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Diffstat (limited to 'vendor/google.golang.org/grpc')
32 files changed, 0 insertions, 8519 deletions
diff --git a/vendor/google.golang.org/grpc/LICENSE b/vendor/google.golang.org/grpc/LICENSE deleted file mode 100644 index f4988b450..000000000 --- a/vendor/google.golang.org/grpc/LICENSE +++ /dev/null @@ -1,28 +0,0 @@ -Copyright 2014, Google Inc. -All rights reserved. - -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions are -met: - - * Redistributions of source code must retain the above copyright -notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above -copyright notice, this list of conditions and the following disclaimer -in the documentation and/or other materials provided with the -distribution. - * Neither the name of Google Inc. nor the names of its -contributors may be used to endorse or promote products derived from -this software without specific prior written permission. - -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/vendor/google.golang.org/grpc/PATENTS b/vendor/google.golang.org/grpc/PATENTS deleted file mode 100644 index 69b47959f..000000000 --- a/vendor/google.golang.org/grpc/PATENTS +++ /dev/null @@ -1,22 +0,0 @@ -Additional IP Rights Grant (Patents) - -"This implementation" means the copyrightable works distributed by -Google as part of the gRPC project. - -Google hereby grants to You a perpetual, worldwide, non-exclusive, -no-charge, royalty-free, irrevocable (except as stated in this section) -patent license to make, have made, use, offer to sell, sell, import, -transfer and otherwise run, modify and propagate the contents of this -implementation of gRPC, where such license applies only to those patent -claims, both currently owned or controlled by Google and acquired in -the future, licensable by Google that are necessarily infringed by this -implementation of gRPC. This grant does not include claims that would be -infringed only as a consequence of further modification of this -implementation. If you or your agent or exclusive licensee institute or -order or agree to the institution of patent litigation against any -entity (including a cross-claim or counterclaim in a lawsuit) alleging -that this implementation of gRPC or any code incorporated within this -implementation of gRPC constitutes direct or contributory patent -infringement, or inducement of patent infringement, then any patent -rights granted to you under this License for this implementation of gRPC -shall terminate as of the date such litigation is filed. diff --git a/vendor/google.golang.org/grpc/README.md b/vendor/google.golang.org/grpc/README.md deleted file mode 100644 index 110a8cf42..000000000 --- a/vendor/google.golang.org/grpc/README.md +++ /dev/null @@ -1,32 +0,0 @@ -#gRPC-Go - -[](https://travis-ci.org/grpc/grpc-go) [](https://godoc.org/google.golang.org/grpc) - -The Go implementation of [gRPC](http://www.grpc.io/): A high performance, open source, general RPC framework that puts mobile and HTTP/2 first. For more information see the [gRPC Quick Start](http://www.grpc.io/docs/) guide. - -Installation ------------- - -To install this package, you need to install Go and setup your Go workspace on your computer. The simplest way to install the library is to run: - -``` -$ go get google.golang.org/grpc -``` - -Prerequisites -------------- - -This requires Go 1.5 or later. - -Constraints ------------ -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](http://godoc.org/google.golang.org/grpc?imports), you need a discussion with gRPC-Go authors and consultants. - -Documentation -------------- -See [API documentation](https://godoc.org/google.golang.org/grpc) for package and API descriptions and find examples in the [examples directory](examples/). - -Status ------- -GA - diff --git a/vendor/google.golang.org/grpc/backoff.go b/vendor/google.golang.org/grpc/backoff.go deleted file mode 100644 index c99024ee3..000000000 --- a/vendor/google.golang.org/grpc/backoff.go +++ /dev/null @@ -1,80 +0,0 @@ -package grpc - -import ( - "math/rand" - "time" -) - -// DefaultBackoffConfig uses values specified for backoff in -// https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md. -var ( - DefaultBackoffConfig = BackoffConfig{ - MaxDelay: 120 * time.Second, - baseDelay: 1.0 * time.Second, - factor: 1.6, - jitter: 0.2, - } -) - -// backoffStrategy defines the methodology for backing off after a grpc -// connection failure. -// -// This is unexported until the gRPC project decides whether or not to allow -// alternative backoff strategies. Once a decision is made, this type and its -// method may be exported. -type backoffStrategy interface { - // backoff returns the amount of time to wait before the next retry given - // the number of consecutive failures. - backoff(retries int) time.Duration -} - -// BackoffConfig defines the parameters for the default gRPC backoff strategy. -type BackoffConfig struct { - // MaxDelay is the upper bound of backoff delay. - MaxDelay time.Duration - - // TODO(stevvooe): The following fields are not exported, as allowing - // changes would violate the current gRPC specification for backoff. If - // gRPC decides to allow more interesting backoff strategies, these fields - // may be opened up in the future. - - // baseDelay is the amount of time to wait before retrying after the first - // failure. - baseDelay time.Duration - - // factor is applied to the backoff after each retry. - factor float64 - - // jitter provides a range to randomize backoff delays. - jitter float64 -} - -func setDefaults(bc *BackoffConfig) { - md := bc.MaxDelay - *bc = DefaultBackoffConfig - - if md > 0 { - bc.MaxDelay = md - } -} - -func (bc BackoffConfig) backoff(retries int) time.Duration { - if retries == 0 { - return bc.baseDelay - } - backoff, max := float64(bc.baseDelay), float64(bc.MaxDelay) - for backoff < max && retries > 0 { - backoff *= bc.factor - 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.jitter*(rand.Float64()*2-1) - if backoff < 0 { - return 0 - } - return time.Duration(backoff) -} diff --git a/vendor/google.golang.org/grpc/balancer.go b/vendor/google.golang.org/grpc/balancer.go deleted file mode 100644 index 9d943fbad..000000000 --- a/vendor/google.golang.org/grpc/balancer.go +++ /dev/null @@ -1,400 +0,0 @@ -/* - * - * Copyright 2016, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -package grpc - -import ( - "fmt" - "sync" - - "golang.org/x/net/context" - "google.golang.org/grpc/codes" - "google.golang.org/grpc/credentials" - "google.golang.org/grpc/grpclog" - "google.golang.org/grpc/naming" -) - -// Address represents a server the client connects to. -// This is the EXPERIMENTAL API and may be changed or extended in the future. -type Address struct { - // Addr is the server address on which a connection will be established. - Addr string - // Metadata is the information associated with Addr, which may be used - // to make load balancing decision. - Metadata interface{} -} - -// BalancerConfig specifies the configurations for Balancer. -type BalancerConfig 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 -} - -// BalancerGetOptions configures a Get call. -// This is the EXPERIMENTAL API and may be changed or extended in the future. -type BalancerGetOptions struct { - // BlockingWait specifies whether Get should block when there is no - // connected address. - BlockingWait bool -} - -// Balancer chooses network addresses for RPCs. -// This is the EXPERIMENTAL API and may be changed or extended in the future. -type Balancer interface { - // Start does the initialization work to bootstrap a Balancer. For example, - // this function may start the name resolution and watch the updates. It will - // be called when dialing. - Start(target string, config BalancerConfig) error - // Up informs the Balancer that gRPC has a connection to the server at - // addr. It returns down which is called once the connection to addr gets - // lost or closed. - // TODO: It is not clear how to construct and take advantage of the meaningful error - // parameter for down. Need realistic demands to guide. - Up(addr Address) (down func(error)) - // Get gets the address of a server for the RPC corresponding to ctx. - // i) If it returns a connected address, gRPC internals issues the RPC on the - // connection to this address; - // ii) If it returns an address on which the connection is under construction - // (initiated by Notify(...)) but not connected, gRPC internals - // * fails RPC if the RPC is fail-fast and connection is in the TransientFailure or - // Shutdown state; - // or - // * issues RPC on the connection otherwise. - // iii) If it returns an address on which the connection does not exist, gRPC - // internals treats it as an error and will fail the corresponding RPC. - // - // Therefore, the following is the recommended rule when writing a custom Balancer. - // If opts.BlockingWait is true, it should return a connected address or - // block if there is no connected address. It should respect the timeout or - // cancellation of ctx when blocking. If opts.BlockingWait is false (for fail-fast - // RPCs), it should return an address it has notified via Notify(...) immediately - // instead of blocking. - // - // The function returns put which is called once the rpc has completed or failed. - // put can collect and report RPC stats to a remote load balancer. - // - // This function should only return the errors Balancer cannot recover by itself. - // gRPC internals will fail the RPC if an error is returned. - Get(ctx context.Context, opts BalancerGetOptions) (addr Address, put func(), err error) - // Notify returns a channel that is used by gRPC internals to watch the addresses - // gRPC needs to connect. The addresses might be from a name resolver or remote - // load balancer. gRPC internals will compare it with the existing connected - // addresses. If the address Balancer notified is not in the existing connected - // addresses, gRPC starts to connect the address. If an address in the existing - // connected addresses is not in the notification list, the corresponding connection - // is shutdown gracefully. Otherwise, there are no operations to take. Note that - // the Address slice must be the full list of the Addresses which should be connected. - // It is NOT delta. - Notify() <-chan []Address - // Close shuts down the balancer. - Close() error -} - -// downErr implements net.Error. It is constructed by gRPC internals and passed to the down -// call of Balancer. -type downErr struct { - timeout bool - temporary bool - desc string -} - -func (e downErr) Error() string { return e.desc } -func (e downErr) Timeout() bool { return e.timeout } -func (e downErr) Temporary() bool { return e.temporary } - -func downErrorf(timeout, temporary bool, format string, a ...interface{}) downErr { - return downErr{ - timeout: timeout, - temporary: temporary, - desc: fmt.Sprintf(format, a...), - } -} - -// RoundRobin returns a Balancer that selects addresses round-robin. It uses r to watch -// the name resolution updates and updates the addresses available correspondingly. -func RoundRobin(r naming.Resolver) Balancer { - return &roundRobin{r: r} -} - -type addrInfo struct { - addr Address - connected bool -} - -type roundRobin struct { - r naming.Resolver - w naming.Watcher - addrs []*addrInfo // all the addresses the client should potentially connect - mu sync.Mutex - addrCh chan []Address // the channel to notify gRPC internals the list of addresses the client should connect to. - next int // index of the next address to return for Get() - waitCh chan struct{} // the channel to block when there is no connected address available - done bool // The Balancer is closed. -} - -func (rr *roundRobin) watchAddrUpdates() error { - updates, err := rr.w.Next() - if err != nil { - grpclog.Printf("grpc: the naming watcher stops working due to %v.\n", err) - return err - } - rr.mu.Lock() - defer rr.mu.Unlock() - for _, update := range updates { - addr := Address{ - Addr: update.Addr, - Metadata: update.Metadata, - } - switch update.Op { - case naming.Add: - var exist bool - for _, v := range rr.addrs { - if addr == v.addr { - exist = true - grpclog.Println("grpc: The name resolver wanted to add an existing address: ", addr) - break - } - } - if exist { - continue - } - rr.addrs = append(rr.addrs, &addrInfo{addr: addr}) - case naming.Delete: - for i, v := range rr.addrs { - if addr == v.addr { - copy(rr.addrs[i:], rr.addrs[i+1:]) - rr.addrs = rr.addrs[:len(rr.addrs)-1] - break - } - } - default: - grpclog.Println("Unknown update.Op ", update.Op) - } - } - // Make a copy of rr.addrs and write it onto rr.addrCh so that gRPC internals gets notified. - open := make([]Address, len(rr.addrs)) - for i, v := range rr.addrs { - open[i] = v.addr - } - if rr.done { - return ErrClientConnClosing - } - rr.addrCh <- open - return nil -} - -func (rr *roundRobin) Start(target string, config BalancerConfig) error { - rr.mu.Lock() - defer rr.mu.Unlock() - if rr.done { - return ErrClientConnClosing - } - if rr.r == nil { - // If there is no name resolver installed, it is not needed to - // do name resolution. In this case, target is added into rr.addrs - // as the only address available and rr.addrCh stays nil. - rr.addrs = append(rr.addrs, &addrInfo{addr: Address{Addr: target}}) - return nil - } - w, err := rr.r.Resolve(target) - if err != nil { - return err - } - rr.w = w - rr.addrCh = make(chan []Address) - go func() { - for { - if err := rr.watchAddrUpdates(); err != nil { - return - } - } - }() - return nil -} - -// Up sets the connected state of addr and sends notification if there are pending -// Get() calls. -func (rr *roundRobin) Up(addr Address) func(error) { - rr.mu.Lock() - defer rr.mu.Unlock() - var cnt int - for _, a := range rr.addrs { - if a.addr == addr { - if a.connected { - return nil - } - a.connected = true - } - if a.connected { - cnt++ - } - } - // addr is only one which is connected. Notify the Get() callers who are blocking. - if cnt == 1 && rr.waitCh != nil { - close(rr.waitCh) - rr.waitCh = nil - } - return func(err error) { - rr.down(addr, err) - } -} - -// down unsets the connected state of addr. -func (rr *roundRobin) down(addr Address, err error) { - rr.mu.Lock() - defer rr.mu.Unlock() - for _, a := range rr.addrs { - if addr == a.addr { - a.connected = false - break - } - } -} - -// Get returns the next addr in the rotation. -func (rr *roundRobin) Get(ctx context.Context, opts BalancerGetOptions) (addr Address, put func(), err error) { - var ch chan struct{} - rr.mu.Lock() - if rr.done { - rr.mu.Unlock() - err = ErrClientConnClosing - return - } - - if len(rr.addrs) > 0 { - if rr.next >= len(rr.addrs) { - rr.next = 0 - } - next := rr.next - for { - a := rr.addrs[next] - next = (next + 1) % len(rr.addrs) - if a.connected { - addr = a.addr - rr.next = next - rr.mu.Unlock() - return - } - if next == rr.next { - // Has iterated all the possible address but none is connected. - break - } - } - } - if !opts.BlockingWait { - if len(rr.addrs) == 0 { - rr.mu.Unlock() - err = Errorf(codes.Unavailable, "there is no address available") - return - } - // Returns the next addr on rr.addrs for failfast RPCs. - addr = rr.addrs[rr.next].addr - rr.next++ - rr.mu.Unlock() - return - } - // Wait on rr.waitCh for non-failfast RPCs. - if rr.waitCh == nil { - ch = make(chan struct{}) - rr.waitCh = ch - } else { - ch = rr.waitCh - } - rr.mu.Unlock() - for { - select { - case <-ctx.Done(): - err = ctx.Err() - return - case <-ch: - rr.mu.Lock() - if rr.done { - rr.mu.Unlock() - err = ErrClientConnClosing - return - } - - if len(rr.addrs) > 0 { - if rr.next >= len(rr.addrs) { - rr.next = 0 - } - next := rr.next - for { - a := rr.addrs[next] - next = (next + 1) % len(rr.addrs) - if a.connected { - addr = a.addr - rr.next = next - rr.mu.Unlock() - return - } - if next == rr.next { - // Has iterated all the possible address but none is connected. - break - } - } - } - // The newly added addr got removed by Down() again. - if rr.waitCh == nil { - ch = make(chan struct{}) - rr.waitCh = ch - } else { - ch = rr.waitCh - } - rr.mu.Unlock() - } - } -} - -func (rr *roundRobin) Notify() <-chan []Address { - return rr.addrCh -} - -func (rr *roundRobin) Close() error { - rr.mu.Lock() - defer rr.mu.Unlock() - rr.done = true - if rr.w != nil { - rr.w.Close() - } - if rr.waitCh != nil { - close(rr.waitCh) - rr.waitCh = nil - } - if rr.addrCh != nil { - close(rr.addrCh) - } - return nil -} diff --git a/vendor/google.golang.org/grpc/call.go b/vendor/google.golang.org/grpc/call.go deleted file mode 100644 index 772c817ed..000000000 --- a/vendor/google.golang.org/grpc/call.go +++ /dev/null @@ -1,232 +0,0 @@ -/* - * - * Copyright 2014, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -package grpc - -import ( - "bytes" - "io" - "math" - "time" - - "golang.org/x/net/context" - "golang.org/x/net/trace" - "google.golang.org/grpc/codes" - "google.golang.org/grpc/transport" -) - -// recvResponse receives and parses an RPC response. -// On error, it returns the error and indicates whether the call should be retried. -// -// TODO(zhaoq): Check whether the received message sequence is valid. -func recvResponse(dopts dialOptions, t transport.ClientTransport, c *callInfo, stream *transport.Stream, reply interface{}) (err error) { - // Try to acquire header metadata from the server if there is any. - defer func() { - if err != nil { - if _, ok := err.(transport.ConnectionError); !ok { - t.CloseStream(stream, err) - } - } - }() - c.headerMD, err = stream.Header() - if err != nil { - return - } - p := &parser{r: stream} - for { - if err = recv(p, dopts.codec, stream, dopts.dc, reply, math.MaxInt32); err != nil { - if err == io.EOF { - break - } - return - } - } - c.trailerMD = stream.Trailer() - return nil -} - -// sendRequest writes out various information of an RPC such as Context and Message. -func sendRequest(ctx context.Context, codec Codec, compressor Compressor, callHdr *transport.CallHdr, t transport.ClientTransport, args interface{}, opts *transport.Options) (_ *transport.Stream, err error) { - stream, err := t.NewStream(ctx, callHdr) - if err != nil { - return nil, err - } - defer func() { - if err != nil { - // If err is connection error, t will be closed, no need to close stream here. - if _, ok := err.(transport.ConnectionError); !ok { - t.CloseStream(stream, err) - } - } - }() - var cbuf *bytes.Buffer - if compressor != nil { - cbuf = new(bytes.Buffer) - } - outBuf, err := encode(codec, args, compressor, cbuf) - if err != nil { - return nil, Errorf(codes.Internal, "grpc: %v", err) - } - err = t.Write(stream, outBuf, opts) - // t.NewStream(...) could lead to an early rejection of the RPC (e.g., the service/method - // does not exist.) so that t.Write could get io.EOF from wait(...). Leave the following - // recvResponse to get the final status. - if err != nil && err != io.EOF { - return nil, err - } - // Sent successfully. - return stream, nil -} - -// Invoke sends the RPC request on the wire and returns after response is received. -// Invoke is called by generated code. Also users can call Invoke directly when it -// is really needed in their use cases. -func Invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) error { - 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 invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) (err error) { - c := defaultCallInfo - for _, o := range opts { - if err := o.before(&c); err != nil { - return toRPCErr(err) - } - } - defer func() { - for _, o := range opts { - o.after(&c) - } - }() - if EnableTracing { - c.traceInfo.tr = trace.New("grpc.Sent."+methodFamily(method), method) - defer c.traceInfo.tr.Finish() - c.traceInfo.firstLine.client = true - if deadline, ok := ctx.Deadline(); ok { - c.traceInfo.firstLine.deadline = deadline.Sub(time.Now()) - } - c.traceInfo.tr.LazyLog(&c.traceInfo.firstLine, false) - // TODO(dsymonds): Arrange for c.traceInfo.firstLine.remoteAddr to be set. - defer func() { - if err != nil { - c.traceInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true) - c.traceInfo.tr.SetError() - } - }() - } - topts := &transport.Options{ - Last: true, - Delay: false, - } - for { - var ( - err error - t transport.ClientTransport - stream *transport.Stream - // Record the put handler from Balancer.Get(...). It is called once the - // RPC has completed or failed. - put func() - ) - // TODO(zhaoq): Need a formal spec of fail-fast. - callHdr := &transport.CallHdr{ - Host: cc.authority, - Method: method, - } - if cc.dopts.cp != nil { - callHdr.SendCompress = cc.dopts.cp.Type() - } - gopts := BalancerGetOptions{ - BlockingWait: !c.failFast, - } - t, put, err = cc.getTransport(ctx, gopts) - if err != nil { - // TODO(zhaoq): Probably revisit the error handling. - if _, ok := err.(*rpcError); ok { - return err - } - if err == errConnClosing || err == errConnUnavailable { - if c.failFast { - return Errorf(codes.Unavailable, "%v", err) - } - continue - } - // All the other errors are treated as Internal errors. - return Errorf(codes.Internal, "%v", err) - } - if c.traceInfo.tr != nil { - c.traceInfo.tr.LazyLog(&payload{sent: true, msg: args}, true) - } - stream, err = sendRequest(ctx, cc.dopts.codec, cc.dopts.cp, callHdr, t, args, topts) - if err != nil { - if put != nil { - put() - put = nil - } - // Retry a non-failfast RPC when - // i) there is a connection error; or - // ii) the server started to drain before this RPC was initiated. - if _, ok := err.(transport.ConnectionError); ok || err == transport.ErrStreamDrain { - if c.failFast { - return toRPCErr(err) - } - continue - } - return toRPCErr(err) - } - err = recvResponse(cc.dopts, t, &c, stream, reply) - if err != nil { - if put != nil { - put() - put = nil - } - if _, ok := err.