diff options
Diffstat (limited to 'src/net/http/serve_test.go')
| -rw-r--r-- | src/net/http/serve_test.go | 6870 |
1 files changed, 6870 insertions, 0 deletions
diff --git a/src/net/http/serve_test.go b/src/net/http/serve_test.go new file mode 100644 index 0000000..bb380cf --- /dev/null +++ b/src/net/http/serve_test.go @@ -0,0 +1,6870 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// End-to-end serving tests + +package http_test + +import ( + "bufio" + "bytes" + "compress/gzip" + "compress/zlib" + "context" + "crypto/tls" + "encoding/json" + "errors" + "fmt" + "internal/testenv" + "io" + "log" + "math/rand" + "mime/multipart" + "net" + . "net/http" + "net/http/httptest" + "net/http/httptrace" + "net/http/httputil" + "net/http/internal" + "net/http/internal/testcert" + "net/url" + "os" + "os/exec" + "path/filepath" + "reflect" + "regexp" + "runtime" + "strconv" + "strings" + "sync" + "sync/atomic" + "syscall" + "testing" + "time" +) + +type dummyAddr string +type oneConnListener struct { + conn net.Conn +} + +func (l *oneConnListener) Accept() (c net.Conn, err error) { + c = l.conn + if c == nil { + err = io.EOF + return + } + err = nil + l.conn = nil + return +} + +func (l *oneConnListener) Close() error { + return nil +} + +func (l *oneConnListener) Addr() net.Addr { + return dummyAddr("test-address") +} + +func (a dummyAddr) Network() string { + return string(a) +} + +func (a dummyAddr) String() string { + return string(a) +} + +type noopConn struct{} + +func (noopConn) LocalAddr() net.Addr { return dummyAddr("local-addr") } +func (noopConn) RemoteAddr() net.Addr { return dummyAddr("remote-addr") } +func (noopConn) SetDeadline(t time.Time) error { return nil } +func (noopConn) SetReadDeadline(t time.Time) error { return nil } +func (noopConn) SetWriteDeadline(t time.Time) error { return nil } + +type rwTestConn struct { + io.Reader + io.Writer + noopConn + + closeFunc func() error // called if non-nil + closec chan bool // else, if non-nil, send value to it on close +} + +func (c *rwTestConn) Close() error { + if c.closeFunc != nil { + return c.closeFunc() + } + select { + case c.closec <- true: + default: + } + return nil +} + +type testConn struct { + readMu sync.Mutex // for TestHandlerBodyClose + readBuf bytes.Buffer + writeBuf bytes.Buffer + closec chan bool // if non-nil, send value to it on close + noopConn +} + +func (c *testConn) Read(b []byte) (int, error) { + c.readMu.Lock() + defer c.readMu.Unlock() + return c.readBuf.Read(b) +} + +func (c *testConn) Write(b []byte) (int, error) { + return c.writeBuf.Write(b) +} + +func (c *testConn) Close() error { + select { + case c.closec <- true: + default: + } + return nil +} + +// reqBytes treats req as a request (with \n delimiters) and returns it with \r\n delimiters, +// ending in \r\n\r\n +func reqBytes(req string) []byte { + return []byte(strings.ReplaceAll(strings.TrimSpace(req), "\n", "\r\n") + "\r\n\r\n") +} + +type handlerTest struct { + logbuf bytes.Buffer + handler Handler +} + +func newHandlerTest(h Handler) handlerTest { + return handlerTest{handler: h} +} + +func (ht *handlerTest) rawResponse(req string) string { + reqb := reqBytes(req) + var output strings.Builder + conn := &rwTestConn{ + Reader: bytes.NewReader(reqb), + Writer: &output, + closec: make(chan bool, 1), + } + ln := &oneConnListener{conn: conn} + srv := &Server{ + ErrorLog: log.New(&ht.logbuf, "", 0), + Handler: ht.handler, + } + go srv.Serve(ln) + <-conn.closec + return output.String() +} + +func TestConsumingBodyOnNextConn(t *testing.T) { + t.Parallel() + defer afterTest(t) + conn := new(testConn) + for i := 0; i < 2; i++ { + conn.readBuf.Write([]byte( + "POST / HTTP/1.1\r\n" + + "Host: test\r\n" + + "Content-Length: 11\r\n" + + "\r\n" + + "foo=1&bar=1")) + } + + reqNum := 0 + ch := make(chan *Request) + servech := make(chan error) + listener := &oneConnListener{conn} + handler := func(res ResponseWriter, req *Request) { + reqNum++ + ch <- req + } + + go func() { + servech <- Serve(listener, HandlerFunc(handler)) + }() + + var req *Request + req = <-ch + if req == nil { + t.Fatal("Got nil first request.") + } + if req.Method != "POST" { + t.Errorf("For request #1's method, got %q; expected %q", + req.Method, "POST") + } + + req = <-ch + if req == nil { + t.Fatal("Got nil first request.") + } + if req.Method != "POST" { + t.Errorf("For request #2's method, got %q; expected %q", + req.Method, "POST") + } + + if serveerr := <-servech; serveerr != io.EOF { + t.Errorf("Serve returned %q; expected EOF", serveerr) + } +} + +type stringHandler string + +func (s stringHandler) ServeHTTP(w ResponseWriter, r *Request) { + w.Header().Set("Result", string(s)) +} + +var handlers = []struct { + pattern string + msg string +}{ + {"/", "Default"}, + {"/someDir/", "someDir"}, + {"/#/", "hash"}, + {"someHost.com/someDir/", "someHost.com/someDir"}, +} + +var vtests = []struct { + url string + expected string +}{ + {"http://localhost/someDir/apage", "someDir"}, + {"http://localhost/%23/apage", "hash"}, + {"http://localhost/otherDir/apage", "Default"}, + {"http://someHost.com/someDir/apage", "someHost.com/someDir"}, + {"http://otherHost.com/someDir/apage", "someDir"}, + {"http://otherHost.com/aDir/apage", "Default"}, + // redirections for trees + {"http://localhost/someDir", "/someDir/"}, + {"http://localhost/%23", "/%23/"}, + {"http://someHost.com/someDir", "/someDir/"}, +} + +func TestHostHandlers(t *testing.T) { run(t, testHostHandlers, []testMode{http1Mode}) } +func testHostHandlers(t *testing.T, mode testMode) { + mux := NewServeMux() + for _, h := range handlers { + mux.Handle(h.pattern, stringHandler(h.msg)) + } + ts := newClientServerTest(t, mode, mux).ts + + 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 *Response + var req 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 + } + switch r.StatusCode { + case StatusOK: + s := r.Header.Get("Result") + if s != vt.expected { + t.Errorf("Get(%q) = %q, want %q", vt.url, s, vt.expected) + } + case StatusMovedPermanently: + s := r.Header.Get("Location") + if s != vt.expected { + t.Errorf("Get(%q) = %q, want %q", vt.url, s, vt.expected) + } + default: + t.Errorf("Get(%q) unhandled status code %d", vt.url, r.StatusCode) + } + } +} + +var serveMuxRegister = []struct { + pattern string + h Handler +}{ + {"/dir/", serve(200)}, + {"/search", serve(201)}, + {"codesearch.google.com/search", serve(202)}, + {"codesearch.google.com/", serve(203)}, + {"example.com/", HandlerFunc(checkQueryStringHandler)}, +} + +// serve returns a handler that sends a response with the given code. +func serve(code int) HandlerFunc { + return func(w ResponseWriter, r *Request) { + w.WriteHeader(code) + } +} + +// checkQueryStringHandler checks if r.URL.RawQuery has the same value +// as the URL excluding the scheme and the query string and sends 200 +// response code if it is, 500 otherwise. +func checkQueryStringHandler(w ResponseWriter, r *Request) { + u := *r.URL + u.Scheme = "http" + u.Host = r.Host + u.RawQuery = "" + if "http://"+r.URL.RawQuery == u.String() { + w.WriteHeader(200) + } else { + w.WriteHeader(500) + } +} + +var serveMuxTests = []struct { + method string + host string + path string + code int + pattern string +}{ + {"GET", "google.com", "/", 404, ""}, + {"GET", "google.com", "/dir", 301, "/dir/"}, + {"GET", "google.com", "/dir/", 200, "/dir/"}, + {"GET", "google.com", "/dir/file", 200, "/dir/"}, + {"GET", "google.com", "/search", 201, "/search"}, + {"GET", "google.com", "/search/", 404, ""}, + {"GET", "google.com", "/search/foo", 404, ""}, + {"GET", "codesearch.google.com", "/search", 202, "codesearch.google.com/search"}, + {"GET", "codesearch.google.com", "/search/", 203, "codesearch.google.com/"}, + {"GET", "codesearch.google.com", "/search/foo", 203, "codesearch.google.com/"}, + {"GET", "codesearch.google.com", "/", 203, "codesearch.google.com/"}, + {"GET", "codesearch.google.com:443", "/", 203, "codesearch.google.com/"}, + {"GET", "images.google.com", "/search", 201, "/search"}, + {"GET", "images.google.com", "/search/", 404, ""}, + {"GET", "images.google.com", "/search/foo", 404, ""}, + {"GET", "google.com", "/../search", 301, "/search"}, + {"GET", "google.com", "/dir/..", 301, ""}, + {"GET", "google.com", "/dir/..", 301, ""}, + {"GET", "google.com", "/dir/./file", 301, "/dir/"}, + + // The /foo -> /foo/ redirect applies to CONNECT requests + // but the path canonicalization does not. + {"CONNECT", "google.com", "/dir", 301, "/dir/"}, + {"CONNECT", "google.com", "/../search", 404, ""}, + {"CONNECT", "google.com", "/dir/..", 200, "/dir/"}, + {"CONNECT", "google.com", "/dir/..", 200, "/dir/"}, + {"CONNECT", "google.com", "/dir/./file", 200, "/dir/"}, +} + +func TestServeMuxHandler(t *testing.T) { + setParallel(t) + mux := NewServeMux() + for _, e := range serveMuxRegister { + mux.Handle(e.pattern, e.h) + } + + for _, tt := range serveMuxTests { + r := &Request{ + Method: tt.method, + Host: tt.host, + URL: &url.URL{ + Path: tt.path, + }, + } + h, pattern := mux.Handler(r) + rr := httptest.NewRecorder() + h.ServeHTTP(rr, r) + if pattern != tt.pattern || rr.Code != tt.code { + t.Errorf("%s %s %s = %d, %q, want %d, %q", tt.method, tt.host, tt.path, rr.Code, pattern, tt.code, tt.pattern) + } + } +} + +// Issue 24297 +func TestServeMuxHandleFuncWithNilHandler(t *testing.T) { + setParallel(t) + defer func() { + if err := recover(); err == nil { + t.Error("expected call to mux.HandleFunc to panic") + } + }() + mux := NewServeMux() + mux.HandleFunc("/", nil) +} + +var serveMuxTests2 = []struct { + method string + host string + url string + code int + redirOk bool +}{ + {"GET", "google.com", "/", 404, false}, + {"GET", "example.com", "/test/?example.com/test/", 200, false}, + {"GET", "example.com", "test/?example.com/test/", 200, true}, +} + +// TestServeMuxHandlerRedirects tests that automatic redirects generated by +// mux.Handler() shouldn't clear the request's query string. +func TestServeMuxHandlerRedirects(t *testing.T) { + setParallel(t) + mux := NewServeMux() + for _, e := range serveMuxRegister { + mux.Handle(e.pattern, e.h) + } + + for _, tt := range serveMuxTests2 { + tries := 1 // expect at most 1 redirection if redirOk is true. + turl := tt.url + for { + u, e := url.Parse(turl) + if e != nil { + t.Fatal(e) + } + r := &Request{ + Method: tt.method, + Host: tt.host, + URL: u, + } + h, _ := mux.Handler(r) + rr := httptest.NewRecorder() + h.ServeHTTP(rr, r) + if rr.Code != 301 { + if rr.Code != tt.code { + t.Errorf("%s %s %s = %d, want %d", tt.method, tt.host, tt.url, rr.Code, tt.code) + } + break + } + if !tt.redirOk { + t.Errorf("%s %s %s, unexpected redirect", tt.method, tt.host, tt.url) + break + } + turl = rr.HeaderMap.Get("Location") + tries-- + } + if tries < 0 { + t.Errorf("%s %s %s, too many redirects", tt.method, tt.host, tt.url) + } + } +} + +// Tests for https://golang.org/issue/900 +func TestMuxRedirectLeadingSlashes(t *testing.T) { + setParallel(t) + paths := []string{"//foo.txt", "///foo.txt", "/../../foo.txt"} + for _, path := range paths { + req, err := ReadRequest(bufio.NewReader(strings.NewReader("GET " + path + " HTTP/1.1\r\nHost: test\r\n\r\n"))) + if err != nil { + t.Errorf("%s", err) + } + mux := NewServeMux() + resp := httptest.NewRecorder() + + mux.ServeHTTP(resp, req) + + if loc, expected := resp.Header().Get("Location"), "/foo.txt"; loc != expected { + t.Errorf("Expected Location header set to %q; got %q", expected, loc) + return + } + + if code, expected := resp.Code, StatusMovedPermanently; code != expected { + t.Errorf("Expected response code of StatusMovedPermanently; got %d", code) + return + } + } +} + +// Test that the special cased "/route" redirect +// implicitly created by a registered "/route/" +// properly sets the query string in the redirect URL. +// See Issue 17841. +func TestServeWithSlashRedirectKeepsQueryString(t *testing.T) { + run(t, testServeWithSlashRedirectKeepsQueryString, []testMode{http1Mode}) +} +func testServeWithSlashRedirectKeepsQueryString(t *testing.T, mode testMode) { + writeBackQuery := func(w ResponseWriter, r *Request) { + fmt.Fprintf(w, "%s", r.URL.RawQuery) + } + + mux := NewServeMux() + mux.HandleFunc("/testOne", writeBackQuery) + mux.HandleFunc("/testTwo/", writeBackQuery) + mux.HandleFunc("/testThree", writeBackQuery) + mux.HandleFunc("/testThree/", func(w ResponseWriter, r *Request) { + fmt.Fprintf(w, "%s:bar", r.URL.RawQuery) + }) + + ts := newClientServerTest(t, mode, mux).ts + + tests := [...]struct { + path string + method string + want string + statusOk bool + }{ + 0: {"/testOne?this=that", "GET", "this=that", true}, + 1: {"/testTwo?foo=bar", "GET", "foo=bar", true}, + 2: {"/testTwo?a=1&b=2&a=3", "GET", "a=1&b=2&a=3", true}, + 3: {"/testTwo?", "GET", "", true}, + 4: {"/testThree?foo", "GET", "foo", true}, + 5: {"/testThree/?foo", "GET", "foo:bar", true}, + 6: {"/testThree?foo", "CONNECT", "foo", true}, + 7: {"/testThree/?foo", "CONNECT", "foo:bar", true}, + + // canonicalization or not + 8: {"/testOne/foo/..?foo", "GET", "foo", true}, + 9: {"/testOne/foo/..?foo", "CONNECT", "404 page not found\n", false}, + } + + for i, tt := range tests { + req, _ := NewRequest(tt.method, ts.URL+tt.path, nil) + res, err := ts.Client().Do(req) + if err != nil { + continue + } + slurp, _ := io.ReadAll(res.Body) + res.Body.Close() + if !tt.statusOk { + if got, want := res.StatusCode, 404; got != want { + t.Errorf("#%d: Status = %d; want = %d", i, got, want) + } + } + if got, want := string(slurp), tt.want; got != want { + t.Errorf("#%d: Body = %q; want = %q", i, got, want) + } + } +} + +func TestServeWithSlashRedirectForHostPatterns(t *testing.T) { + setParallel(t) + + mux := NewServeMux() + mux.Handle("example.com/pkg/foo/", stringHandler("example.com/pkg/foo/")) + mux.Handle("example.com/pkg/bar", stringHandler("example.com/pkg/bar")) + mux.Handle("example.com/pkg/bar/", stringHandler("example.com/pkg/bar/")) + mux.Handle("example.com:3000/pkg/connect/", stringHandler("example.com:3000/pkg/connect/")) + mux.Handle("example.com:9000/", stringHandler("example.com:9000/")) + mux.Handle("/pkg/baz/", stringHandler("/pkg/baz/")) + + tests := []struct { + method string + url string + code int + loc string + want string + }{ + {"GET", "http://example.com/", 404, "", ""}, + {"GET", "http://example.com/pkg/foo", 301, "/pkg/foo/", ""}, + {"GET", "http://example.com/pkg/bar", 200, "", "example.com/pkg/bar"}, + {"GET", "http://example.com/pkg/bar/", 200, "", "example.com/pkg/bar/"}, + {"GET", "http://example.com/pkg/baz", 301, "/pkg/baz/", ""}, + {"GET", "http://example.com:3000/pkg/foo", 301, "/pkg/foo/", ""}, + {"CONNECT", "http://example.com/", 404, "", ""}, + {"CONNECT", "http://example.com:3000/", 404, "", ""}, + {"CONNECT", "http://example.com:9000/", 200, "", "example.com:9000/"}, + {"CONNECT", "http://example.com/pkg/foo", 301, "/pkg/foo/", ""}, + {"CONNECT", "http://example.com:3000/pkg/foo", 404, "", ""}, + {"CONNECT", "http://example.com:3000/pkg/baz", 301, "/pkg/baz/", ""}, + {"CONNECT", "http://example.com:3000/pkg/connect", 301, "/pkg/connect/", ""}, + } + + for i, tt := range tests { + req, _ := NewRequest(tt.method, tt.url, nil) + w := httptest.NewRecorder() + mux.ServeHTTP(w, req) + + if got, want := w.Code, tt.code; got != want { + t.Errorf("#%d: Status = %d; want = %d", i, got, want) + } + + if tt.code == 301 { + if got, want := w.HeaderMap.Get("Location"), tt.loc; got != want { + t.Errorf("#%d: Location = %q; want = %q", i, got, want) + } + } else { + if got, want := w.HeaderMap.Get("Result"), tt.want; got != want { + t.Errorf("#%d: Result = %q; want = %q", i, got, want) + } + } + } +} + +func TestShouldRedirectConcurrency(t *testing.T) { run(t, testShouldRedirectConcurrency) } +func testShouldRedirectConcurrency(t *testing.T, mode testMode) { + mux := NewServeMux() + newClientServerTest(t, mode, mux) + mux.HandleFunc("/", func(w ResponseWriter, r *Request) {}) +} + +func BenchmarkServeMux(b *testing.B) { benchmarkServeMux(b, true) } +func BenchmarkServeMux_SkipServe(b *testing.B) { benchmarkServeMux(b, false) } +func benchmarkServeMux(b *testing.B, runHandler bool) { + type test struct { + path string + code int + req *Request + } + + // Build example handlers and requests + var tests []test + endpoints := []string{"search", "dir", "file", "change", "count", "s"} + for _, e := range endpoints { + for i := 200; i < 230; i++ { + p := fmt.Sprintf("/%s/%d/", e, i) + tests = append(tests, test{ + path: p, + code: i, + req: &Request{Method: "GET", Host: "localhost", URL: &url.URL{Path: p}}, + }) + } + } + mux := NewServeMux() + for _, tt := range tests { + mux.Handle(tt.path, serve(tt.code)) + } + + rw := httptest.NewRecorder() + b.ReportAllocs() + b.ResetTimer() + for i := 0; i < b.N; i++ { + for _, tt := range tests { + *rw = httptest.ResponseRecorder{} + h, pattern := mux.Handler(tt.req) + if runHandler { + h.ServeHTTP(rw, tt.req) + if pattern != tt.path || rw.Code != tt.code { + b.Fatalf("got %d, %q, want %d, %q", rw.Code, pattern, tt.code, tt.path) + } + } + } + } +} + +func TestServerTimeouts(t *testing.T) { run(t, testServerTimeouts, []testMode{http1Mode}) } +func testServerTimeouts(t *testing.T, mode testMode) { + // Try three times, with increasing timeouts. + tries := []time.Duration{250 * time.Millisecond, 500 * time.Millisecond, 1 * time.Second} + for i, timeout := range tries { + err := testServerTimeoutsWithTimeout(t, timeout, mode) + if err == nil { + return + } + t.Logf("failed at %v: %v", timeout, err) + if i != len(tries)-1 { + t.Logf("retrying at %v ...", tries[i+1]) + } + } + t.Fatal("all attempts failed") +} + +func testServerTimeoutsWithTimeout(t *testing.T, timeout time.Duration, mode testMode) error { + reqNum := 0 + ts := newClientServerTest(t, mode, HandlerFunc(func(res ResponseWriter, req *Request) { + reqNum++ + fmt.Fprintf(res, "req=%d", reqNum) + }), func(ts *httptest.Server) { + ts.Config.ReadTimeout = timeout + ts.Config.WriteTimeout = timeout + }).ts + + // Hit the HTTP server successfully. + c := ts.Client() + r, err := c.Get(ts.URL) + if err != nil { + return fmt.Errorf("http Get #1: %v", err) + } + got, err := io.ReadAll(r.Body) + expected := "req=1" + if string(got) != expected || err != nil { + return fmt.Errorf("Unexpected response for request #1; got %q ,%v; expected %q, nil", + string(got), err, expected) + } + + // Slow client that should timeout. + t1 := time.Now() + conn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + return fmt.Errorf("Dial: %v", err) + } + buf := make([]byte, 1) + n, err := conn.Read(buf) + conn.Close() + latency := time.Since(t1) + if n != 0 || err != io.EOF { + return fmt.Errorf("Read = %v, %v, wanted %v, %v", n, err, 0, io.EOF) + } + minLatency := timeout / 5 * 4 + if latency < minLatency { + return fmt.Errorf("got EOF after %s, want >= %s", latency, minLatency) + } + + // Hit the HTTP server successfully again, verifying that the + // previous slow connection didn't run our handler. (that we + // get "req=2", not "req=3") + r, err = c.Get(ts.URL) + if err != nil { + return fmt.Errorf("http Get #2: %v", err) + } + got, err = io.ReadAll(r.Body) + r.Body.Close() + expected = "req=2" + if string(got) != expected || err != nil { + return fmt.Errorf("Get #2 got %q, %v, want %q, nil", string(got), err, expected) + } + + if !testing.Short() { + conn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + return fmt.Errorf("long Dial: %v", err) + } + defer conn.Close() + go io.Copy(io.Discard, conn) + for i := 0; i < 5; i++ { + _, err := conn.Write([]byte("GET / HTTP/1.1\r\nHost: foo\r\n\r\n")) + if err != nil { + return fmt.Errorf("on write %d: %v", i, err) + } + time.Sleep(timeout / 2) + } + } + return nil +} + +func TestServerReadTimeout(t *testing.T) { run(t, testServerReadTimeout) } +func testServerReadTimeout(t *testing.T, mode testMode) { + respBody := "response body" + for timeout := 5 * time.Millisecond; ; timeout *= 2 { + cst := newClientServerTest(t, mode, HandlerFunc(func(res ResponseWriter, req *Request) { + _, err := io.Copy(io.Discard, req.Body) + if !errors.Is(err, os.ErrDeadlineExceeded) { + t.Errorf("server timed out reading request body: got err %v; want os.ErrDeadlineExceeded", err) + } + res.Write([]byte(respBody)) + }), func(ts *httptest.Server) { + ts.Config.ReadHeaderTimeout = -1 // don't time out while reading headers + ts.Config.ReadTimeout = timeout + }) + pr, pw := io.Pipe() + res, err := cst.c.Post(cst.ts.URL, "text/apocryphal", pr) + if err != nil { + t.Logf("Get error, retrying: %v", err) + cst.close() + continue + } + defer res.Body.Close() + got, err := io.ReadAll(res.Body) + if string(got) != respBody || err != nil { + t.Errorf("client read response body: %q, %v; want %q, nil", string(got), err, respBody) + } + pw.Close() + break + } +} + +func TestServerWriteTimeout(t *testing.T) { run(t, testServerWriteTimeout) } +func testServerWriteTimeout(t *testing.T, mode testMode) { + for timeout := 5 * time.Millisecond; ; timeout *= 2 { + errc := make(chan error, 2) + cst := newClientServerTest(t, mode, HandlerFunc(func(res ResponseWriter, req *Request) { + errc <- nil + _, err := io.Copy(res, neverEnding('a')) + errc <- err + }), func(ts *httptest.Server) { + ts.Config.WriteTimeout = timeout + }) + res, err := cst.c.Get(cst.ts.URL) + if err != nil { + // Probably caused by the write timeout expiring before the handler runs. + t.Logf("Get error, retrying: %v", err) + cst.close() + continue + } + defer res.Body.Close() + _, err = io.Copy(io.Discard, res.Body) + if err == nil { + t.Errorf("client reading from truncated request body: got nil error, want non-nil") + } + select { + case <-errc: + err = <-errc // io.Copy error + if !errors.Is(err, os.ErrDeadlineExceeded) { + t.Errorf("server timed out writing request body: got err %v; want os.ErrDeadlineExceeded", err) + } + return + default: + // The write timeout expired before the handler started. + t.Logf("handler didn't run, retrying") + cst.close() + } + } +} + +// Test that the HTTP/2 server handles Server.WriteTimeout (Issue 18437) +func TestWriteDeadlineExtendedOnNewRequest(t *testing.T) { + run(t, testWriteDeadlineExtendedOnNewRequest) +} +func testWriteDeadlineExtendedOnNewRequest(t *testing.T, mode testMode) { + if testing.Short() { + t.Skip("skipping in short mode") + } + ts := newClientServerTest(t, mode, HandlerFunc(func(res ResponseWriter, req *Request) {}), + func(ts *httptest.Server) { + ts.Config.WriteTimeout = 250 * time.Millisecond + }, + ).ts + + c := ts.Client() + + for i := 1; i <= 3; i++ { + req, err := NewRequest("GET", ts.URL, nil) + if err != nil { + t.Fatal(err) + } + + r, err := c.Do(req) + if err != nil { + t.Fatalf("http2 Get #%d: %v", i, err) + } + r.Body.Close() + time.Sleep(ts.Config.WriteTimeout / 2) + } +} + +// tryTimeouts runs testFunc with increasing timeouts. Test passes on first success, +// and fails if all timeouts fail. +func tryTimeouts(t *testing.T, testFunc func(timeout time.Duration) error) { + tries := []time.Duration{250 * time.Millisecond, 500 * time.Millisecond, 1 * time.Second} + for i, timeout := range tries { + err := testFunc(timeout) + if err == nil { + return + } + t.Logf("failed at %v: %v", timeout, err) + if i != len(tries)-1 { + t.Logf("retrying at %v ...", tries[i+1]) + } + } + t.Fatal("all attempts failed") +} + +// Test that the HTTP/2 server RSTs stream on slow write. +func TestWriteDeadlineEnforcedPerStream(t *testing.T) { + if testing.Short() { + t.Skip("skipping