mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
91 lines
2.3 KiB
Go
91 lines
2.3 KiB
Go
/*
|
|
Copyright 2014 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 rafthttp
|
|
|
|
import (
|
|
"io/ioutil"
|
|
"log"
|
|
"net/http"
|
|
|
|
"github.com/coreos/etcd/pkg/types"
|
|
"github.com/coreos/etcd/raft/raftpb"
|
|
|
|
"github.com/coreos/etcd/Godeps/_workspace/src/code.google.com/p/go.net/context"
|
|
)
|
|
|
|
type Processor interface {
|
|
Process(ctx context.Context, m raftpb.Message) error
|
|
}
|
|
|
|
func NewHandler(p Processor, cid types.ID) http.Handler {
|
|
return &handler{
|
|
p: p,
|
|
cid: cid,
|
|
}
|
|
}
|
|
|
|
type handler struct {
|
|
p Processor
|
|
cid types.ID
|
|
}
|
|
|
|
func (h *handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
|
|
if r.Method != "POST" {
|
|
w.Header().Set("Allow", "POST")
|
|
http.Error(w, "Method Not Allowed", http.StatusMethodNotAllowed)
|
|
return
|
|
}
|
|
|
|
wcid := h.cid.String()
|
|
w.Header().Set("X-Etcd-Cluster-ID", wcid)
|
|
|
|
gcid := r.Header.Get("X-Etcd-Cluster-ID")
|
|
if gcid != wcid {
|
|
log.Printf("rafthttp: request ignored due to cluster ID mismatch got %s want %s", gcid, wcid)
|
|
http.Error(w, "clusterID mismatch", http.StatusPreconditionFailed)
|
|
return
|
|
}
|
|
|
|
b, err := ioutil.ReadAll(r.Body)
|
|
if err != nil {
|
|
log.Println("rafthttp: error reading raft message:", err)
|
|
http.Error(w, "error reading raft message", http.StatusBadRequest)
|
|
return
|
|
}
|
|
var m raftpb.Message
|
|
if err := m.Unmarshal(b); err != nil {
|
|
log.Println("rafthttp: error unmarshaling raft message:", err)
|
|
http.Error(w, "error unmarshaling raft message", http.StatusBadRequest)
|
|
return
|
|
}
|
|
if err := h.p.Process(context.TODO(), m); err != nil {
|
|
switch v := err.(type) {
|
|
case writerToResponse:
|
|
v.WriteTo(w)
|
|
default:
|
|
log.Printf("rafthttp: error processing raft message: %v", err)
|
|
http.Error(w, "error processing raft message", http.StatusInternalServerError)
|
|
}
|
|
return
|
|
}
|
|
w.WriteHeader(http.StatusNoContent)
|
|
}
|
|
|
|
type writerToResponse interface {
|
|
WriteTo(w http.ResponseWriter)
|
|
}
|