(transport.ConnectionError); ok || err == transport.ErrStreamDrain { - if c.failFast { - return toRPCErr(err) - } - continue - } - return toRPCErr(err) - } - if c.traceInfo.tr != nil { - c.traceInfo.tr.LazyLog(&payload{sent: false, msg: reply}, true) - } - t.CloseStream(stream, nil) - if put != nil { - put() - put = nil - } - return Errorf(stream.StatusCode(), "%s", stream.StatusDesc()) - } -} diff --git a/vendor/google.golang.org/grpc/clientconn.go b/vendor/google.golang.org/grpc/clientconn.go deleted file mode 100644 index 61674729a..000000000 --- a/vendor/google.golang.org/grpc/clientconn.go +++ /dev/null @@ -1,888 +0,0 @@ -/* - * - * Copyright 2014, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -package grpc - -import ( - "errors" - "fmt" - "net" - "strings" - "sync" - "time" - - "golang.org/x/net/context" - "golang.org/x/net/trace" - "google.golang.org/grpc/credentials" - "google.golang.org/grpc/grpclog" - "google.golang.org/grpc/transport" -) - -var ( - // ErrClientConnClosing indicates that the operation is illegal because - // the ClientConn is closing. - ErrClientConnClosing = errors.New("grpc: the client connection is closing") - // ErrClientConnTimeout indicates that the ClientConn cannot establish the - // underlying connections within the specified timeout. - ErrClientConnTimeout = errors.New("grpc: timed out when dialing") - - // 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)") - // 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)") - // errNetworkIO indicates that the connection is down due to some network I/O error. - errNetworkIO = errors.New("grpc: failed with network I/O error") - // 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") - // errConnUnavailable indicates that the connection is unavailable. - errConnUnavailable = errors.New("grpc: the connection is unavailable") - errNoAddr = errors.New("grpc: there is no address available to dial") - // minimum time to give a connection to complete - minConnectTimeout = 20 * time.Second -) - -// dialOptions configure a Dial call. dialOptions are set by the DialOption -// values passed to Dial. -type dialOptions struct { - unaryInt UnaryClientInterceptor - streamInt StreamClientInterceptor - codec Codec - cp Compressor - dc Decompressor - bs backoffStrategy - balancer Balancer - block bool - insecure bool - timeout time.Duration - copts transport.ConnectOptions -} - -// DialOption configures how we set up the connection. -type DialOption func(*dialOptions) - -// WithCodec returns a DialOption which sets a codec for message marshaling and unmarshaling. -func WithCodec(c Codec) DialOption { - return func(o *dialOptions) { - o.codec = c - } -} - -// WithCompressor returns a DialOption which sets a CompressorGenerator for generating message -// compressor. -func WithCompressor(cp Compressor) DialOption { - return func(o *dialOptions) { - o.cp = cp - } -} - -// WithDecompressor returns a DialOption which sets a DecompressorGenerator for generating -// message decompressor. -func WithDecompressor(dc Decompressor) DialOption { - return func(o *dialOptions) { - o.dc = dc - } -} - -// WithBalancer returns a DialOption which sets a load balancer. -func WithBalancer(b Balancer) DialOption { - return func(o *dialOptions) { - o.balancer = b - } -} - -// WithBackoffMaxDelay configures the dialer to use the provided maximum delay -// when backing off after failed connection attempts. -func WithBackoffMaxDelay(md time.Duration) DialOption { - return WithBackoffConfig(BackoffConfig{MaxDelay: md}) -} - -// WithBackoffConfig configures the dialer to use the provided backoff -// parameters after connection failures. -// -// Use WithBackoffMaxDelay until more parameters on BackoffConfig are opened up -// for use. -func WithBackoffConfig(b BackoffConfig) DialOption { - // Set defaults to ensure that provided BackoffConfig is valid and - // unexported fields get default values. - setDefaults(&b) - return withBackoff(b) -} - -// withBackoff sets the backoff strategy used for retries after a -// failed connection attempt. -// -// This can be exported if arbitrary backoff strategies are allowed by gRPC. -func withBackoff(bs backoffStrategy) DialOption { - return 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 func(o *dialOptions) { - o.block = 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 func(o *dialOptions) { - o.insecure = true - } -} - -// WithTransportCredentials returns a DialOption which configures a -// connection level security credentials (e.g., TLS/SSL). -func WithTransportCredentials(creds credentials.TransportCredentials) DialOption { - return func(o *dialOptions) { - o.copts.TransportCredentials = creds - } -} - -// WithPerRPCCredentials returns a DialOption which sets -// credentials which will place auth state on each outbound RPC. -func WithPerRPCCredentials(creds credentials.PerRPCCredentials) DialOption { - return func(o *dialOptions) { - o.copts.PerRPCCredentials = append(o.copts.PerRPCCredentials, creds) - } -} - -// WithTimeout returns a DialOption that configures a timeout for dialing a ClientConn -// initially. This is valid if and only if WithBlock() is present. -func WithTimeout(d time.Duration) DialOption { - return func(o *dialOptions) { - o.timeout = d - } -} - -// WithDialer returns a DialOption that specifies a function to use for dialing network addresses. -func WithDialer(f func(string, time.Duration) (net.Conn, error)) DialOption { - return func(o *dialOptions) { - o.copts.Dialer = func(ctx context.Context, addr string) (net.Conn, error) { - if deadline, ok := ctx.Deadline(); ok { - return f(addr, deadline.Sub(time.Now())) - } - return f(addr, 0) - } - } -} - -// WithUserAgent returns a DialOption that specifies a user agent string for all the RPCs. -func WithUserAgent(s string) DialOption { - return func(o *dialOptions) { - o.copts.UserAgent = s - } -} - -// WithUnaryInterceptor returns a DialOption that specifies the interceptor for unary RPCs. -func WithUnaryInterceptor(f UnaryClientInterceptor) DialOption { - return func(o *dialOptions) { - o.unaryInt = f - } -} - -// WithStreamInterceptor returns a DialOption that specifies the interceptor for streaming RPCs. -func WithStreamInterceptor(f StreamClientInterceptor) DialOption { - return func(o *dialOptions) { - o.streamInt = f - } -} - -// 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. ctx can be used to -// cancel or expire the pending connecting. 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. -// This is the EXPERIMENTAL API. -func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *ClientConn, err error) { - cc := &ClientConn{ - target: target, - conns: make(map[Address]*addrConn), - } - cc.ctx, cc.cancel = context.WithCancel(context.Background()) - defer func() { - select { - case <-ctx.Done(): - conn, err = nil, ctx.Err() - default: - } - - if err != nil { - cc.Close() - } - }() - - for _, opt := range opts { - opt(&cc.dopts) - } - - // Set defaults. - if cc.dopts.codec == nil { - cc.dopts.codec = protoCodec{} - } - if cc.dopts.bs == nil { - cc.dopts.bs = DefaultBackoffConfig - } - creds := cc.dopts.copts.TransportCredentials - if creds != nil && creds.Info().ServerName != "" { - cc.authority = creds.Info().ServerName - } else { - colonPos := strings.LastIndex(target, ":") - if colonPos == -1 { - colonPos = len(target) - } - cc.authority = target[:colonPos] - } - var ok bool - waitC := make(chan error, 1) - go func() { - var addrs []Address - if cc.dopts.balancer == nil { - // Connect to target directly if balancer is nil. - addrs = append(addrs, Address{Addr: target}) - } else { - var credsClone credentials.TransportCredentials - if creds != nil { - credsClone = creds.Clone() - } - config := BalancerConfig{ - DialCreds: credsClone, - } - if err := cc.dopts.balancer.Start(target, config); err != nil { - waitC <- err - return - } - ch := cc.dopts.balancer.Notify() - if ch == nil { - // There is no name resolver installed. - addrs = append(addrs, Address{Addr: target}) - } else { - addrs, ok = <-ch - if !ok || len(addrs) == 0 { - waitC <- errNoAddr - return - } - } - } - for _, a := range addrs { - if err := cc.resetAddrConn(a, false, nil); err != nil { - waitC <- err - return - } - } - close(waitC) - }() - var timeoutCh <-chan time.Time - if cc.dopts.timeout > 0 { - timeoutCh = time.After(cc.dopts.timeout) - } - select { - case <-ctx.Done(): - return nil, ctx.Err() - case err := <-waitC: - if err != nil { - return nil, err - } - case <-timeoutCh: - return nil, ErrClientConnTimeout - } - // If balancer is nil or balancer.Notify() is nil, ok will be false here. - // The lbWatcher goroutine will not be created. - if ok { - go cc.lbWatcher() - } - return cc, nil -} - -// ConnectivityState indicates the state of a client connection. -type ConnectivityState int - -const ( - // Idle indicates the ClientConn is idle. - Idle ConnectivityState = iota - // Connecting indicates the ClienConn 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 -) - -func (s ConnectivityState) 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: - panic(fmt.Sprintf("unknown connectivity state: %d", s)) - } -} - -// ClientConn represents a client connection to an RPC server. -type ClientConn struct { - ctx context.Context - cancel context.CancelFunc - - target string - authority string - dopts dialOptions - - mu sync.RWMutex - conns map[Address]*addrConn -} - -func (cc *ClientConn) lbWatcher() { - for addrs := range cc.dopts.balancer.Notify() { - var ( - add []Address // Addresses need to setup connections. - del []*addrConn // Connections need to tear down. - ) - cc.mu.Lock() - for _, a := range addrs { - if _, ok := cc.conns[a]; !ok { - add = append(add, a) - } - } - for k, c := range cc.conns { - var keep bool - for _, a := range addrs { - if k == a { - keep = true - break - } - } - if !keep { - del = append(del, c) - delete(cc.conns, c.addr) - } - } - cc.mu.Unlock() - for _, a := range add { - cc.resetAddrConn(a, true, nil) - } - for _, c := range del { - c.tearDown(errConnDrain) - } - } -} - -// resetAddrConn creates an addrConn for addr and adds it to cc.conns. -// If there is an old addrConn for addr, it will be torn down, using tearDownErr as the reason. -// If tearDownErr is nil, errConnDrain will be used instead. -func (cc *ClientConn) resetAddrConn(addr Address, skipWait bool, tearDownErr error) error { - ac := &addrConn{ - cc: cc, - addr: addr, - dopts: cc.dopts, - } - ac.ctx, ac.cancel = context.WithCancel(cc.ctx) - ac.stateCV = sync.NewCond(&ac.mu) - if EnableTracing { - ac.events = trace.NewEventLog("grpc.ClientConn", ac.addr.Addr) - } - if !ac.dopts.insecure { - if ac.dopts.copts.TransportCredentials == nil { - return errNoTransportSecurity - } - } else { - if ac.dopts.copts.TransportCredentials != nil { - return errCredentialsConflict - } - for _, cd := range ac.dopts.copts.PerRPCCredentials { - if cd.RequireTransportSecurity() { - return errTransportCredentialsMissing - } - } - } - // 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 ErrClientConnClosing - } - stale := cc.conns[ac.addr] - cc.conns[ac.addr] = ac - cc.mu.Unlock() - if stale != nil { - // There is an addrConn alive on ac.addr already. This could be due to - // 1) a buggy Balancer notifies duplicated Addresses; - // 2) goaway was received, a new ac will replace the old ac. - // The old ac should be deleted from cc.conns, but the - // underlying transport should drain rather than close. - if tearDownErr == nil { - // tearDownErr is nil if resetAddrConn is called by - // 1) Dial - // 2) lbWatcher - // In both cases, the stale ac should drain, not close. - stale.tearDown(errConnDrain) - } else { - stale.tearDown(tearDownErr) - } - } - // skipWait may overwrite the decision in ac.dopts.block. - if ac.dopts.block && !skipWait { - if err := ac.resetTransport(false); err != nil { - if err != errConnClosing { - // Tear down ac and delete it from cc.conns. - cc.mu.Lock() - delete(cc.conns, ac.addr) - cc.mu.Unlock() - ac.tearDown(err) - } - if e, ok := err.(transport.ConnectionError); ok && !e.Temporary() { - return e.Origin() - } - return err - } - // Start to monitor the error status of transport. - go ac.transportMonitor() - } else { - // Start a goroutine connecting to the server asynchronously. - go func() { - if err := ac.resetTransport(false); err != nil { - grpclog.Printf("Failed to dial %s: %v; please retry.", ac.addr.Addr, err) - if err != errConnClosing { - // Keep this ac in cc.conns, to get the reason it's torn down. - ac.tearDown(err) - } - return - } - ac.transportMonitor() - }() - } - return nil -} - -func (cc *ClientConn) getTransport(ctx context.Context, opts BalancerGetOptions) (transport.ClientTransport, func(), error) { - var ( - ac *addrConn - ok bool - put func() - ) - if cc.dopts.balancer == nil { - // If balancer is nil, there should be only one addrConn available. - cc.mu.RLock() - if cc.conns == nil { - cc.mu.RUnlock() - return nil, nil, toRPCErr(ErrClientConnClosing) - } - for _, ac = range cc.conns { - // Break after the first iteration to get the first addrConn. - ok = true - break - } - cc.mu.RUnlock() - } else { - var ( - addr Address - err error - ) - addr, put, err = cc.dopts.balancer.Get(ctx, opts) - if err != nil { - return nil, nil, toRPCErr(err) - } - cc.mu.RLock() - if cc.conns == nil { - cc.mu.RUnlock() - return nil, nil, toRPCErr(ErrClientConnClosing) - } - ac, ok = cc.conns[addr] - cc.mu.RUnlock() - } - if !ok { - if put != nil { - put() - } - return nil, nil, errConnClosing - } - t, err := ac.wait(ctx, cc.dopts.balancer != nil, !opts.BlockingWait) - if err != nil { - if put != nil { - put() - } - return nil, nil, err - } - return t, put, nil -} - -// Close tears down the ClientConn and all underlying connections. -func (cc *ClientConn) Close() error { - cc.cancel() - - cc.mu.Lock() - if cc.conns == nil { - cc.mu.Unlock() - return ErrClientConnClosing - } - conns := cc.conns - cc.conns = nil - cc.mu.Unlock() - if cc.dopts.balancer != nil { - cc.dopts.balancer.Close() - } - for _, ac := range conns { - ac.tearDown(ErrClientConnClosing) - } - return nil -} - -// addrConn is a network connection to a given address. -type addrConn struct { - ctx context.Context - cancel context.CancelFunc - - cc *ClientConn - addr Address - dopts dialOptions - events trace.EventLog - - mu sync.Mutex - state ConnectivityState - stateCV *sync.Cond - down func(error) // the handler called when a connection is down. - // ready is closed and becomes nil when a new transport is up or failed - // due to timeout. - ready chan struct{} - transport transport.ClientTransport - - // The reason this addrConn is torn down. - tearDownErr error -} - -// printf records an event in ac's event log, unless ac has been closed. -// REQUIRES ac.mu is held. -func (ac *addrConn) printf(format string, a ...interface{}) { - if ac.events != nil { - ac.events.Printf(format, a...) - } -} - -// errorf records an error in ac's event log, unless ac has been closed. -// REQUIRES ac.mu is held. -func (ac *addrConn) errorf(format string, a ...interface{}) { - if ac.events != nil { - ac.events.Errorf(format, a...) - } -} - -// getState returns the connectivity state of the Conn -func (ac *addrConn) getState() ConnectivityState { - ac.mu.Lock() - defer ac.mu.Unlock() - return ac.state -} - -// waitForStateChange blocks until the state changes to something other than the sourceState. -func (ac *addrConn) waitForStateChange(ctx context.Context, sourceState ConnectivityState) (ConnectivityState, error) { - ac.mu.Lock() - defer ac.mu.Unlock() - if sourceState != ac.state { - return ac.state, nil - } - done := make(chan struct{}) - var err error - go func() { - select { - case <-ctx.Done(): - ac.mu.Lock() - err = ctx.Err() - ac.stateCV.Broadcast() - ac.mu.Unlock() - case <-done: - } - }() - defer close(done) - for sourceState == ac.state { - ac.stateCV.Wait() - if err != nil { - return ac.state, err - } - } - return ac.state, nil -} - -func (ac *addrConn) resetTransport(closeTransport bool) error { - for retries := 0; ; retries++ { - ac.mu.Lock() - ac.printf("connecting") - if ac.state == Shutdown { - // ac.tearDown(...) has been invoked. - ac.mu.Unlock() - return errConnClosing - } - if ac.down != nil { - ac.down(downErrorf(false, true, "%v", errNetworkIO)) - ac.down = nil - } - ac.state = Connecting - ac.stateCV.Broadcast() - t := ac.transport - ac.mu.Unlock() - if closeTransport && t != nil { - t.Close() - } - sleepTime := ac.dopts.bs.backoff(retries) - timeout := minConnectTimeout - if timeout < sleepTime { - timeout = sleepTime - } - ctx, cancel := context.WithTimeout(ac.ctx, timeout) - connectTime := time.Now() - sinfo := transport.TargetInfo{ - Addr: ac.addr.Addr, - Metadata: ac.addr.Metadata, - } - newTransport, err := transport.NewClientTransport(ctx, sinfo, ac.dopts.copts) - if err != nil { - cancel() - - if e, ok := err.(transport.ConnectionError); ok && !e.Temporary() { - return err - } - grpclog.Printf("grpc: addrConn.resetTransport failed to create client transport: %v; Reconnecting to %v", err, ac.addr) - ac.mu.Lock() - if ac.state == Shutdown { - // ac.tearDown(...) has been invoked. - ac.mu.Unlock() - return errConnClosing - } - ac.errorf("transient failure: %v", err) - ac.state = TransientFailure - ac.stateCV.Broadcast() - if ac.ready != nil { - close(ac.ready) - ac.ready = nil - } - ac.mu.Unlock() - closeTransport = false - select { - case <-time.After(sleepTime - time.Since(connectTime)): - case <-ac.ctx.Done(): - return ac.ctx.Err() - } - continue - } - ac.mu.Lock() - ac.printf("ready") - if ac.state == Shutdown { - // ac.tearDown(...) has been invoked. - ac.mu.Unlock() - newTransport.Close() - return errConnClosing - } - ac.state = Ready - ac.stateCV.Broadcast() - ac.transport = newTransport - if ac.ready != nil { - close(ac.ready) - ac.ready = nil - } - if ac.cc.dopts.balancer != nil { - ac.down = ac.cc.dopts.balancer.Up(ac.addr) - } - ac.mu.Unlock() - return nil - } -} - -// Run in a goroutine to track the error in transport and create the -// new transport if an error happens. It returns when the channel is closing. -func (ac *addrConn) transportMonitor() { - for { - ac.mu.Lock() - t := ac.transport - ac.mu.Unlock() - select { - // This is needed to detect the teardown when - // the addrConn is idle (i.e., no RPC in flight). - case <-ac.ctx.Done(): - select { - case <-t.Error(): - t.Close() - default: - } - return - case <-t.GoAway(): - // If GoAway happens without any network I/O error, ac is closed without shutting down the - // underlying transport (the transport will be closed when all the pending RPCs finished or - // failed.). - // If GoAway and some network I/O error happen concurrently, ac and its underlying transport - // are closed. - // In both cases, a new ac is created. - select { - case <-t.Error(): - ac.cc.resetAddrConn(ac.addr, true, errNetworkIO) - default: - ac.cc.resetAddrConn(ac.addr, true, errConnDrain) - } - return - case <-t.Error(): - select { - case <-ac.ctx.Done(): - t.Close() - return - case <-t.GoAway(): - ac.cc.resetAddrConn(ac.addr, true, errNetworkIO) - return - default: - } - ac.mu.Lock() - if ac.state == Shutdown { - // ac has been shutdown. - ac.mu.Unlock() - return - } - ac.state = TransientFailure - ac.stateCV.Broadcast() - ac.mu.Unlock() - if err := ac.resetTransport(true); err != nil { - ac.mu.Lock() - ac.printf("transport exiting: %v", err) - ac.mu.Unlock() - grpclog.Printf("grpc: addrConn.transportMonitor exits due to: %v", err) - if err != errConnClosing { - // Keep this ac in cc.conns, to get the reason it's torn down. - ac.tearDown(err) - } - return - } - } - } -} - -// wait blocks until i) the new transport is up or ii) ctx is done or iii) ac is closed or -// iv) transport is in TransientFailure and there is a balancer/failfast is true. -func (ac *addrConn) wait(ctx context.Context, hasBalancer, failfast bool) (transport.ClientTransport, error) { - for { - ac.mu.Lock() - switch { - case ac.state == Shutdown: - if failfast || !hasBalancer { - // RPC is failfast or balancer is nil. This RPC should fail with ac.tearDownErr. - err := ac.tearDownErr - ac.mu.Unlock() - return nil, err - } - ac.mu.Unlock() - return nil, errConnClosing - case ac.state == Ready: - ct := ac.transport - ac.mu.Unlock() - return ct, nil - case ac.state == TransientFailure: - if failfast || hasBalancer { - ac.mu.Unlock() - return nil, errConnUnavailable - } - } - ready := ac.ready - if ready == nil { - ready = make(chan struct{}) - ac.ready = ready - } - ac.mu.Unlock() - select { - case <-ctx.Done(): - return nil, toRPCErr(ctx.Err()) - // Wait until the new transport is ready or failed. - case <-ready: - } - } -} - -// 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.cancel() - - ac.mu.Lock() - defer ac.mu.Unlock() - if ac.down != nil { - ac.down(downErrorf(false, false, "%v", err)) - ac.down = nil - } - if err == errConnDrain && ac.transport != 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. - ac.transport.GracefulClose() - } - if ac.state == Shutdown { - return - } - ac.state = Shutdown - ac.tearDownErr = err - ac.stateCV.Broadcast() - if ac.events != nil { - ac.events.Finish() - ac.events = nil - } - if ac.ready != nil { - close(ac.ready) - ac.ready = nil - } - if ac.transport != nil && err != errConnDrain { - ac.transport.Close() - } - return -} diff --git a/vendor/google.golang.org/grpc/codes/code_string.go b/vendor/google.golang.org/grpc/codes/code_string.go deleted file mode 100644 index e6762d084..000000000 --- a/vendor/google.golang.org/grpc/codes/code_string.go +++ /dev/null @@ -1,16 +0,0 @@ -// generated by stringer -type=Code; DO NOT EDIT - -package codes - -import "fmt" - -const _Code_name = "OKCanceledUnknownInvalidArgumentDeadlineExceededNotFoundAlreadyExistsPermissionDeniedResourceExhaustedFailedPreconditionAbortedOutOfRangeUnimplementedInternalUnavailableDataLossUnauthenticated" - -var _Code_index = [...]uint8{0, 2, 10, 17, 32, 48, 56, 69, 85, 102, 120, 127, 137, 150, 158, 169, 177, 192} - -func (i Code) String() string { - if i+1 >= Code(len(_Code_index)) { - return fmt.Sprintf("Code(%d)", i) - } - return _Code_name[_Code_index[i]:_Code_index[i+1]] -} diff --git a/vendor/google.golang.org/grpc/codes/codes.go b/vendor/google.golang.org/grpc/codes/codes.go deleted file mode 100644 index e14b464ac..000000000 --- a/vendor/google.golang.org/grpc/codes/codes.go +++ /dev/null @@ -1,159 +0,0 @@ -/* - * - * Copyright 2014, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -// Package codes defines the canonical error codes used by gRPC. It is -// consistent across various languages. -package codes // import "google.golang.org/grpc/codes" - -// A Code is an unsigned 32-bit error code as defined in the gRPC spec. -type Code uint32 - -//go:generate stringer -type=Code - -const ( - // OK is returned on success. - OK Code = 0 - - // Canceled indicates the operation was cancelled (typically by the caller). - Canceled Code = 1 - - // Unknown error. An example of where this error may be returned is - // if a Status value received from another address space belongs to - // 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. - 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). - InvalidArgument Code = 3 - - // DeadlineExceeded means operation expired before completion. - // For operations that change the state of the system, this error may be - // 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. - DeadlineExceeded Code = 4 - - // NotFound means some requested entity (e.g., file or directory) was - // not found. - NotFound Code = 5 - - // AlreadyExists means an attempt to create an entity failed because one - // already exists. - AlreadyExists Code = 6 - - // PermissionDenied indicates the caller does not have permission to - // execute the specified operation. It must not be used for rejections - // caused by exhausting some resource (use ResourceExhausted - // instead for those errors). It must not be - // used if the caller cannot be identified (use Unauthenticated - // instead for those errors). - PermissionDenied Code = 7 - - // Unauthenticated indicates the request does not have valid - // authentication credentials for the operation. - Unauthenticated Code = 16 - - // ResourceExhausted indicates some resource has been exhausted, perhaps - // a per-user quota, or perhaps the entire file system is out of space. - ResourceExhausted Code = 8 - - // FailedPrecondition indicates operation was rejected because the - // system is not in a state required for the operation's execution. - // For example, directory to be deleted may be non-empty, an rmdir - // operation is applied to a non-directory, etc. - // - // A litmus test that may help a service implementor in deciding - // between FailedPrecondition, Aborted, and Unavailable: - // (a) Use Unavailable if the client can retry just the failing call. - // (b) Use Aborted if the client should retry at a higher-level - // (e.g., restarting a read-modify-write sequence). - // (c) Use FailedPrecondition if the client should not retry until - // the system state has been explicitly fixed. E.g., if an "rmdir" - // fails because the directory is non-empty, FailedPrecondition - // should be returned since the client should not retry unless - // they have first fixed up the directory by deleting files from it. - // (d) Use FailedPrecondition if the client performs conditional - // 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. - FailedPrecondition Code = 9 - - // Aborted indicates the operation was aborted, typically due to a - // concurrency issue like sequencer check failures, transaction aborts, - // etc. - // - // See litmus test above for deciding between FailedPrecondition, - // Aborted, and Unavailable. - Aborted Code = 10 - - // OutOfRange means operation was attempted past the valid range. - // E.g., seeking or reading past end of file. - // - // Unlike InvalidArgument, this error indicates a problem that may - // be fixed if the system state changes. For example, a 32-bit file - // system will generate InvalidArgument if asked to read at an - // offset that is not in the range [0,2^32-1], but it will generate - // OutOfRange if asked to read from an offset past the current - // file size. - // - // There is a fair bit of overlap between FailedPrecondition and - // OutOfRange. We recommend using OutOfRange (the more specific - // 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. - OutOfRange Code = 11 - - // Unimplemented indicates operation is not implemented or not - // supported/enabled in this service. - 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. - Internal Code = 13 - - // Unavailable indicates the service is currently unavailable. - // This is a most likely a transient condition and may be corrected - // by retrying with a backoff. - // - // See litmus test above for deciding between FailedPrecondition, - // Aborted, and Unavailable. - Unavailable Code = 14 - - // DataLoss indicates unrecoverable data loss or corruption. - DataLoss Code = 15 -) diff --git a/vendor/google.golang.org/grpc/credentials/credentials.go b/vendor/google.golang.org/grpc/credentials/credentials.go deleted file mode 100644 index 5555ef024..000000000 --- a/vendor/google.golang.org/grpc/credentials/credentials.go +++ /dev/null @@ -1,232 +0,0 @@ -/* - * - * Copyright 2014, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -// 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 ( - "crypto/tls" - "crypto/x509" - "errors" - "fmt" - "io/ioutil" - "net" - "strings" - - "golang.org/x/net/context" -) - -var ( - // alpnProtoStr are the specified application level protocols for gRPC. - alpnProtoStr = []string{"h2"} -) - -// 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. 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. - // 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 -} - -// 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. - 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. -type AuthInfo interface { - AuthType() string -} - -var ( - // ErrConnDispatched indicates that rawConn has been dispatched out of gRPC - // and the caller should not close rawConn. - 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. - // Implementations must use the provided context to implement timely cancellation. - 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. - 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 -} - -// TLSInfo contains the auth information for a TLS authenticated connection. -// It implements the AuthInfo interface. -type TLSInfo struct { - State tls.ConnectionState -} - -// AuthType returns the type of TLSInfo as a string. -func (t TLSInfo) AuthType() string { - return "tls" -} - -// 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, addr string, rawConn net.Conn) (_ net.Conn, _ AuthInfo, err error) { - // use local cfg to avoid clobbering ServerName if using multiple endpoints - cfg := cloneTLSConfig(c.config) - if cfg.ServerName == "" { - colonPos := strings.LastIndex(addr, ":") - if colonPos == -1 { - colonPos = len(addr) - } - cfg.ServerName = addr[:colonPos] - } - conn := tls.Client(rawConn, cfg) - errChannel := make(chan error, 1) - go func() { - errChannel <- conn.Handshake() - }() - select { - case err := <-errChannel: - if err != nil { - return nil, nil, err - } - case <-ctx.Done(): - return nil, nil, ctx.Err() - } - // TODO(zhaoq): Omit the auth info for client now. It is more for - // information than anything else. - return conn, nil, nil -} - -func (c *tlsCreds) ServerHandshake(rawConn net.Conn) (net.Conn, AuthInfo, error) { - conn := tls.Server(rawConn, c.config) - if err := conn.Handshake(); err != nil { - return nil, nil, err - } - return conn, TLSInfo{conn.ConnectionState()}, 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{cloneTLSConfig(c)} - tc.config.NextProtos = alpnProtoStr - return tc -} - -// NewClientTLSFromCert constructs a TLS from the input certificate for client. -// 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 a TLS from the input certificate file for client. -// 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 a TLS from the input certificate for server. -func NewServerTLSFromCert(cert *tls.Certificate) TransportCredentials { - return NewTLS(&tls.Config{Certificates: []tls.Certificate{*cert}}) -} - -// NewServerTLSFromFile constructs a TLS 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 -} diff --git a/vendor/google.golang.org/grpc/credentials/credentials_util_go17.go b/vendor/google.golang.org/grpc/credentials/credentials_util_go17.go deleted file mode 100644 index 9647b9ec8..000000000 --- a/vendor/google.golang.org/grpc/credentials/credentials_util_go17.go +++ /dev/null @@ -1,76 +0,0 @@ -// +build go1.7 - -/* - * - * Copyright 2016, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -package credentials - -import ( - "crypto/tls" -) - -// 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 replace this function with official clone function. -func cloneTLSConfig(cfg *tls.Config) *tls.Config { - if cfg == nil { - return &tls.Config{} - } - return &tls.Config{ - Rand: cfg.Rand, - Time: cfg.Time, - Certificates: cfg.Certificates, - NameToCertificate: cfg.NameToCertificate, - GetCertificate: cfg.GetCertificate, - RootCAs: cfg.RootCAs, - NextProtos: cfg.NextProtos, - ServerName: cfg.ServerName, - ClientAuth: cfg.ClientAuth, - ClientCAs: cfg.ClientCAs, - InsecureSkipVerify: cfg.InsecureSkipVerify, - CipherSuites: cfg.CipherSuites, - PreferServerCipherSuites: cfg.PreferServerCipherSuites, - SessionTicketsDisabled: cfg.SessionTicketsDisabled, - SessionTicketKey: cfg.SessionTicketKey, - ClientSessionCache: cfg.ClientSessionCache, - MinVersion: cfg.MinVersion, - MaxVersion: cfg.MaxVersion, - CurvePreferences: cfg.CurvePreferences, - DynamicRecordSizingDisabled: cfg.DynamicRecordSizingDisabled, - Renegotiation: cfg.Renegotiation, - } -} diff --git a/vendor/google.golang.org/grpc/credentials/credentials_util_pre_go17.go b/vendor/google.golang.org/grpc/credentials/credentials_util_pre_go17.go deleted file mode 100644 index 09b8d12c7..000000000 --- a/vendor/google.golang.org/grpc/credentials/credentials_util_pre_go17.go +++ /dev/null @@ -1,74 +0,0 @@ -// +build !go1.7 - -/* - * - * Copyright 2016, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -package credentials - -import ( - "crypto/tls" -) - -// 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 replace this function with official clone function. -func cloneTLSConfig(cfg *tls.Config) *tls.Config { - if cfg == nil { - return &tls.Config{} - } - return &tls.Config{ - Rand: cfg.Rand, - Time: cfg.Time, - Certificates: cfg.Certificates, - NameToCertificate: cfg.NameToCertificate, - GetCertificate: cfg.GetCertificate, - RootCAs: cfg.RootCAs, - NextProtos: cfg.NextProtos, - ServerName: cfg.ServerName, - ClientAuth: cfg.ClientAuth, - ClientCAs: cfg.ClientCAs, - InsecureSkipVerify: cfg.InsecureSkipVerify, - CipherSuites: cfg.CipherSuites, - PreferServerCipherSuites: cfg.PreferServerCipherSuites, - SessionTicketsDisabled: cfg.SessionTicketsDisabled, - SessionTicketKey: cfg.SessionTicketKey, - ClientSessionCache: cfg.ClientSessionCache, - MinVersion: cfg.MinVersion, - MaxVersion: cfg.MaxVersion, - CurvePreferences: cfg.CurvePreferences, - } -} diff --git a/vendor/google.golang.org/grpc/doc.go b/vendor/google.golang.org/grpc/doc.go deleted file mode 100644 index a35f21885..000000000 --- a/vendor/google.golang.org/grpc/doc.go +++ /dev/null @@ -1,6 +0,0 @@ -/* -Package grpc implements an RPC system called gRPC. - -See www.grpc.io for more information about gRPC. -*/ -package grpc // import "google.golang.org/grpc" diff --git a/vendor/google.golang.org/grpc/grpclog/logger.go b/vendor/google.golang.org/grpc/grpclog/logger.go deleted file mode 100644 index 3b2933079..000000000 --- a/vendor/google.golang.org/grpc/grpclog/logger.go +++ /dev/null @@ -1,93 +0,0 @@ -/* - * - * Copyright 2015, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -/* -Package grpclog defines logging for grpc. -*/ -package grpclog // import "google.golang.org/grpc/grpclog" - -import ( - "log" - "os" -) - -// Use golang's standard logger by default. -// Access is not mutex-protected: do not modify except in init() -// functions. -var logger Logger = log.New(os.Stderr, "", log.LstdFlags) - -// Logger mimics golang's standard Logger as an interface. -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. -func SetLogger(l Logger) { - logger = l -} - -// Fatal is equivalent to Print() followed by a call to os.Exit() with a non-zero exit code. -func Fatal(args ...interface{}) { - logger.Fatal(args...) -} - -// Fatalf is equivalent to Printf() followed by a call to os.Exit() with a non-zero exit code. -func Fatalf(format string, args ...interface{}) { - logger.Fatalf(format, args...) -} - -// Fatalln is equivalent to Println() followed by a call to os.Exit()) with a non-zero exit code. -func Fatalln(args ...interface{}) { - logger.Fatalln(args...) -} - -// Print prints to the logger. Arguments are handled in the manner of fmt.Print. -func Print(args ...interface{}) { - logger.Print(args...) -} - -// Printf prints to the logger. Arguments are handled in the manner of fmt.Printf. -func Printf(format string, args ...interface{}) { - logger.Printf(format, args...) -} - -// Println prints to the logger. Arguments are handled in the manner of fmt.Println. -func Println(args ...interface{}) { - logger.Println(args...) -} diff --git a/vendor/google.golang.org/grpc/interceptor.go b/vendor/google.golang.org/grpc/interceptor.go deleted file mode 100644 index 8d932efed..000000000 --- a/vendor/google.golang.org/grpc/interceptor.go +++ /dev/null @@ -1,90 +0,0 @@ -/* - * - * Copyright 2016, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -package grpc - -import ( - "golang.org/x/net/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. inovker is the handler to complete the RPC -// and it is the responsibility of the interceptor to call it. -// This is the EXPERIMENTAL API. -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 handlder to create a ClientStream and it is the responsibility of the interceptor to call it. -// This is the EXPERIMENTAL API. -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. -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/internal.go b/vendor/google.golang.org/grpc/internal/internal.go deleted file mode 100644 index 5489143a8..000000000 --- a/vendor/google.golang.org/grpc/internal/internal.go +++ /dev/null @@ -1,49 +0,0 @@ -/* - * Copyright 2016, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -// Package internal contains gRPC-internal code for testing, to avoid polluting -// the godoc of the top-level grpc package. -package internal - -// TestingCloseConns closes all existing transports but keeps -// grpcServer.lis accepting new connections. -// -// The provided grpcServer must be of type *grpc.Server. It is untyped -// for circular dependency reasons. -var TestingCloseConns func(grpcServer interface{}) - -// TestingUseHandlerImpl enables the http.Handler-based server implementation. -// It must be called before Serve and requires TLS credentials. -// -// The provided grpcServer must be of type *grpc.Server. It is untyped -// for circular dependency reasons. -var TestingUseHandlerImpl func(grpcServer interface{}) diff --git a/vendor/google.golang.org/grpc/metadata/metadata.go b/vendor/google.golang.org/grpc/metadata/metadata.go deleted file mode 100644 index 3c0ca7a36..000000000 --- a/vendor/google.golang.org/grpc/metadata/metadata.go +++ /dev/null @@ -1,147 +0,0 @@ -/* - * - * Copyright 2014, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -// Package metadata define the structure of the metadata supported by gRPC library. -package metadata // import "google.golang.org/grpc/metadata" - -import ( - "encoding/base64" - "fmt" - "strings" - - "golang.org/x/net/context" -) - -const ( - binHdrSuffix = "-bin" -) - -// encodeKeyValue encodes key and value qualified for transmission via gRPC. -// Transmitting binary headers violates HTTP/2 spec. -// TODO(zhaoq): Maybe check if k is ASCII also. -func encodeKeyValue(k, v string) (string, string) { - k = strings.ToLower(k) - if strings.HasSuffix(k, binHdrSuffix) { - val := base64.StdEncoding.EncodeToString([]byte(v)) - v = string(val) - } - return k, v -} - -// DecodeKeyValue returns the original key and value corresponding to the -// encoded data in k, v. -// If k is a binary header and v contains comma, v is split on comma before decoded, -// and the decoded v will be joined with comma before returned. -func DecodeKeyValue(k, v string) (string, string, error) { - if !strings.HasSuffix(k, binHdrSuffix) { - return k, v, nil - } - vvs := strings.Split(v, ",") - for i, vv := range vvs { - val, err := base64.StdEncoding.DecodeString(vv) - if err != nil { - return "", "", err - } - vvs[i] = string(val) - } - return k, strings.Join(vvs, ","), 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 a MD from given key-value map. -func New(m map[string]string) MD { - md := MD{} - for k, v := range m { - key, val := encodeKeyValue(k, v) - 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. -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 k string - for i, s := range kv { - if i%2 == 0 { - k = s - continue - } - key, val := encodeKeyValue(k, s) - md[key] = append(md[key], val) - } - 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) -} - -// 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 mdKey struct{} - -// NewContext creates a new context with md attached. -func NewContext(ctx context.Context, md MD) context.Context { - return context.WithValue(ctx, mdKey{}, md) -} - -// FromContext returns the MD in ctx if it exists. -func FromContext(ctx context.Context) (md MD, ok bool) { - md, ok = ctx.Value(mdKey{}).(MD) - return -} diff --git a/vendor/google.golang.org/grpc/naming/naming.go b/vendor/google.golang.org/grpc/naming/naming.go deleted file mode 100644 index c2e0871e6..000000000 --- a/vendor/google.golang.org/grpc/naming/naming.go +++ /dev/null @@ -1,74 +0,0 @@ -/* - * - * Copyright 2014, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -// Package naming defines the naming API and related data structures for gRPC. -// The interface is EXPERIMENTAL and may be suject to change. -package naming - -// Operation defines the corresponding operations for a name resolution change. -type Operation uint8 - -const ( - // Add indicates a new address is added. - Add Operation = iota - // Delete indicates an exisiting address is deleted. - Delete -) - -// Update defines a name resolution update. Notice that it is not valid having both -// empty string Addr and nil Metadata in an Update. -type Update struct { - // Op indicates the operation of the update. - Op Operation - // Addr is the updated address. It is empty string if there is no address update. - Addr string - // Metadata is the updated metadata. It is nil if there is no metadata update. - // Metadata is not required for a custom naming implementation. - Metadata interface{} -} - -// Resolver creates a Watcher for a target to track its resolution changes. -type Resolver interface { - // Resolve creates a Watcher for target. - Resolve(target string) (Watcher, error) -} - -// Watcher watches for the updates on the specified target. -type Watcher interface { - // Next blocks until an update or error happens. It may return one or more - // updates. The first call should get the full set of the results. It should - // return an error if and only if Watcher cannot recover. - Next() ([]*Update, error) - // Close closes the Watcher. - Close() -} diff --git a/vendor/google.golang.org/grpc/peer/peer.go b/vendor/google.golang.org/grpc/peer/peer.go deleted file mode 100644 index bfa6205ba..000000000 --- a/vendor/google.golang.org/grpc/peer/peer.go +++ /dev/null @@ -1,65 +0,0 @@ -/* - * - * Copyright 2014, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -// Package peer defines various peer information associated with RPCs and -// corresponding utils. -package peer - -import ( - "net" - - "golang.org/x/net/context" - "google.golang.org/grpc/credentials" -) - -// Peer contains the information of the peer for an RPC. -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/rpc_util.go b/vendor/google.golang.org/grpc/rpc_util.go deleted file mode 100644 index a25eaa8a2..000000000 --- a/vendor/google.golang.org/grpc/rpc_util.go +++ /dev/null @@ -1,457 +0,0 @@ -/* - * - * Copyright 2014, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -package grpc - -import ( - "bytes" - "compress/gzip" - "encoding/binary" - "fmt" - "io" - "io/ioutil" - "math" - "os" - - "github.com/golang/protobuf/proto" - "golang.org/x/net/context" - "google.golang.org/grpc/codes" - "google.golang.org/grpc/metadata" - "google.golang.org/grpc/transport" -) - -// Codec defines the interface gRPC uses to encode and decode messages. -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. The returned - // string will be used as part of content type in transmission. - String() string -} - -// protoCodec is a Codec implementation with protobuf. It is the default codec for gRPC. -type protoCodec struct{} - -func (protoCodec) Marshal(v interface{}) ([]byte, error) { - return proto.Marshal(v.(proto.Message)) -} - -func (protoCodec) Unmarshal(data []byte, v interface{}) error { - return proto.Unmarshal(data, v.(proto.Message)) -} - -func (protoCodec) String() string { - return "proto" -} - -// Compressor defines the interface gRPC uses to compress a message. -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 -} - -// NewGZIPCompressor creates a Compressor based on GZIP. -func NewGZIPCompressor() Compressor { - return &gzipCompressor{} -} - -type gzipCompressor struct { -} - -func (c *gzipCompressor) Do(w io.Writer, p []byte) error { - z := gzip.NewWriter(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. -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 { -} - -// NewGZIPDecompressor creates a Decompressor based on GZIP. -func NewGZIPDecompressor() Decompressor { - return &gzipDecompressor{} -} - -func (d *gzipDecompressor) Do(r io.Reader) ([]byte, error) { - z, err := gzip.NewReader(r) - if err != nil { - return nil, err - } - defer z.Close() - return ioutil.ReadAll(z) -} - -func (d *gzipDecompressor) Type() string { - return "gzip" -} - -// callInfo contains all related configuration and information about an RPC. -type callInfo struct { - failFast bool - headerMD metadata.MD - trailerMD metadata.MD - traceInfo traceInfo // in trace.go -} - -var defaultCallInfo = callInfo{failFast: true} - -// 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) -} - -type beforeCall func(c *callInfo) error - -func (o beforeCall) before(c *callInfo) error { return o(c) } -func (o beforeCall) after(c *callInfo) {} - -type afterCall func(c *callInfo) - -func (o afterCall) before(c *callInfo) error { return nil } -func (o afterCall) after(c *callInfo) { o(c) } - -// Header returns a CallOptions that retrieves the header metadata -// for a unary RPC. -func Header(md *metadata.MD) CallOption { - return afterCall(func(c *callInfo) { - *md = c.headerMD - }) -} - -// Trailer returns a CallOptions that retrieves the trailer metadata -// for a unary RPC. -func Trailer(md *metadata.MD) CallOption { - return afterCall(func(c *callInfo) { - *md = c.trailerMD - }) -} - -// FailFast configures the action to take when an RPC is attempted on broken -// connections or unreachable servers. If failfast is true, 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. Please refer to -// https://github.com/grpc/grpc/blob/master/doc/fail_fast.md -func FailFast(failFast bool) CallOption { - return beforeCall(func(c *callInfo) error { - c.failFast = failFast - return nil - }) -} - -// The format of the payload: compressed or not? -type payloadFormat uint8 - -const ( - compressionNone payloadFormat = iota // no compression - compressionMade -) - -// 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 http://www.grpc.io/docs/guides/wire.html. - 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 -// * of type transport.StreamError -// 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(maxMsgSize int) (pf payloadFormat, msg []byte, err error) { - if _, err := io.ReadFull(p.r, 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 length > uint32(maxMsgSize) { - return 0, nil, Errorf(codes.Internal, "grpc: received message length %d exceeding the max size %d", length, maxMsgSize) - } - // TODO(bradfitz,zhaoq): garbage. reuse buffer after proto decoding instead - // of making it for each message: - msg = make([]byte, int(length)) - if _, err := io.ReadFull(p.r, msg); err != nil { - if err == io.EOF { - err = io.ErrUnexpectedEOF - } - return 0, nil, err - } - return pf, msg, nil -} - -// encode serializes msg and prepends the message header. If msg is nil, it -// generates the message header of 0 message length. -func encode(c Codec, msg interface{}, cp Compressor, cbuf *bytes.Buffer) ([]byte, error) { - var b []byte - var length uint - if msg != nil { - var err error - // TODO(zhaoq): optimize to reduce memory alloc and copying. - b, err = c.Marshal(msg) - if err != nil { - return nil, err - } - if cp != nil { - if err := cp.Do(cbuf, b); err != nil { - return nil, err - } - b = cbuf.Bytes() - } - length = uint(len(b)) - } - if length > math.MaxUint32 { - return nil, Errorf(codes.InvalidArgument, "grpc: message too large (%d bytes)", length) - } - - const ( - payloadLen = 1 - sizeLen = 4 - ) - - var buf = make([]byte, payloadLen+sizeLen+len(b)) - - // Write payload format - if cp == nil { - buf[0] = byte(compressionNone) - } else { - buf[0] = byte(compressionMade) - } - // Write length of b into buf - binary.BigEndian.PutUint32(buf[1:], uint32(length)) - // Copy encoded msg to buf - copy(buf[5:], b) - - return buf, nil -} - -func checkRecvPayload(pf payloadFormat, recvCompress string, dc Decompressor) error { - switch pf { - case compressionNone: - case compressionMade: - if dc == nil || recvCompress != dc.Type() { - return Errorf(codes.Unimplemented, "grpc: Decompressor is not installed for grpc-encoding %q", recvCompress) - } - default: - return Errorf(codes.Internal, "grpc: received unexpected payload format %d", pf) - } - return nil -} - -func recv(p *parser, c Codec, s *transport.Stream, dc Decompressor, m interface{}, maxMsgSize int) error { - pf, d, err := p.recvMsg(maxMsgSize) - if err != nil { - return err - } - if err := checkRecvPayload(pf, s.RecvCompress(), dc); err != nil { - return err - } - if pf == compressionMade { - d, err = dc.Do(bytes.NewReader(d)) - if err != nil { - return Errorf(codes.Internal, "grpc: failed to decompress the received message %v", err) - } - } - if len(d) > maxMsgSize { - // TODO: Revisit the error code. Currently keep it consistent with java - // implementation. - return Errorf(codes.Internal, "grpc: received a message of %d bytes exceeding %d limit", len(d), maxMsgSize) - } - if err := c.Unmarshal(d, m); err != nil { - return Errorf(codes.Internal, "grpc: failed to unmarshal the received message %v", err) - } - return nil -} - -// rpcError defines the status from an RPC. -type rpcError struct { - code codes.Code - desc string -} - -func (e *rpcError) Error() string { - return fmt.Sprintf("rpc error: code = %d desc = %s", e.code, e.desc) -} - -// Code returns the error code for err if it was produced by the rpc system. -// Otherwise, it returns codes.Unknown. -func Code(err error) codes.Code { - if err == nil { - return codes.OK - } - if e, ok := err.