in short mode") + } + setParallel(t) + run(t, func(t *testing.T, mode testMode) { + tryTimeouts(t, func(timeout time.Duration) error { + return testWriteDeadlineEnforcedPerStream(t, mode, timeout) + }) + }) +} + +func testWriteDeadlineEnforcedPerStream(t *testing.T, mode testMode, timeout time.Duration) error { + reqNum := 0 + ts := newClientServerTest(t, mode, HandlerFunc(func(res ResponseWriter, req *Request) { + reqNum++ + if reqNum == 1 { + return // first request succeeds + } + time.Sleep(timeout) // second request times out + }), func(ts *httptest.Server) { + ts.Config.WriteTimeout = timeout / 2 + }).ts + + c := ts.Client() + + req, err := NewRequest("GET", ts.URL, nil) + if err != nil { + return fmt.Errorf("NewRequest: %v", err) + } + r, err := c.Do(req) + if err != nil { + return fmt.Errorf("Get #1: %v", err) + } + r.Body.Close() + + req, err = NewRequest("GET", ts.URL, nil) + if err != nil { + return fmt.Errorf("NewRequest: %v", err) + } + r, err = c.Do(req) + if err == nil { + r.Body.Close() + return fmt.Errorf("Get #2 expected error, got nil") + } + if mode == http2Mode { + expected := "stream ID 3; INTERNAL_ERROR" // client IDs are odd, second stream should be 3 + if !strings.Contains(err.Error(), expected) { + return fmt.Errorf("http2 Get #2: expected error to contain %q, got %q", expected, err) + } + } + return nil +} + +// Test that the HTTP/2 server does not send RST when WriteDeadline not set. +func TestNoWriteDeadline(t *testing.T) { + if testing.Short() { + t.Skip("skipping in short mode") + } + setParallel(t) + defer afterTest(t) + run(t, func(t *testing.T, mode testMode) { + tryTimeouts(t, func(timeout time.Duration) error { + return testNoWriteDeadline(t, mode, timeout) + }) + }) +} + +func testNoWriteDeadline(t *testing.T, mode testMode, timeout time.Duration) error { + reqNum := 0 + ts := newClientServerTest(t, mode, HandlerFunc(func(res ResponseWriter, req *Request) { + reqNum++ + if reqNum == 1 { + return // first request succeeds + } + time.Sleep(timeout) // second request timesout + })).ts + + c := ts.Client() + + for i := 0; i < 2; i++ { + req, err := NewRequest("GET", ts.URL, nil) + if err != nil { + return fmt.Errorf("NewRequest: %v", err) + } + r, err := c.Do(req) + if err != nil { + return fmt.Errorf("Get #%d: %v", i, err) + } + r.Body.Close() + } + return nil +} + +// golang.org/issue/4741 -- setting only a write timeout that triggers +// shouldn't cause a handler to block forever on reads (next HTTP +// request) that will never happen. +func TestOnlyWriteTimeout(t *testing.T) { run(t, testOnlyWriteTimeout, []testMode{http1Mode}) } +func testOnlyWriteTimeout(t *testing.T, mode testMode) { + var ( + mu sync.RWMutex + conn net.Conn + ) + var afterTimeoutErrc = make(chan error, 1) + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, req *Request) { + buf := make([]byte, 512<<10) + _, err := w.Write(buf) + if err != nil { + t.Errorf("handler Write error: %v", err) + return + } + mu.RLock() + defer mu.RUnlock() + if conn == nil { + t.Error("no established connection found") + return + } + conn.SetWriteDeadline(time.Now().Add(-30 * time.Second)) + _, err = w.Write(buf) + afterTimeoutErrc <- err + }), func(ts *httptest.Server) { + ts.Listener = trackLastConnListener{ts.Listener, &mu, &conn} + }).ts + + c := ts.Client() + + err := func() error { + res, err := c.Get(ts.URL) + if err != nil { + return err + } + _, err = io.Copy(io.Discard, res.Body) + res.Body.Close() + return err + }() + if err == nil { + t.Errorf("expected an error copying body from Get request") + } + + if err := <-afterTimeoutErrc; err == nil { + t.Error("expected write error after timeout") + } +} + +// trackLastConnListener tracks the last net.Conn that was accepted. +type trackLastConnListener struct { + net.Listener + + mu *sync.RWMutex + last *net.Conn // destination +} + +func (l trackLastConnListener) Accept() (c net.Conn, err error) { + c, err = l.Listener.Accept() + if err == nil { + l.mu.Lock() + *l.last = c + l.mu.Unlock() + } + return +} + +// TestIdentityResponse verifies that a handler can unset +func TestIdentityResponse(t *testing.T) { run(t, testIdentityResponse) } +func testIdentityResponse(t *testing.T, mode testMode) { + if mode == http2Mode { + t.Skip("https://go.dev/issue/56019") + } + + handler := HandlerFunc(func(rw ResponseWriter, req *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 != 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 := newClientServerTest(t, mode, handler).ts + c := ts.Client() + + // 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 := c.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" + res, err := c.Get(url) + if err != nil { + t.Fatalf("error with Get of %s: %v", url, err) + } + res.Body.Close() + + if mode != http1Mode { + return + } + + // 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. + got, _ := io.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)) + } +} + +func testTCPConnectionCloses(t *testing.T, req string, h Handler) { + setParallel(t) + s := newClientServerTest(t, http1Mode, h).ts + + 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 := ReadResponse(r, &Request{Method: "GET"}) + if err != nil { + t.Fatal("ReadResponse error:", err) + } + + _, err = io.ReadAll(r) + if err != nil { + t.Fatal("read error:", err) + } + + if !res.Close { + t.Errorf("Response.Close = false; want true") + } +} + +func testTCPConnectionStaysOpen(t *testing.T, req string, handler Handler) { + setParallel(t) + ts := newClientServerTest(t, http1Mode, handler).ts + conn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatal(err) + } + defer conn.Close() + br := bufio.NewReader(conn) + for i := 0; i < 2; i++ { + if _, err := io.WriteString(conn, req); err != nil { + t.Fatal(err) + } + res, err := ReadResponse(br, nil) + if err != nil { + t.Fatalf("res %d: %v", i+1, err) + } + if _, err := io.Copy(io.Discard, res.Body); err != nil { + t.Fatalf("res %d body copy: %v", i+1, err) + } + res.Body.Close() + } +} + +// TestServeHTTP10Close verifies that HTTP/1.0 requests won't be kept alive. +func TestServeHTTP10Close(t *testing.T) { + testTCPConnectionCloses(t, "GET / HTTP/1.0\r\n\r\n", HandlerFunc(func(w ResponseWriter, r *Request) { + ServeFile(w, r, "testdata/file") + })) +} + +// TestClientCanClose verifies that clients can also force a connection to close. +func TestClientCanClose(t *testing.T) { + testTCPConnectionCloses(t, "GET / HTTP/1.1\r\nHost: foo\r\nConnection: close\r\n\r\n", HandlerFunc(func(w ResponseWriter, r *Request) { + // Nothing. + })) +} + +// TestHandlersCanSetConnectionClose verifies that handlers can force a connection to close, +// even for HTTP/1.1 requests. +func TestHandlersCanSetConnectionClose11(t *testing.T) { + testTCPConnectionCloses(t, "GET / HTTP/1.1\r\nHost: foo\r\n\r\n\r\n", HandlerFunc(func(w ResponseWriter, r *Request) { + w.Header().Set("Connection", "close") + })) +} + +func TestHandlersCanSetConnectionClose10(t *testing.T) { + testTCPConnectionCloses(t, "GET / HTTP/1.0\r\nConnection: keep-alive\r\n\r\n", HandlerFunc(func(w ResponseWriter, r *Request) { + w.Header().Set("Connection", "close") + })) +} + +func TestHTTP2UpgradeClosesConnection(t *testing.T) { + testTCPConnectionCloses(t, "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n", HandlerFunc(func(w ResponseWriter, r *Request) { + // Nothing. (if not hijacked, the server should close the connection + // afterwards) + })) +} + +func send204(w ResponseWriter, r *Request) { w.WriteHeader(204) } +func send304(w ResponseWriter, r *Request) { w.WriteHeader(304) } + +// Issue 15647: 204 responses can't have bodies, so HTTP/1.0 keep-alive conns should stay open. +func TestHTTP10KeepAlive204Response(t *testing.T) { + testTCPConnectionStaysOpen(t, "GET / HTTP/1.0\r\nConnection: keep-alive\r\n\r\n", HandlerFunc(send204)) +} + +func TestHTTP11KeepAlive204Response(t *testing.T) { + testTCPConnectionStaysOpen(t, "GET / HTTP/1.1\r\nHost: foo\r\n\r\n", HandlerFunc(send204)) +} + +func TestHTTP10KeepAlive304Response(t *testing.T) { + testTCPConnectionStaysOpen(t, + "GET / HTTP/1.0\r\nConnection: keep-alive\r\nIf-Modified-Since: Mon, 02 Jan 2006 15:04:05 GMT\r\n\r\n", + HandlerFunc(send304)) +} + +// Issue 15703 +func TestKeepAliveFinalChunkWithEOF(t *testing.T) { run(t, testKeepAliveFinalChunkWithEOF) } +func testKeepAliveFinalChunkWithEOF(t *testing.T, mode testMode) { + cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + w.(Flusher).Flush() // force chunked encoding + w.Write([]byte("{\"Addr\": \"" + r.RemoteAddr + "\"}")) + })) + type data struct { + Addr string + } + var addrs [2]data + for i := range addrs { + res, err := cst.c.Get(cst.ts.URL) + if err != nil { + t.Fatal(err) + } + if err := json.NewDecoder(res.Body).Decode(&addrs[i]); err != nil { + t.Fatal(err) + } + if addrs[i].Addr == "" { + t.Fatal("no address") + } + res.Body.Close() + } + if addrs[0] != addrs[1] { + t.Fatalf("connection not reused") + } +} + +func TestSetsRemoteAddr(t *testing.T) { run(t, testSetsRemoteAddr) } +func testSetsRemoteAddr(t *testing.T, mode testMode) { + cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + fmt.Fprintf(w, "%s", r.RemoteAddr) + })) + + res, err := cst.c.Get(cst.ts.URL) + if err != nil { + t.Fatalf("Get error: %v", err) + } + body, err := io.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) + } +} + +type blockingRemoteAddrListener struct { + net.Listener + conns chan<- net.Conn +} + +func (l *blockingRemoteAddrListener) Accept() (net.Conn, error) { + c, err := l.Listener.Accept() + if err != nil { + return nil, err + } + brac := &blockingRemoteAddrConn{ + Conn: c, + addrs: make(chan net.Addr, 1), + } + l.conns <- brac + return brac, nil +} + +type blockingRemoteAddrConn struct { + net.Conn + addrs chan net.Addr +} + +func (c *blockingRemoteAddrConn) RemoteAddr() net.Addr { + return <-c.addrs +} + +// Issue 12943 +func TestServerAllowsBlockingRemoteAddr(t *testing.T) { + run(t, testServerAllowsBlockingRemoteAddr, []testMode{http1Mode}) +} +func testServerAllowsBlockingRemoteAddr(t *testing.T, mode testMode) { + conns := make(chan net.Conn) + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + fmt.Fprintf(w, "RA:%s", r.RemoteAddr) + }), func(ts *httptest.Server) { + ts.Listener = &blockingRemoteAddrListener{ + Listener: ts.Listener, + conns: conns, + } + }).ts + + c := ts.Client() + // Force separate connection for each: + c.Transport.(*Transport).DisableKeepAlives = true + + fetch := func(num int, response chan<- string) { + resp, err := c.Get(ts.URL) + if err != nil { + t.Errorf("Request %d: %v", num, err) + response <- "" + return + } + defer resp.Body.Close() + body, err := io.ReadAll(resp.Body) + if err != nil { + t.Errorf("Request %d: %v", num, err) + response <- "" + return + } + response <- string(body) + } + + // Start a request. The server will block on getting conn.RemoteAddr. + response1c := make(chan string, 1) + go fetch(1, response1c) + + // Wait for the server to accept it; grab the connection. + conn1 := <-conns + + // Start another request and grab its connection + response2c := make(chan string, 1) + go fetch(2, response2c) + conn2 := <-conns + + // Send a response on connection 2. + conn2.(*blockingRemoteAddrConn).addrs <- &net.TCPAddr{ + IP: net.ParseIP("12.12.12.12"), Port: 12} + + // ... and see it + response2 := <-response2c + if g, e := response2, "RA:12.12.12.12:12"; g != e { + t.Fatalf("response 2 addr = %q; want %q", g, e) + } + + // Finish the first response. + conn1.(*blockingRemoteAddrConn).addrs <- &net.TCPAddr{ + IP: net.ParseIP("21.21.21.21"), Port: 21} + + // ... and see it + response1 := <-response1c + if g, e := response1, "RA:21.21.21.21:21"; g != e { + t.Fatalf("response 1 addr = %q; want %q", g, e) + } +} + +// TestHeadResponses verifies that all MIME type sniffing and Content-Length +// counting of GET requests also happens on HEAD requests. +func TestHeadResponses(t *testing.T) { run(t, testHeadResponses) } +func testHeadResponses(t *testing.T, mode testMode) { + cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + _, err := w.Write([]byte("<html>")) + if err != nil { + t.Errorf("ResponseWriter.Write: %v", err) + } + + // Also exercise the ReaderFrom path + _, err = io.Copy(w, strings.NewReader("789a")) + if err != nil { + t.Errorf("Copy(ResponseWriter, ...): %v", err) + } + })) + res, err := cst.c.Head(cst.ts.URL) + if err != nil { + t.Error(err) + } + if len(res.TransferEncoding) > 0 { + t.Errorf("expected no TransferEncoding; got %v", res.TransferEncoding) + } + if ct := res.Header.Get("Content-Type"); ct != "text/html; charset=utf-8" { + t.Errorf("Content-Type: %q; want text/html; charset=utf-8", ct) + } + if v := res.ContentLength; v != 10 { + t.Errorf("Content-Length: %d; want 10", v) + } + body, err := io.ReadAll(res.Body) + if err != nil { + t.Error(err) + } + if len(body) > 0 { + t.Errorf("got unexpected body %q", string(body)) + } +} + +func TestTLSHandshakeTimeout(t *testing.T) { + run(t, testTLSHandshakeTimeout, []testMode{https1Mode, http2Mode}) +} +func testTLSHandshakeTimeout(t *testing.T, mode testMode) { + errc := make(chanWriter, 10) // but only expecting 1 + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {}), + func(ts *httptest.Server) { + ts.Config.ReadTimeout = 250 * time.Millisecond + ts.Config.ErrorLog = log.New(errc, "", 0) + }, + ).ts + conn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatalf("Dial: %v", err) + } + defer conn.Close() + + var buf [1]byte + n, err := conn.Read(buf[:]) + if err == nil || n != 0 { + t.Errorf("Read = %d, %v; want an error and no bytes", n, err) + } + + v := <-errc + if !strings.Contains(v, "timeout") && !strings.Contains(v, "TLS handshake") { + t.Errorf("expected a TLS handshake timeout error; got %q", v) + } +} + +func TestTLSServer(t *testing.T) { run(t, testTLSServer, []testMode{https1Mode, http2Mode}) } +func testTLSServer(t *testing.T, mode testMode) { + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + if r.TLS != nil { + w.Header().Set("X-TLS-Set", "true") + if r.TLS.HandshakeComplete { + w.Header().Set("X-TLS-HandshakeComplete", "true") + } + } + }), func(ts *httptest.Server) { + ts.Config.ErrorLog = log.New(io.Discard, "", 0) + }).ts + + // Connect an idle TCP connection to this server before we run + // our real tests. This idle connection used to block forever + // in the TLS handshake, preventing future connections from + // being accepted. It may prevent future accidental blocking + // in newConn. + idleConn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatalf("Dial: %v", err) + } + defer idleConn.Close() + + if !strings.HasPrefix(ts.URL, "https://") { + t.Errorf("expected test TLS server to start with https://, got %q", ts.URL) + return + } + client := ts.Client() + res, err := client.Get(ts.URL) + if err != nil { + t.Error(err) + return + } + if res == nil { + t.Errorf("got nil Response") + return + } + defer res.Body.Close() + if res.Header.Get("X-TLS-Set") != "true" { + t.Errorf("expected X-TLS-Set response header") + return + } + if res.Header.Get("X-TLS-HandshakeComplete") != "true" { + t.Errorf("expected X-TLS-HandshakeComplete header") + } +} + +func TestServeTLS(t *testing.T) { + CondSkipHTTP2(t) + // Not parallel: uses global test hooks. + defer afterTest(t) + defer SetTestHookServerServe(nil) + + cert, err := tls.X509KeyPair(testcert.LocalhostCert, testcert.LocalhostKey) + if err != nil { + t.Fatal(err) + } + tlsConf := &tls.Config{ + Certificates: []tls.Certificate{cert}, + } + + ln := newLocalListener(t) + defer ln.Close() + addr := ln.Addr().String() + + serving := make(chan bool, 1) + SetTestHookServerServe(func(s *Server, ln net.Listener) { + serving <- true + }) + handler := HandlerFunc(func(w ResponseWriter, r *Request) {}) + s := &Server{ + Addr: addr, + TLSConfig: tlsConf, + Handler: handler, + } + errc := make(chan error, 1) + go func() { errc <- s.ServeTLS(ln, "", "") }() + select { + case err := <-errc: + t.Fatalf("ServeTLS: %v", err) + case <-serving: + } + + c, err := tls.Dial("tcp", ln.Addr().String(), &tls.Config{ + InsecureSkipVerify: true, + NextProtos: []string{"h2", "http/1.1"}, + }) + if err != nil { + t.Fatal(err) + } + defer c.Close() + if got, want := c.ConnectionState().NegotiatedProtocol, "h2"; got != want { + t.Errorf("NegotiatedProtocol = %q; want %q", got, want) + } + if got, want := c.ConnectionState().NegotiatedProtocolIsMutual, true; got != want { + t.Errorf("NegotiatedProtocolIsMutual = %v; want %v", got, want) + } +} + +// Test that the HTTPS server nicely rejects plaintext HTTP/1.x requests. +func TestTLSServerRejectHTTPRequests(t *testing.T) { + run(t, testTLSServerRejectHTTPRequests, []testMode{https1Mode, http2Mode}) +} +func testTLSServerRejectHTTPRequests(t *testing.T, mode testMode) { + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + t.Error("unexpected HTTPS request") + }), func(ts *httptest.Server) { + var errBuf bytes.Buffer + ts.Config.ErrorLog = log.New(&errBuf, "", 0) + }).ts + conn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatal(err) + } + defer conn.Close() + io.WriteString(conn, "GET / HTTP/1.1\r\nHost: foo\r\n\r\n") + slurp, err := io.ReadAll(conn) + if err != nil { + t.Fatal(err) + } + const wantPrefix = "HTTP/1.0 400 Bad Request\r\n" + if !strings.HasPrefix(string(slurp), wantPrefix) { + t.Errorf("response = %q; wanted prefix %q", slurp, wantPrefix) + } +} + +// Issue 15908 +func TestAutomaticHTTP2_Serve_NoTLSConfig(t *testing.T) { + testAutomaticHTTP2_Serve(t, nil, true) +} + +func TestAutomaticHTTP2_Serve_NonH2TLSConfig(t *testing.T) { + testAutomaticHTTP2_Serve(t, &tls.Config{}, false) +} + +func TestAutomaticHTTP2_Serve_H2TLSConfig(t *testing.T) { + testAutomaticHTTP2_Serve(t, &tls.Config{NextProtos: []string{"h2"}}, true) +} + +func testAutomaticHTTP2_Serve(t *testing.T, tlsConf *tls.Config, wantH2 bool) { + setParallel(t) + defer afterTest(t) + ln := newLocalListener(t) + ln.Close() // immediately (not a defer!) + var s Server + s.TLSConfig = tlsConf + if err := s.Serve(ln); err == nil { + t.Fatal("expected an error") + } + gotH2 := s.TLSNextProto["h2"] != nil + if gotH2 != wantH2 { + t.Errorf("http2 configured = %v; want %v", gotH2, wantH2) + } +} + +func TestAutomaticHTTP2_Serve_WithTLSConfig(t *testing.T) { + setParallel(t) + defer afterTest(t) + ln := newLocalListener(t) + ln.Close() // immediately (not a defer!) + var s Server + // Set the TLSConfig. In reality, this would be the + // *tls.Config given to tls.NewListener. + s.TLSConfig = &tls.Config{ + NextProtos: []string{"h2"}, + } + if err := s.Serve(ln); err == nil { + t.Fatal("expected an error") + } + on := s.TLSNextProto["h2"] != nil + if !on { + t.Errorf("http2 wasn't automatically enabled") + } +} + +func TestAutomaticHTTP2_ListenAndServe(t *testing.T) { + cert, err := tls.X509KeyPair(testcert.LocalhostCert, testcert.LocalhostKey) + if err != nil { + t.Fatal(err) + } + testAutomaticHTTP2_ListenAndServe(t, &tls.Config{ + Certificates: []tls.Certificate{cert}, + }) +} + +func TestAutomaticHTTP2_ListenAndServe_GetCertificate(t *testing.T) { + cert, err := tls.X509KeyPair(testcert.LocalhostCert, testcert.LocalhostKey) + if err != nil { + t.Fatal(err) + } + testAutomaticHTTP2_ListenAndServe(t, &tls.Config{ + GetCertificate: func(clientHello *tls.ClientHelloInfo) (*tls.Certificate, error) { + return &cert, nil + }, + }) +} + +func testAutomaticHTTP2_ListenAndServe(t *testing.T, tlsConf *tls.Config) { + CondSkipHTTP2(t) + // Not parallel: uses global test hooks. + defer afterTest(t) + defer SetTestHookServerServe(nil) + var ok bool + var s *Server + const maxTries = 5 + var ln net.Listener +Try: + for try := 0; try < maxTries; try++ { + ln = newLocalListener(t) + addr := ln.Addr().String() + ln.Close() + t.Logf("Got %v", addr) + lnc := make(chan net.Listener, 1) + SetTestHookServerServe(func(s *Server, ln net.Listener) { + lnc <- ln + }) + s = &Server{ + Addr: addr, + TLSConfig: tlsConf, + } + errc := make(chan error, 1) + go func() { errc <- s.ListenAndServeTLS("", "") }() + select { + case err := <-errc: + t.Logf("On try #%v: %v", try+1, err) + continue + case ln = <-lnc: + ok = true + t.Logf("Listening on %v", ln.Addr().String()) + break Try + } + } + if !ok { + t.Fatalf("Failed to start up after %d tries", maxTries) + } + defer ln.Close() + c, err := tls.Dial("tcp", ln.Addr().String(), &tls.Config{ + InsecureSkipVerify: true, + NextProtos: []string{"h2", "http/1.1"}, + }) + if err != nil { + t.Fatal(err) + } + defer c.Close() + if got, want := c.ConnectionState().NegotiatedProtocol, "h2"; got != want { + t.Errorf("NegotiatedProtocol = %q; want %q", got, want) + } + if got, want := c.ConnectionState().NegotiatedProtocolIsMutual, true; got != want { + t.Errorf("NegotiatedProtocolIsMutual = %v; want %v", got, want) + } +} + +type serverExpectTest struct { + contentLength int // of request body + chunked bool + expectation string // e.g. "100-continue" + readBody bool // whether handler should read the body (if false, sends StatusUnauthorized) + expectedResponse string // expected substring in first line of http response +} + +func expectTest(contentLength int, expectation string, readBody bool, expectedResponse string) serverExpectTest { + return serverExpectTest{ + contentLength: contentLength, + expectation: expectation, + readBody: readBody, + expectedResponse: expectedResponse, + } +} + +var serverExpectTests = []serverExpectTest{ + // Normal 100-continues, case-insensitive. + expectTest(100, "100-continue", true, "100 Continue"), + expectTest(100, "100-cOntInUE", true, "100 Continue"), + + // No 100-continue. + expectTest(100, "", true, "200 OK"), + + // 100-continue but requesting client to deny us, + // so it never reads the body. + expectTest(100, "100-continue", false, "401 Unauthorized"), + // Likewise without 100-continue: + expectTest(100, "", false, "401 Unauthorized"), + + // Non-standard expectations are failures + expectTest(0, "a-pony", false, "417 Expectation Failed"), + + // Expect-100 requested but no body (is apparently okay: Issue 7625) + expectTest(0, "100-continue", true, "200 OK"), + // Expect-100 requested but handler doesn't read the body + expectTest(0, "100-continue", false, "401 Unauthorized"), + // Expect-100 continue with no body, but a chunked body. + { + expectation: "100-continue", + readBody: true, + chunked: true, + expectedResponse: "100 Continue", + }, +} + +// Tests that the server responds to the "Expect" request header +// correctly. +func TestServerExpect(t *testing.T) { run(t, testServerExpect, []testMode{http1Mode}) } +func testServerExpect(t *testing.T, mode testMode) { + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *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") { + io.ReadAll(r.Body) + w.Write([]byte("Hi")) + } else { + w.WriteHeader(StatusUnauthorized) + } + })).ts + + runTest := func(test serverExpectTest) { + conn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatalf("Dial: %v", err) + } + defer conn.Close() + + // Only send the body immediately if we're acting like an HTTP client + // that doesn't send 100-continue expectations. + writeBody := test.contentLength != 0 && strings.ToLower(test.expectation) != "100-continue" + + wg := sync.WaitGroup{} + wg.Add(1) + defer wg.Wait() + + go func() { + defer wg.Done() + + contentLen := fmt.Sprintf("Content-Length: %d", test.contentLength) + if test.chunked { + contentLen = "Transfer-Encoding: chunked" + } + _, err := fmt.Fprintf(conn, "POST /?readbody=%v HTTP/1.1\r\n"+ + "Connection: close\r\n"+ + "%s\r\n"+ + "Expect: %s\r\nHost: foo\r\n\r\n", + test.readBody, contentLen, test.expectation) + if err != nil { + t.Errorf("On test %#v, error writing request headers: %v", test, err) + return + } + if writeBody { + var targ io.WriteCloser = struct { + io.Writer + io.Closer + }{ + conn, + io.NopCloser(nil), + } + if test.chunked { + targ = httputil.NewChunkedWriter(conn) + } + body := strings.Repeat("A", test.contentLength) + _, err = fmt.Fprint(targ, body) + if err == nil { + err = targ.Close() + } + if err != nil { + if !test.readBody { + // Server likely already hung up on us. + // See larger comment below. + t.Logf("On test %#v, acceptable error writing request body: %v", test, err) + return + } + t.Errorf("On test %#v, error writing request body: %v", test, err) + } + } + }() + bufr := bufio.NewReader(conn) + line, err := bufr.ReadString('\n') + if err != nil { + if writeBody && !test.readBody { + // This is an acceptable failure due to a possible TCP race: + // We were still writing data and the server hung up on us. A TCP + // implementation may send a RST if our request body data was known + // to be lost, which may trigger our reads to fail. + // See RFC 1122 page 88. + t.Logf("On test %#v, acceptable error from ReadString: %v", test, err) + return + } + t.Fatalf("On test %#v, ReadString: %v", test, err) + } + if !strings.Contains(line, test.expectedResponse) { + t.Errorf("On test %#v, got first line = %q; want %q", test, line, test.expectedResponse) + } + } + + for _, test := range serverExpectTests { + runTest(test) + } +} + +// Under a ~256KB (maxPostHandlerReadBytes) threshold, the server +// should consume client request bodies that a handler didn't read. +func TestServerUnreadRequestBodyLittle(t *testing.T) { + setParallel(t) + defer afterTest(t) + conn := new(testConn) + body := strings.Repeat("x", 100<<10) + conn.readBuf.Write([]byte(fmt.Sprintf( + "POST / HTTP/1.1\r\n"+ + "Host: test\r\n"+ + "Content-Length: %d\r\n"+ + "\r\n", len(body)))) + conn.readBuf.Write([]byte(body)) + + done := make(chan bool) + + readBufLen := func() int { + conn.readMu.Lock() + defer conn.readMu.Unlock() + return conn.readBuf.Len() + } + + ls := &oneConnListener{conn} + go Serve(ls, HandlerFunc(func(rw ResponseWriter, req *Request) { + defer close(done) + if bufLen := readBufLen(); bufLen < len(body)/2 { + t.Errorf("on request, read buffer length is %d; expected about 100 KB", bufLen) + } + rw.WriteHeader(200) + rw.