func (r *RedirectHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	parts := splitPath(req.URL.Path)
	if len(parts) != 2 || req.Method != "GET" {
		notFound(w, req)
		return
	}
	resourceName := parts[0]
	id := parts[1]
	storage, ok := r.storage[resourceName]
	if !ok {
		httplog.LogOf(w).Addf("'%v' has no storage object", resourceName)
		notFound(w, req)
		return
	}

	redirector, ok := storage.(Redirector)
	if !ok {
		httplog.LogOf(w).Addf("'%v' is not a redirector", resourceName)
		notFound(w, req)
		return
	}

	location, err := redirector.ResourceLocation(id)
	if err != nil {
		status := errToAPIStatus(err)
		writeJSON(status.Code, r.codec, status, w)
		return
	}

	w.Header().Set("Location", location)
	w.WriteHeader(http.StatusTemporaryRedirect)
}

func (r *RedirectHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	var verb string
	var apiResource string
	var httpCode int
	reqStart := time.Now()
	defer monitor("redirect", &verb, &apiResource, &httpCode, reqStart)

	requestInfo, err := r.apiRequestInfoResolver.GetAPIRequestInfo(req)
	if err != nil {
		notFound(w, req)
		httpCode = http.StatusNotFound
		return
	}
	verb = requestInfo.Verb
	resource, parts := requestInfo.Resource, requestInfo.Parts
	ctx, ok := r.context.Get(req)
	if !ok {
		ctx = api.NewContext()
	}
	ctx = api.WithNamespace(ctx, requestInfo.Namespace)

	// redirection requires /resource/resourceName path parts
	if len(parts) != 2 || req.Method != "GET" {
		notFound(w, req)
		httpCode = http.StatusNotFound
		return
	}
	id := parts[1]
	storage, ok := r.storage[resource]
	if !ok {
		httplog.LogOf(req, w).Addf("'%v' has no storage object", resource)
		notFound(w, req)
		httpCode = http.StatusNotFound
		return
	}
	apiResource = resource

	redirector, ok := storage.(Redirector)
	if !ok {
		httplog.LogOf(req, w).Addf("'%v' is not a redirector", resource)
		httpCode = errorJSON(errors.NewMethodNotSupported(resource, "redirect"), r.codec, w)
		return
	}

	location, err := redirector.ResourceLocation(ctx, id)
	if err != nil {
		status := errToAPIStatus(err)
		writeJSON(status.Code, r.codec, status, w)
		httpCode = status.Code
		return
	}

	w.Header().Set("Location", fmt.Sprintf("http://%s", location))
	w.WriteHeader(http.StatusTemporaryRedirect)
	httpCode = http.StatusTemporaryRedirect
}

func (r *ProxyHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	parts := strings.SplitN(req.URL.Path, "/", 3)
	if len(parts) < 2 {
		notFound(w, req)
		return
	}
	resourceName := parts[0]
	id := parts[1]
	rest := ""
	if len(parts) == 3 {
		rest = parts[2]
	}
	storage, ok := r.storage[resourceName]
	if !ok {
		httplog.LogOf(w).Addf("'%v' has no storage object", resourceName)
		notFound(w, req)
		return
	}

	redirector, ok := storage.(Redirector)
	if !ok {
		httplog.LogOf(w).Addf("'%v' is not a redirector", resourceName)
		notFound(w, req)
		return
	}

	location, err := redirector.ResourceLocation(id)
	if err != nil {
		status := errToAPIStatus(err)
		writeJSON(status.Code, r.codec, status, w)
		return
	}

	destURL, err := url.Parse(location)
	if err != nil {
		status := errToAPIStatus(err)
		writeJSON(status.Code, r.codec, status, w)
		return
	}
	destURL.Path = rest
	destURL.RawQuery = req.URL.RawQuery
	newReq, err := http.NewRequest(req.Method, destURL.String(), req.Body)
	if err != nil {
		glog.Errorf("Failed to create request: %s", err)
	}
	newReq.Header = req.Header

	proxy := httputil.NewSingleHostReverseProxy(&url.URL{Scheme: "http", Host: destURL.Host})
	proxy.Transport = &proxyTransport{
		proxyScheme:      req.URL.Scheme,
		proxyHost:        req.URL.Host,
		proxyPathPrepend: path.Join(r.prefix, resourceName, id),
	}
	proxy.ServeHTTP(w, newReq)
}

func (r *RedirectHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	namespace, kind, parts, err := KindAndNamespace(req)
	if err != nil {
		notFound(w, req)
		return
	}
	ctx := api.WithNamespace(api.NewContext(), namespace)

