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(),
}
proxy.FlushInterval = 200 * time.Millisecond
proxy.ServeHTTP(w, newReq)
}
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)
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, location, roundTripper) {
return
}
// Redirect requests of the form "/{resource}/{name}" to "/{resource}/{name}/"
// This is essentially a hack for https://github.com/GoogleCloudPlatform/kubernetes/issues/4958.
// Note: Keep this code after tryUpgrade to not break that flow.
if len(parts) == 2 && !strings.HasSuffix(req.URL.Path, "/") {
var queryPart string
if len(req.URL.RawQuery) > 0 {
queryPart = "?" + req.URL.RawQuery
}
w.Header().Set("Location", req.URL.Path+"/"+queryPart)
w.WriteHeader(http.StatusMovedPermanently)
return
}
start := time.Now()
glog.V(4).Infof("[%x] Beginning proxy %s...", proxyHandlerTraceID, req.URL)
defer func() {
glog.V(4).Infof("[%x] Proxy %v finished %v.", proxyHandlerTraceID, req.URL, time.Now().Sub(start))
}()
proxy := httputil.NewSingleHostReverseProxy(&url.URL{Scheme: location.Scheme, Host: location.Host})
alreadyRewriting := false
if roundTripper != nil {
_, alreadyRewriting = roundTripper.(*proxyutil.Transport)
glog.V(5).Infof("[%x] Not making a reriting transport for proxy %s...", proxyHandlerTraceID, req.URL)
}
if !alreadyRewriting {
glog.V(5).Infof("[%x] making a transport for proxy %s...", proxyHandlerTraceID, req.URL)
prepend := path.Join(r.prefix, resource, id)
if len(namespace) > 0 {
prepend = path.Join(r.prefix, "namespaces", namespace, resource, id)
}
pTransport := &proxyutil.Transport{
Scheme: req.URL.Scheme,
Host: req.URL.Host,
PathPrepend: prepend,
RoundTripper: roundTripper,
}
roundTripper = pTransport
}
proxy.Transport = roundTripper
proxy.FlushInterval = 200 * time.Millisecond
proxy.ServeHTTP(w, newReq)
}
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)
}