(Flusher).Flush() + if g, e := readBufLen(), 0; g != e { + t.Errorf("after WriteHeader, read buffer length is %d; want %d", g, e) + } + if c := rw.Header().Get("Connection"); c != "" { + t.Errorf(`Connection header = %q; want ""`, c) + } + })) + <-done +} + +// Over a ~256KB (maxPostHandlerReadBytes) threshold, the server +// should ignore client request bodies that a handler didn't read +// and close the connection. +func TestServerUnreadRequestBodyLarge(t *testing.T) { + setParallel(t) + if testing.Short() && testenv.Builder() == "" { + t.Log("skipping in short mode") + } + conn := new(testConn) + body := strings.Repeat("x", 1<<20) + conn.readBuf.Write([]byte(fmt.Sprintf( + "POST / HTTP/1.1\r\n"+ + "Host: test\r\n"+ + "Content-Length: %d\r\n"+ + "\r\n", len(body)))) + conn.readBuf.Write([]byte(body)) + conn.closec = make(chan bool, 1) + + ls := &oneConnListener{conn} + go Serve(ls, HandlerFunc(func(rw ResponseWriter, req *Request) { + if conn.readBuf.Len() < len(body)/2 { + t.Errorf("on request, read buffer length is %d; expected about 1MB", conn.readBuf.Len()) + } + rw.WriteHeader(200) + rw.(Flusher).Flush() + if conn.readBuf.Len() < len(body)/2 { + t.Errorf("post-WriteHeader, read buffer length is %d; expected about 1MB", conn.readBuf.Len()) + } + })) + <-conn.closec + + if res := conn.writeBuf.String(); !strings.Contains(res, "Connection: close") { + t.Errorf("Expected a Connection: close header; got response: %s", res) + } +} + +type handlerBodyCloseTest struct { + bodySize int + bodyChunked bool + reqConnClose bool + + wantEOFSearch bool // should Handler's Body.Close do Reads, looking for EOF? + wantNextReq bool // should it find the next request on the same conn? +} + +func (t handlerBodyCloseTest) connectionHeader() string { + if t.reqConnClose { + return "Connection: close\r\n" + } + return "" +} + +var handlerBodyCloseTests = [...]handlerBodyCloseTest{ + // Small enough to slurp past to the next request + + // has Content-Length. + 0: { + bodySize: 20 << 10, + bodyChunked: false, + reqConnClose: false, + wantEOFSearch: true, + wantNextReq: true, + }, + + // Small enough to slurp past to the next request + + // is chunked. + 1: { + bodySize: 20 << 10, + bodyChunked: true, + reqConnClose: false, + wantEOFSearch: true, + wantNextReq: true, + }, + + // Small enough to slurp past to the next request + + // has Content-Length + + // declares Connection: close (so pointless to read more). + 2: { + bodySize: 20 << 10, + bodyChunked: false, + reqConnClose: true, + wantEOFSearch: false, + wantNextReq: false, + }, + + // Small enough to slurp past to the next request + + // declares Connection: close, + // but chunked, so it might have trailers. + // TODO: maybe skip this search if no trailers were declared + // in the headers. + 3: { + bodySize: 20 << 10, + bodyChunked: true, + reqConnClose: true, + wantEOFSearch: true, + wantNextReq: false, + }, + + // Big with Content-Length, so give up immediately if we know it's too big. + 4: { + bodySize: 1 << 20, + bodyChunked: false, // has a Content-Length + reqConnClose: false, + wantEOFSearch: false, + wantNextReq: false, + }, + + // Big chunked, so read a bit before giving up. + 5: { + bodySize: 1 << 20, + bodyChunked: true, + reqConnClose: false, + wantEOFSearch: true, + wantNextReq: false, + }, + + // Big with Connection: close, but chunked, so search for trailers. + // TODO: maybe skip this search if no trailers were declared + // in the headers. + 6: { + bodySize: 1 << 20, + bodyChunked: true, + reqConnClose: true, + wantEOFSearch: true, + wantNextReq: false, + }, + + // Big with Connection: close, so don't do any reads on Close. + // With Content-Length. + 7: { + bodySize: 1 << 20, + bodyChunked: false, + reqConnClose: true, + wantEOFSearch: false, + wantNextReq: false, + }, +} + +func TestHandlerBodyClose(t *testing.T) { + setParallel(t) + if testing.Short() && testenv.Builder() == "" { + t.Skip("skipping in -short mode") + } + for i, tt := range handlerBodyCloseTests { + testHandlerBodyClose(t, i, tt) + } +} + +func testHandlerBodyClose(t *testing.T, i int, tt handlerBodyCloseTest) { + conn := new(testConn) + body := strings.Repeat("x", tt.bodySize) + if tt.bodyChunked { + conn.readBuf.WriteString("POST / HTTP/1.1\r\n" + + "Host: test\r\n" + + tt.connectionHeader() + + "Transfer-Encoding: chunked\r\n" + + "\r\n") + cw := internal.NewChunkedWriter(&conn.readBuf) + io.WriteString(cw, body) + cw.Close() + conn.readBuf.WriteString("\r\n") + } else { + conn.readBuf.Write([]byte(fmt.Sprintf( + "POST / HTTP/1.1\r\n"+ + "Host: test\r\n"+ + tt.connectionHeader()+ + "Content-Length: %d\r\n"+ + "\r\n", len(body)))) + conn.readBuf.Write([]byte(body)) + } + if !tt.reqConnClose { + conn.readBuf.WriteString("GET / HTTP/1.1\r\nHost: test\r\n\r\n") + } + conn.closec = make(chan bool, 1) + + readBufLen := func() int { + conn.readMu.Lock() + defer conn.readMu.Unlock() + return conn.readBuf.Len() + } + + ls := &oneConnListener{conn} + var numReqs int + var size0, size1 int + go Serve(ls, HandlerFunc(func(rw ResponseWriter, req *Request) { + numReqs++ + if numReqs == 1 { + size0 = readBufLen() + req.Body.Close() + size1 = readBufLen() + } + })) + <-conn.closec + if numReqs < 1 || numReqs > 2 { + t.Fatalf("%d. bug in test. unexpected number of requests = %d", i, numReqs) + } + didSearch := size0 != size1 + if didSearch != tt.wantEOFSearch { + t.Errorf("%d. did EOF search = %v; want %v (size went from %d to %d)", i, didSearch, !didSearch, size0, size1) + } + if tt.wantNextReq && numReqs != 2 { + t.Errorf("%d. numReq = %d; want 2", i, numReqs) + } +} + +// testHandlerBodyConsumer represents a function injected into a test handler to +// vary work done on a request Body. +type testHandlerBodyConsumer struct { + name string + f func(io.ReadCloser) +} + +var testHandlerBodyConsumers = []testHandlerBodyConsumer{ + {"nil", func(io.ReadCloser) {}}, + {"close", func(r io.ReadCloser) { r.Close() }}, + {"discard", func(r io.ReadCloser) { io.Copy(io.Discard, r) }}, +} + +func TestRequestBodyReadErrorClosesConnection(t *testing.T) { + setParallel(t) + defer afterTest(t) + for _, handler := range testHandlerBodyConsumers { + conn := new(testConn) + conn.readBuf.WriteString("POST /public HTTP/1.1\r\n" + + "Host: test\r\n" + + "Transfer-Encoding: chunked\r\n" + + "\r\n" + + "hax\r\n" + // Invalid chunked encoding + "GET /secret HTTP/1.1\r\n" + + "Host: test\r\n" + + "\r\n") + + conn.closec = make(chan bool, 1) + ls := &oneConnListener{conn} + var numReqs int + go Serve(ls, HandlerFunc(func(_ ResponseWriter, req *Request) { + numReqs++ + if strings.Contains(req.URL.Path, "secret") { + t.Error("Request for /secret encountered, should not have happened.") + } + handler.f(req.Body) + })) + <-conn.closec + if numReqs != 1 { + t.Errorf("Handler %v: got %d reqs; want 1", handler.name, numReqs) + } + } +} + +func TestInvalidTrailerClosesConnection(t *testing.T) { + setParallel(t) + defer afterTest(t) + for _, handler := range testHandlerBodyConsumers { + conn := new(testConn) + conn.readBuf.WriteString("POST /public HTTP/1.1\r\n" + + "Host: test\r\n" + + "Trailer: hack\r\n" + + "Transfer-Encoding: chunked\r\n" + + "\r\n" + + "3\r\n" + + "hax\r\n" + + "0\r\n" + + "I'm not a valid trailer\r\n" + + "GET /secret HTTP/1.1\r\n" + + "Host: test\r\n" + + "\r\n") + + conn.closec = make(chan bool, 1) + ln := &oneConnListener{conn} + var numReqs int + go Serve(ln, HandlerFunc(func(_ ResponseWriter, req *Request) { + numReqs++ + if strings.Contains(req.URL.Path, "secret") { + t.Errorf("Handler %s, Request for /secret encountered, should not have happened.", handler.name) + } + handler.f(req.Body) + })) + <-conn.closec + if numReqs != 1 { + t.Errorf("Handler %s: got %d reqs; want 1", handler.name, numReqs) + } + } +} + +// slowTestConn is a net.Conn that provides a means to simulate parts of a +// request being received piecemeal. Deadlines can be set and enforced in both +// Read and Write. +type slowTestConn struct { + // over multiple calls to Read, time.Durations are slept, strings are read. + script []any + closec chan bool + + mu sync.Mutex // guards rd/wd + rd, wd time.Time // read, write deadline + noopConn +} + +func (c *slowTestConn) SetDeadline(t time.Time) error { + c.SetReadDeadline(t) + c.SetWriteDeadline(t) + return nil +} + +func (c *slowTestConn) SetReadDeadline(t time.Time) error { + c.mu.Lock() + defer c.mu.Unlock() + c.rd = t + return nil +} + +func (c *slowTestConn) SetWriteDeadline(t time.Time) error { + c.mu.Lock() + defer c.mu.Unlock() + c.wd = t + return nil +} + +func (c *slowTestConn) Read(b []byte) (n int, err error) { + c.mu.Lock() + defer c.mu.Unlock() +restart: + if !c.rd.IsZero() && time.Now().After(c.rd) { + return 0, syscall.ETIMEDOUT + } + if len(c.script) == 0 { + return 0, io.EOF + } + + switch cue := c.script[0].(type) { + case time.Duration: + if !c.rd.IsZero() { + // If the deadline falls in the middle of our sleep window, deduct + // part of the sleep, then return a timeout. + if remaining := time.Until(c.rd); remaining < cue { + c.script[0] = cue - remaining + time.Sleep(remaining) + return 0, syscall.ETIMEDOUT + } + } + c.script = c.script[1:] + time.Sleep(cue) + goto restart + + case string: + n = copy(b, cue) + // If cue is too big for the buffer, leave the end for the next Read. + if len(cue) > n { + c.script[0] = cue[n:] + } else { + c.script = c.script[1:] + } + + default: + panic("unknown cue in slowTestConn script") + } + + return +} + +func (c *slowTestConn) Close() error { + select { + case c.closec <- true: + default: + } + return nil +} + +func (c *slowTestConn) Write(b []byte) (int, error) { + if !c.wd.IsZero() && time.Now().After(c.wd) { + return 0, syscall.ETIMEDOUT + } + return len(b), nil +} + +func TestRequestBodyTimeoutClosesConnection(t *testing.T) { + if testing.Short() { + t.Skip("skipping in -short mode") + } + defer afterTest(t) + for _, handler := range testHandlerBodyConsumers { + conn := &slowTestConn{ + script: []any{ + "POST /public HTTP/1.1\r\n" + + "Host: test\r\n" + + "Content-Length: 10000\r\n" + + "\r\n", + "foo bar baz", + 600 * time.Millisecond, // Request deadline should hit here + "GET /secret HTTP/1.1\r\n" + + "Host: test\r\n" + + "\r\n", + }, + closec: make(chan bool, 1), + } + ls := &oneConnListener{conn} + + var numReqs int + s := Server{ + Handler: HandlerFunc(func(_ ResponseWriter, req *Request) { + numReqs++ + if strings.Contains(req.URL.Path, "secret") { + t.Error("Request for /secret encountered, should not have happened.") + } + handler.f(req.Body) + }), + ReadTimeout: 400 * time.Millisecond, + } + go s.Serve(ls) + <-conn.closec + + if numReqs != 1 { + t.Errorf("Handler %v: got %d reqs; want 1", handler.name, numReqs) + } + } +} + +// cancelableTimeoutContext overwrites the error message to DeadlineExceeded +type cancelableTimeoutContext struct { + context.Context +} + +func (c cancelableTimeoutContext) Err() error { + if c.Context.Err() != nil { + return context.DeadlineExceeded + } + return nil +} + +func TestTimeoutHandler(t *testing.T) { run(t, testTimeoutHandler) } +func testTimeoutHandler(t *testing.T, mode testMode) { + sendHi := make(chan bool, 1) + writeErrors := make(chan error, 1) + sayHi := HandlerFunc(func(w ResponseWriter, r *Request) { + <-sendHi + _, werr := w.Write([]byte("hi")) + writeErrors <- werr + }) + ctx, cancel := context.WithCancel(context.Background()) + h := NewTestTimeoutHandler(sayHi, cancelableTimeoutContext{ctx}) + cst := newClientServerTest(t, mode, h) + + // Succeed without timing out: + sendHi <- true + res, err := cst.c.Get(cst.ts.URL) + if err != nil { + t.Error(err) + } + if g, e := res.StatusCode, StatusOK; g != e { + t.Errorf("got res.StatusCode %d; expected %d", g, e) + } + body, _ := io.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: + cancel() + + res, err = cst.c.Get(cst.ts.URL) + if err != nil { + t.Error(err) + } + if g, e := res.StatusCode, StatusServiceUnavailable; g != e { + t.Errorf("got res.StatusCode %d; expected %d", g, e) + } + body, _ = io.ReadAll(res.Body) + if !strings.Contains(string(body), "<title>Timeout</title>") { + t.Errorf("expected timeout body; got %q", string(body)) + } + if g, w := res.Header.Get("Content-Type"), "text/html; charset=utf-8"; g != w { + t.Errorf("response content-type = %q; want %q", g, w) + } + + // Now make the previously-timed out handler speak again, + // which verifies the panic is handled: + sendHi <- true + if g, e := <-writeErrors, ErrHandlerTimeout; g != e { + t.Errorf("expected Write error of %v; got %v", e, g) + } +} + +// See issues 8209 and 8414. +func TestTimeoutHandlerRace(t *testing.T) { run(t, testTimeoutHandlerRace) } +func testTimeoutHandlerRace(t *testing.T, mode testMode) { + delayHi := HandlerFunc(func(w ResponseWriter, r *Request) { + ms, _ := strconv.Atoi(r.URL.Path[1:]) + if ms == 0 { + ms = 1 + } + for i := 0; i < ms; i++ { + w.Write([]byte("hi")) + time.Sleep(time.Millisecond) + } + }) + + ts := newClientServerTest(t, mode, TimeoutHandler(delayHi, 20*time.Millisecond, "")).ts + + c := ts.Client() + + var wg sync.WaitGroup + gate := make(chan bool, 10) + n := 50 + if testing.Short() { + n = 10 + gate = make(chan bool, 3) + } + for i := 0; i < n; i++ { + gate <- true + wg.Add(1) + go func() { + defer wg.Done() + defer func() { <-gate }() + res, err := c.Get(fmt.Sprintf("%s/%d", ts.URL, rand.Intn(50))) + if err == nil { + io.Copy(io.Discard, res.Body) + res.Body.Close() + } + }() + } + wg.Wait() +} + +// See issues 8209 and 8414. +// Both issues involved panics in the implementation of TimeoutHandler. +func TestTimeoutHandlerRaceHeader(t *testing.T) { run(t, testTimeoutHandlerRaceHeader) } +func testTimeoutHandlerRaceHeader(t *testing.T, mode testMode) { + delay204 := HandlerFunc(func(w ResponseWriter, r *Request) { + w.WriteHeader(204) + }) + + ts := newClientServerTest(t, mode, TimeoutHandler(delay204, time.Nanosecond, "")).ts + + var wg sync.WaitGroup + gate := make(chan bool, 50) + n := 500 + if testing.Short() { + n = 10 + } + + c := ts.Client() + for i := 0; i < n; i++ { + gate <- true + wg.Add(1) + go func() { + defer wg.Done() + defer func() { <-gate }() + res, err := c.Get(ts.URL) + if err != nil { + // We see ECONNRESET from the connection occasionally, + // and that's OK: this test is checking that the server does not panic. + t.Log(err) + return + } + defer res.Body.Close() + io.Copy(io.Discard, res.Body) + }() + } + wg.Wait() +} + +// Issue 9162 +func TestTimeoutHandlerRaceHeaderTimeout(t *testing.T) { run(t, testTimeoutHandlerRaceHeaderTimeout) } +func testTimeoutHandlerRaceHeaderTimeout(t *testing.T, mode testMode) { + sendHi := make(chan bool, 1) + writeErrors := make(chan error, 1) + sayHi := HandlerFunc(func(w ResponseWriter, r *Request) { + w.Header().Set("Content-Type", "text/plain") + <-sendHi + _, werr := w.Write([]byte("hi")) + writeErrors <- werr + }) + ctx, cancel := context.WithCancel(context.Background()) + h := NewTestTimeoutHandler(sayHi, cancelableTimeoutContext{ctx}) + cst := newClientServerTest(t, mode, h) + + // Succeed without timing out: + sendHi <- true + res, err := cst.c.Get(cst.ts.URL) + if err != nil { + t.Error(err) + } + if g, e := res.StatusCode, StatusOK; g != e { + t.Errorf("got res.StatusCode %d; expected %d", g, e) + } + body, _ := io.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: + cancel() + + res, err = cst.c.Get(cst.ts.URL) + if err != nil { + t.Error(err) + } + if g, e := res.StatusCode, StatusServiceUnavailable; g != e { + t.Errorf("got res.StatusCode %d; expected %d", g, e) + } + body, _ = io.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, ErrHandlerTimeout; g != e { + t.Errorf("expected Write error of %v; got %v", e, g) + } +} + +// Issue 14568. +func TestTimeoutHandlerStartTimerWhenServing(t *testing.T) { + run(t, testTimeoutHandlerStartTimerWhenServing) +} +func testTimeoutHandlerStartTimerWhenServing(t *testing.T, mode testMode) { + if testing.Short() { + t.Skip("skipping sleeping test in -short mode") + } + var handler HandlerFunc = func(w ResponseWriter, _ *Request) { + w.WriteHeader(StatusNoContent) + } + timeout := 300 * time.Millisecond + ts := newClientServerTest(t, mode, TimeoutHandler(handler, timeout, "")).ts + defer ts.Close() + + c := ts.Client() + + // Issue was caused by the timeout handler starting the timer when + // was created, not when the request. So wait for more than the timeout + // to ensure that's not the case. + time.Sleep(2 * timeout) + res, err := c.Get(ts.URL) + if err != nil { + t.Fatal(err) + } + defer res.Body.Close() + if res.StatusCode != StatusNoContent { + t.Errorf("got res.StatusCode %d, want %v", res.StatusCode, StatusNoContent) + } +} + +func TestTimeoutHandlerContextCanceled(t *testing.T) { run(t, testTimeoutHandlerContextCanceled) } +func testTimeoutHandlerContextCanceled(t *testing.T, mode testMode) { + writeErrors := make(chan error, 1) + sayHi := HandlerFunc(func(w ResponseWriter, r *Request) { + w.Header().Set("Content-Type", "text/plain") + var err error + // The request context has already been canceled, but + // retry the write for a while to give the timeout handler + // a chance to notice. + for i := 0; i < 100; i++ { + _, err = w.Write([]byte("a")) + if err != nil { + break + } + time.Sleep(1 * time.Millisecond) + } + writeErrors <- err + }) + ctx, cancel := context.WithCancel(context.Background()) + cancel() + h := NewTestTimeoutHandler(sayHi, ctx) + cst := newClientServerTest(t, mode, h) + defer cst.close() + + res, err := cst.c.Get(cst.ts.URL) + if err != nil { + t.Error(err) + } + if g, e := res.StatusCode, StatusServiceUnavailable; g != e { + t.Errorf("got res.StatusCode %d; expected %d", g, e) + } + body, _ := io.ReadAll(res.Body) + if g, e := string(body), ""; g != e { + t.Errorf("got body %q; expected %q", g, e) + } + if g, e := <-writeErrors, context.Canceled; g != e { + t.Errorf("got unexpected Write in handler: %v, want %g", g, e) + } +} + +// https://golang.org/issue/15948 +func TestTimeoutHandlerEmptyResponse(t *testing.T) { run(t, testTimeoutHandlerEmptyResponse) } +func testTimeoutHandlerEmptyResponse(t *testing.T, mode testMode) { + var handler HandlerFunc = func(w ResponseWriter, _ *Request) { + // No response. + } + timeout := 300 * time.Millisecond + ts := newClientServerTest(t, mode, TimeoutHandler(handler, timeout, "")).ts + + c := ts.Client() + + res, err := c.Get(ts.URL) + if err != nil { + t.Fatal(err) + } + defer res.Body.Close() + if res.StatusCode != StatusOK { + t.Errorf("got res.StatusCode %d, want %v", res.StatusCode, StatusOK) + } +} + +// https://golang.org/issues/22084 +func TestTimeoutHandlerPanicRecovery(t *testing.T) { + wrapper := func(h Handler) Handler { + return TimeoutHandler(h, time.Second, "") + } + run(t, func(t *testing.T, mode testMode) { + testHandlerPanic(t, false, mode, wrapper, "intentional death for testing") + }, testNotParallel) +} + +func TestRedirectBadPath(t *testing.T) { + // This used to crash. It's not valid input (bad path), but it + // shouldn't crash. + rr := httptest.NewRecorder() + req := &Request{ + Method: "GET", + URL: &url.URL{ + Scheme: "http", + Path: "not-empty-but-no-leading-slash", // bogus + }, + } + Redirect(rr, req, "", 304) + if rr.Code != 304 { + t.Errorf("Code = %d; want 304", rr.Code) + } +} + +// Test different URL formats and schemes +func TestRedirect(t *testing.T) { + req, _ := NewRequest("GET", "http://example.com/qux/", nil) + + var tests = []struct { + in string + want string + }{ + // normal http + {"http://foobar.com/baz", "http://foobar.com/baz"}, + // normal https + {"https://foobar.com/baz", "https://foobar.com/baz"}, + // custom scheme + {"test://foobar.com/baz", "test://foobar.com/baz"}, + // schemeless + {"//foobar.com/baz", "//foobar.com/baz"}, + // relative to the root + {"/foobar.com/baz", "/foobar.com/baz"}, + // relative to the current path + {"foobar.com/baz", "/qux/foobar.com/baz"}, + // relative to the current path (+ going upwards) + {"../quux/foobar.com/baz", "/quux/foobar.com/baz"}, + // incorrect number of slashes + {"///foobar.com/baz", "/foobar.com/baz"}, + + // Verifies we don't path.Clean() on the wrong parts in redirects: + {"/foo?next=http://bar.com/", "/foo?next=http://bar.com/"}, + {"http://localhost:8080/_ah/login?continue=http://localhost:8080/", + "http://localhost:8080/_ah/login?continue=http://localhost:8080/"}, + + {"/фубар", "/%d1%84%d1%83%d0%b1%d0%b0%d1%80"}, + {"http://foo.com/фубар", "http://foo.com/%d1%84%d1%83%d0%b1%d0%b0%d1%80"}, + } + + for _, tt := range tests { + rec := httptest.NewRecorder() + Redirect(rec, req, tt.in, 302) + if got, want := rec.Code, 302; got != want { + t.Errorf("Redirect(%q) generated status code %v; want %v", tt.in, got, want) + } + if got := rec.Header().Get("Location"); got != tt.want { + t.Errorf("Redirect(%q) generated Location header %q; want %q", tt.in, got, tt.want) + } + } +} + +// Test that Redirect sets Content-Type header for GET and HEAD requests +// and writes a short HTML body, unless the request already has a Content-Type header. +func TestRedirectContentTypeAndBody(t *testing.T) { + type ctHeader struct { + Values []string + } + + var tests = []struct { + method string + ct *ctHeader // Optional Content-Type header to set. + wantCT string + wantBody string + }{ + {MethodGet, nil, "text/html; charset=utf-8", "<a href=\"/foo\">Found</a>.