func TestHostHandlers(t *testing.T) { for _, h := range handlers { http.Handle(h.pattern, stringHandler(h.msg)) } ts := httptest.NewServer(nil) defer ts.Close() conn, err := net.Dial("tcp", ts.Listener.Addr().String()) if err != nil { t.Fatal(err) } defer conn.Close() cc := httputil.NewClientConn(conn, nil) for _, vt := range vtests { var r *http.Response var req http.Request if req.URL, err = url.Parse(vt.url); err != nil { t.Errorf("cannot parse url: %v", err) continue } if err := cc.Write(&req); err != nil { t.Errorf("writing request: %v", err) continue } r, err := cc.Read(&req) if err != nil { t.Errorf("reading response: %v", err) continue } s := r.Header.Get("Result") if s != vt.expected { t.Errorf("Get(%q) = %q, want %q", vt.url, s, vt.expected) } } }
func BenchmarkClientServer(b *testing.B) { b.StopTimer() ts := httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) { fmt.Fprintf(rw, "Hello world.\n") })) defer ts.Close() b.StartTimer() for i := 0; i < b.N; i++ { res, err := http.Get(ts.URL) if err != nil { b.Fatal("Get:", err) } all, err := ioutil.ReadAll(res.Body) if err != nil { b.Fatal("ReadAll:", err) } body := string(all) if body != "Hello world.\n" { b.Fatal("Got body:", body) } } b.StopTimer() }
// TestHeadResponses verifies that responses to HEAD requests don't // declare that they're chunking in their response headers, aren't // allowed to produce output, and don't set a Content-Type since // the real type of the body data cannot be inferred. func TestHeadResponses(t *testing.T) { ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { _, err := w.Write([]byte("Ignored body")) if err != http.ErrBodyNotAllowed { t.Errorf("on Write, expected ErrBodyNotAllowed, got %v", err) } // Also exercise the ReaderFrom path _, err = io.Copy(w, strings.NewReader("Ignored body")) if err != http.ErrBodyNotAllowed { t.Errorf("on Copy, expected ErrBodyNotAllowed, got %v", err) } })) defer ts.Close() res, err := http.Head(ts.URL) if err != nil { t.Error(err) } if len(res.TransferEncoding) > 0 { t.Errorf("expected no TransferEncoding; got %v", res.TransferEncoding) } ct := res.Header.Get("Content-Type") if ct != "" { t.Errorf("expected no Content-Type; got %s", ct) } body, err := ioutil.ReadAll(res.Body) if err != nil { t.Error(err) } if len(body) > 0 { t.Errorf("got unexpected body %q", string(body)) } }
func TestRequestBodyLimit(t *testing.T) { const limit = 1 << 20 ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { r.Body = http.MaxBytesReader(w, r.Body, limit) n, err := io.Copy(ioutil.Discard, r.Body) if err == nil { t.Errorf("expected error from io.Copy") } if n != limit { t.Errorf("io.Copy = %d, want %d", n, limit) } })) defer ts.Close() nWritten := int64(0) req, _ := http.NewRequest("POST", ts.URL, io.LimitReader(countReader{neverEnding('a'), &nWritten}, limit*200)) // Send the POST, but don't care it succeeds or not. The // remote side is going to reply and then close the TCP // connection, and HTTP doesn't really define if that's // allowed or not. Some HTTP clients will get the response // and some (like ours, currently) will complain that the // request write failed, without reading the response. // // But that's okay, since what we're really testing is that // the remote side hung up on us before we wrote too much. _, _ = http.DefaultClient.Do(req) if nWritten > limit*100 { t.Errorf("handler restricted the request body to %d bytes, but client managed to write %d", limit, nWritten) } }
// TestClientWriteShutdown tests that if the client shuts down the write // side of their TCP connection, the server doesn't send a 400 Bad Request. func TestClientWriteShutdown(t *testing.T) { ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {})) defer ts.Close() conn, err := net.Dial("tcp", ts.Listener.Addr().String()) if err != nil { t.Fatalf("Dial: %v", err) } err = conn.(*net.TCPConn).CloseWrite() if err != nil { t.Fatalf("Dial: %v", err) } donec := make(chan bool) go func() { defer close(donec) bs, err := ioutil.ReadAll(conn) if err != nil { t.Fatalf("ReadAll: %v", err) } got := string(bs) if got != "" { t.Errorf("read %q from server; want nothing", got) } }() select { case <-donec: case <-time.After(10 * time.Second): t.Fatalf("timeout") } }