	// redirection requires /kind/resourceName path parts
	if len(parts) != 2 || req.Method != "GET" {
		notFound(w, req)
		return
	}
	id := parts[1]
	storage, ok := r.storage[kind]
	if !ok {
		httplog.LogOf(req, w).Addf("'%v' has no storage object", kind)
		notFound(w, req)
		return
	}

	redirector, ok := storage.(Redirector)
	if !ok {
		httplog.LogOf(req, w).Addf("'%v' is not a redirector", kind)
		errorJSON(errors.NewMethodNotSupported(kind, "redirect"), r.codec, w)
		return
	}

	location, err := redirector.ResourceLocation(ctx, id)
	if err != nil {
		status := errToAPIStatus(err)
		writeJSON(status.Code, r.codec, status, w)
		return
	}

	w.Header().Set("Location", location)
	w.WriteHeader(http.StatusTemporaryRedirect)
}

// ServeHTTP handles requests to all RESTStorage objects.
func (h *RESTHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	parts := splitPath(req.URL.Path)
	if len(parts) < 1 {
		notFound(w, req)
		return
	}
	storage := h.storage[parts[0]]
	if storage == nil {
		httplog.LogOf(req, w).Addf("'%v' has no storage object", parts[0])
		notFound(w, req)
		return
	}

	h.handleRESTStorage(parts, req, w, storage)
}

// ServeHTTP serves a series of JSON encoded events via straight HTTP with
// Transfer-Encoding: chunked.
func (self *WatchServer) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	loggedW := httplog.LogOf(req, w)
	w = httplog.Unlogged(w)

	cn, ok := w.(http.CloseNotifier)
	if !ok {
		loggedW.Addf("unable to get CloseNotifier")
		http.NotFound(w, req)
		return
	}
	flusher, ok := w.(http.Flusher)
	if !ok {
		loggedW.Addf("unable to get Flusher")
		http.NotFound(w, req)
		return
	}

	w.Header().Set("Transfer-Encoding", "chunked")
	w.WriteHeader(http.StatusOK)
	flusher.Flush()

	encoder := json.NewEncoder(w)
	for {
		select {
		case <-cn.CloseNotify():
			self.watching.Stop()
			return
		case event, ok := <-self.watching.ResultChan():
			if !ok {
				// End of results.
				return
			}
			obj, err := api.NewJSONWatchEvent(self.codec, event)
			if err != nil {
				// Client disconnect.
				self.watching.Stop()
				return
			}
			if err := encoder.Encode(obj); err != nil {
				// Client disconnect.
				self.watching.Stop()
				return
			}
			flusher.Flush()
		}
	}
}

// ServeHTTP serves a series of JSON encoded events via straight HTTP with
// Transfer-Encoding: chunked.
func (self *WatchServer) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	loggedW := httplog.LogOf(w)
	w = httplog.Unlogged(w)

	cn, ok := w.(http.CloseNotifier)
	if !ok {
		loggedW.Addf("unable to get CloseNotifier")
		http.NotFound(loggedW, req)
		return
	}
	flusher, ok := w.(http.Flusher)
	if !ok {
		loggedW.Addf("unable to get Flusher")
		http.NotFound(loggedW, req)
		return
	}

	loggedW.Header().Set("Transfer-Encoding", "chunked")
	loggedW.WriteHeader(http.StatusOK)
	flusher.Flush()

	encoder := json.NewEncoder(w)
	for {
		select {
		case <-cn.CloseNotify():
			self.watching.Stop()
			return
		case event, ok := <-self.watching.ResultChan():
			if !ok {
				// End of results.
				return
			}
			err := encoder.Encode(&api.WatchEvent{
				Type:   event.Type,
				Object: api.APIObject{event.Object},
			})
			if err != nil {
				// Client disconnect.
				self.watching.Stop()
				return
			}
			flusher.Flush()
		}
	}
}