\n\n"}, + {MethodHead, nil, "text/html; charset=utf-8", ""}, + {MethodPost, nil, "", ""}, + {MethodDelete, nil, "", ""}, + {"foo", nil, "", ""}, + {MethodGet, &ctHeader{[]string{"application/test"}}, "application/test", ""}, + {MethodGet, &ctHeader{[]string{}}, "", ""}, + {MethodGet, &ctHeader{nil}, "", ""}, + } + for _, tt := range tests { + req := httptest.NewRequest(tt.method, "http://example.com/qux/", nil) + rec := httptest.NewRecorder() + if tt.ct != nil { + rec.Header()["Content-Type"] = tt.ct.Values + } + Redirect(rec, req, "/foo", 302) + if got, want := rec.Code, 302; got != want { + t.Errorf("Redirect(%q, %#v) generated status code %v; want %v", tt.method, tt.ct, got, want) + } + if got, want := rec.Header().Get("Content-Type"), tt.wantCT; got != want { + t.Errorf("Redirect(%q, %#v) generated Content-Type header %q; want %q", tt.method, tt.ct, got, want) + } + resp := rec.Result() + body, err := io.ReadAll(resp.Body) + if err != nil { + t.Fatal(err) + } + if got, want := string(body), tt.wantBody; got != want { + t.Errorf("Redirect(%q, %#v) generated Body %q; want %q", tt.method, tt.ct, got, want) + } + } +} + +// 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) { run(t, testZeroLengthPostAndResponse) } + +func testZeroLengthPostAndResponse(t *testing.T, mode testMode) { + cst := newClientServerTest(t, mode, HandlerFunc(func(rw ResponseWriter, r *Request) { + all, err := io.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") + })) + + req, err := NewRequest("POST", cst.ts.URL, strings.NewReader("")) + if err != nil { + t.Fatal(err) + } + req.ContentLength = 0 + + var resp [5]*Response + for i := range resp { + resp[i], err = cst.c.Do(req) + if err != nil { + t.Fatalf("client post #%d: %v", i, err) + } + } + + for i := range resp { + all, err := io.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)) + } + } +} + +func TestHandlerPanicNil(t *testing.T) { + run(t, func(t *testing.T, mode testMode) { + testHandlerPanic(t, false, mode, nil, nil) + }, testNotParallel) +} + +func TestHandlerPanic(t *testing.T) { + run(t, func(t *testing.T, mode testMode) { + testHandlerPanic(t, false, mode, nil, "intentional death for testing") + }, testNotParallel) +} + +func TestHandlerPanicWithHijack(t *testing.T) { + // Only testing HTTP/1, and our http2 server doesn't support hijacking. + run(t, func(t *testing.T, mode testMode) { + testHandlerPanic(t, true, mode, nil, "intentional death for testing") + }, []testMode{http1Mode}) +} + +func testHandlerPanic(t *testing.T, withHijack bool, mode testMode, wrapper func(Handler) Handler, panicValue any) { + // Direct log output to a pipe. + // + // We read from the pipe to verify that the handler actually caught the panic + // and logged something. + // + // We use a pipe rather than a buffer, because when testing connection hijacking + // server shutdown doesn't wait for the hijacking handler to return, so the + // log may occur after the server has shut down. + pr, pw := io.Pipe() + defer pw.Close() + + var handler Handler = HandlerFunc(func(w ResponseWriter, r *Request) { + if withHijack { + rwc, _, err := w.(Hijacker).Hijack() + if err != nil { + t.Logf("unexpected error: %v", err) + } + defer rwc.Close() + } + panic(panicValue) + }) + if wrapper != nil { + handler = wrapper(handler) + } + cst := newClientServerTest(t, mode, handler, func(ts *httptest.Server) { + ts.Config.ErrorLog = log.New(pw, "", 0) + }) + + // Do a blocking read on the log output pipe. + done := make(chan bool, 1) + go func() { + buf := make([]byte, 4<<10) + _, err := pr.Read(buf) + pr.Close() + if err != nil && err != io.EOF { + t.Error(err) + } + done <- true + }() + + _, err := cst.c.Get(cst.ts.URL) + if err == nil { + t.Logf("expected an error") + } + + if panicValue == nil { + return + } + + <-done +} + +type terrorWriter struct{ t *testing.T } + +func (w terrorWriter) Write(p []byte) (int, error) { + w.t.Errorf("%s", p) + return len(p), nil +} + +// Issue 16456: allow writing 0 bytes on hijacked conn to test hijack +// without any log spam. +func TestServerWriteHijackZeroBytes(t *testing.T) { + run(t, testServerWriteHijackZeroBytes, []testMode{http1Mode}) +} +func testServerWriteHijackZeroBytes(t *testing.T, mode testMode) { + done := make(chan struct{}) + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + defer close(done) + w.(Flusher).Flush() + conn, _, err := w.(Hijacker).Hijack() + if err != nil { + t.Errorf("Hijack: %v", err) + return + } + defer conn.Close() + _, err = w.Write(nil) + if err != ErrHijacked { + t.Errorf("Write error = %v; want ErrHijacked", err) + } + }), func(ts *httptest.Server) { + ts.Config.ErrorLog = log.New(terrorWriter{t}, "Unexpected write: ", 0) + }).ts + + c := ts.Client() + res, err := c.Get(ts.URL) + if err != nil { + t.Fatal(err) + } + res.Body.Close() + <-done +} + +func TestServerNoDate(t *testing.T) { + run(t, func(t *testing.T, mode testMode) { + testServerNoHeader(t, mode, "Date") + }) +} + +func TestServerContentType(t *testing.T) { + run(t, func(t *testing.T, mode testMode) { + testServerNoHeader(t, mode, "Content-Type") + }) +} + +func testServerNoHeader(t *testing.T, mode testMode, header string) { + cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + w.Header()[header] = nil + io.WriteString(w, "<html>foo</html>") // non-empty + })) + res, err := cst.c.Get(cst.ts.URL) + if err != nil { + t.Fatal(err) + } + res.Body.Close() + if got, ok := res.Header[header]; ok { + t.Fatalf("Expected no %s header; got %q", header, got) + } +} + +func TestStripPrefix(t *testing.T) { run(t, testStripPrefix) } +func testStripPrefix(t *testing.T, mode testMode) { + h := HandlerFunc(func(w ResponseWriter, r *Request) { + w.Header().Set("X-Path", r.URL.Path) + w.Header().Set("X-RawPath", r.URL.RawPath) + }) + ts := newClientServerTest(t, mode, StripPrefix("/foo/bar", h)).ts + + c := ts.Client() + + cases := []struct { + reqPath string + path string // If empty we want a 404. + rawPath string + }{ + {"/foo/bar/qux", "/qux", ""}, + {"/foo/bar%2Fqux", "/qux", "%2Fqux"}, + {"/foo%2Fbar/qux", "", ""}, // Escaped prefix does not match. + {"/bar", "", ""}, // No prefix match. + } + for _, tc := range cases { + t.Run(tc.reqPath, func(t *testing.T) { + res, err := c.Get(ts.URL + tc.reqPath) + if err != nil { + t.Fatal(err) + } + res.Body.Close() + if tc.path == "" { + if res.StatusCode != StatusNotFound { + t.Errorf("got %q, want 404 Not Found", res.Status) + } + return + } + if res.StatusCode != StatusOK { + t.Fatalf("got %q, want 200 OK", res.Status) + } + if g, w := res.Header.Get("X-Path"), tc.path; g != w { + t.Errorf("got Path %q, want %q", g, w) + } + if g, w := res.Header.Get("X-RawPath"), tc.rawPath; g != w { + t.Errorf("got RawPath %q, want %q", g, w) + } + }) + } +} + +// https://golang.org/issue/18952. +func TestStripPrefixNotModifyRequest(t *testing.T) { + h := StripPrefix("/foo", NotFoundHandler()) + req := httptest.NewRequest("GET", "/foo/bar", nil) + h.ServeHTTP(httptest.NewRecorder(), req) + if req.URL.Path != "/foo/bar" { + t.Errorf("StripPrefix should not modify the provided Request, but it did") + } +} + +func TestRequestLimit(t *testing.T) { run(t, testRequestLimit) } +func testRequestLimit(t *testing.T, mode testMode) { + cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + t.Fatalf("didn't expect to get request in Handler") + }), optQuietLog) + req, _ := NewRequest("GET", cst.ts.URL, nil) + var bytesPerHeader = len("header12345: val12345\r\n") + for i := 0; i < ((DefaultMaxHeaderBytes+4096)/bytesPerHeader)+1; i++ { + req.Header.Set(fmt.Sprintf("header%05d", i), fmt.Sprintf("val%05d", i)) + } + res, err := cst.c.Do(req) + if res != nil { + defer res.Body.Close() + } + if mode == http2Mode { + // In HTTP/2, the result depends on a race. If the client has received the + // server's SETTINGS before RoundTrip starts sending the request, then RoundTrip + // will fail with an error. Otherwise, the client should receive a 431 from the + // server. + if err == nil && res.StatusCode != 431 { + t.Fatalf("expected 431 response status; got: %d %s", res.StatusCode, res.Status) + } + } else { + // In HTTP/1, we expect a 431 from the server. + // 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. + if err != nil { + t.Fatalf("Do: %v", err) + } + if res.StatusCode != 431 { + t.Fatalf("expected 431 response status; got: %d %s", res.StatusCode, res.Status) + } + } +} + +type neverEnding byte + +func (b neverEnding) Read(p []byte) (n int, err error) { + for i := range p { + p[i] = byte(b) + } + return len(p), nil +} + +type countReader struct { + r io.Reader + n *int64 +} + +func (cr countReader) Read(p []byte) (n int, err error) { + n, err = cr.r.Read(p) + atomic.AddInt64(cr.n, int64(n)) + return +} + +func TestRequestBodyLimit(t *testing.T) { run(t, testRequestBodyLimit) } +func testRequestBodyLimit(t *testing.T, mode testMode) { + const limit = 1 << 20 + cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + r.Body = MaxBytesReader(w, r.Body, limit) + n, err := io.Copy(io.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) + } + mbErr, ok := err.(*MaxBytesError) + if !ok { + t.Errorf("expected MaxBytesError, got %T", err) + } + if mbErr.Limit != limit { + t.Errorf("MaxBytesError.Limit = %d, want %d", mbErr.Limit, limit) + } + })) + + nWritten := new(int64) + req, _ := NewRequest("POST", cst.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. + resp, err := cst.c.Do(req) + if err == nil { + resp.Body.Close() + } + + if atomic.LoadInt64(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) { run(t, testClientWriteShutdown) } +func testClientWriteShutdown(t *testing.T, mode testMode) { + if runtime.GOOS == "plan9" { + t.Skip("skipping test; see https://golang.org/issue/17906") + } + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {})).ts + 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("CloseWrite: %v", err) + } + + bs, err := io.ReadAll(conn) + if err != nil { + t.Errorf("ReadAll: %v", err) + } + got := string(bs) + if got != "" { + t.Errorf("read %q from server; want nothing", got) + } +} + +// Tests that chunked server responses that write 1 byte at a time are +// buffered before chunk headers are added, not after chunk headers. +func TestServerBufferedChunking(t *testing.T) { + conn := new(testConn) + conn.readBuf.Write([]byte("GET / HTTP/1.1\r\nHost: foo\r\n\r\n")) + conn.closec = make(chan bool, 1) + ls := &oneConnListener{conn} + go Serve(ls, HandlerFunc(func(rw ResponseWriter, req *Request) { + rw.(Flusher).Flush() // force the Header to be sent, in chunking mode, not counting the length + rw.Write([]byte{'x'}) + rw.Write([]byte{'y'}) + rw.Write([]byte{'z'}) + })) + <-conn.closec + if !bytes.HasSuffix(conn.writeBuf.Bytes(), []byte("\r\n\r\n3\r\nxyz\r\n0\r\n\r\n")) { + t.Errorf("response didn't end with a single 3 byte 'xyz' chunk; got:\n%q", + conn.writeBuf.Bytes()) + } +} + +// Tests that the server flushes its response headers out when it's +// ignoring the response body and waits a bit before forcefully +// closing the TCP connection, causing the client to get a RST. +// See https://golang.org/issue/3595 +func TestServerGracefulClose(t *testing.T) { + run(t, testServerGracefulClose, []testMode{http1Mode}) +} +func testServerGracefulClose(t *testing.T, mode testMode) { + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + Error(w, "bye", StatusUnauthorized) + })).ts + + conn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatal(err) + } + defer conn.Close() + const bodySize = 5 << 20 + req := []byte(fmt.Sprintf("POST / HTTP/1.1\r\nHost: foo.com\r\nContent-Length: %d\r\n\r\n", bodySize)) + for i := 0; i < bodySize; i++ { + req = append(req, 'x') + } + writeErr := make(chan error) + go func() { + _, err := conn.Write(req) + writeErr <- err + }() + br := bufio.NewReader(conn) + lineNum := 0 + for { + line, err := br.ReadString('\n') + if err == io.EOF { + break + } + if err != nil { + t.Fatalf("ReadLine: %v", err) + } + lineNum++ + if lineNum == 1 && !strings.Contains(line, "401 Unauthorized") { + t.Errorf("Response line = %q; want a 401", line) + } + } + // Wait for write to finish. This is a broken pipe on both + // Darwin and Linux, but checking this isn't the point of + // the test. + <-writeErr +} + +func TestCaseSensitiveMethod(t *testing.T) { run(t, testCaseSensitiveMethod) } +func testCaseSensitiveMethod(t *testing.T, mode testMode) { + cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + if r.Method != "get" { + t.Errorf(`Got method %q; want "get"`, r.Method) + } + })) + defer cst.close() + req, _ := NewRequest("get", cst.ts.URL, nil) + res, err := cst.c.Do(req) + if err != nil { + t.Error(err) + return + } + + res.Body.Close() +} + +// 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) { + run(t, testContentLengthZero, []testMode{http1Mode}) +} +func testContentLengthZero(t *testing.T, mode testMode) { + ts := newClientServerTest(t, mode, HandlerFunc(func(rw ResponseWriter, req *Request) {})).ts + + 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, _ := NewRequest("GET", "/", nil) + res, err := 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 TestCloseNotifier(t *testing.T) { + run(t, testCloseNotifier, []testMode{http1Mode}) +} +func testCloseNotifier(t *testing.T, mode testMode) { + gotReq := make(chan bool, 1) + sawClose := make(chan bool, 1) + ts := newClientServerTest(t, mode, HandlerFunc(func(rw ResponseWriter, req *Request) { + gotReq <- true + cc := rw.(CloseNotifier).CloseNotify() + <-cc + sawClose <- true + })).ts + conn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatalf("error dialing: %v", err) + } + diec := make(chan bool) + go func() { + _, err = fmt.Fprintf(conn, "GET / HTTP/1.1\r\nConnection: keep-alive\r\nHost: foo\r\n\r\n") + if err != nil { + t.Error(err) + return + } + <-diec + conn.Close() + }() +For: + for { + select { + case <-gotReq: + diec <- true + case <-sawClose: + break For + } + } + ts.Close() +} + +// Tests that a pipelined request does not cause the first request's +// Handler's CloseNotify channel to fire. +// +// Issue 13165 (where it used to deadlock), but behavior changed in Issue 23921. +func TestCloseNotifierPipelined(t *testing.T) { + run(t, testCloseNotifierPipelined, []testMode{http1Mode}) +} +func testCloseNotifierPipelined(t *testing.T, mode testMode) { + gotReq := make(chan bool, 2) + sawClose := make(chan bool, 2) + ts := newClientServerTest(t, mode, HandlerFunc(func(rw ResponseWriter, req *Request) { + gotReq <- true + cc := rw.(CloseNotifier).CloseNotify() + select { + case <-cc: + t.Error("unexpected CloseNotify") + case <-time.After(100 * time.Millisecond): + } + sawClose <- true + })).ts + conn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatalf("error dialing: %v", err) + } + diec := make(chan bool, 1) + defer close(diec) + go func() { + const req = "GET / HTTP/1.1\r\nConnection: keep-alive\r\nHost: foo\r\n\r\n" + _, err = io.WriteString(conn, req+req) // two requests + if err != nil { + t.Error(err) + return + } + <-diec + conn.Close() + }() + reqs := 0 + closes := 0 + for { + select { + case <-gotReq: + reqs++ + if reqs > 2 { + t.Fatal("too many requests") + } + case <-sawClose: + closes++ + if closes > 1 { + return + } + } + } +} + +func TestCloseNotifierChanLeak(t *testing.T) { + defer afterTest(t) + req := reqBytes("GET / HTTP/1.0\nHost: golang.org") + for i := 0; i < 20; i++ { + var output bytes.Buffer + conn := &rwTestConn{ + Reader: bytes.NewReader(req), + Writer: &output, + closec: make(chan bool, 1), + } + ln := &oneConnListener{conn: conn} + handler := HandlerFunc(func(rw ResponseWriter, r *Request) { + // Ignore the return value and never read from + // it, testing that we don't leak goroutines + // on the sending side: + _ = rw.(CloseNotifier).CloseNotify() + }) + go Serve(ln, handler) + <-conn.closec + } +} + +// Tests that we can use CloseNotifier in one request, and later call Hijack +// on a second request on the same connection. +// +// It also tests that the connReader stitches together its background +// 1-byte read for CloseNotifier when CloseNotifier doesn't fire with +// the rest of the second HTTP later. +// +// Issue 9763. +// HTTP/1-only test. (http2 doesn't have Hijack) +func TestHijackAfterCloseNotifier(t *testing.T) { + run(t, testHijackAfterCloseNotifier, []testMode{http1Mode}) +} +func testHijackAfterCloseNotifier(t *testing.T, mode testMode) { + script := make(chan string, 2) + script <- "closenotify" + script <- "hijack" + close(script) + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + plan := <-script + switch plan { + default: + panic("bogus plan; too many requests") + case "closenotify": + w.(CloseNotifier).CloseNotify() // discard result + w.Header().Set("X-Addr", r.RemoteAddr) + case "hijack": + c, _, err := w.(Hijacker).Hijack() + if err != nil { + t.Errorf("Hijack in Handler: %v", err) + return + } + if _, ok := c.(*net.TCPConn); !ok { + // Verify it's not wrapped in some type. + // Not strictly a go1 compat issue, but in practice it probably is. + t.Errorf("type of hijacked conn is %T; want *net.TCPConn", c) + } + fmt.Fprintf(c, "HTTP/1.0 200 OK\r\nX-Addr: %v\r\nContent-Length: 0\r\n\r\n", r.RemoteAddr) + c.Close() + return + } + })).ts + res1, err := ts.Client().Get(ts.URL) + if err != nil { + log.Fatal(err) + } + res2, err := ts.Client().Get(ts.URL) + if err != nil { + log.Fatal(err) + } + addr1 := res1.Header.Get("X-Addr") + addr2 := res2.Header.Get("X-Addr") + if addr1 == "" || addr1 != addr2 { + t.Errorf("addr1, addr2 = %q, %q; want same", addr1, addr2) + } +} + +func TestHijackBeforeRequestBodyRead(t *testing.T) { + run(t, testHijackBeforeRequestBodyRead, []testMode{http1Mode}) +} +func testHijackBeforeRequestBodyRead(t *testing.T, mode testMode) { + var requestBody = bytes.Repeat([]byte("a"), 1<<20) + bodyOkay := make(chan bool, 1) + gotCloseNotify := make(chan bool, 1) + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + defer close(bodyOkay) // caller will read false if nothing else + + reqBody := r.Body + r.Body = nil // to test that server.go doesn't use this value. + + gone := w.(CloseNotifier).CloseNotify() + slurp, err := io.ReadAll(reqBody) + if err != nil { + t.Errorf("Body read: %v", err) + return + } + if len(slurp) != len(requestBody) { + t.Errorf("Backend read %d request body bytes; want %d", len(slurp), len(requestBody)) + return + } + if !bytes.Equal(slurp, requestBody) { + t.Error("Backend read wrong request body.") // 1MB; omitting details + return + } + bodyOkay <- true + <-gone + gotCloseNotify <- true + })).ts + + conn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatal(err) + } + defer conn.Close() + + fmt.Fprintf(conn, "POST / HTTP/1.1\r\nHost: foo\r\nContent-Length: %d\r\n\r\n%s", + len(requestBody), requestBody) + if !<-bodyOkay { + // already failed. + return + } + conn.Close() + <-gotCloseNotify +} + +func TestOptions(t *testing.T) { run(t, testOptions, []testMode{http1Mode}) } +func testOptions(t *testing.T, mode testMode) { + uric := make(chan string, 2) // only expect 1, but leave space for 2 + mux := NewServeMux() + mux.HandleFunc("/", func(w ResponseWriter, r *Request) { + uric <- r.RequestURI + }) + ts := newClientServerTest(t, mode, mux).ts + + conn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatal(err) + } + defer conn.Close() + + // An OPTIONS * request should succeed. + _, err = conn.Write([]byte("OPTIONS * HTTP/1.1\r\nHost: foo.com\r\n\r\n")) + if err != nil { + t.Fatal(err) + } + br := bufio.NewReader(conn) + res, err := ReadResponse(br, &Request{Method: "OPTIONS"}) + if err != nil { + t.Fatal(err) + } + if res.StatusCode != 200 { + t.Errorf("Got non-200 response to OPTIONS *: %#v", res) + } + + // A GET * request on a ServeMux should fail. + _, err = conn.Write([]byte("GET * HTTP/1.1\r\nHost: foo.com\r\n\r\n")) + if err != nil { + t.Fatal(err) + } + res, err = ReadResponse(br, &Request{Method: "GET"}) + if err != nil { + t.Fatal(err) + } + if res.StatusCode != 400 { + t.Errorf("Got non-400 response to GET *: %#v", res) + } + + res, err = Get(ts.URL + "/second") + if err != nil { + t.Fatal(err) + } + res.Body.Close() + if got := <-uric; got != "/second" { + t.Errorf("Handler saw request for %q; want /second", got) + } +} + +func TestOptionsHandler(t *testing.T) { run(t, testOptionsHandler, []testMode{http1Mode}) } +func testOptionsHandler(t *testing.T, mode testMode) { + rc := make(chan *Request, 1) + + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + rc <- r + }), func(ts *httptest.Server) { + ts.Config.DisableGeneralOptionsHandler = true + }).ts + + conn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatal(err) + } + defer conn.Close() + + _, err = conn.Write([]byte("OPTIONS * HTTP/1.1\r\nHost: foo.com\r\n\r\n")) + if err != nil { + t.Fatal(err) + } + + if got := <-rc; got.Method != "OPTIONS" || got.RequestURI != "*" { + t.Errorf("Expected OPTIONS * request, got %v", got) + } +} + +// Tests regarding the ordering of Write, WriteHeader, Header, and +// Flush calls. In Go 1.0, rw.WriteHeader immediately flushed the +// (*response).header to the wire. In Go 1.1, the actual wire flush is +// delayed, so we could maybe tack on a Content-Length and better +// Content-Type after we see more (or all) of the output. To preserve +// compatibility with Go 1, we need to be careful to track which +// headers were live at the time of WriteHeader, so we write the same +// ones, even if the handler modifies them (~erroneously) after the +// first Write. +func TestHeaderToWire(t *testing.T) { + tests := []struct { + name string + handler func(ResponseWriter, *Request) + check func(got, logs string) error + }{ + { + name: "write without Header", + handler: func(rw ResponseWriter, r *Request) { + rw.Write([]byte("hello world")) + }, + check: func(got, logs string) error { + if !strings.Contains(got, "Content-Length:") { + return errors.New("no content-length") + } + if !strings.Contains(got, "Content-Type: text/plain") { + return errors.New("no content-type") + } + return nil + }, + }, + { + name: "Header mutation before write", + handler: func(rw ResponseWriter, r *Request) { + h := rw.Header() + h.Set("Content-Type", "some/type") + rw.Write([]byte("hello world")) + h.Set("Too-Late", "bogus") + }, + check: func(got, logs string) error { + if !strings.Contains(got, "Content-Length:") { + return errors.New("no content-length") + } + if !strings.Contains(got, "Content-Type: some/type") { + return errors.New("wrong content-type") + } + if strings.Contains(got, "Too-Late") { + return errors.New("don't want too-late header") + } + return nil + }, + }, + { + name: "write then useless Header mutation", + handler: func(rw ResponseWriter, r *Request) { + rw.Write([]byte("hello world")) + rw.Header().Set("Too-Late", "Write already wrote headers") + }, + check: func(got, logs string) error { + if strings.Contains(got, "Too-Late") { + return errors.New("header appeared from after WriteHeader") + } + return nil + }, + }, + { + name: "flush then write", + handler: func(rw ResponseWriter, r *Request) { + rw.