mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
synced 2025-11-03 19:58:17 +00:00
82 lines
2.3 KiB
Go
82 lines
2.3 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 kubecfg
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import (
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"net/http"
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"net/http/httputil"
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"net/url"
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"strings"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
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)
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// ProxyServer is a http.Handler which proxies Kubernetes APIs to remote API server.
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type ProxyServer struct {
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httputil.ReverseProxy
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}
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// NewProxyServer creates and installs a new ProxyServer.
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// It automatically registers the created ProxyServer to http.DefaultServeMux.
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func NewProxyServer(filebase string, cfg *client.Config) (*ProxyServer, error) {
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prefix := cfg.Prefix
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if prefix == "" {
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prefix = "/api"
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}
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target, err := url.Parse(singleJoiningSlash(cfg.Host, prefix))
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if err != nil {
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return nil, err
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}
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proxy := newProxyServer(target)
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if proxy.Transport, err = client.TransportFor(cfg); err != nil {
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return nil, err
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}
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http.Handle("/api/", http.StripPrefix("/api/", proxy))
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http.Handle("/static/", newFileHandler("/static/", filebase))
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return proxy, nil
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}
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// Serve starts the server (http.DefaultServeMux) on TCP port 8001, loops forever.
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func (s *ProxyServer) Serve() error {
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return http.ListenAndServe(":8001", nil)
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}
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func newProxyServer(target *url.URL) *ProxyServer {
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director := func(req *http.Request) {
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req.URL.Scheme = target.Scheme
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req.URL.Host = target.Host
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req.URL.Path = singleJoiningSlash(target.Path, req.URL.Path)
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}
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return &ProxyServer{ReverseProxy: httputil.ReverseProxy{Director: director}}
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}
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func newFileHandler(prefix, base string) http.Handler {
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return http.StripPrefix(prefix, http.FileServer(http.Dir(base)))
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}
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func singleJoiningSlash(a, b string) string {
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aslash := strings.HasSuffix(a, "/")
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bslash := strings.HasPrefix(b, "/")
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switch {
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case aslash && bslash:
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return a + b[1:]
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case !aslash && !bslash:
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return a + "/" + b
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}
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return a + b
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}
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