mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
8f6bf029f8
It specifies request timeout error possibly caused by connection lost, and print out better log for user to understand. It handles two cases: 1. the leader cannot connect to majority of cluster. 2. the connection between follower and leader is down for a while, and it losts proposals. log format: ``` 20:04:19 etcd3 | 2015-08-25 20:04:19.368126 E | etcdhttp: etcdserver: request timed out, possibly due to connection lost 20:04:19 etcd3 | 2015-08-25 20:04:19.368227 E | etcdhttp: etcdserver: request timed out, possibly due to connection lost ```
88 lines
2.6 KiB
Go
88 lines
2.6 KiB
Go
// Copyright 2015 CoreOS, Inc.
|
|
//
|
|
// 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 etcdhttp
|
|
|
|
import (
|
|
"errors"
|
|
"math"
|
|
"net/http"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/coreos/etcd/Godeps/_workspace/src/github.com/coreos/pkg/capnslog"
|
|
etcdErr "github.com/coreos/etcd/error"
|
|
"github.com/coreos/etcd/etcdserver"
|
|
"github.com/coreos/etcd/etcdserver/auth"
|
|
"github.com/coreos/etcd/etcdserver/etcdhttp/httptypes"
|
|
)
|
|
|
|
const (
|
|
// time to wait for a Watch request
|
|
defaultWatchTimeout = time.Duration(math.MaxInt64)
|
|
)
|
|
|
|
var (
|
|
plog = capnslog.NewPackageLogger("github.com/coreos/etcd", "etcdhttp")
|
|
errClosed = errors.New("etcdhttp: client closed connection")
|
|
)
|
|
|
|
// writeError logs and writes the given Error to the ResponseWriter
|
|
// If Error is an etcdErr, it is rendered to the ResponseWriter
|
|
// Otherwise, it is assumed to be an InternalServerError
|
|
func writeError(w http.ResponseWriter, err error) {
|
|
if err == nil {
|
|
return
|
|
}
|
|
switch e := err.(type) {
|
|
case *etcdErr.Error:
|
|
e.WriteTo(w)
|
|
case *httptypes.HTTPError:
|
|
e.WriteTo(w)
|
|
case auth.Error:
|
|
herr := httptypes.NewHTTPError(e.HTTPStatus(), e.Error())
|
|
herr.WriteTo(w)
|
|
default:
|
|
switch err {
|
|
case etcdserver.ErrTimeoutDueToLeaderFail, etcdserver.ErrTimeoutDueToConnectionLost:
|
|
plog.Error(err)
|
|
default:
|
|
plog.Errorf("got unexpected response error (%v)", err)
|
|
}
|
|
herr := httptypes.NewHTTPError(http.StatusInternalServerError, "Internal Server Error")
|
|
herr.WriteTo(w)
|
|
}
|
|
}
|
|
|
|
// allowMethod verifies that the given method is one of the allowed methods,
|
|
// and if not, it writes an error to w. A boolean is returned indicating
|
|
// whether or not the method is allowed.
|
|
func allowMethod(w http.ResponseWriter, m string, ms ...string) bool {
|
|
for _, meth := range ms {
|
|
if m == meth {
|
|
return true
|
|
}
|
|
}
|
|
w.Header().Set("Allow", strings.Join(ms, ","))
|
|
http.Error(w, "Method Not Allowed", http.StatusMethodNotAllowed)
|
|
return false
|
|
}
|
|
|
|
func requestLogger(handler http.Handler) http.Handler {
|
|
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
plog.Debugf("[%s] %s remote:%s", r.Method, r.RequestURI, r.RemoteAddr)
|
|
handler.ServeHTTP(w, r)
|
|
})
|
|
}
|