + defaultKeepalivePolicyMinTime = 5 * time.Minute + // max window limit set by HTTP2 Specs. + maxWindowSize = math.MaxInt32 + // defaultWriteQuota is the default value for number of data + // bytes that each stream can schedule before some of it being + // flushed out. + defaultWriteQuota = 64 * 1024 + defaultClientMaxHeaderListSize = uint32(16 << 20) + defaultServerMaxHeaderListSize = uint32(16 << 20) +) diff --git a/vendor/google.golang.org/grpc/internal/transport/flowcontrol.go b/vendor/google.golang.org/grpc/internal/transport/flowcontrol.go new file mode 100644 index 000000000..f262edd8e --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/transport/flowcontrol.go @@ -0,0 +1,217 @@ +/* + * + * Copyright 2014 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package transport + +import ( + "fmt" + "math" + "sync" + "sync/atomic" +) + +// writeQuota is a soft limit on the amount of data a stream can +// schedule before some of it is written out. +type writeQuota struct { + quota int32 + // get waits on read from when quota goes less than or equal to zero. + // replenish writes on it when quota goes positive again. + ch chan struct{} + // done is triggered in error case. + done <-chan struct{} + // replenish is called by loopyWriter to give quota back to. + // It is implemented as a field so that it can be updated + // by tests. + replenish func(n int) +} + +func newWriteQuota(sz int32, done <-chan struct{}) *writeQuota { + w := &writeQuota{ + quota: sz, + ch: make(chan struct{}, 1), + done: done, + } + w.replenish = w.realReplenish + return w +} + +func (w *writeQuota) get(sz int32) error { + for { + if atomic.LoadInt32(&w.quota) > 0 { + atomic.AddInt32(&w.quota, -sz) + return nil + } + select { + case <-w.ch: + continue + case <-w.done: + return errStreamDone + } + } +} + +func (w *writeQuota) realReplenish(n int) { + sz := int32(n) + a := atomic.AddInt32(&w.quota, sz) + b := a - sz + if b <= 0 && a > 0 { + select { + case w.ch <- struct{}{}: + default: + } + } +} + +type trInFlow struct { + limit uint32 + unacked uint32 + effectiveWindowSize uint32 +} + +func (f *trInFlow) newLimit(n uint32) uint32 { + d := n - f.limit + f.limit = n + f.updateEffectiveWindowSize() + return d +} + +func (f *trInFlow) onData(n uint32) uint32 { + f.unacked += n + if f.unacked >= f.limit/4 { + w := f.unacked + f.unacked = 0 + f.updateEffectiveWindowSize() + return w + } + f.updateEffectiveWindowSize() + return 0 +} + +func (f *trInFlow) reset() uint32 { + w := f.unacked + f.unacked = 0 + f.updateEffectiveWindowSize() + return w +} + +func (f *trInFlow) updateEffectiveWindowSize() { + atomic.StoreUint32(&f.effectiveWindowSize, f.limit-f.unacked) +} + +func (f *trInFlow) getSize() uint32 { + return atomic.LoadUint32(&f.effectiveWindowSize) +} + +// TODO(mmukhi): Simplify this code. +// inFlow deals with inbound flow control +type inFlow struct { + mu sync.Mutex + // The inbound flow control limit for pending data. + limit uint32 + // pendingData is the overall data which have been received but not been + // consumed by applications. + pendingData uint32 + // The amount of data the application has consumed but grpc has not sent + // window update for them. Used to reduce window update frequency. + pendingUpdate uint32 + // delta is the extra window update given by receiver when an application + // is reading data bigger in size than the inFlow limit. + delta uint32 +} + +// newLimit updates the inflow window to a new value n. +// It assumes that n is always greater than the old limit. +func (f *inFlow) newLimit(n uint32) uint32 { + f.mu.Lock() + d := n - f.limit + f.limit = n + f.mu.Unlock() + return d +} + +func (f *inFlow) maybeAdjust(n uint32) uint32 { + if n > uint32(math.MaxInt32) { + n = uint32(math.MaxInt32) + } + f.mu.Lock() + defer f.mu.Unlock() + // estSenderQuota is the receiver's view of the maximum number of bytes the sender + // can send without a window update. + estSenderQuota := int32(f.limit - (f.pendingData + f.pendingUpdate)) + // estUntransmittedData is the maximum number of bytes the sends might not have put + // on the wire yet. A value of 0 or less means that we have already received all or + // more bytes than the application is requesting to read. + estUntransmittedData := int32(n - f.pendingData) // Casting into int32 since it could be negative. + // This implies that unless we send a window update, the sender won't be able to send all the bytes + // for this message. Therefore we must send an update over the limit since there's an active read + // request from the application. + if estUntransmittedData > estSenderQuota { + // Sender's window shouldn't go more than 2^31 - 1 as specified in the HTTP spec. + if f.limit+n > maxWindowSize { + f.delta = maxWindowSize - f.limit + } else { + // Send a window update for the whole message and not just the difference between + // estUntransmittedData and estSenderQuota. This will be helpful in case the message + // is padded; We will fallback on the current available window(at least a 1/4th of the limit). + f.delta = n + } + return f.delta + } + return 0 +} + +// onData is invoked when some data frame is received. It updates pendingData. +func (f *inFlow) onData(n uint32) error { + f.mu.Lock() + f.pendingData += n + if f.pendingData+f.pendingUpdate > f.limit+f.delta { + limit := f.limit + rcvd := f.pendingData + f.pendingUpdate + f.mu.Unlock() + return fmt.Errorf("received %d-bytes data exceeding the limit %d bytes", rcvd, limit) + } + f.mu.Unlock() + return nil +} + +// onRead is invoked when the application reads the data. It returns the window size +// to be sent to the peer. +func (f *inFlow) onRead(n uint32) uint32 { + f.mu.Lock() + if f.pendingData == 0 { + f.mu.Unlock() + return 0 + } + f.pendingData -= n + if n > f.delta { + n -= f.delta + f.delta = 0 + } else { + f.delta -= n + n = 0 + } + f.pendingUpdate += n + if f.pendingUpdate >= f.limit/4 { + wu := f.pendingUpdate + f.pendingUpdate = 0 + f.mu.Unlock() + return wu + } + f.mu.Unlock() + return 0 +} diff --git a/vendor/google.golang.org/grpc/internal/transport/handler_server.go b/vendor/google.golang.org/grpc/internal/transport/handler_server.go new file mode 100644 index 000000000..05d3871e6 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/transport/handler_server.go @@ -0,0 +1,463 @@ +/* + * + * Copyright 2016 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// This file is the implementation of a gRPC server using HTTP/2 which +// uses the standard Go http2 Server implementation (via the +// http.Handler interface), rather than speaking low-level HTTP/2 +// frames itself. It is the implementation of *grpc.Server.ServeHTTP. + +package transport + +import ( + "bytes" + "context" + "errors" + "fmt" + "io" + "net" + "net/http" + "strings" + "sync" + "time" + + "github.com/golang/protobuf/proto" + "golang.org/x/net/http2" + "google.golang.org/grpc/codes" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/internal/grpcutil" + "google.golang.org/grpc/metadata" + "google.golang.org/grpc/peer" + "google.golang.org/grpc/stats" + "google.golang.org/grpc/status" +) + +// NewServerHandlerTransport returns a ServerTransport handling gRPC +// from inside an http.Handler. It requires that the http Server +// supports HTTP/2. +func NewServerHandlerTransport(w http.ResponseWriter, r *http.Request, stats stats.Handler) (ServerTransport, error) { + if r.ProtoMajor != 2 { + return nil, errors.New("gRPC requires HTTP/2") + } + if r.Method != "POST" { + return nil, errors.New("invalid gRPC request method") + } + contentType := r.Header.Get("Content-Type") + // TODO: do we assume contentType is lowercase? we did before + contentSubtype, validContentType := grpcutil.ContentSubtype(contentType) + if !validContentType { + return nil, errors.New("invalid gRPC request content-type") + } + if _, ok := w.(http.Flusher); !ok { + return nil, errors.New("gRPC requires a ResponseWriter supporting http.Flusher") + } + + st := &serverHandlerTransport{ + rw: w, + req: r, + closedCh: make(chan struct{}), + writes: make(chan func()), + contentType: contentType, + contentSubtype: contentSubtype, + stats: stats, + } + + if v := r.Header.Get("grpc-timeout"); v != "" { + to, err := decodeTimeout(v) + if err != nil { + return nil, status.Errorf(codes.Internal, "malformed time-out: %v", err) + } + st.timeoutSet = true + st.timeout = to + } + + metakv := []string{"content-type", contentType} + if r.Host != "" { + metakv = append(metakv, ":authority", r.Host) + } + for k, vv := range r.Header { + k = strings.ToLower(k) + if isReservedHeader(k) && !isWhitelistedHeader(k) { + continue + } + for _, v := range vv { + v, err := decodeMetadataHeader(k, v) + if err != nil { + return nil, status.Errorf(codes.Internal, "malformed binary metadata: %v", err) + } + metakv = append(metakv, k, v) + } + } + st.headerMD = metadata.Pairs(metakv...) + + return st, nil +} + +// serverHandlerTransport is an implementation of ServerTransport +// which replies to exactly one gRPC request (exactly one HTTP request), +// using the net/http.Handler interface. This http.Handler is guaranteed +// at this point to be speaking over HTTP/2, so it's able to speak valid +// gRPC. +type serverHandlerTransport struct { + rw http.ResponseWriter + req *http.Request + timeoutSet bool + timeout time.Duration + + headerMD metadata.MD + + closeOnce sync.Once + closedCh chan struct{} // closed on Close + + // writes is a channel of code to run serialized in the + // ServeHTTP (HandleStreams) goroutine. The channel is closed + // when WriteStatus is called. + writes chan func() + + // block concurrent WriteStatus calls + // e.g. grpc/(*serverStream).SendMsg/RecvMsg + writeStatusMu sync.Mutex + + // we just mirror the request content-type + contentType string + // we store both contentType and contentSubtype so we don't keep recreating them + // TODO make sure this is consistent across handler_server and http2_server + contentSubtype string + + stats stats.Handler +} + +func (ht *serverHandlerTransport) Close() error { + ht.closeOnce.Do(ht.closeCloseChanOnce) + return nil +} + +func (ht *serverHandlerTransport) closeCloseChanOnce() { close(ht.closedCh) } + +func (ht *serverHandlerTransport) RemoteAddr() net.Addr { return strAddr(ht.req.RemoteAddr) } + +// strAddr is a net.Addr backed by either a TCP "ip:port" string, or +// the empty string if unknown. +type strAddr string + +func (a strAddr) Network() string { + if a != "" { + // Per the documentation on net/http.Request.RemoteAddr, if this is + // set, it's set to the IP:port of the peer (hence, TCP): + // https://golang.org/pkg/net/http/#Request + // + // If we want to support Unix sockets later, we can + // add our own grpc-specific convention within the + // grpc codebase to set RemoteAddr to a different + // format, or probably better: we can attach it to the + // context and use that from serverHandlerTransport.RemoteAddr. + return "tcp" + } + return "" +} + +func (a strAddr) String() string { return string(a) } + +// do runs fn in the ServeHTTP goroutine. +func (ht *serverHandlerTransport) do(fn func()) error { + select { + case <-ht.closedCh: + return ErrConnClosing + case ht.writes <- fn: + return nil + } +} + +func (ht *serverHandlerTransport) WriteStatus(s *Stream, st *status.Status) error { + ht.writeStatusMu.Lock() + defer ht.writeStatusMu.Unlock() + + headersWritten := s.updateHeaderSent() + err := ht.do(func() { + if !headersWritten { + ht.writePendingHeaders(s) + } + + // And flush, in case no header or body has been sent yet. + // This forces a separation of headers and trailers if this is the + // first call (for example, in end2end tests's TestNoService). + ht.rw.(http.Flusher).Flush() + + h := ht.rw.Header() + h.Set("Grpc-Status", fmt.Sprintf("%d", st.Code())) + if m := st.Message(); m != "" { + h.Set("Grpc-Message", encodeGrpcMessage(m)) + } + + if p := st.Proto(); p != nil && len(p.Details) > 0 { + stBytes, err := proto.Marshal(p) + if err != nil { + // TODO: return error instead, when callers are able to handle it. + panic(err) + } + + h.Set("Grpc-Status-Details-Bin", encodeBinHeader(stBytes)) + } + + if md := s.Trailer(); len(md) > 0 { + for k, vv := range md { + // Clients don't tolerate reading restricted headers after some non restricted ones were sent. + if isReservedHeader(k) { + continue + } + for _, v := range vv { + // http2 ResponseWriter mechanism to send undeclared Trailers after + // the headers have possibly been written. + h.Add(http2.TrailerPrefix+k, encodeMetadataHeader(k, v)) + } + } + } + }) + + if err == nil { // transport has not been closed + if ht.stats != nil { + // Note: The trailer fields are compressed with hpack after this call returns. + // No WireLength field is set here. + ht.stats.HandleRPC(s.Context(), &stats.OutTrailer{ + Trailer: s.trailer.Copy(), + }) + } + } + ht.Close() + return err +} + +// writePendingHeaders sets common and custom headers on the first +// write call (Write, WriteHeader, or WriteStatus) +func (ht *serverHandlerTransport) writePendingHeaders(s *Stream) { + ht.writeCommonHeaders(s) + ht.writeCustomHeaders(s) +} + +// writeCommonHeaders sets common headers on the first write +// call (Write, WriteHeader, or WriteStatus). +func (ht *serverHandlerTransport) writeCommonHeaders(s *Stream) { + h := ht.rw.Header() + h["Date"] = nil // suppress Date to make tests happy; TODO: restore + h.Set("Content-Type", ht.contentType) + + // Predeclare trailers we'll set later in WriteStatus (after the body). + // This is a SHOULD in the HTTP RFC, and the way you add (known) + // Trailers per the net/http.ResponseWriter contract. + // See https://golang.org/pkg/net/http/#ResponseWriter + // and https://golang.org/pkg/net/http/#example_ResponseWriter_trailers + h.Add("Trailer", "Grpc-Status") + h.Add("Trailer", "Grpc-Message") + h.Add("Trailer", "Grpc-Status-Details-Bin") + + if s.sendCompress != "" { + h.Set("Grpc-Encoding", s.sendCompress) + } +} + +// writeCustomHeaders sets custom headers set on the stream via SetHeader +// on the first write call (Write, WriteHeader, or WriteStatus). +func (ht *serverHandlerTransport) writeCustomHeaders(s *Stream) { + h := ht.rw.Header() + + s.hdrMu.Lock() + for k, vv := range s.header { + if isReservedHeader(k) { + continue + } + for _, v := range vv { + h.Add(k, encodeMetadataHeader(k, v)) + } + } + + s.hdrMu.Unlock() +} + +func (ht *serverHandlerTransport) Write(s *Stream, hdr []byte, data []byte, opts *Options) error { + headersWritten := s.updateHeaderSent() + return ht.do(func() { + if !headersWritten { + ht.writePendingHeaders(s) + } + ht.rw.Write(hdr) + ht.rw.Write(data) + ht.rw.(http.Flusher).Flush() + }) +} + +func (ht *serverHandlerTransport) WriteHeader(s *Stream, md metadata.MD) error { + if err := s.SetHeader(md); err != nil { + return err + } + + headersWritten := s.updateHeaderSent() + err := ht.do(func() { + if !headersWritten { + ht.writePendingHeaders(s) + } + + ht.rw.WriteHeader(200) + ht.rw.(http.Flusher).Flush() + }) + + if err == nil { + if ht.stats != nil { + // Note: The header fields are compressed with hpack after this call returns. + // No WireLength field is set here. + ht.stats.HandleRPC(s.Context(), &stats.OutHeader{ + Header: md.Copy(), + Compression: s.sendCompress, + }) + } + } + return err +} + +func (ht *serverHandlerTransport) HandleStreams(startStream func(*Stream), traceCtx func(context.Context, string) context.Context) { + // With this transport type there will be exactly 1 stream: this HTTP request. + + ctx := ht.req.Context() + var cancel context.CancelFunc + if ht.timeoutSet { + ctx, cancel = context.WithTimeout(ctx, ht.timeout) + } else { + ctx, cancel = context.WithCancel(ctx) + } + + // requestOver is closed when the status has been written via WriteStatus. + requestOver := make(chan struct{}) + go func() { + select { + case <-requestOver: + case <-ht.closedCh: + case <-ht.req.Context().Done(): + } + cancel() + ht.Close() + }() + + req := ht.req + + s := &Stream{ + id: 0, // irrelevant + requestRead: func(int) {}, + cancel: cancel, + buf: newRecvBuffer(), + st: ht, + method: req.URL.Path, + recvCompress: req.Header.Get("grpc-encoding"), + contentSubtype: ht.contentSubtype, + } + pr := &peer.Peer{ + Addr: ht.RemoteAddr(), + } + if req.TLS != nil { + pr.AuthInfo = credentials.TLSInfo{State: *req.TLS, CommonAuthInfo: credentials.CommonAuthInfo{SecurityLevel: credentials.PrivacyAndIntegrity}} + } + ctx = metadata.NewIncomingContext(ctx, ht.headerMD) + s.ctx = peer.NewContext(ctx, pr) + if ht.stats != nil { + s.ctx = ht.stats.TagRPC(s.ctx, &stats.RPCTagInfo{FullMethodName: s.method}) + inHeader := &stats.InHeader{ + FullMethod: s.method, + RemoteAddr: ht.RemoteAddr(), + Compression: s.recvCompress, + } + ht.stats.HandleRPC(s.ctx, inHeader) + } + s.trReader = &transportReader{ + reader: &recvBufferReader{ctx: s.ctx, ctxDone: s.ctx.Done(), recv: s.buf, freeBuffer: func(*bytes.Buffer) {}}, + windowHandler: func(int) {}, + } + + // readerDone is closed when the Body.Read-ing goroutine exits. + readerDone := make(chan struct{}) + go func() { + defer close(readerDone) + + // TODO: minimize garbage, optimize recvBuffer code/ownership + const readSize = 8196 + for buf := make([]byte, readSize); ; { + n, err := req.Body.Read(buf) + if n > 0 { + s.buf.put(recvMsg{buffer: bytes.NewBuffer(buf[:n:n])}) + buf = buf[n:] + } + if err != nil { + s.buf.put(recvMsg{err: mapRecvMsgError(err)}) + return + } + if len(buf) == 0 { + buf = make([]byte, readSize) + } + } + }() + + // startStream is provided by the *grpc.Server's serveStreams. + // It starts a goroutine serving s and exits immediately. + // The goroutine that is started is the one that then calls + // into ht, calling WriteHeader, Write, WriteStatus, Close, etc. + startStream(s) + + ht.runStream() + close(requestOver) + + // Wait for reading goroutine to finish. + req.Body.Close() + <-readerDone +} + +func (ht *serverHandlerTransport) runStream() { + for { + select { + case fn := <-ht.writes: + fn() + case <-ht.closedCh: + return + } + } +} + +func (ht *serverHandlerTransport) IncrMsgSent() {} + +func (ht *serverHandlerTransport) IncrMsgRecv() {} + +func (ht *serverHandlerTransport) Drain() { + panic("Drain() is not implemented") +} + +// mapRecvMsgError returns the non-nil err into the appropriate +// error value as expected by callers of *grpc.parser.recvMsg. +// In particular, in can only be: +// * io.EOF +// * io.ErrUnexpectedEOF +// * of type transport.ConnectionError +// * an error from the status package +func mapRecvMsgError(err error) error { + if err == io.EOF || err == io.ErrUnexpectedEOF { + return err + } + if se, ok := err.(http2.StreamError); ok { + if code, ok := http2ErrConvTab[se.Code]; ok { + return status.Error(code, se.Error()) + } + } + if strings.Contains(err.Error(), "body closed by handler") { + return status.Error(codes.Canceled, err.Error()) + } + return connectionErrorf(true, err, err.Error()) +} diff --git a/vendor/google.golang.org/grpc/internal/transport/http2_client.go b/vendor/google.golang.org/grpc/internal/transport/http2_client.go new file mode 100644 index 000000000..e73b77a15 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/transport/http2_client.go @@ -0,0 +1,1491 @@ +/* + * + * Copyright 2014 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package transport + +import ( + "context" + "fmt" + "io" + "math" + "net" + "strconv" + "strings" + "sync" + "sync/atomic" + "time" + + "golang.org/x/net/http2" + "golang.org/x/net/http2/hpack" + "google.golang.org/grpc/internal/grpcutil" + + "google.golang.org/grpc/codes" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/internal" + "google.golang.org/grpc/internal/channelz" + "google.golang.org/grpc/internal/syscall" + "google.golang.org/grpc/keepalive" + "google.golang.org/grpc/metadata" + "google.golang.org/grpc/peer" + "google.golang.org/grpc/resolver" + "google.golang.org/grpc/stats" + "google.golang.org/grpc/status" +) + +// clientConnectionCounter counts the number of connections a client has +// initiated (equal to the number of http2Clients created). Must be accessed +// atomically. +var clientConnectionCounter uint64 + +// http2Client implements the ClientTransport interface with HTTP2. +type http2Client struct { + lastRead int64 // Keep this field 64-bit aligned. Accessed atomically. + ctx context.Context + cancel context.CancelFunc + ctxDone <-chan struct{} // Cache the ctx.Done() chan. + userAgent string + md interface{} + conn net.Conn // underlying communication channel + loopy *loopyWriter + remoteAddr net.Addr + localAddr net.Addr + authInfo credentials.AuthInfo // auth info about the connection + + readerDone chan struct{} // sync point to enable testing. + writerDone chan struct{} // sync point to enable testing. + // goAway is closed to notify the upper layer (i.e., addrConn.transportMonitor) + // that the server sent GoAway on this transport. + goAway chan struct{} + + framer *framer + // controlBuf delivers all the control related tasks (e.g., window + // updates, reset streams, and various settings) to the controller. + controlBuf *controlBuffer + fc *trInFlow + // The scheme used: https if TLS is on, http otherwise. + scheme string + + isSecure bool + + perRPCCreds []credentials.PerRPCCredentials + + kp keepalive.ClientParameters + keepaliveEnabled bool + + statsHandler stats.Handler + + initialWindowSize int32 + + // configured by peer through SETTINGS_MAX_HEADER_LIST_SIZE + maxSendHeaderListSize *uint32 + + bdpEst *bdpEstimator + // onPrefaceReceipt is a callback that client transport calls upon + // receiving server preface to signal that a succefull HTTP2 + // connection was established. + onPrefaceReceipt func() + + maxConcurrentStreams uint32 + streamQuota int64 + streamsQuotaAvailable chan struct{} + waitingStreams uint32 + nextID uint32 + + mu sync.Mutex // guard the following variables + state transportState + activeStreams map[uint32]*Stream + // prevGoAway ID records the Last-Stream-ID in the previous GOAway frame. + prevGoAwayID uint32 + // goAwayReason records the http2.ErrCode and debug data received with the + // GoAway frame. + goAwayReason GoAwayReason + // A condition variable used to signal when the keepalive goroutine should + // go dormant. The condition for dormancy is based on the number of active + // streams and the `PermitWithoutStream` keepalive client parameter. And + // since the number of active streams is guarded by the above mutex, we use + // the same for this condition variable as well. + kpDormancyCond *sync.Cond + // A boolean to track whether the keepalive goroutine is dormant or not. + // This is checked before attempting to signal the above condition + // variable. + kpDormant bool + + // Fields below are for channelz metric collection. + channelzID int64 // channelz unique identification number + czData *channelzData + + onGoAway func(GoAwayReason) + onClose func() + + bufferPool *bufferPool + + connectionID uint64 +} + +func dial(ctx context.Context, fn func(context.Context, string) (net.Conn, error), addr string) (net.Conn, error) { + if fn != nil { + return fn(ctx, addr) + } + return (&net.Dialer{}).DialContext(ctx, "tcp", addr) +} + +func isTemporary(err error) bool { + switch err := err.(type) { + case interface { + Temporary() bool + }: + return err.Temporary() + case interface { + Timeout() bool + }: + // Timeouts may be resolved upon retry, and are thus treated as + // temporary. + return err.Timeout() + } + return true +} + +// newHTTP2Client constructs a connected ClientTransport to addr based on HTTP2 +// and starts to receive messages on it. Non-nil error returns if construction +// fails. +func newHTTP2Client(connectCtx, ctx context.Context, addr resolver.Address, opts ConnectOptions, onPrefaceReceipt func(), onGoAway func(GoAwayReason), onClose func()) (_ *http2Client, err error) { + scheme := "http" + ctx, cancel := context.WithCancel(ctx) + defer func() { + if err != nil { + cancel() + } + }() + + conn, err := dial(connectCtx, opts.Dialer, addr.Addr) + if err != nil { + if opts.FailOnNonTempDialError { + return nil, connectionErrorf(isTemporary(err), err, "transport: error while dialing: %v", err) + } + return nil, connectionErrorf(true, err, "transport: Error while dialing %v", err) + } + // Any further errors will close the underlying connection + defer func(conn net.Conn) { + if err != nil { + conn.Close() + } + }(conn) + kp := opts.KeepaliveParams + // Validate keepalive parameters. + if kp.Time == 0 { + kp.Time = defaultClientKeepaliveTime + } + if kp.Timeout == 0 { + kp.Timeout = defaultClientKeepaliveTimeout + } + keepaliveEnabled := false + if kp.Time != infinity { + if err = syscall.SetTCPUserTimeout(conn, kp.Timeout); err != nil { + return nil, connectionErrorf(false, err, "transport: failed to set TCP_USER_TIMEOUT: %v", err) + } + keepaliveEnabled = true + } + var ( + isSecure bool + authInfo credentials.AuthInfo + ) + transportCreds := opts.TransportCredentials + perRPCCreds := opts.PerRPCCredentials + + if b := opts.CredsBundle; b != nil { + if t := b.TransportCredentials(); t != nil { + transportCreds = t + } + if t := b.PerRPCCredentials(); t != nil { + perRPCCreds = append(perRPCCreds, t) + } + } + if transportCreds != nil { + // gRPC, resolver, balancer etc. can specify arbitrary data in the + // Attributes field of resolver.Address, which is shoved into connectCtx + // and passed to the credential handshaker. This makes it possible for + // address specific arbitrary data to reach the credential handshaker. + contextWithHandshakeInfo := internal.NewClientHandshakeInfoContext.(func(context.Context, credentials.ClientHandshakeInfo) context.Context) + connectCtx = contextWithHandshakeInfo(connectCtx, credentials.ClientHandshakeInfo{Attributes: addr.Attributes}) + conn, authInfo, err = transportCreds.ClientHandshake(connectCtx, addr.ServerName, conn) + if err != nil { + return nil, connectionErrorf(isTemporary(err), err, "transport: authentication handshake failed: %v", err) + } + isSecure = true + if transportCreds.Info().SecurityProtocol == "tls" { + scheme = "https" + } + } + dynamicWindow := true + icwz := int32(initialWindowSize) + if opts.InitialConnWindowSize >= defaultWindowSize { + icwz = opts.InitialConnWindowSize + dynamicWindow = false + } + writeBufSize := opts.WriteBufferSize + readBufSize := opts.ReadBufferSize + maxHeaderListSize := defaultClientMaxHeaderListSize + if opts.MaxHeaderListSize != nil { + maxHeaderListSize = *opts.MaxHeaderListSize + } + t := &http2Client{ + ctx: ctx, + ctxDone: ctx.Done(), // Cache Done chan. + cancel: cancel, + userAgent: opts.UserAgent, + md: addr.Metadata, + conn: conn, + remoteAddr: conn.RemoteAddr(), + localAddr: conn.LocalAddr(), + authInfo: authInfo, + readerDone: make(chan struct{}), + writerDone: make(chan struct{}), + goAway: make(chan struct{}), + framer: newFramer(conn, writeBufSize, readBufSize, maxHeaderListSize), + fc: &trInFlow{limit: uint32(icwz)}, + scheme: scheme, + activeStreams: make(map[uint32]*Stream), + isSecure: isSecure, + perRPCCreds: perRPCCreds, + kp: kp, + statsHandler: opts.StatsHandler, + initialWindowSize: initialWindowSize, + onPrefaceReceipt: onPrefaceReceipt, + nextID: 1, + maxConcurrentStreams: defaultMaxStreamsClient, + streamQuota: defaultMaxStreamsClient, + streamsQuotaAvailable: make(chan struct{}, 1), + czData: new(channelzData), + onGoAway: onGoAway, + onClose: onClose, + keepaliveEnabled: keepaliveEnabled, + bufferPool: newBufferPool(), + } + t.controlBuf = newControlBuffer(t.ctxDone) + if opts.InitialWindowSize >= defaultWindowSize { + t.initialWindowSize = opts.InitialWindowSize + dynamicWindow = false + } + if dynamicWindow { + t.bdpEst = &bdpEstimator{ + bdp: initialWindowSize, + updateFlowControl: t.updateFlowControl, + } + } + if t.statsHandler != nil { + t.ctx = t.statsHandler.TagConn(t.ctx, &stats.ConnTagInfo{ + RemoteAddr: t.remoteAddr, + LocalAddr: t.localAddr, + }) + connBegin := &stats.ConnBegin{ + Client: true, + } + t.statsHandler.HandleConn(t.ctx, connBegin) + } + if channelz.IsOn() { + t.channelzID = channelz.RegisterNormalSocket(t, opts.ChannelzParentID, fmt.Sprintf("%s -> %s", t.localAddr, t.remoteAddr)) + } + if t.keepaliveEnabled { + t.kpDormancyCond = sync.NewCond(&t.mu) + go t.keepalive() + } + // Start the reader goroutine for incoming message. Each transport has + // a dedicated goroutine which reads HTTP2 frame from network. Then it + // dispatches the frame to the corresponding stream entity. + go t.reader() + + // Send connection preface to server. + n, err := t.conn.Write(clientPreface) + if err != nil { + t.Close() + return nil, connectionErrorf(true, err, "transport: failed to write client preface: %v", err) + } + if n != len(clientPreface) { + t.Close() + return nil, connectionErrorf(true, err, "transport: preface mismatch, wrote %d bytes; want %d", n, len(clientPreface)) + } + var ss []http2.Setting + + if t.initialWindowSize != defaultWindowSize { + ss = append(ss, http2.Setting{ + ID: http2.SettingInitialWindowSize, + Val: uint32(t.initialWindowSize), + }) + } + if opts.MaxHeaderListSize != nil { + ss = append(ss, http2.Setting{ + ID: http2.SettingMaxHeaderListSize, + Val: *opts.MaxHeaderListSize, + }) + } + err = t.framer.fr.WriteSettings(ss...) + if err != nil { + t.Close() + return nil, connectionErrorf(true, err, "transport: failed to write initial settings frame: %v", err) + } + // Adjust the connection flow control window if needed. + if delta := uint32(icwz - defaultWindowSize); delta > 0 { + if err := t.framer.fr.WriteWindowUpdate(0, delta); err != nil { + t.Close() + return nil, connectionErrorf(true, err, "transport: failed to write window update: %v", err) + } + } + + t.connectionID = atomic.AddUint64(&clientConnectionCounter, 1) + + if err := t.framer.writer.Flush(); err != nil { + return nil, err + } + go func() { + t.loopy = newLoopyWriter(clientSide, t.framer, t.controlBuf, t.bdpEst) + err := t.loopy.run() + if err != nil { + if logger.V(logLevel) { + logger.Errorf("transport: loopyWriter.run returning. Err: %v", err) + } + } + // If it's a connection error, let reader goroutine handle it + // since there might be data in the buffers. + if _, ok := err.(net.Error); !ok { + t.conn.Close() + } + close(t.writerDone) + }() + return t, nil +} + +func (t *http2Client) newStream(ctx context.Context, callHdr *CallHdr) *Stream { + // TODO(zhaoq): Handle uint32 overflow of Stream.id. + s := &Stream{ + ct: t, + done: make(chan struct{}), + method: callHdr.Method, + sendCompress: callHdr.SendCompress, + buf: newRecvBuffer(), + headerChan: make(chan struct{}), + contentSubtype: callHdr.ContentSubtype, + } + s.wq = newWriteQuota(defaultWriteQuota, s.done) + s.requestRead = func(n int) { + t.adjustWindow(s, uint32(n)) + } + // The client side stream context should have exactly the same life cycle with the user provided context. + // That means, s.ctx should be read-only. And s.ctx is done iff ctx is done. + // So we use the original context here instead of creating a copy. + s.ctx = ctx + s.trReader = &transportReader{ + reader: &recvBufferReader{ + ctx: s.ctx, + ctxDone: s.ctx.Done(), + recv: s.buf, + closeStream: func(err error) { + t.CloseStream(s, err) + }, + freeBuffer: t.bufferPool.put, + }, + windowHandler: func(n int) { + t.updateWindow(s, uint32(n)) + }, + } + return s +} + +func (t *http2Client) getPeer() *peer.Peer { + return &peer.Peer{ + Addr: t.remoteAddr, + AuthInfo: t.authInfo, + } +} + +func (t *http2Client) createHeaderFields(ctx context.Context, callHdr *CallHdr) ([]hpack.HeaderField, error) { + aud := t.createAudience(callHdr) + ri := credentials.RequestInfo{ + Method: callHdr.Method, + AuthInfo: t.authInfo, + } + ctxWithRequestInfo := internal.NewRequestInfoContext.(func(context.Context, credentials.RequestInfo) context.Context)(ctx, ri) + authData, err := t.getTrAuthData(ctxWithRequestInfo, aud) + if err != nil { + return nil, err + } + callAuthData, err := t.getCallAuthData(ctxWithRequestInfo, aud, callHdr) + if err != nil { + return nil, err + } + // TODO(mmukhi): Benchmark if the performance gets better if count the metadata and other header fields + // first and create a slice of that exact size. + // Make the slice of certain predictable size to reduce allocations made by append. + hfLen := 7 // :method, :scheme, :path, :authority, content-type, user-agent, te + hfLen += len(authData) + len(callAuthData) + headerFields := make([]hpack.HeaderField, 0, hfLen) + headerFields = append(headerFields, hpack.HeaderField{Name: ":method", Value: "POST"}) + headerFields = append(headerFields, hpack.HeaderField{Name: ":scheme", Value: t.scheme}) + headerFields = append(headerFields, hpack.HeaderField{Name: ":path", Value: callHdr.Method}) + headerFields = append(headerFields, hpack.HeaderField{Name: ":authority", Value: callHdr.Host}) + headerFields = append(headerFields, hpack.HeaderField{Name: "content-type", Value: grpcutil.ContentType(callHdr.ContentSubtype)}) + headerFields = append(headerFields, hpack.HeaderField{Name: "user-agent", Value: t.userAgent}) + headerFields = append(headerFields, hpack.HeaderField{Name: "te", Value: "trailers"}) + if callHdr.PreviousAttempts > 0 { + headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-previous-rpc-attempts", Value: strconv.Itoa(callHdr.PreviousAttempts)}) + } + + if callHdr.SendCompress != "" { + headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-encoding", Value: callHdr.SendCompress}) + headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-accept-encoding", Value: callHdr.SendCompress}) + } + if dl, ok := ctx.Deadline(); ok { + // Send out timeout regardless its value. The server can detect timeout context by itself. + // TODO(mmukhi): Perhaps this field should be updated when actually writing out to the wire. + timeout := time.Until(dl) + headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-timeout", Value: grpcutil.EncodeDuration(timeout)}) + } + for k, v := range authData { + headerFields = append(headerFields, hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)}) + } + for k, v := range callAuthData { + headerFields = append(headerFields, hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)}) + } + if b := stats.OutgoingTags(ctx); b != nil { + headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-tags-bin", Value: encodeBinHeader(b)}) + } + if b := stats.OutgoingTrace(ctx); b != nil { + headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-trace-bin", Value: encodeBinHeader(b)}) + } + + if md, added, ok := metadata.FromOutgoingContextRaw(ctx); ok { + var k string + for k, vv := range md { + // HTTP doesn't allow you to set pseudoheaders after non pseudoheaders were set. + if isReservedHeader(k) { + continue + } + for _, v := range vv { + headerFields = append(headerFields, hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)}) + } + } + for _, vv := range added { + for i, v := range vv { + if i%2 == 0 { + k = v + continue + } + // HTTP doesn't allow you to set pseudoheaders after non pseudoheaders were set. + if isReservedHeader(k) { + continue + } + headerFields = append(headerFields, hpack.HeaderField{Name: strings.ToLower(k), Value: encodeMetadataHeader(k, v)}) + } + } + } + if md, ok := t.md.(*metadata.MD); ok { + for k, vv := range *md { + if isReservedHeader(k) { + continue + } + for _, v := range vv { + headerFields = append(headerFields, hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)}) + } + } + } + return headerFields, nil +} + +func (t *http2Client) createAudience(callHdr *CallHdr) string { + // Create an audience string only if needed. + if len(t.perRPCCreds) == 0 && callHdr.Creds == nil { + return "" + } + // Construct URI required to get auth request metadata. + // Omit port if it is the default one. + host := strings.TrimSuffix(callHdr.Host, ":443") + pos := strings.LastIndex(callHdr.Method, "/") + if pos == -1 { + pos = len(callHdr.Method) + } + return "https://" + host + callHdr.Method[:pos] +} + +func (t *http2Client) getTrAuthData(ctx context.Context, audience string) (map[string]string, error) { + if len(t.perRPCCreds) == 0 { + return nil, nil + } + authData := map[string]string{} + for _, c := range t.perRPCCreds { + data, err := c.GetRequestMetadata(ctx, audience) + if err != nil { + if _, ok := status.FromError(err); ok { + return nil, err + } + + return nil, status.Errorf(codes.Unauthenticated, "transport: %v", err) + } + for k, v := range data { + // Capital header names are illegal in HTTP/2. + k = strings.ToLower(k) + authData[k] = v + } + } + return authData, nil +} + +func (t *http2Client) getCallAuthData(ctx context.Context, audience string, callHdr *CallHdr) (map[string]string, error) { + var callAuthData map[string]string + // Check if credentials.PerRPCCredentials were provided via call options. + // Note: if these credentials are provided both via dial options and call + // options, then both sets of credentials will be applied. + if callCreds := callHdr.Creds; callCreds != nil { + if !t.isSecure && callCreds.RequireTransportSecurity() { + return nil, status.Error(codes.Unauthenticated, "transport: cannot send secure credentials on an insecure connection") + } + data, err := callCreds.GetRequestMetadata(ctx, audience) + if err != nil { + return nil, status.Errorf(codes.Internal, "transport: %v", err) + } + callAuthData = make(map[string]string, len(data)) + for k, v := range data { + // Capital header names are illegal in HTTP/2 + k = strings.ToLower(k) + callAuthData[k] = v + } + } + return callAuthData, nil +} + +// PerformedIOError wraps an error to indicate IO may have been performed +// before the error occurred. +type PerformedIOError struct { + Err error +} + +// Error implements error. +func (p PerformedIOError) Error() string { + return p.Err.Error() +} + +// NewStream creates a stream and registers it into the transport as "active" +// streams. +func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Stream, err error) { + ctx = peer.NewContext(ctx, t.getPeer()) + headerFields, err := t.createHeaderFields(ctx, callHdr) + if err != nil { + // We may have performed I/O in the per-RPC creds callback, so do not + // allow transparent retry. + return nil, PerformedIOError{err} + } + s := t.newStream(ctx, callHdr) + cleanup := func(err error) { + if s.swapState(streamDone) == streamDone { + // If it was already done, return. + return + } + // The stream was unprocessed by the server. + atomic.StoreUint32(&s.unprocessed, 1) + s.write(recvMsg{err: err}) + close(s.done) + // If headerChan isn't closed, then close it. + if atomic.CompareAndSwapUint32(&s.headerChanClosed, 0, 1) { + close(s.headerChan) + } + } + hdr := &headerFrame{ + hf: headerFields, + endStream: false, + initStream: func(id uint32) error { + t.mu.Lock() + if state := t.state; state != reachable { + t.mu.Unlock() + // Do a quick cleanup. + err := error(errStreamDrain) + if state == closing { + err = ErrConnClosing + } + cleanup(err) + return err + } + t.activeStreams[id] = s + if channelz.IsOn() { + atomic.AddInt64(&t.czData.streamsStarted, 1) + atomic.StoreInt64(&t.czData.lastStreamCreatedTime, time.Now().UnixNano()) + } + // If the keepalive goroutine has gone dormant, wake it up. + if t.kpDormant { + t.kpDormancyCond.Signal() + } + t.mu.Unlock() + return nil + }, + onOrphaned: cleanup, + wq: s.wq, + } + firstTry := true + var ch chan struct{} + checkForStreamQuota := func(it interface{}) bool { + if t.streamQuota <= 0 { // Can go negative if server decreases it. + if firstTry { + t.waitingStreams++ + } + ch = t.streamsQuotaAvailable + return false + } + if !firstTry { + t.waitingStreams-- + } + t.streamQuota-- + h := it.(*headerFrame) + h.streamID = t.nextID + t.nextID += 2 + s.id = h.streamID + s.fc = &inFlow{limit: uint32(t.initialWindowSize)} + if t.streamQuota > 0 && t.waitingStreams > 0 { + select { + case t.streamsQuotaAvailable <- struct{}{}: + default: + } + } + return true + } + var hdrListSizeErr error + checkForHeaderListSize := func(it interface{}) bool { + if t.maxSendHeaderListSize == nil { + return true + } + hdrFrame := it.