1// Copyright 2015 The etcd Authors 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15package rafthttp 16 17import ( 18 "errors" 19 "net/http" 20) 21 22func (t *roundTripperBlocker) RoundTrip(req *http.Request) (*http.Response, error) { 23 c := make(chan struct{}, 1) 24 t.mu.Lock() 25 t.cancel[req] = c 26 t.mu.Unlock() 27 ctx := req.Context() 28 select { 29 case <-t.unblockc: 30 return &http.Response{StatusCode: http.StatusNoContent, Body: &nopReadCloser{}}, nil 31 case <-ctx.Done(): 32 return nil, errors.New("request canceled") 33 case <-c: 34 return nil, errors.New("request canceled") 35 } 36} 37