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redirect.go
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redirect.go
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/*
Copyright 2014 Google Inc. All rights reserved.
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 apiserver
import (
"net/http"
"time"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api/errors"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api/rest"
"github.com/GoogleCloudPlatform/kubernetes/pkg/httplog"
"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
)
type RedirectHandler struct {
storage map[string]rest.Storage
codec runtime.Codec
context api.RequestContextMapper
apiRequestInfoResolver *APIRequestInfoResolver
}
func (r *RedirectHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
var verb string
var apiResource string
var httpCode int
reqStart := time.Now()
defer 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
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.(rest.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
}
if location == nil {
httplog.LogOf(req, w).Addf("ResourceLocation for %v returned nil", id)
notFound(w, req)
httpCode = http.StatusNotFound
return
}
// Default to http
if location.Scheme == "" {
location.Scheme = "http"
}
w.Header().Set("Location", location.String())
w.WriteHeader(http.StatusTemporaryRedirect)
httpCode = http.StatusTemporaryRedirect
}