// TestContentLengthZero tests that for both an HTTP/1.0 and HTTP/1.1 // request (both keep-alive), when a Handler never writes any // response, the net/http package adds a "Content-Length: 0" response // header. func TestContentLengthZero(t *testing.T) { ts := httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {})) defer ts.Close() for _, version := range []string{"HTTP/1.0", "HTTP/1.1"} { conn, err := net.Dial("tcp", ts.Listener.Addr().String()) if err != nil { t.Fatalf("error dialing: %v", err) } _, err = fmt.Fprintf(conn, "GET / %v\r\nConnection: keep-alive\r\nHost: foo\r\n\r\n", version) if err != nil { t.Fatalf("error writing: %v", err) } req, _ := http.NewRequest("GET", "/", nil) res, err := http.ReadResponse(bufio.NewReader(conn), req) if err != nil { t.Fatalf("error reading response: %v", err) } if te := res.TransferEncoding; len(te) > 0 { t.Errorf("For version %q, Transfer-Encoding = %q; want none", version, te) } if cl := res.ContentLength; cl != 0 { t.Errorf("For version %q, Content-Length = %v; want 0", version, cl) } conn.Close() } }
func testHandlerPanic(t *testing.T, withHijack bool) { // Unlike the other tests that set the log output to ioutil.Discard // to quiet the output, this test uses a pipe. The pipe serves three // purposes: // // 1) The log.Print from the http server (generated by the caught // panic) will go to the pipe instead of stderr, making the // output quiet. // // 2) We read from the pipe to verify that the handler // actually caught the panic and logged something. // // 3) The blocking Read call prevents this TestHandlerPanic // function from exiting before the HTTP server handler // finishes crashing. If this text function exited too // early (and its defer log.SetOutput(os.Stderr) ran), // then the crash output could spill into the next test. pr, pw := io.Pipe() log.SetOutput(pw) defer log.SetOutput(os.Stderr) ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { if withHijack { rwc, _, err := w.(http.Hijacker).Hijack() if err != nil { t.Logf("unexpected error: %v", err) } defer rwc.Close() } panic("intentional death for testing") })) defer ts.Close() // Do a blocking read on the log output pipe so its logging // doesn't bleed into the next test. But wait only 5 seconds // for it. done := make(chan bool, 1) go func() { buf := make([]byte, 4<<10) _, err := pr.Read(buf) pr.Close() if err != nil { t.Fatal(err) } done <- true }() _, err := http.Get(ts.URL) if err == nil { t.Logf("expected an error") } select { case <-done: return case <-time.After(5 * time.Second): t.Fatal("expected server handler to log an error") } }
// Tests that the server responds to the "Expect" request header // correctly. func TestServerExpect(t *testing.T) { ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { // Note using r.FormValue("readbody") because for POST // requests that would read from r.Body, which we only // conditionally want to do. if strings.Contains(r.URL.RawQuery, "readbody=true") { ioutil.ReadAll(r.Body) w.Write([]byte("Hi")) } else { w.WriteHeader(http.StatusUnauthorized) } })) defer ts.Close() runTest := func(test serverExpectTest) { conn, err := net.Dial("tcp", ts.Listener.Addr().String()) if err != nil { t.Fatalf("Dial: %v", err) } defer conn.Close() sendf := func(format string, args ...interface{}) { _, err := fmt.Fprintf(conn, format, args...) if err != nil { t.Fatalf("On test %#v, error writing %q: %v", test, format, err) } } go func() { sendf("POST /?readbody=%v HTTP/1.1\r\n"+ "Connection: close\r\n"+ "Content-Length: %d\r\n"+ "Expect: %s\r\nHost: foo\r\n\r\n", test.readBody, test.contentLength, test.expectation) if test.contentLength > 0 && strings.ToLower(test.expectation) != "100-continue" { body := strings.Repeat("A", test.contentLength) sendf(body) } }() bufr := bufio.NewReader(conn) line, err := bufr.ReadString('\n') if err != nil { t.Fatalf("ReadString: %v", err) } if !strings.Contains(line, test.expectedResponse) { t.Errorf("for test %#v got first line=%q", test, line) } } for _, test := range serverExpectTests { runTest(test) } }
func TestNoDate(t *testing.T) { ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { w.Header()["Date"] = nil })) defer ts.Close() res, err := http.Get(ts.URL) if err != nil { t.Fatal(err) } _, present := res.Header["Date"] if present { t.Fatalf("Expected no Date header; got %v", res.Header["Date"]) } }
