/* Copyright 2014 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 ( "bytes" "io" "io/ioutil" "net/http" "net/http/httptest" "net/url" "testing" "golang.org/x/net/websocket" ) type SimpleBackendHandler struct { requestURL url.URL requestHeader http.Header requestBody []byte requestMethod string responseBody string responseHeader map[string]string t *testing.T } func (s *SimpleBackendHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) { s.requestURL = *req.URL s.requestHeader = req.Header s.requestMethod = req.Method var err error s.requestBody, err = ioutil.ReadAll(req.Body) if err != nil { s.t.Errorf("Unexpected error: %v", err) return } for k, v := range s.responseHeader { w.Header().Add(k, v) } w.Write([]byte(s.responseBody)) } func validateParameters(t *testing.T, name string, actual url.Values, expected map[string]string) { for k, v := range expected { actualValue, ok := actual[k] if !ok { t.Errorf("%s: Expected parameter %s not received", name, k) continue } if actualValue[0] != v { t.Errorf("%s: Parameter %s values don't match. Actual: %#v, Expected: %s", name, k, actualValue, v) } } } func validateHeaders(t *testing.T, name string, actual http.Header, expected map[string]string) { for k, v := range expected { actualValue, ok := actual[k] if !ok { t.Errorf("%s: Expected header %s not received", name, k) continue } if actualValue[0] != v { t.Errorf("%s: Header %s values don't match. Actual: %s, Expected: %s", name, k, actualValue, v) } } } func TestServeHTTP(t *testing.T) { tests := []struct { name string method string requestPath string requestBody string requestParams map[string]string requestHeader map[string]string }{ { name: "root path, simple get", method: "GET", requestPath: "/", }, { name: "simple path, get", method: "GET", requestPath: "/path/to/test", }, { name: "request params", method: "POST", requestPath: "/some/path", requestParams: map[string]string{"param1": "value/1", "param2": "value%2"}, requestBody: "test request body", }, { name: "request headers", method: "PUT", requestPath: "/some/path", requestHeader: map[string]string{"Header1": "value1", "Header2": "value2"}, }, } for _, test := range tests { func() { backendResponse := "Hello" backendHandler := &SimpleBackendHandler{ responseBody: backendResponse, responseHeader: map[string]string{"Content-Type": "text/html"}, } backendServer := httptest.NewServer(backendHandler) defer backendServer.Close() backendURL, _ := url.Parse(backendServer.URL) backendURL.Path = test.requestPath proxyHandler := &UpgradeAwareProxyHandler{ Location: backendURL, } proxyServer := httptest.NewServer(proxyHandler) defer proxyServer.Close() proxyURL, _ := url.Parse(proxyServer.URL) proxyURL.Path = test.requestPath paramValues := url.Values{} for k, v := range test.requestParams { paramValues[k] = []string{v} } proxyURL.RawQuery = paramValues.Encode() var requestBody io.Reader if test.requestBody != "" { requestBody = bytes.NewBufferString(test.requestBody) } req, err := http.NewRequest(test.method, proxyURL.String(), requestBody) if test.requestHeader != nil { header := http.Header{} for k, v := range test.requestHeader { header.Add(k, v) } req.Header = header } if err != nil { t.Errorf("Error creating client request: %v", err) } client := &http.Client{} res, err := client.Do(req) if err != nil { t.Errorf("Error from proxy request: %v", err) } // Validate backend request // Method if backendHandler.requestMethod != test.method { t.Errorf("Unexpected request method: %s. Expected: %s", backendHandler.requestMethod, test.method) } // Body if string(backendHandler.requestBody) != test.requestBody { t.Errorf("Unexpected request body: %s. Expected: %s", string(backendHandler.requestBody), test.requestBody) } // Path if backendHandler.requestURL.Path != test.requestPath { t.Errorf("Unexpected request path: %s", backendHandler.requestURL.Path) } // Parameters validateParameters(t, test.name, backendHandler.requestURL.Query(), test.requestParams) // Headers validateHeaders(t, test.name+" backend request", backendHandler.requestHeader, test.requestHeader) // Validate proxy response // Validate Body responseBody, err := ioutil.ReadAll(res.Body) if err != nil { t.Errorf("Unexpected error reading response body: %v", err) } if rb := string(responseBody); rb != backendResponse { t.Errorf("Did not get expected response body: %s. Expected: %s", rb, backendResponse) } // Error err = proxyHandler.RequestError() if err != nil { t.Errorf("Unexpected proxy handler error: %v", err) } }() } } func TestProxyUpgrade(t *testing.T) { backendServer := httptest.NewServer(websocket.Handler(func(ws *websocket.Conn) { defer ws.Close() body := make([]byte, 5) ws.Read(body) ws.Write([]byte("hello " + string(body))) })) defer backendServer.Close() serverURL, _ := url.Parse(backendServer.URL) proxyHandler := &UpgradeAwareProxyHandler{ Location: serverURL, } proxy := httptest.NewServer(proxyHandler) defer proxy.Close() ws, err := websocket.Dial("ws://"+proxy.Listener.Addr().String()+"/some/path", "", "http://127.0.0.1/") if err != nil { t.Fatalf("websocket dial err: %s", err) } defer ws.Close() if _, err := ws.Write([]byte("world")); err != nil { t.Fatalf("write err: %s", err) } response := make([]byte, 20) n, err := ws.Read(response) if err != nil { t.Fatalf("read err: %s", err) } if e, a := "hello world", string(response[0:n]); e != a { t.Fatalf("expected '%#v', got '%#v'", e, a) } }