(*rpcError); ok { - return e.code - } - return codes.Unknown -} - -// 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. -func ErrorDesc(err error) string { - if err == nil { - return "" - } - if e, ok := err.(*rpcError); ok { - return e.desc - } - return err.Error() -} - -// Errorf returns an error containing an error code and a description; -// Errorf returns nil if c is OK. -func Errorf(c codes.Code, format string, a ...interface{}) error { - if c == codes.OK { - return nil - } - return &rpcError{ - code: c, - desc: fmt.Sprintf(format, a...), - } -} - -// toRPCErr converts an error into a rpcError. -func toRPCErr(err error) error { - switch e := err.(type) { - case *rpcError: - return err - case transport.StreamError: - return &rpcError{ - code: e.Code, - desc: e.Desc, - } - case transport.ConnectionError: - return &rpcError{ - code: codes.Internal, - desc: e.Desc, - } - default: - switch err { - case context.DeadlineExceeded: - return &rpcError{ - code: codes.DeadlineExceeded, - desc: err.Error(), - } - case context.Canceled: - return &rpcError{ - code: codes.Canceled, - desc: err.Error(), - } - case ErrClientConnClosing: - return &rpcError{ - code: codes.FailedPrecondition, - desc: err.Error(), - } - } - - } - return Errorf(codes.Unknown, "%v", err) -} - -// convertCode converts a standard Go error into its canonical code. Note that -// this is only used to translate the error returned by the server applications. -func convertCode(err error) codes.Code { - switch err { - case nil: - return codes.OK - case io.EOF: - return codes.OutOfRange - case io.ErrClosedPipe, io.ErrNoProgress, io.ErrShortBuffer, io.ErrShortWrite, io.ErrUnexpectedEOF: - return codes.FailedPrecondition - case os.ErrInvalid: - return codes.InvalidArgument - case context.Canceled: - return codes.Canceled - case context.DeadlineExceeded: - return codes.DeadlineExceeded - } - switch { - case os.IsExist(err): - return codes.AlreadyExists - case os.IsNotExist(err): - return codes.NotFound - case os.IsPermission(err): - return codes.PermissionDenied - } - return codes.Unknown -} - -// SupportPackageIsVersion4 is referenced from generated protocol buffer files -// to assert that that code is compatible with this version of the grpc package. -// -// This constant may be renamed in the future if a change in the generated code -// requires a synchronised update of grpc-go and protoc-gen-go. This constant -// should not be referenced from any other code. -const SupportPackageIsVersion4 = true diff --git a/vendor/google.golang.org/grpc/server.go b/vendor/google.golang.org/grpc/server.go deleted file mode 100644 index e0bb187ef..000000000 --- a/vendor/google.golang.org/grpc/server.go +++ /dev/null @@ -1,944 +0,0 @@ -/* - * - * Copyright 2014, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -package grpc - -import ( - "bytes" - "errors" - "fmt" - "io" - "net" - "net/http" - "reflect" - "runtime" - "strings" - "sync" - "time" - - "golang.org/x/net/context" - "golang.org/x/net/http2" - "golang.org/x/net/trace" - "google.golang.org/grpc/codes" - "google.golang.org/grpc/credentials" - "google.golang.org/grpc/grpclog" - "google.golang.org/grpc/internal" - "google.golang.org/grpc/metadata" - "google.golang.org/grpc/transport" -) - -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{} -} - -// service consists of the information of the server serving this service and -// the methods in this service. -type service struct { - server interface{} // the server for service methods - md map[string]*MethodDesc - sd map[string]*StreamDesc - mdata interface{} -} - -// Server is a gRPC server to serve RPC requests. -type Server struct { - opts options - - mu sync.Mutex // guards following - lis map[net.Listener]bool - conns map[io.Closer]bool - drain bool - ctx context.Context - cancel context.CancelFunc - // A CondVar to let GracefulStop() blocks until all the pending RPCs are finished - // and all the transport goes away. - cv *sync.Cond - m map[string]*service // service name -> service info - events trace.EventLog -} - -type options struct { - creds credentials.TransportCredentials - codec Codec - cp Compressor - dc Decompressor - maxMsgSize int - unaryInt UnaryServerInterceptor - streamInt StreamServerInterceptor - maxConcurrentStreams uint32 - useHandlerImpl bool // use http.Handler-based server -} - -var defaultMaxMsgSize = 1024 * 1024 * 4 // use 4MB as the default message size limit - -// A ServerOption sets options. -type ServerOption func(*options) - -// CustomCodec returns a ServerOption that sets a codec for message marshaling and unmarshaling. -func CustomCodec(codec Codec) ServerOption { - return func(o *options) { - o.codec = codec - } -} - -// RPCCompressor returns a ServerOption that sets a compressor for outbound messages. -func RPCCompressor(cp Compressor) ServerOption { - return func(o *options) { - o.cp = cp - } -} - -// RPCDecompressor returns a ServerOption that sets a decompressor for inbound messages. -func RPCDecompressor(dc Decompressor) ServerOption { - return func(o *options) { - o.dc = dc - } -} - -// MaxMsgSize returns a ServerOption to set the max message size in bytes for inbound mesages. -// If this is not set, gRPC uses the default 4MB. -func MaxMsgSize(m int) ServerOption { - return func(o *options) { - o.maxMsgSize = 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 func(o *options) { - o.maxConcurrentStreams = n - } -} - -// Creds returns a ServerOption that sets credentials for server connections. -func Creds(c credentials.TransportCredentials) ServerOption { - return func(o *options) { - 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 func(o *options) { - if o.unaryInt != nil { - panic("The unary server interceptor has been set.") - } - o.unaryInt = i - } -} - -// StreamInterceptor returns a ServerOption that sets the StreamServerInterceptor for the -// server. Only one stream interceptor can be installed. -func StreamInterceptor(i StreamServerInterceptor) ServerOption { - return func(o *options) { - if o.streamInt != nil { - panic("The stream server interceptor has been set.") - } - o.streamInt = i - } -} - -// NewServer creates a gRPC server which has no service registered and has not -// started to accept requests yet. -func NewServer(opt ...ServerOption) *Server { - var opts options - opts.maxMsgSize = defaultMaxMsgSize - for _, o := range opt { - o(&opts) - } - if opts.codec == nil { - // Set the default codec. - opts.codec = protoCodec{} - } - s := &Server{ - lis: make(map[net.Listener]bool), - opts: opts, - conns: make(map[io.Closer]bool), - m: make(map[string]*service), - } - s.cv = sync.NewCond(&s.mu) - s.ctx, s.cancel = context.WithCancel(context.Background()) - if EnableTracing { - _, file, line, _ := runtime.Caller(1) - s.events = trace.NewEventLog("grpc.Server", fmt.Sprintf("%s:%d", file, line)) - } - 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...) - } -} - -// RegisterService register a service and its implementation to the gRPC -// server. Called from the IDL generated code. This must be called before -// invoking Serve. -func (s *Server) RegisterService(sd *ServiceDesc, ss interface{}) { - ht := reflect.TypeOf(sd.HandlerType).Elem() - st := reflect.TypeOf(ss) - if !st.Implements(ht) { - grpclog.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 _, ok := s.m[sd.ServiceName]; ok { - grpclog.Fatalf("grpc: Server.RegisterService found duplicate service registration for %q", sd.ServiceName) - } - srv := &service{ - server: ss, - md: make(map[string]*MethodDesc), - sd: make(map[string]*StreamDesc), - mdata: sd.Metadata, - } - for i := range sd.Methods { - d := &sd.Methods[i] - srv.md[d.MethodName] = d - } - for i := range sd.Streams { - d := &sd.Streams[i] - srv.sd[d.StreamName] = d - } - s.m[sd.ServiceName] = srv -} - -// 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 methid 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 <package>.<service>. -func (s *Server) GetServiceInfo() map[string]ServiceInfo { - ret := make(map[string]ServiceInfo) - for n, srv := range s.m { - methods := make([]MethodInfo, 0, len(srv.md)+len(srv.sd)) - for m := range srv.md { - methods = append(methods, MethodInfo{ - Name: m, - IsClientStream: false, - IsServerStream: false, - }) - } - for m, d := range srv.sd { - methods = append(methods, MethodInfo{ - Name: m, - IsClientStream: d.ClientStreams, - IsServerStream: d.ServerStreams, - }) - } - - ret[n] = ServiceInfo{ - Methods: methods, - Metadata: srv.mdata, - } - } - return ret -} - -var ( - // ErrServerStopped indicates that the operation is now illegal because of - // the server being stopped. - 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) -} - -// 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. -func (s *Server) Serve(lis net.Listener) error { - s.mu.Lock() - s.printf("serving") - if s.lis == nil { - s.mu.Unlock() - lis.Close() - return ErrServerStopped - } - s.lis[lis] = true - s.mu.Unlock() - defer func() { - s.mu.Lock() - if s.lis != nil && s.lis[lis] { - lis.Close() - delete(s.lis, lis) - } - 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() - select { - case <-time.After(tempDelay): - case <-s.ctx.Done(): - } - continue - } - s.mu.Lock() - s.printf("done serving; Accept = %v", err) - s.mu.Unlock() - return err - } - tempDelay = 0 - // Start a new goroutine to deal with rawConn - // so we don't stall this Accept loop goroutine. - go s.handleRawConn(rawConn) - } -} - -// handleRawConn is run in its own goroutine and handles a just-accepted -// connection that has not had any I/O performed on it yet. -func (s *Server) handleRawConn(rawConn net.Conn) { - conn, authInfo, err := s.useTransportAuthenticator(rawConn) - if err != nil { - s.mu.Lock() - s.errorf("ServerHandshake(%q) failed: %v", rawConn.RemoteAddr(), err) - s.mu.Unlock() - grpclog.Printf("grpc: Server.Serve failed to complete security handshake from %q: %v", rawConn.RemoteAddr(), err) - // If serverHandShake returns ErrConnDispatched, keep rawConn open. - if err != credentials.ErrConnDispatched { - rawConn.Close() - } - return - } - - s.mu.Lock() - if s.conns == nil { - s.mu.Unlock() - conn.Close() - return - } - s.mu.Unlock() - - if s.opts.useHandlerImpl { - s.serveUsingHandler(conn) - } else { - s.serveNewHTTP2Transport(conn, authInfo) - } -} - -// serveNewHTTP2Transport sets up a new http/2 transport (using the -// gRPC http2 server transport in transport/http2_server.go) and -// serves streams on it. -// This is run in its own goroutine (it does network I/O in -// transport.NewServerTransport). -func (s *Server) serveNewHTTP2Transport(c net.Conn, authInfo credentials.AuthInfo) { - st, err := transport.NewServerTransport("http2", c, s.opts.maxConcurrentStreams, authInfo) - if err != nil { - s.mu.Lock() - s.errorf("NewServerTransport(%q) failed: %v", c.RemoteAddr(), err) - s.mu.Unlock() - c.Close() - grpclog.Println("grpc: Server.Serve failed to create ServerTransport: ", err) - return - } - if !s.addConn(st) { - st.Close() - return - } - s.serveStreams(st) -} - -func (s *Server) serveStreams(st transport.ServerTransport) { - defer s.removeConn(st) - defer st.Close() - var wg sync.WaitGroup - st.HandleStreams(func(stream *transport.Stream) { - wg.Add(1) - go func() { - defer wg.Done() - s.handleStream(st, stream, s.traceInfo(st, stream)) - }() - }) - wg.Wait() -} - -var _ http.Handler = (*Server)(nil) - -// serveUsingHandler is called from handleRawConn when s is configured -// to handle requests via the http.Handler interface. It sets up a -// net/http.Server to handle the just-accepted conn. The http.Server -// is configured to route all incoming requests (all HTTP/2 streams) -// to ServeHTTP, which creates a new ServerTransport for each stream. -// serveUsingHandler blocks until conn closes. -// -// This codepath is only used when Server.TestingUseHandlerImpl has -// been configured. This lets the end2end tests exercise the ServeHTTP -// method as one of the environment types. -// -// conn is the *tls.Conn that's already been authenticated. -func (s *Server) serveUsingHandler(conn net.Conn) { - if !s.addConn(conn) { - conn.Close() - return - } - defer s.removeConn(conn) - h2s := &http2.Server{ - MaxConcurrentStreams: s.opts.maxConcurrentStreams, - } - h2s.ServeConn(conn, &http2.ServeConnOpts{ - Handler: s, - }) -} - -func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) { - st, err := transport.NewServerHandlerTransport(w, r) - if err != nil { - http.Error(w, err.Error(), http.StatusInternalServerError) - return - } - if !s.addConn(st) { - st.Close() - 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 - } - trInfo = &traceInfo{ - tr: trace.New("grpc.Recv."+methodFamily(stream.Method()), stream.Method()), - } - trInfo.firstLine.client = false - trInfo.firstLine.remoteAddr = st.RemoteAddr() - stream.TraceContext(trInfo.tr) - if dl, ok := stream.Context().Deadline(); ok { - trInfo.firstLine.deadline = dl.Sub(time.Now()) - } - return trInfo -} - -func (s *Server) addConn(c io.Closer) bool { - s.mu.Lock() - defer s.mu.Unlock() - if s.conns == nil || s.drain { - return false - } - s.conns[c] = true - return true -} - -func (s *Server) removeConn(c io.Closer) { - s.mu.Lock() - defer s.mu.Unlock() - if s.conns != nil { - delete(s.conns, c) - s.cv.Broadcast() - } -} - -func (s *Server) sendResponse(t transport.ServerTransport, stream *transport.Stream, msg interface{}, cp Compressor, opts *transport.Options) error { - var cbuf *bytes.Buffer - if cp != nil { - cbuf = new(bytes.Buffer) - } - p, err := encode(s.opts.codec, msg, cp, cbuf) - if err != nil { - // This typically indicates a fatal issue (e.g., memory - // corruption or hardware faults) the application program - // cannot handle. - // - // TODO(zhaoq): There exist other options also such as only closing the - // faulty stream locally and remotely (Other streams can keep going). Find - // the optimal option. - grpclog.Fatalf("grpc: Server failed to encode response %v", err) - } - return t.Write(stream, p, opts) -} - -func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.Stream, srv *service, md *MethodDesc, trInfo *traceInfo) (err error) { - if trInfo != nil { - defer trInfo.tr.Finish() - trInfo.firstLine.client = false - trInfo.tr.LazyLog(&trInfo.firstLine, false) - defer func() { - if err != nil && err != io.EOF { - trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true) - trInfo.tr.SetError() - } - }() - } - if s.opts.cp != nil { - // NOTE: this needs to be ahead of all handling, https://github.com/grpc/grpc-go/issues/686. - stream.SetSendCompress(s.opts.cp.Type()) - } - p := &parser{r: stream} - for { - pf, req, err := p.recvMsg(s.opts.maxMsgSize) - if err == io.EOF { - // The entire stream is done (for unary RPC only). - return err - } - if err == io.ErrUnexpectedEOF { - err = Errorf(codes.Internal, io.ErrUnexpectedEOF.Error()) - } - if err != nil { - switch err := err.(type) { - case *rpcError: - if err := t.WriteStatus(stream, err.code, err.desc); err != nil { - grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", err) - } - case transport.ConnectionError: - // Nothing to do here. - case transport.StreamError: - if err := t.WriteStatus(stream, err.Code, err.Desc); err != nil { - grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", err) - } - default: - panic(fmt.Sprintf("grpc: Unexpected error (%T) from recvMsg: %v", err, err)) - } - return err - } - - if err := checkRecvPayload(pf, stream.RecvCompress(), s.opts.dc); err != nil { - switch err := err.(type) { - case *rpcError: - if err := t.WriteStatus(stream, err.code, err.desc); err != nil { - grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", err) - } - default: - if err := t.WriteStatus(stream, codes.Internal, err.Error()); err != nil { - grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", err) - } - - } - return err - } - statusCode := codes.OK - statusDesc := "" - df := func(v interface{}) error { - if pf == compressionMade { - var err error - req, err = s.opts.dc.Do(bytes.NewReader(req)) - if err != nil { - if err := t.WriteStatus(stream, codes.Internal, err.Error()); err != nil { - grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", err) - } - return err - } - } - if len(req) > s.opts.maxMsgSize { - // TODO: Revisit the error code. Currently keep it consistent with - // java implementation. - statusCode = codes.Internal - statusDesc = fmt.Sprintf("grpc: server received a message of %d bytes exceeding %d limit", len(req), s.opts.maxMsgSize) - } - if err := s.opts.codec.Unmarshal(req, v); err != nil { - return err - } - if trInfo != nil { - trInfo.tr.LazyLog(&payload{sent: false, msg: v}, true) - } - return nil - } - reply, appErr := md.Handler(srv.server, stream.Context(), df, s.opts.unaryInt) - if appErr != nil { - if err, ok := appErr.(*rpcError); ok { - statusCode = err.code - statusDesc = err.desc - } else { - statusCode = convertCode(appErr) - statusDesc = appErr.Error() - } - if trInfo != nil && statusCode != codes.OK { - trInfo.tr.LazyLog(stringer(statusDesc), true) - trInfo.tr.SetError() - } - if err := t.WriteStatus(stream, statusCode, statusDesc); err != nil { - grpclog.Printf("grpc: Server.processUnaryRPC failed to write status: %v", err) - return err - } - return nil - } - if trInfo != nil { - trInfo.tr.LazyLog(stringer("OK"), false) - } - opts := &transport.Options{ - Last: true, - Delay: false, - } - if err := s.sendResponse(t, stream, reply, s.opts.cp, opts); err != nil { - switch err := err.(type) { - case transport.ConnectionError: - // Nothing to do here. - case transport.StreamError: - statusCode = err.Code - statusDesc = err.Desc - default: - statusCode = codes.Unknown - statusDesc = err.Error() - } - return err - } - if trInfo != nil { - trInfo.tr.LazyLog(&payload{sent: true, msg: reply}, true) - } - return t.WriteStatus(stream, statusCode, statusDesc) - } -} - -func (s *Server) processStreamingRPC(t transport.ServerTransport, stream *transport.Stream, srv *service, sd *StreamDesc, trInfo *traceInfo) (err error) { - if s.opts.cp != nil { - stream.SetSendCompress(s.opts.cp.Type()) - } - ss := &serverStream{ - t: t, - s: stream, - p: &parser{r: stream}, - codec: s.opts.codec, - cp: s.opts.cp, - dc: s.opts.dc, - maxMsgSize: s.opts.maxMsgSize, - trInfo: trInfo, - } - if ss.cp != nil { - ss.cbuf = new(bytes.Buffer) - } - if trInfo != nil { - trInfo.tr.LazyLog(&trInfo.firstLine, false) - defer func() { - 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() - }() - } - var appErr error - if s.opts.streamInt == nil { - appErr = sd.Handler(srv.server, ss) - } else { - info := &StreamServerInfo{ - FullMethod: stream.Method(), - IsClientStream: sd.ClientStreams, - IsServerStream: sd.ServerStreams, - } - appErr = s.opts.streamInt(srv.server, ss, info, sd.Handler) - } - if appErr != nil { - if err, ok := appErr.(*rpcError); ok { - ss.statusCode = err.code - ss.statusDesc = err.desc - } else if err, ok := appErr.(transport.StreamError); ok { - ss.statusCode = err.Code - ss.statusDesc = err.Desc - } else { - ss.statusCode = convertCode(appErr) - ss.statusDesc = appErr.Error() - } - } - if trInfo != nil { - ss.mu.Lock() - if ss.statusCode != codes.OK { - ss.trInfo.tr.LazyLog(stringer(ss.statusDesc), true) - ss.trInfo.tr.SetError() - } else { - ss.trInfo.tr.LazyLog(stringer("OK"), false) - } - ss.mu.Unlock() - } - return t.WriteStatus(ss.s, ss.statusCode, ss.statusDesc) - -} - -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() - } - if err := t.WriteStatus(stream, codes.InvalidArgument, fmt.Sprintf("malformed method name: %q", stream.Method())); err != nil { - if trInfo != nil { - trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true) - trInfo.tr.SetError() - } - grpclog.Printf("grpc: Server.handleStream failed to write status: %v", err) - } - if trInfo != nil { - trInfo.tr.Finish() - } - return - } - service := sm[:pos] - method := sm[pos+1:] - srv, ok := s.m[service] - if !ok { - if trInfo != nil { - trInfo.tr.LazyLog(&fmtStringer{"Unknown service %v", []interface{}{service}}, true) - trInfo.tr.SetError() - } - if err := t.WriteStatus(stream, codes.Unimplemented, fmt.Sprintf("unknown service %v", service)); err != nil { - if trInfo != nil { - trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true) - trInfo.tr.SetError() - } - grpclog.Printf("grpc: Server.handleStream failed to write status: %v", err) - } - if trInfo != nil { - trInfo.tr.Finish() - } - return - } - // Unary RPC or Streaming RPC? - if md, ok := srv.md[method]; ok { - s.processUnaryRPC(t, stream, srv, md, trInfo) - return - } - if sd, ok := srv.sd[method]; ok { - s.processStreamingRPC(t, stream, srv, sd, trInfo) - return - } - if trInfo != nil { - trInfo.tr.LazyLog(&fmtStringer{"Unknown method %v", []interface{}{method}}, true) - trInfo.tr.SetError() - } - if err := t.WriteStatus(stream, codes.Unimplemented, fmt.Sprintf("unknown method %v", method)); err != nil { - if trInfo != nil { - trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true) - trInfo.tr.SetError() - } - grpclog.Printf("grpc: Server.handleStream failed to write status: %v", err) - } - if trInfo != nil { - trInfo.tr.Finish() - } -} - -// 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.