(Flusher).Flush() + rw.Write([]byte("post-flush")) + rw.Header().Set("Too-Late", "Write already wrote headers") + }, + check: func(got, logs string) error { + if !strings.Contains(got, "Transfer-Encoding: chunked") { + return errors.New("not chunked") + } + if strings.Contains(got, "Too-Late") { + return errors.New("header appeared from after WriteHeader") + } + return nil + }, + }, + { + name: "header then flush", + handler: func(rw ResponseWriter, r *Request) { + rw.Header().Set("Content-Type", "some/type") + rw.(Flusher).Flush() + rw.Write([]byte("post-flush")) + rw.Header().Set("Too-Late", "Write already wrote headers") + }, + check: func(got, logs string) error { + if !strings.Contains(got, "Transfer-Encoding: chunked") { + return errors.New("not chunked") + } + if strings.Contains(got, "Too-Late") { + return errors.New("header appeared from after WriteHeader") + } + if !strings.Contains(got, "Content-Type: some/type") { + return errors.New("wrong content-type") + } + return nil + }, + }, + { + name: "sniff-on-first-write content-type", + handler: func(rw ResponseWriter, r *Request) { + rw.Write([]byte("<html><head></head><body>some html</body></html>")) + rw.Header().Set("Content-Type", "x/wrong") + }, + check: func(got, logs string) error { + if !strings.Contains(got, "Content-Type: text/html") { + return errors.New("wrong content-type; want html") + } + return nil + }, + }, + { + name: "explicit content-type wins", + handler: func(rw ResponseWriter, r *Request) { + rw.Header().Set("Content-Type", "some/type") + rw.Write([]byte("<html><head></head><body>some html</body></html>")) + }, + check: func(got, logs string) error { + if !strings.Contains(got, "Content-Type: some/type") { + return errors.New("wrong content-type; want html") + } + return nil + }, + }, + { + name: "empty handler", + handler: func(rw ResponseWriter, r *Request) { + }, + check: func(got, logs string) error { + if !strings.Contains(got, "Content-Length: 0") { + return errors.New("want 0 content-length") + } + return nil + }, + }, + { + name: "only Header, no write", + handler: func(rw ResponseWriter, r *Request) { + rw.Header().Set("Some-Header", "some-value") + }, + check: func(got, logs string) error { + if !strings.Contains(got, "Some-Header") { + return errors.New("didn't get header") + } + return nil + }, + }, + { + name: "WriteHeader call", + handler: func(rw ResponseWriter, r *Request) { + rw.WriteHeader(404) + rw.Header().Set("Too-Late", "some-value") + }, + check: func(got, logs string) error { + if !strings.Contains(got, "404") { + return errors.New("wrong status") + } + if strings.Contains(got, "Too-Late") { + return errors.New("shouldn't have seen Too-Late") + } + return nil + }, + }, + } + for _, tc := range tests { + ht := newHandlerTest(HandlerFunc(tc.handler)) + got := ht.rawResponse("GET / HTTP/1.1\nHost: golang.org") + logs := ht.logbuf.String() + if err := tc.check(got, logs); err != nil { + t.Errorf("%s: %v\nGot response:\n%s\n\n%s", tc.name, err, got, logs) + } + } +} + +type errorListener struct { + errs []error +} + +func (l *errorListener) Accept() (c net.Conn, err error) { + if len(l.errs) == 0 { + return nil, io.EOF + } + err = l.errs[0] + l.errs = l.errs[1:] + return +} + +func (l *errorListener) Close() error { + return nil +} + +func (l *errorListener) Addr() net.Addr { + return dummyAddr("test-address") +} + +func TestAcceptMaxFds(t *testing.T) { + setParallel(t) + + ln := &errorListener{[]error{ + &net.OpError{ + Op: "accept", + Err: syscall.EMFILE, + }}} + server := &Server{ + Handler: HandlerFunc(HandlerFunc(func(ResponseWriter, *Request) {})), + ErrorLog: log.New(io.Discard, "", 0), // noisy otherwise + } + err := server.Serve(ln) + if err != io.EOF { + t.Errorf("got error %v, want EOF", err) + } +} + +func TestWriteAfterHijack(t *testing.T) { + req := reqBytes("GET / HTTP/1.1\nHost: golang.org") + var buf strings.Builder + wrotec := make(chan bool, 1) + conn := &rwTestConn{ + Reader: bytes.NewReader(req), + Writer: &buf, + closec: make(chan bool, 1), + } + handler := HandlerFunc(func(rw ResponseWriter, r *Request) { + conn, bufrw, err := rw.(Hijacker).Hijack() + if err != nil { + t.Error(err) + return + } + go func() { + bufrw.Write([]byte("[hijack-to-bufw]")) + bufrw.Flush() + conn.Write([]byte("[hijack-to-conn]")) + conn.Close() + wrotec <- true + }() + }) + ln := &oneConnListener{conn: conn} + go Serve(ln, handler) + <-conn.closec + <-wrotec + if g, w := buf.String(), "[hijack-to-bufw][hijack-to-conn]"; g != w { + t.Errorf("wrote %q; want %q", g, w) + } +} + +func TestDoubleHijack(t *testing.T) { + req := reqBytes("GET / HTTP/1.1\nHost: golang.org") + var buf bytes.Buffer + conn := &rwTestConn{ + Reader: bytes.NewReader(req), + Writer: &buf, + closec: make(chan bool, 1), + } + handler := HandlerFunc(func(rw ResponseWriter, r *Request) { + conn, _, err := rw.(Hijacker).Hijack() + if err != nil { + t.Error(err) + return + } + _, _, err = rw.(Hijacker).Hijack() + if err == nil { + t.Errorf("got err = nil; want err != nil") + } + conn.Close() + }) + ln := &oneConnListener{conn: conn} + go Serve(ln, handler) + <-conn.closec +} + +// https://golang.org/issue/5955 +// Note that this does not test the "request too large" +// exit path from the http server. This is intentional; +// not sending Connection: close is just a minor wire +// optimization and is pointless if dealing with a +// badly behaved client. +func TestHTTP10ConnectionHeader(t *testing.T) { + run(t, testHTTP10ConnectionHeader, []testMode{http1Mode}) +} +func testHTTP10ConnectionHeader(t *testing.T, mode testMode) { + mux := NewServeMux() + mux.Handle("/", HandlerFunc(func(ResponseWriter, *Request) {})) + ts := newClientServerTest(t, mode, mux).ts + + // net/http uses HTTP/1.1 for requests, so write requests manually + tests := []struct { + req string // raw http request + expect []string // expected Connection header(s) + }{ + { + req: "GET / HTTP/1.0\r\n\r\n", + expect: nil, + }, + { + req: "OPTIONS * HTTP/1.0\r\n\r\n", + expect: nil, + }, + { + req: "GET / HTTP/1.0\r\nConnection: keep-alive\r\n\r\n", + expect: []string{"keep-alive"}, + }, + } + + for _, tt := range tests { + conn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatal("dial err:", err) + } + + _, err = fmt.Fprint(conn, tt.req) + if err != nil { + t.Fatal("conn write err:", err) + } + + resp, err := ReadResponse(bufio.NewReader(conn), &Request{Method: "GET"}) + if err != nil { + t.Fatal("ReadResponse err:", err) + } + conn.Close() + resp.Body.Close() + + got := resp.Header["Connection"] + if !reflect.DeepEqual(got, tt.expect) { + t.Errorf("wrong Connection headers for request %q. Got %q expect %q", tt.req, got, tt.expect) + } + } +} + +// See golang.org/issue/5660 +func TestServerReaderFromOrder(t *testing.T) { run(t, testServerReaderFromOrder) } +func testServerReaderFromOrder(t *testing.T, mode testMode) { + pr, pw := io.Pipe() + const size = 3 << 20 + cst := newClientServerTest(t, mode, HandlerFunc(func(rw ResponseWriter, req *Request) { + rw.Header().Set("Content-Type", "text/plain") // prevent sniffing path + done := make(chan bool) + go func() { + io.Copy(rw, pr) + close(done) + }() + time.Sleep(25 * time.Millisecond) // give Copy a chance to break things + n, err := io.Copy(io.Discard, req.Body) + if err != nil { + t.Errorf("handler Copy: %v", err) + return + } + if n != size { + t.Errorf("handler Copy = %d; want %d", n, size) + } + pw.Write([]byte("hi")) + pw.Close() + <-done + })) + + req, err := NewRequest("POST", cst.ts.URL, io.LimitReader(neverEnding('a'), size)) + if err != nil { + t.Fatal(err) + } + res, err := cst.c.Do(req) + if err != nil { + t.Fatal(err) + } + all, err := io.ReadAll(res.Body) + if err != nil { + t.Fatal(err) + } + res.Body.Close() + if string(all) != "hi" { + t.Errorf("Body = %q; want hi", all) + } +} + +// Issue 6157, Issue 6685 +func TestCodesPreventingContentTypeAndBody(t *testing.T) { + for _, code := range []int{StatusNotModified, StatusNoContent} { + ht := newHandlerTest(HandlerFunc(func(w ResponseWriter, r *Request) { + if r.URL.Path == "/header" { + w.Header().Set("Content-Length", "123") + } + w.WriteHeader(code) + if r.URL.Path == "/more" { + w.Write([]byte("stuff")) + } + })) + for _, req := range []string{ + "GET / HTTP/1.0", + "GET /header HTTP/1.0", + "GET /more HTTP/1.0", + "GET / HTTP/1.1\nHost: foo", + "GET /header HTTP/1.1\nHost: foo", + "GET /more HTTP/1.1\nHost: foo", + } { + got := ht.rawResponse(req) + wantStatus := fmt.Sprintf("%d %s", code, StatusText(code)) + if !strings.Contains(got, wantStatus) { + t.Errorf("Code %d: Wanted %q Modified for %q: %s", code, wantStatus, req, got) + } else if strings.Contains(got, "Content-Length") { + t.Errorf("Code %d: Got a Content-Length from %q: %s", code, req, got) + } else if strings.Contains(got, "stuff") { + t.Errorf("Code %d: Response contains a body from %q: %s", code, req, got) + } + } + } +} + +func TestContentTypeOkayOn204(t *testing.T) { + ht := newHandlerTest(HandlerFunc(func(w ResponseWriter, r *Request) { + w.Header().Set("Content-Length", "123") // suppressed + w.Header().Set("Content-Type", "foo/bar") + w.WriteHeader(204) + })) + got := ht.rawResponse("GET / HTTP/1.1\nHost: foo") + if !strings.Contains(got, "Content-Type: foo/bar") { + t.Errorf("Response = %q; want Content-Type: foo/bar", got) + } + if strings.Contains(got, "Content-Length: 123") { + t.Errorf("Response = %q; don't want a Content-Length", got) + } +} + +// Issue 6995 +// A server Handler can receive a Request, and then turn around and +// give a copy of that Request.Body out to the Transport (e.g. any +// proxy). So then two people own that Request.Body (both the server +// and the http client), and both think they can close it on failure. +// Therefore, all incoming server requests Bodies need to be thread-safe. +func TestTransportAndServerSharedBodyRace(t *testing.T) { + run(t, testTransportAndServerSharedBodyRace) +} +func testTransportAndServerSharedBodyRace(t *testing.T, mode testMode) { + const bodySize = 1 << 20 + + // errorf is like t.Errorf, but also writes to println. When + // this test fails, it hangs. This helps debugging and I've + // added this enough times "temporarily". It now gets added + // full time. + errorf := func(format string, args ...any) { + v := fmt.Sprintf(format, args...) + println(v) + t.Error(v) + } + + unblockBackend := make(chan bool) + backend := newClientServerTest(t, mode, HandlerFunc(func(rw ResponseWriter, req *Request) { + gone := rw.(CloseNotifier).CloseNotify() + didCopy := make(chan any) + go func() { + n, err := io.CopyN(rw, req.Body, bodySize) + didCopy <- []any{n, err} + }() + isGone := false + Loop: + for { + select { + case <-didCopy: + break Loop + case <-gone: + isGone = true + case <-time.After(time.Second): + println("1 second passes in backend, proxygone=", isGone) + } + } + <-unblockBackend + })) + defer backend.close() + + backendRespc := make(chan *Response, 1) + var proxy *clientServerTest + proxy = newClientServerTest(t, mode, HandlerFunc(func(rw ResponseWriter, req *Request) { + req2, _ := NewRequest("POST", backend.ts.URL, req.Body) + req2.ContentLength = bodySize + cancel := make(chan struct{}) + req2.Cancel = cancel + + bresp, err := proxy.c.Do(req2) + if err != nil { + errorf("Proxy outbound request: %v", err) + return + } + _, err = io.CopyN(io.Discard, bresp.Body, bodySize/2) + if err != nil { + errorf("Proxy copy error: %v", err) + return + } + backendRespc <- bresp // to close later + + // Try to cause a race: Both the Transport and the proxy handler's Server + // will try to read/close req.Body (aka req2.Body) + if mode == http2Mode { + close(cancel) + } else { + proxy.c.Transport.(*Transport).CancelRequest(req2) + } + rw.Write([]byte("OK")) + })) + defer proxy.close() + + defer close(unblockBackend) + req, _ := NewRequest("POST", proxy.ts.URL, io.LimitReader(neverEnding('a'), bodySize)) + res, err := proxy.c.Do(req) + if err != nil { + t.Fatalf("Original request: %v", err) + } + + // Cleanup, so we don't leak goroutines. + res.Body.Close() + select { + case res := <-backendRespc: + res.Body.Close() + default: + // We failed earlier. (e.g. on proxy.c.Do(req2)) + } +} + +// Test that a hanging Request.Body.Read from another goroutine can't +// cause the Handler goroutine's Request.Body.Close to block. +// See issue 7121. +func TestRequestBodyCloseDoesntBlock(t *testing.T) { + run(t, testRequestBodyCloseDoesntBlock, []testMode{http1Mode}) +} +func testRequestBodyCloseDoesntBlock(t *testing.T, mode testMode) { + if testing.Short() { + t.Skip("skipping in -short mode") + } + + readErrCh := make(chan error, 1) + errCh := make(chan error, 2) + + server := newClientServerTest(t, mode, HandlerFunc(func(rw ResponseWriter, req *Request) { + go func(body io.Reader) { + _, err := body.Read(make([]byte, 100)) + readErrCh <- err + }(req.Body) + time.Sleep(500 * time.Millisecond) + })).ts + + closeConn := make(chan bool) + defer close(closeConn) + go func() { + conn, err := net.Dial("tcp", server.Listener.Addr().String()) + if err != nil { + errCh <- err + return + } + defer conn.Close() + _, err = conn.Write([]byte("POST / HTTP/1.1\r\nConnection: close\r\nHost: foo\r\nContent-Length: 100000\r\n\r\n")) + if err != nil { + errCh <- err + return + } + // And now just block, making the server block on our + // 100000 bytes of body that will never arrive. + <-closeConn + }() + select { + case err := <-readErrCh: + if err == nil { + t.Error("Read was nil. Expected error.") + } + case err := <-errCh: + t.Error(err) + } +} + +// test that ResponseWriter implements io.StringWriter. +func TestResponseWriterWriteString(t *testing.T) { + okc := make(chan bool, 1) + ht := newHandlerTest(HandlerFunc(func(w ResponseWriter, r *Request) { + _, ok := w.(io.StringWriter) + okc <- ok + })) + ht.rawResponse("GET / HTTP/1.0") + select { + case ok := <-okc: + if !ok { + t.Error("ResponseWriter did not implement io.StringWriter") + } + default: + t.Error("handler was never called") + } +} + +func TestAppendTime(t *testing.T) { + var b [len(TimeFormat)]byte + t1 := time.Date(2013, 9, 21, 15, 41, 0, 0, time.FixedZone("CEST", 2*60*60)) + res := ExportAppendTime(b[:0], t1) + t2, err := ParseTime(string(res)) + if err != nil { + t.Fatalf("Error parsing time: %s", err) + } + if !t1.Equal(t2) { + t.Fatalf("Times differ; expected: %v, got %v (%s)", t1, t2, string(res)) + } +} + +func TestServerConnState(t *testing.T) { run(t, testServerConnState, []testMode{http1Mode}) } +func testServerConnState(t *testing.T, mode testMode) { + handler := map[string]func(w ResponseWriter, r *Request){ + "/": func(w ResponseWriter, r *Request) { + fmt.Fprintf(w, "Hello.") + }, + "/close": func(w ResponseWriter, r *Request) { + w.Header().Set("Connection", "close") + fmt.Fprintf(w, "Hello.") + }, + "/hijack": func(w ResponseWriter, r *Request) { + c, _, _ := w.(Hijacker).Hijack() + c.Write([]byte("HTTP/1.0 200 OK\r\nConnection: close\r\n\r\nHello.")) + c.Close() + }, + "/hijack-panic": func(w ResponseWriter, r *Request) { + c, _, _ := w.(Hijacker).Hijack() + c.Write([]byte("HTTP/1.0 200 OK\r\nConnection: close\r\n\r\nHello.")) + c.Close() + panic("intentional panic") + }, + } + + // A stateLog is a log of states over the lifetime of a connection. + type stateLog struct { + active net.Conn // The connection for which the log is recorded; set to the first connection seen in StateNew. + got []ConnState + want []ConnState + complete chan<- struct{} // If non-nil, closed when either 'got' is equal to 'want', or 'got' is no longer a prefix of 'want'. + } + activeLog := make(chan *stateLog, 1) + + // wantLog invokes doRequests, then waits for the resulting connection to + // either pass through the sequence of states in want or enter a state outside + // of that sequence. + wantLog := func(doRequests func(), want ...ConnState) { + t.Helper() + complete := make(chan struct{}) + activeLog <- &stateLog{want: want, complete: complete} + + doRequests() + + <-complete + sl := <-activeLog + if !reflect.DeepEqual(sl.got, sl.want) { + t.Errorf("Request(s) produced unexpected state sequence.\nGot: %v\nWant: %v", sl.got, sl.want) + } + // Don't return sl to activeLog: we don't expect any further states after + // this point, and want to keep the ConnState callback blocked until the + // next call to wantLog. + } + + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + handler[r.URL.Path](w, r) + }), func(ts *httptest.Server) { + ts.Config.ErrorLog = log.New(io.Discard, "", 0) + ts.Config.ConnState = func(c net.Conn, state ConnState) { + if c == nil { + t.Errorf("nil conn seen in state %s", state) + return + } + sl := <-activeLog + if sl.active == nil && state == StateNew { + sl.active = c + } else if sl.active != c { + t.Errorf("unexpected conn in state %s", state) + activeLog <- sl + return + } + sl.got = append(sl.got, state) + if sl.complete != nil && (len(sl.got) >= len(sl.want) || !reflect.DeepEqual(sl.got, sl.want[:len(sl.got)])) { + close(sl.complete) + sl.complete = nil + } + activeLog <- sl + } + }).ts + defer func() { + activeLog <- &stateLog{} // If the test failed, allow any remaining ConnState callbacks to complete. + ts.Close() + }() + + c := ts.Client() + + mustGet := func(url string, headers ...string) { + t.Helper() + req, err := NewRequest("GET", url, nil) + if err != nil { + t.Fatal(err) + } + for len(headers) > 0 { + req.Header.Add(headers[0], headers[1]) + headers = headers[2:] + } + res, err := c.Do(req) + if err != nil { + t.Errorf("Error fetching %s: %v", url, err) + return + } + _, err = io.ReadAll(res.Body) + defer res.Body.Close() + if err != nil { + t.Errorf("Error reading %s: %v", url, err) + } + } + + wantLog(func() { + mustGet(ts.URL + "/") + mustGet(ts.URL + "/close") + }, StateNew, StateActive, StateIdle, StateActive, StateClosed) + + wantLog(func() { + mustGet(ts.URL + "/") + mustGet(ts.URL+"/", "Connection", "close") + }, StateNew, StateActive, StateIdle, StateActive, StateClosed) + + wantLog(func() { + mustGet(ts.URL + "/hijack") + }, StateNew, StateActive, StateHijacked) + + wantLog(func() { + mustGet(ts.URL + "/hijack-panic") + }, StateNew, StateActive, StateHijacked) + + wantLog(func() { + c, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatal(err) + } + c.Close() + }, StateNew, StateClosed) + + wantLog(func() { + c, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatal(err) + } + if _, err := io.WriteString(c, "BOGUS REQUEST\r\n\r\n"); err != nil { + t.Fatal(err) + } + c.Read(make([]byte, 1)) // block until server hangs up on us + c.Close() + }, StateNew, StateActive, StateClosed) + + wantLog(func() { + c, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatal(err) + } + if _, err := io.WriteString(c, "GET / HTTP/1.1\r\nHost: foo\r\n\r\n"); err != nil { + t.Fatal(err) + } + res, err := ReadResponse(bufio.NewReader(c), nil) + if err != nil { + t.Fatal(err) + } + if _, err := io.Copy(io.Discard, res.Body); err != nil { + t.Fatal(err) + } + c.Close() + }, StateNew, StateActive, StateIdle, StateClosed) +} + +func TestServerKeepAlivesEnabledResultClose(t *testing.T) { + run(t, testServerKeepAlivesEnabledResultClose, []testMode{http1Mode}) +} +func testServerKeepAlivesEnabledResultClose(t *testing.T, mode testMode) { + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + }), func(ts *httptest.Server) { + ts.Config.SetKeepAlivesEnabled(false) + }).ts + res, err := ts.Client().Get(ts.URL) + if err != nil { + t.Fatal(err) + } + defer res.Body.Close() + if !res.Close { + t.Errorf("Body.Close == false; want true") + } +} + +// golang.org/issue/7856 +func TestServerEmptyBodyRace(t *testing.T) { run(t, testServerEmptyBodyRace) } +func testServerEmptyBodyRace(t *testing.T, mode testMode) { + var n int32 + cst := newClientServerTest(t, mode, HandlerFunc(func(rw ResponseWriter, req *Request) { + atomic.AddInt32(&n, 1) + }), optQuietLog) + var wg sync.WaitGroup + const reqs = 20 + for i := 0; i < reqs; i++ { + wg.Add(1) + go func() { + defer wg.Done() + res, err := cst.c.Get(cst.ts.URL) + if err != nil { + // Try to deflake spurious "connection reset by peer" under load. + // See golang.org/issue/22540. + time.Sleep(10 * time.Millisecond) + res, err = cst.c.Get(cst.ts.URL) + if err != nil { + t.Error(err) + return + } + } + defer res.Body.Close() + _, err = io.Copy(io.Discard, res.Body) + if err != nil { + t.Error(err) + return + } + }() + } + wg.Wait() + if got := atomic.LoadInt32(&n); got != reqs { + t.Errorf("handler ran %d times; want %d", got, reqs) + } +} + +func TestServerConnStateNew(t *testing.T) { + sawNew := false // if the test is buggy, we'll race on this variable. + srv := &Server{ + ConnState: func(c net.Conn, state ConnState) { + if state == StateNew { + sawNew = true // testing that this write isn't racy + } + }, + Handler: HandlerFunc(func(w ResponseWriter, r *Request) {}), // irrelevant + } + srv.Serve(&oneConnListener{ + conn: &rwTestConn{ + Reader: strings.NewReader("GET / HTTP/1.1\r\nHost: foo\r\n\r\n"), + Writer: io.Discard, + }, + }) + if !sawNew { // testing that this read isn't racy + t.Error("StateNew not seen") + } +} + +type closeWriteTestConn struct { + rwTestConn + didCloseWrite bool +} + +func (c *closeWriteTestConn) CloseWrite() error { + c.didCloseWrite = true + return nil +} + +func TestCloseWrite(t *testing.T) { + setParallel(t) + var srv Server + var testConn closeWriteTestConn + c := ExportServerNewConn(&srv, &testConn) + ExportCloseWriteAndWait(c) + if !testConn.didCloseWrite { + t.Error("didn't see CloseWrite call") + } +} + +// This verifies that a handler can Flush and then Hijack. +// +// A similar test crashed once during development, but it was only +// testing this tangentially and temporarily until another TODO was +// fixed. +// +// So add an explicit test for this. +func TestServerFlushAndHijack(t *testing.T) { run(t, testServerFlushAndHijack, []testMode{http1Mode}) } +func testServerFlushAndHijack(t *testing.T, mode testMode) { + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + io.WriteString(w, "Hello, ") + w.(Flusher).Flush() + conn, buf, _ := w.(Hijacker).Hijack() + buf.WriteString("6\r\nworld!\r\n0\r\n\r\n") + if err := buf.Flush(); err != nil { + t.Error(err) + } + if err := conn.Close(); err != nil { + t.Error(err) + } + })).ts + res, err := Get(ts.URL) + if err != nil { + t.Fatal(err) + } + defer res.Body.Close() + all, err := io.ReadAll(res.Body) + if err != nil { + t.Fatal(err) + } + if want := "Hello, world!"; string(all) != want { + t.Errorf("Got %q; want %q", all, want) + } +} + +// golang.org/issue/8534 -- the Server shouldn't reuse a connection +// for keep-alive after it's seen any Write error (e.g. a timeout) on +// that net.Conn. +// +// To test, verify we don't timeout or see fewer unique client +// addresses (== unique connections) than requests. +func TestServerKeepAliveAfterWriteError(t *testing.T) { + run(t, testServerKeepAliveAfterWriteError, []testMode{http1Mode}) +} +func testServerKeepAliveAfterWriteError(t *testing.T, mode testMode) { + if testing.Short() { + t.Skip("skipping in -short mode") + } + const numReq = 3 + addrc := make(chan string, numReq) + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + addrc <- r.RemoteAddr + time.Sleep(500 * time.Millisecond) + w.