(*headerFrame) + var sz int64 + for _, f := range hdrFrame.hf { + if sz += int64(f.Size()); sz > int64(*t.maxSendHeaderListSize) { + hdrListSizeErr = status.Errorf(codes.Internal, "header list size to send violates the maximum size (%d bytes) set by server", *t.maxSendHeaderListSize) + return false + } + } + return true + } + for { + success, err := t.controlBuf.executeAndPut(func(it interface{}) bool { + if !checkForStreamQuota(it) { + return false + } + if !checkForHeaderListSize(it) { + return false + } + return true + }, hdr) + if err != nil { + return nil, err + } + if success { + break + } + if hdrListSizeErr != nil { + return nil, hdrListSizeErr + } + firstTry = false + select { + case <-ch: + case <-s.ctx.Done(): + return nil, ContextErr(s.ctx.Err()) + case <-t.goAway: + return nil, errStreamDrain + case <-t.ctx.Done(): + return nil, ErrConnClosing + } + } + if t.statsHandler != nil { + header, ok := metadata.FromOutgoingContext(ctx) + if ok { + header.Set("user-agent", t.userAgent) + } else { + header = metadata.Pairs("user-agent", t.userAgent) + } + // Note: The header fields are compressed with hpack after this call returns. + // No WireLength field is set here. + outHeader := &stats.OutHeader{ + Client: true, + FullMethod: callHdr.Method, + RemoteAddr: t.remoteAddr, + LocalAddr: t.localAddr, + Compression: callHdr.SendCompress, + Header: header, + } + t.statsHandler.HandleRPC(s.ctx, outHeader) + } + return s, nil +} + +// CloseStream clears the footprint of a stream when the stream is not needed any more. +// This must not be executed in reader's goroutine. +func (t *http2Client) CloseStream(s *Stream, err error) { + var ( + rst bool + rstCode http2.ErrCode + ) + if err != nil { + rst = true + rstCode = http2.ErrCodeCancel + } + t.closeStream(s, err, rst, rstCode, status.Convert(err), nil, false) +} + +func (t *http2Client) closeStream(s *Stream, err error, rst bool, rstCode http2.ErrCode, st *status.Status, mdata map[string][]string, eosReceived bool) { + // Set stream status to done. + if s.swapState(streamDone) == streamDone { + // If it was already done, return. If multiple closeStream calls + // happen simultaneously, wait for the first to finish. + <-s.done + return + } + // status and trailers can be updated here without any synchronization because the stream goroutine will + // only read it after it sees an io.EOF error from read or write and we'll write those errors + // only after updating this. + s.status = st + if len(mdata) > 0 { + s.trailer = mdata + } + if err != nil { + // This will unblock reads eventually. + s.write(recvMsg{err: err}) + } + // If headerChan isn't closed, then close it. + if atomic.CompareAndSwapUint32(&s.headerChanClosed, 0, 1) { + s.noHeaders = true + close(s.headerChan) + } + cleanup := &cleanupStream{ + streamID: s.id, + onWrite: func() { + t.mu.Lock() + if t.activeStreams != nil { + delete(t.activeStreams, s.id) + } + t.mu.Unlock() + if channelz.IsOn() { + if eosReceived { + atomic.AddInt64(&t.czData.streamsSucceeded, 1) + } else { + atomic.AddInt64(&t.czData.streamsFailed, 1) + } + } + }, + rst: rst, + rstCode: rstCode, + } + addBackStreamQuota := func(interface{}) bool { + t.streamQuota++ + if t.streamQuota > 0 && t.waitingStreams > 0 { + select { + case t.streamsQuotaAvailable <- struct{}{}: + default: + } + } + return true + } + t.controlBuf.executeAndPut(addBackStreamQuota, cleanup) + // This will unblock write. + close(s.done) +} + +// Close kicks off the shutdown process of the transport. This should be called +// only once on a transport. Once it is called, the transport should not be +// accessed any more. +// +// This method blocks until the addrConn that initiated this transport is +// re-connected. This happens because t.onClose() begins reconnect logic at the +// addrConn level and blocks until the addrConn is successfully connected. +func (t *http2Client) Close() error { + t.mu.Lock() + // Make sure we only Close once. + if t.state == closing { + t.mu.Unlock() + return nil + } + // Call t.onClose before setting the state to closing to prevent the client + // from attempting to create new streams ASAP. + t.onClose() + t.state = closing + streams := t.activeStreams + t.activeStreams = nil + if t.kpDormant { + // If the keepalive goroutine is blocked on this condition variable, we + // should unblock it so that the goroutine eventually exits. + t.kpDormancyCond.Signal() + } + t.mu.Unlock() + t.controlBuf.finish() + t.cancel() + err := t.conn.Close() + if channelz.IsOn() { + channelz.RemoveEntry(t.channelzID) + } + // Notify all active streams. + for _, s := range streams { + t.closeStream(s, ErrConnClosing, false, http2.ErrCodeNo, status.New(codes.Unavailable, ErrConnClosing.Desc), nil, false) + } + if t.statsHandler != nil { + connEnd := &stats.ConnEnd{ + Client: true, + } + t.statsHandler.HandleConn(t.ctx, connEnd) + } + return err +} + +// GracefulClose sets the state to draining, which prevents new streams from +// being created and causes the transport to be closed when the last active +// stream is closed. If there are no active streams, the transport is closed +// immediately. This does nothing if the transport is already draining or +// closing. +func (t *http2Client) GracefulClose() { + t.mu.Lock() + // Make sure we move to draining only from active. + if t.state == draining || t.state == closing { + t.mu.Unlock() + return + } + t.state = draining + active := len(t.activeStreams) + t.mu.Unlock() + if active == 0 { + t.Close() + return + } + t.controlBuf.put(&incomingGoAway{}) +} + +// Write formats the data into HTTP2 data frame(s) and sends it out. The caller +// should proceed only if Write returns nil. +func (t *http2Client) Write(s *Stream, hdr []byte, data []byte, opts *Options) error { + if opts.Last { + // If it's the last message, update stream state. + if !s.compareAndSwapState(streamActive, streamWriteDone) { + return errStreamDone + } + } else if s.getState() != streamActive { + return errStreamDone + } + df := &dataFrame{ + streamID: s.id, + endStream: opts.Last, + h: hdr, + d: data, + } + if hdr != nil || data != nil { // If it's not an empty data frame, check quota. + if err := s.wq.get(int32(len(hdr) + len(data))); err != nil { + return err + } + } + return t.controlBuf.put(df) +} + +func (t *http2Client) getStream(f http2.Frame) *Stream { + t.mu.Lock() + s := t.activeStreams[f.Header().StreamID] + t.mu.Unlock() + return s +} + +// adjustWindow sends out extra window update over the initial window size +// of stream if the application is requesting data larger in size than +// the window. +func (t *http2Client) adjustWindow(s *Stream, n uint32) { + if w := s.fc.maybeAdjust(n); w > 0 { + t.controlBuf.put(&outgoingWindowUpdate{streamID: s.id, increment: w}) + } +} + +// updateWindow adjusts the inbound quota for the stream. +// Window updates will be sent out when the cumulative quota +// exceeds the corresponding threshold. +func (t *http2Client) updateWindow(s *Stream, n uint32) { + if w := s.fc.onRead(n); w > 0 { + t.controlBuf.put(&outgoingWindowUpdate{streamID: s.id, increment: w}) + } +} + +// updateFlowControl updates the incoming flow control windows +// for the transport and the stream based on the current bdp +// estimation. +func (t *http2Client) updateFlowControl(n uint32) { + t.mu.Lock() + for _, s := range t.activeStreams { + s.fc.newLimit(n) + } + t.mu.Unlock() + updateIWS := func(interface{}) bool { + t.initialWindowSize = int32(n) + return true + } + t.controlBuf.executeAndPut(updateIWS, &outgoingWindowUpdate{streamID: 0, increment: t.fc.newLimit(n)}) + t.controlBuf.put(&outgoingSettings{ + ss: []http2.Setting{ + { + ID: http2.SettingInitialWindowSize, + Val: n, + }, + }, + }) +} + +func (t *http2Client) handleData(f *http2.DataFrame) { + size := f.Header().Length + var sendBDPPing bool + if t.bdpEst != nil { + sendBDPPing = t.bdpEst.add(size) + } + // Decouple connection's flow control from application's read. + // An update on connection's flow control should not depend on + // whether user application has read the data or not. Such a + // restriction is already imposed on the stream's flow control, + // and therefore the sender will be blocked anyways. + // Decoupling the connection flow control will prevent other + // active(fast) streams from starving in presence of slow or + // inactive streams. + // + if w := t.fc.onData(size); w > 0 { + t.controlBuf.put(&outgoingWindowUpdate{ + streamID: 0, + increment: w, + }) + } + if sendBDPPing { + // Avoid excessive ping detection (e.g. in an L7 proxy) + // by sending a window update prior to the BDP ping. + + if w := t.fc.reset(); w > 0 { + t.controlBuf.put(&outgoingWindowUpdate{ + streamID: 0, + increment: w, + }) + } + + t.controlBuf.put(bdpPing) + } + // Select the right stream to dispatch. + s := t.getStream(f) + if s == nil { + return + } + if size > 0 { + if err := s.fc.onData(size); err != nil { + t.closeStream(s, io.EOF, true, http2.ErrCodeFlowControl, status.New(codes.Internal, err.Error()), nil, false) + return + } + if f.Header().Flags.Has(http2.FlagDataPadded) { + if w := s.fc.onRead(size - uint32(len(f.Data()))); w > 0 { + t.controlBuf.put(&outgoingWindowUpdate{s.id, w}) + } + } + // TODO(bradfitz, zhaoq): A copy is required here because there is no + // guarantee f.Data() is consumed before the arrival of next frame. + // Can this copy be eliminated? + if len(f.Data()) > 0 { + buffer := t.bufferPool.get() + buffer.Reset() + buffer.Write(f.Data()) + s.write(recvMsg{buffer: buffer}) + } + } + // The server has closed the stream without sending trailers. Record that + // the read direction is closed, and set the status appropriately. + if f.FrameHeader.Flags.Has(http2.FlagDataEndStream) { + t.closeStream(s, io.EOF, false, http2.ErrCodeNo, status.New(codes.Internal, "server closed the stream without sending trailers"), nil, true) + } +} + +func (t *http2Client) handleRSTStream(f *http2.RSTStreamFrame) { + s := t.getStream(f) + if s == nil { + return + } + if f.ErrCode == http2.ErrCodeRefusedStream { + // The stream was unprocessed by the server. + atomic.StoreUint32(&s.unprocessed, 1) + } + statusCode, ok := http2ErrConvTab[f.ErrCode] + if !ok { + if logger.V(logLevel) { + logger.Warningf("transport: http2Client.handleRSTStream found no mapped gRPC status for the received http2 error %v", f.ErrCode) + } + statusCode = codes.Unknown + } + if statusCode == codes.Canceled { + if d, ok := s.ctx.Deadline(); ok && !d.After(time.Now()) { + // Our deadline was already exceeded, and that was likely the cause + // of this cancelation. Alter the status code accordingly. + statusCode = codes.DeadlineExceeded + } + } + t.closeStream(s, io.EOF, false, http2.ErrCodeNo, status.Newf(statusCode, "stream terminated by RST_STREAM with error code: %v", f.ErrCode), nil, false) +} + +func (t *http2Client) handleSettings(f *http2.SettingsFrame, isFirst bool) { + if f.IsAck() { + return + } + var maxStreams *uint32 + var ss []http2.Setting + var updateFuncs []func() + f.ForeachSetting(func(s http2.Setting) error { + switch s.ID { + case http2.SettingMaxConcurrentStreams: + maxStreams = new(uint32) + *maxStreams = s.Val + case http2.SettingMaxHeaderListSize: + updateFuncs = append(updateFuncs, func() { + t.maxSendHeaderListSize = new(uint32) + *t.maxSendHeaderListSize = s.Val + }) + default: + ss = append(ss, s) + } + return nil + }) + if isFirst && maxStreams == nil { + maxStreams = new(uint32) + *maxStreams = math.MaxUint32 + } + sf := &incomingSettings{ + ss: ss, + } + if maxStreams != nil { + updateStreamQuota := func() { + delta := int64(*maxStreams) - int64(t.maxConcurrentStreams) + t.maxConcurrentStreams = *maxStreams + t.streamQuota += delta + if delta > 0 && t.waitingStreams > 0 { + close(t.streamsQuotaAvailable) // wake all of them up. + t.streamsQuotaAvailable = make(chan struct{}, 1) + } + } + updateFuncs = append(updateFuncs, updateStreamQuota) + } + t.controlBuf.executeAndPut(func(interface{}) bool { + for _, f := range updateFuncs { + f() + } + return true + }, sf) +} + +func (t *http2Client) handlePing(f *http2.PingFrame) { + if f.IsAck() { + // Maybe it's a BDP ping. + if t.bdpEst != nil { + t.bdpEst.calculate(f.Data) + } + return + } + pingAck := &ping{ack: true} + copy(pingAck.data[:], f.Data[:]) + t.controlBuf.put(pingAck) +} + +func (t *http2Client) handleGoAway(f *http2.GoAwayFrame) { + t.mu.Lock() + if t.state == closing { + t.mu.Unlock() + return + } + if f.ErrCode == http2.ErrCodeEnhanceYourCalm { + if logger.V(logLevel) { + logger.Infof("Client received GoAway with http2.ErrCodeEnhanceYourCalm.") + } + } + id := f.LastStreamID + if id > 0 && id%2 != 1 { + t.mu.Unlock() + t.Close() + return + } + // A client can receive multiple GoAways from the server (see + // https://github.com/grpc/grpc-go/issues/1387). The idea is that the first + // GoAway will be sent with an ID of MaxInt32 and the second GoAway will be + // sent after an RTT delay with the ID of the last stream the server will + // process. + // + // Therefore, when we get the first GoAway we don't necessarily close any + // streams. While in case of second GoAway we close all streams created after + // the GoAwayId. This way streams that were in-flight while the GoAway from + // server was being sent don't get killed. + select { + case <-t.goAway: // t.goAway has been closed (i.e.,multiple GoAways). + // If there are multiple GoAways the first one should always have an ID greater than the following ones. + if id > t.prevGoAwayID { + t.mu.Unlock() + t.Close() + return + } + default: + t.setGoAwayReason(f) + close(t.goAway) + t.controlBuf.put(&incomingGoAway{}) + // Notify the clientconn about the GOAWAY before we set the state to + // draining, to allow the client to stop attempting to create streams + // before disallowing new streams on this connection. + t.onGoAway(t.goAwayReason) + t.state = draining + } + // All streams with IDs greater than the GoAwayId + // and smaller than the previous GoAway ID should be killed. + upperLimit := t.prevGoAwayID + if upperLimit == 0 { // This is the first GoAway Frame. + upperLimit = math.MaxUint32 // Kill all streams after the GoAway ID. + } + for streamID, stream := range t.activeStreams { + if streamID > id && streamID <= upperLimit { + // The stream was unprocessed by the server. + atomic.StoreUint32(&stream.unprocessed, 1) + t.closeStream(stream, errStreamDrain, false, http2.ErrCodeNo, statusGoAway, nil, false) + } + } + t.prevGoAwayID = id + active := len(t.activeStreams) + t.mu.Unlock() + if active == 0 { + t.Close() + } +} + +// setGoAwayReason sets the value of t.goAwayReason based +// on the GoAway frame received. +// It expects a lock on transport's mutext to be held by +// the caller. +func (t *http2Client) setGoAwayReason(f *http2.GoAwayFrame) { + t.goAwayReason = GoAwayNoReason + switch f.ErrCode { + case http2.ErrCodeEnhanceYourCalm: + if string(f.DebugData()) == "too_many_pings" { + t.goAwayReason = GoAwayTooManyPings + } + } +} + +func (t *http2Client) GetGoAwayReason() GoAwayReason { + t.mu.Lock() + defer t.mu.Unlock() + return t.goAwayReason +} + +func (t *http2Client) handleWindowUpdate(f *http2.WindowUpdateFrame) { + t.controlBuf.put(&incomingWindowUpdate{ + streamID: f.Header().StreamID, + increment: f.Increment, + }) +} + +// operateHeaders takes action on the decoded headers. +func (t *http2Client) operateHeaders(frame *http2.MetaHeadersFrame) { + s := t.getStream(frame) + if s == nil { + return + } + endStream := frame.StreamEnded() + atomic.StoreUint32(&s.bytesReceived, 1) + initialHeader := atomic.LoadUint32(&s.headerChanClosed) == 0 + + if !initialHeader && !endStream { + // As specified by gRPC over HTTP2, a HEADERS frame (and associated CONTINUATION frames) can only appear at the start or end of a stream. Therefore, second HEADERS frame must have EOS bit set. + st := status.New(codes.Internal, "a HEADERS frame cannot appear in the middle of a stream") + t.closeStream(s, st.Err(), true, http2.ErrCodeProtocol, st, nil, false) + return + } + + state := &decodeState{} + // Initialize isGRPC value to be !initialHeader, since if a gRPC Response-Headers has already been received, then it means that the peer is speaking gRPC and we are in gRPC mode. + state.data.isGRPC = !initialHeader + if h2code, err := state.decodeHeader(frame); err != nil { + t.closeStream(s, err, true, h2code, status.Convert(err), nil, endStream) + return + } + + isHeader := false + defer func() { + if t.statsHandler != nil { + if isHeader { + inHeader := &stats.InHeader{ + Client: true, + WireLength: int(frame.Header().Length), + Header: s.header.Copy(), + Compression: s.recvCompress, + } + t.statsHandler.HandleRPC(s.ctx, inHeader) + } else { + inTrailer := &stats.InTrailer{ + Client: true, + WireLength: int(frame.Header().Length), + Trailer: s.trailer.Copy(), + } + t.statsHandler.HandleRPC(s.ctx, inTrailer) + } + } + }() + + // If headerChan hasn't been closed yet + if atomic.CompareAndSwapUint32(&s.headerChanClosed, 0, 1) { + s.headerValid = true + if !endStream { + // HEADERS frame block carries a Response-Headers. + isHeader = true + // These values can be set without any synchronization because + // stream goroutine will read it only after seeing a closed + // headerChan which we'll close after setting this. + s.recvCompress = state.data.encoding + if len(state.data.mdata) > 0 { + s.header = state.data.mdata + } + } else { + // HEADERS frame block carries a Trailers-Only. + s.noHeaders = true + } + close(s.headerChan) + } + + if !endStream { + return + } + + // if client received END_STREAM from server while stream was still active, send RST_STREAM + rst := s.getState() == streamActive + t.closeStream(s, io.EOF, rst, http2.ErrCodeNo, state.status(), state.data.mdata, true) +} + +// reader runs as a separate goroutine in charge of reading data from network +// connection. +// +// TODO(zhaoq): currently one reader per transport. Investigate whether this is +// optimal. +// TODO(zhaoq): Check the validity of the incoming frame sequence. +func (t *http2Client) reader() { + defer close(t.readerDone) + // Check the validity of server preface. + frame, err := t.framer.fr.ReadFrame() + if err != nil { + t.Close() // this kicks off resetTransport, so must be last before return + return + } + t.conn.SetReadDeadline(time.Time{}) // reset deadline once we get the settings frame (we didn't time out, yay!) + if t.keepaliveEnabled { + atomic.StoreInt64(&t.lastRead, time.Now().UnixNano()) + } + sf, ok := frame.(*http2.SettingsFrame) + if !ok { + t.Close() // this kicks off resetTransport, so must be last before return + return + } + t.onPrefaceReceipt() + t.handleSettings(sf, true) + + // loop to keep reading incoming messages on this transport. + for { + t.controlBuf.throttle() + frame, err := t.framer.fr.ReadFrame() + if t.keepaliveEnabled { + atomic.StoreInt64(&t.lastRead, time.Now().UnixNano()) + } + if err != nil { + // Abort an active stream if the http2.Framer returns a + // http2.StreamError. This can happen only if the server's response + // is malformed http2. + if se, ok := err.(http2.StreamError); ok { + t.mu.Lock() + s := t.activeStreams[se.StreamID] + t.mu.Unlock() + if s != nil { + // use error detail to provide better err message + code := http2ErrConvTab[se.Code] + errorDetail := t.framer.fr.ErrorDetail() + var msg string + if errorDetail != nil { + msg = errorDetail.Error() + } else { + msg = "received invalid frame" + } + t.closeStream(s, status.Error(code, msg), true, http2.ErrCodeProtocol, status.New(code, msg), nil, false) + } + continue + } else { + // Transport error. + t.Close() + return + } + } + switch frame := frame.(type) { + case *http2.MetaHeadersFrame: + t.operateHeaders(frame) + case *http2.DataFrame: + t.handleData(frame) + case *http2.RSTStreamFrame: + t.handleRSTStream(frame) + case *http2.SettingsFrame: + t.handleSettings(frame, false) + case *http2.PingFrame: + t.handlePing(frame) + case *http2.GoAwayFrame: + t.handleGoAway(frame) + case *http2.WindowUpdateFrame: + t.handleWindowUpdate(frame) + default: + if logger.V(logLevel) { + logger.Errorf("transport: http2Client.reader got unhandled frame type %v.", frame) + } + } + } +} + +func minTime(a, b time.Duration) time.Duration { + if a < b { + return a + } + return b +} + +// keepalive running in a separate goroutune makes sure the connection is alive by sending pings. +func (t *http2Client) keepalive() { + p := &ping{data: [8]byte{}} + // True iff a ping has been sent, and no data has been received since then. + outstandingPing := false + // Amount of time remaining before which we should receive an ACK for the + // last sent ping. + timeoutLeft := time.Duration(0) + // Records the last value of t.lastRead before we go block on the timer. + // This is required to check for read activity since then. + prevNano := time.Now().UnixNano() + timer := time.NewTimer(t.kp.Time) + for { + select { + case <-timer.C: + lastRead := atomic.LoadInt64(&t.lastRead) + if lastRead > prevNano { + // There has been read activity since the last time we were here. + outstandingPing = false + // Next timer should fire at kp.Time seconds from lastRead time. + timer.Reset(time.Duration(lastRead) + t.kp.Time - time.Duration(time.Now().UnixNano())) + prevNano = lastRead + continue + } + if outstandingPing && timeoutLeft <= 0 { + t.Close() + return + } + t.mu.Lock() + if t.state == closing { + // If the transport is closing, we should exit from the + // keepalive goroutine here. If not, we could have a race + // between the call to Signal() from Close() and the call to + // Wait() here, whereby the keepalive goroutine ends up + // blocking on the condition variable which will never be + // signalled again. + t.mu.Unlock() + return + } + if len(t.activeStreams) < 1 && !t.kp.PermitWithoutStream { + // If a ping was sent out previously (because there were active + // streams at that point) which wasn't acked and its timeout + // hadn't fired, but we got here and are about to go dormant, + // we should make sure that we unconditionally send a ping once + // we awaken. + outstandingPing = false + t.kpDormant = true + t.kpDormancyCond.Wait() + } + t.kpDormant = false + t.mu.Unlock() + + // We get here either because we were dormant and a new stream was + // created which unblocked the Wait() call, or because the + // keepalive timer expired. In both cases, we need to send a ping. + if !outstandingPing { + if channelz.IsOn() { + atomic.AddInt64(&t.czData.kpCount, 1) + } + t.controlBuf.put(p) + timeoutLeft = t.kp.Timeout + outstandingPing = true + } + // The amount of time to sleep here is the minimum of kp.Time and + // timeoutLeft. This will ensure that we wait only for kp.Time + // before sending out the next ping (for cases where the ping is + // acked). + sleepDuration := minTime(t.kp.Time, timeoutLeft) + timeoutLeft -= sleepDuration + timer.Reset(sleepDuration) + case <-t.ctx.Done(): + if !timer.Stop() { + <-timer.C + } + return + } + } +} + +func (t *http2Client) Error() <-chan struct{} { + return t.ctx.Done() +} + +func (t *http2Client) GoAway() <-chan struct{} { + return t.goAway +} + +func (t *http2Client) ChannelzMetric() *channelz.SocketInternalMetric { + s := channelz.SocketInternalMetric{ + StreamsStarted: atomic.LoadInt64(&t.czData.streamsStarted), + StreamsSucceeded: atomic.LoadInt64(&t.czData.streamsSucceeded), + StreamsFailed: atomic.LoadInt64(&t.czData.streamsFailed), + MessagesSent: atomic.LoadInt64(&t.czData.msgSent), + MessagesReceived: atomic.LoadInt64(&t.czData.msgRecv), + KeepAlivesSent: atomic.LoadInt64(&t.czData.kpCount), + LastLocalStreamCreatedTimestamp: time.Unix(0, atomic.LoadInt64(&t.czData.lastStreamCreatedTime)), + LastMessageSentTimestamp: time.Unix(0, atomic.LoadInt64(&t.czData.lastMsgSentTime)), + LastMessageReceivedTimestamp: time.Unix(0, atomic.LoadInt64(&t.czData.lastMsgRecvTime)), + LocalFlowControlWindow: int64(t.fc.getSize()), + SocketOptions: channelz.GetSocketOption(t.conn), + LocalAddr: t.localAddr, + RemoteAddr: t.remoteAddr, + // RemoteName : + } + if au, ok := t.authInfo.(credentials.ChannelzSecurityInfo); ok { + s.Security = au.GetSecurityValue() + } + s.RemoteFlowControlWindow = t.getOutFlowWindow() + return &s +} + +func (t *http2Client) RemoteAddr() net.Addr { return t.remoteAddr } + +func (t *http2Client) IncrMsgSent() { + atomic.AddInt64(&t.czData.msgSent, 1) + atomic.StoreInt64(&t.czData.lastMsgSentTime, time.Now().UnixNano()) +} + +func (t *http2Client) IncrMsgRecv() { + atomic.AddInt64(&t.czData.msgRecv, 1) + atomic.StoreInt64(&t.czData.lastMsgRecvTime, time.Now().UnixNano()) +} + +func (t *http2Client) getOutFlowWindow() int64 { + resp := make(chan uint32, 1) + timer := time.NewTimer(time.Second) + defer timer.Stop() + t.controlBuf.put(&outFlowControlSizeRequest{resp}) + select { + case sz := <-resp: + return int64(sz) + case <-t.ctxDone: + return -1 + case <-timer.C: + return -2 + } +} diff --git a/vendor/google.golang.org/grpc/internal/transport/http2_server.go b/vendor/google.golang.org/grpc/internal/transport/http2_server.go new file mode 100644 index 000000000..0cf1cc320 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/transport/http2_server.go @@ -0,0 +1,1268 @@ +/* + * + * Copyright 2014 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package transport + +import ( + "bytes" + "context" + "errors" + "fmt" + "io" + "math" + "net" + "strconv" + "sync" + "sync/atomic" + "time" + + "github.com/golang/protobuf/proto" + "golang.org/x/net/http2" + "golang.org/x/net/http2/hpack" + "google.golang.org/grpc/internal/grpcutil" + + "google.golang.org/grpc/codes" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/internal/channelz" + "google.golang.org/grpc/internal/grpcrand" + "google.golang.org/grpc/keepalive" + "google.golang.org/grpc/metadata" + "google.golang.org/grpc/peer" + "google.golang.org/grpc/stats" + "google.golang.org/grpc/status" + "google.golang.org/grpc/tap" +) + +var ( + // ErrIllegalHeaderWrite indicates that setting header is illegal because of + // the stream's state. + ErrIllegalHeaderWrite = errors.New("transport: the stream is done or WriteHeader was already called") + // ErrHeaderListSizeLimitViolation indicates that the header list size is larger + // than the limit set by peer. + ErrHeaderListSizeLimitViolation = errors.New("transport: trying to send header list size larger than the limit set by peer") +) + +// serverConnectionCounter counts the number of connections a server has seen +// (equal to the number of http2Servers created). Must be accessed atomically. +var serverConnectionCounter uint64 + +// http2Server implements the ServerTransport interface with HTTP2. +type http2Server struct { + lastRead int64 // Keep this field 64-bit aligned. Accessed atomically. + ctx context.Context + done chan struct{} + conn net.Conn + loopy *loopyWriter + readerDone chan struct{} // sync point to enable testing. + writerDone chan struct{} // sync point to enable testing. + remoteAddr net.Addr + localAddr net.Addr + maxStreamID uint32 // max stream ID ever seen + authInfo credentials.AuthInfo // auth info about the connection + inTapHandle tap.ServerInHandle + framer *framer + // The max number of concurrent streams. + maxStreams uint32 + // controlBuf delivers all the control related tasks (e.g., window + // updates, reset streams, and various settings) to the controller. + controlBuf *controlBuffer + fc *trInFlow + stats stats.Handler + // Keepalive and max-age parameters for the server. + kp keepalive.ServerParameters + // Keepalive enforcement policy. + kep keepalive.EnforcementPolicy + // The time instance last ping was received. + lastPingAt time.Time + // Number of times the client has violated keepalive ping policy so far. + pingStrikes uint8 + // Flag to signify that number of ping strikes should be reset to 0. + // This is set whenever data or header frames are sent. + // 1 means yes. + resetPingStrikes uint32 // Accessed atomically. + initialWindowSize int32 + bdpEst *bdpEstimator + maxSendHeaderListSize *uint32 + + mu sync.Mutex // guard the following + + // drainChan is initialized when drain(...) is called the first time. + // After which the server writes out the first GoAway(with ID 2^31-1) frame. + // Then an independent goroutine will be launched to later send the second GoAway. + // During this time we don't want to write another first GoAway(with ID 2^31 -1) frame. + // Thus call to drain(...) will be a no-op if drainChan is already initialized since draining is + // already underway. + drainChan chan struct{} + state transportState + activeStreams map[uint32]*Stream + // idle is the time instant when the connection went idle. + // This is either the beginning of the connection or when the number of + // RPCs go down to 0. + // When the connection is busy, this value is set to 0. + idle time.Time + + // Fields below are for channelz metric collection. + channelzID int64 // channelz unique identification number + czData *channelzData + bufferPool *bufferPool + + connectionID uint64 +} + +// newHTTP2Server constructs a ServerTransport based on HTTP2. ConnectionError is +// returned if something goes wrong. +func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err error) { + writeBufSize := config.WriteBufferSize + readBufSize := config.ReadBufferSize + maxHeaderListSize := defaultServerMaxHeaderListSize + if config.MaxHeaderListSize != nil { + maxHeaderListSize = *config.MaxHeaderListSize + } + framer := newFramer(conn, writeBufSize, readBufSize, maxHeaderListSize) + // Send initial settings as connection preface to client. + isettings := []http2.Setting{{ + ID: http2.SettingMaxFrameSize, + Val: http2MaxFrameLen, + }} + // TODO(zhaoq): Have a better way to signal "no limit" because 0 is + // permitted in the HTTP2 spec. + maxStreams := config.MaxStreams + if maxStreams == 0 { + maxStreams = math.MaxUint32 + } else { + isettings = append(isettings, http2.Setting{ + ID: http2.SettingMaxConcurrentStreams, + Val: maxStreams, + }) + } + dynamicWindow := true + iwz := int32(initialWindowSize) + if config.InitialWindowSize >= defaultWindowSize { + iwz = config.InitialWindowSize + dynamicWindow = false + } + icwz := int32(initialWindowSize) + if config.InitialConnWindowSize >= defaultWindowSize { + icwz = config.InitialConnWindowSize + dynamicWindow = false + } + if iwz != defaultWindowSize { + isettings = append(isettings, http2.Setting{ + ID: http2.SettingInitialWindowSize, + Val: uint32(iwz)}) + } + if config.MaxHeaderListSize != nil { + isettings = append(isettings, http2.Setting{ + ID: http2.SettingMaxHeaderListSize, + Val: *config.MaxHeaderListSize, + }) + } + if config.HeaderTableSize != nil { + isettings = append(isettings, http2.Setting{ + ID: http2.SettingHeaderTableSize, + Val: *config.HeaderTableSize, + }) + } + if err := framer.fr.WriteSettings(isettings...); err != nil { + return nil, connectionErrorf(false, err, "transport: %v", err) + } + // Adjust the connection flow control window if needed. + if delta := uint32(icwz - defaultWindowSize); delta > 0 { + if err := framer.fr.WriteWindowUpdate(0, delta); err != nil { + return nil, connectionErrorf(false, err, "transport: %v", err) + } + } + kp := config.KeepaliveParams + if kp.MaxConnectionIdle == 0 { + kp.MaxConnectionIdle = defaultMaxConnectionIdle + } + if kp.MaxConnectionAge == 0 { + kp.MaxConnectionAge = defaultMaxConnectionAge + } + // Add a jitter to MaxConnectionAge. + kp.MaxConnectionAge += getJitter(kp.MaxConnectionAge) + if kp.MaxConnectionAgeGrace == 0 { + kp.MaxConnectionAgeGrace = defaultMaxConnectionAgeGrace + } + if kp.Time == 0 { + kp.Time = defaultServerKeepaliveTime + } + if kp.Timeout == 0 { + kp.Timeout = defaultServerKeepaliveTimeout + } + kep := config.KeepalivePolicy + if kep.MinTime == 0 { + kep.MinTime = defaultKeepalivePolicyMinTime + } + done := make(chan struct{}) + t := &http2Server{ + ctx: context.Background(), + done: done, + conn: conn, + remoteAddr: conn.RemoteAddr(), + localAddr: conn.LocalAddr(), + authInfo: config.AuthInfo, + framer: framer, + readerDone: make(chan struct{}), + writerDone: make(chan struct{}), + maxStreams: maxStreams, + inTapHandle: config.InTapHandle, + fc: &trInFlow{limit: uint32(icwz)}, + state: reachable, + activeStreams: make(map[uint32]*Stream), + stats: config.StatsHandler, + kp: kp, + idle: time.Now(), + kep: kep, + initialWindowSize: iwz, + czData: new(channelzData), + bufferPool: newBufferPool(), + } + t.controlBuf = newControlBuffer(t.done) + if dynamicWindow { + t.bdpEst = &bdpEstimator{ + bdp: initialWindowSize, + updateFlowControl: t.updateFlowControl, + } + } + if t.stats != nil { + t.ctx = t.stats.TagConn(t.ctx, &stats.ConnTagInfo{ + RemoteAddr: t.remoteAddr, + LocalAddr: t.localAddr, + }) + connBegin := &stats.ConnBegin{} + t.stats.HandleConn(t.ctx, connBegin) + } + if channelz.IsOn() { + t.channelzID = channelz.RegisterNormalSocket(t, config.ChannelzParentID, fmt.Sprintf("%s -> %s", t.remoteAddr, t.localAddr)) + } + + t.connectionID = atomic.AddUint64(&serverConnectionCounter, 1) + + t.framer.writer.Flush() + + defer func() { + if err != nil { + t.Close() + } + }() + + // Check the validity of client preface. + preface := make([]byte, len(clientPreface)) + if _, err := io.ReadFull(t.conn, preface); err != nil { + return nil, connectionErrorf(false, err, "transport: http2Server.HandleStreams failed to receive the preface from client: %v", err) + } + if !bytes.Equal(preface, clientPreface) { + return nil, connectionErrorf(false, nil, "transport: http2Server.HandleStreams received bogus greeting from client: %q", preface) + } + + frame, err := t.framer.fr.ReadFrame() + if err == io.EOF || err == io.ErrUnexpectedEOF { + return nil, err + } + if err != nil { + return nil, connectionErrorf(false, err, "transport: http2Server.HandleStreams failed to read initial settings frame: %v", err) + } + atomic.StoreInt64(&t.lastRead, time.Now().UnixNano()) + sf, ok := frame.(*http2.SettingsFrame) + if !ok { + return nil, connectionErrorf(false, nil, "transport: http2Server.HandleStreams saw invalid preface type %T from client", frame) + } + t.handleSettings(sf) + + go func() { + t.loopy = newLoopyWriter(serverSide, t.framer, t.controlBuf, t.bdpEst) + t.loopy.ssGoAwayHandler = t.outgoingGoAwayHandler + if err := t.loopy.run(); err != nil { + if logger.V(logLevel) { + logger.Errorf("transport: loopyWriter.run returning. Err: %v", err) + } + } + t.conn.Close() + close(t.writerDone) + }() + go t.keepalive() + return t, nil +} + +// operateHeader takes action on the decoded headers. +func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(*Stream), traceCtx func(context.Context, string) context.Context) (fatal bool) { + streamID := frame.Header().StreamID + state := &decodeState{ + serverSide: true, + } + if h2code, err := state.decodeHeader(frame); err != nil { + if _, ok := status.FromError(err); ok { + t.controlBuf.put(&cleanupStream{ + streamID: streamID, + rst: true, + rstCode: h2code, + onWrite: func() {}, + }) + } + return false + } + + buf := newRecvBuffer() + s := &Stream{ + id: streamID, + st: t, + buf: buf, + fc: &inFlow{limit: uint32(t.initialWindowSize)}, + recvCompress: state.data.encoding, + method: state.data.method, + contentSubtype: state.data.contentSubtype, + } + if frame.StreamEnded() { + // s is just created by the caller. No lock needed. + s.state = streamReadDone + } + if state.data.timeoutSet { + s.ctx, s.cancel = context.WithTimeout(t.ctx, state.data.timeout) + } else { + s.ctx, s.cancel = context.WithCancel(t.ctx) + } + pr := &peer.Peer{ + Addr: t.remoteAddr, + } + // Attach Auth info if there is any. + if t.authInfo != nil { + pr.AuthInfo = t.authInfo + } + s.ctx = peer.NewContext(s.ctx, pr) + // Attach the received metadata to the context. + if len(state.data.mdata) > 0 { + s.ctx = metadata.NewIncomingContext(s.ctx, state.data.mdata) + } + if state.data.statsTags != nil { + s.ctx = stats.SetIncomingTags(s.ctx, state.data.statsTags) + } + if state.data.statsTrace != nil { + s.ctx = stats.SetIncomingTrace(s.ctx, state.data.statsTrace) + } + if t.inTapHandle != nil { + var err error + info := &tap.Info{ + FullMethodName: state.data.method, + } + s.ctx, err = t.inTapHandle(s.ctx, info) + if err != nil { + if logger.V(logLevel) { + logger.Warningf("transport: http2Server.operateHeaders got an error from InTapHandle: %v", err) + } + t.controlBuf.put(&cleanupStream{ + streamID: s.id, + rst: true, + rstCode: http2.ErrCodeRefusedStream, + onWrite: func() {}, + }) + s.cancel() + return false + } + } + t.mu.Lock() + if t.state != reachable { + t.mu.Unlock() + s.cancel() + return false + } + if uint32(len(t.activeStreams)) >= t.maxStreams { + t.mu.Unlock() + t.controlBuf.put(&cleanupStream{ + streamID: streamID, + rst: true, + rstCode: http2.ErrCodeRefusedStream, + onWrite: func() {}, + }) + s.cancel() + return false + } + if streamID%2 != 1 || streamID <= t.maxStreamID { + t.mu.Unlock() + // illegal gRPC stream id. + if logger.V(logLevel) { + logger.Errorf("transport: http2Server.HandleStreams received an illegal stream id: %v", streamID) + } + s.cancel() + return true + } + t.maxStreamID = streamID + t.activeStreams[streamID] = s + if len(t.activeStreams) == 1 { + t.idle = time.Time{} + } + t.mu.Unlock() + if channelz.IsOn() { + atomic.AddInt64(&t.czData.streamsStarted, 1) + atomic.StoreInt64(&t.czData.lastStreamCreatedTime, time.Now().UnixNano()) + } + s.requestRead = func(n int) { + t.adjustWindow(s, uint32(n)) + } + s.ctx = traceCtx(s.ctx, s.method) + if t.stats != nil { + s.ctx = t.stats.TagRPC(s.ctx, &stats.RPCTagInfo{FullMethodName: s.method}) + inHeader := &stats.InHeader{ + FullMethod: s.method, + RemoteAddr: t.remoteAddr, + LocalAddr: t.localAddr, + Compression: s.recvCompress, + WireLength: int(frame.Header().Length), + Header: metadata.MD(state.data.mdata).Copy(), + } + t.stats.HandleRPC(s.ctx, inHeader) + } + s.ctxDone = s.ctx.Done() + s.wq = newWriteQuota(defaultWriteQuota, s.ctxDone) + s.trReader = &transportReader{ + reader: &recvBufferReader{ + ctx: s.ctx, + ctxDone: s.ctxDone, + recv: s.buf, + freeBuffer: t.bufferPool.put, + }, + windowHandler: func(n int) { + t.updateWindow(s, uint32(n)) + }, + } + // Register the stream with loopy. + t.controlBuf.put(®isterStream{ + streamID: s.id, + wq: s.wq, + }) + handle(s) + return false +} + +// HandleStreams receives incoming streams using the given handler. This is +// typically run in a separate goroutine. +// traceCtx attaches trace to ctx and returns the new context. +func (t *http2Server) HandleStreams(handle func(*Stream), traceCtx func(context.Context, string) context.Context) { + defer close(t.readerDone) + for { + t.controlBuf.throttle() + frame, err := t.framer.fr.ReadFrame() + atomic.StoreInt64(&t.lastRead, time.Now().UnixNano()) + if err != nil { + if se, ok := err.(http2.StreamError); ok { + if logger.V(logLevel) { + logger.Warningf("transport: http2Server.HandleStreams encountered http2.StreamError: %v", se) + } + t.mu.Lock() + s := t.activeStreams[se.StreamID] + t.mu.Unlock() + if s != nil { + t.closeStream(s, true, se.Code, false) + } else { + t.controlBuf.put(&cleanupStream{ + streamID: se.StreamID, + rst: true, + rstCode: se.Code, + onWrite: func() {}, + }) + } + continue + } + if err == io.EOF || err == io.ErrUnexpectedEOF { + t.Close() + return + } + if logger.V(logLevel) { + logger.Warningf("transport: http2Server.HandleStreams failed to read frame: %v", err) + } + t.Close() + return + } + switch frame := frame.(type) { + case *http2.MetaHeadersFrame: + if t.operateHeaders(frame, handle, traceCtx) { + t.Close() + break + } + case *http2.DataFrame: + t.handleData(frame) + case *http2.RSTStreamFrame: + t.handleRSTStream(frame) + case *http2.SettingsFrame: + t.handleSettings(frame) + case *http2.PingFrame: + t.handlePing(frame) + case *http2.WindowUpdateFrame: + t.handleWindowUpdate(frame) + case *http2.GoAwayFrame: + // TODO: Handle GoAway from the client appropriately. + default: + if logger.V(logLevel) { + logger.Errorf("transport: http2Server.HandleStreams found unhandled frame type %v.", frame) + } + } + } +} + +func (t *http2Server) getStream(f http2.Frame) (*Stream, bool) { + t.mu.Lock() + defer t.mu.Unlock() + if t.activeStreams == nil { + // The transport is closing. + return nil, false + } + s, ok := t.activeStreams[f.Header().StreamID] + if !ok { + // The stream is already done. + return nil, false + } + return s, true +} + +// adjustWindow sends out extra window update over the initial window size +// of stream if the application is requesting data larger in size than +// the window. +func (t *http2Server) adjustWindow(s *Stream, n uint32) { + if w := s.fc.maybeAdjust(n); w > 0 { + t.controlBuf.put(&outgoingWindowUpdate{streamID: s.id, increment: w}) + } + +} + +// updateWindow adjusts the inbound quota for the stream and the transport. +// Window updates will deliver to the controller for sending when +// the cumulative quota exceeds the corresponding threshold. +func (t *http2Server) updateWindow(s *Stream, n uint32) { + if w := s.fc.onRead(n); w > 0 { + t.controlBuf.put(&outgoingWindowUpdate{streamID: s.id, + increment: w, + }) + } +} + +// updateFlowControl updates the incoming flow control windows +// for the transport and the stream based on the current bdp +// estimation. +func (t *http2Server) updateFlowControl(n uint32) { + t.mu.Lock() + for _, s := range t.activeStreams { + s.fc.newLimit(n) + } + t.initialWindowSize = int32(n) + t.mu.Unlock() + t.controlBuf.put(&outgoingWindowUpdate{ + streamID: 0, + increment: t.fc.newLimit(n), + }) + t.controlBuf.put(&outgoingSettings{ + ss: []http2.Setting{ + { + ID: http2.SettingInitialWindowSize, + Val: n, + }, + }, + }) + +} + +func (t *http2Server) handleData(f *http2.DataFrame) { + size := f.Header().Length + var sendBDPPing bool + if t.bdpEst != nil { + sendBDPPing = t.bdpEst.add(size) + } + // Decouple connection's flow control from application's read. + // An update on connection's flow control should not depend on + // whether user application has read the data or not. Such a + // restriction is already imposed on the stream's flow control, + // and therefore the sender will be blocked anyways. + // Decoupling the connection flow control will prevent other + // active(fast) streams from starving in presence of slow or + // inactive streams. + if w := t.fc.onData(size); w > 0 { + t.controlBuf.put(&outgoingWindowUpdate{ + streamID: 0, + increment: w, + }) + } + if sendBDPPing { + // Avoid excessive ping detection (e.g. in an L7 proxy) + // by sending a window update prior to the BDP ping. + if w := t.fc.reset(); w > 0 { + t.controlBuf.put(&outgoingWindowUpdate{ + streamID: 0, + increment: w, + }) + } + t.controlBuf.put(bdpPing) + } + // Select the right stream to dispatch. + s, ok := t.getStream(f) + if !ok { + return + } + if s.getState() == streamReadDone { + t.closeStream(s, true, http2.ErrCodeStreamClosed, false) + return + } + if size > 0 { + if err := s.fc.onData(size); err != nil { + t.closeStream(s, true, http2.ErrCodeFlowControl, false) + return + } + if f.Header().Flags.Has(http2.FlagDataPadded) { + if w := s.fc.onRead(size - uint32(len(f.Data()))); w > 0 { + t.controlBuf.put(&outgoingWindowUpdate{s.id, w}) + } + } + // TODO(bradfitz, zhaoq): A copy is required here because there is no + // guarantee f.Data() is consumed before the arrival of next frame. + // Can this copy be eliminated? + if len(f.Data()) > 0 { + buffer := t.bufferPool.get() + buffer.Reset() + buffer.Write(f.Data()) + s.write(recvMsg{buffer: buffer}) + } + } + if f.Header().Flags.Has(http2.FlagDataEndStream) { + // Received the end of stream from the client. + s.compareAndSwapState(streamActive, streamReadDone) + s.write(recvMsg{err: io.EOF}) + } +} + +func (t *http2Server) handleRSTStream(f *http2.RSTStreamFrame) { + // If the stream is not deleted from the transport's active streams map, then do a regular close stream. + if s, ok := t.getStream(f); ok { + t.closeStream(s, false, 0, false) + return + } + // If the stream is already deleted from the active streams map, then put a cleanupStream item into controlbuf to delete the stream from loopy writer's established streams map. + t.controlBuf.put(&cleanupStream{ + streamID: f.Header().StreamID, + rst: false, + rstCode: 0, + onWrite: func() {}, + }) +} + +func (t *http2Server) handleSettings(f *http2.SettingsFrame) { + if f.IsAck() { + return + } + var ss []http2.Setting + var updateFuncs []func() + f.ForeachSetting(func(s http2.Setting) error { + switch s.ID { + case http2.SettingMaxHeaderListSize: + updateFuncs = append(updateFuncs, func() { + t.maxSendHeaderListSize = new(uint32) + *t.maxSendHeaderListSize = s.Val + }) + default: + ss = append(ss, s) + } + return nil + }) + t.controlBuf.executeAndPut(func(interface{}) bool { + for _, f := range updateFuncs { + f() + } + return true + }, &incomingSettings{ + ss: ss, + }) +} + +const ( + maxPingStrikes = 2 + defaultPingTimeout = 2 * time.Hour +) + +func (t *http2Server) handlePing(f *http2.PingFrame) { + if f.IsAck() { + if f.Data == goAwayPing.data && t.drainChan != nil { + close(t.drainChan) + return + } + // Maybe it's a BDP ping. + if t.bdpEst != nil { + t.bdpEst.calculate(f.Data) + } + return + } + pingAck := &ping{ack: true} + copy(pingAck.data[:], f.Data[:]) + t.controlBuf.put(pingAck) + + now := time.Now() + defer func() { + t.lastPingAt = now + }() + // A reset ping strikes means that we don't need to check for policy + // violation for this ping and the pingStrikes counter should be set + // to 0. + if atomic.CompareAndSwapUint32(&t.resetPingStrikes, 1, 0) { + t.pingStrikes = 0 + return + } + t.mu.Lock() + ns := len(t.activeStreams) + t.mu.Unlock() + if ns < 1 && !t.kep.PermitWithoutStream { + // Keepalive shouldn't be active thus, this new ping should + // have come after at least defaultPingTimeout. + if t.lastPingAt.Add(defaultPingTimeout).After(now) { + t.pingStrikes++ + } + } else { + // Check if keepalive policy is respected. + if t.lastPingAt.Add(t.kep.MinTime).After(now) { + t.pingStrikes++ + } + } + + if t.pingStrikes > maxPingStrikes { + // Send goaway and close the connection. + if logger.V(logLevel) { + logger.Errorf("transport: Got too many pings from the client, closing the connection.") + } + t.controlBuf.put(&goAway{code: http2.ErrCodeEnhanceYourCalm, debugData: []byte("too_many_pings"), closeConn: true}) + } +} + +func (t *http2Server) handleWindowUpdate(f *http2.WindowUpdateFrame) { + t.controlBuf.put(&incomingWindowUpdate{ + streamID: f.Header().StreamID, + increment: f.Increment, + }) +} + +func appendHeaderFieldsFromMD(headerFields []hpack.HeaderField, md metadata.MD) []hpack.HeaderField { + for k, vv := range md { + if isReservedHeader(k) { + // Clients don't tolerate reading restricted headers after some non restricted ones were sent. + continue + } + for _, v := range vv { + headerFields = append(headerFields, hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)}) + } + } + return headerFields +} + +func (t *http2Server) checkForHeaderListSize(it interface{}) bool { + if t.maxSendHeaderListSize == nil { + return true + } + hdrFrame := it.(*headerFrame) + var sz int64 + for _, f := range hdrFrame.hf { + if sz += int64(f.Size()); sz > int64(*t.maxSendHeaderListSize) { + if logger.V(logLevel) { + logger.Errorf("header list size to send violates the maximum size (%d bytes) set by client", *t.maxSendHeaderListSize) + } + return false + } + } + return true +} + +// WriteHeader sends the header metadata md back to the client. +func (t *http2Server) WriteHeader(s *Stream, md metadata.MD) error { + if s.updateHeaderSent() || s.getState() == streamDone { + return ErrIllegalHeaderWrite + } + s.hdrMu.Lock() + if md.Len() > 0 { + if s.header.Len() > 0 { + s.header = metadata.Join(s.header, md) + } else { + s.header = md + } + } + if err := t.writeHeaderLocked(s); err != nil { + s.hdrMu.Unlock() + return err + } + s.hdrMu.Unlock() + return nil +} + +func (t *http2Server) setResetPingStrikes() { + atomic.StoreUint32(&t.resetPingStrikes, 1) +} + +func (t *http2Server) writeHeaderLocked(s *Stream) error { + // TODO(mmukhi): Benchmark if the performance gets better if count the metadata and other header fields + // first and create a slice of that exact size. + headerFields := make([]hpack.HeaderField, 0, 2) // at least :status, content-type will be there if none else. + headerFields = append(headerFields, hpack.HeaderField{Name: ":status", Value: "200"}) + headerFields = append(headerFields, hpack.HeaderField{Name: "content-type", Value: grpcutil.ContentType(s.contentSubtype)}) + if s.sendCompress != "" { + headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-encoding", Value: s.sendCompress}) + } + headerFields = appendHeaderFieldsFromMD(headerFields, s.header) + success, err := t.controlBuf.executeAndPut(t.checkForHeaderListSize, &headerFrame{ + streamID: s.id, + hf: headerFields, + endStream: false, + onWrite: t.setResetPingStrikes, + }) + if !success { + if err != nil { + return err + } + t.closeStream(s, true, http2.ErrCodeInternal, false) + return ErrHeaderListSizeLimitViolation + } + if t.stats != nil { + // Note: Headers are compressed with hpack after this call returns. + // No WireLength field is set here. + outHeader := &stats.OutHeader{ + Header: s.header.Copy(), + Compression: s.sendCompress, + } + t.stats.HandleRPC(s.Context(), outHeader) + } + return nil +} + +// WriteStatus sends stream status to the client and terminates the stream. +// There is no further I/O operations being able to perform on this stream. +// TODO(zhaoq): Now it indicates the end of entire stream. Revisit if early +// OK is adopted. +func (t *http2Server) WriteStatus(s *Stream, st *status.Status) error { + if s.getState() == streamDone { + return nil + } + s.hdrMu.Lock() + // TODO(mmukhi): Benchmark if the performance gets better if count the metadata and other header fields + // first and create a slice of that exact size. + headerFields := make([]hpack.HeaderField, 0, 2) // grpc-status and grpc-message will be there if none else. + if !s.updateHeaderSent() { // No headers have been sent. + if len(s.header) > 0 { // Send a separate header frame. + if err := t.writeHeaderLocked(s); err != nil { + s.hdrMu.Unlock() + return err + } + } else { // Send a trailer only response. + headerFields = append(headerFields, hpack.HeaderField{Name: ":status", Value: "200"}) + headerFields = append(headerFields, hpack.HeaderField{Name: "content-type", Value: grpcutil.ContentType(s.contentSubtype)}) + } + } + headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-status", Value: strconv.Itoa(int(st.Code()))}) + headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-message", Value: encodeGrpcMessage(st.Message())}) + + if p := st.Proto(); p != nil && len(p.Details) > 0 { + stBytes, err := proto.Marshal(p) + if err != nil { + // TODO: return error instead, when callers are able to handle it. + logger.Errorf("transport: failed to marshal rpc status: %v, error: %v", p, err) + } else { + headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-status-details-bin", Value: encodeBinHeader(stBytes)}) + } + } + + // Attach the trailer metadata. + headerFields = appendHeaderFieldsFromMD(headerFields, s.trailer) + trailingHeader := &headerFrame{ + streamID: s.id, + hf: headerFields, + endStream: true, + onWrite: t.setResetPingStrikes, + } + s.hdrMu.Unlock() + success, err := t.controlBuf.execute(t.checkForHeaderListSize, trailingHeader) + if !success { + if err != nil { + return err + } + t.closeStream(s, true, http2.ErrCodeInternal, false) + return ErrHeaderListSizeLimitViolation + } + // Send a RST_STREAM after the trailers if the client has not already half-closed. + rst := s.getState() == streamActive + t.finishStream(s, rst, http2.ErrCodeNo, trailingHeader, true) + if t.stats != nil { + // Note: The trailer fields are compressed with hpack after this call returns. + // No WireLength field is set here. + t.stats.HandleRPC(s.Context(), &stats.OutTrailer{ + Trailer: s.trailer.Copy(), + }) + } + return nil +} + +// Write converts the data into HTTP2 data frame and sends it out. Non-nil error +// is returns if it fails (e.g., framing error, transport error). +func (t *http2Server) Write(s *Stream, hdr []byte, data []byte, opts *Options) error { + if !s.isHeaderSent() { // Headers haven't been written yet. + if err := t.WriteHeader(s, nil); err != nil { + if _, ok := err.