mirror of https://github.com/k3s-io/k3s
97 lines
3.0 KiB
Go
97 lines
3.0 KiB
Go
/*
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Copyright 2014 Google Inc. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package handlers
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import (
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"net/http"
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"sync"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/auth/authenticator"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/auth/user"
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"github.com/golang/glog"
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)
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// RequestContext is the interface used to associate a user with an http Request.
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type RequestContext interface {
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Set(*http.Request, user.Info)
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Get(req *http.Request) (user.Info, bool)
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Remove(*http.Request)
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}
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// NewRequestAuthenticator creates an http handler that tries to authenticate the given request as a user, and then
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// stores any such user found onto the provided context for the request. If authentication fails or returns an error
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// the failed handler is used. On success, handler is invoked to serve the request.
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func NewRequestAuthenticator(context RequestContext, auth authenticator.Request, failed http.Handler, handler http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
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user, ok, err := auth.AuthenticateRequest(req)
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if err != nil || !ok {
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if err != nil {
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glog.Errorf("Unable to authenticate the request due to an error: %v", err)
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}
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failed.ServeHTTP(w, req)
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return
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}
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context.Set(req, user)
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defer context.Remove(req)
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handler.ServeHTTP(w, req)
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})
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}
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var Unauthorized http.HandlerFunc = unauthorized
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// unauthorized serves an unauthorized message to clients.
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func unauthorized(w http.ResponseWriter, req *http.Request) {
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http.Error(w, "Unauthorized", http.StatusUnauthorized)
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}
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// UserRequestContext allows different levels of a call stack to store/retrieve info about the
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// current user associated with an http.Request.
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type UserRequestContext struct {
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requests map[*http.Request]user.Info
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lock sync.Mutex
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}
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// NewUserRequestContext provides a map for storing and retrieving users associated with requests.
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// Be sure to pair each `context.Set(req, user)` call with a `defer context.Remove(req)` call or
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// you will leak requests. It implements the RequestContext interface.
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func NewUserRequestContext() *UserRequestContext {
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return &UserRequestContext{
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requests: make(map[*http.Request]user.Info),
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}
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}
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func (c *UserRequestContext) Get(req *http.Request) (user.Info, bool) {
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c.lock.Lock()
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defer c.lock.Unlock()
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user, ok := c.requests[req]
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return user, ok
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}
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func (c *UserRequestContext) Set(req *http.Request, user user.Info) {
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c.lock.Lock()
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defer c.lock.Unlock()
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c.requests[req] = user
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}
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func (c *UserRequestContext) Remove(req *http.Request) {
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c.lock.Lock()
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defer c.lock.Unlock()
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delete(c.requests, req)
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}
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