(Flusher).Flush() + }), func(ts *httptest.Server) { + ts.Config.WriteTimeout = 250 * time.Millisecond + }).ts + + errc := make(chan error, numReq) + go func() { + defer close(errc) + for i := 0; i < numReq; i++ { + res, err := Get(ts.URL) + if res != nil { + res.Body.Close() + } + errc <- err + } + }() + + addrSeen := map[string]bool{} + numOkay := 0 + for { + select { + case v := <-addrc: + addrSeen[v] = true + case err, ok := <-errc: + if !ok { + if len(addrSeen) != numReq { + t.Errorf("saw %d unique client addresses; want %d", len(addrSeen), numReq) + } + if numOkay != 0 { + t.Errorf("got %d successful client requests; want 0", numOkay) + } + return + } + if err == nil { + numOkay++ + } + } + } +} + +// Issue 9987: shouldn't add automatic Content-Length (or +// Content-Type) if a Transfer-Encoding was set by the handler. +func TestNoContentLengthIfTransferEncoding(t *testing.T) { + run(t, testNoContentLengthIfTransferEncoding, []testMode{http1Mode}) +} +func testNoContentLengthIfTransferEncoding(t *testing.T, mode testMode) { + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + w.Header().Set("Transfer-Encoding", "foo") + io.WriteString(w, "<html>") + })).ts + c, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatalf("Dial: %v", err) + } + defer c.Close() + if _, err := io.WriteString(c, "GET / HTTP/1.1\r\nHost: foo\r\n\r\n"); err != nil { + t.Fatal(err) + } + bs := bufio.NewScanner(c) + var got strings.Builder + for bs.Scan() { + if strings.TrimSpace(bs.Text()) == "" { + break + } + got.WriteString(bs.Text()) + got.WriteByte('\n') + } + if err := bs.Err(); err != nil { + t.Fatal(err) + } + if strings.Contains(got.String(), "Content-Length") { + t.Errorf("Unexpected Content-Length in response headers: %s", got.String()) + } + if strings.Contains(got.String(), "Content-Type") { + t.Errorf("Unexpected Content-Type in response headers: %s", got.String()) + } +} + +// tolerate extra CRLF(s) before Request-Line on subsequent requests on a conn +// Issue 10876. +func TestTolerateCRLFBeforeRequestLine(t *testing.T) { + req := []byte("POST / HTTP/1.1\r\nHost: golang.org\r\nContent-Length: 3\r\n\r\nABC" + + "\r\n\r\n" + // <-- this stuff is bogus, but we'll ignore it + "GET / HTTP/1.1\r\nHost: golang.org\r\n\r\n") + var buf bytes.Buffer + conn := &rwTestConn{ + Reader: bytes.NewReader(req), + Writer: &buf, + closec: make(chan bool, 1), + } + ln := &oneConnListener{conn: conn} + numReq := 0 + go Serve(ln, HandlerFunc(func(rw ResponseWriter, r *Request) { + numReq++ + })) + <-conn.closec + if numReq != 2 { + t.Errorf("num requests = %d; want 2", numReq) + t.Logf("Res: %s", buf.Bytes()) + } +} + +func TestIssue13893_Expect100(t *testing.T) { + // test that the Server doesn't filter out Expect headers. + req := reqBytes(`PUT /readbody HTTP/1.1 +User-Agent: PycURL/7.22.0 +Host: 127.0.0.1:9000 +Accept: */* +Expect: 100-continue +Content-Length: 10 + +HelloWorld + +`) + var buf bytes.Buffer + conn := &rwTestConn{ + Reader: bytes.NewReader(req), + Writer: &buf, + closec: make(chan bool, 1), + } + ln := &oneConnListener{conn: conn} + go Serve(ln, HandlerFunc(func(w ResponseWriter, r *Request) { + if _, ok := r.Header["Expect"]; !ok { + t.Error("Expect header should not be filtered out") + } + })) + <-conn.closec +} + +func TestIssue11549_Expect100(t *testing.T) { + req := reqBytes(`PUT /readbody HTTP/1.1 +User-Agent: PycURL/7.22.0 +Host: 127.0.0.1:9000 +Accept: */* +Expect: 100-continue +Content-Length: 10 + +HelloWorldPUT /noreadbody HTTP/1.1 +User-Agent: PycURL/7.22.0 +Host: 127.0.0.1:9000 +Accept: */* +Expect: 100-continue +Content-Length: 10 + +GET /should-be-ignored HTTP/1.1 +Host: foo + +`) + var buf strings.Builder + conn := &rwTestConn{ + Reader: bytes.NewReader(req), + Writer: &buf, + closec: make(chan bool, 1), + } + ln := &oneConnListener{conn: conn} + numReq := 0 + go Serve(ln, HandlerFunc(func(w ResponseWriter, r *Request) { + numReq++ + if r.URL.Path == "/readbody" { + io.ReadAll(r.Body) + } + io.WriteString(w, "Hello world!") + })) + <-conn.closec + if numReq != 2 { + t.Errorf("num requests = %d; want 2", numReq) + } + if !strings.Contains(buf.String(), "Connection: close\r\n") { + t.Errorf("expected 'Connection: close' in response; got: %s", buf.String()) + } +} + +// If a Handler finishes and there's an unread request body, +// verify the server try to do implicit read on it before replying. +func TestHandlerFinishSkipBigContentLengthRead(t *testing.T) { + setParallel(t) + conn := &testConn{closec: make(chan bool)} + conn.readBuf.Write([]byte(fmt.Sprintf( + "POST / HTTP/1.1\r\n" + + "Host: test\r\n" + + "Content-Length: 9999999999\r\n" + + "\r\n" + strings.Repeat("a", 1<<20)))) + + ls := &oneConnListener{conn} + var inHandlerLen int + go Serve(ls, HandlerFunc(func(rw ResponseWriter, req *Request) { + inHandlerLen = conn.readBuf.Len() + rw.WriteHeader(404) + })) + <-conn.closec + afterHandlerLen := conn.readBuf.Len() + + if afterHandlerLen != inHandlerLen { + t.Errorf("unexpected implicit read. Read buffer went from %d -> %d", inHandlerLen, afterHandlerLen) + } +} + +func TestHandlerSetsBodyNil(t *testing.T) { run(t, testHandlerSetsBodyNil) } +func testHandlerSetsBodyNil(t *testing.T, mode testMode) { + cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + r.Body = nil + fmt.Fprintf(w, "%v", r.RemoteAddr) + })) + get := func() string { + res, err := cst.c.Get(cst.ts.URL) + if err != nil { + t.Fatal(err) + } + defer res.Body.Close() + slurp, err := io.ReadAll(res.Body) + if err != nil { + t.Fatal(err) + } + return string(slurp) + } + a, b := get(), get() + if a != b { + t.Errorf("Failed to reuse connections between requests: %v vs %v", a, b) + } +} + +// Test that we validate the Host header. +// Issue 11206 (invalid bytes in Host) and 13624 (Host present in HTTP/1.1) +func TestServerValidatesHostHeader(t *testing.T) { + tests := []struct { + proto string + host string + want int + }{ + {"HTTP/0.9", "", 505}, + + {"HTTP/1.1", "", 400}, + {"HTTP/1.1", "Host: \r\n", 200}, + {"HTTP/1.1", "Host: 1.2.3.4\r\n", 200}, + {"HTTP/1.1", "Host: foo.com\r\n", 200}, + {"HTTP/1.1", "Host: foo-bar_baz.com\r\n", 200}, + {"HTTP/1.1", "Host: foo.com:80\r\n", 200}, + {"HTTP/1.1", "Host: ::1\r\n", 200}, + {"HTTP/1.1", "Host: [::1]\r\n", 200}, // questionable without port, but accept it + {"HTTP/1.1", "Host: [::1]:80\r\n", 200}, + {"HTTP/1.1", "Host: [::1%25en0]:80\r\n", 200}, + {"HTTP/1.1", "Host: 1.2.3.4\r\n", 200}, + {"HTTP/1.1", "Host: \x06\r\n", 400}, + {"HTTP/1.1", "Host: \xff\r\n", 400}, + {"HTTP/1.1", "Host: {\r\n", 400}, + {"HTTP/1.1", "Host: }\r\n", 400}, + {"HTTP/1.1", "Host: first\r\nHost: second\r\n", 400}, + + // HTTP/1.0 can lack a host header, but if present + // must play by the rules too: + {"HTTP/1.0", "", 200}, + {"HTTP/1.0", "Host: first\r\nHost: second\r\n", 400}, + {"HTTP/1.0", "Host: \xff\r\n", 400}, + + // Make an exception for HTTP upgrade requests: + {"PRI * HTTP/2.0", "", 200}, + + // Also an exception for CONNECT requests: (Issue 18215) + {"CONNECT golang.org:443 HTTP/1.1", "", 200}, + + // But not other HTTP/2 stuff: + {"PRI / HTTP/2.0", "", 505}, + {"GET / HTTP/2.0", "", 505}, + {"GET / HTTP/3.0", "", 505}, + } + for _, tt := range tests { + conn := &testConn{closec: make(chan bool, 1)} + methodTarget := "GET / " + if !strings.HasPrefix(tt.proto, "HTTP/") { + methodTarget = "" + } + io.WriteString(&conn.readBuf, methodTarget+tt.proto+"\r\n"+tt.host+"\r\n") + + ln := &oneConnListener{conn} + srv := Server{ + ErrorLog: quietLog, + Handler: HandlerFunc(func(ResponseWriter, *Request) {}), + } + go srv.Serve(ln) + <-conn.closec + res, err := ReadResponse(bufio.NewReader(&conn.writeBuf), nil) + if err != nil { + t.Errorf("For %s %q, ReadResponse: %v", tt.proto, tt.host, res) + continue + } + if res.StatusCode != tt.want { + t.Errorf("For %s %q, Status = %d; want %d", tt.proto, tt.host, res.StatusCode, tt.want) + } + } +} + +func TestServerHandlersCanHandleH2PRI(t *testing.T) { + run(t, testServerHandlersCanHandleH2PRI, []testMode{http1Mode}) +} +func testServerHandlersCanHandleH2PRI(t *testing.T, mode testMode) { + const upgradeResponse = "upgrade here" + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + conn, br, err := w.(Hijacker).Hijack() + if err != nil { + t.Error(err) + return + } + defer conn.Close() + if r.Method != "PRI" || r.RequestURI != "*" { + t.Errorf("Got method/target %q %q; want PRI *", r.Method, r.RequestURI) + return + } + if !r.Close { + t.Errorf("Request.Close = true; want false") + } + const want = "SM\r\n\r\n" + buf := make([]byte, len(want)) + n, err := io.ReadFull(br, buf) + if err != nil || string(buf[:n]) != want { + t.Errorf("Read = %v, %v (%q), want %q", n, err, buf[:n], want) + return + } + io.WriteString(conn, upgradeResponse) + })).ts + + c, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatalf("Dial: %v", err) + } + defer c.Close() + io.WriteString(c, "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n") + slurp, err := io.ReadAll(c) + if err != nil { + t.Fatal(err) + } + if string(slurp) != upgradeResponse { + t.Errorf("Handler response = %q; want %q", slurp, upgradeResponse) + } +} + +// Test that we validate the valid bytes in HTTP/1 headers. +// Issue 11207. +func TestServerValidatesHeaders(t *testing.T) { + setParallel(t) + tests := []struct { + header string + want int + }{ + {"", 200}, + {"Foo: bar\r\n", 200}, + {"X-Foo: bar\r\n", 200}, + {"Foo: a space\r\n", 200}, + + {"A space: foo\r\n", 400}, // space in header + {"foo\xffbar: foo\r\n", 400}, // binary in header + {"foo\x00bar: foo\r\n", 400}, // binary in header + {"Foo: " + strings.Repeat("x", 1<<21) + "\r\n", 431}, // header too large + // Spaces between the header key and colon are not allowed. + // See RFC 7230, Section 3.2.4. + {"Foo : bar\r\n", 400}, + {"Foo\t: bar\r\n", 400}, + + {"foo: foo foo\r\n", 200}, // LWS space is okay + {"foo: foo\tfoo\r\n", 200}, // LWS tab is okay + {"foo: foo\x00foo\r\n", 400}, // CTL 0x00 in value is bad + {"foo: foo\x7ffoo\r\n", 400}, // CTL 0x7f in value is bad + {"foo: foo\xfffoo\r\n", 200}, // non-ASCII high octets in value are fine + } + for _, tt := range tests { + conn := &testConn{closec: make(chan bool, 1)} + io.WriteString(&conn.readBuf, "GET / HTTP/1.1\r\nHost: foo\r\n"+tt.header+"\r\n") + + ln := &oneConnListener{conn} + srv := Server{ + ErrorLog: quietLog, + Handler: HandlerFunc(func(ResponseWriter, *Request) {}), + } + go srv.Serve(ln) + <-conn.closec + res, err := ReadResponse(bufio.NewReader(&conn.writeBuf), nil) + if err != nil { + t.Errorf("For %q, ReadResponse: %v", tt.header, res) + continue + } + if res.StatusCode != tt.want { + t.Errorf("For %q, Status = %d; want %d", tt.header, res.StatusCode, tt.want) + } + } +} + +func TestServerRequestContextCancel_ServeHTTPDone(t *testing.T) { + run(t, testServerRequestContextCancel_ServeHTTPDone) +} +func testServerRequestContextCancel_ServeHTTPDone(t *testing.T, mode testMode) { + ctxc := make(chan context.Context, 1) + cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + ctx := r.Context() + select { + case <-ctx.Done(): + t.Error("should not be Done in ServeHTTP") + default: + } + ctxc <- ctx + })) + res, err := cst.c.Get(cst.ts.URL) + if err != nil { + t.Fatal(err) + } + res.Body.Close() + ctx := <-ctxc + select { + case <-ctx.Done(): + default: + t.Error("context should be done after ServeHTTP completes") + } +} + +// Tests that the Request.Context available to the Handler is canceled +// if the peer closes their TCP connection. This requires that the server +// is always blocked in a Read call so it notices the EOF from the client. +// See issues 15927 and 15224. +func TestServerRequestContextCancel_ConnClose(t *testing.T) { + run(t, testServerRequestContextCancel_ConnClose, []testMode{http1Mode}) +} +func testServerRequestContextCancel_ConnClose(t *testing.T, mode testMode) { + inHandler := make(chan struct{}) + handlerDone := make(chan struct{}) + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + close(inHandler) + <-r.Context().Done() + close(handlerDone) + })).ts + c, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatal(err) + } + defer c.Close() + io.WriteString(c, "GET / HTTP/1.1\r\nHost: foo\r\n\r\n") + <-inHandler + c.Close() // this should trigger the context being done + <-handlerDone +} + +func TestServerContext_ServerContextKey(t *testing.T) { + run(t, testServerContext_ServerContextKey) +} +func testServerContext_ServerContextKey(t *testing.T, mode testMode) { + cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + ctx := r.Context() + got := ctx.Value(ServerContextKey) + if _, ok := got.(*Server); !ok { + t.Errorf("context value = %T; want *http.Server", got) + } + })) + res, err := cst.c.Get(cst.ts.URL) + if err != nil { + t.Fatal(err) + } + res.Body.Close() +} + +func TestServerContext_LocalAddrContextKey(t *testing.T) { + run(t, testServerContext_LocalAddrContextKey) +} +func testServerContext_LocalAddrContextKey(t *testing.T, mode testMode) { + ch := make(chan any, 1) + cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + ch <- r.Context().Value(LocalAddrContextKey) + })) + if _, err := cst.c.Head(cst.ts.URL); err != nil { + t.Fatal(err) + } + + host := cst.ts.Listener.Addr().String() + got := <-ch + if addr, ok := got.(net.Addr); !ok { + t.Errorf("local addr value = %T; want net.Addr", got) + } else if fmt.Sprint(addr) != host { + t.Errorf("local addr = %v; want %v", addr, host) + } +} + +// https://golang.org/issue/15960 +func TestHandlerSetTransferEncodingChunked(t *testing.T) { + setParallel(t) + defer afterTest(t) + ht := newHandlerTest(HandlerFunc(func(w ResponseWriter, r *Request) { + w.Header().Set("Transfer-Encoding", "chunked") + w.Write([]byte("hello")) + })) + resp := ht.rawResponse("GET / HTTP/1.1\nHost: foo") + const hdr = "Transfer-Encoding: chunked" + if n := strings.Count(resp, hdr); n != 1 { + t.Errorf("want 1 occurrence of %q in response, got %v\nresponse: %v", hdr, n, resp) + } +} + +// https://golang.org/issue/16063 +func TestHandlerSetTransferEncodingGzip(t *testing.T) { + setParallel(t) + defer afterTest(t) + ht := newHandlerTest(HandlerFunc(func(w ResponseWriter, r *Request) { + w.Header().Set("Transfer-Encoding", "gzip") + gz := gzip.NewWriter(w) + gz.Write([]byte("hello")) + gz.Close() + })) + resp := ht.rawResponse("GET / HTTP/1.1\nHost: foo") + for _, v := range []string{"gzip", "chunked"} { + hdr := "Transfer-Encoding: " + v + if n := strings.Count(resp, hdr); n != 1 { + t.Errorf("want 1 occurrence of %q in response, got %v\nresponse: %v", hdr, n, resp) + } + } +} + +func BenchmarkClientServer(b *testing.B) { + run(b, benchmarkClientServer, []testMode{http1Mode, https1Mode, http2Mode}) +} +func benchmarkClientServer(b *testing.B, mode testMode) { + b.ReportAllocs() + b.StopTimer() + ts := newClientServerTest(b, mode, HandlerFunc(func(rw ResponseWriter, r *Request) { + fmt.Fprintf(rw, "Hello world.\n") + })).ts + b.StartTimer() + + c := ts.Client() + for i := 0; i < b.N; i++ { + res, err := c.Get(ts.URL) + if err != nil { + b.Fatal("Get:", err) + } + all, err := io.ReadAll(res.Body) + res.Body.Close() + if err != nil { + b.Fatal("ReadAll:", err) + } + body := string(all) + if body != "Hello world.\n" { + b.Fatal("Got body:", body) + } + } + + b.StopTimer() +} + +func BenchmarkClientServerParallel(b *testing.B) { + for _, parallelism := range []int{4, 64} { + b.Run(fmt.Sprint(parallelism), func(b *testing.B) { + run(b, func(b *testing.B, mode testMode) { + benchmarkClientServerParallel(b, parallelism, mode) + }, []testMode{http1Mode, https1Mode, http2Mode}) + }) + } +} + +func benchmarkClientServerParallel(b *testing.B, parallelism int, mode testMode) { + b.ReportAllocs() + ts := newClientServerTest(b, mode, HandlerFunc(func(rw ResponseWriter, r *Request) { + fmt.Fprintf(rw, "Hello world.\n") + })).ts + b.ResetTimer() + b.SetParallelism(parallelism) + b.RunParallel(func(pb *testing.PB) { + c := ts.Client() + for pb.Next() { + res, err := c.Get(ts.URL) + if err != nil { + b.Logf("Get: %v", err) + continue + } + all, err := io.ReadAll(res.Body) + res.Body.Close() + if err != nil { + b.Logf("ReadAll: %v", err) + continue + } + body := string(all) + if body != "Hello world.\n" { + panic("Got body: " + body) + } + } + }) +} + +// A benchmark for profiling the server without the HTTP client code. +// The client code runs in a subprocess. +// +// For use like: +// +// $ go test -c +// $ ./http.test -test.run=XX -test.bench=BenchmarkServer -test.benchtime=15s -test.cpuprofile=http.prof +// $ go tool pprof http.test http.prof +// (pprof) web +func BenchmarkServer(b *testing.B) { + b.ReportAllocs() + // Child process mode; + if url := os.Getenv("TEST_BENCH_SERVER_URL"); url != "" { + n, err := strconv.Atoi(os.Getenv("TEST_BENCH_CLIENT_N")) + if err != nil { + panic(err) + } + for i := 0; i < n; i++ { + res, err := Get(url) + if err != nil { + log.Panicf("Get: %v", err) + } + all, err := io.ReadAll(res.Body) + res.Body.Close() + if err != nil { + log.Panicf("ReadAll: %v", err) + } + body := string(all) + if body != "Hello world.\n" { + log.Panicf("Got body: %q", body) + } + } + os.Exit(0) + return + } + + var res = []byte("Hello world.\n") + b.StopTimer() + ts := httptest.NewServer(HandlerFunc(func(rw ResponseWriter, r *Request) { + rw.Header().Set("Content-Type", "text/html; charset=utf-8") + rw.Write(res) + })) + defer ts.Close() + b.StartTimer() + + cmd := exec.Command(os.Args[0], "-test.run=XXXX", "-test.bench=BenchmarkServer$") + cmd.Env = append([]string{ + fmt.Sprintf("TEST_BENCH_CLIENT_N=%d", b.N), + fmt.Sprintf("TEST_BENCH_SERVER_URL=%s", ts.URL), + }, os.Environ()...) + out, err := cmd.CombinedOutput() + if err != nil { + b.Errorf("Test failure: %v, with output: %s", err, out) + } +} + +// getNoBody wraps Get but closes any Response.Body before returning the response. +func getNoBody(urlStr string) (*Response, error) { + res, err := Get(urlStr) + if err != nil { + return nil, err + } + res.Body.Close() + return res, nil +} + +// A benchmark for profiling the client without the HTTP server code. +// The server code runs in a subprocess. +func BenchmarkClient(b *testing.B) { + b.ReportAllocs() + b.StopTimer() + defer afterTest(b) + + var data = []byte("Hello world.\n") + if server := os.Getenv("TEST_BENCH_SERVER"); server != "" { + // Server process mode. + port := os.Getenv("TEST_BENCH_SERVER_PORT") // can be set by user + if port == "" { + port = "0" + } + ln, err := net.Listen("tcp", "localhost:"+port) + if err != nil { + fmt.Fprintln(os.Stderr, err.Error()) + os.Exit(1) + } + fmt.Println(ln.Addr().String()) + HandleFunc("/", func(w ResponseWriter, r *Request) { + r.ParseForm() + if r.Form.Get("stop") != "" { + os.Exit(0) + } + w.Header().Set("Content-Type", "text/html; charset=utf-8") + w.Write(data) + }) + var srv Server + log.Fatal(srv.Serve(ln)) + } + + // Start server process. + ctx, cancel := context.WithCancel(context.Background()) + cmd := testenv.CommandContext(b, ctx, os.Args[0], "-test.run=XXXX", "-test.bench=BenchmarkClient$") + cmd.Env = append(cmd.Environ(), "TEST_BENCH_SERVER=yes") + cmd.Stderr = os.Stderr + stdout, err := cmd.StdoutPipe() + if err != nil { + b.Fatal(err) + } + if err := cmd.Start(); err != nil { + b.Fatalf("subprocess failed to start: %v", err) + } + + done := make(chan error, 1) + go func() { + done <- cmd.Wait() + close(done) + }() + defer func() { + cancel() + <-done + }() + + // Wait for the server in the child process to respond and tell us + // its listening address, once it's started listening: + bs := bufio.NewScanner(stdout) + if !bs.Scan() { + b.Fatalf("failed to read listening URL from child: %v", bs.Err()) + } + url := "http://" + strings.TrimSpace(bs.Text()) + "/" + if _, err := getNoBody(url); err != nil { + b.Fatalf("initial probe of child process failed: %v", err) + } + + // Do b.N requests to the server. + b.StartTimer() + for i := 0; i < b.N; i++ { + res, err := Get(url) + if err != nil { + b.Fatalf("Get: %v", err) + } + body, err := io.ReadAll(res.Body) + res.Body.Close() + if err != nil { + b.Fatalf("ReadAll: %v", err) + } + if !bytes.Equal(body, data) { + b.Fatalf("Got body: %q", body) + } + } + b.StopTimer() + + // Instruct server process to stop. + getNoBody(url + "?stop=yes") + if err := <-done; err != nil { + b.Fatalf("subprocess failed: %v", err) + } +} + +func BenchmarkServerFakeConnNoKeepAlive(b *testing.B) { + b.ReportAllocs() + req := reqBytes(`GET / HTTP/1.0 +Host: golang.org +Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 +User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_2) AppleWebKit/537.17 (KHTML, like Gecko) Chrome/24.0.1312.52 Safari/537.17 +Accept-Encoding: gzip,deflate,sdch +Accept-Language: en-US,en;q=0.8 +Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 +`) + res := []byte("Hello world!\n") + + conn := &testConn{ + // testConn.Close will not push into the channel + // if it's full. + closec: make(chan bool, 1), + } + handler := HandlerFunc(func(rw ResponseWriter, r *Request) { + rw.Header().Set("Content-Type", "text/html; charset=utf-8") + rw.Write(res) + }) + ln := new(oneConnListener) + for i := 0; i < b.N; i++ { + conn.readBuf.Reset() + conn.writeBuf.Reset() + conn.readBuf.Write(req) + ln.conn = conn + Serve(ln, handler) + <-conn.closec + } +} + +// repeatReader reads content count times, then EOFs. +type repeatReader struct { + content []byte + count int + off int +} + +func (r *repeatReader) Read(p []byte) (n int, err error) { + if r.count <= 0 { + return 0, io.EOF + } + n = copy(p, r.content[r.off:]) + r.off += n + if r.off == len(r.content) { + r.count-- + r.off = 0 + } + return +} + +func BenchmarkServerFakeConnWithKeepAlive(b *testing.B) { + b.ReportAllocs() + + req := reqBytes(`GET / HTTP/1.1 +Host: golang.org +Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 +User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_2) AppleWebKit/537.17 (KHTML, like Gecko) Chrome/24.0.1312.52 Safari/537.17 +Accept-Encoding: gzip,deflate,sdch +Accept-Language: en-US,en;q=0.8 +Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 +`) + res := []byte("Hello world!\n") + + conn := &rwTestConn{ + Reader: &repeatReader{content: req, count: b.N}, + Writer: io.Discard, + closec: make(chan bool, 1), + } + handled := 0 + handler := HandlerFunc(func(rw ResponseWriter, r *Request) { + handled++ + rw.Header().Set("Content-Type", "text/html; charset=utf-8") + rw.Write(res) + }) + ln := &oneConnListener{conn: conn} + go Serve(ln, handler) + <-conn.closec + if b.N != handled { + b.Errorf("b.N=%d but handled %d", b.N, handled) + } +} + +// same as above, but representing the most simple possible request +// and handler. Notably: the handler does not call rw.Header(). +func BenchmarkServerFakeConnWithKeepAliveLite(b *testing.B) { + b.ReportAllocs() + + req := reqBytes(`GET / HTTP/1.1 +Host: golang.org +`) + res := []byte("Hello world!