(ConnectionError); ok { + return err + } + // TODO(mmukhi, dfawley): Make sure this is the right code to return. + return status.Errorf(codes.Internal, "transport: %v", err) + } + } else { + // Writing headers checks for this condition. + if s.getState() == streamDone { + // TODO(mmukhi, dfawley): Should the server write also return io.EOF? + s.cancel() + select { + case <-t.done: + return ErrConnClosing + default: + } + return ContextErr(s.ctx.Err()) + } + } + df := &dataFrame{ + streamID: s.id, + h: hdr, + d: data, + onEachWrite: t.setResetPingStrikes, + } + if err := s.wq.get(int32(len(hdr) + len(data))); err != nil { + select { + case <-t.done: + return ErrConnClosing + default: + } + return ContextErr(s.ctx.Err()) + } + return t.controlBuf.put(df) +} + +// keepalive running in a separate goroutine does the following: +// 1. Gracefully closes an idle connection after a duration of keepalive.MaxConnectionIdle. +// 2. Gracefully closes any connection after a duration of keepalive.MaxConnectionAge. +// 3. Forcibly closes a connection after an additive period of keepalive.MaxConnectionAgeGrace over keepalive.MaxConnectionAge. +// 4. Makes sure a connection is alive by sending pings with a frequency of keepalive.Time and closes a non-responsive connection +// after an additional duration of keepalive.Timeout. +func (t *http2Server) keepalive() { + p := &ping{} + // True iff a ping has been sent, and no data has been received since then. + outstandingPing := false + // Amount of time remaining before which we should receive an ACK for the + // last sent ping. + kpTimeoutLeft := time.Duration(0) + // Records the last value of t.lastRead before we go block on the timer. + // This is required to check for read activity since then. + prevNano := time.Now().UnixNano() + // Initialize the different timers to their default values. + idleTimer := time.NewTimer(t.kp.MaxConnectionIdle) + ageTimer := time.NewTimer(t.kp.MaxConnectionAge) + kpTimer := time.NewTimer(t.kp.Time) + defer func() { + // We need to drain the underlying channel in these timers after a call + // to Stop(), only if we are interested in resetting them. Clearly we + // are not interested in resetting them here. + idleTimer.Stop() + ageTimer.Stop() + kpTimer.Stop() + }() + + for { + select { + case <-idleTimer.C: + t.mu.Lock() + idle := t.idle + if idle.IsZero() { // The connection is non-idle. + t.mu.Unlock() + idleTimer.Reset(t.kp.MaxConnectionIdle) + continue + } + val := t.kp.MaxConnectionIdle - time.Since(idle) + t.mu.Unlock() + if val <= 0 { + // The connection has been idle for a duration of keepalive.MaxConnectionIdle or more. + // Gracefully close the connection. + t.drain(http2.ErrCodeNo, []byte{}) + return + } + idleTimer.Reset(val) + case <-ageTimer.C: + t.drain(http2.ErrCodeNo, []byte{}) + ageTimer.Reset(t.kp.MaxConnectionAgeGrace) + select { + case <-ageTimer.C: + // Close the connection after grace period. + if logger.V(logLevel) { + logger.Infof("transport: closing server transport due to maximum connection age.") + } + t.Close() + case <-t.done: + } + return + case <-kpTimer.C: + lastRead := atomic.LoadInt64(&t.lastRead) + if lastRead > prevNano { + // There has been read activity since the last time we were + // here. Setup the timer to fire at kp.Time seconds from + // lastRead time and continue. + outstandingPing = false + kpTimer.Reset(time.Duration(lastRead) + t.kp.Time - time.Duration(time.Now().UnixNano())) + prevNano = lastRead + continue + } + if outstandingPing && kpTimeoutLeft <= 0 { + if logger.V(logLevel) { + logger.Infof("transport: closing server transport due to idleness.") + } + t.Close() + return + } + if !outstandingPing { + if channelz.IsOn() { + atomic.AddInt64(&t.czData.kpCount, 1) + } + t.controlBuf.put(p) + kpTimeoutLeft = t.kp.Timeout + outstandingPing = true + } + // The amount of time to sleep here is the minimum of kp.Time and + // timeoutLeft. This will ensure that we wait only for kp.Time + // before sending out the next ping (for cases where the ping is + // acked). + sleepDuration := minTime(t.kp.Time, kpTimeoutLeft) + kpTimeoutLeft -= sleepDuration + kpTimer.Reset(sleepDuration) + case <-t.done: + return + } + } +} + +// Close starts shutting down the http2Server transport. +// TODO(zhaoq): Now the destruction is not blocked on any pending streams. This +// could cause some resource issue. Revisit this later. +func (t *http2Server) Close() error { + t.mu.Lock() + if t.state == closing { + t.mu.Unlock() + return errors.New("transport: Close() was already called") + } + t.state = closing + streams := t.activeStreams + t.activeStreams = nil + t.mu.Unlock() + t.controlBuf.finish() + close(t.done) + err := t.conn.Close() + if channelz.IsOn() { + channelz.RemoveEntry(t.channelzID) + } + // Cancel all active streams. + for _, s := range streams { + s.cancel() + } + if t.stats != nil { + connEnd := &stats.ConnEnd{} + t.stats.HandleConn(t.ctx, connEnd) + } + return err +} + +// deleteStream deletes the stream s from transport's active streams. +func (t *http2Server) deleteStream(s *Stream, eosReceived bool) { + // In case stream sending and receiving are invoked in separate + // goroutines (e.g., bi-directional streaming), cancel needs to be + // called to interrupt the potential blocking on other goroutines. + s.cancel() + + t.mu.Lock() + if _, ok := t.activeStreams[s.id]; ok { + delete(t.activeStreams, s.id) + if len(t.activeStreams) == 0 { + t.idle = time.Now() + } + } + t.mu.Unlock() + + if channelz.IsOn() { + if eosReceived { + atomic.AddInt64(&t.czData.streamsSucceeded, 1) + } else { + atomic.AddInt64(&t.czData.streamsFailed, 1) + } + } +} + +// finishStream closes the stream and puts the trailing headerFrame into controlbuf. +func (t *http2Server) finishStream(s *Stream, rst bool, rstCode http2.ErrCode, hdr *headerFrame, eosReceived bool) { + oldState := s.swapState(streamDone) + if oldState == streamDone { + // If the stream was already done, return. + return + } + + hdr.cleanup = &cleanupStream{ + streamID: s.id, + rst: rst, + rstCode: rstCode, + onWrite: func() { + t.deleteStream(s, eosReceived) + }, + } + t.controlBuf.put(hdr) +} + +// closeStream clears the footprint of a stream when the stream is not needed any more. +func (t *http2Server) closeStream(s *Stream, rst bool, rstCode http2.ErrCode, eosReceived bool) { + s.swapState(streamDone) + t.deleteStream(s, eosReceived) + + t.controlBuf.put(&cleanupStream{ + streamID: s.id, + rst: rst, + rstCode: rstCode, + onWrite: func() {}, + }) +} + +func (t *http2Server) RemoteAddr() net.Addr { + return t.remoteAddr +} + +func (t *http2Server) Drain() { + t.drain(http2.ErrCodeNo, []byte{}) +} + +func (t *http2Server) drain(code http2.ErrCode, debugData []byte) { + t.mu.Lock() + defer t.mu.Unlock() + if t.drainChan != nil { + return + } + t.drainChan = make(chan struct{}) + t.controlBuf.put(&goAway{code: code, debugData: debugData, headsUp: true}) +} + +var goAwayPing = &ping{data: [8]byte{1, 6, 1, 8, 0, 3, 3, 9}} + +// Handles outgoing GoAway and returns true if loopy needs to put itself +// in draining mode. +func (t *http2Server) outgoingGoAwayHandler(g *goAway) (bool, error) { + t.mu.Lock() + if t.state == closing { // TODO(mmukhi): This seems unnecessary. + t.mu.Unlock() + // The transport is closing. + return false, ErrConnClosing + } + sid := t.maxStreamID + if !g.headsUp { + // Stop accepting more streams now. + t.state = draining + if len(t.activeStreams) == 0 { + g.closeConn = true + } + t.mu.Unlock() + if err := t.framer.fr.WriteGoAway(sid, g.code, g.debugData); err != nil { + return false, err + } + if g.closeConn { + // Abruptly close the connection following the GoAway (via + // loopywriter). But flush out what's inside the buffer first. + t.framer.writer.Flush() + return false, fmt.Errorf("transport: Connection closing") + } + return true, nil + } + t.mu.Unlock() + // For a graceful close, send out a GoAway with stream ID of MaxUInt32, + // Follow that with a ping and wait for the ack to come back or a timer + // to expire. During this time accept new streams since they might have + // originated before the GoAway reaches the client. + // After getting the ack or timer expiration send out another GoAway this + // time with an ID of the max stream server intends to process. + if err := t.framer.fr.WriteGoAway(math.MaxUint32, http2.ErrCodeNo, []byte{}); err != nil { + return false, err + } + if err := t.framer.fr.WritePing(false, goAwayPing.data); err != nil { + return false, err + } + go func() { + timer := time.NewTimer(time.Minute) + defer timer.Stop() + select { + case <-t.drainChan: + case <-timer.C: + case <-t.done: + return + } + t.controlBuf.put(&goAway{code: g.code, debugData: g.debugData}) + }() + return false, nil +} + +func (t *http2Server) ChannelzMetric() *channelz.SocketInternalMetric { + s := channelz.SocketInternalMetric{ + StreamsStarted: atomic.LoadInt64(&t.czData.streamsStarted), + StreamsSucceeded: atomic.LoadInt64(&t.czData.streamsSucceeded), + StreamsFailed: atomic.LoadInt64(&t.czData.streamsFailed), + MessagesSent: atomic.LoadInt64(&t.czData.msgSent), + MessagesReceived: atomic.LoadInt64(&t.czData.msgRecv), + KeepAlivesSent: atomic.LoadInt64(&t.czData.kpCount), + LastRemoteStreamCreatedTimestamp: time.Unix(0, atomic.LoadInt64(&t.czData.lastStreamCreatedTime)), + LastMessageSentTimestamp: time.Unix(0, atomic.LoadInt64(&t.czData.lastMsgSentTime)), + LastMessageReceivedTimestamp: time.Unix(0, atomic.LoadInt64(&t.czData.lastMsgRecvTime)), + LocalFlowControlWindow: int64(t.fc.getSize()), + SocketOptions: channelz.GetSocketOption(t.conn), + LocalAddr: t.localAddr, + RemoteAddr: t.remoteAddr, + // RemoteName : + } + if au, ok := t.authInfo.(credentials.ChannelzSecurityInfo); ok { + s.Security = au.GetSecurityValue() + } + s.RemoteFlowControlWindow = t.getOutFlowWindow() + return &s +} + +func (t *http2Server) IncrMsgSent() { + atomic.AddInt64(&t.czData.msgSent, 1) + atomic.StoreInt64(&t.czData.lastMsgSentTime, time.Now().UnixNano()) +} + +func (t *http2Server) IncrMsgRecv() { + atomic.AddInt64(&t.czData.msgRecv, 1) + atomic.StoreInt64(&t.czData.lastMsgRecvTime, time.Now().UnixNano()) +} + +func (t *http2Server) getOutFlowWindow() int64 { + resp := make(chan uint32, 1) + timer := time.NewTimer(time.Second) + defer timer.Stop() + t.controlBuf.put(&outFlowControlSizeRequest{resp}) + select { + case sz := <-resp: + return int64(sz) + case <-t.done: + return -1 + case <-timer.C: + return -2 + } +} + +func getJitter(v time.Duration) time.Duration { + if v == infinity { + return 0 + } + // Generate a jitter between +/- 10% of the value. + r := int64(v / 10) + j := grpcrand.Int63n(2*r) - r + return time.Duration(j) +} diff --git a/vendor/google.golang.org/grpc/internal/transport/http_util.go b/vendor/google.golang.org/grpc/internal/transport/http_util.go new file mode 100644 index 000000000..4d15afbf7 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/transport/http_util.go @@ -0,0 +1,600 @@ +/* + * + * Copyright 2014 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package transport + +import ( + "bufio" + "bytes" + "encoding/base64" + "fmt" + "io" + "math" + "net" + "net/http" + "strconv" + "strings" + "time" + "unicode/utf8" + + "github.com/golang/protobuf/proto" + "golang.org/x/net/http2" + "golang.org/x/net/http2/hpack" + spb "google.golang.org/genproto/googleapis/rpc/status" + "google.golang.org/grpc/codes" + "google.golang.org/grpc/grpclog" + "google.golang.org/grpc/internal/grpcutil" + "google.golang.org/grpc/status" +) + +const ( + // http2MaxFrameLen specifies the max length of a HTTP2 frame. + http2MaxFrameLen = 16384 // 16KB frame + // http://http2.github.io/http2-spec/#SettingValues + http2InitHeaderTableSize = 4096 + // baseContentType is the base content-type for gRPC. This is a valid + // content-type on it's own, but can also include a content-subtype such as + // "proto" as a suffix after "+" or ";". See + // https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests + // for more details. + +) + +var ( + clientPreface = []byte(http2.ClientPreface) + http2ErrConvTab = map[http2.ErrCode]codes.Code{ + http2.ErrCodeNo: codes.Internal, + http2.ErrCodeProtocol: codes.Internal, + http2.ErrCodeInternal: codes.Internal, + http2.ErrCodeFlowControl: codes.ResourceExhausted, + http2.ErrCodeSettingsTimeout: codes.Internal, + http2.ErrCodeStreamClosed: codes.Internal, + http2.ErrCodeFrameSize: codes.Internal, + http2.ErrCodeRefusedStream: codes.Unavailable, + http2.ErrCodeCancel: codes.Canceled, + http2.ErrCodeCompression: codes.Internal, + http2.ErrCodeConnect: codes.Internal, + http2.ErrCodeEnhanceYourCalm: codes.ResourceExhausted, + http2.ErrCodeInadequateSecurity: codes.PermissionDenied, + http2.ErrCodeHTTP11Required: codes.Internal, + } + // HTTPStatusConvTab is the HTTP status code to gRPC error code conversion table. + HTTPStatusConvTab = map[int]codes.Code{ + // 400 Bad Request - INTERNAL. + http.StatusBadRequest: codes.Internal, + // 401 Unauthorized - UNAUTHENTICATED. + http.StatusUnauthorized: codes.Unauthenticated, + // 403 Forbidden - PERMISSION_DENIED. + http.StatusForbidden: codes.PermissionDenied, + // 404 Not Found - UNIMPLEMENTED. + http.StatusNotFound: codes.Unimplemented, + // 429 Too Many Requests - UNAVAILABLE. + http.StatusTooManyRequests: codes.Unavailable, + // 502 Bad Gateway - UNAVAILABLE. + http.StatusBadGateway: codes.Unavailable, + // 503 Service Unavailable - UNAVAILABLE. + http.StatusServiceUnavailable: codes.Unavailable, + // 504 Gateway timeout - UNAVAILABLE. + http.StatusGatewayTimeout: codes.Unavailable, + } + logger = grpclog.Component("transport") +) + +type parsedHeaderData struct { + encoding string + // statusGen caches the stream status received from the trailer the server + // sent. Client side only. Do not access directly. After all trailers are + // parsed, use the status method to retrieve the status. + statusGen *status.Status + // rawStatusCode and rawStatusMsg are set from the raw trailer fields and are not + // intended for direct access outside of parsing. + rawStatusCode *int + rawStatusMsg string + httpStatus *int + // Server side only fields. + timeoutSet bool + timeout time.Duration + method string + // key-value metadata map from the peer. + mdata map[string][]string + statsTags []byte + statsTrace []byte + contentSubtype string + + // isGRPC field indicates whether the peer is speaking gRPC (otherwise HTTP). + // + // We are in gRPC mode (peer speaking gRPC) if: + // * We are client side and have already received a HEADER frame that indicates gRPC peer. + // * The header contains valid a content-type, i.e. a string starts with "application/grpc" + // And we should handle error specific to gRPC. + // + // Otherwise (i.e. a content-type string starts without "application/grpc", or does not exist), we + // are in HTTP fallback mode, and should handle error specific to HTTP. + isGRPC bool + grpcErr error + httpErr error + contentTypeErr string +} + +// decodeState configures decoding criteria and records the decoded data. +type decodeState struct { + // whether decoding on server side or not + serverSide bool + + // Records the states during HPACK decoding. It will be filled with info parsed from HTTP HEADERS + // frame once decodeHeader function has been invoked and returned. + data parsedHeaderData +} + +// isReservedHeader checks whether hdr belongs to HTTP2 headers +// reserved by gRPC protocol. Any other headers are classified as the +// user-specified metadata. +func isReservedHeader(hdr string) bool { + if hdr != "" && hdr[0] == ':' { + return true + } + switch hdr { + case "content-type", + "user-agent", + "grpc-message-type", + "grpc-encoding", + "grpc-message", + "grpc-status", + "grpc-timeout", + "grpc-status-details-bin", + // Intentionally exclude grpc-previous-rpc-attempts and + // grpc-retry-pushback-ms, which are "reserved", but their API + // intentionally works via metadata. + "te": + return true + default: + return false + } +} + +// isWhitelistedHeader checks whether hdr should be propagated into metadata +// visible to users, even though it is classified as "reserved", above. +func isWhitelistedHeader(hdr string) bool { + switch hdr { + case ":authority", "user-agent": + return true + default: + return false + } +} + +func (d *decodeState) status() *status.Status { + if d.data.statusGen == nil { + // No status-details were provided; generate status using code/msg. + d.data.statusGen = status.New(codes.Code(int32(*(d.data.rawStatusCode))), d.data.rawStatusMsg) + } + return d.data.statusGen +} + +const binHdrSuffix = "-bin" + +func encodeBinHeader(v []byte) string { + return base64.RawStdEncoding.EncodeToString(v) +} + +func decodeBinHeader(v string) ([]byte, error) { + if len(v)%4 == 0 { + // Input was padded, or padding was not necessary. + return base64.StdEncoding.DecodeString(v) + } + return base64.RawStdEncoding.DecodeString(v) +} + +func encodeMetadataHeader(k, v string) string { + if strings.HasSuffix(k, binHdrSuffix) { + return encodeBinHeader(([]byte)(v)) + } + return v +} + +func decodeMetadataHeader(k, v string) (string, error) { + if strings.HasSuffix(k, binHdrSuffix) { + b, err := decodeBinHeader(v) + return string(b), err + } + return v, nil +} + +func (d *decodeState) decodeHeader(frame *http2.MetaHeadersFrame) (http2.ErrCode, error) { + // frame.Truncated is set to true when framer detects that the current header + // list size hits MaxHeaderListSize limit. + if frame.Truncated { + return http2.ErrCodeFrameSize, status.Error(codes.Internal, "peer header list size exceeded limit") + } + + for _, hf := range frame.Fields { + d.processHeaderField(hf) + } + + if d.data.isGRPC { + if d.data.grpcErr != nil { + return http2.ErrCodeProtocol, d.data.grpcErr + } + if d.serverSide { + return http2.ErrCodeNo, nil + } + if d.data.rawStatusCode == nil && d.data.statusGen == nil { + // gRPC status doesn't exist. + // Set rawStatusCode to be unknown and return nil error. + // So that, if the stream has ended this Unknown status + // will be propagated to the user. + // Otherwise, it will be ignored. In which case, status from + // a later trailer, that has StreamEnded flag set, is propagated. + code := int(codes.Unknown) + d.data.rawStatusCode = &code + } + return http2.ErrCodeNo, nil + } + + // HTTP fallback mode + if d.data.httpErr != nil { + return http2.ErrCodeProtocol, d.data.httpErr + } + + var ( + code = codes.Internal // when header does not include HTTP status, return INTERNAL + ok bool + ) + + if d.data.httpStatus != nil { + code, ok = HTTPStatusConvTab[*(d.data.httpStatus)] + if !ok { + code = codes.Unknown + } + } + + return http2.ErrCodeProtocol, status.Error(code, d.constructHTTPErrMsg()) +} + +// constructErrMsg constructs error message to be returned in HTTP fallback mode. +// Format: HTTP status code and its corresponding message + content-type error message. +func (d *decodeState) constructHTTPErrMsg() string { + var errMsgs []string + + if d.data.httpStatus == nil { + errMsgs = append(errMsgs, "malformed header: missing HTTP status") + } else { + errMsgs = append(errMsgs, fmt.Sprintf("%s: HTTP status code %d", http.StatusText(*(d.data.httpStatus)), *d.data.httpStatus)) + } + + if d.data.contentTypeErr == "" { + errMsgs = append(errMsgs, "transport: missing content-type field") + } else { + errMsgs = append(errMsgs, d.data.contentTypeErr) + } + + return strings.Join(errMsgs, "; ") +} + +func (d *decodeState) addMetadata(k, v string) { + if d.data.mdata == nil { + d.data.mdata = make(map[string][]string) + } + d.data.mdata[k] = append(d.data.mdata[k], v) +} + +func (d *decodeState) processHeaderField(f hpack.HeaderField) { + switch f.Name { + case "content-type": + contentSubtype, validContentType := grpcutil.ContentSubtype(f.Value) + if !validContentType { + d.data.contentTypeErr = fmt.Sprintf("transport: received the unexpected content-type %q", f.Value) + return + } + d.data.contentSubtype = contentSubtype + // TODO: do we want to propagate the whole content-type in the metadata, + // or come up with a way to just propagate the content-subtype if it was set? + // ie {"content-type": "application/grpc+proto"} or {"content-subtype": "proto"} + // in the metadata? + d.addMetadata(f.Name, f.Value) + d.data.isGRPC = true + case "grpc-encoding": + d.data.encoding = f.Value + case "grpc-status": + code, err := strconv.Atoi(f.Value) + if err != nil { + d.data.grpcErr = status.Errorf(codes.Internal, "transport: malformed grpc-status: %v", err) + return + } + d.data.rawStatusCode = &code + case "grpc-message": + d.data.rawStatusMsg = decodeGrpcMessage(f.Value) + case "grpc-status-details-bin": + v, err := decodeBinHeader(f.Value) + if err != nil { + d.data.grpcErr = status.Errorf(codes.Internal, "transport: malformed grpc-status-details-bin: %v", err) + return + } + s := &spb.Status{} + if err := proto.Unmarshal(v, s); err != nil { + d.data.grpcErr = status.Errorf(codes.Internal, "transport: malformed grpc-status-details-bin: %v", err) + return + } + d.data.statusGen = status.FromProto(s) + case "grpc-timeout": + d.data.timeoutSet = true + var err error + if d.data.timeout, err = decodeTimeout(f.Value); err != nil { + d.data.grpcErr = status.Errorf(codes.Internal, "transport: malformed time-out: %v", err) + } + case ":path": + d.data.method = f.Value + case ":status": + code, err := strconv.Atoi(f.Value) + if err != nil { + d.data.httpErr = status.Errorf(codes.Internal, "transport: malformed http-status: %v", err) + return + } + d.data.httpStatus = &code + case "grpc-tags-bin": + v, err := decodeBinHeader(f.Value) + if err != nil { + d.data.grpcErr = status.Errorf(codes.Internal, "transport: malformed grpc-tags-bin: %v", err) + return + } + d.data.statsTags = v + d.addMetadata(f.Name, string(v)) + case "grpc-trace-bin": + v, err := decodeBinHeader(f.Value) + if err != nil { + d.data.grpcErr = status.Errorf(codes.Internal, "transport: malformed grpc-trace-bin: %v", err) + return + } + d.data.statsTrace = v + d.addMetadata(f.Name, string(v)) + default: + if isReservedHeader(f.Name) && !isWhitelistedHeader(f.Name) { + break + } + v, err := decodeMetadataHeader(f.Name, f.Value) + if err != nil { + if logger.V(logLevel) { + logger.Errorf("Failed to decode metadata header (%q, %q): %v", f.Name, f.Value, err) + } + return + } + d.addMetadata(f.Name, v) + } +} + +type timeoutUnit uint8 + +const ( + hour timeoutUnit = 'H' + minute timeoutUnit = 'M' + second timeoutUnit = 'S' + millisecond timeoutUnit = 'm' + microsecond timeoutUnit = 'u' + nanosecond timeoutUnit = 'n' +) + +func timeoutUnitToDuration(u timeoutUnit) (d time.Duration, ok bool) { + switch u { + case hour: + return time.Hour, true + case minute: + return time.Minute, true + case second: + return time.Second, true + case millisecond: + return time.Millisecond, true + case microsecond: + return time.Microsecond, true + case nanosecond: + return time.Nanosecond, true + default: + } + return +} + +func decodeTimeout(s string) (time.Duration, error) { + size := len(s) + if size < 2 { + return 0, fmt.Errorf("transport: timeout string is too short: %q", s) + } + if size > 9 { + // Spec allows for 8 digits plus the unit. + return 0, fmt.Errorf("transport: timeout string is too long: %q", s) + } + unit := timeoutUnit(s[size-1]) + d, ok := timeoutUnitToDuration(unit) + if !ok { + return 0, fmt.Errorf("transport: timeout unit is not recognized: %q", s) + } + t, err := strconv.ParseInt(s[:size-1], 10, 64) + if err != nil { + return 0, err + } + const maxHours = math.MaxInt64 / int64(time.Hour) + if d == time.Hour && t > maxHours { + // This timeout would overflow math.MaxInt64; clamp it. + return time.Duration(math.MaxInt64), nil + } + return d * time.Duration(t), nil +} + +const ( + spaceByte = ' ' + tildeByte = '~' + percentByte = '%' +) + +// encodeGrpcMessage is used to encode status code in header field +// "grpc-message". It does percent encoding and also replaces invalid utf-8 +// characters with Unicode replacement character. +// +// It checks to see if each individual byte in msg is an allowable byte, and +// then either percent encoding or passing it through. When percent encoding, +// the byte is converted into hexadecimal notation with a '%' prepended. +func encodeGrpcMessage(msg string) string { + if msg == "" { + return "" + } + lenMsg := len(msg) + for i := 0; i < lenMsg; i++ { + c := msg[i] + if !(c >= spaceByte && c <= tildeByte && c != percentByte) { + return encodeGrpcMessageUnchecked(msg) + } + } + return msg +} + +func encodeGrpcMessageUnchecked(msg string) string { + var buf bytes.Buffer + for len(msg) > 0 { + r, size := utf8.DecodeRuneInString(msg) + for _, b := range []byte(string(r)) { + if size > 1 { + // If size > 1, r is not ascii. Always do percent encoding. + buf.WriteString(fmt.Sprintf("%%%02X", b)) + continue + } + + // The for loop is necessary even if size == 1. r could be + // utf8.RuneError. + // + // fmt.Sprintf("%%%02X", utf8.RuneError) gives "%FFFD". + if b >= spaceByte && b <= tildeByte && b != percentByte { + buf.WriteByte(b) + } else { + buf.WriteString(fmt.Sprintf("%%%02X", b)) + } + } + msg = msg[size:] + } + return buf.String() +} + +// decodeGrpcMessage decodes the msg encoded by encodeGrpcMessage. +func decodeGrpcMessage(msg string) string { + if msg == "" { + return "" + } + lenMsg := len(msg) + for i := 0; i < lenMsg; i++ { + if msg[i] == percentByte && i+2 < lenMsg { + return decodeGrpcMessageUnchecked(msg) + } + } + return msg +} + +func decodeGrpcMessageUnchecked(msg string) string { + var buf bytes.Buffer + lenMsg := len(msg) + for i := 0; i < lenMsg; i++ { + c := msg[i] + if c == percentByte && i+2 < lenMsg { + parsed, err := strconv.ParseUint(msg[i+1:i+3], 16, 8) + if err != nil { + buf.WriteByte(c) + } else { + buf.WriteByte(byte(parsed)) + i += 2 + } + } else { + buf.WriteByte(c) + } + } + return buf.String() +} + +type bufWriter struct { + buf []byte + offset int + batchSize int + conn net.Conn + err error + + onFlush func() +} + +func newBufWriter(conn net.Conn, batchSize int) *bufWriter { + return &bufWriter{ + buf: make([]byte, batchSize*2), + batchSize: batchSize, + conn: conn, + } +} + +func (w *bufWriter) Write(b []byte) (n int, err error) { + if w.err != nil { + return 0, w.err + } + if w.batchSize == 0 { // Buffer has been disabled. + return w.conn.Write(b) + } + for len(b) > 0 { + nn := copy(w.buf[w.offset:], b) + b = b[nn:] + w.offset += nn + n += nn + if w.offset >= w.batchSize { + err = w.Flush() + } + } + return n, err +} + +func (w *bufWriter) Flush() error { + if w.err != nil { + return w.err + } + if w.offset == 0 { + return nil + } + if w.onFlush != nil { + w.onFlush() + } + _, w.err = w.conn.Write(w.buf[:w.offset]) + w.offset = 0 + return w.err +} + +type framer struct { + writer *bufWriter + fr *http2.Framer +} + +func newFramer(conn net.Conn, writeBufferSize, readBufferSize int, maxHeaderListSize uint32) *framer { + if writeBufferSize < 0 { + writeBufferSize = 0 + } + var r io.Reader = conn + if readBufferSize > 0 { + r = bufio.NewReaderSize(r, readBufferSize) + } + w := newBufWriter(conn, writeBufferSize) + f := &framer{ + writer: w, + fr: http2.NewFramer(w, r), + } + f.fr.SetMaxReadFrameSize(http2MaxFrameLen) + // Opt-in to Frame reuse API on framer to reduce garbage. + // Frames aren't safe to read from after a subsequent call to ReadFrame. + f.fr.SetReuseFrames() + f.fr.MaxHeaderListSize = maxHeaderListSize + f.fr.ReadMetaHeaders = hpack.NewDecoder(http2InitHeaderTableSize, nil) + return f +} diff --git a/vendor/google.golang.org/grpc/internal/transport/transport.go b/vendor/google.golang.org/grpc/internal/transport/transport.go new file mode 100644 index 000000000..b74030a96 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/transport/transport.go @@ -0,0 +1,804 @@ +/* + * + * Copyright 2014 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package transport defines and implements message oriented communication +// channel to complete various transactions (e.g., an RPC). It is meant for +// grpc-internal usage and is not intended to be imported directly by users. +package transport + +import ( + "bytes" + "context" + "errors" + "fmt" + "io" + "net" + "sync" + "sync/atomic" + + "google.golang.org/grpc/codes" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/keepalive" + "google.golang.org/grpc/metadata" + "google.golang.org/grpc/resolver" + "google.golang.org/grpc/stats" + "google.golang.org/grpc/status" + "google.golang.org/grpc/tap" +) + +const logLevel = 2 + +type bufferPool struct { + pool sync.Pool +} + +func newBufferPool() *bufferPool { + return &bufferPool{ + pool: sync.Pool{ + New: func() interface{} { + return new(bytes.Buffer) + }, + }, + } +} + +func (p *bufferPool) get() *bytes.Buffer { + return p.pool.Get().(*bytes.Buffer) +} + +func (p *bufferPool) put(b *bytes.Buffer) { + p.pool.Put(b) +} + +// recvMsg represents the received msg from the transport. All transport +// protocol specific info has been removed. +type recvMsg struct { + buffer *bytes.Buffer + // nil: received some data + // io.EOF: stream is completed. data is nil. + // other non-nil error: transport failure. data is nil. + err error +} + +// recvBuffer is an unbounded channel of recvMsg structs. +// +// Note: recvBuffer differs from buffer.Unbounded only in the fact that it +// holds a channel of recvMsg structs instead of objects implementing "item" +// interface. recvBuffer is written to much more often and using strict recvMsg +// structs helps avoid allocation in "recvBuffer.put" +type recvBuffer struct { + c chan recvMsg + mu sync.Mutex + backlog []recvMsg + err error +} + +func newRecvBuffer() *recvBuffer { + b := &recvBuffer{ + c: make(chan recvMsg, 1), + } + return b +} + +func (b *recvBuffer) put(r recvMsg) { + b.mu.Lock() + if b.err != nil { + b.mu.Unlock() + // An error had occurred earlier, don't accept more + // data or errors. + return + } + b.err = r.err + if len(b.backlog) == 0 { + select { + case b.c <- r: + b.mu.Unlock() + return + default: + } + } + b.backlog = append(b.backlog, r) + b.mu.Unlock() +} + +func (b *recvBuffer) load() { + b.mu.Lock() + if len(b.backlog) > 0 { + select { + case b.c <- b.backlog[0]: + b.backlog[0] = recvMsg{} + b.backlog = b.backlog[1:] + default: + } + } + b.mu.Unlock() +} + +// get returns the channel that receives a recvMsg in the buffer. +// +// Upon receipt of a recvMsg, the caller should call load to send another +// recvMsg onto the channel if there is any. +func (b *recvBuffer) get() <-chan recvMsg { + return b.c +} + +// recvBufferReader implements io.Reader interface to read the data from +// recvBuffer. +type recvBufferReader struct { + closeStream func(error) // Closes the client transport stream with the given error and nil trailer metadata. + ctx context.Context + ctxDone <-chan struct{} // cache of ctx.Done() (for performance). + recv *recvBuffer + last *bytes.Buffer // Stores the remaining data in the previous calls. + err error + freeBuffer func(*bytes.Buffer) +} + +// Read reads the next len(p) bytes from last. If last is drained, it tries to +// read additional data from recv. It blocks if there no additional data available +// in recv. If Read returns any non-nil error, it will continue to return that error. +func (r *recvBufferReader) Read(p []byte) (n int, err error) { + if r.err != nil { + return 0, r.err + } + if r.last != nil { + // Read remaining data left in last call. + copied, _ := r.last.Read(p) + if r.last.Len() == 0 { + r.freeBuffer(r.last) + r.last = nil + } + return copied, nil + } + if r.closeStream != nil { + n, r.err = r.readClient(p) + } else { + n, r.err = r.read(p) + } + return n, r.err +} + +func (r *recvBufferReader) read(p []byte) (n int, err error) { + select { + case <-r.ctxDone: + return 0, ContextErr(r.ctx.Err()) + case m := <-r.recv.get(): + return r.readAdditional(m, p) + } +} + +func (r *recvBufferReader) readClient(p []byte) (n int, err error) { + // If the context is canceled, then closes the stream with nil metadata. + // closeStream writes its error parameter to r.recv as a recvMsg. + // r.readAdditional acts on that message and returns the necessary error. + select { + case <-r.ctxDone: + // Note that this adds the ctx error to the end of recv buffer, and + // reads from the head. This will delay the error until recv buffer is + // empty, thus will delay ctx cancellation in Recv(). + // + // It's done this way to fix a race between ctx cancel and trailer. The + // race was, stream.Recv() may return ctx error if ctxDone wins the + // race, but stream.Trailer() may return a non-nil md because the stream + // was not marked as done when trailer is received. This closeStream + // call will mark stream as done, thus fix the race. + // + // TODO: delaying ctx error seems like a unnecessary side effect. What + // we really want is to mark the stream as done, and return ctx error + // faster. + r.closeStream(ContextErr(r.ctx.Err())) + m := <-r.recv.get() + return r.readAdditional(m, p) + case m := <-r.recv.get(): + return r.readAdditional(m, p) + } +} + +func (r *recvBufferReader) readAdditional(m recvMsg, p []byte) (n int, err error) { + r.recv.load() + if m.err != nil { + return 0, m.err + } + copied, _ := m.buffer.Read(p) + if m.buffer.Len() == 0 { + r.freeBuffer(m.buffer) + r.last = nil + } else { + r.last = m.buffer + } + return copied, nil +} + +type streamState uint32 + +const ( + streamActive streamState = iota + streamWriteDone // EndStream sent + streamReadDone // EndStream received + streamDone // the entire stream is finished. +) + +// Stream represents an RPC in the transport layer. +type Stream struct { + id uint32 + st ServerTransport // nil for client side Stream + ct *http2Client // nil for server side Stream + ctx context.Context // the associated context of the stream + cancel context.CancelFunc // always nil for client side Stream + done chan struct{} // closed at the end of stream to unblock writers. On the client side. + ctxDone <-chan struct{} // same as done chan but for server side. Cache of ctx.Done() (for performance) + method string // the associated RPC method of the stream + recvCompress string + sendCompress string + buf *recvBuffer + trReader io.Reader + fc *inFlow + wq *writeQuota + + // Callback to state application's intentions to read data. This + // is used to adjust flow control, if needed. + requestRead func(int) + + headerChan chan struct{} // closed to indicate the end of header metadata. + headerChanClosed uint32 // set when headerChan is closed. Used to avoid closing headerChan multiple times. + // headerValid indicates whether a valid header was received. Only + // meaningful after headerChan is closed (always call waitOnHeader() before + // reading its value). Not valid on server side. + headerValid bool + + // hdrMu protects header and trailer metadata on the server-side. + hdrMu sync.Mutex + // On client side, header keeps the received header metadata. + // + // On server side, header keeps the header set by SetHeader(). The complete + // header will merged into this after t.WriteHeader() is called. + header metadata.MD + trailer metadata.MD // the key-value map of trailer metadata. + + noHeaders bool // set if the client never received headers (set only after the stream is done). + + // On the server-side, headerSent is atomically set to 1 when the headers are sent out. + headerSent uint32 + + state streamState + + // On client-side it is the status error received from the server. + // On server-side it is unused. + status *status.Status + + bytesReceived uint32 // indicates whether any bytes have been received on this stream + unprocessed uint32 // set if the server sends a refused stream or GOAWAY including this stream + + // contentSubtype is the content-subtype for requests. + // this must be lowercase or the behavior is undefined. + contentSubtype string +} + +// isHeaderSent is only valid on the server-side. +func (s *Stream) isHeaderSent() bool { + return atomic.LoadUint32(&s.headerSent) == 1 +} + +// updateHeaderSent updates headerSent and returns true +// if it was alreay set. It is valid only on server-side. +func (s *Stream) updateHeaderSent() bool { + return atomic.SwapUint32(&s.headerSent, 1) == 1 +} + +func (s *Stream) swapState(st streamState) streamState { + return streamState(atomic.SwapUint32((*uint32)(&s.state), uint32(st))) +} + +func (s *Stream) compareAndSwapState(oldState, newState streamState) bool { + return atomic.CompareAndSwapUint32((*uint32)(&s.state), uint32(oldState), uint32(newState)) +} + +func (s *Stream) getState() streamState { + return streamState(atomic.LoadUint32((*uint32)(&s.state))) +} + +func (s *Stream) waitOnHeader() { + if s.headerChan == nil { + // On the server headerChan is always nil since a stream originates + // only after having received headers. + return + } + select { + case <-s.ctx.Done(): + // Close the stream to prevent headers/trailers from changing after + // this function returns. + s.ct.CloseStream(s, ContextErr(s.ctx.Err())) + // headerChan could possibly not be closed yet if closeStream raced + // with operateHeaders; wait until it is closed explicitly here. + <-s.headerChan + case <-s.headerChan: + } +} + +// RecvCompress returns the compression algorithm applied to the inbound +// message. It is empty string if there is no compression applied. +func (s *Stream) RecvCompress() string { + s.waitOnHeader() + return s.recvCompress +} + +// SetSendCompress sets the compression algorithm to the stream. +func (s *Stream) SetSendCompress(str string) { + s.sendCompress = str +} + +// Done returns a channel which is closed when it receives the final status +// from the server. +func (s *Stream) Done() <-chan struct{} { + return s.done +} + +// Header returns the header metadata of the stream. +// +// On client side, it acquires the key-value pairs of header metadata once it is +// available. It blocks until i) the metadata is ready or ii) there is no header +// metadata or iii) the stream is canceled/expired. +// +// On server side, it returns the out header after t.WriteHeader is called. It +// does not block and must not be called until after WriteHeader. +func (s *Stream) Header() (metadata.MD, error) { + if s.headerChan == nil { + // On server side, return the header in stream. It will be the out + // header after t.WriteHeader is called. + return s.header.Copy(), nil + } + s.waitOnHeader() + if !s.headerValid { + return nil, s.status.Err() + } + return s.header.Copy(), nil +} + +// TrailersOnly blocks until a header or trailers-only frame is received and +// then returns true if the stream was trailers-only. If the stream ends +// before headers are received, returns true, nil. Client-side only. +func (s *Stream) TrailersOnly() bool { + s.waitOnHeader() + return s.noHeaders +} + +// Trailer returns the cached trailer metedata. Note that if it is not called +// after the entire stream is done, it could return an empty MD. Client +// side only. +// It can be safely read only after stream has ended that is either read +// or write have returned io.EOF. +func (s *Stream) Trailer() metadata.MD { + c := s.trailer.Copy() + return c +} + +// ContentSubtype returns the content-subtype for a request. For example, a +// content-subtype of "proto" will result in a content-type of +// "application/grpc+proto". This will always be lowercase. See +// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests for +// more details. +func (s *Stream) ContentSubtype() string { + return s.contentSubtype +} + +// Context returns the context of the stream. +func (s *Stream) Context() context.Context { + return s.ctx +} + +// Method returns the method for the stream. +func (s *Stream) Method() string { + return s.method +} + +// Status returns the status received from the server. +// Status can be read safely only after the stream has ended, +// that is, after Done() is closed. +func (s *Stream) Status() *status.Status { + return s.status +} + +// SetHeader sets the header metadata. This can be called multiple times. +// Server side only. +// This should not be called in parallel to other data writes. +func (s *Stream) SetHeader(md metadata.MD) error { + if md.Len() == 0 { + return nil + } + if s.isHeaderSent() || s.getState() == streamDone { + return ErrIllegalHeaderWrite + } + s.hdrMu.Lock() + s.header = metadata.Join(s.header, md) + s.hdrMu.Unlock() + return nil +} + +// SendHeader sends the given header metadata. The given metadata is +// combined with any metadata set by previous calls to SetHeader and +// then written to the transport stream. +func (s *Stream) SendHeader(md metadata.MD) error { + return s.st.WriteHeader(s, md) +} + +// SetTrailer sets the trailer metadata which will be sent with the RPC status +// by the server. This can be called multiple times. Server side only. +// This should not be called parallel to other data writes. +func (s *Stream) SetTrailer(md metadata.MD) error { + if md.Len() == 0 { + return nil + } + if s.getState() == streamDone { + return ErrIllegalHeaderWrite + } + s.hdrMu.Lock() + s.trailer = metadata.Join(s.trailer, md) + s.hdrMu.Unlock() + return nil +} + +func (s *Stream) write(m recvMsg) { + s.buf.put(m) +} + +// Read reads all p bytes from the wire for this stream. +func (s *Stream) Read(p []byte) (n int, err error) { + // Don't request a read if there was an error earlier + if er := s.trReader.