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jeremybenn |
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Reverse proxy tests.
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package httputil
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import (
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"io/ioutil"
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"net/http"
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"net/http/httptest"
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"net/url"
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"testing"
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)
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func TestReverseProxy(t *testing.T) {
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const backendResponse = "I am the backend"
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const backendStatus = 404
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backend := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if len(r.TransferEncoding) > 0 {
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t.Errorf("backend got unexpected TransferEncoding: %v", r.TransferEncoding)
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}
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if r.Header.Get("X-Forwarded-For") == "" {
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t.Errorf("didn't get X-Forwarded-For header")
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}
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if c := r.Header.Get("Connection"); c != "" {
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t.Errorf("handler got Connection header value %q", c)
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}
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if g, e := r.Host, "some-name"; g != e {
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t.Errorf("backend got Host header %q, want %q", g, e)
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}
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w.Header().Set("X-Foo", "bar")
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http.SetCookie(w, &http.Cookie{Name: "flavor", Value: "chocolateChip"})
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w.WriteHeader(backendStatus)
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w.Write([]byte(backendResponse))
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}))
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defer backend.Close()
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backendURL, err := url.Parse(backend.URL)
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if err != nil {
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t.Fatal(err)
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}
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proxyHandler := NewSingleHostReverseProxy(backendURL)
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frontend := httptest.NewServer(proxyHandler)
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defer frontend.Close()
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getReq, _ := http.NewRequest("GET", frontend.URL, nil)
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getReq.Host = "some-name"
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getReq.Header.Set("Connection", "close")
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getReq.Close = true
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res, err := http.DefaultClient.Do(getReq)
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if err != nil {
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t.Fatalf("Get: %v", err)
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}
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if g, e := res.StatusCode, backendStatus; g != e {
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t.Errorf("got res.StatusCode %d; expected %d", g, e)
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}
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if g, e := res.Header.Get("X-Foo"), "bar"; g != e {
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t.Errorf("got X-Foo %q; expected %q", g, e)
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}
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if g, e := len(res.Header["Set-Cookie"]), 1; g != e {
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t.Fatalf("got %d SetCookies, want %d", g, e)
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}
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if cookie := res.Cookies()[0]; cookie.Name != "flavor" {
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t.Errorf("unexpected cookie %q", cookie.Name)
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}
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bodyBytes, _ := ioutil.ReadAll(res.Body)
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if g, e := string(bodyBytes), backendResponse; g != e {
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t.Errorf("got body %q; expected %q", g, e)
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}
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}
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var proxyQueryTests = []struct {
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baseSuffix string // suffix to add to backend URL
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reqSuffix string // suffix to add to frontend's request URL
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want string // what backend should see for final request URL (without ?)
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}{
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{"", "", ""},
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{"?sta=tic", "?us=er", "sta=tic&us=er"},
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{"", "?us=er", "us=er"},
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{"?sta=tic", "", "sta=tic"},
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}
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func TestReverseProxyQuery(t *testing.T) {
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backend := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("X-Got-Query", r.URL.RawQuery)
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w.Write([]byte("hi"))
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}))
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defer backend.Close()
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for i, tt := range proxyQueryTests {
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backendURL, err := url.Parse(backend.URL + tt.baseSuffix)
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if err != nil {
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t.Fatal(err)
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}
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frontend := httptest.NewServer(NewSingleHostReverseProxy(backendURL))
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req, _ := http.NewRequest("GET", frontend.URL+tt.reqSuffix, nil)
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req.Close = true
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res, err := http.DefaultClient.Do(req)
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if err != nil {
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t.Fatalf("%d. Get: %v", i, err)
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}
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if g, e := res.Header.Get("X-Got-Query"), tt.want; g != e {
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t.Errorf("%d. got query %q; expected %q", i, g, e)
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}
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res.Body.Close()
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frontend.Close()
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}
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}
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