vendor/google.golang.org/grpc/internal/binarylog/util.go

   1 /*
   2  *
   3  * Copyright 2018 gRPC authors.
   4  *
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  *
  17  */
  18
  19 package binarylog
  20
  21 import (
  22         "errors"
  23         "strings"
  24 )
  25
  26 // parseMethodName splits service and method from the input. It expects format
  27 // "/service/method".
  28 //
  29 // TODO: move to internal/grpcutil.
  30 func parseMethodName(methodName string) (service, method string, _ error) {
  31         if !strings.HasPrefix(methodName, "/") {
  32                 return "", "", errors.New("invalid method name: should start with /")
  33         }
  34         methodName = methodName[1:]
  35
  36         pos := strings.LastIndex(methodName, "/")
  37         if pos < 0 {
  38                 return "", "", errors.New("invalid method name: suffix /method is missing")
  39         }
  40         return methodName[:pos], methodName[pos+1:], nil
  41 }