(*transportReader).er; er != nil { + return 0, er + } + s.requestRead(len(p)) + return io.ReadFull(s.trReader, p) +} + +// tranportReader reads all the data available for this Stream from the transport and +// passes them into the decoder, which converts them into a gRPC message stream. +// The error is io.EOF when the stream is done or another non-nil error if +// the stream broke. +type transportReader struct { + reader io.Reader + // The handler to control the window update procedure for both this + // particular stream and the associated transport. + windowHandler func(int) + er error +} + +func (t *transportReader) Read(p []byte) (n int, err error) { + n, err = t.reader.Read(p) + if err != nil { + t.er = err + return + } + t.windowHandler(n) + return +} + +// BytesReceived indicates whether any bytes have been received on this stream. +func (s *Stream) BytesReceived() bool { + return atomic.LoadUint32(&s.bytesReceived) == 1 +} + +// Unprocessed indicates whether the server did not process this stream -- +// i.e. it sent a refused stream or GOAWAY including this stream ID. +func (s *Stream) Unprocessed() bool { + return atomic.LoadUint32(&s.unprocessed) == 1 +} + +// GoString is implemented by Stream so context.String() won't +// race when printing %#v. +func (s *Stream) GoString() string { + return fmt.Sprintf("", s, s.method) +} + +// state of transport +type transportState int + +const ( + reachable transportState = iota + closing + draining +) + +// ServerConfig consists of all the configurations to establish a server transport. +type ServerConfig struct { + MaxStreams uint32 + AuthInfo credentials.AuthInfo + InTapHandle tap.ServerInHandle + StatsHandler stats.Handler + KeepaliveParams keepalive.ServerParameters + KeepalivePolicy keepalive.EnforcementPolicy + InitialWindowSize int32 + InitialConnWindowSize int32 + WriteBufferSize int + ReadBufferSize int + ChannelzParentID int64 + MaxHeaderListSize *uint32 + HeaderTableSize *uint32 +} + +// NewServerTransport creates a ServerTransport with conn or non-nil error +// if it fails. +func NewServerTransport(protocol string, conn net.Conn, config *ServerConfig) (ServerTransport, error) { + return newHTTP2Server(conn, config) +} + +// ConnectOptions covers all relevant options for communicating with the server. +type ConnectOptions struct { + // UserAgent is the application user agent. + UserAgent string + // Dialer specifies how to dial a network address. + Dialer func(context.Context, string) (net.Conn, error) + // FailOnNonTempDialError specifies if gRPC fails on non-temporary dial errors. + FailOnNonTempDialError bool + // PerRPCCredentials stores the PerRPCCredentials required to issue RPCs. + PerRPCCredentials []credentials.PerRPCCredentials + // TransportCredentials stores the Authenticator required to setup a client + // connection. Only one of TransportCredentials and CredsBundle is non-nil. + TransportCredentials credentials.TransportCredentials + // CredsBundle is the credentials bundle to be used. Only one of + // TransportCredentials and CredsBundle is non-nil. + CredsBundle credentials.Bundle + // KeepaliveParams stores the keepalive parameters. + KeepaliveParams keepalive.ClientParameters + // StatsHandler stores the handler for stats. + StatsHandler stats.Handler + // InitialWindowSize sets the initial window size for a stream. + InitialWindowSize int32 + // InitialConnWindowSize sets the initial window size for a connection. + InitialConnWindowSize int32 + // WriteBufferSize sets the size of write buffer which in turn determines how much data can be batched before it's written on the wire. + WriteBufferSize int + // ReadBufferSize sets the size of read buffer, which in turn determines how much data can be read at most for one read syscall. + ReadBufferSize int + // ChannelzParentID sets the addrConn id which initiate the creation of this client transport. + ChannelzParentID int64 + // MaxHeaderListSize sets the max (uncompressed) size of header list that is prepared to be received. + MaxHeaderListSize *uint32 +} + +// NewClientTransport establishes the transport with the required ConnectOptions +// and returns it to the caller. +func NewClientTransport(connectCtx, ctx context.Context, addr resolver.Address, opts ConnectOptions, onPrefaceReceipt func(), onGoAway func(GoAwayReason), onClose func()) (ClientTransport, error) { + return newHTTP2Client(connectCtx, ctx, addr, opts, onPrefaceReceipt, onGoAway, onClose) +} + +// Options provides additional hints and information for message +// transmission. +type Options struct { + // Last indicates whether this write is the last piece for + // this stream. + Last bool +} + +// CallHdr carries the information of a particular RPC. +type CallHdr struct { + // Host specifies the peer's host. + Host string + + // Method specifies the operation to perform. + Method string + + // SendCompress specifies the compression algorithm applied on + // outbound message. + SendCompress string + + // Creds specifies credentials.PerRPCCredentials for a call. + Creds credentials.PerRPCCredentials + + // ContentSubtype specifies the content-subtype for a request. For example, a + // content-subtype of "proto" will result in a content-type of + // "application/grpc+proto". The value of ContentSubtype must be all + // lowercase, otherwise the behavior is undefined. See + // https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests + // for more details. + ContentSubtype string + + PreviousAttempts int // value of grpc-previous-rpc-attempts header to set +} + +// ClientTransport is the common interface for all gRPC client-side transport +// implementations. +type ClientTransport interface { + // Close tears down this transport. Once it returns, the transport + // should not be accessed any more. The caller must make sure this + // is called only once. + Close() error + + // GracefulClose starts to tear down the transport: the transport will stop + // accepting new RPCs and NewStream will return error. Once all streams are + // finished, the transport will close. + // + // It does not block. + GracefulClose() + + // Write sends the data for the given stream. A nil stream indicates + // the write is to be performed on the transport as a whole. + Write(s *Stream, hdr []byte, data []byte, opts *Options) error + + // NewStream creates a Stream for an RPC. + NewStream(ctx context.Context, callHdr *CallHdr) (*Stream, error) + + // CloseStream clears the footprint of a stream when the stream is + // not needed any more. The err indicates the error incurred when + // CloseStream is called. Must be called when a stream is finished + // unless the associated transport is closing. + CloseStream(stream *Stream, err error) + + // Error returns a channel that is closed when some I/O error + // happens. Typically the caller should have a goroutine to monitor + // this in order to take action (e.g., close the current transport + // and create a new one) in error case. It should not return nil + // once the transport is initiated. + Error() <-chan struct{} + + // GoAway returns a channel that is closed when ClientTransport + // receives the draining signal from the server (e.g., GOAWAY frame in + // HTTP/2). + GoAway() <-chan struct{} + + // GetGoAwayReason returns the reason why GoAway frame was received. + GetGoAwayReason() GoAwayReason + + // RemoteAddr returns the remote network address. + RemoteAddr() net.Addr + + // IncrMsgSent increments the number of message sent through this transport. + IncrMsgSent() + + // IncrMsgRecv increments the number of message received through this transport. + IncrMsgRecv() +} + +// ServerTransport is the common interface for all gRPC server-side transport +// implementations. +// +// Methods may be called concurrently from multiple goroutines, but +// Write methods for a given Stream will be called serially. +type ServerTransport interface { + // HandleStreams receives incoming streams using the given handler. + HandleStreams(func(*Stream), func(context.Context, string) context.Context) + + // WriteHeader sends the header metadata for the given stream. + // WriteHeader may not be called on all streams. + WriteHeader(s *Stream, md metadata.MD) error + + // Write sends the data for the given stream. + // Write may not be called on all streams. + Write(s *Stream, hdr []byte, data []byte, opts *Options) error + + // WriteStatus sends the status of a stream to the client. WriteStatus is + // the final call made on a stream and always occurs. + WriteStatus(s *Stream, st *status.Status) error + + // Close tears down the transport. Once it is called, the transport + // should not be accessed any more. All the pending streams and their + // handlers will be terminated asynchronously. + Close() error + + // RemoteAddr returns the remote network address. + RemoteAddr() net.Addr + + // Drain notifies the client this ServerTransport stops accepting new RPCs. + Drain() + + // IncrMsgSent increments the number of message sent through this transport. + IncrMsgSent() + + // IncrMsgRecv increments the number of message received through this transport. + IncrMsgRecv() +} + +// connectionErrorf creates an ConnectionError with the specified error description. +func connectionErrorf(temp bool, e error, format string, a ...interface{}) ConnectionError { + return ConnectionError{ + Desc: fmt.Sprintf(format, a...), + temp: temp, + err: e, + } +} + +// ConnectionError is an error that results in the termination of the +// entire connection and the retry of all the active streams. +type ConnectionError struct { + Desc string + temp bool + err error +} + +func (e ConnectionError) Error() string { + return fmt.Sprintf("connection error: desc = %q", e.Desc) +} + +// Temporary indicates if this connection error is temporary or fatal. +func (e ConnectionError) Temporary() bool { + return e.temp +} + +// Origin returns the original error of this connection error. +func (e ConnectionError) Origin() error { + // Never return nil error here. + // If the original error is nil, return itself. + if e.err == nil { + return e + } + return e.err +} + +var ( + // ErrConnClosing indicates that the transport is closing. + ErrConnClosing = connectionErrorf(true, nil, "transport is closing") + // errStreamDrain indicates that the stream is rejected because the + // connection is draining. This could be caused by goaway or balancer + // removing the address. + errStreamDrain = status.Error(codes.Unavailable, "the connection is draining") + // errStreamDone is returned from write at the client side to indiacte application + // layer of an error. + errStreamDone = errors.New("the stream is done") + // StatusGoAway indicates that the server sent a GOAWAY that included this + // stream's ID in unprocessed RPCs. + statusGoAway = status.New(codes.Unavailable, "the stream is rejected because server is draining the connection") +) + +// GoAwayReason contains the reason for the GoAway frame received. +type GoAwayReason uint8 + +const ( + // GoAwayInvalid indicates that no GoAway frame is received. + GoAwayInvalid GoAwayReason = 0 + // GoAwayNoReason is the default value when GoAway frame is received. + GoAwayNoReason GoAwayReason = 1 + // GoAwayTooManyPings indicates that a GoAway frame with + // ErrCodeEnhanceYourCalm was received and that the debug data said + // "too_many_pings". + GoAwayTooManyPings GoAwayReason = 2 +) + +// channelzData is used to store channelz related data for http2Client and http2Server. +// These fields cannot be embedded in the original structs (e.g. http2Client), since to do atomic +// operation on int64 variable on 32-bit machine, user is responsible to enforce memory alignment. +// Here, by grouping those int64 fields inside a struct, we are enforcing the alignment. +type channelzData struct { + kpCount int64 + // The number of streams that have started, including already finished ones. + streamsStarted int64 + // Client side: The number of streams that have ended successfully by receiving + // EoS bit set frame from server. + // Server side: The number of streams that have ended successfully by sending + // frame with EoS bit set. + streamsSucceeded int64 + streamsFailed int64 + // lastStreamCreatedTime stores the timestamp that the last stream gets created. It is of int64 type + // instead of time.Time since it's more costly to atomically update time.Time variable than int64 + // variable. The same goes for lastMsgSentTime and lastMsgRecvTime. + lastStreamCreatedTime int64 + msgSent int64 + msgRecv int64 + lastMsgSentTime int64 + lastMsgRecvTime int64 +} + +// ContextErr converts the error from context package into a status error. +func ContextErr(err error) error { + switch err { + case context.DeadlineExceeded: + return status.Error(codes.DeadlineExceeded, err.Error()) + case context.Canceled: + return status.Error(codes.Canceled, err.Error()) + } + return status.Errorf(codes.Internal, "Unexpected error from context packet: %v", err) +} diff --git a/vendor/google.golang.org/grpc/keepalive/keepalive.go b/vendor/google.golang.org/grpc/keepalive/keepalive.go new file mode 100644 index 000000000..34d31b5e7 --- /dev/null +++ b/vendor/google.golang.org/grpc/keepalive/keepalive.go @@ -0,0 +1,85 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package keepalive defines configurable parameters for point-to-point +// healthcheck. +package keepalive + +import ( + "time" +) + +// ClientParameters is used to set keepalive parameters on the client-side. +// These configure how the client will actively probe to notice when a +// connection is broken and send pings so intermediaries will be aware of the +// liveness of the connection. Make sure these parameters are set in +// coordination with the keepalive policy on the server, as incompatible +// settings can result in closing of connection. +type ClientParameters struct { + // After a duration of this time if the client doesn't see any activity it + // pings the server to see if the transport is still alive. + // If set below 10s, a minimum value of 10s will be used instead. + Time time.Duration // The current default value is infinity. + // After having pinged for keepalive check, the client waits for a duration + // of Timeout and if no activity is seen even after that the connection is + // closed. + Timeout time.Duration // The current default value is 20 seconds. + // If true, client sends keepalive pings even with no active RPCs. If false, + // when there are no active RPCs, Time and Timeout will be ignored and no + // keepalive pings will be sent. + PermitWithoutStream bool // false by default. +} + +// ServerParameters is used to set keepalive and max-age parameters on the +// server-side. +type ServerParameters struct { + // MaxConnectionIdle is a duration for the amount of time after which an + // idle connection would be closed by sending a GoAway. Idleness duration is + // defined since the most recent time the number of outstanding RPCs became + // zero or the connection establishment. + MaxConnectionIdle time.Duration // The current default value is infinity. + // MaxConnectionAge is a duration for the maximum amount of time a + // connection may exist before it will be closed by sending a GoAway. A + // random jitter of +/-10% will be added to MaxConnectionAge to spread out + // connection storms. + MaxConnectionAge time.Duration // The current default value is infinity. + // MaxConnectionAgeGrace is an additive period after MaxConnectionAge after + // which the connection will be forcibly closed. + MaxConnectionAgeGrace time.Duration // The current default value is infinity. + // After a duration of this time if the server doesn't see any activity it + // pings the client to see if the transport is still alive. + // If set below 1s, a minimum value of 1s will be used instead. + Time time.Duration // The current default value is 2 hours. + // After having pinged for keepalive check, the server waits for a duration + // of Timeout and if no activity is seen even after that the connection is + // closed. + Timeout time.Duration // The current default value is 20 seconds. +} + +// EnforcementPolicy is used to set keepalive enforcement policy on the +// server-side. Server will close connection with a client that violates this +// policy. +type EnforcementPolicy struct { + // MinTime is the minimum amount of time a client should wait before sending + // a keepalive ping. + MinTime time.Duration // The current default value is 5 minutes. + // If true, server allows keepalive pings even when there are no active + // streams(RPCs). If false, and client sends ping when there are no active + // streams, server will send GOAWAY and close the connection. + PermitWithoutStream bool // false by default. +} diff --git a/vendor/google.golang.org/grpc/metadata/metadata.go b/vendor/google.golang.org/grpc/metadata/metadata.go new file mode 100644 index 000000000..cf6d1b947 --- /dev/null +++ b/vendor/google.golang.org/grpc/metadata/metadata.go @@ -0,0 +1,209 @@ +/* + * + * Copyright 2014 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package metadata define the structure of the metadata supported by gRPC library. +// Please refer to https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md +// for more information about custom-metadata. +package metadata // import "google.golang.org/grpc/metadata" + +import ( + "context" + "fmt" + "strings" +) + +// DecodeKeyValue returns k, v, nil. +// +// Deprecated: use k and v directly instead. +func DecodeKeyValue(k, v string) (string, string, error) { + return k, v, nil +} + +// MD is a mapping from metadata keys to values. Users should use the following +// two convenience functions New and Pairs to generate MD. +type MD map[string][]string + +// New creates an MD from a given key-value map. +// +// Only the following ASCII characters are allowed in keys: +// - digits: 0-9 +// - uppercase letters: A-Z (normalized to lower) +// - lowercase letters: a-z +// - special characters: -_. +// Uppercase letters are automatically converted to lowercase. +// +// Keys beginning with "grpc-" are reserved for grpc-internal use only and may +// result in errors if set in metadata. +func New(m map[string]string) MD { + md := MD{} + for k, val := range m { + key := strings.ToLower(k) + md[key] = append(md[key], val) + } + return md +} + +// Pairs returns an MD formed by the mapping of key, value ... +// Pairs panics if len(kv) is odd. +// +// Only the following ASCII characters are allowed in keys: +// - digits: 0-9 +// - uppercase letters: A-Z (normalized to lower) +// - lowercase letters: a-z +// - special characters: -_. +// Uppercase letters are automatically converted to lowercase. +// +// Keys beginning with "grpc-" are reserved for grpc-internal use only and may +// result in errors if set in metadata. +func Pairs(kv ...string) MD { + if len(kv)%2 == 1 { + panic(fmt.Sprintf("metadata: Pairs got the odd number of input pairs for metadata: %d", len(kv))) + } + md := MD{} + var key string + for i, s := range kv { + if i%2 == 0 { + key = strings.ToLower(s) + continue + } + md[key] = append(md[key], s) + } + return md +} + +// Len returns the number of items in md. +func (md MD) Len() int { + return len(md) +} + +// Copy returns a copy of md. +func (md MD) Copy() MD { + return Join(md) +} + +// Get obtains the values for a given key. +func (md MD) Get(k string) []string { + k = strings.ToLower(k) + return md[k] +} + +// Set sets the value of a given key with a slice of values. +func (md MD) Set(k string, vals ...string) { + if len(vals) == 0 { + return + } + k = strings.ToLower(k) + md[k] = vals +} + +// Append adds the values to key k, not overwriting what was already stored at that key. +func (md MD) Append(k string, vals ...string) { + if len(vals) == 0 { + return + } + k = strings.ToLower(k) + md[k] = append(md[k], vals...) +} + +// Join joins any number of mds into a single MD. +// The order of values for each key is determined by the order in which +// the mds containing those values are presented to Join. +func Join(mds ...MD) MD { + out := MD{} + for _, md := range mds { + for k, v := range md { + out[k] = append(out[k], v...) + } + } + return out +} + +type mdIncomingKey struct{} +type mdOutgoingKey struct{} + +// NewIncomingContext creates a new context with incoming md attached. +func NewIncomingContext(ctx context.Context, md MD) context.Context { + return context.WithValue(ctx, mdIncomingKey{}, md) +} + +// NewOutgoingContext creates a new context with outgoing md attached. If used +// in conjunction with AppendToOutgoingContext, NewOutgoingContext will +// overwrite any previously-appended metadata. +func NewOutgoingContext(ctx context.Context, md MD) context.Context { + return context.WithValue(ctx, mdOutgoingKey{}, rawMD{md: md}) +} + +// AppendToOutgoingContext returns a new context with the provided kv merged +// with any existing metadata in the context. Please refer to the +// documentation of Pairs for a description of kv. +func AppendToOutgoingContext(ctx context.Context, kv ...string) context.Context { + if len(kv)%2 == 1 { + panic(fmt.Sprintf("metadata: AppendToOutgoingContext got an odd number of input pairs for metadata: %d", len(kv))) + } + md, _ := ctx.Value(mdOutgoingKey{}).(rawMD) + added := make([][]string, len(md.added)+1) + copy(added, md.added) + added[len(added)-1] = make([]string, len(kv)) + copy(added[len(added)-1], kv) + return context.WithValue(ctx, mdOutgoingKey{}, rawMD{md: md.md, added: added}) +} + +// FromIncomingContext returns the incoming metadata in ctx if it exists. The +// returned MD should not be modified. Writing to it may cause races. +// Modification should be made to copies of the returned MD. +func FromIncomingContext(ctx context.Context) (md MD, ok bool) { + md, ok = ctx.Value(mdIncomingKey{}).(MD) + return +} + +// FromOutgoingContextRaw returns the un-merged, intermediary contents +// of rawMD. Remember to perform strings.ToLower on the keys. The returned +// MD should not be modified. Writing to it may cause races. Modification +// should be made to copies of the returned MD. +// +// This is intended for gRPC-internal use ONLY. +func FromOutgoingContextRaw(ctx context.Context) (MD, [][]string, bool) { + raw, ok := ctx.Value(mdOutgoingKey{}).(rawMD) + if !ok { + return nil, nil, false + } + + return raw.md, raw.added, true +} + +// FromOutgoingContext returns the outgoing metadata in ctx if it exists. The +// returned MD should not be modified. Writing to it may cause races. +// Modification should be made to copies of the returned MD. +func FromOutgoingContext(ctx context.Context) (MD, bool) { + raw, ok := ctx.Value(mdOutgoingKey{}).(rawMD) + if !ok { + return nil, false + } + + mds := make([]MD, 0, len(raw.added)+1) + mds = append(mds, raw.md) + for _, vv := range raw.added { + mds = append(mds, Pairs(vv...)) + } + return Join(mds...), ok +} + +type rawMD struct { + md MD + added [][]string +} diff --git a/vendor/google.golang.org/grpc/peer/peer.go b/vendor/google.golang.org/grpc/peer/peer.go new file mode 100644 index 000000000..e01d219ff --- /dev/null +++ b/vendor/google.golang.org/grpc/peer/peer.go @@ -0,0 +1,51 @@ +/* + * + * Copyright 2014 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package peer defines various peer information associated with RPCs and +// corresponding utils. +package peer + +import ( + "context" + "net" + + "google.golang.org/grpc/credentials" +) + +// Peer contains the information of the peer for an RPC, such as the address +// and authentication information. +type Peer struct { + // Addr is the peer address. + Addr net.Addr + // AuthInfo is the authentication information of the transport. + // It is nil if there is no transport security being used. + AuthInfo credentials.AuthInfo +} + +type peerKey struct{} + +// NewContext creates a new context with peer information attached. +func NewContext(ctx context.Context, p *Peer) context.Context { + return context.WithValue(ctx, peerKey{}, p) +} + +// FromContext returns the peer information in ctx if it exists. +func FromContext(ctx context.Context) (p *Peer, ok bool) { + p, ok = ctx.Value(peerKey{}).(*Peer) + return +} diff --git a/vendor/google.golang.org/grpc/picker_wrapper.go b/vendor/google.golang.org/grpc/picker_wrapper.go new file mode 100644 index 000000000..a58174b6f --- /dev/null +++ b/vendor/google.golang.org/grpc/picker_wrapper.go @@ -0,0 +1,177 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpc + +import ( + "context" + "io" + "sync" + + "google.golang.org/grpc/balancer" + "google.golang.org/grpc/codes" + "google.golang.org/grpc/internal/channelz" + "google.golang.org/grpc/internal/transport" + "google.golang.org/grpc/status" +) + +// pickerWrapper is a wrapper of balancer.Picker. It blocks on certain pick +// actions and unblock when there's a picker update. +type pickerWrapper struct { + mu sync.Mutex + done bool + blockingCh chan struct{} + picker balancer.Picker +} + +func newPickerWrapper() *pickerWrapper { + return &pickerWrapper{blockingCh: make(chan struct{})} +} + +// updatePicker is called by UpdateBalancerState. It unblocks all blocked pick. +func (pw *pickerWrapper) updatePicker(p balancer.Picker) { + pw.mu.Lock() + if pw.done { + pw.mu.Unlock() + return + } + pw.picker = p + // pw.blockingCh should never be nil. + close(pw.blockingCh) + pw.blockingCh = make(chan struct{}) + pw.mu.Unlock() +} + +func doneChannelzWrapper(acw *acBalancerWrapper, done func(balancer.DoneInfo)) func(balancer.DoneInfo) { + acw.mu.Lock() + ac := acw.ac + acw.mu.Unlock() + ac.incrCallsStarted() + return func(b balancer.DoneInfo) { + if b.Err != nil && b.Err != io.EOF { + ac.incrCallsFailed() + } else { + ac.incrCallsSucceeded() + } + if done != nil { + done(b) + } + } +} + +// pick returns the transport that will be used for the RPC. +// It may block in the following cases: +// - there's no picker +// - the current picker returns ErrNoSubConnAvailable +// - the current picker returns other errors and failfast is false. +// - the subConn returned by the current picker is not READY +// When one of these situations happens, pick blocks until the picker gets updated. +func (pw *pickerWrapper) pick(ctx context.Context, failfast bool, info balancer.PickInfo) (transport.ClientTransport, func(balancer.DoneInfo), error) { + var ch chan struct{} + + var lastPickErr error + for { + pw.mu.Lock() + if pw.done { + pw.mu.Unlock() + return nil, nil, ErrClientConnClosing + } + + if pw.picker == nil { + ch = pw.blockingCh + } + if ch == pw.blockingCh { + // This could happen when either: + // - pw.picker is nil (the previous if condition), or + // - has called pick on the current picker. + pw.mu.Unlock() + select { + case <-ctx.Done(): + var errStr string + if lastPickErr != nil { + errStr = "latest balancer error: " + lastPickErr.Error() + } else { + errStr = ctx.Err().Error() + } + switch ctx.Err() { + case context.DeadlineExceeded: + return nil, nil, status.Error(codes.DeadlineExceeded, errStr) + case context.Canceled: + return nil, nil, status.Error(codes.Canceled, errStr) + } + case <-ch: + } + continue + } + + ch = pw.blockingCh + p := pw.picker + pw.mu.Unlock() + + pickResult, err := p.Pick(info) + + if err != nil { + if err == balancer.ErrNoSubConnAvailable { + continue + } + if _, ok := status.FromError(err); ok { + // Status error: end the RPC unconditionally with this status. + return nil, nil, err + } + // For all other errors, wait for ready RPCs should block and other + // RPCs should fail with unavailable. + if !failfast { + lastPickErr = err + continue + } + return nil, nil, status.Error(codes.Unavailable, err.Error()) + } + + acw, ok := pickResult.SubConn.(*acBalancerWrapper) + if !ok { + logger.Error("subconn returned from pick is not *acBalancerWrapper") + continue + } + if t, ok := acw.getAddrConn().getReadyTransport(); ok { + if channelz.IsOn() { + return t, doneChannelzWrapper(acw, pickResult.Done), nil + } + return t, pickResult.Done, nil + } + if pickResult.Done != nil { + // Calling done with nil error, no bytes sent and no bytes received. + // DoneInfo with default value works. + pickResult.Done(balancer.DoneInfo{}) + } + logger.Infof("blockingPicker: the picked transport is not ready, loop back to repick") + // If ok == false, ac.state is not READY. + // A valid picker always returns READY subConn. This means the state of ac + // just changed, and picker will be updated shortly. + // continue back to the beginning of the for loop to repick. + } +} + +func (pw *pickerWrapper) close() { + pw.mu.Lock() + defer pw.mu.Unlock() + if pw.done { + return + } + pw.done = true + close(pw.blockingCh) +} diff --git a/vendor/google.golang.org/grpc/pickfirst.go b/vendor/google.golang.org/grpc/pickfirst.go new file mode 100644 index 000000000..56e33f6c7 --- /dev/null +++ b/vendor/google.golang.org/grpc/pickfirst.go @@ -0,0 +1,136 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpc + +import ( + "errors" + "fmt" + + "google.golang.org/grpc/balancer" + "google.golang.org/grpc/connectivity" +) + +// PickFirstBalancerName is the name of the pick_first balancer. +const PickFirstBalancerName = "pick_first" + +func newPickfirstBuilder() balancer.Builder { + return &pickfirstBuilder{} +} + +type pickfirstBuilder struct{} + +func (*pickfirstBuilder) Build(cc balancer.ClientConn, opt balancer.BuildOptions) balancer.Balancer { + return &pickfirstBalancer{cc: cc} +} + +func (*pickfirstBuilder) Name() string { + return PickFirstBalancerName +} + +type pickfirstBalancer struct { + state connectivity.State + cc balancer.ClientConn + sc balancer.SubConn +} + +func (b *pickfirstBalancer) ResolverError(err error) { + switch b.state { + case connectivity.TransientFailure, connectivity.Idle, connectivity.Connecting: + // Set a failing picker if we don't have a good picker. + b.cc.UpdateState(balancer.State{ConnectivityState: connectivity.TransientFailure, + Picker: &picker{err: fmt.Errorf("name resolver error: %v", err)}, + }) + } + if logger.V(2) { + logger.Infof("pickfirstBalancer: ResolverError called with error %v", err) + } +} + +func (b *pickfirstBalancer) UpdateClientConnState(cs balancer.ClientConnState) error { + if len(cs.ResolverState.Addresses) == 0 { + b.ResolverError(errors.New("produced zero addresses")) + return balancer.ErrBadResolverState + } + if b.sc == nil { + var err error + b.sc, err = b.cc.NewSubConn(cs.ResolverState.Addresses, balancer.NewSubConnOptions{}) + if err != nil { + if logger.V(2) { + logger.Errorf("pickfirstBalancer: failed to NewSubConn: %v", err) + } + b.state = connectivity.TransientFailure + b.cc.UpdateState(balancer.State{ConnectivityState: connectivity.TransientFailure, + Picker: &picker{err: fmt.Errorf("error creating connection: %v", err)}, + }) + return balancer.ErrBadResolverState + } + b.state = connectivity.Idle + b.cc.UpdateState(balancer.State{ConnectivityState: connectivity.Idle, Picker: &picker{result: balancer.PickResult{SubConn: b.sc}}}) + b.sc.Connect() + } else { + b.sc.UpdateAddresses(cs.ResolverState.Addresses) + b.sc.Connect() + } + return nil +} + +func (b *pickfirstBalancer) UpdateSubConnState(sc balancer.SubConn, s balancer.SubConnState) { + if logger.V(2) { + logger.Infof("pickfirstBalancer: UpdateSubConnState: %p, %v", sc, s) + } + if b.sc != sc { + if logger.V(2) { + logger.Infof("pickfirstBalancer: ignored state change because sc is not recognized") + } + return + } + b.state = s.ConnectivityState + if s.ConnectivityState == connectivity.Shutdown { + b.sc = nil + return + } + + switch s.ConnectivityState { + case connectivity.Ready, connectivity.Idle: + b.cc.UpdateState(balancer.State{ConnectivityState: s.ConnectivityState, Picker: &picker{result: balancer.PickResult{SubConn: sc}}}) + case connectivity.Connecting: + b.cc.UpdateState(balancer.State{ConnectivityState: s.ConnectivityState, Picker: &picker{err: balancer.ErrNoSubConnAvailable}}) + case connectivity.TransientFailure: + b.cc.UpdateState(balancer.State{ + ConnectivityState: s.ConnectivityState, + Picker: &picker{err: s.ConnectionError}, + }) + } +} + +func (b *pickfirstBalancer) Close() { +} + +type picker struct { + result balancer.PickResult + err error +} + +func (p *picker) Pick(info balancer.PickInfo) (balancer.PickResult, error) { + return p.result, p.err +} + +func init() { + balancer.Register(newPickfirstBuilder()) +} diff --git a/vendor/google.golang.org/grpc/preloader.go b/vendor/google.golang.org/grpc/preloader.go new file mode 100644 index 000000000..0a1e975ad --- /dev/null +++ b/vendor/google.golang.org/grpc/preloader.go @@ -0,0 +1,67 @@ +/* + * + * Copyright 2019 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpc + +import ( + "google.golang.org/grpc/codes" + "google.golang.org/grpc/status" +) + +// PreparedMsg is responsible for creating a Marshalled and Compressed object. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type PreparedMsg struct { + // Struct for preparing msg before sending them + encodedData []byte + hdr []byte + payload []byte +} + +// Encode marshalls and compresses the message using the codec and compressor for the stream. +func (p *PreparedMsg) Encode(s Stream, msg interface{}) error { + ctx := s.Context() + rpcInfo, ok := rpcInfoFromContext(ctx) + if !ok { + return status.Errorf(codes.Internal, "grpc: unable to get rpcInfo") + } + + // check if the context has the relevant information to prepareMsg + if rpcInfo.preloaderInfo == nil { + return status.Errorf(codes.Internal, "grpc: rpcInfo.preloaderInfo is nil") + } + if rpcInfo.preloaderInfo.codec == nil { + return status.Errorf(codes.Internal, "grpc: rpcInfo.preloaderInfo.codec is nil") + } + + // prepare the msg + data, err := encode(rpcInfo.preloaderInfo.codec, msg) + if err != nil { + return err + } + p.encodedData = data + compData, err := compress(data, rpcInfo.preloaderInfo.cp, rpcInfo.preloaderInfo.comp) + if err != nil { + return err + } + p.hdr, p.payload = msgHeader(data, compData) + return nil +} diff --git a/vendor/google.golang.org/grpc/proxy.go b/vendor/google.golang.org/grpc/proxy.go new file mode 100644 index 000000000..f8f69bfb7 --- /dev/null +++ b/vendor/google.golang.org/grpc/proxy.go @@ -0,0 +1,152 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpc + +import ( + "bufio" + "context" + "encoding/base64" + "errors" + "fmt" + "io" + "net" + "net/http" + "net/http/httputil" + "net/url" +) + +const proxyAuthHeaderKey = "Proxy-Authorization" + +var ( + // errDisabled indicates that proxy is disabled for the address. + errDisabled = errors.New("proxy is disabled for the address") + // The following variable will be overwritten in the tests. + httpProxyFromEnvironment = http.ProxyFromEnvironment +) + +func mapAddress(ctx context.Context, address string) (*url.URL, error) { + req := &http.Request{ + URL: &url.URL{ + Scheme: "https", + Host: address, + }, + } + url, err := httpProxyFromEnvironment(req) + if err != nil { + return nil, err + } + if url == nil { + return nil, errDisabled + } + return url, nil +} + +// To read a response from a net.Conn, http.ReadResponse() takes a bufio.Reader. +// It's possible that this reader reads more than what's need for the response and stores +// those bytes in the buffer. +// bufConn wraps the original net.Conn and the bufio.Reader to make sure we don't lose the +// bytes in the buffer. +type bufConn struct { + net.Conn + r io.Reader +} + +func (c *bufConn) Read(b []byte) (int, error) { + return c.r.Read(b) +} + +func basicAuth(username, password string) string { + auth := username + ":" + password + return base64.StdEncoding.EncodeToString([]byte(auth)) +} + +func doHTTPConnectHandshake(ctx context.Context, conn net.Conn, backendAddr string, proxyURL *url.URL) (_ net.Conn, err error) { + defer func() { + if err != nil { + conn.Close() + } + }() + + req := &http.Request{ + Method: http.MethodConnect, + URL: &url.URL{Host: backendAddr}, + Header: map[string][]string{"User-Agent": {grpcUA}}, + } + if t := proxyURL.User; t != nil { + u := t.Username() + p, _ := t.Password() + req.Header.Add(proxyAuthHeaderKey, "Basic "+basicAuth(u, p)) + } + + if err := sendHTTPRequest(ctx, req, conn); err != nil { + return nil, fmt.Errorf("failed to write the HTTP request: %v", err) + } + + r := bufio.NewReader(conn) + resp, err := http.ReadResponse(r, req) + if err != nil { + return nil, fmt.Errorf("reading server HTTP response: %v", err) + } + defer resp.Body.Close() + if resp.StatusCode != http.StatusOK { + dump, err := httputil.DumpResponse(resp, true) + if err != nil { + return nil, fmt.Errorf("failed to do connect handshake, status code: %s", resp.Status) + } + return nil, fmt.Errorf("failed to do connect handshake, response: %q", dump) + } + + return &bufConn{Conn: conn, r: r}, nil +} + +// newProxyDialer returns a dialer that connects to proxy first if necessary. +// The returned dialer checks if a proxy is necessary, dial to the proxy with the +// provided dialer, does HTTP CONNECT handshake and returns the connection. +func newProxyDialer(dialer func(context.Context, string) (net.Conn, error)) func(context.Context, string) (net.Conn, error) { + return func(ctx context.Context, addr string) (conn net.Conn, err error) { + var newAddr string + proxyURL, err := mapAddress(ctx, addr) + if err != nil { + if err != errDisabled { + return nil, err + } + newAddr = addr + } else { + newAddr = proxyURL.Host + } + + conn, err = dialer(ctx, newAddr) + if err != nil { + return + } + if proxyURL != nil { + // proxy is disabled if proxyURL is nil. + conn, err = doHTTPConnectHandshake(ctx, conn, addr, proxyURL) + } + return + } +} + +func sendHTTPRequest(ctx context.Context, req *http.Request, conn net.Conn) error { + req = req.WithContext(ctx) + if err := req.Write(conn); err != nil { + return fmt.Errorf("failed to write the HTTP request: %v", err) + } + return nil +} diff --git a/vendor/google.golang.org/grpc/regenerate.sh b/vendor/google.golang.org/grpc/regenerate.sh new file mode 100644 index 000000000..3443ad975 --- /dev/null +++ b/vendor/google.golang.org/grpc/regenerate.sh @@ -0,0 +1,139 @@ +#!/bin/bash +# Copyright 2020 gRPC authors. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +set -eu -o pipefail + +WORKDIR=$(mktemp -d) + +function finish { + rm -rf "$WORKDIR" +} +trap finish EXIT + +export GOBIN=${WORKDIR}/bin +export PATH=${GOBIN}:${PATH} +mkdir -p ${GOBIN} + +echo "remove existing generated files" +# grpc_testingv3/testv3.pb.go is not re-generated because it was +# intentionally generated by an older version of protoc-gen-go. +rm -f $(find . -name '*.pb.go' | grep -v 'grpc_testingv3/testv3.pb.go') + +echo "go install google.golang.org/protobuf/cmd/protoc-gen-go" +(cd test/tools && go install google.golang.org/protobuf/cmd/protoc-gen-go) + +echo "go install cmd/protoc-gen-go-grpc" +(cd cmd/protoc-gen-go-grpc && go install .) + +echo "git clone https://github.com/grpc/grpc-proto" +git clone --quiet https://github.com/grpc/grpc-proto ${WORKDIR}/grpc-proto + +# Pull in code.proto as a proto dependency +mkdir -p ${WORKDIR}/googleapis/google/rpc +echo "curl https://raw.githubusercontent.com/googleapis/googleapis/master/google/rpc/code.proto" +curl --silent https://raw.githubusercontent.com/googleapis/googleapis/master/google/rpc/code.proto > ${WORKDIR}/googleapis/google/rpc/code.proto + +# Pull in the following repos to build the MeshCA config proto. +ENVOY_API_REPOS=( + "https://github.com/envoyproxy/data-plane-api" + "https://github.com/cncf/udpa" + "https://github.com/envoyproxy/protoc-gen-validate" +) +for repo in ${ENVOY_API_REPOS[@]}; do + dirname=$(basename ${repo}) + mkdir -p ${WORKDIR}/${dirname} + echo "git clone ${repo}" + git clone --quiet ${repo} ${WORKDIR}/${dirname} +done + +# Pull in the MeshCA service proto. +mkdir -p ${WORKDIR}/istio/istio/google/security/meshca/v1 +echo "curl https://raw.githubusercontent.com/istio/istio/master/security/proto/providers/google/meshca.proto" +curl --silent https://raw.githubusercontent.com/istio/istio/master/security/proto/providers/google/meshca.proto > ${WORKDIR}/istio/istio/google/security/meshca/v1/meshca.proto + +mkdir -p ${WORKDIR}/out + +# Generates sources without the embed requirement +LEGACY_SOURCES=( + ${WORKDIR}/grpc-proto/grpc/binlog/v1/binarylog.proto + ${WORKDIR}/grpc-proto/grpc/channelz/v1/channelz.proto + ${WORKDIR}/grpc-proto/grpc/health/v1/health.proto + ${WORKDIR}/grpc-proto/grpc/lb/v1/load_balancer.proto + profiling/proto/service.proto + reflection/grpc_reflection_v1alpha/reflection.proto +) + +# Generates only the new gRPC Service symbols +SOURCES=( + $(git ls-files --exclude-standard --cached --others "*.proto" | grep -v '^\(profiling/proto/service.proto\|reflection/grpc_reflection_v1alpha/reflection.proto\)$') + ${WORKDIR}/grpc-proto/grpc/gcp/altscontext.proto + ${WORKDIR}/grpc-proto/grpc/gcp/handshaker.proto + ${WORKDIR}/grpc-proto/grpc/gcp/transport_security_common.proto + ${WORKDIR}/grpc-proto/grpc/lookup/v1/rls.proto + ${WORKDIR}/grpc-proto/grpc/lookup/v1/rls_config.proto + ${WORKDIR}/grpc-proto/grpc/service_config/service_config.proto + ${WORKDIR}/grpc-proto/grpc/tls/provider/meshca/experimental/config.proto + ${WORKDIR}/istio/istio/google/security/meshca/v1/meshca.proto +) + +# These options of the form 'Mfoo.proto=bar' instruct the codegen to use an +# import path of 'bar' in the generated code when 'foo.proto' is imported in +# one of the sources. +OPTS=Mgrpc/service_config/service_config.proto=/internal/proto/grpc_service_config,\ +Menvoy/config/core/v3/config_source.proto=github.com/envoyproxy/go-control-plane/envoy/config/core/v3 + +for src in ${SOURCES[@]}; do + echo "protoc ${src}" + protoc --go_out=${OPTS}:${WORKDIR}/out --go-grpc_out=${OPTS}:${WORKDIR}/out \ + -I"." \ + -I${WORKDIR}/grpc-proto \ + -I${WORKDIR}/googleapis \ + -I${WORKDIR}/data-plane-api \ + -I${WORKDIR}/udpa \ + -I${WORKDIR}/protoc-gen-validate \ + -I${WORKDIR}/istio \ + ${src} +done + +for src in ${LEGACY_SOURCES[@]}; do + echo "protoc ${src}" + protoc --go_out=${OPTS}:${WORKDIR}/out --go-grpc_out=${OPTS},require_unimplemented_servers=false:${WORKDIR}/out \ + -I"." \ + -I${WORKDIR}/grpc-proto \ + -I${WORKDIR}/googleapis \ + -I${WORKDIR}/data-plane-api \ + -I${WORKDIR}/udpa \ + -I${WORKDIR}/protoc-gen-validate \ + -I${WORKDIR}/istio \ + ${src} +done + +# The go_package option in grpc/lookup/v1/rls.proto doesn't match the +# current location. Move it into the right place. +mkdir -p ${WORKDIR}/out/google.golang.org/grpc/balancer/rls/internal/proto/grpc_lookup_v1 +mv ${WORKDIR}/out/google.golang.org/grpc/lookup/grpc_lookup_v1/* ${WORKDIR}/out/google.golang.org/grpc/balancer/rls/internal/proto/grpc_lookup_v1 + +# grpc_testingv3/testv3.pb.go is not re-generated because it was +# intentionally generated by an older version of protoc-gen-go. +rm ${WORKDIR}/out/google.golang.org/grpc/reflection/grpc_testingv3/*.pb.go + +# grpc/service_config/service_config.proto does not have a go_package option. +mv ${WORKDIR}/out/grpc/service_config/service_config.pb.go internal/proto/grpc_service_config + +# istio/google/security/meshca/v1/meshca.proto does not have a go_package option. +mkdir -p ${WORKDIR}/out/google.golang.org/grpc/credentials/tls/certprovider/meshca/internal/v1/ +mv ${WORKDIR}/out/istio/google/security/meshca/v1/* ${WORKDIR}/out/google.golang.org/grpc/credentials/tls/certprovider/meshca/internal/v1/ + +cp -R ${WORKDIR}/out/google.golang.org/grpc/* . diff --git a/vendor/google.golang.org/grpc/resolver/resolver.go b/vendor/google.golang.org/grpc/resolver/resolver.go new file mode 100644 index 000000000..e9fa8e33d --- /dev/null +++ b/vendor/google.golang.org/grpc/resolver/resolver.go @@ -0,0 +1,260 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package resolver defines APIs for name resolution in gRPC. +// All APIs in this package are experimental. +package resolver + +import ( + "context" + "net" + + "google.golang.org/grpc/attributes" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/serviceconfig" +) + +var ( + // m is a map from scheme to resolver builder. + m = make(map[string]Builder) + // defaultScheme is the default scheme to use. + defaultScheme = "passthrough" +) + +// TODO(bar) install dns resolver in init(){}. + +// Register registers the resolver builder to the resolver map. b.Scheme will be +// used as the scheme registered with this builder. +// +// NOTE: this function must only be called during initialization time (i.e. in +// an init() function), and is not thread-safe. If multiple Resolvers are +// registered with the same name, the one registered last will take effect. +func Register(b Builder) { + m[b.Scheme()] = b +} + +// Get returns the resolver builder registered with the given scheme. +// +// If no builder is register with the scheme, nil will be returned. +func Get(scheme string) Builder { + if b, ok := m[scheme]; ok { + return b + } + return nil +} + +// SetDefaultScheme sets the default scheme that will be used. The default +// default scheme is "passthrough". +// +// NOTE: this function must only be called during initialization time (i.e. in +// an init() function), and is not thread-safe. The scheme set last overrides +// previously set values. +func SetDefaultScheme(scheme string) { + defaultScheme = scheme +} + +// GetDefaultScheme gets the default scheme that will be used. +func GetDefaultScheme() string { + return defaultScheme +} + +// AddressType indicates the address type returned by name resolution. +// +// Deprecated: use Attributes in Address instead. +type AddressType uint8 + +const ( + // Backend indicates the address is for a backend server. + // + // Deprecated: use Attributes in Address instead. + Backend AddressType = iota + // GRPCLB indicates the address is for a grpclb load balancer. + // + // Deprecated: to select the GRPCLB load balancing policy, use a service + // config with a corresponding loadBalancingConfig. To supply balancer + // addresses to the GRPCLB load balancing policy, set State.Attributes + // using balancer/grpclb/state.Set. + GRPCLB +) + +// Address represents a server the client connects to. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type Address struct { + // Addr is the server address on which a connection will be established. + Addr string + + // ServerName is the name of this address. + // If non-empty, the ServerName is used as the transport certification authority for + // the address, instead of the hostname from the Dial target string. In most cases, + // this should not be set. + // + // If Type is GRPCLB, ServerName should be the name of the remote load + // balancer, not the name of the backend. + // + // WARNING: ServerName must only be populated with trusted values. It + // is insecure to populate it with data from untrusted inputs since untrusted + // values could be used to bypass the authority checks performed by TLS. + ServerName string + + // Attributes contains arbitrary data about this address intended for + // consumption by the load balancing policy. + Attributes *attributes.Attributes + + // Type is the type of this address. + // + // Deprecated: use Attributes instead. + Type AddressType + + // Metadata is the information associated with Addr, which may be used + // to make load balancing decision. + // + // Deprecated: use Attributes instead. + Metadata interface{} +} + +// BuildOptions includes additional information for the builder to create +// the resolver. +type BuildOptions struct { + // DisableServiceConfig indicates whether a resolver implementation should + // fetch service config data. + DisableServiceConfig bool + // DialCreds is the transport credentials used by the ClientConn for + // communicating with the target gRPC service (set via + // WithTransportCredentials). In cases where a name resolution service + // requires the same credentials, the resolver may use this field. In most + // cases though, it is not appropriate, and this field may be ignored. + DialCreds credentials.TransportCredentials + // CredsBundle is the credentials bundle used by the ClientConn for + // communicating with the target gRPC service (set via + // WithCredentialsBundle). In cases where a name resolution service + // requires the same credentials, the resolver may use this field. In most + // cases though, it is not appropriate, and this field may be ignored. + CredsBundle credentials.Bundle + // Dialer is the custom dialer used by the ClientConn for dialling the + // target gRPC service (set via WithDialer). In cases where a name + // resolution service requires the same dialer, the resolver may use this + // field. In most cases though, it is not appropriate, and this field may + // be ignored. + Dialer func(context.Context, string) (net.Conn, error) +} + +// State contains the current Resolver state relevant to the ClientConn. +type State struct { + // Addresses is the latest set of resolved addresses for the target. + Addresses []Address + + // ServiceConfig contains the result from parsing the latest service + // config. If it is nil, it indicates no service config is present or the + // resolver does not provide service configs. + ServiceConfig *serviceconfig.ParseResult + + // Attributes contains arbitrary data about the resolver intended for + // consumption by the load balancing policy. + Attributes *attributes.Attributes +} + +// ClientConn contains the callbacks for resolver to notify any updates +// to the gRPC ClientConn. +// +// This interface is to be implemented by gRPC. Users should not need a +// brand new implementation of this interface. For the situations like +// testing, the new implementation should embed this interface. This allows +// gRPC to add new methods to this interface. +type ClientConn interface { + // UpdateState updates the state of the ClientConn appropriately. + UpdateState(State) + // ReportError notifies the ClientConn that the Resolver encountered an + // error. The ClientConn will notify the load balancer and begin calling + // ResolveNow on the Resolver with exponential backoff. + ReportError(error) + // NewAddress is called by resolver to notify ClientConn a new list + // of resolved addresses. + // The address list should be the complete list of resolved addresses. + // + // Deprecated: Use UpdateState instead. + NewAddress(addresses []Address) + // NewServiceConfig is called by resolver to notify ClientConn a new + // service config. The service config should be provided as a json string. + // + // Deprecated: Use UpdateState instead. + NewServiceConfig(serviceConfig string) + // ParseServiceConfig parses the provided service config and returns an + // object that provides the parsed config. + ParseServiceConfig(serviceConfigJSON string) *serviceconfig.ParseResult +} + +// Target represents a target for gRPC, as specified in: +// https://github.com/grpc/grpc/blob/master/doc/naming.md. +// It is parsed from the target string that gets passed into Dial or DialContext by the user. And +// grpc passes it to the resolver and the balancer. +// +// If the target follows the naming spec, and the parsed scheme is registered with grpc, we will +// parse the target string according to the spec. e.g. "dns://some_authority/foo.bar" will be parsed +// into &Target{Scheme: "dns", Authority: "some_authority", Endpoint: "foo.bar"} +// +// If the target does not contain a scheme, we will apply the default scheme, and set the Target to +// be the full target string. e.g. "foo.bar" will be parsed into +// &Target{Scheme: resolver.GetDefaultScheme(), Endpoint: "foo.bar"}. +// +// If the parsed scheme is not registered (i.e. no corresponding resolver available to resolve the +// endpoint), we set the Scheme to be the default scheme, and set the Endpoint to be the full target +// string. e.g. target string "unknown_scheme://authority/endpoint" will be parsed into +// &Target{Scheme: resolver.GetDefaultScheme(), Endpoint: "unknown_scheme://authority/endpoint"}. +type Target struct { + Scheme string + Authority string + Endpoint string +} + +// Builder creates a resolver that will be used to watch name resolution updates. +type Builder interface { + // Build creates a new resolver for the given target. + // + // gRPC dial calls Build synchronously, and fails if the returned error is + // not nil. + Build(target Target, cc ClientConn, opts BuildOptions) (Resolver, error) + // Scheme returns the scheme supported by this resolver. + // Scheme is defined at https://github.com/grpc/grpc/blob/master/doc/naming.md. + Scheme() string +} + +// ResolveNowOptions includes additional information for ResolveNow. +type ResolveNowOptions struct{} + +// Resolver watches for the updates on the specified target. +// Updates include address updates and service config updates. +type Resolver interface { + // ResolveNow will be called by gRPC to try to resolve the target name + // again. It's just a hint, resolver can ignore this if it's not necessary. + // + // It could be called multiple times concurrently. + ResolveNow(ResolveNowOptions) + // Close closes the resolver. + Close() +} + +// UnregisterForTesting removes the resolver builder with the given scheme from the +// resolver map. +// This function is for testing only. +func UnregisterForTesting(scheme string) { + delete(m, scheme) +} diff --git a/vendor/google.golang.org/grpc/resolver_conn_wrapper.go b/vendor/google.golang.org/grpc/resolver_conn_wrapper.go new file mode 100644 index 000000000..f2d81968f --- /dev/null +++ b/vendor/google.golang.org/grpc/resolver_conn_wrapper.go @@ -0,0 +1,222 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpc + +import ( + "fmt" + "strings" + "sync" + "time" + + "google.golang.org/grpc/balancer" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/internal/channelz" + "google.golang.org/grpc/internal/grpcsync" + "google.golang.org/grpc/resolver" + "google.golang.org/grpc/serviceconfig" +) + +// ccResolverWrapper is a wrapper on top of cc for resolvers. +// It implements resolver.ClientConn interface. +type ccResolverWrapper struct { + cc *ClientConn + resolverMu sync.Mutex + resolver resolver.Resolver + done *grpcsync.Event + curState resolver.State + + pollingMu sync.Mutex + polling chan struct{} +} + +// newCCResolverWrapper uses the resolver.Builder to build a Resolver and +// returns a ccResolverWrapper object which wraps the newly built resolver. +func newCCResolverWrapper(cc *ClientConn, rb resolver.Builder) (*ccResolverWrapper, error) { + ccr := &ccResolverWrapper{ + cc: cc, + done: grpcsync.NewEvent(), + } + + var credsClone credentials.TransportCredentials + if creds := cc.dopts.copts.TransportCredentials; creds != nil { + credsClone = creds.Clone() + } + rbo := resolver.BuildOptions{ + DisableServiceConfig: cc.dopts.disableServiceConfig, + DialCreds: credsClone, + CredsBundle: cc.dopts.copts.CredsBundle, + Dialer: cc.dopts.copts.Dialer, + } + + var err error + // We need to hold the lock here while we assign to the ccr.resolver field + // to guard against a data race caused by the following code path, + // rb.Build-->ccr.ReportError-->ccr.poll-->ccr.resolveNow, would end up + // accessing ccr.resolver which is being assigned here. + ccr.resolverMu.Lock() + defer ccr.resolverMu.Unlock() + ccr.resolver, err = rb.Build(cc.parsedTarget, ccr, rbo) + if err != nil { + return nil, err + } + return ccr, nil +} + +func (ccr *ccResolverWrapper) resolveNow(o resolver.ResolveNowOptions) { + ccr.resolverMu.Lock() + if !ccr.done.HasFired() { + ccr.resolver.ResolveNow(o) + } + ccr.resolverMu.Unlock() +} + +func (ccr *ccResolverWrapper) close() { + ccr.resolverMu.Lock() + ccr.resolver.Close() + ccr.done.Fire() + ccr.resolverMu.Unlock() +} + +// poll begins or ends asynchronous polling of the resolver based on whether +// err is ErrBadResolverState. +func (ccr *ccResolverWrapper) poll(err error) { + ccr.pollingMu.Lock() + defer ccr.pollingMu.Unlock() + if err != balancer.ErrBadResolverState { + // stop polling + if ccr.polling != nil { + close(ccr.polling) + ccr.polling = nil + } + return + } + if ccr.polling != nil { + // already polling + return + } + p := make(chan struct{}) + ccr.polling = p + go func() { + for i := 0; ; i++ { + ccr.resolveNow(resolver.ResolveNowOptions{}) + t := time.NewTimer(ccr.cc.dopts.resolveNowBackoff(i)) + select { + case <-p: + t.Stop() + return + case <-ccr.done.Done(): + // Resolver has been closed. + t.Stop() + return + case <-t.C: + select { + case <-p: + return + default: + } + // Timer expired; re-resolve. + } + } + }() +} + +func (ccr *ccResolverWrapper) UpdateState(s resolver.State) { + if ccr.done.HasFired() { + return + } + channelz.Infof(logger, ccr.cc.channelzID, "ccResolverWrapper: sending update to cc: %v", s) + if channelz.IsOn() { + ccr.addChannelzTraceEvent(s) + } + ccr.curState = s + ccr.poll(ccr.cc.updateResolverState(ccr.curState, nil)) +} + +func (ccr *ccResolverWrapper) ReportError(err error) { + if ccr.done.HasFired() { + return + } + channelz.Warningf(logger, ccr.cc.channelzID, "ccResolverWrapper: reporting error to cc: %v", err) + ccr.poll(ccr.cc.updateResolverState(resolver.State{}, err)) +} + +// NewAddress is called by the resolver implementation to send addresses to gRPC. +func (ccr *ccResolverWrapper) NewAddress(addrs []resolver.Address) { + if ccr.done.HasFired() { + return + } + channelz.Infof(logger, ccr.cc.channelzID, "ccResolverWrapper: sending new addresses to cc: %v", addrs) + if channelz.IsOn() { + ccr.addChannelzTraceEvent(resolver.State{Addresses: addrs, ServiceConfig: ccr.curState.ServiceConfig}) + } + ccr.curState.Addresses = addrs + ccr.poll(ccr.cc.updateResolverState(ccr.curState, nil)) +} + +// NewServiceConfig is called by the resolver implementation to send service +// configs to gRPC. +func (ccr *ccResolverWrapper) NewServiceConfig(sc string) { + if ccr.done.HasFired() { + return + } + channelz.Infof(logger, ccr.cc.channelzID, "ccResolverWrapper: got new service config: %v", sc) + if ccr.cc.dopts.disableServiceConfig { + channelz.Info(logger, ccr.cc.channelzID, "Service config lookups disabled; ignoring config") + return + } + scpr := parseServiceConfig(sc) + if scpr.Err != nil { + channelz.Warningf(logger, ccr.cc.channelzID, "ccResolverWrapper: error parsing service config: %v", scpr.Err) + ccr.poll(balancer.ErrBadResolverState) + return + } + if channelz.IsOn() { + ccr.addChannelzTraceEvent(resolver.State{Addresses: ccr.curState.Addresses, ServiceConfig: scpr}) + } + ccr.curState.ServiceConfig = scpr + ccr.poll(ccr.cc.updateResolverState(ccr.curState, nil)) +} + +func (ccr *ccResolverWrapper) ParseServiceConfig(scJSON string) *serviceconfig.ParseResult { + return parseServiceConfig(scJSON) +} + +func (ccr *ccResolverWrapper) addChannelzTraceEvent(s resolver.State) { + var updates []string + var oldSC, newSC *ServiceConfig + var oldOK, newOK bool + if ccr.curState.ServiceConfig != nil { + oldSC, oldOK = ccr.curState.ServiceConfig.Config.(*ServiceConfig) + } + if s.ServiceConfig != nil { + newSC, newOK = s.ServiceConfig.Config.(*ServiceConfig) + } + if oldOK != newOK || (oldOK && newOK && oldSC.rawJSONString != newSC.rawJSONString) { + updates = append(updates, "service config updated") + } + if len(ccr.curState.Addresses) > 0 && len(s.Addresses) == 0 { + updates = append(updates, "resolver returned an empty address list") + } else if len(ccr.curState.Addresses) == 0 && len(s.Addresses) > 0 { + updates = append(updates, "resolver returned new addresses") + } + channelz.AddTraceEvent(logger, ccr.cc.channelzID, 0, &channelz.TraceEventDesc{ + Desc: fmt.Sprintf("Resolver state updated: %+v (%v)", s, strings.Join(updates, "; ")), + Severity: channelz.CtInfo, + }) +} diff --git a/vendor/google.golang.org/grpc/rpc_util.go b/vendor/google.golang.org/grpc/rpc_util.go new file mode 100644 index 000000000..f0609f2a4 --- /dev/null +++ b/vendor/google.golang.org/grpc/rpc_util.go @@ -0,0 +1,938 @@ +/* + * + * Copyright 2014 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpc + +import ( + "bytes" + "compress/gzip" + "context" + "encoding/binary" + "fmt" + "io" + "io/ioutil" + "math" + "net/url" + "strings" + "sync" + "time" + + "google.golang.org/grpc/codes" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/encoding" + "google.golang.org/grpc/encoding/proto" + "google.golang.org/grpc/internal/transport" + "google.golang.org/grpc/metadata" + "google.golang.org/grpc/peer" + "google.golang.org/grpc/stats" + "google.golang.org/grpc/status" +) + +// Compressor defines the interface gRPC uses to compress a message. +// +// Deprecated: use package encoding. +type Compressor interface { + // Do compresses p into w. + Do(w io.Writer, p []byte) error + // Type returns the compression algorithm the Compressor uses. + Type() string +} + +type gzipCompressor struct { + pool sync.Pool +} + +// NewGZIPCompressor creates a Compressor based on GZIP. +// +// Deprecated: use package encoding/gzip. +func NewGZIPCompressor() Compressor { + c, _ := NewGZIPCompressorWithLevel(gzip.DefaultCompression) + return c +} + +// NewGZIPCompressorWithLevel is like NewGZIPCompressor but specifies the gzip compression level instead +// of assuming DefaultCompression. +// +// The error returned will be nil if the level is valid. +// +// Deprecated: use package encoding/gzip. +func NewGZIPCompressorWithLevel(level int) (Compressor, error) { + if level < gzip.DefaultCompression || level > gzip.BestCompression { + return nil, fmt.Errorf("grpc: invalid compression level: %d", level) + } + return &gzipCompressor{ + pool: sync.Pool{ + New: func() interface{} { + w, err := gzip.NewWriterLevel(ioutil.Discard, level) + if err != nil { + panic(err) + } + return w + }, + }, + }, nil +} + +func (c *gzipCompressor) Do(w io.Writer, p []byte) error { + z := c.pool.Get().(*gzip.Writer) + defer c.pool.Put(z) + z.Reset(w) + if _, err := z.Write(p); err != nil { + return err + } + return z.Close() +} + +func (c *gzipCompressor) Type() string { + return "gzip" +} + +// Decompressor defines the interface gRPC uses to decompress a message. +// +// Deprecated: use package encoding. +type Decompressor interface { + // Do reads the data from r and uncompress them. + Do(r io.Reader) ([]byte, error) + // Type returns the compression algorithm the Decompressor uses. + Type() string +} + +type gzipDecompressor struct { + pool sync.Pool +} + +// NewGZIPDecompressor creates a Decompressor based on GZIP. +// +// Deprecated: use package encoding/gzip. +func NewGZIPDecompressor() Decompressor { + return &gzipDecompressor{} +} + +func (d *gzipDecompressor) Do(r io.Reader) ([]byte, error) { + var z *gzip.Reader + switch maybeZ := d.pool.Get().(type) { + case nil: + newZ, err := gzip.NewReader(r) + if err != nil { + return nil, err + } + z = newZ + case *gzip.Reader: + z = maybeZ + if err := z.Reset(r); err != nil { + d.pool.Put(z) + return nil, err + } + } + + defer func() { + z.Close() + d.pool.Put(z) + }() + return ioutil.ReadAll(z) +} + +func (d *gzipDecompressor) Type() string { + return "gzip" +} + +// callInfo contains all related configuration and information about an RPC. +type callInfo struct { + compressorType string + failFast bool + maxReceiveMessageSize *int + maxSendMessageSize *int + creds credentials.PerRPCCredentials + contentSubtype string + codec baseCodec + maxRetryRPCBufferSize int +} + +func defaultCallInfo() *callInfo { + return &callInfo{ + failFast: true, + maxRetryRPCBufferSize: 256 * 1024, // 256KB + } +} + +// CallOption configures a Call before it starts or extracts information from +// a Call after it completes. +type CallOption interface { + // before is called before the call is sent to any server. If before + // returns a non-nil error, the RPC fails with that error. + before(*callInfo) error + + // after is called after the call has completed. after cannot return an + // error, so any failures should be reported via output parameters. + after(*callInfo, *csAttempt) +} + +// EmptyCallOption does not alter the Call configuration. +// It can be embedded in another structure to carry satellite data for use +// by interceptors. +type EmptyCallOption struct{} + +func (EmptyCallOption) before(*callInfo) error { return nil } +func (EmptyCallOption) after(*callInfo, *csAttempt) {} + +// Header returns a CallOptions that retrieves the header metadata +// for a unary RPC. +func Header(md *metadata.MD) CallOption { + return HeaderCallOption{HeaderAddr: md} +} + +// HeaderCallOption is a CallOption for collecting response header metadata. +// The metadata field will be populated *after* the RPC completes. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type HeaderCallOption struct { + HeaderAddr *metadata.MD +} + +func (o HeaderCallOption) before(c *callInfo) error { return nil } +func (o HeaderCallOption) after(c *callInfo, attempt *csAttempt) { + *o.HeaderAddr, _ = attempt.s.Header() +} + +// Trailer returns a CallOptions that retrieves the trailer metadata +// for a unary RPC. +func Trailer(md *metadata.MD) CallOption { + return TrailerCallOption{TrailerAddr: md} +} + +// TrailerCallOption is a CallOption for collecting response trailer metadata. +// The metadata field will be populated *after* the RPC completes. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type TrailerCallOption struct { + TrailerAddr *metadata.MD +} + +func (o TrailerCallOption) before(c *callInfo) error { return nil } +func (o TrailerCallOption) after(c *callInfo, attempt *csAttempt) { + *o.TrailerAddr = attempt.s.Trailer() +} + +// Peer returns a CallOption that retrieves peer information for a unary RPC. +// The peer field will be populated *after* the RPC completes. +func Peer(p *peer.Peer) CallOption { + return PeerCallOption{PeerAddr: p} +} + +// PeerCallOption is a CallOption for collecting the identity of the remote +// peer. The peer field will be populated *after* the RPC completes. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type PeerCallOption struct { + PeerAddr *peer.Peer +} + +func (o PeerCallOption) before(c *callInfo) error { return nil } +func (o PeerCallOption) after(c *callInfo, attempt *csAttempt) { + if x, ok := peer.FromContext(attempt.s.Context()); ok { + *o.PeerAddr = *x + } +} + +// WaitForReady configures the action to take when an RPC is attempted on broken +// connections or unreachable servers. If waitForReady is false, the RPC will fail +// immediately. Otherwise, the RPC client will block the call until a +// connection is available (or the call is canceled or times out) and will +// retry the call if it fails due to a transient error. gRPC will not retry if +// data was written to the wire unless the server indicates it did not process +// the data. Please refer to +// https://github.com/grpc/grpc/blob/master/doc/wait-for-ready.md. +// +// By default, RPCs don't "wait for ready". +func WaitForReady(waitForReady bool) CallOption { + return FailFastCallOption{FailFast: !waitForReady} +} + +// FailFast is the opposite of WaitForReady. +// +// Deprecated: use WaitForReady. +func FailFast(failFast bool) CallOption { + return FailFastCallOption{FailFast: failFast} +} + +// FailFastCallOption is a CallOption for indicating whether an RPC should fail +// fast or not. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type FailFastCallOption struct { + FailFast bool +} + +func (o FailFastCallOption) before(c *callInfo) error { + c.failFast = o.FailFast + return nil +} +func (o FailFastCallOption) after(c *callInfo, attempt *csAttempt) {} + +// MaxCallRecvMsgSize returns a CallOption which sets the maximum message size +// in bytes the client can receive. +func MaxCallRecvMsgSize(bytes int) CallOption { + return MaxRecvMsgSizeCallOption{MaxRecvMsgSize: bytes} +} + +// MaxRecvMsgSizeCallOption is a CallOption that indicates the maximum message +// size in bytes the client can receive. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type MaxRecvMsgSizeCallOption struct { + MaxRecvMsgSize int +} + +func (o MaxRecvMsgSizeCallOption) before(c *callInfo) error { + c.maxReceiveMessageSize = &o.MaxRecvMsgSize + return nil +} +func (o MaxRecvMsgSizeCallOption) after(c *callInfo, attempt *csAttempt) {} + +// MaxCallSendMsgSize returns a CallOption which sets the maximum message size +// in bytes the client can send. +func MaxCallSendMsgSize(bytes int) CallOption { + return MaxSendMsgSizeCallOption{MaxSendMsgSize: bytes} +} + +// MaxSendMsgSizeCallOption is a CallOption that indicates the maximum message +// size in bytes the client can send. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type MaxSendMsgSizeCallOption struct { + MaxSendMsgSize int +} + +func (o MaxSendMsgSizeCallOption) before(c *callInfo) error { + c.maxSendMessageSize = &o.MaxSendMsgSize + return nil +} +func (o MaxSendMsgSizeCallOption) after(c *callInfo, attempt *csAttempt) {} + +// PerRPCCredentials returns a CallOption that sets credentials.PerRPCCredentials +// for a call. +func PerRPCCredentials(creds credentials.PerRPCCredentials) CallOption { + return PerRPCCredsCallOption{Creds: creds} +} + +// PerRPCCredsCallOption is a CallOption that indicates the per-RPC +// credentials to use for the call. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type PerRPCCredsCallOption struct { + Creds credentials.PerRPCCredentials +} + +func (o PerRPCCredsCallOption) before(c *callInfo) error { + c.creds = o.Creds + return nil +} +func (o PerRPCCredsCallOption) after(c *callInfo, attempt *csAttempt) {} + +// UseCompressor returns a CallOption which sets the compressor used when +// sending the request. If WithCompressor is also set, UseCompressor has +// higher priority. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func UseCompressor(name string) CallOption { + return CompressorCallOption{CompressorType: name} +} + +// CompressorCallOption is a CallOption that indicates the compressor to use. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type CompressorCallOption struct { + CompressorType string +} + +func (o CompressorCallOption) before(c *callInfo) error { + c.compressorType = o.CompressorType + return nil +} +func (o CompressorCallOption) after(c *callInfo, attempt *csAttempt) {} + +// CallContentSubtype returns a CallOption that will set the content-subtype +// for a call. For example, if content-subtype is "json", the Content-Type over +// the wire will be "application/grpc+json". The content-subtype is converted +// to lowercase before being included in Content-Type. See Content-Type on +// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests for +// more details. +// +// If ForceCodec is not also used, the content-subtype will be used to look up +// the Codec to use in the registry controlled by RegisterCodec. See the +// documentation on RegisterCodec for details on registration. The lookup of +// content-subtype is case-insensitive. If no such Codec is found, the call +// will result in an error with code codes.Internal. +// +// If ForceCodec is also used, that Codec will be used for all request and +// response messages, with the content-subtype set to the given contentSubtype +// here for requests. +func CallContentSubtype(contentSubtype string) CallOption { + return ContentSubtypeCallOption{ContentSubtype: strings.ToLower(contentSubtype)} +} + +// ContentSubtypeCallOption is a CallOption that indicates the content-subtype +// used for marshaling messages. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type ContentSubtypeCallOption struct { + ContentSubtype string +} + +func (o ContentSubtypeCallOption) before(c *callInfo) error { + c.contentSubtype = o.ContentSubtype + return nil +} +func (o ContentSubtypeCallOption) after(c *callInfo, attempt *csAttempt) {} + +// ForceCodec returns a CallOption that will set the given Codec to be +// used for all request and response messages for a call. The result of calling +// String() will be used as the content-subtype in a case-insensitive manner. +// +// See Content-Type on +// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests for +// more details. Also see the documentation on RegisterCodec and +// CallContentSubtype for more details on the interaction between Codec and +// content-subtype. +// +// This function is provided for advanced users; prefer to use only +// CallContentSubtype to select a registered codec instead. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func ForceCodec(codec encoding.Codec) CallOption { + return ForceCodecCallOption{Codec: codec} +} + +// ForceCodecCallOption is a CallOption that indicates the codec used for +// marshaling messages. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type ForceCodecCallOption struct { + Codec encoding.Codec +} + +func (o ForceCodecCallOption) before(c *callInfo) error { + c.codec = o.Codec + return nil +} +func (o ForceCodecCallOption) after(c *callInfo, attempt *csAttempt) {} + +// CallCustomCodec behaves like ForceCodec, but accepts a grpc.Codec instead of +// an encoding.Codec. +// +// Deprecated: use ForceCodec instead. +func CallCustomCodec(codec Codec) CallOption { + return CustomCodecCallOption{Codec: codec} +} + +// CustomCodecCallOption is a CallOption that indicates the codec used for +// marshaling messages. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type CustomCodecCallOption struct { + Codec Codec +} + +func (o CustomCodecCallOption) before(c *callInfo) error { + c.codec = o.Codec + return nil +} +func (o CustomCodecCallOption) after(c *callInfo, attempt *csAttempt) {} + +// MaxRetryRPCBufferSize returns a CallOption that limits the amount of memory +// used for buffering this RPC's requests for retry purposes. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func MaxRetryRPCBufferSize(bytes int) CallOption { + return MaxRetryRPCBufferSizeCallOption{bytes} +} + +// MaxRetryRPCBufferSizeCallOption is a CallOption indicating the amount of +// memory to be used for caching this RPC for retry purposes. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type MaxRetryRPCBufferSizeCallOption struct { + MaxRetryRPCBufferSize int +} + +func (o MaxRetryRPCBufferSizeCallOption) before(c *callInfo) error { + c.maxRetryRPCBufferSize = o.MaxRetryRPCBufferSize + return nil +} +func (o MaxRetryRPCBufferSizeCallOption) after(c *callInfo, attempt *csAttempt) {} + +// The format of the payload: compressed or not? +type payloadFormat uint8 + +const ( + compressionNone payloadFormat = 0 // no compression + compressionMade payloadFormat = 1 // compressed +) + +// parser reads complete gRPC messages from the underlying reader. +type parser struct { + // r is the underlying reader. + // See the comment on recvMsg for the permissible + // error types. + r io.Reader + + // The header of a gRPC message. Find more detail at + // https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md + header [5]byte +} + +// recvMsg reads a complete gRPC message from the stream. +// +// It returns the message and its payload (compression/encoding) +// format. The caller owns the returned msg memory. +// +// If there is an error, possible values are: +// * io.EOF, when no messages remain +// * io.ErrUnexpectedEOF +// * of type transport.ConnectionError +// * an error from the status package +// No other error values or types must be returned, which also means +// that the underlying io.Reader must not return an incompatible +// error. +func (p *parser) recvMsg(maxReceiveMessageSize int) (pf payloadFormat, msg []byte, err error) { + if _, err := p.r.Read(p.header[:]); err != nil { + return 0, nil, err + } + + pf = payloadFormat(p.header[0]) + length := binary.BigEndian.Uint32(p.header[1:]) + + if length == 0 { + return pf, nil, nil + } + if int64(length) > int64(maxInt) { + return 0, nil, status.Errorf(codes.ResourceExhausted, "grpc: received message larger than max length allowed on current machine (%d vs. %d)", length, maxInt) + } + if int(length) > maxReceiveMessageSize { + return 0, nil, status.Errorf(codes.ResourceExhausted, "grpc: received message larger than max (%d vs. %d)", length, maxReceiveMessageSize) + } + // TODO(bradfitz,zhaoq): garbage. reuse buffer after proto decoding instead + // of making it for each message: + msg = make([]byte, int(length)) + if _, err := p.r.Read(msg); err != nil { + if err == io.EOF { + err = io.ErrUnexpectedEOF + } + return 0, nil, err + } + return pf, msg, nil +} + +// encode serializes msg and returns a buffer containing the message, or an +// error if it is too large to be transmitted by grpc. If msg is nil, it +// generates an empty message. +func encode(c baseCodec, msg interface{}) ([]byte, error) { + if msg == nil { // NOTE: typed nils will not be caught by this check + return nil, nil + } + b, err := c.Marshal(msg) + if err != nil { + return nil, status.Errorf(codes.Internal, "grpc: error while marshaling: %v", err.Error()) + } + if uint(len(b)) > math.MaxUint32 { + return nil, status.Errorf(codes.ResourceExhausted, "grpc: message too large (%d bytes)", len(b)) + } + return b, nil +} + +// compress returns the input bytes compressed by compressor or cp. If both +// compressors are nil, returns nil. +// +// TODO(dfawley): eliminate cp parameter by wrapping Compressor in an encoding.Compressor. +func compress(in []byte, cp Compressor, compressor encoding.Compressor) ([]byte, error) { + if compressor == nil && cp == nil { + return nil, nil + } + wrapErr := func(err error) error { + return status.Errorf(codes.Internal, "grpc: error while compressing: %v", err.Error()) + } + cbuf := &bytes.Buffer{} + if compressor != nil { + z, err := compressor.Compress(cbuf) + if err != nil { + return nil, wrapErr(err) + } + if _, err := z.Write(in); err != nil { + return nil, wrapErr(err) + } + if err := z.Close(); err != nil { + return nil, wrapErr(err) + } + } else { + if err := cp.Do(cbuf, in); err != nil { + return nil, wrapErr(err) + } + } + return cbuf.Bytes(), nil +} + +const ( + payloadLen = 1 + sizeLen = 4 + headerLen = payloadLen + sizeLen +) + +// msgHeader returns a 5-byte header for the message being transmitted and the +// payload, which is compData if non-nil or data otherwise. +func msgHeader(data, compData []byte) (hdr []byte, payload []byte) { + hdr = make([]byte, headerLen) + if compData != nil { + hdr[0] = byte(compressionMade) + data = compData + } else { + hdr[0] = byte(compressionNone) + } + + // Write length of payload into buf + binary.BigEndian.PutUint32(hdr[payloadLen:], uint32(len(data))) + return hdr, data +} + +func outPayload(client bool, msg interface{}, data, payload []byte, t time.Time) *stats.OutPayload { + return &stats.OutPayload{ + Client: client, + Payload: msg, + Data: data, + Length: len(data), + WireLength: len(payload) + headerLen, + SentTime: t, + } +} + +func checkRecvPayload(pf payloadFormat, recvCompress string, haveCompressor bool) *status.Status { + switch pf { + case compressionNone: + case compressionMade: + if recvCompress == "" || recvCompress == encoding.Identity { + return status.New(codes.Internal, "grpc: compressed flag set with identity or empty encoding") + } + if !haveCompressor { + return status.Newf(codes.Unimplemented, "grpc: Decompressor is not installed for grpc-encoding %q", recvCompress) + } + default: + return status.Newf(codes.Internal, "grpc: received unexpected payload format %d", pf) + } + return nil +} + +type payloadInfo struct { + wireLength int // The compressed length got from wire. + uncompressedBytes []byte +} + +func recvAndDecompress(p *parser, s *transport.Stream, dc Decompressor, maxReceiveMessageSize int, payInfo *payloadInfo, compressor encoding.Compressor) ([]byte, error) { + pf, d, err := p.recvMsg(maxReceiveMessageSize) + if err != nil { + return nil, err + } + if payInfo != nil { + payInfo.wireLength = len(d) + } + + if st := checkRecvPayload(pf, s.RecvCompress(), compressor != nil || dc != nil); st != nil { + return nil, st.Err() + } + + var size int + if pf == compressionMade { + // To match legacy behavior, if the decompressor is set by WithDecompressor or RPCDecompressor, + // use this decompressor as the default. + if dc != nil { + d, err = dc.Do(bytes.NewReader(d)) + size = len(d) + } else { + d, size, err = decompress(compressor, d, maxReceiveMessageSize) + } + if err != nil { + return nil, status.Errorf(codes.Internal, "grpc: failed to decompress the received message %v", err) + } + } else { + size = len(d) + } + if size > maxReceiveMessageSize { + // TODO: Revisit the error code. Currently keep it consistent with java + // implementation. + return nil, status.Errorf(codes.ResourceExhausted, "grpc: received message larger than max (%d vs. %d)", size, maxReceiveMessageSize) + } + return d, nil +} + +// Using compressor, decompress d, returning data and size. +// Optionally, if data will be over maxReceiveMessageSize, just return the size. +func decompress(compressor encoding.Compressor, d []byte, maxReceiveMessageSize int) ([]byte, int, error) { + dcReader, err := compressor.Decompress(bytes.NewReader(d)) + if err != nil { + return nil, 0, err + } + if sizer, ok := compressor.(interface { + DecompressedSize(compressedBytes []byte) int + }); ok { + if size := sizer.DecompressedSize(d); size >= 0 { + if size > maxReceiveMessageSize { + return nil, size, nil + } + // size is used as an estimate to size the buffer, but we + // will read more data if available. + // +MinRead so ReadFrom will not reallocate if size is correct. + buf := bytes.NewBuffer(make([]byte, 0, size+bytes.MinRead)) + bytesRead, err := buf.ReadFrom(io.LimitReader(dcReader, int64(maxReceiveMessageSize)+1)) + return buf.Bytes(), int(bytesRead), err + } + } + // Read from LimitReader with limit max+1. So if the underlying + // reader is over limit, the result will be bigger than max. + d, err = ioutil.ReadAll(io.LimitReader(dcReader, int64(maxReceiveMessageSize)+1)) + return d, len(d), err +} + +// For the two compressor parameters, both should not be set, but if they are, +// dc takes precedence over compressor. +// TODO(dfawley): wrap the old compressor/decompressor using the new API? +func recv(p *parser, c baseCodec, s *transport.Stream, dc Decompressor, m interface{}, maxReceiveMessageSize int, payInfo *payloadInfo, compressor encoding.Compressor) error { + d, err := recvAndDecompress(p, s, dc, maxReceiveMessageSize, payInfo, compressor) + if err != nil { + return err + } + if err := c.Unmarshal(d, m); err != nil { + return status.Errorf(codes.Internal, "grpc: failed to unmarshal the received message %v", err) + } + if payInfo != nil { + payInfo.uncompressedBytes = d + } + return nil +} + +// Information about RPC +type rpcInfo struct { + failfast bool + preloaderInfo *compressorInfo +} + +// Information about Preloader +// Responsible for storing codec, and compressors +// If stream (s) has context s.Context which stores rpcInfo that has non nil +// pointers to codec, and compressors, then we can use preparedMsg for Async message prep +// and reuse marshalled bytes +type compressorInfo struct { + codec baseCodec + cp Compressor + comp encoding.Compressor +} + +type rpcInfoContextKey struct{} + +func newContextWithRPCInfo(ctx context.Context, failfast bool, codec baseCodec, cp Compressor, comp encoding.Compressor) context.Context { + return context.WithValue(ctx, rpcInfoContextKey{}, &rpcInfo{ + failfast: failfast, + preloaderInfo: &compressorInfo{ + codec: codec, + cp: cp, + comp: comp, + }, + }) +} + +func rpcInfoFromContext(ctx context.Context) (s *rpcInfo, ok bool) { + s, ok = ctx.Value(rpcInfoContextKey{}).(*rpcInfo) + return +} + +// Code returns the error code for err if it was produced by the rpc system. +// Otherwise, it returns codes.Unknown. +// +// Deprecated: use status.Code instead. +func Code(err error) codes.Code { + return status.Code(err) +} + +// ErrorDesc returns the error description of err if it was produced by the rpc system. +// Otherwise, it returns err.Error() or empty string when err is nil. +// +// Deprecated: use status.Convert and Message method instead. +func ErrorDesc(err error) string { + return status.Convert(err).Message() +} + +// Errorf returns an error containing an error code and a description; +// Errorf returns nil if c is OK. +// +// Deprecated: use status.Errorf instead. +func Errorf(c codes.Code, format string, a ...interface{}) error { + return status.Errorf(c, format, a...) +} + +// toRPCErr converts an error into an error from the status package. +func toRPCErr(err error) error { + if err == nil || err == io.EOF { + return err + } + if err == io.ErrUnexpectedEOF { + return status.Error(codes.Internal, err.Error()) + } + if _, ok := status.FromError(err); ok { + return err + } + switch e := err.(type) { + case transport.ConnectionError: + return status.Error(codes.Unavailable, e.Desc) + default: + switch err { + case context.DeadlineExceeded: + return status.Error(codes.DeadlineExceeded, err.Error()) + case context.Canceled: + return status.Error(codes.Canceled, err.Error()) + } + } + return status.Error(codes.Unknown, err.Error()) +} + +// setCallInfoCodec should only be called after CallOptions have been applied. +func setCallInfoCodec(c *callInfo) error { + if c.codec != nil { + // codec was already set by a CallOption; use it. + return nil + } + + if c.contentSubtype == "" { + // No codec specified in CallOptions; use proto by default. + c.codec = encoding.GetCodec(proto.Name) + return nil + } + + // c.contentSubtype is already lowercased in CallContentSubtype + c.codec = encoding.GetCodec(c.contentSubtype) + if c.codec == nil { + return status.Errorf(codes.Internal, "no codec registered for content-subtype %s", c.contentSubtype) + } + return nil +} + +// parseDialTarget returns the network and address to pass to dialer +func parseDialTarget(target string) (net string, addr string) { + net = "tcp" + + m1 := strings.Index(target, ":") + m2 := strings.Index(target, ":/") + + // handle unix:addr which will fail with url.Parse + if m1 >= 0 && m2 < 0 { + if n := target[0:m1]; n == "unix" { + net = n + addr = target[m1+1:] + return net, addr + } + } + if m2 >= 0 { + t, err := url.Parse(target) + if err != nil { + return net, target + } + scheme := t.Scheme + addr = t.Path + if scheme == "unix" { + net = scheme + if addr == "" { + addr = t.Host + } + return net, addr + } + } + + return net, target +} + +// channelzData is used to store channelz related data for ClientConn, addrConn and Server. +// These fields cannot be embedded in the original structs (e.g. ClientConn), since to do atomic +// operation on int64 variable on 32-bit machine, user is responsible to enforce memory alignment. +// Here, by grouping those int64 fields inside a struct, we are enforcing the alignment. +type channelzData struct { + callsStarted int64 + callsFailed int64 + callsSucceeded int64 + // lastCallStartedTime stores the timestamp that last call starts. It is of int64 type instead of + // time.Time since it's more costly to atomically update time.Time variable than int64 variable. + lastCallStartedTime int64 +} + +// The SupportPackageIsVersion variables are referenced from generated protocol +// buffer files to ensure compatibility with the gRPC version used. The latest +// support package version is 7. +// +// Older versions are kept for compatibility. They may be removed if +// compatibility cannot be maintained. +// +// These constants should not be referenced from any other code. +const ( + SupportPackageIsVersion3 = true + SupportPackageIsVersion4 = true + SupportPackageIsVersion5 = true + SupportPackageIsVersion6 = true + SupportPackageIsVersion7 = true +) + +const grpcUA = "grpc-go/" + Version diff --git a/vendor/google.golang.org/grpc/server.go b/vendor/google.golang.org/grpc/server.go new file mode 100644 index 000000000..968eb598e --- /dev/null +++ b/vendor/google.golang.org/grpc/server.go @@ -0,0 +1,1780 @@ +/* + * + * Copyright 2014 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpc + +import ( + "context" + "errors" + "fmt" + "io" + "math" + "net" + "net/http" + "reflect" + "runtime" + "strings" + "sync" + "sync/atomic" + "time" + + "golang.org/x/net/trace" + + "google.golang.org/grpc/codes" + "google.golang.org/grpc/credentials" + "google.golang.org/grpc/encoding" + "google.golang.org/grpc/encoding/proto" + "google.golang.org/grpc/grpclog" + "google.golang.org/grpc/internal/binarylog" + "google.golang.org/grpc/internal/channelz" + "google.golang.org/grpc/internal/grpcrand" + "google.golang.org/grpc/internal/grpcsync" + "google.golang.org/grpc/internal/transport" + "google.golang.org/grpc/keepalive" + "google.golang.org/grpc/metadata" + "google.golang.org/grpc/peer" + "google.golang.org/grpc/stats" + "google.golang.org/grpc/status" + "google.golang.org/grpc/tap" +) + +const ( + defaultServerMaxReceiveMessageSize = 1024 * 1024 * 4 + defaultServerMaxSendMessageSize = math.MaxInt32 +) + +var statusOK = status.New(codes.OK, "") +var logger = grpclog.Component("core") + +type methodHandler func(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor UnaryServerInterceptor) (interface{}, error) + +// MethodDesc represents an RPC service's method specification. +type MethodDesc struct { + MethodName string + Handler methodHandler +} + +// ServiceDesc represents an RPC service's specification. +type ServiceDesc struct { + ServiceName string + // The pointer to the service interface. Used to check whether the user + // provided implementation satisfies the interface requirements. + HandlerType interface{} + Methods []MethodDesc + Streams []StreamDesc + Metadata interface{} +} + +// serviceInfo wraps information about a service. It is very similar to +// ServiceDesc and is constructed from it for internal purposes. +type serviceInfo struct { + // Contains the implementation for the methods in this service. + serviceImpl interface{} + methods map[string]*MethodDesc + streams map[string]*StreamDesc + mdata interface{} +} + +type serverWorkerData struct { + st transport.ServerTransport + wg *sync.WaitGroup + stream *transport.Stream +} + +// Server is a gRPC server to serve RPC requests. +type Server struct { + opts serverOptions + + mu sync.Mutex // guards following + lis map[net.Listener]bool + conns map[transport.ServerTransport]bool + serve bool + drain bool + cv *sync.Cond // signaled when connections close for GracefulStop + services map[string]*serviceInfo // service name -> service info + events trace.EventLog + + quit *grpcsync.Event + done *grpcsync.Event + channelzRemoveOnce sync.Once + serveWG sync.WaitGroup // counts active Serve goroutines for GracefulStop + + channelzID int64 // channelz unique identification number + czData *channelzData + + serverWorkerChannels []chan *serverWorkerData +} + +type serverOptions struct { + creds credentials.TransportCredentials + codec baseCodec + cp Compressor + dc Decompressor + unaryInt UnaryServerInterceptor + streamInt StreamServerInterceptor + chainUnaryInts []UnaryServerInterceptor + chainStreamInts []StreamServerInterceptor + inTapHandle tap.ServerInHandle + statsHandler stats.Handler + maxConcurrentStreams uint32 + maxReceiveMessageSize int + maxSendMessageSize int + unknownStreamDesc *StreamDesc + keepaliveParams keepalive.ServerParameters + keepalivePolicy keepalive.EnforcementPolicy + initialWindowSize int32 + initialConnWindowSize int32 + writeBufferSize int + readBufferSize int + connectionTimeout time.Duration + maxHeaderListSize *uint32 + headerTableSize *uint32 + numServerWorkers uint32 +} + +var defaultServerOptions = serverOptions{ + maxReceiveMessageSize: defaultServerMaxReceiveMessageSize, + maxSendMessageSize: defaultServerMaxSendMessageSize, + connectionTimeout: 120 * time.Second, + writeBufferSize: defaultWriteBufSize, + readBufferSize: defaultReadBufSize, +} + +// A ServerOption sets options such as credentials, codec and keepalive parameters, etc. +type ServerOption interface { + apply(*serverOptions) +} + +// EmptyServerOption does not alter the server configuration. It can be embedded +// in another structure to build custom server options. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type EmptyServerOption struct{} + +func (EmptyServerOption) apply(*serverOptions) {} + +// funcServerOption wraps a function that modifies serverOptions into an +// implementation of the ServerOption interface. +type funcServerOption struct { + f func(*serverOptions) +} + +func (fdo *funcServerOption) apply(do *serverOptions) { + fdo.f(do) +} + +func newFuncServerOption(f func(*serverOptions)) *funcServerOption { + return &funcServerOption{ + f: f, + } +} + +// WriteBufferSize determines how much data can be batched before doing a write on the wire. +// The corresponding memory allocation for this buffer will be twice the size to keep syscalls low. +// The default value for this buffer is 32KB. +// Zero will disable the write buffer such that each write will be on underlying connection. +// Note: A Send call may not directly translate to a write. +func WriteBufferSize(s int) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.writeBufferSize = s + }) +} + +// ReadBufferSize lets you set the size of read buffer, this determines how much data can be read at most +// for one read syscall. +// The default value for this buffer is 32KB. +// Zero will disable read buffer for a connection so data framer can access the underlying +// conn directly. +func ReadBufferSize(s int) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.readBufferSize = s + }) +} + +// InitialWindowSize returns a ServerOption that sets window size for stream. +// The lower bound for window size is 64K and any value smaller than that will be ignored. +func InitialWindowSize(s int32) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.initialWindowSize = s + }) +} + +// InitialConnWindowSize returns a ServerOption that sets window size for a connection. +// The lower bound for window size is 64K and any value smaller than that will be ignored. +func InitialConnWindowSize(s int32) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.initialConnWindowSize = s + }) +} + +// KeepaliveParams returns a ServerOption that sets keepalive and max-age parameters for the server. +func KeepaliveParams(kp keepalive.ServerParameters) ServerOption { + if kp.Time > 0 && kp.Time < time.Second { + logger.Warning("Adjusting keepalive ping interval to minimum period of 1s") + kp.Time = time.Second + } + + return newFuncServerOption(func(o *serverOptions) { + o.keepaliveParams = kp + }) +} + +// KeepaliveEnforcementPolicy returns a ServerOption that sets keepalive enforcement policy for the server. +func KeepaliveEnforcementPolicy(kep keepalive.EnforcementPolicy) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.keepalivePolicy = kep + }) +} + +// CustomCodec returns a ServerOption that sets a codec for message marshaling and unmarshaling. +// +// This will override any lookups by content-subtype for Codecs registered with RegisterCodec. +// +// Deprecated: register codecs using encoding.RegisterCodec. The server will +// automatically use registered codecs based on the incoming requests' headers. +// See also +// https://github.com/grpc/grpc-go/blob/master/Documentation/encoding.md#using-a-codec. +// Will be supported throughout 1.x. +func CustomCodec(codec Codec) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.codec = codec + }) +} + +// RPCCompressor returns a ServerOption that sets a compressor for outbound +// messages. For backward compatibility, all outbound messages will be sent +// using this compressor, regardless of incoming message compression. By +// default, server messages will be sent using the same compressor with which +// request messages were sent. +// +// Deprecated: use encoding.RegisterCompressor instead. Will be supported +// throughout 1.x. +func RPCCompressor(cp Compressor) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.cp = cp + }) +} + +// RPCDecompressor returns a ServerOption that sets a decompressor for inbound +// messages. It has higher priority than decompressors registered via +// encoding.RegisterCompressor. +// +// Deprecated: use encoding.RegisterCompressor instead. Will be supported +// throughout 1.x. +func RPCDecompressor(dc Decompressor) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.dc = dc + }) +} + +// MaxMsgSize returns a ServerOption to set the max message size in bytes the server can receive. +// If this is not set, gRPC uses the default limit. +// +// Deprecated: use MaxRecvMsgSize instead. Will be supported throughout 1.x. +func MaxMsgSize(m int) ServerOption { + return MaxRecvMsgSize(m) +} + +// MaxRecvMsgSize returns a ServerOption to set the max message size in bytes the server can receive. +// If this is not set, gRPC uses the default 4MB. +func MaxRecvMsgSize(m int) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.maxReceiveMessageSize = m + }) +} + +// MaxSendMsgSize returns a ServerOption to set the max message size in bytes the server can send. +// If this is not set, gRPC uses the default `math.MaxInt32`. +func MaxSendMsgSize(m int) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.maxSendMessageSize = m + }) +} + +// MaxConcurrentStreams returns a ServerOption that will apply a limit on the number +// of concurrent streams to each ServerTransport. +func MaxConcurrentStreams(n uint32) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.maxConcurrentStreams = n + }) +} + +// Creds returns a ServerOption that sets credentials for server connections. +func Creds(c credentials.TransportCredentials) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.creds = c + }) +} + +// UnaryInterceptor returns a ServerOption that sets the UnaryServerInterceptor for the +// server. Only one unary interceptor can be installed. The construction of multiple +// interceptors (e.g., chaining) can be implemented at the caller. +func UnaryInterceptor(i UnaryServerInterceptor) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + if o.unaryInt != nil { + panic("The unary server interceptor was already set and may not be reset.") + } + o.unaryInt = i + }) +} + +// ChainUnaryInterceptor returns a ServerOption that specifies the chained interceptor +// for unary RPCs. The first interceptor will be the outer most, +// while the last interceptor will be the inner most wrapper around the real call. +// All unary interceptors added by this method will be chained. +func ChainUnaryInterceptor(interceptors ...UnaryServerInterceptor) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.chainUnaryInts = append(o.chainUnaryInts, interceptors...) + }) +} + +// StreamInterceptor returns a ServerOption that sets the StreamServerInterceptor for the +// server. Only one stream interceptor can be installed. +func StreamInterceptor(i StreamServerInterceptor) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + if o.streamInt != nil { + panic("The stream server interceptor was already set and may not be reset.") + } + o.streamInt = i + }) +} + +// ChainStreamInterceptor returns a ServerOption that specifies the chained interceptor +// for streaming RPCs. The first interceptor will be the outer most, +// while the last interceptor will be the inner most wrapper around the real call. +// All stream interceptors added by this method will be chained. +func ChainStreamInterceptor(interceptors ...StreamServerInterceptor) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.chainStreamInts = append(o.chainStreamInts, interceptors...) + }) +} + +// InTapHandle returns a ServerOption that sets the tap handle for all the server +// transport to be created. Only one can be installed. +func InTapHandle(h tap.ServerInHandle) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + if o.inTapHandle != nil { + panic("The tap handle was already set and may not be reset.") + } + o.inTapHandle = h + }) +} + +// StatsHandler returns a ServerOption that sets the stats handler for the server. +func StatsHandler(h stats.Handler) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.statsHandler = h + }) +} + +// UnknownServiceHandler returns a ServerOption that allows for adding a custom +// unknown service handler. The provided method is a bidi-streaming RPC service +// handler that will be invoked instead of returning the "unimplemented" gRPC +// error whenever a request is received for an unregistered service or method. +// The handling function and stream interceptor (if set) have full access to +// the ServerStream, including its Context. +func UnknownServiceHandler(streamHandler StreamHandler) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.unknownStreamDesc = &StreamDesc{ + StreamName: "unknown_service_handler", + Handler: streamHandler, + // We need to assume that the users of the streamHandler will want to use both. + ClientStreams: true, + ServerStreams: true, + } + }) +} + +// ConnectionTimeout returns a ServerOption that sets the timeout for +// connection establishment (up to and including HTTP/2 handshaking) for all +// new connections. If this is not set, the default is 120 seconds. A zero or +// negative value will result in an immediate timeout. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func ConnectionTimeout(d time.Duration) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.connectionTimeout = d + }) +} + +// MaxHeaderListSize returns a ServerOption that sets the max (uncompressed) size +// of header list that the server is prepared to accept. +func MaxHeaderListSize(s uint32) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.maxHeaderListSize = &s + }) +} + +// HeaderTableSize returns a ServerOption that sets the size of dynamic +// header table for stream. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func HeaderTableSize(s uint32) ServerOption { + return newFuncServerOption(func(o *serverOptions) { + o.headerTableSize = &s + }) +} + +// NumStreamWorkers returns a ServerOption that sets the number of worker +// goroutines that should be used to process incoming streams. Setting this to +// zero (default) will disable workers and spawn a new goroutine for each +// stream. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func NumStreamWorkers(numServerWorkers uint32) ServerOption { + // TODO: If/when this API gets stabilized (i.e. stream workers become the + // only way streams are processed), change the behavior of the zero value to + // a sane default. Preliminary experiments suggest that a value equal to the + // number of CPUs available is most performant; requires thorough testing. + return newFuncServerOption(func(o *serverOptions) { + o.numServerWorkers = numServerWorkers + }) +} + +// serverWorkerResetThreshold defines how often the stack must be reset. Every +// N requests, by spawning a new goroutine in its place, a worker can reset its +// stack so that large stacks don't live in memory forever. 2^16 should allow +// each goroutine stack to live for at least a few seconds in a typical +// workload (assuming a QPS of a few thousand requests/sec). +const serverWorkerResetThreshold = 1 << 16 + +// serverWorkers blocks on a *transport.Stream channel forever and waits for +// data to be fed by serveStreams. This allows different requests to be +// processed by the same goroutine, removing the need for expensive stack +// re-allocations (see the runtime.morestack problem [1]). +// +// [1] https://github.com/golang/go/issues/18138 +func (s *Server) serverWorker(ch chan *serverWorkerData) { + // To make sure all server workers don't reset at the same time, choose a + // random number of iterations before resetting. + threshold := serverWorkerResetThreshold + grpcrand.Intn(serverWorkerResetThreshold) + for completed := 0; completed < threshold; completed++ { + data, ok := <-ch + if !ok { + return + } + s.handleStream(data.st, data.stream, s.traceInfo(data.st, data.stream)) + data.wg.Done() + } + go s.serverWorker(ch) +} + +// initServerWorkers creates worker goroutines and channels to process incoming +// connections to reduce the time spent overall on runtime.morestack. +func (s *Server) initServerWorkers() { + s.serverWorkerChannels = make([]chan *serverWorkerData, s.opts.numServerWorkers) + for i := uint32(0); i < s.opts.numServerWorkers; i++ { + s.serverWorkerChannels[i] = make(chan *serverWorkerData) + go s.serverWorker(s.serverWorkerChannels[i]) + } +} + +func (s *Server) stopServerWorkers() { + for i := uint32(0); i < s.opts.numServerWorkers; i++ { + close(s.serverWorkerChannels[i]) + } +} + +// NewServer creates a gRPC server which has no service registered and has not +// started to accept requests yet. +func NewServer(opt ...ServerOption) *Server { + opts := defaultServerOptions + for _, o := range opt { + o.apply(&opts) + } + s := &Server{ + lis: make(map[net.Listener]bool), + opts: opts, + conns: make(map[transport.ServerTransport]bool), + services: make(map[string]*serviceInfo), + quit: grpcsync.NewEvent(), + done: grpcsync.NewEvent(), + czData: new(channelzData), + } + chainUnaryServerInterceptors(s) + chainStreamServerInterceptors(s) + s.cv = sync.NewCond(&s.mu) + if EnableTracing { + _, file, line, _ := runtime.Caller(1) + s.events = trace.NewEventLog("grpc.Server", fmt.Sprintf("%s:%d", file, line)) + } + + if s.opts.numServerWorkers > 0 { + s.initServerWorkers() + } + + if channelz.IsOn() { + s.channelzID = channelz.RegisterServer(&channelzServer{s}, "") + } + return s +} + +// printf records an event in s's event log, unless s has been stopped. +// REQUIRES s.mu is held. +func (s *Server) printf(format string, a ...interface{}) { + if s.events != nil { + s.events.Printf(format, a...) + } +} + +// errorf records an error in s's event log, unless s has been stopped. +// REQUIRES s.mu is held. +func (s *Server) errorf(format string, a ...interface{}) { + if s.events != nil { + s.events.Errorf(format, a...) + } +} + +// ServiceRegistrar wraps a single method that supports service registration. It +// enables users to pass concrete types other than grpc.Server to the service +// registration methods exported by the IDL generated code. +type ServiceRegistrar interface { + // RegisterService registers a service and its implementation to the + // concrete type implementing this interface. It may not be called + // once the server has started serving. + // desc describes the service and its methods and handlers. impl is the + // service implementation which is passed to the method handlers. + RegisterService(desc *ServiceDesc, impl interface{}) +} + +// RegisterService registers a service and its implementation to the gRPC +// server. It is called from the IDL generated code. This must be called before +// invoking Serve. If ss is non-nil (for legacy code), its type is checked to +// ensure it implements sd.HandlerType. +func (s *Server) RegisterService(sd *ServiceDesc, ss interface{}) { + if ss != nil { + ht := reflect.TypeOf(sd.HandlerType).Elem() + st := reflect.TypeOf(ss) + if !st.Implements(ht) { + logger.Fatalf("grpc: Server.RegisterService found the handler of type %v that does not satisfy %v", st, ht) + } + } + s.register(sd, ss) +} + +func (s *Server) register(sd *ServiceDesc, ss interface{}) { + s.mu.Lock() + defer s.mu.Unlock() + s.printf("RegisterService(%q)", sd.ServiceName) + if s.serve { + logger.Fatalf("grpc: Server.RegisterService after Server.Serve for %q", sd.ServiceName) + } + if _, ok := s.services[sd.ServiceName]; ok { + logger.Fatalf("grpc: Server.RegisterService found duplicate service registration for %q", sd.ServiceName) + } + info := &serviceInfo{ + serviceImpl: ss, + methods: make(map[string]*MethodDesc), + streams: make(map[string]*StreamDesc), + mdata: sd.Metadata, + } + for i := range sd.Methods { + d := &sd.Methods[i] + info.methods[d.MethodName] = d + } + for i := range sd.Streams { + d := &sd.Streams[i] + info.streams[d.StreamName] = d + } + s.services[sd.ServiceName] = info +} + +// MethodInfo contains the information of an RPC including its method name and type. +type MethodInfo struct { + // Name is the method name only, without the service name or package name. + Name string + // IsClientStream indicates whether the RPC is a client streaming RPC. + IsClientStream bool + // IsServerStream indicates whether the RPC is a server streaming RPC. + IsServerStream bool +} + +// ServiceInfo contains unary RPC method info, streaming RPC method info and metadata for a service. +type ServiceInfo struct { + Methods []MethodInfo + // Metadata is the metadata specified in ServiceDesc when registering service. + Metadata interface{} +} + +// GetServiceInfo returns a map from service names to ServiceInfo. +// Service names include the package names, in the form of .. +func (s *Server) GetServiceInfo() map[string]ServiceInfo { + ret := make(map[string]ServiceInfo) + for n, srv := range s.services { + methods := make([]MethodInfo, 0, len(srv.methods)+len(srv.streams)) + for m := range srv.methods { + methods = append(methods, MethodInfo{ + Name: m, + IsClientStream: false, + IsServerStream: false, + }) + } + for m, d := range srv.streams { + methods = append(methods, MethodInfo{ + Name: m, + IsClientStream: d.ClientStreams, + IsServerStream: d.ServerStreams, + }) + } + + ret[n] = ServiceInfo{ + Methods: methods, + Metadata: srv.mdata, + } + } + return ret +} + +// ErrServerStopped indicates that the operation is now illegal because of +// the server being stopped. +var ErrServerStopped = errors.New("grpc: the server has been stopped") + +func (s *Server) useTransportAuthenticator(rawConn net.Conn) (net.Conn, credentials.AuthInfo, error) { + if s.opts.creds == nil { + return rawConn, nil, nil + } + return s.opts.creds.ServerHandshake(rawConn) +} + +type listenSocket struct { + net.Listener + channelzID int64 +} + +func (l *listenSocket) ChannelzMetric() *channelz.SocketInternalMetric { + return &channelz.SocketInternalMetric{ + SocketOptions: channelz.GetSocketOption(l.Listener), + LocalAddr: l.Listener.Addr(), + } +} + +func (l *listenSocket) Close() error { + err := l.Listener.Close() + if channelz.IsOn() { + channelz.RemoveEntry(l.channelzID) + } + return err +} + +// Serve accepts incoming connections on the listener lis, creating a new +// ServerTransport and service goroutine for each. The service goroutines +// read gRPC requests and then call the registered handlers to reply to them. +// Serve returns when lis.Accept fails with fatal errors. lis will be closed when +// this method returns. +// Serve will return a non-nil error unless Stop or GracefulStop is called. +func (s *Server) Serve(lis net.Listener) error { + s.mu.Lock() + s.printf("serving") + s.serve = true + if s.lis == nil { + // Serve called after Stop or GracefulStop. + s.mu.Unlock() + lis.Close() + return ErrServerStopped + } + + s.serveWG.Add(1) + defer func() { + s.serveWG.Done() + if s.quit.HasFired() { + // Stop or GracefulStop called; block until done and return nil. + <-s.done.Done() + } + }() + + ls := &listenSocket{Listener: lis} + s.lis[ls] = true + + if channelz.IsOn() { + ls.channelzID = channelz.RegisterListenSocket(ls, s.channelzID, lis.Addr().String()) + } + s.mu.Unlock() + + defer func() { + s.mu.Lock() + if s.lis != nil && s.lis[ls] { + ls.Close() + delete(s.lis, ls) + } + s.mu.Unlock() + }() + + var tempDelay time.Duration // how long to sleep on accept failure + + for { + rawConn, err := lis.Accept() + if err != nil { + if ne, ok := err.(interface { + Temporary() bool + }); ok && ne.Temporary() { + if tempDelay == 0 { + tempDelay = 5 * time.Millisecond + } else { + tempDelay *= 2 + } + if max := 1 * time.Second; tempDelay > max { + tempDelay = max + } + s.mu.Lock() + s.printf("Accept error: %v; retrying in %v", err, tempDelay) + s.mu.Unlock() + timer := time.NewTimer(tempDelay) + select { + case <-timer.C: + case <-s.quit.Done(): + timer.Stop() + return nil + } + continue + } + s.mu.Lock() + s.printf("done serving; Accept = %v", err) + s.mu.Unlock() + + if s.quit.HasFired() { + return nil + } + return err + } + tempDelay = 0 + // Start a new goroutine to deal with rawConn so we don't stall this Accept + // loop goroutine. + // + // Make sure we account for the goroutine so GracefulStop doesn't nil out + // s.conns before this conn can be added. + s.serveWG.Add(1) + go func() { + s.handleRawConn(rawConn) + s.serveWG.Done() + }() + } +} + +// handleRawConn forks a goroutine to handle a just-accepted connection that +// has not had any I/O performed on it yet. +func (s *Server) handleRawConn(rawConn net.Conn) { + if s.quit.HasFired() { + rawConn.Close() + return + } + rawConn.SetDeadline(time.Now().Add(s.opts.connectionTimeout)) + conn, authInfo, err := s.useTransportAuthenticator(rawConn) + if err != nil { + // ErrConnDispatched means that the connection was dispatched away from + // gRPC; those connections should be left open. + if err != credentials.ErrConnDispatched { + s.mu.Lock() + s.errorf("ServerHandshake(%q) failed: %v", rawConn.RemoteAddr(), err) + s.mu.Unlock() + channelz.Warningf(logger, s.channelzID, "grpc: Server.Serve failed to complete security handshake from %q: %v", rawConn.RemoteAddr(), err) + rawConn.Close() + } + rawConn.SetDeadline(time.Time{}) + return + } + + // Finish handshaking (HTTP2) + st := s.newHTTP2Transport(conn, authInfo) + if st == nil { + return + } + + rawConn.SetDeadline(time.Time{}) + if !s.addConn(st) { + return + } + go func() { + s.serveStreams(st) + s.removeConn(st) + }() +} + +// newHTTP2Transport sets up a http/2 transport (using the +// gRPC http2 server transport in transport/http2_server.go). +func (s *Server) newHTTP2Transport(c net.Conn, authInfo credentials.AuthInfo) transport.ServerTransport { + config := &transport.ServerConfig{ + MaxStreams: s.opts.maxConcurrentStreams, + AuthInfo: authInfo, + InTapHandle: s.opts.inTapHandle, + StatsHandler: s.opts.statsHandler, + KeepaliveParams: s.opts.keepaliveParams, + KeepalivePolicy: s.opts.keepalivePolicy, + InitialWindowSize: s.opts.initialWindowSize, + InitialConnWindowSize: s.opts.initialConnWindowSize, + WriteBufferSize: s.opts.writeBufferSize, + ReadBufferSize: s.opts.readBufferSize, + ChannelzParentID: s.channelzID, + MaxHeaderListSize: s.opts.maxHeaderListSize, + HeaderTableSize: s.opts.headerTableSize, + } + st, err := transport.NewServerTransport("http2", c, config) + if err != nil { + s.mu.Lock() + s.errorf("NewServerTransport(%q) failed: %v", c.RemoteAddr(), err) + s.mu.Unlock() + c.Close() + channelz.Warning(logger, s.channelzID, "grpc: Server.Serve failed to create ServerTransport: ", err) + return nil + } + + return st +} + +func (s *Server) serveStreams(st transport.ServerTransport) { + defer st.Close() + var wg sync.WaitGroup + + var roundRobinCounter uint32 + st.HandleStreams(func(stream *transport.Stream) { + wg.Add(1) + if s.opts.numServerWorkers > 0 { + data := &serverWorkerData{st: st, wg: &wg, stream: stream} + select { + case s.serverWorkerChannels[atomic.AddUint32(&roundRobinCounter, 1)%s.opts.numServerWorkers] <- data: + default: + // If all stream workers are busy, fallback to the default code path. + go func() { + s.handleStream(st, stream, s.traceInfo(st, stream)) + wg.Done() + }() + } + } else { + go func() { + defer wg.Done() + s.handleStream(st, stream, s.traceInfo(st, stream)) + }() + } + }, func(ctx context.Context, method string) context.Context { + if !EnableTracing { + return ctx + } + tr := trace.New("grpc.Recv."+methodFamily(method), method) + return trace.NewContext(ctx, tr) + }) + wg.Wait() +} + +var _ http.Handler = (*Server)(nil) + +// ServeHTTP implements the Go standard library's http.Handler +// interface by responding to the gRPC request r, by looking up +// the requested gRPC method in the gRPC server s. +// +// The provided HTTP request must have arrived on an HTTP/2 +// connection. When using the Go standard library's server, +// practically this means that the Request must also have arrived +// over TLS. +// +// To share one port (such as 443 for https) between gRPC and an +// existing http.Handler, use a root http.Handler such as: +// +// if r.ProtoMajor == 2 && strings.HasPrefix( +// r.Header.Get("Content-Type"), "application/grpc") { +// grpcServer.ServeHTTP(w, r) +// } else { +// yourMux.ServeHTTP(w, r) +// } +// +// Note that ServeHTTP uses Go's HTTP/2 server implementation which is totally +// separate from grpc-go's HTTP/2 server. Performance and features may vary +// between the two paths. ServeHTTP does not support some gRPC features +// available through grpc-go's HTTP/2 server. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) { + st, err := transport.NewServerHandlerTransport(w, r, s.opts.statsHandler) + if err != nil { + http.Error(w, err.Error(), http.StatusInternalServerError) + return + } + if !s.addConn(st) { + return + } + defer s.removeConn(st) + s.serveStreams(st) +} + +// traceInfo returns a traceInfo and associates it with stream, if tracing is enabled. +// If tracing is not enabled, it returns nil. +func (s *Server) traceInfo(st transport.ServerTransport, stream *transport.Stream) (trInfo *traceInfo) { + if !EnableTracing { + return nil + } + tr, ok := trace.FromContext(stream.Context()) + if !ok { + return nil + } + + trInfo = &traceInfo{ + tr: tr, + firstLine: firstLine{ + client: false, + remoteAddr: st.RemoteAddr(), + }, + } + if dl, ok := stream.Context().Deadline(); ok { + trInfo.firstLine.deadline = time.Until(dl) + } + return trInfo +} + +func (s *Server) addConn(st transport.ServerTransport) bool { + s.mu.Lock() + defer s.mu.Unlock() + if s.conns == nil { + st.Close() + return false + } + if s.drain { + // Transport added after we drained our existing conns: drain it + // immediately. + st.Drain() + } + s.conns[st] = true + return true +} + +func (s *Server) removeConn(st transport.ServerTransport) { + s.mu.Lock() + defer s.mu.Unlock() + if s.conns != nil { + delete(s.conns, st) + s.cv.Broadcast() + } +} + +func (s *Server) channelzMetric() *channelz.ServerInternalMetric { + return &channelz.ServerInternalMetric{ + CallsStarted: atomic.LoadInt64(&s.czData.callsStarted), + CallsSucceeded: atomic.LoadInt64(&s.czData.callsSucceeded), + CallsFailed: atomic.LoadInt64(&s.czData.callsFailed), + LastCallStartedTimestamp: time.Unix(0, atomic.LoadInt64(&s.czData.lastCallStartedTime)), + } +} + +func (s *Server) incrCallsStarted() { + atomic.AddInt64(&s.czData.callsStarted, 1) + atomic.StoreInt64(&s.czData.lastCallStartedTime, time.Now().UnixNano()) +} + +func (s *Server) incrCallsSucceeded() { + atomic.AddInt64(&s.czData.callsSucceeded, 1) +} + +func (s *Server) incrCallsFailed() { + atomic.AddInt64(&s.czData.callsFailed, 1) +} + +func (s *Server) sendResponse(t transport.ServerTransport, stream *transport.Stream, msg interface{}, cp Compressor, opts *transport.Options, comp encoding.Compressor) error { + data, err := encode(s.getCodec(stream.ContentSubtype()), msg) + if err != nil { + channelz.Error(logger, s.channelzID, "grpc: server failed to encode response: ", err) + return err + } + compData, err := compress(data, cp, comp) + if err != nil { + channelz.Error(logger, s.channelzID, "grpc: server failed to compress response: ", err) + return err + } + hdr, payload := msgHeader(data, compData) + // TODO(dfawley): should we be checking len(data) instead? + if len(payload) > s.opts.maxSendMessageSize { + return status.Errorf(codes.ResourceExhausted, "grpc: trying to send message larger than max (%d vs. %d)", len(payload), s.opts.maxSendMessageSize) + } + err = t.Write(stream, hdr, payload, opts) + if err == nil && s.opts.statsHandler != nil { + s.opts.statsHandler.HandleRPC(stream.Context(), outPayload(false, msg, data, payload, time.Now())) + } + return err +} + +// chainUnaryServerInterceptors chains all unary server interceptors into one. +func chainUnaryServerInterceptors(s *Server) { + // Prepend opts.unaryInt to the chaining interceptors if it exists, since unaryInt will + // be executed before any other chained interceptors. + interceptors := s.opts.chainUnaryInts + if s.opts.unaryInt != nil { + interceptors = append([]UnaryServerInterceptor{s.opts.unaryInt}, s.opts.chainUnaryInts...) + } + + var chainedInt UnaryServerInterceptor + if len(interceptors) == 0 { + chainedInt = nil + } else if len(interceptors) == 1 { + chainedInt = interceptors[0] + } else { + chainedInt = func(ctx context.Context, req interface{}, info *UnaryServerInfo, handler UnaryHandler) (interface{}, error) { + return interceptors[0](ctx, req, info, getChainUnaryHandler(interceptors, 0, info, handler)) + } + } + + s.opts.unaryInt = chainedInt +} + +// getChainUnaryHandler recursively generate the chained UnaryHandler +func getChainUnaryHandler(interceptors []UnaryServerInterceptor, curr int, info *UnaryServerInfo, finalHandler UnaryHandler) UnaryHandler { + if curr == len(interceptors)-1 { + return finalHandler + } + + return func(ctx context.Context, req interface{}) (interface{}, error) { + return interceptors[curr+1](ctx, req, info, getChainUnaryHandler(interceptors, curr+1, info, finalHandler)) + } +} + +func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.Stream, info *serviceInfo, md *MethodDesc, trInfo *traceInfo) (err error) { + sh := s.opts.statsHandler + if sh != nil || trInfo != nil || channelz.IsOn() { + if channelz.IsOn() { + s.incrCallsStarted() + } + var statsBegin *stats.Begin + if sh != nil { + beginTime := time.Now() + statsBegin = &stats.Begin{ + BeginTime: beginTime, + } + sh.HandleRPC(stream.Context(), statsBegin) + } + if trInfo != nil { + trInfo.tr.LazyLog(&trInfo.firstLine, false) + } + // The deferred error handling for tracing, stats handler and channelz are + // combined into one function to reduce stack usage -- a defer takes ~56-64 + // bytes on the stack, so overflowing the stack will require a stack + // re-allocation, which is expensive. + // + // To maintain behavior similar to separate deferred statements, statements + // should be executed in the reverse order. That is, tracing first, stats + // handler second, and channelz last. Note that panics *within* defers will + // lead to different behavior, but that's an acceptable compromise; that + // would be undefined behavior territory anyway. + defer func() { + if trInfo != nil { + if err != nil && err != io.EOF { + trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true) + trInfo.tr.SetError() + } + trInfo.tr.Finish() + } + + if sh != nil { + end := &stats.End{ + BeginTime: statsBegin.BeginTime, + EndTime: time.Now(), + } + if err != nil && err != io.EOF { + end.Error = toRPCErr(err) + } + sh.HandleRPC(stream.Context(), end) + } + + if channelz.IsOn() { + if err != nil && err != io.EOF { + s.incrCallsFailed() + } else { + s.incrCallsSucceeded() + } + } + }() + } + + binlog := binarylog.GetMethodLogger(stream.Method()) + if binlog != nil { + ctx := stream.Context() + md, _ := metadata.FromIncomingContext(ctx) + logEntry := &binarylog.ClientHeader{ + Header: md, + MethodName: stream.Method(), + PeerAddr: nil, + } + if deadline, ok := ctx.Deadline(); ok { + logEntry.Timeout = time.Until(deadline) + if logEntry.Timeout < 0 { + logEntry.Timeout = 0 + } + } + if a := md[":authority"]; len(a) > 0 { + logEntry.Authority = a[0] + } + if peer, ok := peer.FromContext(ctx); ok { + logEntry.PeerAddr = peer.Addr + } + binlog.Log(logEntry) + } + + // comp and cp are used for compression. decomp and dc are used for + // decompression. If comp and decomp are both set, they are the same; + // however they are kept separate to ensure that at most one of the + // compressor/decompressor variable pairs are set for use later. + var comp, decomp encoding.Compressor + var cp Compressor + var dc Decompressor + + // If dc is set and matches the stream's compression, use it. Otherwise, try + // to find a matching registered compressor for decomp. + if rc := stream.RecvCompress(); s.opts.dc != nil && s.opts.dc.Type() == rc { + dc = s.opts.dc + } else if rc != "" && rc != encoding.Identity { + decomp = encoding.GetCompressor(rc) + if decomp == nil { + st := status.Newf(codes.Unimplemented, "grpc: Decompressor is not installed for grpc-encoding %q", rc) + t.WriteStatus(stream, st) + return st.Err() + } + } + + // If cp is set, use it. Otherwise, attempt to compress the response using + // the incoming message compression method. + // + // NOTE: this needs to be ahead of all handling, https://github.com/grpc/grpc-go/issues/686. + if s.opts.cp != nil { + cp = s.opts.cp + stream.SetSendCompress(cp.Type()) + } else if rc := stream.RecvCompress(); rc != "" && rc != encoding.Identity { + // Legacy compressor not specified; attempt to respond with same encoding. + comp = encoding.GetCompressor(rc) + if comp != nil { + stream.SetSendCompress(rc) + } + } + + var payInfo *payloadInfo + if sh != nil || binlog != nil { + payInfo = &payloadInfo{} + } + d, err := recvAndDecompress(&parser{r: stream}, stream, dc, s.opts.maxReceiveMessageSize, payInfo, decomp) + if err != nil { + if e := t.WriteStatus(stream, status.Convert(err)); e != nil { + channelz.Warningf(logger, s.channelzID, "grpc: Server.processUnaryRPC failed to write status %v", e) + } + return err + } + if channelz.IsOn() { + t.IncrMsgRecv() + } + df := func(v interface{}) error { + if err := s.getCodec(stream.ContentSubtype()).Unmarshal(d, v); err != nil { + return status.Errorf(codes.Internal, "grpc: error unmarshalling request: %v", err) + } + if sh != nil { + sh.HandleRPC(stream.Context(), &stats.InPayload{ + RecvTime: time.Now(), + Payload: v, + WireLength: payInfo.wireLength + headerLen, + Data: d, + Length: len(d), + }) + } + if binlog != nil { + binlog.Log(&binarylog.ClientMessage{ + Message: d, + }) + } + if trInfo != nil { + trInfo.tr.LazyLog(&payload{sent: false, msg: v}, true) + } + return nil + } + ctx := NewContextWithServerTransportStream(stream.Context(), stream) + reply, appErr := md.Handler(info.serviceImpl, ctx, df, s.opts.unaryInt) + if appErr != nil { + appStatus, ok := status.FromError(appErr) + if !ok { + // Convert appErr if it is not a grpc status error. + appErr = status.Error(codes.Unknown, appErr.Error()) + appStatus, _ = status.FromError(appErr) + } + if trInfo != nil { + trInfo.tr.LazyLog(stringer(appStatus.Message()), true) + trInfo.tr.SetError() + } + if e := t.WriteStatus(stream, appStatus); e != nil { + channelz.Warningf(logger, s.channelzID, "grpc: Server.processUnaryRPC failed to write status: %v", e) + } + if binlog != nil { + if h, _ := stream.Header(); h.Len() > 0 { + // Only log serverHeader if there was header. Otherwise it can + // be trailer only. + binlog.Log(&binarylog.ServerHeader{ + Header: h, + }) + } + binlog.Log(&binarylog.ServerTrailer{ + Trailer: stream.Trailer(), + Err: appErr, + }) + } + return appErr + } + if trInfo != nil { + trInfo.tr.LazyLog(stringer("OK"), false) + } + opts := &transport.Options{Last: true} + + if err := s.sendResponse(t, stream, reply, cp, opts, comp); err != nil { + if err == io.EOF { + // The entire stream is done (for unary RPC only). + return err + } + if sts, ok := status.FromError(err); ok { + if e := t.WriteStatus(stream, sts); e != nil { + channelz.Warningf(logger, s.channelzID, "grpc: Server.processUnaryRPC failed to write status: %v", e) + } + } else { + switch st := err.(type) { + case transport.ConnectionError: + // Nothing to do here. + default: + panic(fmt.Sprintf("grpc: Unexpected error (%T) from sendResponse: %v", st, st)) + } + } + if binlog != nil { + h, _ := stream.Header() + binlog.Log(&binarylog.ServerHeader{ + Header: h, + }) + binlog.Log(&binarylog.ServerTrailer{ + Trailer: stream.Trailer(), + Err: appErr, + }) + } + return err + } + if binlog != nil { + h, _ := stream.Header() + binlog.Log(&binarylog.ServerHeader{ + Header: h, + }) + binlog.Log(&binarylog.ServerMessage{ + Message: reply, + }) + } + if channelz.IsOn() { + t.IncrMsgSent() + } + if trInfo != nil { + trInfo.tr.LazyLog(&payload{sent: true, msg: reply}, true) + } + // TODO: Should we be logging if writing status failed here, like above? + // Should the logging be in WriteStatus? Should we ignore the WriteStatus + // error or allow the stats handler to see it? + err = t.WriteStatus(stream, statusOK) + if binlog != nil { + binlog.Log(&binarylog.ServerTrailer{ + Trailer: stream.Trailer(), + Err: appErr, + }) + } + return err +} + +// chainStreamServerInterceptors chains all stream server interceptors into one. +func chainStreamServerInterceptors(s *Server) { + // Prepend opts.streamInt to the chaining interceptors if it exists, since streamInt will + // be executed before any other chained interceptors. + interceptors := s.opts.chainStreamInts + if s.opts.streamInt != nil { + interceptors = append([]StreamServerInterceptor{s.opts.streamInt}, s.opts.chainStreamInts...) + } + + var chainedInt StreamServerInterceptor + if len(interceptors) == 0 { + chainedInt = nil + } else if len(interceptors) == 1 { + chainedInt = interceptors[0] + } else { + chainedInt = func(srv interface{}, ss ServerStream, info *StreamServerInfo, handler StreamHandler) error { + return interceptors[0](srv, ss, info, getChainStreamHandler(interceptors, 0, info, handler)) + } + } + + s.opts.streamInt = chainedInt +} + +// getChainStreamHandler recursively generate the chained StreamHandler +func getChainStreamHandler(interceptors []StreamServerInterceptor, curr int, info *StreamServerInfo, finalHandler StreamHandler) StreamHandler { + if curr == len(interceptors)-1 { + return finalHandler + } + + return func(srv interface{}, ss ServerStream) error { + return interceptors[curr+1](srv, ss, info, getChainStreamHandler(interceptors, curr+1, info, finalHandler)) + } +} + +func (s *Server) processStreamingRPC(t transport.ServerTransport, stream *transport.Stream, info *serviceInfo, sd *StreamDesc, trInfo *traceInfo) (err error) { + if channelz.IsOn() { + s.incrCallsStarted() + } + sh := s.opts.statsHandler + var statsBegin *stats.Begin + if sh != nil { + beginTime := time.Now() + statsBegin = &stats.Begin{ + BeginTime: beginTime, + } + sh.HandleRPC(stream.Context(), statsBegin) + } + ctx := NewContextWithServerTransportStream(stream.Context(), stream) + ss := &serverStream{ + ctx: ctx, + t: t, + s: stream, + p: &parser{r: stream}, + codec: s.getCodec(stream.ContentSubtype()), + maxReceiveMessageSize: s.opts.maxReceiveMessageSize, + maxSendMessageSize: s.opts.maxSendMessageSize, + trInfo: trInfo, + statsHandler: sh, + } + + if sh != nil || trInfo != nil || channelz.IsOn() { + // See comment in processUnaryRPC on defers. + defer func() { + if trInfo != nil { + ss.mu.Lock() + if err != nil && err != io.EOF { + ss.trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true) + ss.trInfo.tr.SetError() + } + ss.trInfo.tr.Finish() + ss.trInfo.tr = nil + ss.mu.Unlock() + } + + if sh != nil { + end := &stats.End{ + BeginTime: statsBegin.BeginTime, + EndTime: time.Now(), + } + if err != nil && err != io.EOF { + end.Error = toRPCErr(err) + } + sh.HandleRPC(stream.Context(), end) + } + + if channelz.IsOn() { + if err != nil && err != io.EOF { + s.incrCallsFailed() + } else { + s.incrCallsSucceeded() + } + } + }() + } + + ss.binlog = binarylog.GetMethodLogger(stream.Method()) + if ss.binlog != nil { + md, _ := metadata.FromIncomingContext(ctx) + logEntry := &binarylog.ClientHeader{ + Header: md, + MethodName: stream.Method(), + PeerAddr: nil, + } + if deadline, ok := ctx.Deadline(); ok { + logEntry.Timeout = time.Until(deadline) + if logEntry.Timeout < 0 { + logEntry.Timeout = 0 + } + } + if a := md[":authority"]; len(a) > 0 { + logEntry.Authority = a[0] + } + if peer, ok := peer.FromContext(ss.Context()); ok { + logEntry.PeerAddr = peer.Addr + } + ss.binlog.Log(logEntry) + } + + // If dc is set and matches the stream's compression, use it. Otherwise, try + // to find a matching registered compressor for decomp. + if rc := stream.RecvCompress(); s.opts.dc != nil && s.opts.dc.Type() == rc { + ss.dc = s.opts.dc + } else if rc != "" && rc != encoding.Identity { + ss.decomp = encoding.GetCompressor(rc) + if ss.decomp == nil { + st := status.Newf(codes.Unimplemented, "grpc: Decompressor is not installed for grpc-encoding %q", rc) + t.WriteStatus(ss.s, st) + return st.Err() + } + } + + // If cp is set, use it. Otherwise, attempt to compress the response using + // the incoming message compression method. + // + // NOTE: this needs to be ahead of all handling, https://github.com/grpc/grpc-go/issues/686. + if s.opts.cp != nil { + ss.cp = s.opts.cp + stream.SetSendCompress(s.opts.cp.Type()) + } else if rc := stream.RecvCompress(); rc != "" && rc != encoding.Identity { + // Legacy compressor not specified; attempt to respond with same encoding. + ss.comp = encoding.GetCompressor(rc) + if ss.comp != nil { + stream.SetSendCompress(rc) + } + } + + if trInfo != nil { + trInfo.tr.LazyLog(&trInfo.firstLine, false) + } + var appErr error + var server interface{} + if info != nil { + server = info.serviceImpl + } + if s.opts.streamInt == nil { + appErr = sd.Handler(server, ss) + } else { + info := &StreamServerInfo{ + FullMethod: stream.Method(), + IsClientStream: sd.ClientStreams, + IsServerStream: sd.ServerStreams, + } + appErr = s.opts.streamInt(server, ss, info, sd.Handler) + } + if appErr != nil { + appStatus, ok := status.FromError(appErr) + if !ok { + appStatus = status.New(codes.Unknown, appErr.Error()) + appErr = appStatus.Err() + } + if trInfo != nil { + ss.mu.Lock() + ss.trInfo.tr.LazyLog(stringer(appStatus.Message()), true) + ss.trInfo.tr.SetError() + ss.mu.Unlock() + } + t.WriteStatus(ss.s, appStatus) + if ss.binlog != nil { + ss.binlog.Log(&binarylog.ServerTrailer{ + Trailer: ss.s.Trailer(), + Err: appErr, + }) + } + // TODO: Should we log an error from WriteStatus here and below? + return appErr + } + if trInfo != nil { + ss.mu.Lock() + ss.trInfo.tr.LazyLog(stringer("OK"), false) + ss.mu.Unlock() + } + err = t.WriteStatus(ss.s, statusOK) + if ss.binlog != nil { + ss.binlog.Log(&binarylog.ServerTrailer{ + Trailer: ss.s.Trailer(), + Err: appErr, + }) + } + return err +} + +func (s *Server) handleStream(t transport.ServerTransport, stream *transport.Stream, trInfo *traceInfo) { + sm := stream.Method() + if sm != "" && sm[0] == '/' { + sm = sm[1:] + } + pos := strings.LastIndex(sm, "/") + if pos == -1 { + if trInfo != nil { + trInfo.tr.LazyLog(&fmtStringer{"Malformed method name %q", []interface{}{sm}}, true) + trInfo.tr.SetError() + } + errDesc := fmt.Sprintf("malformed method name: %q", stream.Method()) + if err := t.WriteStatus(stream, status.New(codes.ResourceExhausted, errDesc)); err != nil { + if trInfo != nil { + trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true) + trInfo.tr.SetError() + } + channelz.Warningf(logger, s.channelzID, "grpc: Server.handleStream failed to write status: %v", err) + } + if trInfo != nil { + trInfo.tr.Finish() + } + return + } + service := sm[:pos] + method := sm[pos+1:] + + srv, knownService := s.services[service] + if knownService { + if md, ok := srv.methods[method]; ok { + s.processUnaryRPC(t, stream, srv, md, trInfo) + return + } + if sd, ok := srv.streams[method]; ok { + s.processStreamingRPC(t, stream, srv, sd, trInfo) + return + } + } + // Unknown service, or known server unknown method. + if unknownDesc := s.opts.unknownStreamDesc; unknownDesc != nil { + s.processStreamingRPC(t, stream, nil, unknownDesc, trInfo) + return + } + var errDesc string + if !knownService { + errDesc = fmt.Sprintf("unknown service %v", service) + } else { + errDesc = fmt.Sprintf("unknown method %v for service %v", method, service) + } + if trInfo != nil { + trInfo.tr.LazyPrintf("%s", errDesc) + trInfo.tr.SetError() + } + if err := t.WriteStatus(stream, status.New(codes.Unimplemented, errDesc)); err != nil { + if trInfo != nil { + trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true) + trInfo.tr.SetError() + } + channelz.Warningf(logger, s.channelzID, "grpc: Server.handleStream failed to write status: %v", err) + } + if trInfo != nil { + trInfo.tr.Finish() + } +} + +// The key to save ServerTransportStream in the context. +type streamKey struct{} + +// NewContextWithServerTransportStream creates a new context from ctx and +// attaches stream to it. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func NewContextWithServerTransportStream(ctx context.Context, stream ServerTransportStream) context.Context { + return context.WithValue(ctx, streamKey{}, stream) +} + +// ServerTransportStream is a minimal interface that a transport stream must +// implement. This can be used to mock an actual transport stream for tests of +// handler code that use, for example, grpc.SetHeader (which requires some +// stream to be in context). +// +// See also NewContextWithServerTransportStream. +// +// Experimental +// +// Notice: This type is EXPERIMENTAL and may be changed or removed in a +// later release. +type ServerTransportStream interface { + Method() string + SetHeader(md metadata.MD) error + SendHeader(md metadata.MD) error + SetTrailer(md metadata.MD) error +} + +// ServerTransportStreamFromContext returns the ServerTransportStream saved in +// ctx. Returns nil if the given context has no stream associated with it +// (which implies it is not an RPC invocation context). +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +func ServerTransportStreamFromContext(ctx context.Context) ServerTransportStream { + s, _ := ctx.Value(streamKey{}).