\n") + + conn := &rwTestConn{ + Reader: &repeatReader{content: req, count: b.N}, + Writer: io.Discard, + closec: make(chan bool, 1), + } + handled := 0 + handler := HandlerFunc(func(rw ResponseWriter, r *Request) { + handled++ + rw.Write(res) + }) + ln := &oneConnListener{conn: conn} + go Serve(ln, handler) + <-conn.closec + if b.N != handled { + b.Errorf("b.N=%d but handled %d", b.N, handled) + } +} + +const someResponse = "<html>some response</html>" + +// A Response that's just no bigger than 2KB, the buffer-before-chunking threshold. +var response = bytes.Repeat([]byte(someResponse), 2<<10/len(someResponse)) + +// Both Content-Type and Content-Length set. Should be no buffering. +func BenchmarkServerHandlerTypeLen(b *testing.B) { + benchmarkHandler(b, HandlerFunc(func(w ResponseWriter, r *Request) { + w.Header().Set("Content-Type", "text/html") + w.Header().Set("Content-Length", strconv.Itoa(len(response))) + w.Write(response) + })) +} + +// A Content-Type is set, but no length. No sniffing, but will count the Content-Length. +func BenchmarkServerHandlerNoLen(b *testing.B) { + benchmarkHandler(b, HandlerFunc(func(w ResponseWriter, r *Request) { + w.Header().Set("Content-Type", "text/html") + w.Write(response) + })) +} + +// A Content-Length is set, but the Content-Type will be sniffed. +func BenchmarkServerHandlerNoType(b *testing.B) { + benchmarkHandler(b, HandlerFunc(func(w ResponseWriter, r *Request) { + w.Header().Set("Content-Length", strconv.Itoa(len(response))) + w.Write(response) + })) +} + +// Neither a Content-Type or Content-Length, so sniffed and counted. +func BenchmarkServerHandlerNoHeader(b *testing.B) { + benchmarkHandler(b, HandlerFunc(func(w ResponseWriter, r *Request) { + w.Write(response) + })) +} + +func benchmarkHandler(b *testing.B, h Handler) { + b.ReportAllocs() + req := reqBytes(`GET / HTTP/1.1 +Host: golang.org +`) + conn := &rwTestConn{ + Reader: &repeatReader{content: req, count: b.N}, + Writer: io.Discard, + closec: make(chan bool, 1), + } + handled := 0 + handler := HandlerFunc(func(rw ResponseWriter, r *Request) { + handled++ + h.ServeHTTP(rw, r) + }) + ln := &oneConnListener{conn: conn} + go Serve(ln, handler) + <-conn.closec + if b.N != handled { + b.Errorf("b.N=%d but handled %d", b.N, handled) + } +} + +func BenchmarkServerHijack(b *testing.B) { + b.ReportAllocs() + req := reqBytes(`GET / HTTP/1.1 +Host: golang.org +`) + h := HandlerFunc(func(w ResponseWriter, r *Request) { + conn, _, err := w.(Hijacker).Hijack() + if err != nil { + panic(err) + } + conn.Close() + }) + conn := &rwTestConn{ + Writer: io.Discard, + closec: make(chan bool, 1), + } + ln := &oneConnListener{conn: conn} + for i := 0; i < b.N; i++ { + conn.Reader = bytes.NewReader(req) + ln.conn = conn + Serve(ln, h) + <-conn.closec + } +} + +func BenchmarkCloseNotifier(b *testing.B) { run(b, benchmarkCloseNotifier, []testMode{http1Mode}) } +func benchmarkCloseNotifier(b *testing.B, mode testMode) { + b.ReportAllocs() + b.StopTimer() + sawClose := make(chan bool) + ts := newClientServerTest(b, mode, HandlerFunc(func(rw ResponseWriter, req *Request) { + <-rw.(CloseNotifier).CloseNotify() + sawClose <- true + })).ts + b.StartTimer() + for i := 0; i < b.N; i++ { + conn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + b.Fatalf("error dialing: %v", err) + } + _, err = fmt.Fprintf(conn, "GET / HTTP/1.1\r\nConnection: keep-alive\r\nHost: foo\r\n\r\n") + if err != nil { + b.Fatal(err) + } + conn.Close() + <-sawClose + } + b.StopTimer() +} + +// Verify this doesn't race (Issue 16505) +func TestConcurrentServerServe(t *testing.T) { + setParallel(t) + for i := 0; i < 100; i++ { + ln1 := &oneConnListener{conn: nil} + ln2 := &oneConnListener{conn: nil} + srv := Server{} + go func() { srv.Serve(ln1) }() + go func() { srv.Serve(ln2) }() + } +} + +func TestServerIdleTimeout(t *testing.T) { run(t, testServerIdleTimeout, []testMode{http1Mode}) } +func testServerIdleTimeout(t *testing.T, mode testMode) { + if testing.Short() { + t.Skip("skipping in short mode") + } + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + io.Copy(io.Discard, r.Body) + io.WriteString(w, r.RemoteAddr) + }), func(ts *httptest.Server) { + ts.Config.ReadHeaderTimeout = 1 * time.Second + ts.Config.IdleTimeout = 2 * time.Second + }).ts + c := ts.Client() + + get := func() string { + res, err := c.Get(ts.URL) + if err != nil { + t.Fatal(err) + } + defer res.Body.Close() + slurp, err := io.ReadAll(res.Body) + if err != nil { + t.Fatal(err) + } + return string(slurp) + } + + a1, a2 := get(), get() + if a1 != a2 { + t.Fatalf("did requests on different connections") + } + time.Sleep(3 * time.Second) + a3 := get() + if a2 == a3 { + t.Fatal("request three unexpectedly on same connection") + } + + // And test that ReadHeaderTimeout still works: + conn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatal(err) + } + defer conn.Close() + conn.Write([]byte("GET / HTTP/1.1\r\nHost: foo.com\r\n")) + time.Sleep(2 * time.Second) + if _, err := io.CopyN(io.Discard, conn, 1); err == nil { + t.Fatal("copy byte succeeded; want err") + } +} + +func get(t *testing.T, c *Client, url string) string { + res, err := c.Get(url) + if err != nil { + t.Fatal(err) + } + defer res.Body.Close() + slurp, err := io.ReadAll(res.Body) + if err != nil { + t.Fatal(err) + } + return string(slurp) +} + +// Tests that calls to Server.SetKeepAlivesEnabled(false) closes any +// currently-open connections. +func TestServerSetKeepAlivesEnabledClosesConns(t *testing.T) { + run(t, testServerSetKeepAlivesEnabledClosesConns, []testMode{http1Mode}) +} +func testServerSetKeepAlivesEnabledClosesConns(t *testing.T, mode testMode) { + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + io.WriteString(w, r.RemoteAddr) + })).ts + + c := ts.Client() + tr := c.Transport.(*Transport) + + get := func() string { return get(t, c, ts.URL) } + + a1, a2 := get(), get() + if a1 == a2 { + t.Logf("made two requests from a single conn %q (as expected)", a1) + } else { + t.Errorf("server reported requests from %q and %q; expected same connection", a1, a2) + } + + // The two requests should have used the same connection, + // and there should not have been a second connection that + // was created by racing dial against reuse. + // (The first get was completed when the second get started.) + if conns := tr.IdleConnStrsForTesting(); len(conns) != 1 { + t.Errorf("found %d idle conns (%q); want 1", len(conns), conns) + } + + // SetKeepAlivesEnabled should discard idle conns. + ts.Config.SetKeepAlivesEnabled(false) + + waitCondition(t, 10*time.Millisecond, func(d time.Duration) bool { + if conns := tr.IdleConnStrsForTesting(); len(conns) > 0 { + if d > 0 { + t.Logf("idle conns %v after SetKeepAlivesEnabled called = %q; waiting for empty", d, conns) + } + return false + } + return true + }) + + // If we make a third request it should use a new connection, but in general + // we have no way to verify that: the new connection could happen to reuse the + // exact same ports from the previous connection. +} + +func TestServerShutdown(t *testing.T) { run(t, testServerShutdown) } +func testServerShutdown(t *testing.T, mode testMode) { + var cst *clientServerTest + + var once sync.Once + statesRes := make(chan map[ConnState]int, 1) + shutdownRes := make(chan error, 1) + gotOnShutdown := make(chan struct{}) + handler := HandlerFunc(func(w ResponseWriter, r *Request) { + first := false + once.Do(func() { + statesRes <- cst.ts.Config.ExportAllConnsByState() + go func() { + shutdownRes <- cst.ts.Config.Shutdown(context.Background()) + }() + first = true + }) + + if first { + // Shutdown is graceful, so it should not interrupt this in-flight response + // but should reject new requests. (Since this request is still in flight, + // the server's port should not be reused for another server yet.) + <-gotOnShutdown + // TODO(#59038): The HTTP/2 server empirically does not always reject new + // requests. As a workaround, loop until we see a failure. + for !t.Failed() { + res, err := cst.c.Get(cst.ts.URL) + if err != nil { + break + } + out, _ := io.ReadAll(res.Body) + res.Body.Close() + if mode == http2Mode { + t.Logf("%v: unexpected success (%q). Listener should be closed before OnShutdown is called.", cst.ts.URL, out) + t.Logf("Retrying to work around https://go.dev/issue/59038.") + continue + } + t.Errorf("%v: unexpected success (%q). Listener should be closed before OnShutdown is called.", cst.ts.URL, out) + } + } + + io.WriteString(w, r.RemoteAddr) + }) + + cst = newClientServerTest(t, mode, handler, func(srv *httptest.Server) { + srv.Config.RegisterOnShutdown(func() { close(gotOnShutdown) }) + }) + + out := get(t, cst.c, cst.ts.URL) // calls t.Fail on failure + t.Logf("%v: %q", cst.ts.URL, out) + + if err := <-shutdownRes; err != nil { + t.Fatalf("Shutdown: %v", err) + } + <-gotOnShutdown // Will hang if RegisterOnShutdown is broken. + + if states := <-statesRes; states[StateActive] != 1 { + t.Errorf("connection in wrong state, %v", states) + } +} + +func TestServerShutdownStateNew(t *testing.T) { run(t, testServerShutdownStateNew) } +func testServerShutdownStateNew(t *testing.T, mode testMode) { + if testing.Short() { + t.Skip("test takes 5-6 seconds; skipping in short mode") + } + + var connAccepted sync.WaitGroup + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + // nothing. + }), func(ts *httptest.Server) { + ts.Config.ConnState = func(conn net.Conn, state ConnState) { + if state == StateNew { + connAccepted.Done() + } + } + }).ts + + // Start a connection but never write to it. + connAccepted.Add(1) + c, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatal(err) + } + defer c.Close() + + // Wait for the connection to be accepted by the server. Otherwise, if + // Shutdown happens to run first, the server will be closed when + // encountering the connection, in which case it will be rejected + // immediately. + connAccepted.Wait() + + shutdownRes := make(chan error, 1) + go func() { + shutdownRes <- ts.Config.Shutdown(context.Background()) + }() + readRes := make(chan error, 1) + go func() { + _, err := c.Read([]byte{0}) + readRes <- err + }() + + // TODO(#59037): This timeout is hard-coded in closeIdleConnections. + // It is undocumented, and some users may find it surprising. + // Either document it, or switch to a less surprising behavior. + const expectTimeout = 5 * time.Second + + t0 := time.Now() + select { + case got := <-shutdownRes: + d := time.Since(t0) + if got != nil { + t.Fatalf("shutdown error after %v: %v", d, err) + } + if d < expectTimeout/2 { + t.Errorf("shutdown too soon after %v", d) + } + case <-time.After(expectTimeout * 3 / 2): + t.Fatalf("timeout waiting for shutdown") + } + + // Wait for c.Read to unblock; should be already done at this point, + // or within a few milliseconds. + if err := <-readRes; err == nil { + t.Error("expected error from Read") + } +} + +// Issue 17878: tests that we can call Close twice. +func TestServerCloseDeadlock(t *testing.T) { + var s Server + s.Close() + s.Close() +} + +// Issue 17717: tests that Server.SetKeepAlivesEnabled is respected by +// both HTTP/1 and HTTP/2. +func TestServerKeepAlivesEnabled(t *testing.T) { run(t, testServerKeepAlivesEnabled, testNotParallel) } +func testServerKeepAlivesEnabled(t *testing.T, mode testMode) { + if mode == http2Mode { + restore := ExportSetH2GoawayTimeout(10 * time.Millisecond) + defer restore() + } + // Not parallel: messes with global variable. (http2goAwayTimeout) + cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {})) + defer cst.close() + srv := cst.ts.Config + srv.SetKeepAlivesEnabled(false) + for try := 0; try < 2; try++ { + waitCondition(t, 10*time.Millisecond, func(d time.Duration) bool { + if !srv.ExportAllConnsIdle() { + if d > 0 { + t.Logf("test server still has active conns after %v", d) + } + return false + } + return true + }) + conns := 0 + var info httptrace.GotConnInfo + ctx := httptrace.WithClientTrace(context.Background(), &httptrace.ClientTrace{ + GotConn: func(v httptrace.GotConnInfo) { + conns++ + info = v + }, + }) + req, err := NewRequestWithContext(ctx, "GET", cst.ts.URL, nil) + if err != nil { + t.Fatal(err) + } + res, err := cst.c.Do(req) + if err != nil { + t.Fatal(err) + } + res.Body.Close() + if conns != 1 { + t.Fatalf("request %v: got %v conns, want 1", try, conns) + } + if info.Reused || info.WasIdle { + t.Fatalf("request %v: Reused=%v (want false), WasIdle=%v (want false)", try, info.Reused, info.WasIdle) + } + } +} + +// Issue 18447: test that the Server's ReadTimeout is stopped while +// the server's doing its 1-byte background read between requests, +// waiting for the connection to maybe close. +func TestServerCancelsReadTimeoutWhenIdle(t *testing.T) { run(t, testServerCancelsReadTimeoutWhenIdle) } +func testServerCancelsReadTimeoutWhenIdle(t *testing.T, mode testMode) { + runTimeSensitiveTest(t, []time.Duration{ + 10 * time.Millisecond, + 50 * time.Millisecond, + 250 * time.Millisecond, + time.Second, + 2 * time.Second, + }, func(t *testing.T, timeout time.Duration) error { + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + select { + case <-time.After(2 * timeout): + fmt.Fprint(w, "ok") + case <-r.Context().Done(): + fmt.Fprint(w, r.Context().Err()) + } + }), func(ts *httptest.Server) { + ts.Config.ReadTimeout = timeout + }).ts + + c := ts.Client() + + res, err := c.Get(ts.URL) + if err != nil { + return fmt.Errorf("Get: %v", err) + } + slurp, err := io.ReadAll(res.Body) + res.Body.Close() + if err != nil { + return fmt.Errorf("Body ReadAll: %v", err) + } + if string(slurp) != "ok" { + return fmt.Errorf("got: %q, want ok", slurp) + } + return nil + }) +} + +// Issue 54784: test that the Server's ReadHeaderTimeout only starts once the +// beginning of a request has been received, rather than including time the +// connection spent idle. +func TestServerCancelsReadHeaderTimeoutWhenIdle(t *testing.T) { + run(t, testServerCancelsReadHeaderTimeoutWhenIdle, []testMode{http1Mode}) +} +func testServerCancelsReadHeaderTimeoutWhenIdle(t *testing.T, mode testMode) { + runTimeSensitiveTest(t, []time.Duration{ + 10 * time.Millisecond, + 50 * time.Millisecond, + 250 * time.Millisecond, + time.Second, + 2 * time.Second, + }, func(t *testing.T, timeout time.Duration) error { + ts := newClientServerTest(t, mode, serve(200), func(ts *httptest.Server) { + ts.Config.ReadHeaderTimeout = timeout + ts.Config.IdleTimeout = 0 // disable idle timeout + }).ts + + // rather than using an http.Client, create a single connection, so that + // we can ensure this connection is not closed. + conn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatalf("dial failed: %v", err) + } + br := bufio.NewReader(conn) + defer conn.Close() + + if _, err := conn.Write([]byte("GET / HTTP/1.1\r\nHost: e.com\r\n\r\n")); err != nil { + return fmt.Errorf("writing first request failed: %v", err) + } + + if _, err := ReadResponse(br, nil); err != nil { + return fmt.Errorf("first response (before timeout) failed: %v", err) + } + + // wait for longer than the server's ReadHeaderTimeout, and then send + // another request + time.Sleep(timeout * 3 / 2) + + if _, err := conn.Write([]byte("GET / HTTP/1.1\r\nHost: e.com\r\n\r\n")); err != nil { + return fmt.Errorf("writing second request failed: %v", err) + } + + if _, err := ReadResponse(br, nil); err != nil { + return fmt.Errorf("second response (after timeout) failed: %v", err) + } + + return nil + }) +} + +// runTimeSensitiveTest runs test with the provided durations until one passes. +// If they all fail, t.Fatal is called with the last one's duration and error value. +func runTimeSensitiveTest(t *testing.T, durations []time.Duration, test func(t *testing.T, d time.Duration) error) { + for i, d := range durations { + err := test(t, d) + if err == nil { + return + } + if i == len(durations)-1 { + t.Fatalf("failed with duration %v: %v", d, err) + } + } +} + +// Issue 18535: test that the Server doesn't try to do a background +// read if it's already done one. +func TestServerDuplicateBackgroundRead(t *testing.T) { + run(t, testServerDuplicateBackgroundRead, []testMode{http1Mode}) +} +func testServerDuplicateBackgroundRead(t *testing.T, mode testMode) { + if runtime.GOOS == "netbsd" && runtime.GOARCH == "arm" { + testenv.SkipFlaky(t, 24826) + } + + goroutines := 5 + requests := 2000 + if testing.Short() { + goroutines = 3 + requests = 100 + } + + hts := newClientServerTest(t, mode, HandlerFunc(NotFound)).ts + + reqBytes := []byte("GET / HTTP/1.1\r\nHost: e.com\r\n\r\n") + + var wg sync.WaitGroup + for i := 0; i < goroutines; i++ { + wg.Add(1) + go func() { + defer wg.Done() + cn, err := net.Dial("tcp", hts.Listener.Addr().String()) + if err != nil { + t.Error(err) + return + } + defer cn.Close() + + wg.Add(1) + go func() { + defer wg.Done() + io.Copy(io.Discard, cn) + }() + + for j := 0; j < requests; j++ { + if t.Failed() { + return + } + _, err := cn.Write(reqBytes) + if err != nil { + t.Error(err) + return + } + } + }() + } + wg.Wait() +} + +// Test that the bufio.Reader returned by Hijack includes any buffered +// byte (from the Server's backgroundRead) in its buffer. We want the +// Handler code to be able to tell that a byte is available via +// bufio.Reader.Buffered(), without resorting to Reading it +// (potentially blocking) to get at it. +func TestServerHijackGetsBackgroundByte(t *testing.T) { + run(t, testServerHijackGetsBackgroundByte, []testMode{http1Mode}) +} +func testServerHijackGetsBackgroundByte(t *testing.T, mode testMode) { + if runtime.GOOS == "plan9" { + t.Skip("skipping test; see https://golang.org/issue/18657") + } + done := make(chan struct{}) + inHandler := make(chan bool, 1) + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + defer close(done) + + // Tell the client to send more data after the GET request. + inHandler <- true + + conn, buf, err := w.(Hijacker).Hijack() + if err != nil { + t.Error(err) + return + } + defer conn.Close() + + peek, err := buf.Reader.Peek(3) + if string(peek) != "foo" || err != nil { + t.Errorf("Peek = %q, %v; want foo, nil", peek, err) + } + + select { + case <-r.Context().Done(): + t.Error("context unexpectedly canceled") + default: + } + })).ts + + cn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatal(err) + } + defer cn.Close() + if _, err := cn.Write([]byte("GET / HTTP/1.1\r\nHost: e.com\r\n\r\n")); err != nil { + t.Fatal(err) + } + <-inHandler + if _, err := cn.Write([]byte("foo")); err != nil { + t.Fatal(err) + } + + if err := cn.(*net.TCPConn).CloseWrite(); err != nil { + t.Fatal(err) + } + <-done +} + +// Like TestServerHijackGetsBackgroundByte above but sending a +// immediate 1MB of data to the server to fill up the server's 4KB +// buffer. +func TestServerHijackGetsBackgroundByte_big(t *testing.T) { + run(t, testServerHijackGetsBackgroundByte_big, []testMode{http1Mode}) +} +func testServerHijackGetsBackgroundByte_big(t *testing.T, mode testMode) { + if runtime.GOOS == "plan9" { + t.Skip("skipping test; see https://golang.org/issue/18657") + } + done := make(chan struct{}) + const size = 8 << 10 + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + defer close(done) + + conn, buf, err := w.(Hijacker).Hijack() + if err != nil { + t.Error(err) + return + } + defer conn.Close() + slurp, err := io.ReadAll(buf.Reader) + if err != nil { + t.Errorf("Copy: %v", err) + } + allX := true + for _, v := range slurp { + if v != 'x' { + allX = false + } + } + if len(slurp) != size { + t.Errorf("read %d; want %d", len(slurp), size) + } else if !allX { + t.Errorf("read %q; want %d 'x'", slurp, size) + } + })).ts + + cn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatal(err) + } + defer cn.Close() + if _, err := fmt.Fprintf(cn, "GET / HTTP/1.1\r\nHost: e.com\r\n\r\n%s", + strings.Repeat("x", size)); err != nil { + t.Fatal(err) + } + if err := cn.(*net.TCPConn).CloseWrite(); err != nil { + t.Fatal(err) + } + + <-done +} + +// Issue 18319: test that the Server validates the request method. +func TestServerValidatesMethod(t *testing.T) { + tests := []struct { + method string + want int + }{ + {"GET", 200}, + {"GE(T", 400}, + } + for _, tt := range tests { + conn := &testConn{closec: make(chan bool, 1)} + io.WriteString(&conn.readBuf, tt.method+" / HTTP/1.1\r\nHost: foo.example\r\n\r\n") + + ln := &oneConnListener{conn} + go Serve(ln, serve(200)) + <-conn.closec + res, err := ReadResponse(bufio.NewReader(&conn.writeBuf), nil) + if err != nil { + t.Errorf("For %s, ReadResponse: %v", tt.method, res) + continue + } + if res.StatusCode != tt.want { + t.Errorf("For %s, Status = %d; want %d", tt.method, res.StatusCode, tt.want) + } + } +} + +// Listener for TestServerListenNotComparableListener. +type eofListenerNotComparable []int + +func (eofListenerNotComparable) Accept() (net.Conn, error) { return nil, io.EOF } +func (eofListenerNotComparable) Addr() net.Addr { return nil } +func (eofListenerNotComparable) Close() error { return nil } + +// Issue 24812: don't crash on non-comparable Listener +func TestServerListenNotComparableListener(t *testing.T) { + var s Server + s.Serve(make(eofListenerNotComparable, 1)) // used to panic +} + +// countCloseListener is a Listener wrapper that counts the number of Close calls. +type countCloseListener struct { + net.Listener + closes int32 // atomic +} + +func (p *countCloseListener) Close() error { + var err error + if n := atomic.AddInt32(&p.closes, 1); n == 1 && p.Listener != nil { + err = p.Listener.Close() + } + return err +} + +// Issue 24803: don't call Listener.Close on Server.Shutdown. +func TestServerCloseListenerOnce(t *testing.T) { + setParallel(t) + defer afterTest(t) + + ln := newLocalListener(t) + defer ln.Close() + + cl := &countCloseListener{Listener: ln} + server := &Server{} + sdone := make(chan bool, 1) + + go func() { + server.Serve(cl) + sdone <- true + }() + time.Sleep(10 * time.Millisecond) + server.Shutdown(context.Background()) + ln.Close() + <-sdone + + nclose := atomic.LoadInt32(&cl.closes) + if nclose != 1 { + t.Errorf("Close calls = %v; want 1", nclose) + } +} + +// Issue 20239: don't block in Serve if Shutdown is called first. +func TestServerShutdownThenServe(t *testing.T) { + var srv Server + cl := &countCloseListener{Listener: nil} + srv.Shutdown(context.Background()) + got := srv.Serve(cl) + if got != ErrServerClosed { + t.Errorf("Serve err = %v; want ErrServerClosed", got) + } + nclose := atomic.LoadInt32(&cl.closes) + if nclose != 1 { + t.Errorf("Close calls = %v; want 1", nclose) + } +} + +// Issue 23351: document and test behavior of ServeMux with ports +func TestStripPortFromHost(t *testing.T) { + mux := NewServeMux() + + mux.HandleFunc("example.com/", func(w ResponseWriter, r *Request) { + fmt.Fprintf(w, "OK") + }) + mux.HandleFunc("example.com:9000/", func(w ResponseWriter, r *Request) { + fmt.Fprintf(w, "uh-oh!") + }) + + req := httptest.NewRequest("GET", "http://example.com:9000/", nil) + rw := httptest.NewRecorder() + + mux.ServeHTTP(rw, req) + + response := rw.Body.String() + if response != "OK" { + t.Errorf("Response gotten was %q", response) + } +} + +func TestServerContexts(t *testing.T) { run(t, testServerContexts) } +func testServerContexts(t *testing.T, mode testMode) { + type baseKey struct{} + type connKey struct{} + ch := make(chan context.Context, 1) + ts := newClientServerTest(t, mode, HandlerFunc(func(rw ResponseWriter, r *Request) { + ch <- r.Context() + }), func(ts *httptest.Server) { + ts.Config.BaseContext = func(ln net.Listener) context.Context { + if strings.Contains(reflect.TypeOf(ln).String(), "onceClose") { + t.Errorf("unexpected onceClose listener type %T", ln) + } + return context.WithValue(context.Background(), baseKey{}, "base") + } + ts.Config.ConnContext = func(ctx context.Context, c net.Conn) context.Context { + if got, want := ctx.Value(baseKey{}), "base"; got != want { + t.Errorf("in ConnContext, base context key = %#v; want %q", got, want) + } + return context.WithValue(ctx, connKey{}, "conn") + } + }).ts + res, err := ts.Client().Get(ts.URL) + if err != nil { + t.Fatal(err) + } + res.Body.Close() + ctx := <-ch + if got, want := ctx.Value(baseKey{}), "base"; got != want { + t.Errorf("base context key = %#v; want %q", got, want) + } + if got, want := ctx.Value(connKey{}), "conn"; got != want { + t.Errorf("conn context