func TestTimeoutHandler(t *testing.T) { sendHi := make(chan bool, 1) writeErrors := make(chan error, 1) sayHi := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { <-sendHi _, werr := w.Write([]byte("hi")) writeErrors <- werr }) timeout := make(chan time.Time, 1) // write to this to force timeouts ts := httptest.NewServer(NewTestTimeoutHandler(sayHi, timeout)) defer ts.Close() // Succeed without timing out: sendHi <- true res, err := http.Get(ts.URL) if err != nil { t.Error(err) } if g, e := res.StatusCode, http.StatusOK; g != e { t.Errorf("got res.StatusCode %d; expected %d", g, e) } body, _ := ioutil.ReadAll(res.Body) if g, e := string(body), "hi"; g != e { t.Errorf("got body %q; expected %q", g, e) } if g := <-writeErrors; g != nil { t.Errorf("got unexpected Write error on first request: %v", g) } // Times out: timeout <- time.Time{} res, err = http.Get(ts.URL) if err != nil { t.Error(err) } if g, e := res.StatusCode, http.StatusServiceUnavailable; g != e { t.Errorf("got res.StatusCode %d; expected %d", g, e) } body, _ = ioutil.ReadAll(res.Body) if !strings.Contains(string(body), "<title>Timeout</title>") { t.Errorf("expected timeout body; got %q", string(body)) } // Now make the previously-timed out handler speak again, // which verifies the panic is handled: sendHi <- true if g, e := <-writeErrors, http.ErrHandlerTimeout; g != e { t.Errorf("expected Write error of %v; got %v", e, g) } }
func TestSetsRemoteAddr(t *testing.T) { ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { fmt.Fprintf(w, "%s", r.RemoteAddr) })) defer ts.Close() res, err := http.Get(ts.URL) if err != nil { t.Fatalf("Get error: %v", err) } body, err := ioutil.ReadAll(res.Body) if err != nil { t.Fatalf("ReadAll error: %v", err) } ip := string(body) if !strings.HasPrefix(ip, "127.0.0.1:") && !strings.HasPrefix(ip, "[::1]:") { t.Fatalf("Expected local addr; got %q", ip) } }
func testTcpConnectionCloses(t *testing.T, req string, h http.Handler) { s := httptest.NewServer(h) defer s.Close() conn, err := net.Dial("tcp", s.Listener.Addr().String()) if err != nil { t.Fatal("dial error:", err) } defer conn.Close() _, err = fmt.Fprint(conn, req) if err != nil { t.Fatal("print error:", err) } r := bufio.NewReader(conn) res, err := http.ReadResponse(r, &http.Request{Method: "GET"}) if err != nil { t.Fatal("ReadResponse error:", err) } didReadAll := make(chan bool, 1) go func() { select { case <-time.After(5 * time.Second): t.Error("body not closed after 5s") return case <-didReadAll: } }() _, err = ioutil.ReadAll(r) if err != nil { t.Fatal("read error:", err) } didReadAll <- true if !res.Close { t.Errorf("Response.Close = false; want true") } }
func TestRequestLimit(t *testing.T) { ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { t.Fatalf("didn't expect to get request in Handler") })) defer ts.Close() req, _ := http.NewRequest("GET", ts.URL, nil) var bytesPerHeader = len("header12345: val12345\r\n") for i := 0; i < ((http.DefaultMaxHeaderBytes+4096)/bytesPerHeader)+1; i++ { req.Header.Set(fmt.Sprintf("header%05d", i), fmt.Sprintf("val%05d", i)) } res, err := http.DefaultClient.Do(req) if err != nil { // Some HTTP clients may fail on this undefined behavior (server replying and // closing the connection while the request is still being written), but // we do support it (at least currently), so we expect a response below. t.Fatalf("Do: %v", err) } if res.StatusCode != 413 { t.Fatalf("expected 413 response status; got: %d %s", res.StatusCode, res.Status) } }
func TestStripPrefix(t *testing.T) { h := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { w.Header().Set("X-Path", r.URL.Path) }) ts := httptest.NewServer(http.StripPrefix("/foo", h)) defer ts.Close() res, err := http.Get(ts.URL + "/foo/bar") if err != nil { t.Fatal(err) } if g, e := res.Header.Get("X-Path"), "/bar"; g != e { t.Errorf("test 1: got %s, want %s", g, e) } res, err = http.Get(ts.URL + "/bar") if err != nil { t.Fatal(err) } if g, e := res.StatusCode, 404; g != e { t.Errorf("test 2: got status %v, want %v", g, e) } }
// TestZeroLengthPostAndResponse exercises an optimization done by the Transport: // when there is no body (either because the method doesn't permit a body, or an // explicit Content-Length of zero is present), then the transport can re-use the // connection immediately. But when it re-uses the connection, it typically closes // the previous request's body, which is not optimal for zero-lengthed bodies, // as the client would then see http.ErrBodyReadAfterClose and not 0, io.EOF. func TestZeroLengthPostAndResponse(t *testing.T) { ts := httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) { all, err := ioutil.ReadAll(r.Body) if err != nil { t.Fatalf("handler ReadAll: %v", err) } if len(all) != 0 { t.Errorf("handler got %d bytes; expected 0", len(all)) } rw.Header().Set("Content-Length", "0") })) defer ts.Close() req, err := http.NewRequest("POST", ts.URL, strings.NewReader("")) if err != nil { t.Fatal(err) } req.ContentLength = 0 var resp [5]*http.Response for i := range resp { resp[i], err = http.DefaultClient.Do(req) if err != nil { t.Fatalf("client post #%d: %v", i, err) } } for i := range resp { all, err := ioutil.ReadAll(resp[i].Body) if err != nil { t.Fatalf("req #%d: client ReadAll: %v", i, err) } if len(all) != 0 { t.Errorf("req #%d: client got %d bytes; expected 0", i, len(all)) } } }