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() - } - - s.mu.Lock() - s.cancel() - if s.events != nil { - s.events.Finish() - s.events = nil - } - s.mu.Unlock() -} - -// GracefulStop stops the gRPC server gracefully. It stops the server to accept new -// connections and RPCs and blocks until all the pending RPCs are finished. -func (s *Server) GracefulStop() { - s.mu.Lock() - defer s.mu.Unlock() - if s.conns == nil { - return - } - for lis := range s.lis { - lis.Close() - } - s.lis = nil - s.cancel() - if !s.drain { - for c := range s.conns { - c.(transport.ServerTransport).Drain() - } - s.drain = true - } - for len(s.conns) != 0 { - s.cv.Wait() - } - s.conns = nil - if s.events != nil { - s.events.Finish() - s.events = nil - } -} - -func init() { - internal.TestingCloseConns = func(arg interface{}) { - arg.(*Server).testingCloseConns() - } - internal.TestingUseHandlerImpl = func(arg interface{}) { - arg.(*Server).opts.useHandlerImpl = true - } -} - -// testingCloseConns closes all existing transports but keeps s.lis -// accepting new connections. -func (s *Server) testingCloseConns() { - s.mu.Lock() - for c := range s.conns { - c.Close() - delete(s.conns, c) - } - s.mu.Unlock() -} - -// 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, ok := transport.StreamFromContext(ctx) - if !ok { - return 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, ok := transport.StreamFromContext(ctx) - if !ok { - return Errorf(codes.Internal, "grpc: failed to fetch the stream from the context %v", ctx) - } - t := stream.ServerTransport() - if t == nil { - grpclog.Fatalf("grpc: SendHeader: %v has no ServerTransport to send header metadata.", stream) - } - if err := t.WriteHeader(stream, 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, ok := transport.StreamFromContext(ctx) - if !ok { - return Errorf(codes.Internal, "grpc: failed to fetch the stream from the context %v", ctx) - } - return stream.SetTrailer(md) -} diff --git a/vendor/google.golang.org/grpc/stream.go b/vendor/google.golang.org/grpc/stream.go deleted file mode 100644 index 46810544f..000000000 --- a/vendor/google.golang.org/grpc/stream.go +++ /dev/null @@ -1,526 +0,0 @@ -/* - * - * Copyright 2014, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -package grpc - -import ( - "bytes" - "errors" - "io" - "math" - "sync" - "time" - - "golang.org/x/net/context" - "golang.org/x/net/trace" - "google.golang.org/grpc/codes" - "google.golang.org/grpc/metadata" - "google.golang.org/grpc/transport" -) - -// StreamHandler defines the handler called by gRPC server to complete the -// execution of a streaming 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. -type Stream interface { - // Context returns the context for this stream. - Context() context.Context - // SendMsg blocks until it sends m, the stream is done or the stream - // breaks. - // On error, it aborts the stream and returns an RPC status on client - // side. On server side, it simply returns the error to the caller. - // SendMsg is called by generated code. Also Users can call SendMsg - // directly when it is really needed in their use cases. - SendMsg(m interface{}) error - // RecvMsg blocks until it receives a message or the stream is - // done. On client side, it returns io.EOF when the stream is done. On - // any other error, it aborts the stream and returns an RPC status. On - // server side, it simply returns the error to the caller. - RecvMsg(m interface{}) error -} - -// ClientStream defines the interface a client stream has to satisfy. -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. - CloseSend() error - Stream -} - -// NewClientStream creates a new Stream for the client side. This is called -// by generated code. -func NewClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (ClientStream, error) { - if cc.dopts.streamInt != nil { - return cc.dopts.streamInt(ctx, desc, cc, method, newClientStream, opts...) - } - return newClientStream(ctx, desc, cc, method, opts...) -} - -func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (_ ClientStream, err error) { - var ( - t transport.ClientTransport - s *transport.Stream - put func() - ) - c := defaultCallInfo - for _, o := range opts { - if err := o.before(&c); err != nil { - return nil, toRPCErr(err) - } - } - callHdr := &transport.CallHdr{ - Host: cc.authority, - Method: method, - Flush: desc.ServerStreams && desc.ClientStreams, - } - if cc.dopts.cp != nil { - callHdr.SendCompress = cc.dopts.cp.Type() - } - var trInfo traceInfo - if EnableTracing { - trInfo.tr = trace.New("grpc.Sent."+methodFamily(method), method) - trInfo.firstLine.client = true - if deadline, ok := ctx.Deadline(); ok { - trInfo.firstLine.deadline = deadline.Sub(time.Now()) - } - trInfo.tr.LazyLog(&trInfo.firstLine, false) - ctx = trace.NewContext(ctx, trInfo.tr) - defer func() { - if err != nil { - // Need to call tr.finish() if error is returned. - // Because tr will not be returned to caller. - trInfo.tr.LazyPrintf("RPC: [%v]", err) - trInfo.tr.SetError() - trInfo.tr.Finish() - } - }() - } - gopts := BalancerGetOptions{ - BlockingWait: !c.failFast, - } - for { - t, put, err = cc.getTransport(ctx, gopts) - if err != nil { - // TODO(zhaoq): Probably revisit the error handling. - if _, ok := err.(*rpcError); ok { - return nil, err - } - if err == errConnClosing || err == errConnUnavailable { - if c.failFast { - return nil, Errorf(codes.Unavailable, "%v", err) - } - continue - } - // All the other errors are treated as Internal errors. - return nil, Errorf(codes.Internal, "%v", err) - } - - s, err = t.NewStream(ctx, callHdr) - if err != nil { - if put != nil { - put() - put = nil - } - if _, ok := err.(transport.ConnectionError); ok || err == transport.ErrStreamDrain { - if c.failFast { - return nil, toRPCErr(err) - } - continue - } - return nil, toRPCErr(err) - } - break - } - cs := &clientStream{ - opts: opts, - c: c, - desc: desc, - codec: cc.dopts.codec, - cp: cc.dopts.cp, - dc: cc.dopts.dc, - - put: put, - t: t, - s: s, - p: &parser{r: s}, - - tracing: EnableTracing, - trInfo: trInfo, - } - if cc.dopts.cp != nil { - cs.cbuf = new(bytes.Buffer) - } - // Listen on ctx.Done() to detect cancellation and s.Done() to detect normal termination - // when there is no pending I/O operations on this stream. - go func() { - select { - case <-t.Error(): - // Incur transport error, simply exit. - case <-s.Done(): - // TODO: The trace of the RPC is terminated here when there is no pending - // I/O, which is probably not the optimal solution. - if s.StatusCode() == codes.OK { - cs.finish(nil) - } else { - cs.finish(Errorf(s.StatusCode(), "%s", s.StatusDesc())) - } - cs.closeTransportStream(nil) - case <-s.GoAway(): - cs.finish(errConnDrain) - cs.closeTransportStream(errConnDrain) - case <-s.Context().Done(): - err := s.Context().Err() - cs.finish(err) - cs.closeTransportStream(transport.ContextErr(err)) - } - }() - return cs, nil -} - -// clientStream implements a client side Stream. -type clientStream struct { - opts []CallOption - c callInfo - t transport.ClientTransport - s *transport.Stream - p *parser - desc *StreamDesc - codec Codec - cp Compressor - cbuf *bytes.Buffer - dc Decompressor - - tracing bool // set to EnableTracing when the clientStream is created. - - mu sync.Mutex - put func() - closed bool - // trInfo.tr is set when the clientStream is created (if EnableTracing is true), - // and is set to nil when the clientStream's finish method is called. - trInfo traceInfo -} - -func (cs *clientStream) Context() context.Context { - return cs.s.Context() -} - -func (cs *clientStream) Header() (metadata.MD, error) { - m, err := cs.s.Header() - if err != nil { - if _, ok := err.(transport.ConnectionError); !ok { - cs.closeTransportStream(err) - } - } - return m, err -} - -func (cs *clientStream) Trailer() metadata.MD { - return cs.s.Trailer() -} - -func (cs *clientStream) SendMsg(m interface{}) (err error) { - if cs.tracing { - cs.mu.Lock() - if cs.trInfo.tr != nil { - cs.trInfo.tr.LazyLog(&payload{sent: true, msg: m}, true) - } - cs.mu.Unlock() - } - defer func() { - if err != nil { - cs.finish(err) - } - if err == nil { - return - } - if err == io.EOF { - // Specialize the process for server streaming. SendMesg is only called - // once when creating the stream object. io.EOF needs to be skipped when - // the rpc is early finished (before the stream object is created.). - // TODO: It is probably better to move this into the generated code. - if !cs.desc.ClientStreams && cs.desc.ServerStreams { - err = nil - } - return - } - if _, ok := err.(transport.ConnectionError); !ok { - cs.closeTransportStream(err) - } - err = toRPCErr(err) - }() - out, err := encode(cs.codec, m, cs.cp, cs.cbuf) - defer func() { - if cs.cbuf != nil { - cs.cbuf.Reset() - } - }() - if err != nil { - return Errorf(codes.Internal, "grpc: %v", err) - } - return cs.t.Write(cs.s, out, &transport.Options{Last: false}) -} - -func (cs *clientStream) RecvMsg(m interface{}) (err error) { - err = recv(cs.p, cs.codec, cs.s, cs.dc, m, math.MaxInt32) - defer func() { - // err != nil indicates the termination of the stream. - if err != nil { - cs.finish(err) - } - }() - if err == nil { - if cs.tracing { - cs.mu.Lock() - if cs.trInfo.tr != nil { - cs.trInfo.tr.LazyLog(&payload{sent: false, msg: m}, true) - } - cs.mu.Unlock() - } - if !cs.desc.ClientStreams || cs.desc.ServerStreams { - return - } - // Special handling for client streaming rpc. - err = recv(cs.p, cs.codec, cs.s, cs.dc, m, math.MaxInt32) - cs.closeTransportStream(err) - if err == nil { - return toRPCErr(errors.New("grpc: client streaming protocol violation: get <nil>, want <EOF>")) - } - if err == io.EOF { - if cs.s.StatusCode() == codes.OK { - cs.finish(err) - return nil - } - return Errorf(cs.s.StatusCode(), "%s", cs.s.StatusDesc()) - } - return toRPCErr(err) - } - if _, ok := err.(transport.ConnectionError); !ok { - cs.closeTransportStream(err) - } - if err == io.EOF { - if cs.s.StatusCode() == codes.OK { - // Returns io.EOF to indicate the end of the stream. - return - } - return Errorf(cs.s.StatusCode(), "%s", cs.s.StatusDesc()) - } - return toRPCErr(err) -} - -func (cs *clientStream) CloseSend() (err error) { - err = cs.t.Write(cs.s, nil, &transport.Options{Last: true}) - defer func() { - if err != nil { - cs.finish(err) - } - }() - if err == nil || err == io.EOF { - return nil - } - if _, ok := err.(transport.ConnectionError); !ok { - cs.closeTransportStream(err) - } - err = toRPCErr(err) - return -} - -func (cs *clientStream) closeTransportStream(err error) { - cs.mu.Lock() - if cs.closed { - cs.mu.Unlock() - return - } - cs.closed = true - cs.mu.Unlock() - cs.t.CloseStream(cs.s, err) -} - -func (cs *clientStream) finish(err error) { - cs.mu.Lock() - defer cs.mu.Unlock() - for _, o := range cs.opts { - o.after(&cs.c) - } - if cs.put != nil { - cs.put() - cs.put = nil - } - if !cs.tracing { - return - } - if cs.trInfo.tr != nil { - if err == nil || err == io.EOF { - cs.trInfo.tr.LazyPrintf("RPC: [OK]") - } else { - cs.trInfo.tr.LazyPrintf("RPC: [%v]", err) - cs.trInfo.tr.SetError() - } - cs.trInfo.tr.Finish() - cs.trInfo.tr = nil - } -} - -// ServerStream defines the interface a server stream has to satisfy. -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) - Stream -} - -// serverStream implements a server side Stream. -type serverStream struct { - t transport.ServerTransport - s *transport.Stream - p *parser - codec Codec - cp Compressor - dc Decompressor - cbuf *bytes.Buffer - maxMsgSize int - statusCode codes.Code - statusDesc string - trInfo *traceInfo - - mu sync.Mutex // protects trInfo.tr after the service handler runs. -} - -func (ss *serverStream) Context() context.Context { - return ss.s.Context() -} - -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 { - return ss.t.WriteHeader(ss.s, md) -} - -func (ss *serverStream) SetTrailer(md metadata.MD) { - if md.Len() == 0 { - return - } - ss.s.SetTrailer(md) - return -} - -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() - } - }() - out, err := encode(ss.codec, m, ss.cp, ss.cbuf) - defer func() { - if ss.cbuf != nil { - ss.cbuf.Reset() - } - }() - if err != nil { - err = Errorf(codes.Internal, "grpc: %v", err) - return err - } - if err := ss.t.Write(ss.s, out, &transport.Options{Last: false}); err != nil { - return toRPCErr(err) - } - 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 := recv(ss.p, ss.codec, ss.s, ss.dc, m, ss.maxMsgSize); err != nil { - if err == io.EOF { - return err - } - if err == io.ErrUnexpectedEOF { - err = Errorf(codes.Internal, io.ErrUnexpectedEOF.Error()) - } - return toRPCErr(err) - } - return nil -} diff --git a/vendor/google.golang.org/grpc/trace.go b/vendor/google.golang.org/grpc/trace.go deleted file mode 100644 index f6747e1df..000000000 --- a/vendor/google.golang.org/grpc/trace.go +++ /dev/null @@ -1,119 +0,0 @@ -/* - * - * Copyright 2015, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -package grpc - -import ( - "bytes" - "fmt" - "io" - "net" - "strings" - "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 = true - -// 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 - } - if i := strings.LastIndex(m, "."); i >= 0 { - m = m[i+1:] // cut down to last dotted component - } - 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. -type firstLine struct { - client bool // whether this is a client (outgoing) RPC - remoteAddr net.Addr - deadline time.Duration // may be zero -} - -func (f *firstLine) String() string { - 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() -} - -// 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 fmt.Sprintf("sent: %v", p.msg) - } - return fmt.Sprintf("recv: %v", p.msg) -} - -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/transport/control.go b/vendor/google.golang.org/grpc/transport/control.go deleted file mode 100644 index 4ef0830b5..000000000 --- a/vendor/google.golang.org/grpc/transport/control.go +++ /dev/null @@ -1,215 +0,0 @@ -/* - * - * Copyright 2014, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -package transport - -import ( - "fmt" - "sync" - - "golang.org/x/net/http2" -) - -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 - initialConnWindowSize = defaultWindowSize * 16 // for a connection -) - -// 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. -type windowUpdate struct { - streamID uint32 - increment uint32 -} - -func (*windowUpdate) item() {} - -type settings struct { - ack bool - ss []http2.Setting -} - -func (*settings) item() {} - -type resetStream struct { - streamID uint32 - code http2.ErrCode -} - -func (*resetStream) item() {} - -type goAway struct { -} - -func (*goAway) item() {} - -type flushIO struct { -} - -func (*flushIO) item() {} - -type ping struct { - ack bool - data [8]byte -} - -func (*ping) item() {} - -// quotaPool is a pool which accumulates the quota and sends it to acquire() -// when it is available. -type quotaPool struct { - c chan int - - mu sync.Mutex - quota int -} - -// newQuotaPool creates a quotaPool which has quota q available to consume. -func newQuotaPool(q int) *quotaPool { - qb := "aPool{ - c: make(chan int, 1), - } - if q > 0 { - qb.c <- q - } else { - qb.quota = q - } - return qb -} - -// add adds n to the available quota and tries to send it on acquire. -func (qb *quotaPool) add(n int) { - qb.mu.Lock() - defer qb.mu.Unlock() - qb.quota += n - if qb.quota <= 0 { - return - } - select { - case qb.c <- qb.quota: - qb.quota = 0 - default: - } -} - -// cancel cancels the pending quota sent on acquire, if any. -func (qb *quotaPool) cancel() { - qb.mu.Lock() - defer qb.mu.Unlock() - select { - case n := <-qb.c: - qb.quota += n - default: - } -} - -// reset cancels the pending quota sent on acquired, incremented by v and sends -// it back on acquire. -func (qb *quotaPool) reset(v int) { - qb.mu.Lock() - defer qb.mu.Unlock() - select { - case n := <-qb.c: - qb.quota += n - default: - } - qb.quota += v - if qb.quota <= 0 { - return - } - select { - case qb.c <- qb.quota: - qb.quota = 0 - default: - } -} - -// acquire returns the channel on which available quota amounts are sent. -func (qb *quotaPool) acquire() <-chan int { - return qb.c -} - -// inFlow deals with inbound flow control -type inFlow struct { - // The inbound flow control limit for pending data. - limit uint32 - - mu sync.Mutex - // 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 -} - -// onData is invoked when some data frame is received. It updates pendingData. -func (f *inFlow) onData(n uint32) error { - f.mu.Lock() - defer f.mu.Unlock() - f.pendingData += n - if f.pendingData+f.pendingUpdate > f.limit { - return fmt.Errorf("received %d-bytes data exceeding the limit %d bytes", f.pendingData+f.pendingUpdate, f.limit) - } - 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() - defer f.mu.Unlock() - if f.pendingData == 0 { - return 0 - } - f.pendingData -= n - f.pendingUpdate += n - if f.pendingUpdate >= f.limit/4 { - wu := f.pendingUpdate - f.pendingUpdate = 0 - return wu - } - return 0 -} - -func (f *inFlow) resetPendingData() uint32 { - f.mu.Lock() - defer f.mu.Unlock() - n := f.pendingData - f.pendingData = 0 - return n -} diff --git a/vendor/google.golang.org/grpc/transport/go16.go b/vendor/google.golang.org/grpc/transport/go16.go deleted file mode 100644 index ee1c46bad..000000000 --- a/vendor/google.golang.org/grpc/transport/go16.go +++ /dev/null @@ -1,46 +0,0 @@ -// +build go1.6,!go1.7 - -/* - * Copyright 2016, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -package transport - -import ( - "net" - - "golang.org/x/net/context" -) - -// dialContext connects to the address on the named network. -func dialContext(ctx context.Context, network, address string) (net.Conn, error) { - return (&net.Dialer{Cancel: ctx.Done()}).Dial(network, address) -} diff --git a/vendor/google.golang.org/grpc/transport/go17.go b/vendor/google.golang.org/grpc/transport/go17.go deleted file mode 100644 index 356f13ff1..000000000 --- a/vendor/google.golang.org/grpc/transport/go17.go +++ /dev/null @@ -1,46 +0,0 @@ -// +build go1.7 - -/* - * Copyright 2016, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -package transport - -import ( - "net" - - "golang.org/x/net/context" -) - -// dialContext connects to the address on the named network. -func dialContext(ctx context.Context, network, address string) (net.Conn, error) { - return (&net.Dialer{}).DialContext(ctx, network, address) -} diff --git a/vendor/google.golang.org/grpc/transport/handler_server.go b/vendor/google.golang.org/grpc/transport/handler_server.go deleted file mode 100644 index 114e34906..000000000 --- a/vendor/google.golang.org/grpc/transport/handler_server.go +++ /dev/null @@ -1,397 +0,0 @@ -/* - * Copyright 2016, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -// 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 ( - "errors" - "fmt" - "io" - "net" - "net/http" - "strings" - "sync" - "time" - - "golang.org/x/net/context" - "golang.org/x/net/http2" - "google.golang.org/grpc/codes" - "google.golang.org/grpc/credentials" - "google.golang.org/grpc/metadata" - "google.golang.org/grpc/peer" -) - -// 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) (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") - } - if !validContentType(r.Header.Get("Content-Type")) { - 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") - } - if _, ok := w.(http.CloseNotifier); !ok { - return nil, errors.New("gRPC requires a ResponseWriter supporting http.CloseNotifier") - } - - st := &serverHandlerTransport{ - rw: w, - req: r, - closedCh: make(chan struct{}), - writes: make(chan func()), - } - - if v := r.Header.Get("grpc-timeout"); v != "" { - to, err := decodeTimeout(v) - if err != nil { - return nil, streamErrorf(codes.Internal, "malformed time-out: %v", err) - } - st.timeoutSet = true - st.timeout = to - } - - var metakv []string - if r.Host != "" { - metakv = append(metakv, ":authority", r.Host) - } - for k, vv := range r.Header { - k = strings.ToLower(k) - if isReservedHeader(k) && !isWhitelistedPseudoHeader(k) { - continue - } - for _, v := range vv { - if k == "user-agent" { - // user-agent is special. Copying logic of http_util.go. - if i := strings.LastIndex(v, " "); i == -1 { - // There is no application user agent string being set - continue - } else { - v = v[:i] - } - } - 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 - didCommonHeaders bool - - 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() -} - -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.writes <- fn: - return nil - case <-ht.closedCh: - return ErrConnClosing - } -} - -func (ht *serverHandlerTransport) WriteStatus(s *Stream, statusCode codes.Code, statusDesc string) error { - err := ht.do(func() { - ht.writeCommonHeaders(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", statusCode)) - if statusDesc != "" { - h.Set("Grpc-Message", encodeGrpcMessage(statusDesc)) - } - 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, v) - } - } - } - }) - close(ht.writes) - return err -} - -// writeCommonHeaders sets common headers on the first write -// call (Write, WriteHeader, or WriteStatus). -func (ht *serverHandlerTransport) writeCommonHeaders(s *Stream) { - if ht.didCommonHeaders { - return - } - ht.didCommonHeaders = true - - h := ht.rw.Header() - h["Date"] = nil // suppress Date to make tests happy; TODO: restore - h.Set("Content-Type", "application/grpc") - - // 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") - - if s.sendCompress != "" { - h.Set("Grpc-Encoding", s.sendCompress) - } -} - -func (ht *serverHandlerTransport) Write(s *Stream, data []byte, opts *Options) error { - return ht.do(func() { - ht.writeCommonHeaders(s) - ht.rw.Write(data) - if !opts.Delay { - ht.rw.