(ServerTransportStream) + return s +} + +// Stop stops the gRPC server. It immediately closes all open +// connections and listeners. +// It cancels all active RPCs on the server side and the corresponding +// pending RPCs on the client side will get notified by connection +// errors. +func (s *Server) Stop() { + s.quit.Fire() + + defer func() { + s.serveWG.Wait() + s.done.Fire() + }() + + s.channelzRemoveOnce.Do(func() { + if channelz.IsOn() { + channelz.RemoveEntry(s.channelzID) + } + }) + + s.mu.Lock() + listeners := s.lis + s.lis = nil + st := s.conns + s.conns = nil + // interrupt GracefulStop if Stop and GracefulStop are called concurrently. + s.cv.Broadcast() + s.mu.Unlock() + + for lis := range listeners { + lis.Close() + } + for c := range st { + c.Close() + } + if s.opts.numServerWorkers > 0 { + s.stopServerWorkers() + } + + s.mu.Lock() + if s.events != nil { + s.events.Finish() + s.events = nil + } + s.mu.Unlock() +} + +// GracefulStop stops the gRPC server gracefully. It stops the server from +// accepting new connections and RPCs and blocks until all the pending RPCs are +// finished. +func (s *Server) GracefulStop() { + s.quit.Fire() + defer s.done.Fire() + + s.channelzRemoveOnce.Do(func() { + if channelz.IsOn() { + channelz.RemoveEntry(s.channelzID) + } + }) + s.mu.Lock() + if s.conns == nil { + s.mu.Unlock() + return + } + + for lis := range s.lis { + lis.Close() + } + s.lis = nil + if !s.drain { + for st := range s.conns { + st.Drain() + } + s.drain = true + } + + // Wait for serving threads to be ready to exit. Only then can we be sure no + // new conns will be created. + s.mu.Unlock() + s.serveWG.Wait() + s.mu.Lock() + + for len(s.conns) != 0 { + s.cv.Wait() + } + s.conns = nil + if s.events != nil { + s.events.Finish() + s.events = nil + } + s.mu.Unlock() +} + +// contentSubtype must be lowercase +// cannot return nil +func (s *Server) getCodec(contentSubtype string) baseCodec { + if s.opts.codec != nil { + return s.opts.codec + } + if contentSubtype == "" { + return encoding.GetCodec(proto.Name) + } + codec := encoding.GetCodec(contentSubtype) + if codec == nil { + return encoding.GetCodec(proto.Name) + } + return codec +} + +// SetHeader sets the header metadata. +// When called multiple times, all the provided metadata will be merged. +// All the metadata will be sent out when one of the following happens: +// - grpc.SendHeader() is called; +// - The first response is sent out; +// - An RPC status is sent out (error or success). +func SetHeader(ctx context.Context, md metadata.MD) error { + if md.Len() == 0 { + return nil + } + stream := ServerTransportStreamFromContext(ctx) + if stream == nil { + return status.Errorf(codes.Internal, "grpc: failed to fetch the stream from the context %v", ctx) + } + return stream.SetHeader(md) +} + +// SendHeader sends header metadata. It may be called at most once. +// The provided md and headers set by SetHeader() will be sent. +func SendHeader(ctx context.Context, md metadata.MD) error { + stream := ServerTransportStreamFromContext(ctx) + if stream == nil { + return status.Errorf(codes.Internal, "grpc: failed to fetch the stream from the context %v", ctx) + } + if err := stream.SendHeader(md); err != nil { + return toRPCErr(err) + } + return nil +} + +// SetTrailer sets the trailer metadata that will be sent when an RPC returns. +// When called more than once, all the provided metadata will be merged. +func SetTrailer(ctx context.Context, md metadata.MD) error { + if md.Len() == 0 { + return nil + } + stream := ServerTransportStreamFromContext(ctx) + if stream == nil { + return status.Errorf(codes.Internal, "grpc: failed to fetch the stream from the context %v", ctx) + } + return stream.SetTrailer(md) +} + +// Method returns the method string for the server context. The returned +// string is in the format of "/service/method". +func Method(ctx context.Context) (string, bool) { + s := ServerTransportStreamFromContext(ctx) + if s == nil { + return "", false + } + return s.Method(), true +} + +type channelzServer struct { + s *Server +} + +func (c *channelzServer) ChannelzMetric() *channelz.ServerInternalMetric { + return c.s.channelzMetric() +} diff --git a/vendor/google.golang.org/grpc/service_config.go b/vendor/google.golang.org/grpc/service_config.go new file mode 100644 index 000000000..5e434ca7f --- /dev/null +++ b/vendor/google.golang.org/grpc/service_config.go @@ -0,0 +1,454 @@ +/* + * + * Copyright 2017 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpc + +import ( + "encoding/json" + "errors" + "fmt" + "reflect" + "strconv" + "strings" + "time" + + "google.golang.org/grpc/codes" + "google.golang.org/grpc/internal" + internalserviceconfig "google.golang.org/grpc/internal/serviceconfig" + "google.golang.org/grpc/serviceconfig" +) + +const maxInt = int(^uint(0) >> 1) + +// MethodConfig defines the configuration recommended by the service providers for a +// particular method. +// +// Deprecated: Users should not use this struct. Service config should be received +// through name resolver, as specified here +// https://github.com/grpc/grpc/blob/master/doc/service_config.md +type MethodConfig struct { + // WaitForReady indicates whether RPCs sent to this method should wait until + // the connection is ready by default (!failfast). The value specified via the + // gRPC client API will override the value set here. + WaitForReady *bool + // Timeout is the default timeout for RPCs sent to this method. The actual + // deadline used will be the minimum of the value specified here and the value + // set by the application via the gRPC client API. If either one is not set, + // then the other will be used. If neither is set, then the RPC has no deadline. + Timeout *time.Duration + // MaxReqSize is the maximum allowed payload size for an individual request in a + // stream (client->server) in bytes. The size which is measured is the serialized + // payload after per-message compression (but before stream compression) in bytes. + // The actual value used is the minimum of the value specified here and the value set + // by the application via the gRPC client API. If either one is not set, then the other + // will be used. If neither is set, then the built-in default is used. + MaxReqSize *int + // MaxRespSize is the maximum allowed payload size for an individual response in a + // stream (server->client) in bytes. + MaxRespSize *int + // RetryPolicy configures retry options for the method. + retryPolicy *retryPolicy +} + +type lbConfig struct { + name string + cfg serviceconfig.LoadBalancingConfig +} + +// ServiceConfig is provided by the service provider and contains parameters for how +// clients that connect to the service should behave. +// +// Deprecated: Users should not use this struct. Service config should be received +// through name resolver, as specified here +// https://github.com/grpc/grpc/blob/master/doc/service_config.md +type ServiceConfig struct { + serviceconfig.Config + + // LB is the load balancer the service providers recommends. The balancer + // specified via grpc.WithBalancerName will override this. This is deprecated; + // lbConfigs is preferred. If lbConfig and LB are both present, lbConfig + // will be used. + LB *string + + // lbConfig is the service config's load balancing configuration. If + // lbConfig and LB are both present, lbConfig will be used. + lbConfig *lbConfig + + // Methods contains a map for the methods in this service. If there is an + // exact match for a method (i.e. /service/method) in the map, use the + // corresponding MethodConfig. If there's no exact match, look for the + // default config for the service (/service/) and use the corresponding + // MethodConfig if it exists. Otherwise, the method has no MethodConfig to + // use. + Methods map[string]MethodConfig + + // If a retryThrottlingPolicy is provided, gRPC will automatically throttle + // retry attempts and hedged RPCs when the client’s ratio of failures to + // successes exceeds a threshold. + // + // For each server name, the gRPC client will maintain a token_count which is + // initially set to maxTokens, and can take values between 0 and maxTokens. + // + // Every outgoing RPC (regardless of service or method invoked) will change + // token_count as follows: + // + // - Every failed RPC will decrement the token_count by 1. + // - Every successful RPC will increment the token_count by tokenRatio. + // + // If token_count is less than or equal to maxTokens / 2, then RPCs will not + // be retried and hedged RPCs will not be sent. + retryThrottling *retryThrottlingPolicy + // healthCheckConfig must be set as one of the requirement to enable LB channel + // health check. + healthCheckConfig *healthCheckConfig + // rawJSONString stores service config json string that get parsed into + // this service config struct. + rawJSONString string +} + +// healthCheckConfig defines the go-native version of the LB channel health check config. +type healthCheckConfig struct { + // serviceName is the service name to use in the health-checking request. + ServiceName string +} + +// retryPolicy defines the go-native version of the retry policy defined by the +// service config here: +// https://github.com/grpc/proposal/blob/master/A6-client-retries.md#integration-with-service-config +type retryPolicy struct { + // MaxAttempts is the maximum number of attempts, including the original RPC. + // + // This field is required and must be two or greater. + maxAttempts int + + // Exponential backoff parameters. The initial retry attempt will occur at + // random(0, initialBackoff). In general, the nth attempt will occur at + // random(0, + // min(initialBackoff*backoffMultiplier**(n-1), maxBackoff)). + // + // These fields are required and must be greater than zero. + initialBackoff time.Duration + maxBackoff time.Duration + backoffMultiplier float64 + + // The set of status codes which may be retried. + // + // Status codes are specified as strings, e.g., "UNAVAILABLE". + // + // This field is required and must be non-empty. + // Note: a set is used to store this for easy lookup. + retryableStatusCodes map[codes.Code]bool +} + +type jsonRetryPolicy struct { + MaxAttempts int + InitialBackoff string + MaxBackoff string + BackoffMultiplier float64 + RetryableStatusCodes []codes.Code +} + +// retryThrottlingPolicy defines the go-native version of the retry throttling +// policy defined by the service config here: +// https://github.com/grpc/proposal/blob/master/A6-client-retries.md#integration-with-service-config +type retryThrottlingPolicy struct { + // The number of tokens starts at maxTokens. The token_count will always be + // between 0 and maxTokens. + // + // This field is required and must be greater than zero. + MaxTokens float64 + // The amount of tokens to add on each successful RPC. Typically this will + // be some number between 0 and 1, e.g., 0.1. + // + // This field is required and must be greater than zero. Up to 3 decimal + // places are supported. + TokenRatio float64 +} + +func parseDuration(s *string) (*time.Duration, error) { + if s == nil { + return nil, nil + } + if !strings.HasSuffix(*s, "s") { + return nil, fmt.Errorf("malformed duration %q", *s) + } + ss := strings.SplitN((*s)[:len(*s)-1], ".", 3) + if len(ss) > 2 { + return nil, fmt.Errorf("malformed duration %q", *s) + } + // hasDigits is set if either the whole or fractional part of the number is + // present, since both are optional but one is required. + hasDigits := false + var d time.Duration + if len(ss[0]) > 0 { + i, err := strconv.ParseInt(ss[0], 10, 32) + if err != nil { + return nil, fmt.Errorf("malformed duration %q: %v", *s, err) + } + d = time.Duration(i) * time.Second + hasDigits = true + } + if len(ss) == 2 && len(ss[1]) > 0 { + if len(ss[1]) > 9 { + return nil, fmt.Errorf("malformed duration %q", *s) + } + f, err := strconv.ParseInt(ss[1], 10, 64) + if err != nil { + return nil, fmt.Errorf("malformed duration %q: %v", *s, err) + } + for i := 9; i > len(ss[1]); i-- { + f *= 10 + } + d += time.Duration(f) + hasDigits = true + } + if !hasDigits { + return nil, fmt.Errorf("malformed duration %q", *s) + } + + return &d, nil +} + +type jsonName struct { + Service string + Method string +} + +var ( + errDuplicatedName = errors.New("duplicated name") + errEmptyServiceNonEmptyMethod = errors.New("cannot combine empty 'service' and non-empty 'method'") +) + +func (j jsonName) generatePath() (string, error) { + if j.Service == "" { + if j.Method != "" { + return "", errEmptyServiceNonEmptyMethod + } + return "", nil + } + res := "/" + j.Service + "/" + if j.Method != "" { + res += j.Method + } + return res, nil +} + +// TODO(lyuxuan): delete this struct after cleaning up old service config implementation. +type jsonMC struct { + Name *[]jsonName + WaitForReady *bool + Timeout *string + MaxRequestMessageBytes *int64 + MaxResponseMessageBytes *int64 + RetryPolicy *jsonRetryPolicy +} + +// TODO(lyuxuan): delete this struct after cleaning up old service config implementation. +type jsonSC struct { + LoadBalancingPolicy *string + LoadBalancingConfig *internalserviceconfig.BalancerConfig + MethodConfig *[]jsonMC + RetryThrottling *retryThrottlingPolicy + HealthCheckConfig *healthCheckConfig +} + +func init() { + internal.ParseServiceConfigForTesting = parseServiceConfig +} +func parseServiceConfig(js string) *serviceconfig.ParseResult { + if len(js) == 0 { + return &serviceconfig.ParseResult{Err: fmt.Errorf("no JSON service config provided")} + } + var rsc jsonSC + err := json.Unmarshal([]byte(js), &rsc) + if err != nil { + logger.Warningf("grpc: parseServiceConfig error unmarshaling %s due to %v", js, err) + return &serviceconfig.ParseResult{Err: err} + } + sc := ServiceConfig{ + LB: rsc.LoadBalancingPolicy, + Methods: make(map[string]MethodConfig), + retryThrottling: rsc.RetryThrottling, + healthCheckConfig: rsc.HealthCheckConfig, + rawJSONString: js, + } + if c := rsc.LoadBalancingConfig; c != nil { + sc.lbConfig = &lbConfig{ + name: c.Name, + cfg: c.Config, + } + } + + if rsc.MethodConfig == nil { + return &serviceconfig.ParseResult{Config: &sc} + } + + paths := map[string]struct{}{} + for _, m := range *rsc.MethodConfig { + if m.Name == nil { + continue + } + d, err := parseDuration(m.Timeout) + if err != nil { + logger.Warningf("grpc: parseServiceConfig error unmarshaling %s due to %v", js, err) + return &serviceconfig.ParseResult{Err: err} + } + + mc := MethodConfig{ + WaitForReady: m.WaitForReady, + Timeout: d, + } + if mc.retryPolicy, err = convertRetryPolicy(m.RetryPolicy); err != nil { + logger.Warningf("grpc: parseServiceConfig error unmarshaling %s due to %v", js, err) + return &serviceconfig.ParseResult{Err: err} + } + if m.MaxRequestMessageBytes != nil { + if *m.MaxRequestMessageBytes > int64(maxInt) { + mc.MaxReqSize = newInt(maxInt) + } else { + mc.MaxReqSize = newInt(int(*m.MaxRequestMessageBytes)) + } + } + if m.MaxResponseMessageBytes != nil { + if *m.MaxResponseMessageBytes > int64(maxInt) { + mc.MaxRespSize = newInt(maxInt) + } else { + mc.MaxRespSize = newInt(int(*m.MaxResponseMessageBytes)) + } + } + for i, n := range *m.Name { + path, err := n.generatePath() + if err != nil { + logger.Warningf("grpc: parseServiceConfig error unmarshaling %s due to methodConfig[%d]: %v", js, i, err) + return &serviceconfig.ParseResult{Err: err} + } + + if _, ok := paths[path]; ok { + err = errDuplicatedName + logger.Warningf("grpc: parseServiceConfig error unmarshaling %s due to methodConfig[%d]: %v", js, i, err) + return &serviceconfig.ParseResult{Err: err} + } + paths[path] = struct{}{} + sc.Methods[path] = mc + } + } + + if sc.retryThrottling != nil { + if mt := sc.retryThrottling.MaxTokens; mt <= 0 || mt > 1000 { + return &serviceconfig.ParseResult{Err: fmt.Errorf("invalid retry throttling config: maxTokens (%v) out of range (0, 1000]", mt)} + } + if tr := sc.retryThrottling.TokenRatio; tr <= 0 { + return &serviceconfig.ParseResult{Err: fmt.Errorf("invalid retry throttling config: tokenRatio (%v) may not be negative", tr)} + } + } + return &serviceconfig.ParseResult{Config: &sc} +} + +func convertRetryPolicy(jrp *jsonRetryPolicy) (p *retryPolicy, err error) { + if jrp == nil { + return nil, nil + } + ib, err := parseDuration(&jrp.InitialBackoff) + if err != nil { + return nil, err + } + mb, err := parseDuration(&jrp.MaxBackoff) + if err != nil { + return nil, err + } + + if jrp.MaxAttempts <= 1 || + *ib <= 0 || + *mb <= 0 || + jrp.BackoffMultiplier <= 0 || + len(jrp.RetryableStatusCodes) == 0 { + logger.Warningf("grpc: ignoring retry policy %v due to illegal configuration", jrp) + return nil, nil + } + + rp := &retryPolicy{ + maxAttempts: jrp.MaxAttempts, + initialBackoff: *ib, + maxBackoff: *mb, + backoffMultiplier: jrp.BackoffMultiplier, + retryableStatusCodes: make(map[codes.Code]bool), + } + if rp.maxAttempts > 5 { + // TODO(retry): Make the max maxAttempts configurable. + rp.maxAttempts = 5 + } + for _, code := range jrp.RetryableStatusCodes { + rp.retryableStatusCodes[code] = true + } + return rp, nil +} + +func min(a, b *int) *int { + if *a < *b { + return a + } + return b +} + +func getMaxSize(mcMax, doptMax *int, defaultVal int) *int { + if mcMax == nil && doptMax == nil { + return &defaultVal + } + if mcMax != nil && doptMax != nil { + return min(mcMax, doptMax) + } + if mcMax != nil { + return mcMax + } + return doptMax +} + +func newInt(b int) *int { + return &b +} + +func init() { + internal.EqualServiceConfigForTesting = equalServiceConfig +} + +// equalServiceConfig compares two configs. The rawJSONString field is ignored, +// because they may diff in white spaces. +// +// If any of them is NOT *ServiceConfig, return false. +func equalServiceConfig(a, b serviceconfig.Config) bool { + aa, ok := a.(*ServiceConfig) + if !ok { + return false + } + bb, ok := b.(*ServiceConfig) + if !ok { + return false + } + aaRaw := aa.rawJSONString + aa.rawJSONString = "" + bbRaw := bb.rawJSONString + bb.rawJSONString = "" + defer func() { + aa.rawJSONString = aaRaw + bb.rawJSONString = bbRaw + }() + // Using reflect.DeepEqual instead of cmp.Equal because many balancer + // configs are unexported, and cmp.Equal cannot compare unexported fields + // from unexported structs. + return reflect.DeepEqual(aa, bb) +} diff --git a/vendor/google.golang.org/grpc/serviceconfig/serviceconfig.go b/vendor/google.golang.org/grpc/serviceconfig/serviceconfig.go new file mode 100644 index 000000000..73a2f9266 --- /dev/null +++ b/vendor/google.golang.org/grpc/serviceconfig/serviceconfig.go @@ -0,0 +1,44 @@ +/* + * + * Copyright 2019 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package serviceconfig defines types and methods for operating on gRPC +// service configs. +// +// Experimental +// +// Notice: This package is EXPERIMENTAL and may be changed or removed in a +// later release. +package serviceconfig + +// Config represents an opaque data structure holding a service config. +type Config interface { + isServiceConfig() +} + +// LoadBalancingConfig represents an opaque data structure holding a load +// balancing config. +type LoadBalancingConfig interface { + isLoadBalancingConfig() +} + +// ParseResult contains a service config or an error. Exactly one must be +// non-nil. +type ParseResult struct { + Config Config + Err error +} diff --git a/vendor/google.golang.org/grpc/stats/handlers.go b/vendor/google.golang.org/grpc/stats/handlers.go new file mode 100644 index 000000000..dc03731e4 --- /dev/null +++ b/vendor/google.golang.org/grpc/stats/handlers.go @@ -0,0 +1,63 @@ +/* + * + * Copyright 2016 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package stats + +import ( + "context" + "net" +) + +// ConnTagInfo defines the relevant information needed by connection context tagger. +type ConnTagInfo struct { + // RemoteAddr is the remote address of the corresponding connection. + RemoteAddr net.Addr + // LocalAddr is the local address of the corresponding connection. + LocalAddr net.Addr +} + +// RPCTagInfo defines the relevant information needed by RPC context tagger. +type RPCTagInfo struct { + // FullMethodName is the RPC method in the format of /package.service/method. + FullMethodName string + // FailFast indicates if this RPC is failfast. + // This field is only valid on client side, it's always false on server side. + FailFast bool +} + +// Handler defines the interface for the related stats handling (e.g., RPCs, connections). +type Handler interface { + // TagRPC can attach some information to the given context. + // The context used for the rest lifetime of the RPC will be derived from + // the returned context. + TagRPC(context.Context, *RPCTagInfo) context.Context + // HandleRPC processes the RPC stats. + HandleRPC(context.Context, RPCStats) + + // TagConn can attach some information to the given context. + // The returned context will be used for stats handling. + // For conn stats handling, the context used in HandleConn for this + // connection will be derived from the context returned. + // For RPC stats handling, + // - On server side, the context used in HandleRPC for all RPCs on this + // connection will be derived from the context returned. + // - On client side, the context is not derived from the context returned. + TagConn(context.Context, *ConnTagInfo) context.Context + // HandleConn processes the Conn stats. + HandleConn(context.Context, ConnStats) +} diff --git a/vendor/google.golang.org/grpc/stats/stats.go b/vendor/google.golang.org/grpc/stats/stats.go new file mode 100644 index 000000000..63e476ee7 --- /dev/null +++ b/vendor/google.golang.org/grpc/stats/stats.go @@ -0,0 +1,312 @@ +/* + * + * Copyright 2016 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package stats is for collecting and reporting various network and RPC stats. +// This package is for monitoring purpose only. All fields are read-only. +// All APIs are experimental. +package stats // import "google.golang.org/grpc/stats" + +import ( + "context" + "net" + "time" + + "google.golang.org/grpc/metadata" +) + +// RPCStats contains stats information about RPCs. +type RPCStats interface { + isRPCStats() + // IsClient returns true if this RPCStats is from client side. + IsClient() bool +} + +// Begin contains stats when an RPC begins. +// FailFast is only valid if this Begin is from client side. +type Begin struct { + // Client is true if this Begin is from client side. + Client bool + // BeginTime is the time when the RPC begins. + BeginTime time.Time + // FailFast indicates if this RPC is failfast. + FailFast bool +} + +// IsClient indicates if the stats information is from client side. +func (s *Begin) IsClient() bool { return s.Client } + +func (s *Begin) isRPCStats() {} + +// InPayload contains the information for an incoming payload. +type InPayload struct { + // Client is true if this InPayload is from client side. + Client bool + // Payload is the payload with original type. + Payload interface{} + // Data is the serialized message payload. + Data []byte + // Length is the length of uncompressed data. + Length int + // WireLength is the length of data on wire (compressed, signed, encrypted). + WireLength int + // RecvTime is the time when the payload is received. + RecvTime time.Time +} + +// IsClient indicates if the stats information is from client side. +func (s *InPayload) IsClient() bool { return s.Client } + +func (s *InPayload) isRPCStats() {} + +// InHeader contains stats when a header is received. +type InHeader struct { + // Client is true if this InHeader is from client side. + Client bool + // WireLength is the wire length of header. + WireLength int + // Compression is the compression algorithm used for the RPC. + Compression string + // Header contains the header metadata received. + Header metadata.MD + + // The following fields are valid only if Client is false. + // FullMethod is the full RPC method string, i.e., /package.service/method. + FullMethod string + // RemoteAddr is the remote address of the corresponding connection. + RemoteAddr net.Addr + // LocalAddr is the local address of the corresponding connection. + LocalAddr net.Addr +} + +// IsClient indicates if the stats information is from client side. +func (s *InHeader) IsClient() bool { return s.Client } + +func (s *InHeader) isRPCStats() {} + +// InTrailer contains stats when a trailer is received. +type InTrailer struct { + // Client is true if this InTrailer is from client side. + Client bool + // WireLength is the wire length of trailer. + WireLength int + // Trailer contains the trailer metadata received from the server. This + // field is only valid if this InTrailer is from the client side. + Trailer metadata.MD +} + +// IsClient indicates if the stats information is from client side. +func (s *InTrailer) IsClient() bool { return s.Client } + +func (s *InTrailer) isRPCStats() {} + +// OutPayload contains the information for an outgoing payload. +type OutPayload struct { + // Client is true if this OutPayload is from client side. + Client bool + // Payload is the payload with original type. + Payload interface{} + // Data is the serialized message payload. + Data []byte + // Length is the length of uncompressed data. + Length int + // WireLength is the length of data on wire (compressed, signed, encrypted). + WireLength int + // SentTime is the time when the payload is sent. + SentTime time.Time +} + +// IsClient indicates if this stats information is from client side. +func (s *OutPayload) IsClient() bool { return s.Client } + +func (s *OutPayload) isRPCStats() {} + +// OutHeader contains stats when a header is sent. +type OutHeader struct { + // Client is true if this OutHeader is from client side. + Client bool + // Compression is the compression algorithm used for the RPC. + Compression string + // Header contains the header metadata sent. + Header metadata.MD + + // The following fields are valid only if Client is true. + // FullMethod is the full RPC method string, i.e., /package.service/method. + FullMethod string + // RemoteAddr is the remote address of the corresponding connection. + RemoteAddr net.Addr + // LocalAddr is the local address of the corresponding connection. + LocalAddr net.Addr +} + +// IsClient indicates if this stats information is from client side. +func (s *OutHeader) IsClient() bool { return s.Client } + +func (s *OutHeader) isRPCStats() {} + +// OutTrailer contains stats when a trailer is sent. +type OutTrailer struct { + // Client is true if this OutTrailer is from client side. + Client bool + // WireLength is the wire length of trailer. + // + // Deprecated: This field is never set. The length is not known when this message is + // emitted because the trailer fields are compressed with hpack after that. + WireLength int + // Trailer contains the trailer metadata sent to the client. This + // field is only valid if this OutTrailer is from the server side. + Trailer metadata.MD +} + +// IsClient indicates if this stats information is from client side. +func (s *OutTrailer) IsClient() bool { return s.Client } + +func (s *OutTrailer) isRPCStats() {} + +// End contains stats when an RPC ends. +type End struct { + // Client is true if this End is from client side. + Client bool + // BeginTime is the time when the RPC began. + BeginTime time.Time + // EndTime is the time when the RPC ends. + EndTime time.Time + // Trailer contains the trailer metadata received from the server. This + // field is only valid if this End is from the client side. + // Deprecated: use Trailer in InTrailer instead. + Trailer metadata.MD + // Error is the error the RPC ended with. It is an error generated from + // status.Status and can be converted back to status.Status using + // status.FromError if non-nil. + Error error +} + +// IsClient indicates if this is from client side. +func (s *End) IsClient() bool { return s.Client } + +func (s *End) isRPCStats() {} + +// ConnStats contains stats information about connections. +type ConnStats interface { + isConnStats() + // IsClient returns true if this ConnStats is from client side. + IsClient() bool +} + +// ConnBegin contains the stats of a connection when it is established. +type ConnBegin struct { + // Client is true if this ConnBegin is from client side. + Client bool +} + +// IsClient indicates if this is from client side. +func (s *ConnBegin) IsClient() bool { return s.Client } + +func (s *ConnBegin) isConnStats() {} + +// ConnEnd contains the stats of a connection when it ends. +type ConnEnd struct { + // Client is true if this ConnEnd is from client side. + Client bool +} + +// IsClient indicates if this is from client side. +func (s *ConnEnd) IsClient() bool { return s.Client } + +func (s *ConnEnd) isConnStats() {} + +type incomingTagsKey struct{} +type outgoingTagsKey struct{} + +// SetTags attaches stats tagging data to the context, which will be sent in +// the outgoing RPC with the header grpc-tags-bin. Subsequent calls to +// SetTags will overwrite the values from earlier calls. +// +// NOTE: this is provided only for backward compatibility with existing clients +// and will likely be removed in an upcoming release. New uses should transmit +// this type of data using metadata with a different, non-reserved (i.e. does +// not begin with "grpc-") header name. +func SetTags(ctx context.Context, b []byte) context.Context { + return context.WithValue(ctx, outgoingTagsKey{}, b) +} + +// Tags returns the tags from the context for the inbound RPC. +// +// NOTE: this is provided only for backward compatibility with existing clients +// and will likely be removed in an upcoming release. New uses should transmit +// this type of data using metadata with a different, non-reserved (i.e. does +// not begin with "grpc-") header name. +func Tags(ctx context.Context) []byte { + b, _ := ctx.Value(incomingTagsKey{}).([]byte) + return b +} + +// SetIncomingTags attaches stats tagging data to the context, to be read by +// the application (not sent in outgoing RPCs). +// +// This is intended for gRPC-internal use ONLY. +func SetIncomingTags(ctx context.Context, b []byte) context.Context { + return context.WithValue(ctx, incomingTagsKey{}, b) +} + +// OutgoingTags returns the tags from the context for the outbound RPC. +// +// This is intended for gRPC-internal use ONLY. +func OutgoingTags(ctx context.Context) []byte { + b, _ := ctx.Value(outgoingTagsKey{}).([]byte) + return b +} + +type incomingTraceKey struct{} +type outgoingTraceKey struct{} + +// SetTrace attaches stats tagging data to the context, which will be sent in +// the outgoing RPC with the header grpc-trace-bin. Subsequent calls to +// SetTrace will overwrite the values from earlier calls. +// +// NOTE: this is provided only for backward compatibility with existing clients +// and will likely be removed in an upcoming release. New uses should transmit +// this type of data using metadata with a different, non-reserved (i.e. does +// not begin with "grpc-") header name. +func SetTrace(ctx context.Context, b []byte) context.Context { + return context.WithValue(ctx, outgoingTraceKey{}, b) +} + +// Trace returns the trace from the context for the inbound RPC. +// +// NOTE: this is provided only for backward compatibility with existing clients +// and will likely be removed in an upcoming release. New uses should transmit +// this type of data using metadata with a different, non-reserved (i.e. does +// not begin with "grpc-") header name. +func Trace(ctx context.Context) []byte { + b, _ := ctx.Value(incomingTraceKey{}).([]byte) + return b +} + +// SetIncomingTrace attaches stats tagging data to the context, to be read by +// the application (not sent in outgoing RPCs). It is intended for +// gRPC-internal use. +func SetIncomingTrace(ctx context.Context, b []byte) context.Context { + return context.WithValue(ctx, incomingTraceKey{}, b) +} + +// OutgoingTrace returns the trace from the context for the outbound RPC. It is +// intended for gRPC-internal use. +func OutgoingTrace(ctx context.Context) []byte { + b, _ := ctx.Value(outgoingTraceKey{}).([]byte) + return b +} diff --git a/vendor/google.golang.org/grpc/stream.go b/vendor/google.golang.org/grpc/stream.go new file mode 100644 index 000000000..5fd856a38 --- /dev/null +++ b/vendor/google.golang.org/grpc/stream.go @@ -0,0 +1,1551 @@ +/* + * + * Copyright 2014 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpc + +import ( + "context" + "errors" + "io" + "math" + "strconv" + "sync" + "time" + + "golang.org/x/net/trace" + "google.golang.org/grpc/balancer" + "google.golang.org/grpc/codes" + "google.golang.org/grpc/encoding" + "google.golang.org/grpc/internal/balancerload" + "google.golang.org/grpc/internal/binarylog" + "google.golang.org/grpc/internal/channelz" + "google.golang.org/grpc/internal/grpcrand" + "google.golang.org/grpc/internal/grpcutil" + "google.golang.org/grpc/internal/transport" + "google.golang.org/grpc/metadata" + "google.golang.org/grpc/peer" + "google.golang.org/grpc/stats" + "google.golang.org/grpc/status" +) + +// StreamHandler defines the handler called by gRPC server to complete the +// execution of a streaming RPC. If a StreamHandler returns an error, it +// should be produced by the status package, or else gRPC will use +// codes.Unknown as the status code and err.Error() as the status message +// of the RPC. +type StreamHandler func(srv interface{}, stream ServerStream) error + +// StreamDesc represents a streaming RPC service's method specification. +type StreamDesc struct { + StreamName string + Handler StreamHandler + + // At least one of these is true. + ServerStreams bool + ClientStreams bool +} + +// Stream defines the common interface a client or server stream has to satisfy. +// +// Deprecated: See ClientStream and ServerStream documentation instead. +type Stream interface { + // Deprecated: See ClientStream and ServerStream documentation instead. + Context() context.Context + // Deprecated: See ClientStream and ServerStream documentation instead. + SendMsg(m interface{}) error + // Deprecated: See ClientStream and ServerStream documentation instead. + RecvMsg(m interface{}) error +} + +// ClientStream defines the client-side behavior of a streaming RPC. +// +// All errors returned from ClientStream methods are compatible with the +// status package. +type ClientStream interface { + // Header returns the header metadata received from the server if there + // is any. It blocks if the metadata is not ready to read. + Header() (metadata.MD, error) + // Trailer returns the trailer metadata from the server, if there is any. + // It must only be called after stream.CloseAndRecv has returned, or + // stream.Recv has returned a non-nil error (including io.EOF). + Trailer() metadata.MD + // CloseSend closes the send direction of the stream. It closes the stream + // when non-nil error is met. It is also not safe to call CloseSend + // concurrently with SendMsg. + CloseSend() error + // Context returns the context for this stream. + // + // It should not be called until after Header or RecvMsg has returned. Once + // called, subsequent client-side retries are disabled. + Context() context.Context + // SendMsg is generally called by generated code. On error, SendMsg aborts + // the stream. If the error was generated by the client, the status is + // returned directly; otherwise, io.EOF is returned and the status of + // the stream may be discovered using RecvMsg. + // + // SendMsg blocks until: + // - There is sufficient flow control to schedule m with the transport, or + // - The stream is done, or + // - The stream breaks. + // + // SendMsg does not wait until the message is received by the server. An + // untimely stream closure may result in lost messages. To ensure delivery, + // users should ensure the RPC completed successfully using RecvMsg. + // + // It is safe to have a goroutine calling SendMsg and another goroutine + // calling RecvMsg on the same stream at the same time, but it is not safe + // to call SendMsg on the same stream in different goroutines. It is also + // not safe to call CloseSend concurrently with SendMsg. + SendMsg(m interface{}) error + // RecvMsg blocks until it receives a message into m or the stream is + // done. It returns io.EOF when the stream completes successfully. On + // any other error, the stream is aborted and the error contains the RPC + // status. + // + // It is safe to have a goroutine calling SendMsg and another goroutine + // calling RecvMsg on the same stream at the same time, but it is not + // safe to call RecvMsg on the same stream in different goroutines. + RecvMsg(m interface{}) error +} + +// NewStream creates a new Stream for the client side. This is typically +// called by generated code. ctx is used for the lifetime of the stream. +// +// To ensure resources are not leaked due to the stream returned, one of the following +// actions must be performed: +// +// 1. Call Close on the ClientConn. +// 2. Cancel the context provided. +// 3. Call RecvMsg until a non-nil error is returned. A protobuf-generated +// client-streaming RPC, for instance, might use the helper function +// CloseAndRecv (note that CloseSend does not Recv, therefore is not +// guaranteed to release all resources). +// 4. Receive a non-nil, non-io.EOF error from Header or SendMsg. +// +// If none of the above happen, a goroutine and a context will be leaked, and grpc +// will not call the optionally-configured stats handler with a stats.End message. +func (cc *ClientConn) NewStream(ctx context.Context, desc *StreamDesc, method string, opts ...CallOption) (ClientStream, error) { + // allow interceptor to see all applicable call options, which means those + // configured as defaults from dial option as well as per-call options + opts = combine(cc.dopts.callOptions, opts) + + if cc.dopts.streamInt != nil { + return cc.dopts.streamInt(ctx, desc, cc, method, newClientStream, opts...) + } + return newClientStream(ctx, desc, cc, method, opts...) +} + +// NewClientStream is a wrapper for ClientConn.NewStream. +func NewClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (ClientStream, error) { + return cc.NewStream(ctx, desc, method, opts...) +} + +func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (_ ClientStream, err error) { + if channelz.IsOn() { + cc.incrCallsStarted() + defer func() { + if err != nil { + cc.incrCallsFailed() + } + }() + } + c := defaultCallInfo() + // Provide an opportunity for the first RPC to see the first service config + // provided by the resolver. + if err := cc.waitForResolvedAddrs(ctx); err != nil { + return nil, err + } + mc := cc.GetMethodConfig(method) + if mc.WaitForReady != nil { + c.failFast = !*mc.WaitForReady + } + + // Possible context leak: + // The cancel function for the child context we create will only be called + // when RecvMsg returns a non-nil error, if the ClientConn is closed, or if + // an error is generated by SendMsg. + // https://github.com/grpc/grpc-go/issues/1818. + var cancel context.CancelFunc + if mc.Timeout != nil && *mc.Timeout >= 0 { + ctx, cancel = context.WithTimeout(ctx, *mc.Timeout) + } else { + ctx, cancel = context.WithCancel(ctx) + } + defer func() { + if err != nil { + cancel() + } + }() + + for _, o := range opts { + if err := o.before(c); err != nil { + return nil, toRPCErr(err) + } + } + c.maxSendMessageSize = getMaxSize(mc.MaxReqSize, c.maxSendMessageSize, defaultClientMaxSendMessageSize) + c.maxReceiveMessageSize = getMaxSize(mc.MaxRespSize, c.maxReceiveMessageSize, defaultClientMaxReceiveMessageSize) + if err := setCallInfoCodec(c); err != nil { + return nil, err + } + + callHdr := &transport.CallHdr{ + Host: cc.authority, + Method: method, + ContentSubtype: c.contentSubtype, + } + + // Set our outgoing compression according to the UseCompressor CallOption, if + // set. In that case, also find the compressor from the encoding package. + // Otherwise, use the compressor configured by the WithCompressor DialOption, + // if set. + var cp Compressor + var comp encoding.Compressor + if ct := c.compressorType; ct != "" { + callHdr.SendCompress = ct + if ct != encoding.Identity { + comp = encoding.GetCompressor(ct) + if comp == nil { + return nil, status.Errorf(codes.Internal, "grpc: Compressor is not installed for requested grpc-encoding %q", ct) + } + } + } else if cc.dopts.cp != nil { + callHdr.SendCompress = cc.dopts.cp.Type() + cp = cc.dopts.cp + } + if c.creds != nil { + callHdr.Creds = c.creds + } + var trInfo *traceInfo + if EnableTracing { + trInfo = &traceInfo{ + tr: trace.New("grpc.Sent."+methodFamily(method), method), + firstLine: firstLine{ + client: true, + }, + } + if deadline, ok := ctx.Deadline(); ok { + trInfo.firstLine.deadline = time.Until(deadline) + } + trInfo.tr.LazyLog(&trInfo.firstLine, false) + ctx = trace.NewContext(ctx, trInfo.tr) + } + ctx = newContextWithRPCInfo(ctx, c.failFast, c.codec, cp, comp) + sh := cc.dopts.copts.StatsHandler + var beginTime time.Time + if sh != nil { + ctx = sh.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method, FailFast: c.failFast}) + beginTime = time.Now() + begin := &stats.Begin{ + Client: true, + BeginTime: beginTime, + FailFast: c.failFast, + } + sh.HandleRPC(ctx, begin) + } + + cs := &clientStream{ + callHdr: callHdr, + ctx: ctx, + methodConfig: &mc, + opts: opts, + callInfo: c, + cc: cc, + desc: desc, + codec: c.codec, + cp: cp, + comp: comp, + cancel: cancel, + beginTime: beginTime, + firstAttempt: true, + } + if !cc.dopts.disableRetry { + cs.retryThrottler = cc.retryThrottler.Load().(*retryThrottler) + } + cs.binlog = binarylog.GetMethodLogger(method) + + // Only this initial attempt has stats/tracing. + // TODO(dfawley): move to newAttempt when per-attempt stats are implemented. + if err := cs.newAttemptLocked(sh, trInfo); err != nil { + cs.finish(err) + return nil, err + } + + op := func(a *csAttempt) error { return a.newStream() } + if err := cs.withRetry(op, func() { cs.bufferForRetryLocked(0, op) }); err != nil { + cs.finish(err) + return nil, err + } + + if cs.binlog != nil { + md, _ := metadata.FromOutgoingContext(ctx) + logEntry := &binarylog.ClientHeader{ + OnClientSide: true, + Header: md, + MethodName: method, + Authority: cs.cc.authority, + } + if deadline, ok := ctx.Deadline(); ok { + logEntry.Timeout = time.Until(deadline) + if logEntry.Timeout < 0 { + logEntry.Timeout = 0 + } + } + cs.binlog.Log(logEntry) + } + + if desc != unaryStreamDesc { + // Listen on cc and stream contexts to cleanup when the user closes the + // ClientConn or cancels the stream context. In all other cases, an error + // should already be injected into the recv buffer by the transport, which + // the client will eventually receive, and then we will cancel the stream's + // context in clientStream.finish. + go func() { + select { + case <-cc.ctx.Done(): + cs.finish(ErrClientConnClosing) + case <-ctx.Done(): + cs.finish(toRPCErr(ctx.Err())) + } + }() + } + return cs, nil +} + +// newAttemptLocked creates a new attempt with a transport. +// If it succeeds, then it replaces clientStream's attempt with this new attempt. +func (cs *clientStream) newAttemptLocked(sh stats.Handler, trInfo *traceInfo) (retErr error) { + newAttempt := &csAttempt{ + cs: cs, + dc: cs.cc.dopts.dc, + statsHandler: sh, + trInfo: trInfo, + } + defer func() { + if retErr != nil { + // This attempt is not set in the clientStream, so it's finish won't + // be called. Call it here for stats and trace in case they are not + // nil. + newAttempt.finish(retErr) + } + }() + + if err := cs.ctx.Err(); err != nil { + return toRPCErr(err) + } + + ctx := cs.ctx + if cs.cc.parsedTarget.Scheme == "xds" { + // Add extra metadata (metadata that will be added by transport) to context + // so the balancer can see them. + ctx = grpcutil.WithExtraMetadata(cs.ctx, metadata.Pairs( + "content-type", grpcutil.ContentType(cs.callHdr.ContentSubtype), + )) + } + t, done, err := cs.cc.getTransport(ctx, cs.callInfo.failFast, cs.callHdr.Method) + if err != nil { + return err + } + if trInfo != nil { + trInfo.firstLine.SetRemoteAddr(t.RemoteAddr()) + } + newAttempt.t = t + newAttempt.done = done + cs.attempt = newAttempt + return nil +} + +func (a *csAttempt) newStream() error { + cs := a.cs + cs.callHdr.PreviousAttempts = cs.numRetries + s, err := a.t.NewStream(cs.ctx, cs.callHdr) + if err != nil { + if _, ok := err.