key = %#v; want %q", got, want) + } +} + +// Issue 35750: check ConnContext not modifying context for other connections +func TestConnContextNotModifyingAllContexts(t *testing.T) { + run(t, testConnContextNotModifyingAllContexts) +} +func testConnContextNotModifyingAllContexts(t *testing.T, mode testMode) { + type connKey struct{} + ts := newClientServerTest(t, mode, HandlerFunc(func(rw ResponseWriter, r *Request) { + rw.Header().Set("Connection", "close") + }), func(ts *httptest.Server) { + ts.Config.ConnContext = func(ctx context.Context, c net.Conn) context.Context { + if got := ctx.Value(connKey{}); got != nil { + t.Errorf("in ConnContext, unexpected context key = %#v", got) + } + return context.WithValue(ctx, connKey{}, "conn") + } + }).ts + + var res *Response + var err error + + res, err = ts.Client().Get(ts.URL) + if err != nil { + t.Fatal(err) + } + res.Body.Close() + + res, err = ts.Client().Get(ts.URL) + if err != nil { + t.Fatal(err) + } + res.Body.Close() +} + +// Issue 30710: ensure that as per the spec, a server responds +// with 501 Not Implemented for unsupported transfer-encodings. +func TestUnsupportedTransferEncodingsReturn501(t *testing.T) { + run(t, testUnsupportedTransferEncodingsReturn501, []testMode{http1Mode}) +} +func testUnsupportedTransferEncodingsReturn501(t *testing.T, mode testMode) { + cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + w.Write([]byte("Hello, World!")) + })).ts + + serverURL, err := url.Parse(cst.URL) + if err != nil { + t.Fatalf("Failed to parse server URL: %v", err) + } + + unsupportedTEs := []string{ + "fugazi", + "foo-bar", + "unknown", + `" chunked"`, + } + + for _, badTE := range unsupportedTEs { + http1ReqBody := fmt.Sprintf(""+ + "POST / HTTP/1.1\r\nConnection: close\r\n"+ + "Host: localhost\r\nTransfer-Encoding: %s\r\n\r\n", badTE) + + gotBody, err := fetchWireResponse(serverURL.Host, []byte(http1ReqBody)) + if err != nil { + t.Errorf("%q. unexpected error: %v", badTE, err) + continue + } + + wantBody := fmt.Sprintf("" + + "HTTP/1.1 501 Not Implemented\r\nContent-Type: text/plain; charset=utf-8\r\n" + + "Connection: close\r\n\r\nUnsupported transfer encoding") + + if string(gotBody) != wantBody { + t.Errorf("%q. body\ngot\n%q\nwant\n%q", badTE, gotBody, wantBody) + } + } +} + +// Issue 31753: don't sniff when Content-Encoding is set +func TestContentEncodingNoSniffing(t *testing.T) { run(t, testContentEncodingNoSniffing) } +func testContentEncodingNoSniffing(t *testing.T, mode testMode) { + type setting struct { + name string + body []byte + + // setting contentEncoding as an interface instead of a string + // directly, so as to differentiate between 3 states: + // unset, empty string "" and set string "foo/bar". + contentEncoding any + wantContentType string + } + + settings := []*setting{ + { + name: "gzip content-encoding, gzipped", // don't sniff. + contentEncoding: "application/gzip", + wantContentType: "", + body: func() []byte { + buf := new(bytes.Buffer) + gzw := gzip.NewWriter(buf) + gzw.Write([]byte("doctype html><p>Hello</p>")) + gzw.Close() + return buf.Bytes() + }(), + }, + { + name: "zlib content-encoding, zlibbed", // don't sniff. + contentEncoding: "application/zlib", + wantContentType: "", + body: func() []byte { + buf := new(bytes.Buffer) + zw := zlib.NewWriter(buf) + zw.Write([]byte("doctype html><p>Hello</p>")) + zw.Close() + return buf.Bytes() + }(), + }, + { + name: "no content-encoding", // must sniff. + wantContentType: "application/x-gzip", + body: func() []byte { + buf := new(bytes.Buffer) + gzw := gzip.NewWriter(buf) + gzw.Write([]byte("doctype html><p>Hello</p>")) + gzw.Close() + return buf.Bytes() + }(), + }, + { + name: "phony content-encoding", // don't sniff. + contentEncoding: "foo/bar", + body: []byte("doctype html><p>Hello</p>"), + }, + { + name: "empty but set content-encoding", + contentEncoding: "", + wantContentType: "audio/mpeg", + body: []byte("ID3"), + }, + } + + for _, tt := range settings { + t.Run(tt.name, func(t *testing.T) { + cst := newClientServerTest(t, mode, HandlerFunc(func(rw ResponseWriter, r *Request) { + if tt.contentEncoding != nil { + rw.Header().Set("Content-Encoding", tt.contentEncoding.(string)) + } + rw.Write(tt.body) + })) + + res, err := cst.c.Get(cst.ts.URL) + if err != nil { + t.Fatalf("Failed to fetch URL: %v", err) + } + defer res.Body.Close() + + if g, w := res.Header.Get("Content-Encoding"), tt.contentEncoding; g != w { + if w != nil { // The case where contentEncoding was set explicitly. + t.Errorf("Content-Encoding mismatch\n\tgot: %q\n\twant: %q", g, w) + } else if g != "" { // "" should be the equivalent when the contentEncoding is unset. + t.Errorf("Unexpected Content-Encoding %q", g) + } + } + + if g, w := res.Header.Get("Content-Type"), tt.wantContentType; g != w { + t.Errorf("Content-Type mismatch\n\tgot: %q\n\twant: %q", g, w) + } + }) + } +} + +// Issue 30803: ensure that TimeoutHandler logs spurious +// WriteHeader calls, for consistency with other Handlers. +func TestTimeoutHandlerSuperfluousLogs(t *testing.T) { + run(t, testTimeoutHandlerSuperfluousLogs, []testMode{http1Mode}) +} +func testTimeoutHandlerSuperfluousLogs(t *testing.T, mode testMode) { + if testing.Short() { + t.Skip("skipping in short mode") + } + + pc, curFile, _, _ := runtime.Caller(0) + curFileBaseName := filepath.Base(curFile) + testFuncName := runtime.FuncForPC(pc).Name() + + timeoutMsg := "timed out here!" + + tests := []struct { + name string + mustTimeout bool + wantResp string + }{ + { + name: "return before timeout", + wantResp: "HTTP/1.1 404 Not Found\r\nContent-Length: 0\r\n\r\n", + }, + { + name: "return after timeout", + mustTimeout: true, + wantResp: fmt.Sprintf("HTTP/1.1 503 Service Unavailable\r\nContent-Length: %d\r\n\r\n%s", + len(timeoutMsg), timeoutMsg), + }, + } + + for _, tt := range tests { + tt := tt + t.Run(tt.name, func(t *testing.T) { + exitHandler := make(chan bool, 1) + defer close(exitHandler) + lastLine := make(chan int, 1) + + sh := HandlerFunc(func(w ResponseWriter, r *Request) { + w.WriteHeader(404) + w.WriteHeader(404) + w.WriteHeader(404) + w.WriteHeader(404) + _, _, line, _ := runtime.Caller(0) + lastLine <- line + <-exitHandler + }) + + if !tt.mustTimeout { + exitHandler <- true + } + + logBuf := new(strings.Builder) + srvLog := log.New(logBuf, "", 0) + // When expecting to timeout, we'll keep the duration short. + dur := 20 * time.Millisecond + if !tt.mustTimeout { + // Otherwise, make it arbitrarily long to reduce the risk of flakes. + dur = 10 * time.Second + } + th := TimeoutHandler(sh, dur, timeoutMsg) + cst := newClientServerTest(t, mode, th, optWithServerLog(srvLog)) + defer cst.close() + + res, err := cst.c.Get(cst.ts.URL) + if err != nil { + t.Fatalf("Unexpected error: %v", err) + } + + // Deliberately removing the "Date" header since it is highly ephemeral + // and will cause failure if we try to match it exactly. + res.Header.Del("Date") + res.Header.Del("Content-Type") + + // Match the response. + blob, _ := httputil.DumpResponse(res, true) + if g, w := string(blob), tt.wantResp; g != w { + t.Errorf("Response mismatch\nGot\n%q\n\nWant\n%q", g, w) + } + + // Given 4 w.WriteHeader calls, only the first one is valid + // and the rest should be reported as the 3 spurious logs. + logEntries := strings.Split(strings.TrimSpace(logBuf.String()), "\n") + if g, w := len(logEntries), 3; g != w { + blob, _ := json.MarshalIndent(logEntries, "", " ") + t.Fatalf("Server logs count mismatch\ngot %d, want %d\n\nGot\n%s\n", g, w, blob) + } + + lastSpuriousLine := <-lastLine + firstSpuriousLine := lastSpuriousLine - 3 + // Now ensure that the regexes match exactly. + // "http: superfluous response.WriteHeader call from <fn>.func\d.\d (<curFile>:lastSpuriousLine-[1, 3]" + for i, logEntry := range logEntries { + wantLine := firstSpuriousLine + i + pat := fmt.Sprintf("^http: superfluous response.WriteHeader call from %s.func\\d+.\\d+ \\(%s:%d\\)$", + testFuncName, curFileBaseName, wantLine) + re := regexp.MustCompile(pat) + if !re.MatchString(logEntry) { + t.Errorf("Log entry mismatch\n\t%s\ndoes not match\n\t%s", logEntry, pat) + } + } + }) + } +} + +// fetchWireResponse is a helper for dialing to host, +// sending http1ReqBody as the payload and retrieving +// the response as it was sent on the wire. +func fetchWireResponse(host string, http1ReqBody []byte) ([]byte, error) { + conn, err := net.Dial("tcp", host) + if err != nil { + return nil, err + } + defer conn.Close() + + if _, err := conn.Write(http1ReqBody); err != nil { + return nil, err + } + return io.ReadAll(conn) +} + +func BenchmarkResponseStatusLine(b *testing.B) { + b.ReportAllocs() + b.RunParallel(func(pb *testing.PB) { + bw := bufio.NewWriter(io.Discard) + var buf3 [3]byte + for pb.Next() { + Export_writeStatusLine(bw, true, 200, buf3[:]) + } + }) +} + +func TestDisableKeepAliveUpgrade(t *testing.T) { + run(t, testDisableKeepAliveUpgrade, []testMode{http1Mode}) +} +func testDisableKeepAliveUpgrade(t *testing.T, mode testMode) { + if testing.Short() { + t.Skip("skipping in short mode") + } + + s := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + w.Header().Set("Connection", "Upgrade") + w.Header().Set("Upgrade", "someProto") + w.WriteHeader(StatusSwitchingProtocols) + c, buf, err := w.(Hijacker).Hijack() + if err != nil { + return + } + defer c.Close() + + // Copy from the *bufio.ReadWriter, which may contain buffered data. + // Copy to the net.Conn, to avoid buffering the output. + io.Copy(c, buf) + }), func(ts *httptest.Server) { + ts.Config.SetKeepAlivesEnabled(false) + }).ts + + cl := s.Client() + cl.Transport.(*Transport).DisableKeepAlives = true + + resp, err := cl.Get(s.URL) + if err != nil { + t.Fatalf("failed to perform request: %v", err) + } + defer resp.Body.Close() + + if resp.StatusCode != StatusSwitchingProtocols { + t.Fatalf("unexpected status code: %v", resp.StatusCode) + } + + rwc, ok := resp.Body.(io.ReadWriteCloser) + if !ok { + t.Fatalf("Response.Body is not an io.ReadWriteCloser: %T", resp.Body) + } + + _, err = rwc.Write([]byte("hello")) + if err != nil { + t.Fatalf("failed to write to body: %v", err) + } + + b := make([]byte, 5) + _, err = io.ReadFull(rwc, b) + if err != nil { + t.Fatalf("failed to read from body: %v", err) + } + + if string(b) != "hello" { + t.Fatalf("unexpected value read from body:\ngot: %q\nwant: %q", b, "hello") + } +} + +type tlogWriter struct{ t *testing.T } + +func (w tlogWriter) Write(p []byte) (int, error) { + w.t.Log(string(p)) + return len(p), nil +} + +func TestWriteHeaderSwitchingProtocols(t *testing.T) { + run(t, testWriteHeaderSwitchingProtocols, []testMode{http1Mode}) +} +func testWriteHeaderSwitchingProtocols(t *testing.T, mode testMode) { + const wantBody = "want" + const wantUpgrade = "someProto" + ts := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + w.Header().Set("Connection", "Upgrade") + w.Header().Set("Upgrade", wantUpgrade) + w.WriteHeader(StatusSwitchingProtocols) + NewResponseController(w).Flush() + + // Writing headers or the body after sending a 101 header should fail. + w.WriteHeader(200) + if _, err := w.Write([]byte("x")); err == nil { + t.Errorf("Write to body after 101 Switching Protocols unexpectedly succeeded") + } + + c, _, err := NewResponseController(w).Hijack() + if err != nil { + t.Errorf("Hijack: %v", err) + return + } + defer c.Close() + if _, err := c.Write([]byte(wantBody)); err != nil { + t.Errorf("Write to hijacked body: %v", err) + } + }), func(ts *httptest.Server) { + // Don't spam log with warning about superfluous WriteHeader call. + ts.Config.ErrorLog = log.New(tlogWriter{t}, "log: ", 0) + }).ts + + conn, err := net.Dial("tcp", ts.Listener.Addr().String()) + if err != nil { + t.Fatalf("net.Dial: %v", err) + } + _, err = conn.Write([]byte("GET / HTTP/1.1\r\nHost: foo\r\n\r\n")) + if err != nil { + t.Fatalf("conn.Write: %v", err) + } + defer conn.Close() + + r := bufio.NewReader(conn) + res, err := ReadResponse(r, &Request{Method: "GET"}) + if err != nil { + t.Fatal("ReadResponse error:", err) + } + if res.StatusCode != StatusSwitchingProtocols { + t.Errorf("Response StatusCode=%v, want 101", res.StatusCode) + } + if got := res.Header.Get("Upgrade"); got != wantUpgrade { + t.Errorf("Response Upgrade header = %q, want %q", got, wantUpgrade) + } + body, err := io.ReadAll(r) + if err != nil { + t.Error(err) + } + if string(body) != wantBody { + t.Errorf("Response body = %q, want %q", string(body), wantBody) + } +} + +func TestMuxRedirectRelative(t *testing.T) { + setParallel(t) + req, err := ReadRequest(bufio.NewReader(strings.NewReader("GET http://example.com HTTP/1.1\r\nHost: test\r\n\r\n"))) + if err != nil { + t.Errorf("%s", err) + } + mux := NewServeMux() + resp := httptest.NewRecorder() + mux.ServeHTTP(resp, req) + if got, want := resp.Header().Get("Location"), "/"; got != want { + t.Errorf("Location header expected %q; got %q", want, got) + } + if got, want := resp.Code, StatusMovedPermanently; got != want { + t.Errorf("Expected response code %d; got %d", want, got) + } +} + +// TestQuerySemicolon tests the behavior of semicolons in queries. See Issue 25192. +func TestQuerySemicolon(t *testing.T) { + t.Cleanup(func() { afterTest(t) }) + + tests := []struct { + query string + xNoSemicolons string + xWithSemicolons string + expectParseFormErr bool + }{ + {"?a=1;x=bad&x=good", "good", "bad", true}, + {"?a=1;b=bad&x=good", "good", "good", true}, + {"?a=1%3Bx=bad&x=good%3B", "good;", "good;", false}, + {"?a=1;x=good;x=bad", "", "good", true}, + } + + run(t, func(t *testing.T, mode testMode) { + for _, tt := range tests { + t.Run(tt.query+"/allow=false", func(t *testing.T) { + allowSemicolons := false + testQuerySemicolon(t, mode, tt.query, tt.xNoSemicolons, allowSemicolons, tt.expectParseFormErr) + }) + t.Run(tt.query+"/allow=true", func(t *testing.T) { + allowSemicolons, expectParseFormErr := true, false + testQuerySemicolon(t, mode, tt.query, tt.xWithSemicolons, allowSemicolons, expectParseFormErr) + }) + } + }) +} + +func testQuerySemicolon(t *testing.T, mode testMode, query string, wantX string, allowSemicolons, expectParseFormErr bool) { + writeBackX := func(w ResponseWriter, r *Request) { + x := r.URL.Query().Get("x") + if expectParseFormErr { + if err := r.ParseForm(); err == nil || !strings.Contains(err.Error(), "semicolon") { + t.Errorf("expected error mentioning semicolons from ParseForm, got %v", err) + } + } else { + if err := r.ParseForm(); err != nil { + t.Errorf("expected no error from ParseForm, got %v", err) + } + } + if got := r.FormValue("x"); x != got { + t.Errorf("got %q from FormValue, want %q", got, x) + } + fmt.Fprintf(w, "%s", x) + } + + h := Handler(HandlerFunc(writeBackX)) + if allowSemicolons { + h = AllowQuerySemicolons(h) + } + + logBuf := &strings.Builder{} + ts := newClientServerTest(t, mode, h, func(ts *httptest.Server) { + ts.Config.ErrorLog = log.New(logBuf, "", 0) + }).ts + + req, _ := NewRequest("GET", ts.URL+query, nil) + res, err := ts.Client().Do(req) + if err != nil { + t.Fatal(err) + } + slurp, _ := io.ReadAll(res.Body) + res.Body.Close() + if got, want := res.StatusCode, 200; got != want { + t.Errorf("Status = %d; want = %d", got, want) + } + if got, want := string(slurp), wantX; got != want { + t.Errorf("Body = %q; want = %q", got, want) + } +} + +func TestMaxBytesHandler(t *testing.T) { + setParallel(t) + defer afterTest(t) + + for _, maxSize := range []int64{100, 1_000, 1_000_000} { + for _, requestSize := range []int64{100, 1_000, 1_000_000} { + t.Run(fmt.Sprintf("max size %d request size %d", maxSize, requestSize), + func(t *testing.T) { + run(t, func(t *testing.T, mode testMode) { + testMaxBytesHandler(t, mode, maxSize, requestSize) + }) + }) + } + } +} + +func testMaxBytesHandler(t *testing.T, mode testMode, maxSize, requestSize int64) { + var ( + handlerN int64 + handlerErr error + ) + echo := HandlerFunc(func(w ResponseWriter, r *Request) { + var buf bytes.Buffer + handlerN, handlerErr = io.Copy(&buf, r.Body) + io.Copy(w, &buf) + }) + + ts := newClientServerTest(t, mode, MaxBytesHandler(echo, maxSize)).ts + defer ts.Close() + + c := ts.Client() + + body := strings.Repeat("a", int(requestSize)) + var wg sync.WaitGroup + defer wg.Wait() + getBody := func() (io.ReadCloser, error) { + wg.Add(1) + body := &wgReadCloser{ + Reader: strings.NewReader(body), + wg: &wg, + } + return body, nil + } + reqBody, _ := getBody() + req, err := NewRequest("POST", ts.URL, reqBody) + if err != nil { + reqBody.Close() + t.Fatal(err) + } + req.ContentLength = int64(len(body)) + req.GetBody = getBody + req.Header.Set("Content-Type", "text/plain") + + var buf strings.Builder + res, err := c.Do(req) + if err != nil { + t.Errorf("unexpected connection error: %v", err) + } else { + _, err = io.Copy(&buf, res.Body) + res.Body.Close() + if err != nil { + t.Errorf("unexpected read error: %v", err) + } + } + if handlerN > maxSize { + t.Errorf("expected max request body %d; got %d", maxSize, handlerN) + } + if requestSize > maxSize && handlerErr == nil { + t.Error("expected error on handler side; got nil") + } + if requestSize <= maxSize { + if handlerErr != nil { + t.Errorf("%d expected nil error on handler side; got %v", requestSize, handlerErr) + } + if handlerN != requestSize { + t.Errorf("expected request of size %d; got %d", requestSize, handlerN) + } + } + if buf.Len() != int(handlerN) { + t.Errorf("expected echo of size %d; got %d", handlerN, buf.Len()) + } +} + +func TestEarlyHints(t *testing.T) { + ht := newHandlerTest(HandlerFunc(func(w ResponseWriter, r *Request) { + h := w.Header() + h.Add("Link", "</style.css>; rel=preload; as=style") + h.Add("Link", "</script.js>; rel=preload; as=script") + w.WriteHeader(StatusEarlyHints) + + h.Add("Link", "</foo.js>; rel=preload; as=script") + w.WriteHeader(StatusEarlyHints) + + w.Write([]byte("stuff")) + })) + + got := ht.rawResponse("GET / HTTP/1.1\nHost: golang.org") + expected := "HTTP/1.1 103 Early Hints\r\nLink: </style.css>; rel=preload; as=style\r\nLink: </script.js>; rel=preload; as=script\r\n\r\nHTTP/1.1 103 Early Hints\r\nLink: </style.css>; rel=preload; as=style\r\nLink: </script.js>; rel=preload; as=script\r\nLink: </foo.js>; rel=preload; as=script\r\n\r\nHTTP/1.1 200 OK\r\nLink: </style.css>; rel=preload; as=style\r\nLink: </script.js>; rel=preload; as=script\r\nLink: </foo.js>; rel=preload; as=script\r\nDate: " // dynamic content expected + if !strings.Contains(got, expected) { + t.Errorf("unexpected response; got %q; should start by %q", got, expected) + } +} +func TestProcessing(t *testing.T) { + ht := newHandlerTest(HandlerFunc(func(w ResponseWriter, r *Request) { + w.WriteHeader(StatusProcessing) + w.Write([]byte("stuff")) + })) + + got := ht.rawResponse("GET / HTTP/1.1\nHost: golang.org") + expected := "HTTP/1.1 102 Processing\r\n\r\nHTTP/1.1 200 OK\r\nDate: " // dynamic content expected + if !strings.Contains(got, expected) { + t.Errorf("unexpected response; got %q; should start by %q", got, expected) + } +} + +func TestParseFormCleanup(t *testing.T) { run(t, testParseFormCleanup) } +func testParseFormCleanup(t *testing.T, mode testMode) { + if mode == http2Mode { + t.Skip("https://go.dev/issue/20253") + } + + const maxMemory = 1024 + const key = "file" + + if runtime.GOOS == "windows" { + // Windows sometimes refuses to remove a file that was just closed. + t.Skip("https://go.dev/issue/25965") + } + + cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + r.ParseMultipartForm(maxMemory) + f, _, err := r.FormFile(key) + if err != nil { + t.Errorf("r.FormFile(%q) = %v", key, err) + return + } + of, ok := f.(*os.File) + if !ok { + t.Errorf("r.FormFile(%q) returned type %T, want *os.File", key, f) + return + } + w.Write([]byte(of.Name())) + })) + + fBuf := new(bytes.Buffer) + mw := multipart.NewWriter(fBuf) + mf, err := mw.CreateFormFile(key, "myfile.txt") + if err != nil { + t.Fatal(err) + } + if _, err := mf.Write(bytes.Repeat([]byte("A"), maxMemory*2)); err != nil { + t.Fatal(err) + } + if err := mw.Close(); err != nil { + t.Fatal(err) + } + req, err := NewRequest("POST", cst.ts.URL, fBuf) + if err != nil { + t.Fatal(err) + } + req.Header.Set("Content-Type", mw.FormDataContentType()) + res, err := cst.c.Do(req) + if err != nil { + t.Fatal(err) + } + defer res.Body.Close() + fname, err := io.ReadAll(res.Body) + if err != nil { + t.Fatal(err) + } + cst.close() + if _, err := os.Stat(string(fname)); !errors.Is(err, os.ErrNotExist) { + t.Errorf("file %q exists after HTTP handler returned", string(fname)) + } +} + +func TestHeadBody(t *testing.T) { + const identityMode = false + const chunkedMode = true + run(t, func(t *testing.T, mode testMode) { + t.Run("identity", func(t *testing.T) { testHeadBody(t, mode, identityMode, "HEAD") }) + t.Run("chunked", func(t *testing.T) { testHeadBody(t, mode, chunkedMode, "HEAD") }) + }) +} + +func TestGetBody(t *testing.T) { + const identityMode = false + const chunkedMode = true + run(t, func(t *testing.T, mode testMode) { + t.Run("identity", func(t *testing.T) { testHeadBody(t, mode, identityMode, "GET") }) + t.Run("chunked", func(t *testing.T) { testHeadBody(t, mode, chunkedMode, "GET") }) + }) +} + +func testHeadBody(t *testing.T, mode testMode, chunked bool, method string) { + cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + b, err := io.ReadAll(r.Body) + if err != nil { + t.Errorf("server reading body: %v", err) + return + } + w.Header().Set("X-Request-Body", string(b)) + w.Header().Set("Content-Length", "0") + })) + defer cst.close() + for _, reqBody := range []string{ + "", + "", + "request_body", + "", + } { + var bodyReader io.Reader + if reqBody != "" { + bodyReader = strings.NewReader(reqBody) + if chunked { + bodyReader = bufio.NewReader(bodyReader) + } + } + req, err := NewRequest(method, cst.ts.URL, bodyReader) + if err != nil { + t.Fatal(err) + } + res, err := cst.c.Do(req) + if err != nil { + t.Fatal(err) + } + res.Body.Close() + if got, want := res.StatusCode, 200; got != want { + t.Errorf("%v request with %d-byte body: StatusCode = %v, want %v", method, len(reqBody), got, want) + } + if got, want := res.Header.Get("X-Request-Body"), reqBody; got != want { + t.Errorf("%v request with %d-byte body: handler read body %q, want %q", method, len(reqBody), got, want) + } + } +} + +// TestDisableContentLength verifies that the Content-Length is set by default +// or disabled when the header is set to nil. +func TestDisableContentLength(t *testing.T) { run(t, testDisableContentLength) } +func testDisableContentLength(t *testing.T, mode testMode) { + if mode == http2Mode { + t.Skip("skipping until h2_bundle.go is updated; see https://go-review.googlesource.com/c/net/+/471535") + } + + noCL := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + w.Header()["Content-Length"] = nil // disable the default Content-Length response + fmt.Fprintf(w, "OK") + })) + + res, err := noCL.c.Get(noCL.ts.URL) + if err != nil { + t.Fatal(err) + } + if got, haveCL := res.Header["Content-Length"]; haveCL { + t.Errorf("Unexpected Content-Length: %q", got) + } + if err := res.Body.Close(); err != nil { + t.Fatal(err) + } + + withCL := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) { + fmt.Fprintf(w, "OK") + })) + + res, err = withCL.c.Get(withCL.ts.URL) + if err != nil { + t.Fatal(err) + } + if got := res.Header.Get("Content-Length"); got != "2" { + t.Errorf("Content-Length: %q; want 2", got) + } + if err := res.Body.Close(); err != nil { + t.Fatal(err) + } +} |