// handleREST handles requests to all our RESTStorage objects.
func (s *APIServer) handleREST(w http.ResponseWriter, req *http.Request) {
	if !strings.HasPrefix(req.URL.Path, s.prefix) {
		notFound(w, req)
		return
	}
	requestParts := strings.Split(req.URL.Path[len(s.prefix):], "/")[1:]
	if len(requestParts) < 1 {
		notFound(w, req)
		return
	}
	storage := s.storage[requestParts[0]]
	if storage == nil {
		httplog.LogOf(w).Addf("'%v' has no storage object", requestParts[0])
		notFound(w, req)
		return
	}

	s.handleRESTStorage(requestParts, req, w, storage)
}

// ServeHTTP serves a series of JSON encoded events via straight HTTP with
// Transfer-Encoding: chunked.
func (self *WatchServer) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	loggedW := httplog.LogOf(req, w)
	w = httplog.Unlogged(w)
	timeoutCh, cleanup := self.t.TimeoutCh()
	defer cleanup()
	defer self.watching.Stop()

	cn, ok := w.(http.CloseNotifier)
	if !ok {
		loggedW.Addf("unable to get CloseNotifier")
		http.NotFound(w, req)
		return
	}
	flusher, ok := w.(http.Flusher)
	if !ok {
		loggedW.Addf("unable to get Flusher")
		http.NotFound(w, req)
		return
	}
	w.Header().Set("Transfer-Encoding", "chunked")
	w.WriteHeader(http.StatusOK)
	flusher.Flush()
	encoder := watchjson.NewEncoder(w, self.codec)
	for {
		select {
		case <-cn.CloseNotify():
			return
		case <-timeoutCh:
			return
		case event, ok := <-self.watching.ResultChan():
			if !ok {
				// End of results.
				return
			}
			self.fixup(event.Object)
			if err := encoder.Encode(&event); err != nil {
				// Client disconnect.
				return
			}
			flusher.Flush()
		}
	}
}

// finishReq finishes up a request, waiting until the operation finishes or, after a timeout, creating an
// Operation to receive the result and returning its ID down the writer.
func (s *APIServer) finishReq(op *Operation, w http.ResponseWriter) {
	obj, complete := op.StatusOrResult()
	if complete {
		status := http.StatusOK
		switch stat := obj.(type) {
		case api.Status:
			httplog.LogOf(w).Addf("programmer error: use *api.Status as a result, not api.Status.")
			if stat.Code != 0 {
				status = stat.Code
			}
		case *api.Status:
			if stat.Code != 0 {
				status = stat.Code
			}
		}
		writeJSON(status, obj, w)
	} else {
		writeJSON(http.StatusAccepted, obj, w)
	}
}

// finishReq finishes up a request, waiting until the operation finishes or, after a timeout, creating an
// Operation to recieve the result and returning its ID down the writer.
func (server *APIServer) finishReq(out <-chan interface{}, sync bool, timeout time.Duration, w http.ResponseWriter) {
	op := server.ops.NewOperation(out)
	if sync {
		op.WaitFor(timeout)
	}
	obj, complete := op.StatusOrResult()
	if complete {
		status := http.StatusOK
		switch stat := obj.(type) {
		case api.Status:
			httplog.LogOf(w).Addf("programmer error: use *api.Status as a result, not api.Status.")
			if stat.Code != 0 {
				status = stat.Code
			}
		case *api.Status:
			if stat.Code != 0 {
				status = stat.Code
			}
		}
		server.write(status, obj, w)
	} else {
		server.write(http.StatusAccepted, obj, w)
	}
}