(http.Flusher).Flush() - } - }) -} - -func (ht *serverHandlerTransport) WriteHeader(s *Stream, md metadata.MD) error { - return ht.do(func() { - ht.writeCommonHeaders(s) - h := ht.rw.Header() - 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 { - h.Add(k, v) - } - } - ht.rw.WriteHeader(200) - ht.rw.(http.Flusher).Flush() - }) -} - -func (ht *serverHandlerTransport) HandleStreams(startStream func(*Stream)) { - // With this transport type there will be exactly 1 stream: this HTTP request. - - var ctx context.Context - var cancel context.CancelFunc - if ht.timeoutSet { - ctx, cancel = context.WithTimeout(context.Background(), ht.timeout) - } else { - ctx, cancel = context.WithCancel(context.Background()) - } - - // requestOver is closed when either the request's context is done - // or the status has been written via WriteStatus. - requestOver := make(chan struct{}) - - // clientGone receives a single value if peer is gone, either - // because the underlying connection is dead or because the - // peer sends an http2 RST_STREAM. - clientGone := ht.rw.(http.CloseNotifier).CloseNotify() - go func() { - select { - case <-requestOver: - return - case <-ht.closedCh: - case <-clientGone: - } - cancel() - }() - - req := ht.req - - s := &Stream{ - id: 0, // irrelevant - windowHandler: func(int) {}, // nothing - cancel: cancel, - buf: newRecvBuffer(), - st: ht, - method: req.URL.Path, - recvCompress: req.Header.Get("grpc-encoding"), - } - pr := &peer.Peer{ - Addr: ht.RemoteAddr(), - } - if req.TLS != nil { - pr.AuthInfo = credentials.TLSInfo{State: *req.TLS} - } - ctx = metadata.NewContext(ctx, ht.headerMD) - ctx = peer.NewContext(ctx, pr) - s.ctx = newContextWithStream(ctx, s) - s.dec = &recvBufferReader{ctx: s.ctx, recv: s.buf} - - // 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{data: 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, ok := <-ht.writes: - if !ok { - return - } - fn() - case <-ht.closedCh: - return - } - } -} - -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 -// * of type transport.StreamError -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 StreamError{ - Code: code, - Desc: se.Error(), - } - } - } - return connectionErrorf(true, err, err.Error()) -} diff --git a/vendor/google.golang.org/grpc/transport/http2_client.go b/vendor/google.golang.org/grpc/transport/http2_client.go deleted file mode 100644 index 2b0f68016..000000000 --- a/vendor/google.golang.org/grpc/transport/http2_client.go +++ /dev/null @@ -1,1072 +0,0 @@ -/* - * - * Copyright 2014, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -package transport - -import ( - "bytes" - "fmt" - "io" - "math" - "net" - "strings" - "sync" - "time" - - "golang.org/x/net/context" - "golang.org/x/net/http2" - "golang.org/x/net/http2/hpack" - "google.golang.org/grpc/codes" - "google.golang.org/grpc/credentials" - "google.golang.org/grpc/grpclog" - "google.golang.org/grpc/metadata" - "google.golang.org/grpc/peer" -) - -// http2Client implements the ClientTransport interface with HTTP2. -type http2Client struct { - target string // server name/addr - userAgent string - md interface{} - conn net.Conn // underlying communication channel - authInfo credentials.AuthInfo // auth info about the connection - nextID uint32 // the next stream ID to be used - - // writableChan synchronizes write access to the transport. - // A writer acquires the write lock by sending a value on writableChan - // and releases it by receiving from writableChan. - writableChan chan int - // shutdownChan is closed when Close is called. - // Blocking operations should select on shutdownChan to avoid - // blocking forever after Close. - // TODO(zhaoq): Maybe have a channel context? - shutdownChan chan struct{} - // errorChan is closed to notify the I/O error to the caller. - errorChan chan struct{} - // 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 - hBuf *bytes.Buffer // the buffer for HPACK encoding - hEnc *hpack.Encoder // HPACK encoder - - // controlBuf delivers all the control related tasks (e.g., window - // updates, reset streams, and various settings) to the controller. - controlBuf *recvBuffer - fc *inFlow - // sendQuotaPool provides flow control to outbound message. - sendQuotaPool *quotaPool - // streamsQuota limits the max number of concurrent streams. - streamsQuota *quotaPool - - // The scheme used: https if TLS is on, http otherwise. - scheme string - - creds []credentials.PerRPCCredentials - - mu sync.Mutex // guard the following variables - state transportState // the state of underlying connection - activeStreams map[uint32]*Stream - // The max number of concurrent streams - maxStreams int - // the per-stream outbound flow control window size set by the peer. - streamSendQuota uint32 - // goAwayID records the Last-Stream-ID in the GoAway frame from the server. - goAwayID uint32 - // prevGoAway ID records the Last-Stream-ID in the previous GOAway frame. - prevGoAwayID uint32 -} - -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 dialContext(ctx, "tcp", addr) -} - -func isTemporary(err error) bool { - switch err { - case io.EOF: - // Connection closures may be resolved upon retry, and are thus - // treated as temporary. - return true - case context.DeadlineExceeded: - // In Go 1.7, context.DeadlineExceeded implements Timeout(), and this - // special case is not needed. Until then, we need to keep this - // clause. - return true - } - - 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 false -} - -// 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(ctx context.Context, addr TargetInfo, opts ConnectOptions) (_ ClientTransport, err error) { - scheme := "http" - conn, err := dial(ctx, opts.Dialer, addr.Addr) - if err != nil { - return nil, connectionErrorf(true, err, "transport: %v", err) - } - // Any further errors will close the underlying connection - defer func(conn net.Conn) { - if err != nil { - conn.Close() - } - }(conn) - var authInfo credentials.AuthInfo - if creds := opts.TransportCredentials; creds != nil { - scheme = "https" - conn, authInfo, err = creds.ClientHandshake(ctx, addr.Addr, conn) - if err != nil { - // Credentials handshake errors are typically considered permanent - // to avoid retrying on e.g. bad certificates. - temp := isTemporary(err) - return nil, connectionErrorf(temp, err, "transport: %v", err) - } - } - ua := primaryUA - if opts.UserAgent != "" { - ua = opts.UserAgent + " " + ua - } - var buf bytes.Buffer - t := &http2Client{ - target: addr.Addr, - userAgent: ua, - md: addr.Metadata, - conn: conn, - authInfo: authInfo, - // The client initiated stream id is odd starting from 1. - nextID: 1, - writableChan: make(chan int, 1), - shutdownChan: make(chan struct{}), - errorChan: make(chan struct{}), - goAway: make(chan struct{}), - framer: newFramer(conn), - hBuf: &buf, - hEnc: hpack.NewEncoder(&buf), - controlBuf: newRecvBuffer(), - fc: &inFlow{limit: initialConnWindowSize}, - sendQuotaPool: newQuotaPool(defaultWindowSize), - scheme: scheme, - state: reachable, - activeStreams: make(map[uint32]*Stream), - creds: opts.PerRPCCredentials, - maxStreams: math.MaxInt32, - streamSendQuota: defaultWindowSize, - } - // 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: %v", err) - } - if n != len(clientPreface) { - t.Close() - return nil, connectionErrorf(true, err, "transport: preface mismatch, wrote %d bytes; want %d", n, len(clientPreface)) - } - if initialWindowSize != defaultWindowSize { - err = t.framer.writeSettings(true, http2.Setting{ - ID: http2.SettingInitialWindowSize, - Val: uint32(initialWindowSize), - }) - } else { - err = t.framer.writeSettings(true) - } - if err != nil { - t.Close() - return nil, connectionErrorf(true, err, "transport: %v", err) - } - // Adjust the connection flow control window if needed. - if delta := uint32(initialConnWindowSize - defaultWindowSize); delta > 0 { - if err := t.framer.writeWindowUpdate(true, 0, delta); err != nil { - t.Close() - return nil, connectionErrorf(true, err, "transport: %v", err) - } - } - go t.controller() - t.writableChan <- 0 - return t, nil -} - -func (t *http2Client) newStream(ctx context.Context, callHdr *CallHdr) *Stream { - // TODO(zhaoq): Handle uint32 overflow of Stream.id. - s := &Stream{ - id: t.nextID, - done: make(chan struct{}), - goAway: make(chan struct{}), - method: callHdr.Method, - sendCompress: callHdr.SendCompress, - buf: newRecvBuffer(), - fc: &inFlow{limit: initialWindowSize}, - sendQuotaPool: newQuotaPool(int(t.streamSendQuota)), - headerChan: make(chan struct{}), - } - t.nextID += 2 - s.windowHandler = func(n int) { - t.updateWindow(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.dec = &recvBufferReader{ - ctx: s.ctx, - goAway: s.goAway, - recv: s.buf, - } - return s -} - -// NewStream creates a stream and register it into the transport as "active" -// streams. -func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Stream, err error) { - pr := &peer.Peer{ - Addr: t.conn.RemoteAddr(), - } - // Attach Auth info if there is any. - if t.authInfo != nil { - pr.AuthInfo = t.authInfo - } - ctx = peer.NewContext(ctx, pr) - authData := make(map[string]string) - for _, c := range t.creds { - // Construct URI required to get auth request metadata. - var port string - if pos := strings.LastIndex(t.target, ":"); pos != -1 { - // Omit port if it is the default one. - if t.target[pos+1:] != "443" { - port = ":" + t.target[pos+1:] - } - } - pos := strings.LastIndex(callHdr.Method, "/") - if pos == -1 { - return nil, streamErrorf(codes.InvalidArgument, "transport: malformed method name: %q", callHdr.Method) - } - audience := "https://" + callHdr.Host + port + callHdr.Method[:pos] - data, err := c.GetRequestMetadata(ctx, audience) - if err != nil { - return nil, streamErrorf(codes.InvalidArgument, "transport: %v", err) - } - for k, v := range data { - authData[k] = v - } - } - t.mu.Lock() - if t.activeStreams == nil { - t.mu.Unlock() - return nil, ErrConnClosing - } - if t.state == draining { - t.mu.Unlock() - return nil, ErrStreamDrain - } - if t.state != reachable { - t.mu.Unlock() - return nil, ErrConnClosing - } - checkStreamsQuota := t.streamsQuota != nil - t.mu.Unlock() - if checkStreamsQuota { - sq, err := wait(ctx, nil, nil, t.shutdownChan, t.streamsQuota.acquire()) - if err != nil { - return nil, err - } - // Returns the quota balance back. - if sq > 1 { - t.streamsQuota.add(sq - 1) - } - } - if _, err := wait(ctx, nil, nil, t.shutdownChan, t.writableChan); err != nil { - // Return the quota back now because there is no stream returned to the caller. - if _, ok := err.(StreamError); ok && checkStreamsQuota { - t.streamsQuota.add(1) - } - return nil, err - } - t.mu.Lock() - if t.state == draining { - t.mu.Unlock() - if checkStreamsQuota { - t.streamsQuota.add(1) - } - // Need to make t writable again so that the rpc in flight can still proceed. - t.writableChan <- 0 - return nil, ErrStreamDrain - } - if t.state != reachable { - t.mu.Unlock() - return nil, ErrConnClosing - } - s := t.newStream(ctx, callHdr) - t.activeStreams[s.id] = s - - // This stream is not counted when applySetings(...) initialize t.streamsQuota. - // Reset t.streamsQuota to the right value. - var reset bool - if !checkStreamsQuota && t.streamsQuota != nil { - reset = true - } - t.mu.Unlock() - if reset { - t.streamsQuota.reset(-1) - } - - // HPACK encodes various headers. Note that once WriteField(...) is - // called, the corresponding headers/continuation frame has to be sent - // because hpack.Encoder is stateful. - t.hBuf.Reset() - t.hEnc.WriteField(hpack.HeaderField{Name: ":method", Value: "POST"}) - t.hEnc.WriteField(hpack.HeaderField{Name: ":scheme", Value: t.scheme}) - t.hEnc.WriteField(hpack.HeaderField{Name: ":path", Value: callHdr.Method}) - t.hEnc.WriteField(hpack.HeaderField{Name: ":authority", Value: callHdr.Host}) - t.hEnc.WriteField(hpack.HeaderField{Name: "content-type", Value: "application/grpc"}) - t.hEnc.WriteField(hpack.HeaderField{Name: "user-agent", Value: t.userAgent}) - t.hEnc.WriteField(hpack.HeaderField{Name: "te", Value: "trailers"}) - - if callHdr.SendCompress != "" { - t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-encoding", Value: callHdr.SendCompress}) - } - if dl, ok := ctx.Deadline(); ok { - // Send out timeout regardless its value. The server can detect timeout context by itself. - timeout := dl.Sub(time.Now()) - t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-timeout", Value: encodeTimeout(timeout)}) - } - - for k, v := range authData { - // Capital header names are illegal in HTTP/2. - k = strings.ToLower(k) - t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: v}) - } - var ( - hasMD bool - endHeaders bool - ) - if md, ok := metadata.FromContext(ctx); ok { - hasMD = true - for k, v := range md { - // HTTP doesn't allow you to set pseudoheaders after non pseudoheaders were set. - if isReservedHeader(k) { - continue - } - for _, entry := range v { - t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: entry}) - } - } - } - if md, ok := t.md.(*metadata.MD); ok { - for k, v := range *md { - if isReservedHeader(k) { - continue - } - for _, entry := range v { - t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: entry}) - } - } - } - first := true - // Sends the headers in a single batch even when they span multiple frames. - for !endHeaders { - size := t.hBuf.Len() - if size > http2MaxFrameLen { - size = http2MaxFrameLen - } else { - endHeaders = true - } - var flush bool - if endHeaders && (hasMD || callHdr.Flush) { - flush = true - } - if first { - // Sends a HeadersFrame to server to start a new stream. - p := http2.HeadersFrameParam{ - StreamID: s.id, - BlockFragment: t.hBuf.Next(size), - EndStream: false, - EndHeaders: endHeaders, - } - // Do a force flush for the buffered frames iff it is the last headers frame - // and there is header metadata to be sent. Otherwise, there is flushing until - // the corresponding data frame is written. - err = t.framer.writeHeaders(flush, p) - first = false - } else { - // Sends Continuation frames for the leftover headers. - err = t.framer.writeContinuation(flush, s.id, endHeaders, t.hBuf.Next(size)) - } - if err != nil { - t.notifyError(err) - return nil, connectionErrorf(true, err, "transport: %v", err) - } - } - t.writableChan <- 0 - 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 updateStreams bool - t.mu.Lock() - if t.activeStreams == nil { - t.mu.Unlock() - return - } - if t.streamsQuota != nil { - updateStreams = true - } - delete(t.activeStreams, s.id) - if t.state == draining && len(t.activeStreams) == 0 { - // The transport is draining and s is the last live stream on t. - t.mu.Unlock() - t.Close() - return - } - t.mu.Unlock() - if updateStreams { - t.streamsQuota.add(1) - } - s.mu.Lock() - if q := s.fc.resetPendingData(); q > 0 { - if n := t.fc.onRead(q); n > 0 { - t.controlBuf.put(&windowUpdate{0, n}) - } - } - if s.state == streamDone { - s.mu.Unlock() - return - } - if !s.headerDone { - close(s.headerChan) - s.headerDone = true - } - s.state = streamDone - s.mu.Unlock() - if se, ok := err.(StreamError); ok && se.Code != codes.DeadlineExceeded { - t.controlBuf.put(&resetStream{s.id, http2.ErrCodeCancel}) - } -} - -// 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. -func (t *http2Client) Close() (err error) { - t.mu.Lock() - if t.state == closing { - t.mu.Unlock() - return - } - if t.state == reachable || t.state == draining { - close(t.errorChan) - } - t.state = closing - t.mu.Unlock() - close(t.shutdownChan) - err = t.conn.Close() - t.mu.Lock() - streams := t.activeStreams - t.activeStreams = nil - t.mu.Unlock() - // Notify all active streams. - for _, s := range streams { - s.mu.Lock() - if !s.headerDone { - close(s.headerChan) - s.headerDone = true - } - s.mu.Unlock() - s.write(recvMsg{err: ErrConnClosing}) - } - return -} - -func (t *http2Client) GracefulClose() error { - t.mu.Lock() - switch t.state { - case unreachable: - // The server may close the connection concurrently. t is not available for - // any streams. Close it now. - t.mu.Unlock() - t.Close() - return nil - case closing: - t.mu.Unlock() - return nil - } - // Notify the streams which were initiated after the server sent GOAWAY. - select { - case <-t.goAway: - n := t.prevGoAwayID - if n == 0 && t.nextID > 1 { - n = t.nextID - 2 - } - m := t.goAwayID + 2 - if m == 2 { - m = 1 - } - for i := m; i <= n; i += 2 { - if s, ok := t.activeStreams[i]; ok { - close(s.goAway) - } - } - default: - } - if t.state == draining { - t.mu.Unlock() - return nil - } - t.state = draining - active := len(t.activeStreams) - t.mu.Unlock() - if active == 0 { - return t.Close() - } - return nil -} - -// Write formats the data into HTTP2 data frame(s) and sends it out. The caller -// should proceed only if Write returns nil. -// TODO(zhaoq): opts.Delay is ignored in this implementation. Support it later -// if it improves the performance. -func (t *http2Client) Write(s *Stream, data []byte, opts *Options) error { - r := bytes.NewBuffer(data) - for { - var p []byte - if r.Len() > 0 { - size := http2MaxFrameLen - s.sendQuotaPool.add(0) - // Wait until the stream has some quota to send the data. - sq, err := wait(s.ctx, s.done, s.goAway, t.shutdownChan, s.sendQuotaPool.acquire()) - if err != nil { - return err - } - t.sendQuotaPool.add(0) - // Wait until the transport has some quota to send the data. - tq, err := wait(s.ctx, s.done, s.goAway, t.shutdownChan, t.sendQuotaPool.acquire()) - if err != nil { - if _, ok := err.(StreamError); ok || err == io.EOF { - t.sendQuotaPool.cancel() - } - return err - } - if sq < size { - size = sq - } - if tq < size { - size = tq - } - p = r.Next(size) - ps := len(p) - if ps < sq { - // Overbooked stream quota. Return it back. - s.sendQuotaPool.add(sq - ps) - } - if ps < tq { - // Overbooked transport quota. Return it back. - t.sendQuotaPool.add(tq - ps) - } - } - var ( - endStream bool - forceFlush bool - ) - if opts.Last && r.Len() == 0 { - endStream = true - } - // Indicate there is a writer who is about to write a data frame. - t.framer.adjustNumWriters(1) - // Got some quota. Try to acquire writing privilege on the transport. - if _, err := wait(s.ctx, s.done, s.goAway, t.shutdownChan, t.writableChan); err != nil { - if _, ok := err.(StreamError); ok || err == io.EOF { - // Return the connection quota back. - t.sendQuotaPool.add(len(p)) - } - if t.framer.adjustNumWriters(-1) == 0 { - // This writer is the last one in this batch and has the - // responsibility to flush the buffered frames. It queues - // a flush request to controlBuf instead of flushing directly - // in order to avoid the race with other writing or flushing. - t.controlBuf.put(&flushIO{}) - } - return err - } - select { - case <-s.ctx.Done(): - t.sendQuotaPool.add(len(p)) - if t.framer.adjustNumWriters(-1) == 0 { - t.controlBuf.put(&flushIO{}) - } - t.writableChan <- 0 - return ContextErr(s.ctx.Err()) - default: - } - if r.Len() == 0 && t.framer.adjustNumWriters(0) == 1 { - // Do a force flush iff this is last frame for the entire gRPC message - // and the caller is the only writer at this moment. - forceFlush = true - } - // If WriteData fails, all the pending streams will be handled - // by http2Client.Close(). No explicit CloseStream() needs to be - // invoked. - if err := t.framer.writeData(forceFlush, s.id, endStream, p); err != nil { - t.notifyError(err) - return connectionErrorf(true, err, "transport: %v", err) - } - if t.framer.adjustNumWriters(-1) == 0 { - t.framer.flushWrite() - } - t.writableChan <- 0 - if r.Len() == 0 { - break - } - } - if !opts.Last { - return nil - } - s.mu.Lock() - if s.state != streamDone { - s.state = streamWriteDone - } - s.mu.Unlock() - return nil -} - -func (t *http2Client) getStream(f http2.Frame) (*Stream, bool) { - t.mu.Lock() - defer t.mu.Unlock() - s, ok := t.activeStreams[f.Header().StreamID] - return s, ok -} - -// 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 *http2Client) updateWindow(s *Stream, n uint32) { - s.mu.Lock() - defer s.mu.Unlock() - if s.state == streamDone { - return - } - if w := t.fc.onRead(n); w > 0 { - t.controlBuf.put(&windowUpdate{0, w}) - } - if w := s.fc.onRead(n); w > 0 { - t.controlBuf.put(&windowUpdate{s.id, w}) - } -} - -func (t *http2Client) handleData(f *http2.DataFrame) { - size := len(f.Data()) - if err := t.fc.onData(uint32(size)); err != nil { - t.notifyError(connectionErrorf(true, err, "%v", err)) - return - } - // Select the right stream to dispatch. - s, ok := t.getStream(f) - if !ok { - if w := t.fc.onRead(uint32(size)); w > 0 { - t.controlBuf.put(&windowUpdate{0, w}) - } - return - } - if size > 0 { - s.mu.Lock() - if s.state == streamDone { - s.mu.Unlock() - // The stream has been closed. Release the corresponding quota. - if w := t.fc.onRead(uint32(size)); w > 0 { - t.controlBuf.put(&windowUpdate{0, w}) - } - return - } - if err := s.fc.onData(uint32(size)); err != nil { - s.state = streamDone - s.statusCode = codes.Internal - s.statusDesc = err.Error() - close(s.done) - s.mu.Unlock() - s.write(recvMsg{err: io.EOF}) - t.controlBuf.put(&resetStream{s.id, http2.ErrCodeFlowControl}) - return - } - s.mu.Unlock() - // 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? - data := make([]byte, size) - copy(data, f.Data()) - s.write(recvMsg{data: data}) - } - // 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) { - s.mu.Lock() - if s.state == streamDone { - s.mu.Unlock() - return - } - s.state = streamDone - s.statusCode = codes.Internal - s.statusDesc = "server closed the stream without sending trailers" - close(s.done) - s.mu.Unlock() - s.write(recvMsg{err: io.EOF}) - } -} - -func (t *http2Client) handleRSTStream(f *http2.RSTStreamFrame) { - s, ok := t.getStream(f) - if !ok { - return - } - s.mu.Lock() - if s.state == streamDone { - s.mu.Unlock() - return - } - s.state = streamDone - if !s.headerDone { - close(s.headerChan) - s.headerDone = true - } - s.statusCode, ok = http2ErrConvTab[http2.ErrCode(f.ErrCode)] - if !ok { - grpclog.Println("transport: http2Client.handleRSTStream found no mapped gRPC status for the received http2 error ", f.ErrCode) - s.statusCode = codes.Unknown - } - s.statusDesc = fmt.Sprintf("stream terminated by RST_STREAM with error code: %d", f.ErrCode) - close(s.done) - s.mu.Unlock() - s.write(recvMsg{err: io.EOF}) -} - -func (t *http2Client) handleSettings(f *http2.SettingsFrame) { - if f.IsAck() { - return - } - var ss []http2.Setting - f.ForeachSetting(func(s http2.Setting) error { - ss = append(ss, s) - return nil - }) - // The settings will be applied once the ack is sent. - t.controlBuf.put(&settings{ack: true, ss: ss}) -} - -func (t *http2Client) handlePing(f *http2.PingFrame) { - if f.IsAck() { // Do nothing. - 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 == reachable || t.state == draining { - if f.LastStreamID > 0 && f.LastStreamID%2 != 1 { - t.mu.Unlock() - t.notifyError(connectionErrorf(true, nil, "received illegal http2 GOAWAY frame: stream ID %d is even", f.LastStreamID)) - return - } - select { - case <-t.goAway: - id := t.goAwayID - // t.goAway has been closed (i.e.,multiple GoAways). - if id < f.LastStreamID { - t.mu.Unlock() - t.notifyError(connectionErrorf(true, nil, "received illegal http2 GOAWAY frame: previously recv GOAWAY frame with LastStramID %d, currently recv %d", id, f.LastStreamID)) - return - } - t.prevGoAwayID = id - t.goAwayID = f.LastStreamID - t.mu.Unlock() - return - default: - } - t.goAwayID = f.LastStreamID - close(t.goAway) - } - t.mu.Unlock() -} - -func (t *http2Client) handleWindowUpdate(f *http2.WindowUpdateFrame) { - id := f.Header().StreamID - incr := f.Increment - if id == 0 { - t.sendQuotaPool.add(int(incr)) - return - } - if s, ok := t.getStream(f); ok { - s.sendQuotaPool.add(int(incr)) - } -} - -// operateHeaders takes action on the decoded headers. -func (t *http2Client) operateHeaders(frame *http2.MetaHeadersFrame) { - s, ok := t.getStream(frame) - if !ok { - return - } - var state decodeState - for _, hf := range frame.Fields { - state.processHeaderField(hf) - } - if state.err != nil { - s.mu.Lock() - if !s.headerDone { - close(s.headerChan) - s.headerDone = true - } - s.mu.Unlock() - s.write(recvMsg{err: state.err}) - // Something wrong. Stops reading even when there is remaining. - return - } - - endStream := frame.StreamEnded() - - s.mu.Lock() - if !endStream { - s.recvCompress = state.encoding - } - if !s.headerDone { - if !endStream && len(state.mdata) > 0 { - s.header = state.mdata - } - close(s.headerChan) - s.headerDone = true - } - if !endStream || s.state == streamDone { - s.mu.Unlock() - return - } - - if len(state.mdata) > 0 { - s.trailer = state.mdata - } - s.statusCode = state.statusCode - s.statusDesc = state.statusDesc - close(s.done) - s.state = streamDone - s.mu.Unlock() - s.write(recvMsg{err: io.EOF}) -} - -func handleMalformedHTTP2(s *Stream, err error) { - s.mu.Lock() - if !s.headerDone { - close(s.headerChan) - s.headerDone = true - } - s.mu.Unlock() - s.write(recvMsg{err: err}) -} - -// 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() { - // Check the validity of server preface. - frame, err := t.framer.readFrame() - if err != nil { - t.notifyError(err) - return - } - sf, ok := frame.