(transport.PerformedIOError); ok { + // Return without converting to an RPC error so retry code can + // inspect. + return err + } + return toRPCErr(err) + } + cs.attempt.s = s + cs.attempt.p = &parser{r: s} + return nil +} + +// clientStream implements a client side Stream. +type clientStream struct { + callHdr *transport.CallHdr + opts []CallOption + callInfo *callInfo + cc *ClientConn + desc *StreamDesc + + codec baseCodec + cp Compressor + comp encoding.Compressor + + cancel context.CancelFunc // cancels all attempts + + sentLast bool // sent an end stream + beginTime time.Time + + methodConfig *MethodConfig + + ctx context.Context // the application's context, wrapped by stats/tracing + + retryThrottler *retryThrottler // The throttler active when the RPC began. + + binlog *binarylog.MethodLogger // Binary logger, can be nil. + // serverHeaderBinlogged is a boolean for whether server header has been + // logged. Server header will be logged when the first time one of those + // happens: stream.Header(), stream.Recv(). + // + // It's only read and used by Recv() and Header(), so it doesn't need to be + // synchronized. + serverHeaderBinlogged bool + + mu sync.Mutex + firstAttempt bool // if true, transparent retry is valid + numRetries int // exclusive of transparent retry attempt(s) + numRetriesSincePushback int // retries since pushback; to reset backoff + finished bool // TODO: replace with atomic cmpxchg or sync.Once? + // attempt is the active client stream attempt. + // The only place where it is written is the newAttemptLocked method and this method never writes nil. + // So, attempt can be nil only inside newClientStream function when clientStream is first created. + // One of the first things done after clientStream's creation, is to call newAttemptLocked which either + // assigns a non nil value to the attempt or returns an error. If an error is returned from newAttemptLocked, + // then newClientStream calls finish on the clientStream and returns. So, finish method is the only + // place where we need to check if the attempt is nil. + attempt *csAttempt + // TODO(hedging): hedging will have multiple attempts simultaneously. + committed bool // active attempt committed for retry? + buffer []func(a *csAttempt) error // operations to replay on retry + bufferSize int // current size of buffer +} + +// csAttempt implements a single transport stream attempt within a +// clientStream. +type csAttempt struct { + cs *clientStream + t transport.ClientTransport + s *transport.Stream + p *parser + done func(balancer.DoneInfo) + + finished bool + dc Decompressor + decomp encoding.Compressor + decompSet bool + + mu sync.Mutex // guards trInfo.tr + // trInfo may be nil (if EnableTracing is false). + // trInfo.tr is set when created (if EnableTracing is true), + // and cleared when the finish method is called. + trInfo *traceInfo + + statsHandler stats.Handler +} + +func (cs *clientStream) commitAttemptLocked() { + cs.committed = true + cs.buffer = nil +} + +func (cs *clientStream) commitAttempt() { + cs.mu.Lock() + cs.commitAttemptLocked() + cs.mu.Unlock() +} + +// shouldRetry returns nil if the RPC should be retried; otherwise it returns +// the error that should be returned by the operation. +func (cs *clientStream) shouldRetry(err error) error { + unprocessed := false + if cs.attempt.s == nil { + pioErr, ok := err.(transport.PerformedIOError) + if ok { + // Unwrap error. + err = toRPCErr(pioErr.Err) + } else { + unprocessed = true + } + if !ok && !cs.callInfo.failFast { + // In the event of a non-IO operation error from NewStream, we + // never attempted to write anything to the wire, so we can retry + // indefinitely for non-fail-fast RPCs. + return nil + } + } + if cs.finished || cs.committed { + // RPC is finished or committed; cannot retry. + return err + } + // Wait for the trailers. + if cs.attempt.s != nil { + <-cs.attempt.s.Done() + unprocessed = cs.attempt.s.Unprocessed() + } + if cs.firstAttempt && unprocessed { + // First attempt, stream unprocessed: transparently retry. + return nil + } + if cs.cc.dopts.disableRetry { + return err + } + + pushback := 0 + hasPushback := false + if cs.attempt.s != nil { + if !cs.attempt.s.TrailersOnly() { + return err + } + + // TODO(retry): Move down if the spec changes to not check server pushback + // before considering this a failure for throttling. + sps := cs.attempt.s.Trailer()["grpc-retry-pushback-ms"] + if len(sps) == 1 { + var e error + if pushback, e = strconv.Atoi(sps[0]); e != nil || pushback < 0 { + channelz.Infof(logger, cs.cc.channelzID, "Server retry pushback specified to abort (%q).", sps[0]) + cs.retryThrottler.throttle() // This counts as a failure for throttling. + return err + } + hasPushback = true + } else if len(sps) > 1 { + channelz.Warningf(logger, cs.cc.channelzID, "Server retry pushback specified multiple values (%q); not retrying.", sps) + cs.retryThrottler.throttle() // This counts as a failure for throttling. + return err + } + } + + var code codes.Code + if cs.attempt.s != nil { + code = cs.attempt.s.Status().Code() + } else { + code = status.Convert(err).Code() + } + + rp := cs.methodConfig.retryPolicy + if rp == nil || !rp.retryableStatusCodes[code] { + return err + } + + // Note: the ordering here is important; we count this as a failure + // only if the code matched a retryable code. + if cs.retryThrottler.throttle() { + return err + } + if cs.numRetries+1 >= rp.maxAttempts { + return err + } + + var dur time.Duration + if hasPushback { + dur = time.Millisecond * time.Duration(pushback) + cs.numRetriesSincePushback = 0 + } else { + fact := math.Pow(rp.backoffMultiplier, float64(cs.numRetriesSincePushback)) + cur := float64(rp.initialBackoff) * fact + if max := float64(rp.maxBackoff); cur > max { + cur = max + } + dur = time.Duration(grpcrand.Int63n(int64(cur))) + cs.numRetriesSincePushback++ + } + + // TODO(dfawley): we could eagerly fail here if dur puts us past the + // deadline, but unsure if it is worth doing. + t := time.NewTimer(dur) + select { + case <-t.C: + cs.numRetries++ + return nil + case <-cs.ctx.Done(): + t.Stop() + return status.FromContextError(cs.ctx.Err()).Err() + } +} + +// Returns nil if a retry was performed and succeeded; error otherwise. +func (cs *clientStream) retryLocked(lastErr error) error { + for { + cs.attempt.finish(lastErr) + if err := cs.shouldRetry(lastErr); err != nil { + cs.commitAttemptLocked() + return err + } + cs.firstAttempt = false + if err := cs.newAttemptLocked(nil, nil); err != nil { + return err + } + if lastErr = cs.replayBufferLocked(); lastErr == nil { + return nil + } + } +} + +func (cs *clientStream) Context() context.Context { + cs.commitAttempt() + // No need to lock before using attempt, since we know it is committed and + // cannot change. + return cs.attempt.s.Context() +} + +func (cs *clientStream) withRetry(op func(a *csAttempt) error, onSuccess func()) error { + cs.mu.Lock() + for { + if cs.committed { + cs.mu.Unlock() + return op(cs.attempt) + } + a := cs.attempt + cs.mu.Unlock() + err := op(a) + cs.mu.Lock() + if a != cs.attempt { + // We started another attempt already. + continue + } + if err == io.EOF { + <-a.s.Done() + } + if err == nil || (err == io.EOF && a.s.Status().Code() == codes.OK) { + onSuccess() + cs.mu.Unlock() + return err + } + if err := cs.retryLocked(err); err != nil { + cs.mu.Unlock() + return err + } + } +} + +func (cs *clientStream) Header() (metadata.MD, error) { + var m metadata.MD + err := cs.withRetry(func(a *csAttempt) error { + var err error + m, err = a.s.Header() + return toRPCErr(err) + }, cs.commitAttemptLocked) + if err != nil { + cs.finish(err) + return nil, err + } + if cs.binlog != nil && !cs.serverHeaderBinlogged { + // Only log if binary log is on and header has not been logged. + logEntry := &binarylog.ServerHeader{ + OnClientSide: true, + Header: m, + PeerAddr: nil, + } + if peer, ok := peer.FromContext(cs.Context()); ok { + logEntry.PeerAddr = peer.Addr + } + cs.binlog.Log(logEntry) + cs.serverHeaderBinlogged = true + } + return m, err +} + +func (cs *clientStream) Trailer() metadata.MD { + // On RPC failure, we never need to retry, because usage requires that + // RecvMsg() returned a non-nil error before calling this function is valid. + // We would have retried earlier if necessary. + // + // Commit the attempt anyway, just in case users are not following those + // directions -- it will prevent races and should not meaningfully impact + // performance. + cs.commitAttempt() + if cs.attempt.s == nil { + return nil + } + return cs.attempt.s.Trailer() +} + +func (cs *clientStream) replayBufferLocked() error { + a := cs.attempt + for _, f := range cs.buffer { + if err := f(a); err != nil { + return err + } + } + return nil +} + +func (cs *clientStream) bufferForRetryLocked(sz int, op func(a *csAttempt) error) { + // Note: we still will buffer if retry is disabled (for transparent retries). + if cs.committed { + return + } + cs.bufferSize += sz + if cs.bufferSize > cs.callInfo.maxRetryRPCBufferSize { + cs.commitAttemptLocked() + return + } + cs.buffer = append(cs.buffer, op) +} + +func (cs *clientStream) SendMsg(m interface{}) (err error) { + defer func() { + if err != nil && err != io.EOF { + // Call finish on the client stream for errors generated by this SendMsg + // call, as these indicate problems created by this client. (Transport + // errors are converted to an io.EOF error in csAttempt.sendMsg; the real + // error will be returned from RecvMsg eventually in that case, or be + // retried.) + cs.finish(err) + } + }() + if cs.sentLast { + return status.Errorf(codes.Internal, "SendMsg called after CloseSend") + } + if !cs.desc.ClientStreams { + cs.sentLast = true + } + + // load hdr, payload, data + hdr, payload, data, err := prepareMsg(m, cs.codec, cs.cp, cs.comp) + if err != nil { + return err + } + + // TODO(dfawley): should we be checking len(data) instead? + if len(payload) > *cs.callInfo.maxSendMessageSize { + return status.Errorf(codes.ResourceExhausted, "trying to send message larger than max (%d vs. %d)", len(payload), *cs.callInfo.maxSendMessageSize) + } + msgBytes := data // Store the pointer before setting to nil. For binary logging. + op := func(a *csAttempt) error { + err := a.sendMsg(m, hdr, payload, data) + // nil out the message and uncomp when replaying; they are only needed for + // stats which is disabled for subsequent attempts. + m, data = nil, nil + return err + } + err = cs.withRetry(op, func() { cs.bufferForRetryLocked(len(hdr)+len(payload), op) }) + if cs.binlog != nil && err == nil { + cs.binlog.Log(&binarylog.ClientMessage{ + OnClientSide: true, + Message: msgBytes, + }) + } + return +} + +func (cs *clientStream) RecvMsg(m interface{}) error { + if cs.binlog != nil && !cs.serverHeaderBinlogged { + // Call Header() to binary log header if it's not already logged. + cs.Header() + } + var recvInfo *payloadInfo + if cs.binlog != nil { + recvInfo = &payloadInfo{} + } + err := cs.withRetry(func(a *csAttempt) error { + return a.recvMsg(m, recvInfo) + }, cs.commitAttemptLocked) + if cs.binlog != nil && err == nil { + cs.binlog.Log(&binarylog.ServerMessage{ + OnClientSide: true, + Message: recvInfo.uncompressedBytes, + }) + } + if err != nil || !cs.desc.ServerStreams { + // err != nil or non-server-streaming indicates end of stream. + cs.finish(err) + + if cs.binlog != nil { + // finish will not log Trailer. Log Trailer here. + logEntry := &binarylog.ServerTrailer{ + OnClientSide: true, + Trailer: cs.Trailer(), + Err: err, + } + if logEntry.Err == io.EOF { + logEntry.Err = nil + } + if peer, ok := peer.FromContext(cs.Context()); ok { + logEntry.PeerAddr = peer.Addr + } + cs.binlog.Log(logEntry) + } + } + return err +} + +func (cs *clientStream) CloseSend() error { + if cs.sentLast { + // TODO: return an error and finish the stream instead, due to API misuse? + return nil + } + cs.sentLast = true + op := func(a *csAttempt) error { + a.t.Write(a.s, nil, nil, &transport.Options{Last: true}) + // Always return nil; io.EOF is the only error that might make sense + // instead, but there is no need to signal the client to call RecvMsg + // as the only use left for the stream after CloseSend is to call + // RecvMsg. This also matches historical behavior. + return nil + } + cs.withRetry(op, func() { cs.bufferForRetryLocked(0, op) }) + if cs.binlog != nil { + cs.binlog.Log(&binarylog.ClientHalfClose{ + OnClientSide: true, + }) + } + // We never returned an error here for reasons. + return nil +} + +func (cs *clientStream) finish(err error) { + if err == io.EOF { + // Ending a stream with EOF indicates a success. + err = nil + } + cs.mu.Lock() + if cs.finished { + cs.mu.Unlock() + return + } + cs.finished = true + cs.commitAttemptLocked() + if cs.attempt != nil { + cs.attempt.finish(err) + // after functions all rely upon having a stream. + if cs.attempt.s != nil { + for _, o := range cs.opts { + o.after(cs.callInfo, cs.attempt) + } + } + } + cs.mu.Unlock() + // For binary logging. only log cancel in finish (could be caused by RPC ctx + // canceled or ClientConn closed). Trailer will be logged in RecvMsg. + // + // Only one of cancel or trailer needs to be logged. In the cases where + // users don't call RecvMsg, users must have already canceled the RPC. + if cs.binlog != nil && status.Code(err) == codes.Canceled { + cs.binlog.Log(&binarylog.Cancel{ + OnClientSide: true, + }) + } + if err == nil { + cs.retryThrottler.successfulRPC() + } + if channelz.IsOn() { + if err != nil { + cs.cc.incrCallsFailed() + } else { + cs.cc.incrCallsSucceeded() + } + } + cs.cancel() +} + +func (a *csAttempt) sendMsg(m interface{}, hdr, payld, data []byte) error { + cs := a.cs + if a.trInfo != nil { + a.mu.Lock() + if a.trInfo.tr != nil { + a.trInfo.tr.LazyLog(&payload{sent: true, msg: m}, true) + } + a.mu.Unlock() + } + if err := a.t.Write(a.s, hdr, payld, &transport.Options{Last: !cs.desc.ClientStreams}); err != nil { + if !cs.desc.ClientStreams { + // For non-client-streaming RPCs, we return nil instead of EOF on error + // because the generated code requires it. finish is not called; RecvMsg() + // will call it with the stream's status independently. + return nil + } + return io.EOF + } + if a.statsHandler != nil { + a.statsHandler.HandleRPC(cs.ctx, outPayload(true, m, data, payld, time.Now())) + } + if channelz.IsOn() { + a.t.IncrMsgSent() + } + return nil +} + +func (a *csAttempt) recvMsg(m interface{}, payInfo *payloadInfo) (err error) { + cs := a.cs + if a.statsHandler != nil && payInfo == nil { + payInfo = &payloadInfo{} + } + + if !a.decompSet { + // Block until we receive headers containing received message encoding. + if ct := a.s.RecvCompress(); ct != "" && ct != encoding.Identity { + if a.dc == nil || a.dc.Type() != ct { + // No configured decompressor, or it does not match the incoming + // message encoding; attempt to find a registered compressor that does. + a.dc = nil + a.decomp = encoding.GetCompressor(ct) + } + } else { + // No compression is used; disable our decompressor. + a.dc = nil + } + // Only initialize this state once per stream. + a.decompSet = true + } + err = recv(a.p, cs.codec, a.s, a.dc, m, *cs.callInfo.maxReceiveMessageSize, payInfo, a.decomp) + if err != nil { + if err == io.EOF { + if statusErr := a.s.Status().Err(); statusErr != nil { + return statusErr + } + return io.EOF // indicates successful end of stream. + } + return toRPCErr(err) + } + if a.trInfo != nil { + a.mu.Lock() + if a.trInfo.tr != nil { + a.trInfo.tr.LazyLog(&payload{sent: false, msg: m}, true) + } + a.mu.Unlock() + } + if a.statsHandler != nil { + a.statsHandler.HandleRPC(cs.ctx, &stats.InPayload{ + Client: true, + RecvTime: time.Now(), + Payload: m, + // TODO truncate large payload. + Data: payInfo.uncompressedBytes, + WireLength: payInfo.wireLength + headerLen, + Length: len(payInfo.uncompressedBytes), + }) + } + if channelz.IsOn() { + a.t.IncrMsgRecv() + } + if cs.desc.ServerStreams { + // Subsequent messages should be received by subsequent RecvMsg calls. + return nil + } + // Special handling for non-server-stream rpcs. + // This recv expects EOF or errors, so we don't collect inPayload. + err = recv(a.p, cs.codec, a.s, a.dc, m, *cs.callInfo.maxReceiveMessageSize, nil, a.decomp) + if err == nil { + return toRPCErr(errors.New("grpc: client streaming protocol violation: get , want ")) + } + if err == io.EOF { + return a.s.Status().Err() // non-server streaming Recv returns nil on success + } + return toRPCErr(err) +} + +func (a *csAttempt) finish(err error) { + a.mu.Lock() + if a.finished { + a.mu.Unlock() + return + } + a.finished = true + if err == io.EOF { + // Ending a stream with EOF indicates a success. + err = nil + } + var tr metadata.MD + if a.s != nil { + a.t.CloseStream(a.s, err) + tr = a.s.Trailer() + } + + if a.done != nil { + br := false + if a.s != nil { + br = a.s.BytesReceived() + } + a.done(balancer.DoneInfo{ + Err: err, + Trailer: tr, + BytesSent: a.s != nil, + BytesReceived: br, + ServerLoad: balancerload.Parse(tr), + }) + } + if a.statsHandler != nil { + end := &stats.End{ + Client: true, + BeginTime: a.cs.beginTime, + EndTime: time.Now(), + Trailer: tr, + Error: err, + } + a.statsHandler.HandleRPC(a.cs.ctx, end) + } + if a.trInfo != nil && a.trInfo.tr != nil { + if err == nil { + a.trInfo.tr.LazyPrintf("RPC: [OK]") + } else { + a.trInfo.tr.LazyPrintf("RPC: [%v]", err) + a.trInfo.tr.SetError() + } + a.trInfo.tr.Finish() + a.trInfo.tr = nil + } + a.mu.Unlock() +} + +// newClientStream creates a ClientStream with the specified transport, on the +// given addrConn. +// +// It's expected that the given transport is either the same one in addrConn, or +// is already closed. To avoid race, transport is specified separately, instead +// of using ac.transpot. +// +// Main difference between this and ClientConn.NewStream: +// - no retry +// - no service config (or wait for service config) +// - no tracing or stats +func newNonRetryClientStream(ctx context.Context, desc *StreamDesc, method string, t transport.ClientTransport, ac *addrConn, opts ...CallOption) (_ ClientStream, err error) { + if t == nil { + // TODO: return RPC error here? + return nil, errors.New("transport provided is nil") + } + // defaultCallInfo contains unnecessary info(i.e. failfast, maxRetryRPCBufferSize), so we just initialize an empty struct. + c := &callInfo{} + + // Possible context leak: + // The cancel function for the child context we create will only be called + // when RecvMsg returns a non-nil error, if the ClientConn is closed, or if + // an error is generated by SendMsg. + // https://github.com/grpc/grpc-go/issues/1818. + ctx, cancel := context.WithCancel(ctx) + defer func() { + if err != nil { + cancel() + } + }() + + for _, o := range opts { + if err := o.before(c); err != nil { + return nil, toRPCErr(err) + } + } + c.maxReceiveMessageSize = getMaxSize(nil, c.maxReceiveMessageSize, defaultClientMaxReceiveMessageSize) + c.maxSendMessageSize = getMaxSize(nil, c.maxSendMessageSize, defaultServerMaxSendMessageSize) + if err := setCallInfoCodec(c); err != nil { + return nil, err + } + + callHdr := &transport.CallHdr{ + Host: ac.cc.authority, + Method: method, + ContentSubtype: c.contentSubtype, + } + + // Set our outgoing compression according to the UseCompressor CallOption, if + // set. In that case, also find the compressor from the encoding package. + // Otherwise, use the compressor configured by the WithCompressor DialOption, + // if set. + var cp Compressor + var comp encoding.Compressor + if ct := c.compressorType; ct != "" { + callHdr.SendCompress = ct + if ct != encoding.Identity { + comp = encoding.GetCompressor(ct) + if comp == nil { + return nil, status.Errorf(codes.Internal, "grpc: Compressor is not installed for requested grpc-encoding %q", ct) + } + } + } else if ac.cc.dopts.cp != nil { + callHdr.SendCompress = ac.cc.dopts.cp.Type() + cp = ac.cc.dopts.cp + } + if c.creds != nil { + callHdr.Creds = c.creds + } + + // Use a special addrConnStream to avoid retry. + as := &addrConnStream{ + callHdr: callHdr, + ac: ac, + ctx: ctx, + cancel: cancel, + opts: opts, + callInfo: c, + desc: desc, + codec: c.codec, + cp: cp, + comp: comp, + t: t, + } + + s, err := as.t.NewStream(as.ctx, as.callHdr) + if err != nil { + err = toRPCErr(err) + return nil, err + } + as.s = s + as.p = &parser{r: s} + ac.incrCallsStarted() + if desc != unaryStreamDesc { + // Listen on cc and stream contexts to cleanup when the user closes the + // ClientConn or cancels the stream context. In all other cases, an error + // should already be injected into the recv buffer by the transport, which + // the client will eventually receive, and then we will cancel the stream's + // context in clientStream.finish. + go func() { + select { + case <-ac.ctx.Done(): + as.finish(status.Error(codes.Canceled, "grpc: the SubConn is closing")) + case <-ctx.Done(): + as.finish(toRPCErr(ctx.Err())) + } + }() + } + return as, nil +} + +type addrConnStream struct { + s *transport.Stream + ac *addrConn + callHdr *transport.CallHdr + cancel context.CancelFunc + opts []CallOption + callInfo *callInfo + t transport.ClientTransport + ctx context.Context + sentLast bool + desc *StreamDesc + codec baseCodec + cp Compressor + comp encoding.Compressor + decompSet bool + dc Decompressor + decomp encoding.Compressor + p *parser + mu sync.Mutex + finished bool +} + +func (as *addrConnStream) Header() (metadata.MD, error) { + m, err := as.s.Header() + if err != nil { + as.finish(toRPCErr(err)) + } + return m, err +} + +func (as *addrConnStream) Trailer() metadata.MD { + return as.s.Trailer() +} + +func (as *addrConnStream) CloseSend() error { + if as.sentLast { + // TODO: return an error and finish the stream instead, due to API misuse? + return nil + } + as.sentLast = true + + as.t.Write(as.s, nil, nil, &transport.Options{Last: true}) + // Always return nil; io.EOF is the only error that might make sense + // instead, but there is no need to signal the client to call RecvMsg + // as the only use left for the stream after CloseSend is to call + // RecvMsg. This also matches historical behavior. + return nil +} + +func (as *addrConnStream) Context() context.Context { + return as.s.Context() +} + +func (as *addrConnStream) SendMsg(m interface{}) (err error) { + defer func() { + if err != nil && err != io.EOF { + // Call finish on the client stream for errors generated by this SendMsg + // call, as these indicate problems created by this client. (Transport + // errors are converted to an io.EOF error in csAttempt.sendMsg; the real + // error will be returned from RecvMsg eventually in that case, or be + // retried.) + as.finish(err) + } + }() + if as.sentLast { + return status.Errorf(codes.Internal, "SendMsg called after CloseSend") + } + if !as.desc.ClientStreams { + as.sentLast = true + } + + // load hdr, payload, data + hdr, payld, _, err := prepareMsg(m, as.codec, as.cp, as.comp) + if err != nil { + return err + } + + // TODO(dfawley): should we be checking len(data) instead? + if len(payld) > *as.callInfo.maxSendMessageSize { + return status.Errorf(codes.ResourceExhausted, "trying to send message larger than max (%d vs. %d)", len(payld), *as.callInfo.maxSendMessageSize) + } + + if err := as.t.Write(as.s, hdr, payld, &transport.Options{Last: !as.desc.ClientStreams}); err != nil { + if !as.desc.ClientStreams { + // For non-client-streaming RPCs, we return nil instead of EOF on error + // because the generated code requires it. finish is not called; RecvMsg() + // will call it with the stream's status independently. + return nil + } + return io.EOF + } + + if channelz.IsOn() { + as.t.IncrMsgSent() + } + return nil +} + +func (as *addrConnStream) RecvMsg(m interface{}) (err error) { + defer func() { + if err != nil || !as.desc.ServerStreams { + // err != nil or non-server-streaming indicates end of stream. + as.finish(err) + } + }() + + if !as.decompSet { + // Block until we receive headers containing received message encoding. + if ct := as.s.RecvCompress(); ct != "" && ct != encoding.Identity { + if as.dc == nil || as.dc.Type() != ct { + // No configured decompressor, or it does not match the incoming + // message encoding; attempt to find a registered compressor that does. + as.dc = nil + as.decomp = encoding.GetCompressor(ct) + } + } else { + // No compression is used; disable our decompressor. + as.dc = nil + } + // Only initialize this state once per stream. + as.decompSet = true + } + err = recv(as.p, as.codec, as.s, as.dc, m, *as.callInfo.maxReceiveMessageSize, nil, as.decomp) + if err != nil { + if err == io.EOF { + if statusErr := as.s.Status().Err(); statusErr != nil { + return statusErr + } + return io.EOF // indicates successful end of stream. + } + return toRPCErr(err) + } + + if channelz.IsOn() { + as.t.IncrMsgRecv() + } + if as.desc.ServerStreams { + // Subsequent messages should be received by subsequent RecvMsg calls. + return nil + } + + // Special handling for non-server-stream rpcs. + // This recv expects EOF or errors, so we don't collect inPayload. + err = recv(as.p, as.codec, as.s, as.dc, m, *as.callInfo.maxReceiveMessageSize, nil, as.decomp) + if err == nil { + return toRPCErr(errors.New("grpc: client streaming protocol violation: get , want ")) + } + if err == io.EOF { + return as.s.Status().Err() // non-server streaming Recv returns nil on success + } + return toRPCErr(err) +} + +func (as *addrConnStream) finish(err error) { + as.mu.Lock() + if as.finished { + as.mu.Unlock() + return + } + as.finished = true + if err == io.EOF { + // Ending a stream with EOF indicates a success. + err = nil + } + if as.s != nil { + as.t.CloseStream(as.s, err) + } + + if err != nil { + as.ac.incrCallsFailed() + } else { + as.ac.incrCallsSucceeded() + } + as.cancel() + as.mu.Unlock() +} + +// ServerStream defines the server-side behavior of a streaming RPC. +// +// All errors returned from ServerStream methods are compatible with the +// status package. +type ServerStream interface { + // SetHeader sets the header metadata. It may be called multiple times. + // When call multiple times, all the provided metadata will be merged. + // All the metadata will be sent out when one of the following happens: + // - ServerStream.SendHeader() is called; + // - The first response is sent out; + // - An RPC status is sent out (error or success). + SetHeader(metadata.MD) error + // SendHeader sends the header metadata. + // The provided md and headers set by SetHeader() will be sent. + // It fails if called multiple times. + SendHeader(metadata.MD) error + // SetTrailer sets the trailer metadata which will be sent with the RPC status. + // When called more than once, all the provided metadata will be merged. + SetTrailer(metadata.MD) + // Context returns the context for this stream. + Context() context.Context + // SendMsg sends a message. On error, SendMsg aborts the stream and the + // error is returned directly. + // + // SendMsg blocks until: + // - There is sufficient flow control to schedule m with the transport, or + // - The stream is done, or + // - The stream breaks. + // + // SendMsg does not wait until the message is received by the client. An + // untimely stream closure may result in lost messages. + // + // It is safe to have a goroutine calling SendMsg and another goroutine + // calling RecvMsg on the same stream at the same time, but it is not safe + // to call SendMsg on the same stream in different goroutines. + SendMsg(m interface{}) error + // RecvMsg blocks until it receives a message into m or the stream is + // done. It returns io.EOF when the client has performed a CloseSend. On + // any non-EOF error, the stream is aborted and the error contains the + // RPC status. + // + // It is safe to have a goroutine calling SendMsg and another goroutine + // calling RecvMsg on the same stream at the same time, but it is not + // safe to call RecvMsg on the same stream in different goroutines. + RecvMsg(m interface{}) error +} + +// serverStream implements a server side Stream. +type serverStream struct { + ctx context.Context + t transport.ServerTransport + s *transport.Stream + p *parser + codec baseCodec + + cp Compressor + dc Decompressor + comp encoding.Compressor + decomp encoding.Compressor + + maxReceiveMessageSize int + maxSendMessageSize int + trInfo *traceInfo + + statsHandler stats.Handler + + binlog *binarylog.MethodLogger + // serverHeaderBinlogged indicates whether server header has been logged. It + // will happen when one of the following two happens: stream.SendHeader(), + // stream.Send(). + // + // It's only checked in send and sendHeader, doesn't need to be + // synchronized. + serverHeaderBinlogged bool + + mu sync.Mutex // protects trInfo.tr after the service handler runs. +} + +func (ss *serverStream) Context() context.Context { + return ss.ctx +} + +func (ss *serverStream) SetHeader(md metadata.MD) error { + if md.Len() == 0 { + return nil + } + return ss.s.SetHeader(md) +} + +func (ss *serverStream) SendHeader(md metadata.MD) error { + err := ss.t.WriteHeader(ss.s, md) + if ss.binlog != nil && !ss.serverHeaderBinlogged { + h, _ := ss.s.Header() + ss.binlog.Log(&binarylog.ServerHeader{ + Header: h, + }) + ss.serverHeaderBinlogged = true + } + return err +} + +func (ss *serverStream) SetTrailer(md metadata.MD) { + if md.Len() == 0 { + return + } + ss.s.SetTrailer(md) +} + +func (ss *serverStream) SendMsg(m interface{}) (err error) { + defer func() { + if ss.trInfo != nil { + ss.mu.Lock() + if ss.trInfo.tr != nil { + if err == nil { + ss.trInfo.tr.LazyLog(&payload{sent: true, msg: m}, true) + } else { + ss.trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true) + ss.trInfo.tr.SetError() + } + } + ss.mu.Unlock() + } + if err != nil && err != io.EOF { + st, _ := status.FromError(toRPCErr(err)) + ss.t.WriteStatus(ss.s, st) + // Non-user specified status was sent out. This should be an error + // case (as a server side Cancel maybe). + // + // This is not handled specifically now. User will return a final + // status from the service handler, we will log that error instead. + // This behavior is similar to an interceptor. + } + if channelz.IsOn() && err == nil { + ss.t.IncrMsgSent() + } + }() + + // load hdr, payload, data + hdr, payload, data, err := prepareMsg(m, ss.codec, ss.cp, ss.comp) + if err != nil { + return err + } + + // TODO(dfawley): should we be checking len(data) instead? + if len(payload) > ss.maxSendMessageSize { + return status.Errorf(codes.ResourceExhausted, "trying to send message larger than max (%d vs. %d)", len(payload), ss.maxSendMessageSize) + } + if err := ss.t.Write(ss.s, hdr, payload, &transport.Options{Last: false}); err != nil { + return toRPCErr(err) + } + if ss.binlog != nil { + if !ss.serverHeaderBinlogged { + h, _ := ss.s.Header() + ss.binlog.Log(&binarylog.ServerHeader{ + Header: h, + }) + ss.serverHeaderBinlogged = true + } + ss.binlog.Log(&binarylog.ServerMessage{ + Message: data, + }) + } + if ss.statsHandler != nil { + ss.statsHandler.HandleRPC(ss.s.Context(), outPayload(false, m, data, payload, time.Now())) + } + return nil +} + +func (ss *serverStream) RecvMsg(m interface{}) (err error) { + defer func() { + if ss.trInfo != nil { + ss.mu.Lock() + if ss.trInfo.tr != nil { + if err == nil { + ss.trInfo.tr.LazyLog(&payload{sent: false, msg: m}, true) + } else if err != io.EOF { + ss.trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true) + ss.trInfo.tr.SetError() + } + } + ss.mu.Unlock() + } + if err != nil && err != io.EOF { + st, _ := status.FromError(toRPCErr(err)) + ss.t.WriteStatus(ss.s, st) + // Non-user specified status was sent out. This should be an error + // case (as a server side Cancel maybe). + // + // This is not handled specifically now. User will return a final + // status from the service handler, we will log that error instead. + // This behavior is similar to an interceptor. + } + if channelz.IsOn() && err == nil { + ss.t.IncrMsgRecv() + } + }() + var payInfo *payloadInfo + if ss.statsHandler != nil || ss.binlog != nil { + payInfo = &payloadInfo{} + } + if err := recv(ss.p, ss.codec, ss.s, ss.dc, m, ss.maxReceiveMessageSize, payInfo, ss.decomp); err != nil { + if err == io.EOF { + if ss.binlog != nil { + ss.binlog.Log(&binarylog.ClientHalfClose{}) + } + return err + } + if err == io.ErrUnexpectedEOF { + err = status.Errorf(codes.Internal, io.ErrUnexpectedEOF.Error()) + } + return toRPCErr(err) + } + if ss.statsHandler != nil { + ss.statsHandler.HandleRPC(ss.s.Context(), &stats.InPayload{ + RecvTime: time.Now(), + Payload: m, + // TODO truncate large payload. + Data: payInfo.uncompressedBytes, + WireLength: payInfo.wireLength + headerLen, + Length: len(payInfo.uncompressedBytes), + }) + } + if ss.binlog != nil { + ss.binlog.Log(&binarylog.ClientMessage{ + Message: payInfo.uncompressedBytes, + }) + } + return nil +} + +// MethodFromServerStream returns the method string for the input stream. +// The returned string is in the format of "/service/method". +func MethodFromServerStream(stream ServerStream) (string, bool) { + return Method(stream.Context()) +} + +// prepareMsg returns the hdr, payload and data +// using the compressors passed or using the +// passed preparedmsg +func prepareMsg(m interface{}, codec baseCodec, cp Compressor, comp encoding.Compressor) (hdr, payload, data []byte, err error) { + if preparedMsg, ok := m.(*PreparedMsg); ok { + return preparedMsg.hdr, preparedMsg.payload, preparedMsg.encodedData, nil + } + // The input interface is not a prepared msg. + // Marshal and Compress the data at this point + data, err = encode(codec, m) + if err != nil { + return nil, nil, nil, err + } + compData, err := compress(data, cp, comp) + if err != nil { + return nil, nil, nil, err + } + hdr, payload = msgHeader(data, compData) + return hdr, payload, data, nil +} diff --git a/vendor/google.golang.org/grpc/tap/tap.go b/vendor/google.golang.org/grpc/tap/tap.go new file mode 100644 index 000000000..caea1ebed --- /dev/null +++ b/vendor/google.golang.org/grpc/tap/tap.go @@ -0,0 +1,56 @@ +/* + * + * Copyright 2016 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +// Package tap defines the function handles which are executed on the transport +// layer of gRPC-Go and related information. +// +// Experimental +// +// Notice: This API is EXPERIMENTAL and may be changed or removed in a +// later release. +package tap + +import ( + "context" +) + +// Info defines the relevant information needed by the handles. +type Info struct { + // FullMethodName is the string of grpc method (in the format of + // /package.service/method). + FullMethodName string + // TODO: More to be added. +} + +// ServerInHandle defines the function which runs before a new stream is created +// on the server side. If it returns a non-nil error, the stream will not be +// created and a RST_STREAM will be sent back to the client with REFUSED_STREAM. +// The client will receive an RPC error "code = Unavailable, desc = stream +// terminated by RST_STREAM with error code: REFUSED_STREAM". +// +// It's intended to be used in situations where you don't want to waste the +// resources to accept the new stream (e.g. rate-limiting). And the content of +// the error will be ignored and won't be sent back to the client. For other +// general usages, please use interceptors. +// +// Note that it is executed in the per-connection I/O goroutine(s) instead of +// per-RPC goroutine. Therefore, users should NOT have any +// blocking/time-consuming work in this handle. Otherwise all the RPCs would +// slow down. Also, for the same reason, this handle won't be called +// concurrently by gRPC. +type ServerInHandle func(ctx context.Context, info *Info) (context.Context, error) diff --git a/vendor/google.golang.org/grpc/trace.go b/vendor/google.golang.org/grpc/trace.go new file mode 100644 index 000000000..07a2d26b3 --- /dev/null +++ b/vendor/google.golang.org/grpc/trace.go @@ -0,0 +1,123 @@ +/* + * + * Copyright 2015 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpc + +import ( + "bytes" + "fmt" + "io" + "net" + "strings" + "sync" + "time" + + "golang.org/x/net/trace" +) + +// EnableTracing controls whether to trace RPCs using the golang.org/x/net/trace package. +// This should only be set before any RPCs are sent or received by this program. +var EnableTracing bool + +// methodFamily returns the trace family for the given method. +// It turns "/pkg.Service/GetFoo" into "pkg.Service". +func methodFamily(m string) string { + m = strings.TrimPrefix(m, "/") // remove leading slash + if i := strings.Index(m, "/"); i >= 0 { + m = m[:i] // remove everything from second slash + } + return m +} + +// traceInfo contains tracing information for an RPC. +type traceInfo struct { + tr trace.Trace + firstLine firstLine +} + +// firstLine is the first line of an RPC trace. +// It may be mutated after construction; remoteAddr specifically may change +// during client-side use. +type firstLine struct { + mu sync.Mutex + client bool // whether this is a client (outgoing) RPC + remoteAddr net.Addr + deadline time.Duration // may be zero +} + +func (f *firstLine) SetRemoteAddr(addr net.Addr) { + f.mu.Lock() + f.remoteAddr = addr + f.mu.Unlock() +} + +func (f *firstLine) String() string { + f.mu.Lock() + defer f.mu.Unlock() + + var line bytes.Buffer + io.WriteString(&line, "RPC: ") + if f.client { + io.WriteString(&line, "to") + } else { + io.WriteString(&line, "from") + } + fmt.Fprintf(&line, " %v deadline:", f.remoteAddr) + if f.deadline != 0 { + fmt.Fprint(&line, f.deadline) + } else { + io.WriteString(&line, "none") + } + return line.String() +} + +const truncateSize = 100 + +func truncate(x string, l int) string { + if l > len(x) { + return x + } + return x[:l] +} + +// payload represents an RPC request or response payload. +type payload struct { + sent bool // whether this is an outgoing payload + msg interface{} // e.g. a proto.Message + // TODO(dsymonds): add stringifying info to codec, and limit how much we hold here? +} + +func (p payload) String() string { + if p.sent { + return truncate(fmt.Sprintf("sent: %v", p.msg), truncateSize) + } + return truncate(fmt.Sprintf("recv: %v", p.msg), truncateSize) +} + +type fmtStringer struct { + format string + a []interface{} +} + +func (f *fmtStringer) String() string { + return fmt.Sprintf(f.format, f.a...) +} + +type stringer string + +func (s stringer) String() string { return string(s) } diff --git a/vendor/google.golang.org/grpc/version.go b/vendor/google.golang.org/grpc/version.go new file mode 100644 index 000000000..144b0bf9e --- /dev/null +++ b/vendor/google.golang.org/grpc/version.go @@ -0,0 +1,22 @@ +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpc + +// Version is the current grpc version. +const Version = "1.33.2" diff --git a/vendor/google.golang.org/grpc/vet.sh b/vendor/google.golang.org/grpc/vet.sh new file mode 100644 index 000000000..48652f604 --- /dev/null +++ b/vendor/google.golang.org/grpc/vet.sh @@ -0,0 +1,220 @@ +#!/bin/bash + +set -ex # Exit on error; debugging enabled. +set -o pipefail # Fail a pipe if any sub-command fails. + +# not makes sure the command passed to it does not exit with a return code of 0. +not() { + # This is required instead of the earlier (! $COMMAND) because subshells and + # pipefail don't work the same on Darwin as in Linux. + ! "$@" +} + +die() { + echo "$@" >&2 + exit 1 +} + +fail_on_output() { + tee /dev/stderr | not read +} + +# Check to make sure it's safe to modify the user's git repo. +git status --porcelain | fail_on_output + +# Undo any edits made by this script. +cleanup() { + git reset --hard HEAD +} +trap cleanup EXIT + +PATH="${GOPATH}/bin:${GOROOT}/bin:${PATH}" + +if [[ "$1" = "-install" ]]; then + # Check for module support + if go help mod >& /dev/null; then + # Install the pinned versions as defined in module tools. + pushd ./test/tools + go install \ + golang.org/x/lint/golint \ + golang.org/x/tools/cmd/goimports \ + honnef.co/go/tools/cmd/staticcheck \ + github.com/client9/misspell/cmd/misspell + popd + else + # Ye olde `go get` incantation. + # Note: this gets the latest version of all tools (vs. the pinned versions + # with Go modules). + go get -u \ + golang.org/x/lint/golint \ + golang.org/x/tools/cmd/goimports \ + honnef.co/go/tools/cmd/staticcheck \ + github.com/client9/misspell/cmd/misspell + fi + if [[ -z "${VET_SKIP_PROTO}" ]]; then + if [[ "${TRAVIS}" = "true" ]]; then + PROTOBUF_VERSION=3.3.0 + PROTOC_FILENAME=protoc-${PROTOBUF_VERSION}-linux-x86_64.zip + pushd /home/travis + wget https://github.com/google/protobuf/releases/download/v${PROTOBUF_VERSION}/${PROTOC_FILENAME} + unzip ${PROTOC_FILENAME} + bin/protoc --version + popd + elif [[ "${GITHUB_ACTIONS}" = "true" ]]; then + PROTOBUF_VERSION=3.3.0 + PROTOC_FILENAME=protoc-${PROTOBUF_VERSION}-linux-x86_64.zip + pushd /home/runner/go + wget https://github.com/google/protobuf/releases/download/v${PROTOBUF_VERSION}/${PROTOC_FILENAME} + unzip ${PROTOC_FILENAME} + bin/protoc --version + popd + elif not which protoc > /dev/null; then + die "Please install protoc into your path" + fi + fi + exit 0 +elif [[ "$#" -ne 0 ]]; then + die "Unknown argument(s): $*" +fi + +# - Ensure all source files contain a copyright message. +not git grep -L "\(Copyright [0-9]\{4,\} gRPC authors\)\|DO NOT EDIT" -- '*.go' + +# - Make sure all tests in grpc and grpc/test use leakcheck via Teardown. +not grep 'func Test[^(]' *_test.go +not grep 'func Test[^(]' test/*.go + +# - Do not import x/net/context. +not git grep -l 'x/net/context' -- "*.go" + +# - Do not import math/rand for real library code. Use internal/grpcrand for +# thread safety. +git grep -l '"math/rand"' -- "*.go" 2>&1 | not grep -v '^examples\|^stress\|grpcrand\|^benchmark\|wrr_test' + +# - Do not call grpclog directly. Use grpclog.Component instead. +git grep -l 'grpclog.I\|grpclog.W\|grpclog.E\|grpclog.F\|grpclog.V' -- "*.go" | not grep -v '^grpclog/component.go\|^internal/grpctest/tlogger_test.go' + +# - Ensure all ptypes proto packages are renamed when importing. +not git grep "\(import \|^\s*\)\"github.com/golang/protobuf/ptypes/" -- "*.go" + +# - Ensure all xds proto imports are renamed to *pb or *grpc. +git grep '"github.com/envoyproxy/go-control-plane/envoy' -- '*.go' ':(exclude)*.pb.go' | not grep -v 'pb "\|grpc "' + +# - Check imports that are illegal in appengine (until Go 1.11). +# TODO: Remove when we drop Go 1.10 support +go list -f {{.Dir}} ./... | xargs go run test/go_vet/vet.go + +# - gofmt, goimports, golint (with exceptions for generated code), go vet. +gofmt -s -d -l . 2>&1 | fail_on_output +goimports -l . 2>&1 | not grep -vE "\.pb\.go" +golint ./... 2>&1 | not grep -vE "\.pb\.go:" +go vet -all ./... + +misspell -error . + +# - Check that generated proto files are up to date. +if [[ -z "${VET_SKIP_PROTO}" ]]; then + PATH="/home/travis/bin:${PATH}" make proto && \ + git status --porcelain 2>&1 | fail_on_output || \ + (git status; git --no-pager diff; exit 1) +fi + +# - Check that our modules are tidy. +if go help mod >& /dev/null; then + find . -name 'go.mod' | xargs -IXXX bash -c 'cd $(dirname XXX); go mod tidy' + git status --porcelain 2>&1 | fail_on_output || \ + (git status; git --no-pager diff; exit 1) +fi + +# - Collection of static analysis checks +# +# TODO(dfawley): don't use deprecated functions in examples or first-party +# plugins. +SC_OUT="$(mktemp)" +staticcheck -go 1.9 -checks 'inherit,-ST1015' ./... > "${SC_OUT}" || true +# Error if anything other than deprecation warnings are printed. +not grep -v "is deprecated:.*SA1019" "${SC_OUT}" +# Only ignore the following deprecated types/fields/functions. +not grep -Fv '.CredsBundle +.HeaderMap +.Metadata is deprecated: use Attributes +.NewAddress +.NewServiceConfig +.Type is deprecated: use Attributes +balancer.ErrTransientFailure +balancer.Picker +grpc.CallCustomCodec +grpc.Code +grpc.Compressor +grpc.CustomCodec +grpc.Decompressor +grpc.MaxMsgSize +grpc.MethodConfig +grpc.NewGZIPCompressor +grpc.NewGZIPDecompressor +grpc.RPCCompressor +grpc.RPCDecompressor +grpc.ServiceConfig +grpc.WithBalancerName +grpc.WithCompressor +grpc.WithDecompressor +grpc.WithDialer +grpc.WithMaxMsgSize +grpc.WithServiceConfig +grpc.WithTimeout +http.CloseNotifier +info.SecurityVersion +resolver.Backend +resolver.GRPCLB +extDesc.Filename is deprecated +BuildVersion is deprecated +github.com/golang/protobuf/jsonpb is deprecated +proto is deprecated +xxx_messageInfo_ +proto.InternalMessageInfo is deprecated +proto.EnumName is deprecated +proto.ErrInternalBadWireType is deprecated +proto.FileDescriptor is deprecated +proto.Marshaler is deprecated +proto.MessageType is deprecated +proto.RegisterEnum is deprecated +proto.RegisterFile is deprecated +proto.RegisterType is deprecated +proto.RegisterExtension is deprecated +proto.RegisteredExtension is deprecated +proto.RegisteredExtensions is deprecated +proto.RegisterMapType is deprecated +proto.Unmarshaler is deprecated' "${SC_OUT}" + +# - special golint on package comments. +lint_package_comment_per_package() { + # Number of files in this go package. + fileCount=$(go list -f '{{len .GoFiles}}' $1) + if [ ${fileCount} -eq 0 ]; then + return 0 + fi + # Number of package errors generated by golint. + lintPackageCommentErrorsCount=$(golint --min_confidence 0 $1 | grep -c "should have a package comment") + # golint complains about every file that's missing the package comment. If the + # number of files for this package is greater than the number of errors, there's + # at least one file with package comment, good. Otherwise, fail. + if [ ${fileCount} -le ${lintPackageCommentErrorsCount} ]; then + echo "Package $1 (with ${fileCount} files) is missing package comment" + return 1 + fi +} +lint_package_comment() { + set +ex + + count=0 + for i in $(go list ./...); do + lint_package_comment_per_package "$i" + ((count += $?)) + done + + set -ex + return $count +} +lint_package_comment + +echo SUCCESS -- cgit v1.2.3-54-g00ecf