func (r *ProxyHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	var verb string
	var apiResource string
	var httpCode int
	reqStart := time.Now()
	defer monitor("proxy", &verb, &apiResource, &httpCode, reqStart)

	requestInfo, err := r.apiRequestInfoResolver.GetAPIRequestInfo(req)
	if err != nil {
		notFound(w, req)
		httpCode = http.StatusNotFound
		return
	}
	verb = requestInfo.Verb
	namespace, resource, parts := requestInfo.Namespace, requestInfo.Resource, requestInfo.Parts

	ctx, ok := r.context.Get(req)
	if !ok {
		ctx = api.NewContext()
	}
	ctx = api.WithNamespace(ctx, namespace)
	if len(parts) < 2 {
		notFound(w, req)
		httpCode = http.StatusNotFound
		return
	}
	id := parts[1]
	rest := ""
	if len(parts) > 2 {
		proxyParts := parts[2:]
		rest = strings.Join(proxyParts, "/")
		if strings.HasSuffix(req.URL.Path, "/") {
			// The original path had a trailing slash, which has been stripped
			// by KindAndNamespace(). We should add it back because some
			// servers (like etcd) require it.
			rest = rest + "/"
		}
	}
	storage, ok := r.storage[resource]
	if !ok {
		httplog.LogOf(req, w).Addf("'%v' has no storage object", resource)
		notFound(w, req)
		httpCode = http.StatusNotFound
		return
	}
	apiResource = resource

	redirector, ok := storage.(Redirector)
	if !ok {
		httplog.LogOf(req, w).Addf("'%v' is not a redirector", resource)
		httpCode = errorJSON(errors.NewMethodNotSupported(resource, "proxy"), r.codec, w)
		return
	}

	location, err := redirector.ResourceLocation(ctx, id)
	if err != nil {
		httplog.LogOf(req, w).Addf("Error getting ResourceLocation: %v", err)
		status := errToAPIStatus(err)
		writeJSON(status.Code, r.codec, status, w)
		httpCode = status.Code
		return
	}

	destURL, err := url.Parse(location)
	if err != nil {
		status := errToAPIStatus(err)
		writeJSON(status.Code, r.codec, status, w)
		httpCode = status.Code
		return
	}
	if destURL.Scheme == "" {
		// If no scheme was present in location, url.Parse sometimes mistakes
		// hosts for paths.
		destURL.Host = location
	}
	destURL.Path = rest
	destURL.RawQuery = req.URL.RawQuery
	newReq, err := http.NewRequest(req.Method, destURL.String(), req.Body)
	if err != nil {
		status := errToAPIStatus(err)
		writeJSON(status.Code, r.codec, status, w)
		notFound(w, req)
		httpCode = status.Code
		return
	}
	httpCode = http.StatusOK
	newReq.Header = req.Header

	// TODO convert this entire proxy to an UpgradeAwareProxy similar to
	// https://github.com/openshift/origin/blob/master/pkg/util/httpproxy/upgradeawareproxy.go.
	// That proxy needs to be modified to support multiple backends, not just 1.
	if r.tryUpgrade(w, req, newReq, destURL) {
		return
	}

	proxy := httputil.NewSingleHostReverseProxy(&url.URL{Scheme: "http", Host: destURL.Host})
	proxy.Transport = &proxyTransport{
		proxyScheme:      req.URL.Scheme,
		proxyHost:        req.URL.Host,
		proxyPathPrepend: requestInfo.URLPath(),
//.........这里部分代码省略.........

