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// Copyright 2015 The etcd Authors
//
// 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 (
"encoding/json"
"net/http"
"github.com/coreos/etcd/etcdserver"
"github.com/coreos/etcd/etcdserver/api"
"github.com/coreos/etcd/lease/leasehttp"
"github.com/coreos/etcd/rafthttp"
)
const (
peerMembersPrefix = "/members"
)
// NewPeerHandler generates an http.Handler to handle etcd peer requests.
func NewPeerHandler(s *etcdserver.EtcdServer) http.Handler {
var lh http.Handler
l := s.Lessor()
if l != nil {
lh = leasehttp.NewHandler(l, func() <-chan struct{} { return s.ApplyWait() })
}
return newPeerHandler(s.Cluster(), s.RaftHandler(), lh)
}
func newPeerHandler(cluster api.Cluster, raftHandler http.Handler, leaseHandler http.Handler) http.Handler {
mh := &peerMembersHandler{
cluster: cluster,
}
mux := http.NewServeMux()
mux.HandleFunc("/", http.NotFound)
mux.Handle(rafthttp.RaftPrefix, raftHandler)
mux.Handle(rafthttp.RaftPrefix+"/", raftHandler)
mux.Handle(peerMembersPrefix, mh)
if leaseHandler != nil {
mux.Handle(leasehttp.LeasePrefix, leaseHandler)
mux.Handle(leasehttp.LeaseInternalPrefix, leaseHandler)
}
mux.HandleFunc(versionPath, versionHandler(cluster, serveVersion))
return mux
}
type peerMembersHandler struct {
cluster api.Cluster
}
func (h *peerMembersHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if !allowMethod(w, r, "GET") {
return
}
w.Header().Set("X-Etcd-Cluster-ID", h.cluster.ID().String())
if r.URL.Path != peerMembersPrefix {
http.Error(w, "bad path", http.StatusBadRequest)
return
}
ms := h.cluster.Members()
w.Header().Set("Content-Type", "application/json")
if err := json.NewEncoder(w).Encode(ms); err != nil {
plog.Warningf("failed to encode members response (%v)", err)
}
}
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