(*http2.SettingsFrame) - if !ok { - t.notifyError(err) - return - } - t.handleSettings(sf) - - // loop to keep reading incoming messages on this transport. - for { - frame, err := t.framer.readFrame() - 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 - handleMalformedHTTP2(s, streamErrorf(http2ErrConvTab[se.Code], "%v", t.framer.errorDetail())) - } - continue - } else { - // Transport error. - t.notifyError(err) - 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) - case *http2.PingFrame: - t.handlePing(frame) - case *http2.GoAwayFrame: - t.handleGoAway(frame) - case *http2.WindowUpdateFrame: - t.handleWindowUpdate(frame) - default: - grpclog.Printf("transport: http2Client.reader got unhandled frame type %v.", frame) - } - } -} - -func (t *http2Client) applySettings(ss []http2.Setting) { - for _, s := range ss { - switch s.ID { - case http2.SettingMaxConcurrentStreams: - // TODO(zhaoq): This is a hack to avoid significant refactoring of the - // code to deal with the unrealistic int32 overflow. Probably will try - // to find a better way to handle this later. - if s.Val > math.MaxInt32 { - s.Val = math.MaxInt32 - } - t.mu.Lock() - reset := t.streamsQuota != nil - if !reset { - t.streamsQuota = newQuotaPool(int(s.Val) - len(t.activeStreams)) - } - ms := t.maxStreams - t.maxStreams = int(s.Val) - t.mu.Unlock() - if reset { - t.streamsQuota.reset(int(s.Val) - ms) - } - case http2.SettingInitialWindowSize: - t.mu.Lock() - for _, stream := range t.activeStreams { - // Adjust the sending quota for each stream. - stream.sendQuotaPool.reset(int(s.Val - t.streamSendQuota)) - } - t.streamSendQuota = s.Val - t.mu.Unlock() - } - } -} - -// controller running in a separate goroutine takes charge of sending control -// frames (e.g., window update, reset stream, setting, etc.) to the server. -func (t *http2Client) controller() { - for { - select { - case i := <-t.controlBuf.get(): - t.controlBuf.load() - select { - case <-t.writableChan: - switch i := i.(type) { - case *windowUpdate: - t.framer.writeWindowUpdate(true, i.streamID, i.increment) - case *settings: - if i.ack { - t.framer.writeSettingsAck(true) - t.applySettings(i.ss) - } else { - t.framer.writeSettings(true, i.ss...) - } - case *resetStream: - t.framer.writeRSTStream(true, i.streamID, i.code) - case *flushIO: - t.framer.flushWrite() - case *ping: - t.framer.writePing(true, i.ack, i.data) - default: - grpclog.Printf("transport: http2Client.controller got unexpected item type %v\n", i) - } - t.writableChan <- 0 - continue - case <-t.shutdownChan: - return - } - case <-t.shutdownChan: - return - } - } -} - -func (t *http2Client) Error() <-chan struct{} { - return t.errorChan -} - -func (t *http2Client) GoAway() <-chan struct{} { - return t.goAway -} - -func (t *http2Client) notifyError(err error) { - t.mu.Lock() - // make sure t.errorChan is closed only once. - if t.state == draining { - t.mu.Unlock() - t.Close() - return - } - if t.state == reachable { - t.state = unreachable - close(t.errorChan) - grpclog.Printf("transport: http2Client.notifyError got notified that the client transport was broken %v.", err) - } - t.mu.Unlock() -} diff --git a/vendor/google.golang.org/grpc/transport/http2_server.go b/vendor/google.golang.org/grpc/transport/http2_server.go deleted file mode 100644 index a62fb7c22..000000000 --- a/vendor/google.golang.org/grpc/transport/http2_server.go +++ /dev/null @@ -1,775 +0,0 @@ -/* - * - * Copyright 2014, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -package transport - -import ( - "bytes" - "errors" - "io" - "math" - "net" - "strconv" - "sync" - - "golang.org/x/net/context" - "golang.org/x/net/http2" - "golang.org/x/net/http2/hpack" - "google.golang.org/grpc/codes" - "google.golang.org/grpc/credentials" - "google.golang.org/grpc/grpclog" - "google.golang.org/grpc/metadata" - "google.golang.org/grpc/peer" -) - -// ErrIllegalHeaderWrite indicates that setting header is illegal because of -// the stream's state. -var ErrIllegalHeaderWrite = errors.New("transport: the stream is done or WriteHeader was already called") - -// http2Server implements the ServerTransport interface with HTTP2. -type http2Server struct { - conn net.Conn - maxStreamID uint32 // max stream ID ever seen - authInfo credentials.AuthInfo // auth info about the connection - // writableChan synchronizes write access to the transport. - // A writer acquires the write lock by receiving a value on writableChan - // and releases it by sending on writableChan. - writableChan chan int - // shutdownChan is closed when Close is called. - // Blocking operations should select on shutdownChan to avoid - // blocking forever after Close. - shutdownChan chan struct{} - framer *framer - hBuf *bytes.Buffer // the buffer for HPACK encoding - hEnc *hpack.Encoder // HPACK encoder - - // 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 *recvBuffer - fc *inFlow - // sendQuotaPool provides flow control to outbound message. - sendQuotaPool *quotaPool - - mu sync.Mutex // guard the following - state transportState - activeStreams map[uint32]*Stream - // the per-stream outbound flow control window size set by the peer. - streamSendQuota uint32 -} - -// newHTTP2Server constructs a ServerTransport based on HTTP2. ConnectionError is -// returned if something goes wrong. -func newHTTP2Server(conn net.Conn, maxStreams uint32, authInfo credentials.AuthInfo) (_ ServerTransport, err error) { - framer := newFramer(conn) - // Send initial settings as connection preface to client. - var settings []http2.Setting - // TODO(zhaoq): Have a better way to signal "no limit" because 0 is - // permitted in the HTTP2 spec. - if maxStreams == 0 { - maxStreams = math.MaxUint32 - } else { - settings = append(settings, http2.Setting{ - ID: http2.SettingMaxConcurrentStreams, - Val: maxStreams, - }) - } - if initialWindowSize != defaultWindowSize { - settings = append(settings, http2.Setting{ - ID: http2.SettingInitialWindowSize, - Val: uint32(initialWindowSize)}) - } - if err := framer.writeSettings(true, settings...); err != nil { - return nil, connectionErrorf(true, err, "transport: %v", err) - } - // Adjust the connection flow control window if needed. - if delta := uint32(initialConnWindowSize - defaultWindowSize); delta > 0 { - if err := framer.writeWindowUpdate(true, 0, delta); err != nil { - return nil, connectionErrorf(true, err, "transport: %v", err) - } - } - var buf bytes.Buffer - t := &http2Server{ - conn: conn, - authInfo: authInfo, - framer: framer, - hBuf: &buf, - hEnc: hpack.NewEncoder(&buf), - maxStreams: maxStreams, - controlBuf: newRecvBuffer(), - fc: &inFlow{limit: initialConnWindowSize}, - sendQuotaPool: newQuotaPool(defaultWindowSize), - state: reachable, - writableChan: make(chan int, 1), - shutdownChan: make(chan struct{}), - activeStreams: make(map[uint32]*Stream), - streamSendQuota: defaultWindowSize, - } - go t.controller() - t.writableChan <- 0 - return t, nil -} - -// operateHeader takes action on the decoded headers. -func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(*Stream)) (close bool) { - buf := newRecvBuffer() - s := &Stream{ - id: frame.Header().StreamID, - st: t, - buf: buf, - fc: &inFlow{limit: initialWindowSize}, - } - - var state decodeState - for _, hf := range frame.Fields { - state.processHeaderField(hf) - } - if err := state.err; err != nil { - if se, ok := err.(StreamError); ok { - t.controlBuf.put(&resetStream{s.id, statusCodeConvTab[se.Code]}) - } - return - } - - if frame.StreamEnded() { - // s is just created by the caller. No lock needed. - s.state = streamReadDone - } - s.recvCompress = state.encoding - if state.timeoutSet { - s.ctx, s.cancel = context.WithTimeout(context.TODO(), state.timeout) - } else { - s.ctx, s.cancel = context.WithCancel(context.TODO()) - } - pr := &peer.Peer{ - Addr: t.conn.RemoteAddr(), - } - // Attach Auth info if there is any. - if t.authInfo != nil { - pr.AuthInfo = t.authInfo - } - s.ctx = peer.NewContext(s.ctx, pr) - // Cache the current stream to the context so that the server application - // can find out. Required when the server wants to send some metadata - // back to the client (unary call only). - s.ctx = newContextWithStream(s.ctx, s) - // Attach the received metadata to the context. - if len(state.mdata) > 0 { - s.ctx = metadata.NewContext(s.ctx, state.mdata) - } - - s.dec = &recvBufferReader{ - ctx: s.ctx, - recv: s.buf, - } - s.recvCompress = state.encoding - s.method = state.method - t.mu.Lock() - if t.state != reachable { - t.mu.Unlock() - return - } - if uint32(len(t.activeStreams)) >= t.maxStreams { - t.mu.Unlock() - t.controlBuf.put(&resetStream{s.id, http2.ErrCodeRefusedStream}) - return - } - if s.id%2 != 1 || s.id <= t.maxStreamID { - t.mu.Unlock() - // illegal gRPC stream id. - grpclog.Println("transport: http2Server.HandleStreams received an illegal stream id: ", s.id) - return true - } - t.maxStreamID = s.id - s.sendQuotaPool = newQuotaPool(int(t.streamSendQuota)) - t.activeStreams[s.id] = s - t.mu.Unlock() - s.windowHandler = func(n int) { - t.updateWindow(s, uint32(n)) - } - handle(s) - return -} - -// HandleStreams receives incoming streams using the given handler. This is -// typically run in a separate goroutine. -func (t *http2Server) HandleStreams(handle func(*Stream)) { - // Check the validity of client preface. - preface := make([]byte, len(clientPreface)) - if _, err := io.ReadFull(t.conn, preface); err != nil { - grpclog.Printf("transport: http2Server.HandleStreams failed to receive the preface from client: %v", err) - t.Close() - return - } - if !bytes.Equal(preface, clientPreface) { - grpclog.Printf("transport: http2Server.HandleStreams received bogus greeting from client: %q", preface) - t.Close() - return - } - - frame, err := t.framer.readFrame() - if err == io.EOF || err == io.ErrUnexpectedEOF { - t.Close() - return - } - if err != nil { - grpclog.Printf("transport: http2Server.HandleStreams failed to read frame: %v", err) - t.Close() - return - } - sf, ok := frame.(*http2.SettingsFrame) - if !ok { - grpclog.Printf("transport: http2Server.HandleStreams saw invalid preface type %T from client", frame) - t.Close() - return - } - t.handleSettings(sf) - - for { - frame, err := t.framer.readFrame() - if err != nil { - if se, ok := err.(http2.StreamError); ok { - t.mu.Lock() - s := t.activeStreams[se.StreamID] - t.mu.Unlock() - if s != nil { - t.closeStream(s) - } - t.controlBuf.put(&resetStream{se.StreamID, se.Code}) - continue - } - if err == io.EOF || err == io.ErrUnexpectedEOF { - t.Close() - return - } - grpclog.Printf("transport: http2Server.HandleStreams failed to read frame: %v", err) - t.Close() - return - } - switch frame := frame.(type) { - case *http2.MetaHeadersFrame: - if t.operateHeaders(frame, handle) { - 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: - grpclog.Printf("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 -} - -// 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) { - s.mu.Lock() - defer s.mu.Unlock() - if s.state == streamDone { - return - } - if w := t.fc.onRead(n); w > 0 { - t.controlBuf.put(&windowUpdate{0, w}) - } - if w := s.fc.onRead(n); w > 0 { - t.controlBuf.put(&windowUpdate{s.id, w}) - } -} - -func (t *http2Server) handleData(f *http2.DataFrame) { - size := len(f.Data()) - if err := t.fc.onData(uint32(size)); err != nil { - grpclog.Printf("transport: http2Server %v", err) - t.Close() - return - } - // Select the right stream to dispatch. - s, ok := t.getStream(f) - if !ok { - if w := t.fc.onRead(uint32(size)); w > 0 { - t.controlBuf.put(&windowUpdate{0, w}) - } - return - } - if size > 0 { - s.mu.Lock() - if s.state == streamDone { - s.mu.Unlock() - // The stream has been closed. Release the corresponding quota. - if w := t.fc.onRead(uint32(size)); w > 0 { - t.controlBuf.put(&windowUpdate{0, w}) - } - return - } - if err := s.fc.onData(uint32(size)); err != nil { - s.mu.Unlock() - t.closeStream(s) - t.controlBuf.put(&resetStream{s.id, http2.ErrCodeFlowControl}) - return - } - s.mu.Unlock() - // 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? - data := make([]byte, size) - copy(data, f.Data()) - s.write(recvMsg{data: data}) - } - if f.Header().Flags.Has(http2.FlagDataEndStream) { - // Received the end of stream from the client. - s.mu.Lock() - if s.state != streamDone { - s.state = streamReadDone - } - s.mu.Unlock() - s.write(recvMsg{err: io.EOF}) - } -} - -func (t *http2Server) handleRSTStream(f *http2.RSTStreamFrame) { - s, ok := t.getStream(f) - if !ok { - return - } - t.closeStream(s) -} - -func (t *http2Server) handleSettings(f *http2.SettingsFrame) { - if f.IsAck() { - return - } - var ss []http2.Setting - f.ForeachSetting(func(s http2.Setting) error { - ss = append(ss, s) - return nil - }) - // The settings will be applied once the ack is sent. - t.controlBuf.put(&settings{ack: true, ss: ss}) -} - -func (t *http2Server) handlePing(f *http2.PingFrame) { - if f.IsAck() { // Do nothing. - return - } - pingAck := &ping{ack: true} - copy(pingAck.data[:], f.Data[:]) - t.controlBuf.put(pingAck) -} - -func (t *http2Server) handleWindowUpdate(f *http2.WindowUpdateFrame) { - id := f.Header().StreamID - incr := f.Increment - if id == 0 { - t.sendQuotaPool.add(int(incr)) - return - } - if s, ok := t.getStream(f); ok { - s.sendQuotaPool.add(int(incr)) - } -} - -func (t *http2Server) writeHeaders(s *Stream, b *bytes.Buffer, endStream bool) error { - first := true - endHeaders := false - var err error - // Sends the headers in a single batch. - for !endHeaders { - size := t.hBuf.Len() - if size > http2MaxFrameLen { - size = http2MaxFrameLen - } else { - endHeaders = true - } - if first { - p := http2.HeadersFrameParam{ - StreamID: s.id, - BlockFragment: b.Next(size), - EndStream: endStream, - EndHeaders: endHeaders, - } - err = t.framer.writeHeaders(endHeaders, p) - first = false - } else { - err = t.framer.writeContinuation(endHeaders, s.id, endHeaders, b.Next(size)) - } - if err != nil { - t.Close() - return connectionErrorf(true, err, "transport: %v", err) - } - } - return nil -} - -// WriteHeader sends the header metedata md back to the client. -func (t *http2Server) WriteHeader(s *Stream, md metadata.MD) error { - s.mu.Lock() - if s.headerOk || s.state == streamDone { - s.mu.Unlock() - return ErrIllegalHeaderWrite - } - s.headerOk = true - if md.Len() > 0 { - if s.header.Len() > 0 { - s.header = metadata.Join(s.header, md) - } else { - s.header = md - } - } - md = s.header - s.mu.Unlock() - if _, err := wait(s.ctx, nil, nil, t.shutdownChan, t.writableChan); err != nil { - return err - } - t.hBuf.Reset() - t.hEnc.WriteField(hpack.HeaderField{Name: ":status", Value: "200"}) - t.hEnc.WriteField(hpack.HeaderField{Name: "content-type", Value: "application/grpc"}) - if s.sendCompress != "" { - t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-encoding", Value: s.sendCompress}) - } - for k, v := range md { - if isReservedHeader(k) { - // Clients don't tolerate reading restricted headers after some non restricted ones were sent. - continue - } - for _, entry := range v { - t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: entry}) - } - } - if err := t.writeHeaders(s, t.hBuf, false); err != nil { - return err - } - t.writableChan <- 0 - 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, statusCode codes.Code, statusDesc string) error { - var headersSent, hasHeader bool - s.mu.Lock() - if s.state == streamDone { - s.mu.Unlock() - return nil - } - if s.headerOk { - headersSent = true - } - if s.header.Len() > 0 { - hasHeader = true - } - s.mu.Unlock() - - if !headersSent && hasHeader { - t.WriteHeader(s, nil) - headersSent = true - } - - if _, err := wait(s.ctx, nil, nil, t.shutdownChan, t.writableChan); err != nil { - return err - } - t.hBuf.Reset() - if !headersSent { - t.hEnc.WriteField(hpack.HeaderField{Name: ":status", Value: "200"}) - t.hEnc.WriteField(hpack.HeaderField{Name: "content-type", Value: "application/grpc"}) - } - t.hEnc.WriteField( - hpack.HeaderField{ - Name: "grpc-status", - Value: strconv.Itoa(int(statusCode)), - }) - t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-message", Value: encodeGrpcMessage(statusDesc)}) - // Attach the trailer metadata. - for k, v := range s.trailer { - // Clients don't tolerate reading restricted headers after some non restricted ones were sent. - if isReservedHeader(k) { - continue - } - for _, entry := range v { - t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: entry}) - } - } - if err := t.writeHeaders(s, t.hBuf, true); err != nil { - t.Close() - return err - } - t.closeStream(s) - t.writableChan <- 0 - 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, data []byte, opts *Options) error { - // TODO(zhaoq): Support multi-writers for a single stream. - var writeHeaderFrame bool - s.mu.Lock() - if s.state == streamDone { - s.mu.Unlock() - return streamErrorf(codes.Unknown, "the stream has been done") - } - if !s.headerOk { - writeHeaderFrame = true - } - s.mu.Unlock() - if writeHeaderFrame { - t.WriteHeader(s, nil) - } - r := bytes.NewBuffer(data) - for { - if r.Len() == 0 { - return nil - } - size := http2MaxFrameLen - s.sendQuotaPool.add(0) - // Wait until the stream has some quota to send the data. - sq, err := wait(s.ctx, nil, nil, t.shutdownChan, s.sendQuotaPool.acquire()) - if err != nil { - return err - } - t.sendQuotaPool.add(0) - // Wait until the transport has some quota to send the data. - tq, err := wait(s.ctx, nil, nil, t.shutdownChan, t.sendQuotaPool.acquire()) - if err != nil { - if _, ok := err.(StreamError); ok { - t.sendQuotaPool.cancel() - } - return err - } - if sq < size { - size = sq - } - if tq < size { - size = tq - } - p := r.Next(size) - ps := len(p) - if ps < sq { - // Overbooked stream quota. Return it back. - s.sendQuotaPool.add(sq - ps) - } - if ps < tq { - // Overbooked transport quota. Return it back. - t.sendQuotaPool.add(tq - ps) - } - t.framer.adjustNumWriters(1) - // Got some quota. Try to acquire writing privilege on the - // transport. - if _, err := wait(s.ctx, nil, nil, t.shutdownChan, t.writableChan); err != nil { - if _, ok := err.(StreamError); ok { - // Return the connection quota back. - t.sendQuotaPool.add(ps) - } - if t.framer.adjustNumWriters(-1) == 0 { - // This writer is the last one in this batch and has the - // responsibility to flush the buffered frames. It queues - // a flush request to controlBuf instead of flushing directly - // in order to avoid the race with other writing or flushing. - t.controlBuf.put(&flushIO{}) - } - return err - } - select { - case <-s.ctx.Done(): - t.sendQuotaPool.add(ps) - if t.framer.adjustNumWriters(-1) == 0 { - t.controlBuf.put(&flushIO{}) - } - t.writableChan <- 0 - return ContextErr(s.ctx.Err()) - default: - } - var forceFlush bool - if r.Len() == 0 && t.framer.adjustNumWriters(0) == 1 && !opts.Last { - forceFlush = true - } - if err := t.framer.writeData(forceFlush, s.id, false, p); err != nil { - t.Close() - return connectionErrorf(true, err, "transport: %v", err) - } - if t.framer.adjustNumWriters(-1) == 0 { - t.framer.flushWrite() - } - t.writableChan <- 0 - } - -} - -func (t *http2Server) applySettings(ss []http2.Setting) { - for _, s := range ss { - if s.ID == http2.SettingInitialWindowSize { - t.mu.Lock() - defer t.mu.Unlock() - for _, stream := range t.activeStreams { - stream.sendQuotaPool.reset(int(s.Val - t.streamSendQuota)) - } - t.streamSendQuota = s.Val - } - - } -} - -// controller running in a separate goroutine takes charge of sending control -// frames (e.g., window update, reset stream, setting, etc.) to the server. -func (t *http2Server) controller() { - for { - select { - case i := <-t.controlBuf.get(): - t.controlBuf.load() - select { - case <-t.writableChan: - switch i := i.