func (r *ProxyHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	namespace, kind, parts, err := KindAndNamespace(req)
	if err != nil {
		notFound(w, req)
		return
	}
	ctx := api.WithNamespace(api.NewContext(), namespace)
	if len(parts) < 2 {
		notFound(w, req)
		return
	}
	id := parts[1]
	rest := ""
	if len(parts) > 2 {
		proxyParts := parts[2:]
		rest = strings.Join(proxyParts, "/")
	}
	storage, ok := r.storage[kind]
	if !ok {
		httplog.LogOf(req, w).Addf("'%v' has no storage object", kind)
		notFound(w, req)
		return
	}

	redirector, ok := storage.(Redirector)
	if !ok {
		httplog.LogOf(req, w).Addf("'%v' is not a redirector", kind)
		errorJSON(errors.NewMethodNotSupported(kind, "proxy"), r.codec, w)
		return
	}

	location, err := redirector.ResourceLocation(ctx, id)
	if err != nil {
		httplog.LogOf(req, w).Addf("Error getting ResourceLocation: %v", err)
		status := errToAPIStatus(err)
		writeJSON(status.Code, r.codec, status, w)
		return
	}
	if location == "" {
		httplog.LogOf(req, w).Addf("ResourceLocation for %v returned ''", id)
		notFound(w, req)
		return
	}

	destURL, err := url.Parse(location)
	if err != nil {
		status := errToAPIStatus(err)
		writeJSON(status.Code, r.codec, status, w)
		return
	}
	if destURL.Scheme == "" {
		// If no scheme was present in location, url.Parse sometimes mistakes
		// hosts for paths.
		destURL.Host = location
	}
	destURL.Path = rest
	destURL.RawQuery = req.URL.RawQuery
	newReq, err := http.NewRequest(req.Method, destURL.String(), req.Body)
	if err != nil {
		status := errToAPIStatus(err)
		writeJSON(status.Code, r.codec, status, w)
		notFound(w, req)
		return
	}
	newReq.Header = req.Header

	proxy := httputil.NewSingleHostReverseProxy(&url.URL{Scheme: "http", Host: destURL.Host})
	proxy.Transport = &proxyTransport{
		proxyScheme:      req.URL.Scheme,
		proxyHost:        req.URL.Host,
		proxyPathPrepend: path.Join(r.prefix, "ns", namespace, kind, id),
	}
	proxy.FlushInterval = 200 * time.Millisecond
	proxy.ServeHTTP(w, newReq)
}

func (r *ProxyHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	proxyHandlerTraceID := rand.Int63()

	var verb string
	var apiResource string
	var httpCode int
	reqStart := time.Now()
	defer metrics.Monitor(&verb, &apiResource, util.GetClient(req), &httpCode, reqStart)

	requestInfo, err := r.apiRequestInfoResolver.GetAPIRequestInfo(req)
	if err != nil {
		notFound(w, req)
		httpCode = http.StatusNotFound
		return
	}
	verb = requestInfo.Verb
	namespace, resource, parts := requestInfo.Namespace, requestInfo.Resource, requestInfo.Parts

	ctx, ok := r.context.Get(req)
	if !ok {
		ctx = api.NewContext()
	}
	ctx = api.WithNamespace(ctx, namespace)
	if len(parts) < 2 {
		notFound(w, req)
		httpCode = http.StatusNotFound
		return
	}
	id := parts[1]
	remainder := ""
	if len(parts) > 2 {
		proxyParts := parts[2:]
		remainder = strings.Join(proxyParts, "/")
		if strings.HasSuffix(req.URL.Path, "/") {
			// The original path had a trailing slash, which has been stripped
			// by KindAndNamespace(). We should add it back because some
			// servers (like etcd) require it.
			remainder = remainder + "/"
		}
	}
	storage, ok := r.storage[resource]
	if !ok {
		httplog.LogOf(req, w).Addf("'%v' has no storage object", resource)
		notFound(w, req)
		httpCode = http.StatusNotFound
		return
	}
	apiResource = resource

	redirector, ok := storage.(rest.Redirector)
	if !ok {
		httplog.LogOf(req, w).Addf("'%v' is not a redirector", resource)
		httpCode = errorJSON(errors.NewMethodNotSupported(resource, "proxy"), r.codec, w)
		return
	}

