diff options
Diffstat (limited to 'vendor/google.golang.org/grpc/internal/grpcutil/method.go')
-rw-r--r-- | vendor/google.golang.org/grpc/internal/grpcutil/method.go | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/vendor/google.golang.org/grpc/internal/grpcutil/method.go b/vendor/google.golang.org/grpc/internal/grpcutil/method.go new file mode 100644 index 000000000..4e7475060 --- /dev/null +++ b/vendor/google.golang.org/grpc/internal/grpcutil/method.go @@ -0,0 +1,84 @@ +/* + * + * Copyright 2018 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +package grpcutil + +import ( + "errors" + "strings" +) + +// ParseMethod splits service and method from the input. It expects format +// "/service/method". +// +func ParseMethod(methodName string) (service, method string, _ error) { + if !strings.HasPrefix(methodName, "/") { + return "", "", errors.New("invalid method name: should start with /") + } + methodName = methodName[1:] + + pos := strings.LastIndex(methodName, "/") + if pos < 0 { + return "", "", errors.New("invalid method name: suffix /method is missing") + } + return methodName[:pos], methodName[pos+1:], nil +} + +const baseContentType = "application/grpc" + +// ContentSubtype returns the content-subtype for the given content-type. The +// given content-type must be a valid content-type that starts with +// "application/grpc". A content-subtype will follow "application/grpc" after a +// "+" or ";". See +// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests for +// more details. +// +// If contentType is not a valid content-type for gRPC, the boolean +// will be false, otherwise true. If content-type == "application/grpc", +// "application/grpc+", or "application/grpc;", the boolean will be true, +// but no content-subtype will be returned. +// +// contentType is assumed to be lowercase already. +func ContentSubtype(contentType string) (string, bool) { + if contentType == baseContentType { + return "", true + } + if !strings.HasPrefix(contentType, baseContentType) { + return "", false + } + // guaranteed since != baseContentType and has baseContentType prefix + switch contentType[len(baseContentType)] { + case '+', ';': + // this will return true for "application/grpc+" or "application/grpc;" + // which the previous validContentType function tested to be valid, so we + // just say that no content-subtype is specified in this case + return contentType[len(baseContentType)+1:], true + default: + return "", false + } +} + +// ContentType builds full content type with the given sub-type. +// +// contentSubtype is assumed to be lowercase +func ContentType(contentSubtype string) string { + if contentSubtype == "" { + return baseContentType + } + return baseContentType + "+" + contentSubtype +} |