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mux.go
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mux.go
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// 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 api
import (
"net/http"
"github.com/coreos/fleet/client"
"github.com/coreos/fleet/log"
"github.com/coreos/fleet/registry"
"github.com/coreos/fleet/version"
"github.com/prometheus/client_golang/prometheus"
)
func NewServeMux(reg registry.Registry, tokenLimit int) http.Handler {
sm := http.NewServeMux()
cAPI := &client.RegistryClient{Registry: reg}
for _, prefix := range []string{"/v1-alpha", "/fleet/v1"} {
wireUpDiscoveryResource(sm, prefix)
wireUpMachinesResource(sm, prefix, tokenLimit, cAPI)
wireUpStateResource(sm, prefix, tokenLimit, cAPI)
wireUpUnitsResource(sm, prefix, tokenLimit, cAPI)
sm.HandleFunc(prefix, methodNotAllowedHandler)
}
sm.HandleFunc("/", baseHandler)
sm.Handle("/metrics", prometheus.Handler())
hdlr := http.Handler(sm)
hdlr = &loggingMiddleware{hdlr}
hdlr = &serverInfoMiddleware{hdlr}
return hdlr
}
type loggingMiddleware struct {
next http.Handler
}
func (lm *loggingMiddleware) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
log.Debugf("HTTP %s %v", req.Method, req.URL)
lm.next.ServeHTTP(rw, req)
}
type serverInfoMiddleware struct {
next http.Handler
}
func (si *serverInfoMiddleware) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
rw.Header().Set("Server", "fleetd/"+version.Version)
si.next.ServeHTTP(rw, req)
}
func methodNotAllowedHandler(rw http.ResponseWriter, req *http.Request) {
sendError(rw, http.StatusMethodNotAllowed, nil)
}
func baseHandler(rw http.ResponseWriter, req *http.Request) {
var code int
if req.URL.Path == "/" {
code = http.StatusMethodNotAllowed
} else {
code = http.StatusNotFound
}
sendError(rw, code, nil)
}