	location, roundTripper, err := redirector.ResourceLocation(ctx, id)
	if err != nil {
		httplog.LogOf(req, w).Addf("Error getting ResourceLocation: %v", err)
		status := errToAPIStatus(err)
		writeJSON(status.Code, r.codec, status, w, true)
		httpCode = status.Code
		return
	}
	if location == nil {
		httplog.LogOf(req, w).Addf("ResourceLocation for %v returned nil", id)
		notFound(w, req)
		httpCode = http.StatusNotFound
		return
	}
	// If we have a custom dialer, and no pre-existing transport, initialize it to use the dialer.
	if roundTripper == nil && r.dial != nil {
		glog.V(5).Infof("[%x: %v] making a dial-only transport...", proxyHandlerTraceID, req.URL)
		roundTripper = &http.Transport{Dial: r.dial}
	} else if roundTripper != nil {
		glog.V(5).Infof("[%x: %v] using transport %T...", proxyHandlerTraceID, req.URL, roundTripper)
	}

	// Default to http
	if location.Scheme == "" {
		location.Scheme = "http"
	}
	// Add the subpath
	if len(remainder) > 0 {
		location.Path = singleJoiningSlash(location.Path, remainder)
	}
	// Start with anything returned from the storage, and add the original request's parameters
	values := location.Query()
	for k, vs := range req.URL.Query() {
		for _, v := range vs {
			values.Add(k, v)
		}
	}
	location.RawQuery = values.Encode()

	newReq, err := http.NewRequest(req.Method, location.String(), req.Body)
	if err != nil {
		status := errToAPIStatus(err)
		writeJSON(status.Code, r.codec, status, w, true)
		notFound(w, req)
//.........这里部分代码省略.........

func (r *ProxyHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	// use the default namespace to address the service
	ctx := api.NewDefaultContext()
	// if not in default namespace, provide the query parameter
	// TODO this will need to go in the path in the future and not as a query parameter
	namespace := req.URL.Query().Get("namespace")
	if len(namespace) > 0 {
		ctx = api.WithNamespace(ctx, namespace)
	}
	parts := strings.SplitN(req.URL.Path, "/", 3)
	if len(parts) < 2 {
		notFound(w, req)
		return
	}
	resourceName := parts[0]
	id := parts[1]
	rest := ""
	if len(parts) == 3 {
		rest = parts[2]
	}
	storage, ok := r.storage[resourceName]
	if !ok {
		httplog.LogOf(req, w).Addf("'%v' has no storage object", resourceName)
		notFound(w, req)
		return
	}

	redirector, ok := storage.(Redirector)
	if !ok {
		httplog.LogOf(req, w).Addf("'%v' is not a redirector", resourceName)
		notFound(w, req)
		return
	}

	location, err := redirector.ResourceLocation(ctx, id)
	if err != nil {
		httplog.LogOf(req, w).Addf("Error getting ResourceLocation: %v", err)
		status := errToAPIStatus(err)
		writeJSON(status.Code, r.codec, status, w)
		return
	}
	if location == "" {
		httplog.LogOf(req, w).Addf("ResourceLocation for %v returned ''", id)
		notFound(w, req)
		return
	}

	destURL, err := url.Parse(location)
	if err != nil {
		status := errToAPIStatus(err)
		writeJSON(status.Code, r.codec, status, w)
		return
	}
	if destURL.Scheme == "" {
		// If no scheme was present in location, url.Parse sometimes mistakes
		// hosts for paths.
		destURL.Host = location
	}
	destURL.Path = rest
	destURL.RawQuery = req.URL.RawQuery
	newReq, err := http.NewRequest(req.Method, destURL.String(), req.Body)
	if err != nil {
		status := errToAPIStatus(err)
		writeJSON(status.Code, r.codec, status, w)
		notFound(w, req)
		return
	}
	newReq.Header = req.Header

	proxy := httputil.NewSingleHostReverseProxy(&url.URL{Scheme: "http", Host: destURL.Host})
	proxy.Transport = &proxyTransport{
		proxyScheme:      req.URL.Scheme,
		proxyHost:        req.URL.Host,
		proxyPathPrepend: path.Join(r.prefix, resourceName, id),
	}
	proxy.FlushInterval = 200 * time.Millisecond
	proxy.ServeHTTP(w, newReq)
}