mirror of
https://github.com/etcd-io/etcd.git
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cff005777a
Cluster and transport may recover to old states when new node joins the cluster. Record cluster last modified index to avoid this.
68 lines
1.9 KiB
Go
68 lines
1.9 KiB
Go
// Copyright 2015 CoreOS, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package etcdhttp
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import (
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"encoding/json"
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"log"
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"net/http"
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"strconv"
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"github.com/coreos/etcd/etcdserver"
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"github.com/coreos/etcd/rafthttp"
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)
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const (
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peerMembersPrefix = "/members"
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)
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// NewPeerHandler generates an http.Handler to handle etcd peer (raft) requests.
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func NewPeerHandler(clusterInfo etcdserver.ClusterInfo, timer etcdserver.RaftTimer, raftHandler http.Handler) http.Handler {
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mh := &peerMembersHandler{
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clusterInfo: clusterInfo,
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timer: timer,
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}
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mux := http.NewServeMux()
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mux.HandleFunc("/", http.NotFound)
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mux.Handle(rafthttp.RaftPrefix, raftHandler)
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mux.Handle(rafthttp.RaftPrefix+"/", raftHandler)
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mux.Handle(peerMembersPrefix, mh)
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return mux
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}
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type peerMembersHandler struct {
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clusterInfo etcdserver.ClusterInfo
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timer etcdserver.RaftTimer
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}
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func (h *peerMembersHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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if !allowMethod(w, r.Method, "GET") {
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return
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}
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w.Header().Set("X-Etcd-Cluster-ID", h.clusterInfo.ID().String())
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w.Header().Set("X-Raft-Index", strconv.FormatUint(h.timer.Index(), 10))
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if r.URL.Path != peerMembersPrefix {
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http.Error(w, "bad path", http.StatusBadRequest)
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return
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}
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ms := h.clusterInfo.Members()
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w.Header().Set("Content-Type", "application/json")
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if err := json.NewEncoder(w).Encode(ms); err != nil {
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log.Printf("etcdhttp: %v", err)
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}
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}
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