(type) { - case *windowUpdate: - t.framer.writeWindowUpdate(true, i.streamID, i.increment) - case *settings: - if i.ack { - t.framer.writeSettingsAck(true) - t.applySettings(i.ss) - } else { - t.framer.writeSettings(true, i.ss...) - } - case *resetStream: - t.framer.writeRSTStream(true, i.streamID, i.code) - case *goAway: - t.mu.Lock() - if t.state == closing { - t.mu.Unlock() - // The transport is closing. - return - } - sid := t.maxStreamID - t.state = draining - t.mu.Unlock() - t.framer.writeGoAway(true, sid, http2.ErrCodeNo, nil) - case *flushIO: - t.framer.flushWrite() - case *ping: - t.framer.writePing(true, i.ack, i.data) - default: - grpclog.Printf("transport: http2Server.controller got unexpected item type %v\n", i) - } - t.writableChan <- 0 - continue - case <-t.shutdownChan: - return - } - case <-t.shutdownChan: - 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() (err 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() - close(t.shutdownChan) - err = t.conn.Close() - // Cancel all active streams. - for _, s := range streams { - s.cancel() - } - return -} - -// closeStream clears the footprint of a stream when the stream is not needed -// any more. -func (t *http2Server) closeStream(s *Stream) { - t.mu.Lock() - delete(t.activeStreams, s.id) - if t.state == draining && len(t.activeStreams) == 0 { - defer t.Close() - } - t.mu.Unlock() - // 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() - s.mu.Lock() - if q := s.fc.resetPendingData(); q > 0 { - if w := t.fc.onRead(q); w > 0 { - t.controlBuf.put(&windowUpdate{0, w}) - } - } - if s.state == streamDone { - s.mu.Unlock() - return - } - s.state = streamDone - s.mu.Unlock() -} - -func (t *http2Server) RemoteAddr() net.Addr { - return t.conn.RemoteAddr() -} - -func (t *http2Server) Drain() { - t.controlBuf.put(&goAway{}) -} diff --git a/vendor/google.golang.org/grpc/transport/http_util.go b/vendor/google.golang.org/grpc/transport/http_util.go deleted file mode 100644 index a3c68d4ca..000000000 --- a/vendor/google.golang.org/grpc/transport/http_util.go +++ /dev/null @@ -1,513 +0,0 @@ -/* - * - * Copyright 2014, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -package transport - -import ( - "bufio" - "bytes" - "fmt" - "io" - "net" - "strconv" - "strings" - "sync/atomic" - "time" - - "golang.org/x/net/http2" - "golang.org/x/net/http2/hpack" - "google.golang.org/grpc/codes" - "google.golang.org/grpc/grpclog" - "google.golang.org/grpc/metadata" -) - -const ( - // The primary user agent - primaryUA = "grpc-go/1.0" - // http2MaxFrameLen specifies the max length of a HTTP2 frame. - http2MaxFrameLen = 16384 // 16KB frame - // http://http2.github.io/http2-spec/#SettingValues - http2InitHeaderTableSize = 4096 - // http2IOBufSize specifies the buffer size for sending frames. - http2IOBufSize = 32 * 1024 -) - -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.FailedPrecondition, - } - statusCodeConvTab = map[codes.Code]http2.ErrCode{ - codes.Internal: http2.ErrCodeInternal, - codes.Canceled: http2.ErrCodeCancel, - codes.Unavailable: http2.ErrCodeRefusedStream, - codes.ResourceExhausted: http2.ErrCodeEnhanceYourCalm, - codes.PermissionDenied: http2.ErrCodeInadequateSecurity, - } -) - -// Records the states during HPACK decoding. Must be reset once the -// decoding of the entire headers are finished. -type decodeState struct { - err error // first error encountered decoding - - encoding string - // statusCode caches the stream status received from the trailer - // the server sent. Client side only. - statusCode codes.Code - statusDesc string - // Server side only fields. - timeoutSet bool - timeout time.Duration - method string - // key-value metadata map from the peer. - mdata map[string][]string -} - -// 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", - "grpc-message-type", - "grpc-encoding", - "grpc-message", - "grpc-status", - "grpc-timeout", - "te": - return true - default: - return false - } -} - -// isWhitelistedPseudoHeader checks whether hdr belongs to HTTP2 pseudoheaders -// that should be propagated into metadata visible to users. -func isWhitelistedPseudoHeader(hdr string) bool { - switch hdr { - case ":authority": - return true - default: - return false - } -} - -func (d *decodeState) setErr(err error) { - if d.err == nil { - d.err = err - } -} - -func validContentType(t string) bool { - e := "application/grpc" - if !strings.HasPrefix(t, e) { - return false - } - // Support variations on the content-type - // (e.g. "application/grpc+blah", "application/grpc;blah"). - if len(t) > len(e) && t[len(e)] != '+' && t[len(e)] != ';' { - return false - } - return true -} - -func (d *decodeState) processHeaderField(f hpack.HeaderField) { - switch f.Name { - case "content-type": - if !validContentType(f.Value) { - d.setErr(streamErrorf(codes.FailedPrecondition, "transport: received the unexpected content-type %q", f.Value)) - return - } - case "grpc-encoding": - d.encoding = f.Value - case "grpc-status": - code, err := strconv.Atoi(f.Value) - if err != nil { - d.setErr(streamErrorf(codes.Internal, "transport: malformed grpc-status: %v", err)) - return - } - d.statusCode = codes.Code(code) - case "grpc-message": - d.statusDesc = decodeGrpcMessage(f.Value) - case "grpc-timeout": - d.timeoutSet = true - var err error - d.timeout, err = decodeTimeout(f.Value) - if err != nil { - d.setErr(streamErrorf(codes.Internal, "transport: malformed time-out: %v", err)) - return - } - case ":path": - d.method = f.Value - default: - if !isReservedHeader(f.Name) || isWhitelistedPseudoHeader(f.Name) { - if f.Name == "user-agent" { - i := strings.LastIndex(f.Value, " ") - if i == -1 { - // There is no application user agent string being set. - return - } - // Extract the application user agent string. - f.Value = f.Value[:i] - } - if d.mdata == nil { - d.mdata = make(map[string][]string) - } - k, v, err := metadata.DecodeKeyValue(f.Name, f.Value) - if err != nil { - grpclog.Printf("Failed to decode (%q, %q): %v", f.Name, f.Value, err) - return - } - d.mdata[k] = append(d.mdata[k], 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 -} - -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 m := d % r; m > 0 { - return int64(d/r + 1) - } - return int64(d / r) -} - -// TODO(zhaoq): It is the simplistic and not bandwidth efficient. Improve it. -func encodeTimeout(t time.Duration) string { - 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" -} - -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) - } - 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 - } - return d * time.Duration(t), nil -} - -const ( - spaceByte = ' ' - tildaByte = '~' - percentByte = '%' -) - -// encodeGrpcMessage is used to encode status code in header field -// "grpc-message". -// 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 < tildaByte && c != percentByte) { - return encodeGrpcMessageUnchecked(msg) - } - } - return msg -} - -func encodeGrpcMessageUnchecked(msg string) string { - var buf bytes.Buffer - lenMsg := len(msg) - for i := 0; i < lenMsg; i++ { - c := msg[i] - if c >= spaceByte && c < tildaByte && c != percentByte { - buf.WriteByte(c) - } else { - buf.WriteString(fmt.Sprintf("%%%02X", c)) - } - } - 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 framer struct { - numWriters int32 - reader io.Reader - writer *bufio.Writer - fr *http2.Framer -} - -func newFramer(conn net.Conn) *framer { - f := &framer{ - reader: bufio.NewReaderSize(conn, http2IOBufSize), - writer: bufio.NewWriterSize(conn, http2IOBufSize), - } - f.fr = http2.NewFramer(f.writer, f.reader) - f.fr.ReadMetaHeaders = hpack.NewDecoder(http2InitHeaderTableSize, nil) - return f -} - -func (f *framer) adjustNumWriters(i int32) int32 { - return atomic.AddInt32(&f.numWriters, i) -} - -// The following writeXXX functions can only be called when the caller gets -// unblocked from writableChan channel (i.e., owns the privilege to write). - -func (f *framer) writeContinuation(forceFlush bool, streamID uint32, endHeaders bool, headerBlockFragment []byte) error { - if err := f.fr.WriteContinuation(streamID, endHeaders, headerBlockFragment); err != nil { - return err - } - if forceFlush { - return f.writer.Flush() - } - return nil -} - -func (f *framer) writeData(forceFlush bool, streamID uint32, endStream bool, data []byte) error { - if err := f.fr.WriteData(streamID, endStream, data); err != nil { - return err - } - if forceFlush { - return f.writer.Flush() - } - return nil -} - -func (f *framer) writeGoAway(forceFlush bool, maxStreamID uint32, code http2.ErrCode, debugData []byte) error { - if err := f.fr.WriteGoAway(maxStreamID, code, debugData); err != nil { - return err - } - if forceFlush { - return f.writer.Flush() - } - return nil -} - -func (f *framer) writeHeaders(forceFlush bool, p http2.HeadersFrameParam) error { - if err := f.fr.WriteHeaders(p); err != nil { - return err - } - if forceFlush { - return f.writer.Flush() - } - return nil -} - -func (f *framer) writePing(forceFlush, ack bool, data [8]byte) error { - if err := f.fr.WritePing(ack, data); err != nil { - return err - } - if forceFlush { - return f.writer.Flush() - } - return nil -} - -func (f *framer) writePriority(forceFlush bool, streamID uint32, p http2.PriorityParam) error { - if err := f.fr.WritePriority(streamID, p); err != nil { - return err - } - if forceFlush { - return f.writer.Flush() - } - return nil -} - -func (f *framer) writePushPromise(forceFlush bool, p http2.PushPromiseParam) error { - if err := f.fr.WritePushPromise(p); err != nil { - return err - } - if forceFlush { - return f.writer.Flush() - } - return nil -} - -func (f *framer) writeRSTStream(forceFlush bool, streamID uint32, code http2.ErrCode) error { - if err := f.fr.WriteRSTStream(streamID, code); err != nil { - return err - } - if forceFlush { - return f.writer.Flush() - } - return nil -} - -func (f *framer) writeSettings(forceFlush bool, settings ...http2.Setting) error { - if err := f.fr.WriteSettings(settings...); err != nil { - return err - } - if forceFlush { - return f.writer.Flush() - } - return nil -} - -func (f *framer) writeSettingsAck(forceFlush bool) error { - if err := f.fr.WriteSettingsAck(); err != nil { - return err - } - if forceFlush { - return f.writer.Flush() - } - return nil -} - -func (f *framer) writeWindowUpdate(forceFlush bool, streamID, incr uint32) error { - if err := f.fr.WriteWindowUpdate(streamID, incr); err != nil { - return err - } - if forceFlush { - return f.writer.Flush() - } - return nil -} - -func (f *framer) flushWrite() error { - return f.writer.Flush() -} - -func (f *framer) readFrame() (http2.Frame, error) { - return f.fr.ReadFrame() -} - -func (f *framer) errorDetail() error { - return f.fr.ErrorDetail() -} diff --git a/vendor/google.golang.org/grpc/transport/pre_go16.go b/vendor/google.golang.org/grpc/transport/pre_go16.go deleted file mode 100644 index 33d91c17c..000000000 --- a/vendor/google.golang.org/grpc/transport/pre_go16.go +++ /dev/null @@ -1,51 +0,0 @@ -// +build !go1.6 - -/* - * Copyright 2016, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -package transport - -import ( - "net" - "time" - - "golang.org/x/net/context" -) - -// dialContext connects to the address on the named network. -func dialContext(ctx context.Context, network, address string) (net.Conn, error) { - var dialer net.Dialer - if deadline, ok := ctx.Deadline(); ok { - dialer.Timeout = deadline.Sub(time.Now()) - } - return dialer.Dial(network, address) -} diff --git a/vendor/google.golang.org/grpc/transport/transport.go b/vendor/google.golang.org/grpc/transport/transport.go deleted file mode 100644 index 413f7493b..000000000 --- a/vendor/google.golang.org/grpc/transport/transport.go +++ /dev/null @@ -1,595 +0,0 @@ -/* - * - * Copyright 2014, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -/* -Package transport defines and implements message oriented communication channel -to complete various transactions (e.g., an RPC). -*/ -package transport // import "google.golang.org/grpc/transport" - -import ( - "bytes" - "fmt" - "io" - "net" - "sync" - - "golang.org/x/net/context" - "golang.org/x/net/trace" - "google.golang.org/grpc/codes" - "google.golang.org/grpc/credentials" - "google.golang.org/grpc/metadata" -) - -// recvMsg represents the received msg from the transport. All transport -// protocol specific info has been removed. -type recvMsg struct { - data []byte - // nil: received some data - // io.EOF: stream is completed. data is nil. - // other non-nil error: transport failure. data is nil. - err error -} - -func (*recvMsg) item() {} - -// All items in an out of a recvBuffer should be the same type. -type item interface { - item() -} - -// recvBuffer is an unbounded channel of item. -type recvBuffer struct { - c chan item - mu sync.Mutex - backlog []item -} - -func newRecvBuffer() *recvBuffer { - b := &recvBuffer{ - c: make(chan item, 1), - } - return b -} - -func (b *recvBuffer) put(r item) { - b.mu.Lock() - defer b.mu.Unlock() - if len(b.backlog) == 0 { - select { - case b.c <- r: - return - default: - } - } - b.backlog = append(b.backlog, r) -} - -func (b *recvBuffer) load() { - b.mu.Lock() - defer b.mu.Unlock() - if len(b.backlog) > 0 { - select { - case b.c <- b.backlog[0]: - b.backlog = b.backlog[1:] - default: - } - } -} - -// get returns the channel that receives an item in the buffer. -// -// Upon receipt of an item, the caller should call load to send another -// item onto the channel if there is any. -func (b *recvBuffer) get() <-chan item { - return b.c -} - -// recvBufferReader implements io.Reader interface to read the data from -// recvBuffer. -type recvBufferReader struct { - ctx context.Context - goAway chan struct{} - recv *recvBuffer - last *bytes.Reader // Stores the remaining data in the previous calls. - err error -} - -// 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 - } - defer func() { r.err = err }() - if r.last != nil && r.last.Len() > 0 { - // Read remaining data left in last call. - return r.last.Read(p) - } - select { - case <-r.ctx.Done(): - return 0, ContextErr(r.ctx.Err()) - case <-r.goAway: - return 0, ErrStreamDrain - case i := <-r.recv.get(): - r.recv.load() - m := i.(*recvMsg) - if m.err != nil { - return 0, m.err - } - r.last = bytes.NewReader(m.data) - return r.last.Read(p) - } -} - -type streamState uint8 - -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 - // nil for client side Stream. - st ServerTransport - // ctx is the associated context of the stream. - ctx context.Context - // cancel is always nil for client side Stream. - cancel context.CancelFunc - // done is closed when the final status arrives. - done chan struct{} - // goAway is closed when the server sent GoAways signal before this stream was initiated. - goAway chan struct{} - // method records the associated RPC method of the stream. - method string - recvCompress string - sendCompress string - buf *recvBuffer - dec io.Reader - fc *inFlow - recvQuota uint32 - // The accumulated inbound quota pending for window update. - updateQuota uint32 - // The handler to control the window update procedure for both this - // particular stream and the associated transport. - windowHandler func(int) - - sendQuotaPool *quotaPool - // Close headerChan to indicate the end of reception of header metadata. - headerChan chan struct{} - // header caches the received header metadata. - header metadata.MD - // The key-value map of trailer metadata. - trailer metadata.MD - - mu sync.RWMutex // guard the following - // headerOK becomes true from the first header is about to send. - headerOk bool - state streamState - // true iff headerChan is closed. Used to avoid closing headerChan - // multiple times. - headerDone bool - // the status received from the server. - statusCode codes.Code - statusDesc string -} - -// 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 { - return s.recvCompress -} - -// SetSendCompress sets the compression algorithm to the stream. -func (s *Stream) SetSendCompress(str string) { - s.sendCompress = str -} - -// Done returns a chanel which is closed when it receives the final status -// from the server. -func (s *Stream) Done() <-chan struct{} { - return s.done -} - -// GoAway returns a channel which is closed when the server sent GoAways signal -// before this stream was initiated. -func (s *Stream) GoAway() <-chan struct{} { - return s.goAway -} - -// Header 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 cancelled/expired. -func (s *Stream) Header() (metadata.MD, error) { - select { - case <-s.ctx.Done(): - return nil, ContextErr(s.ctx.Err()) - case <-s.goAway: - return nil, ErrStreamDrain - case <-s.headerChan: - return s.header.Copy(), nil - } -} - -// 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. -func (s *Stream) Trailer() metadata.MD { - s.mu.RLock() - defer s.mu.RUnlock() - return s.trailer.Copy() -} - -// ServerTransport returns the underlying ServerTransport for the stream. -// The client side stream always returns nil. -func (s *Stream) ServerTransport() ServerTransport { - return s.st -} - -// Context returns the context of the stream. -func (s *Stream) Context() context.Context { - return s.ctx -} - -// TraceContext recreates the context of s with a trace.Trace. -func (s *Stream) TraceContext(tr trace.Trace) { - s.ctx = trace.NewContext(s.ctx, tr) -} - -// Method returns the method for the stream. -func (s *Stream) Method() string { - return s.method -} - -// StatusCode returns statusCode received from the server. -func (s *Stream) StatusCode() codes.Code { - return s.statusCode -} - -// StatusDesc returns statusDesc received from the server. -func (s *Stream) StatusDesc() string { - return s.statusDesc -} - -// SetHeader sets the header metadata. This can be called multiple times. -// Server side only. -func (s *Stream) SetHeader(md metadata.MD) error { - s.mu.Lock() - defer s.mu.Unlock() - if s.headerOk || s.state == streamDone { - return ErrIllegalHeaderWrite - } - if md.Len() == 0 { - return nil - } - s.header = metadata.Join(s.header, md) - return nil -} - -// 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. -func (s *Stream) SetTrailer(md metadata.MD) error { - if md.Len() == 0 { - return nil - } - s.mu.Lock() - defer s.mu.Unlock() - s.trailer = metadata.Join(s.trailer, md) - return nil -} - -func (s *Stream) write(m recvMsg) { - s.buf.put(&m) -} - -// Read 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. -func (s *Stream) Read(p []byte) (n int, err error) { - n, err = s.dec.Read(p) - if err != nil { - return - } - s.windowHandler(n) - return -} - -// The key to save transport.Stream in the context. -type streamKey struct{} - -// newContextWithStream creates a new context from ctx and attaches stream -// to it. -func newContextWithStream(ctx context.Context, stream *Stream) context.Context { - return context.WithValue(ctx, streamKey{}, stream) -} - -// StreamFromContext returns the stream saved in ctx. -func StreamFromContext(ctx context.Context) (s *Stream, ok bool) { - s, ok = ctx.Value(streamKey{}).(*Stream) - return -} - -// state of transport -type transportState int - -const ( - reachable transportState = iota - unreachable - closing - draining -) - -// NewServerTransport creates a ServerTransport with conn or non-nil error -// if it fails. -func NewServerTransport(protocol string, conn net.Conn, maxStreams uint32, authInfo credentials.AuthInfo) (ServerTransport, error) { - return newHTTP2Server(conn, maxStreams, authInfo) -} - -// 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) - // PerRPCCredentials stores the PerRPCCredentials required to issue RPCs. - PerRPCCredentials []credentials.PerRPCCredentials - // TransportCredentials stores the Authenticator required to setup a client connection. - TransportCredentials credentials.TransportCredentials -} - -// TargetInfo contains the information of the target such as network address and metadata. -type TargetInfo struct { - Addr string - Metadata interface{} -} - -// NewClientTransport establishes the transport with the required ConnectOptions -// and returns it to the caller. -func NewClientTransport(ctx context.Context, target TargetInfo, opts ConnectOptions) (ClientTransport, error) { - return newHTTP2Client(ctx, target, opts) -} - -// 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 - - // Delay is a hint to the transport implementation for whether - // the data could be buffered for a batching write. The - // Transport implementation may ignore the hint. - Delay 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 - - // RecvCompress specifies the compression algorithm applied on - // inbound messages. - RecvCompress string - - // SendCompress specifies the compression algorithm applied on - // outbound message. - SendCompress string - - // Flush indicates whether a new stream command should be sent - // to the peer without waiting for the first data. This is - // only a hint. The transport may modify the flush decision - // for performance purposes. - Flush bool -} - -// 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. It stops accepting - // new RPCs and wait the completion of the pending RPCs. - GracefulClose() error - - // 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, 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 ClientTranspor - // receives the draining signal from the server (e.g., GOAWAY frame in - // HTTP/2). - GoAway() <-chan struct{} -} - -// 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)) - - // 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, 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, statusCode codes.Code, statusDesc string) 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() -} - -// streamErrorf creates an StreamError with the specified error code and description. -func streamErrorf(c codes.Code, format string, a ...interface{}) StreamError { - return StreamError{ - Code: c, - Desc: fmt.Sprintf(format, a...), - } -} - -// 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 by the server because - // the server stops accepting new RPCs. - ErrStreamDrain = streamErrorf(codes.Unavailable, "the server stops accepting new RPCs") -) - -// StreamError is an error that only affects one stream within a connection. -type StreamError struct { - Code codes.Code - Desc string -} - -func (e StreamError) Error() string { - return fmt.Sprintf("stream error: code = %d desc = %q", e.Code, e.Desc) -} - -// ContextErr converts the error from context package into a StreamError. -func ContextErr(err error) StreamError { - switch err { - case context.DeadlineExceeded: - return streamErrorf(codes.DeadlineExceeded, "%v", err) - case context.Canceled: - return streamErrorf(codes.Canceled, "%v", err) - } - panic(fmt.Sprintf("Unexpected error from context packet: %v", err)) -} - -// wait blocks until it can receive from ctx.Done, closing, or proceed. -// If it receives from ctx.Done, it returns 0, the StreamError for ctx.Err. -// If it receives from done, it returns 0, io.EOF if ctx is not done; otherwise -// it return the StreamError for ctx.Err. -// If it receives from goAway, it returns 0, ErrStreamDrain. -// If it receives from closing, it returns 0, ErrConnClosing. -// If it receives from proceed, it returns the received integer, nil. -func wait(ctx context.Context, done, goAway, closing <-chan struct{}, proceed <-chan int) (int, error) { - select { - case <-ctx.Done(): - return 0, ContextErr(ctx.Err()) - case <-done: - // User cancellation has precedence. - select { - case <-ctx.Done(): - return 0, ContextErr(ctx.Err()) - default: - } - return 0, io.EOF - case <-goAway: - return 0, ErrStreamDrain - case <-closing: - return 0, ErrConnClosing - case i := <-proceed: - return i, nil - } -} |