// Test304Responses verifies that 304s don't declare that they're // chunking in their response headers and aren't allowed to produce // output. func Test304Responses(t *testing.T) { ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(http.StatusNotModified) _, err := w.Write([]byte("illegal body")) if err != http.ErrBodyNotAllowed { t.Errorf("on Write, expected ErrBodyNotAllowed, got %v", err) } })) defer ts.Close() res, err := http.Get(ts.URL) if err != nil { t.Error(err) } if len(res.TransferEncoding) > 0 { t.Errorf("expected no TransferEncoding; got %v", res.TransferEncoding) } body, err := ioutil.ReadAll(res.Body) if err != nil { t.Error(err) } if len(body) > 0 { t.Errorf("got unexpected body %q", string(body)) } }
func TestChunkedResponseHeaders(t *testing.T) { log.SetOutput(ioutil.Discard) // is noisy otherwise defer log.SetOutput(os.Stderr) ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { w.Header().Set("Content-Length", "intentional gibberish") // we check that this is deleted fmt.Fprintf(w, "I am a chunked response.") })) defer ts.Close() res, err := http.Get(ts.URL) if err != nil { t.Fatalf("Get error: %v", err) } if g, e := res.ContentLength, int64(-1); g != e { t.Errorf("expected ContentLength of %d; got %d", e, g) } if g, e := res.TransferEncoding, []string{"chunked"}; !reflect.DeepEqual(g, e) { t.Errorf("expected TransferEncoding of %v; got %v", e, g) } if _, haveCL := res.Header["Content-Length"]; haveCL { t.Errorf("Unexpected Content-Length") } }
// TestIdentityResponse verifies that a handler can unset func TestIdentityResponse(t *testing.T) { handler := http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) { rw.Header().Set("Content-Length", "3") rw.Header().Set("Transfer-Encoding", req.FormValue("te")) switch { case req.FormValue("overwrite") == "1": _, err := rw.Write([]byte("foo TOO LONG")) if err != http.ErrContentLength { t.Errorf("expected ErrContentLength; got %v", err) } case req.FormValue("underwrite") == "1": rw.Header().Set("Content-Length", "500") rw.Write([]byte("too short")) default: rw.Write([]byte("foo")) } }) ts := httptest.NewServer(handler) defer ts.Close() // Note: this relies on the assumption (which is true) that // Get sends HTTP/1.1 or greater requests. Otherwise the // server wouldn't have the choice to send back chunked // responses. for _, te := range []string{"", "identity"} { url := ts.URL + "/?te=" + te res, err := http.Get(url) if err != nil { t.Fatalf("error with Get of %s: %v", url, err) } if cl, expected := res.ContentLength, int64(3); cl != expected { t.Errorf("for %s expected res.ContentLength of %d; got %d", url, expected, cl) } if cl, expected := res.Header.Get("Content-Length"), "3"; cl != expected { t.Errorf("for %s expected Content-Length header of %q; got %q", url, expected, cl) } if tl, expected := len(res.TransferEncoding), 0; tl != expected { t.Errorf("for %s expected len(res.TransferEncoding) of %d; got %d (%v)", url, expected, tl, res.TransferEncoding) } res.Body.Close() } // Verify that ErrContentLength is returned url := ts.URL + "/?overwrite=1" _, err := http.Get(url) if err != nil { t.Fatalf("error with Get of %s: %v", url, err) } // Verify that the connection is closed when the declared Content-Length // is larger than what the handler wrote. conn, err := net.Dial("tcp", ts.Listener.Addr().String()) if err != nil { t.Fatalf("error dialing: %v", err) } _, err = conn.Write([]byte("GET /?underwrite=1 HTTP/1.1\r\nHost: foo\r\n\r\n")) if err != nil { t.Fatalf("error writing: %v", err) } // The ReadAll will hang for a failing test, so use a Timer to // fail explicitly. goTimeout(t, 2*time.Second, func() { got, _ := ioutil.ReadAll(conn) expectedSuffix := "\r\n\r\ntoo short" if !strings.HasSuffix(string(got), expectedSuffix) { t.Errorf("Expected output to end with %q; got response body %q", expectedSuffix, string(got)) } }) }