forked from openshift/origin
/
webhook.go
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/
webhook.go
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/*
Copyright 2015 The Kubernetes Authors 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 rest
import (
"net/http"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/rest"
"k8s.io/kubernetes/pkg/runtime"
)
// HookHandler is a Kubernetes API compatible webhook that is able to get access to the raw request
// and response. Used when adapting existing webhook code to the Kubernetes patterns.
type HookHandler interface {
ServeHTTP(w http.ResponseWriter, r *http.Request, ctx api.Context, name, subpath string) error
}
type httpHookHandler struct {
http.Handler
}
func (h httpHookHandler) ServeHTTP(w http.ResponseWriter, r *http.Request, ctx api.Context, name, subpath string) error {
h.Handler.ServeHTTP(w, r)
return nil
}
// WebHook provides a reusable rest.Storage implementation for linking a generic WebHook handler
// into the Kube API pattern. It is intended to be used with GET or POST against a resource's
// named path, possibly as a subresource. The handler has access to the extracted information
// from the Kube apiserver including the context, the name, and the subpath.
type WebHook struct {
h HookHandler
allowGet bool
}
var _ rest.Connecter = &WebHook{}
func NewWebHook(handler HookHandler, allowGet bool) *WebHook {
return &WebHook{
h: handler,
allowGet: allowGet,
}
}
func NewHTTPWebHook(handler http.Handler, allowGet bool) *WebHook {
return &WebHook{
h: httpHookHandler{handler},
allowGet: allowGet,
}
}
func (h *WebHook) New() runtime.Object {
return &api.Status{}
}
func (h *WebHook) Connect(ctx api.Context, name string, options runtime.Object) (rest.ConnectHandler, error) {
return &WebHookHandler{
handler: h.h,
ctx: ctx,
name: name,
options: options.(*api.PodProxyOptions),
}, nil
}
func (h *WebHook) NewConnectOptions() (runtime.Object, bool, string) {
return &api.PodProxyOptions{}, true, "path"
}
func (h *WebHook) ConnectMethods() []string {
if h.allowGet {
return []string{"GET", "POST"}
}
return []string{"POST"}
}
type WebHookHandler struct {
handler HookHandler
ctx api.Context
name string
options *api.PodProxyOptions
err error
}
var _ rest.ConnectHandler = &WebHookHandler{}
func (h *WebHookHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
h.err = h.handler.ServeHTTP(w, r, h.ctx, h.name, h.options.Path)
if h.err == nil {
w.WriteHeader(http.StatusOK)
}
}
func (h *WebHookHandler) RequestError() error {
return h.err
}