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// 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"
"crypto/tls"
"errors"
"fmt"
"io"
"io/ioutil"
"log"
"math/rand"
"net"
. "net/http"
"net/http/httptest"
"net/http/httputil"
"net/url"
"os"
"os/exec"
"reflect"
"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 {
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) {
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.Replace(strings.TrimSpace(req), "\n", "\r\n", -1) + "\r\n\r\n")
}
type handlerTest struct {
handler Handler
}
func newHandlerTest(h Handler) handlerTest {
return handlerTest{h}
}
func (ht handlerTest) rawResponse(req string) string {
reqb := reqBytes(req)
var output bytes.Buffer
conn := &rwTestConn{
Reader: bytes.NewReader(reqb),
Writer: &output,
closec: make(chan bool, 1),
}
ln := &oneConnListener{conn: conn}
go Serve(ln, ht.handler)
<-conn.closec
return output.String()
}
func TestConsumingBodyOnNextConn(t *testing.T) {
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"},
{"someHost.com/someDir/", "someHost.com/someDir"},
}
var vtests = []struct {
url string
expected string
}{
{"http://localhost/someDir/apage", "someDir"},
{"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://someHost.com/someDir", "/someDir/"},
}
func TestHostHandlers(t *testing.T) {
defer afterTest(t)
mux := NewServeMux()
for _, h := range handlers {
mux.Handle(h.pattern, stringHandler(h.msg))
}
ts := httptest.NewServer(mux)
defer ts.Close()
conn, err := net.Dial("tcp", ts.Listener.Addr().String())
if err != nil {
t.Fatal(err)
}
defer conn.Close()
cc := httputil.NewClientConn(conn, nil)
for _, vt := range vtests {
var r *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", "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) {
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)
}
}
}
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) {
mux := NewServeMux()
for _, e := range serveMuxRegister {
mux.Handle(e.pattern, e.h)
}
for _, tt := range serveMuxTests2 {
tries := 1
turl := tt.url
for tries > 0 {
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 http://golang.org/issue/900
func TestMuxRedirectLeadingSlashes(t *testing.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
}
}
}
func TestServerTimeouts(t *testing.T) {
if runtime.GOOS == "plan9" {
t.Skip("skipping test; see http://golang.org/issue/7237")
}
defer afterTest(t)
reqNum := 0
ts := httptest.NewUnstartedServer(HandlerFunc(func(res ResponseWriter, req *Request) {
reqNum++
fmt.Fprintf(res, "req=%d", reqNum)
}))
ts.Config.ReadTimeout = 250 * time.Millisecond
ts.Config.WriteTimeout = 250 * time.Millisecond
ts.Start()
defer ts.Close()
// Hit the HTTP server successfully.
tr := &Transport{DisableKeepAlives: true} // they interfere with this test
defer tr.CloseIdleConnections()
c := &Client{Transport: tr}
r, err := c.Get(ts.URL)
if err != nil {
t.Fatalf("http Get #1: %v", err)
}
got, _ := ioutil.ReadAll(r.Body)
expected := "req=1"
if string(got) != expected {
t.Errorf("Unexpected response for request #1; got %q; expected %q",
string(got), expected)
}
// Slow client that should timeout.
t1 := time.Now()
conn, err := net.Dial("tcp", ts.Listener.Addr().String())
if err != nil {
t.Fatalf("Dial: %v", err)
}
buf := make([]byte, 1)
n, err := conn.Read(buf)
latency := time.Since(t1)
if n != 0 || err != io.EOF {
t.Errorf("Read = %v, %v, wanted %v, %v", n, err, 0, io.EOF)
}
if latency < 200*time.Millisecond /* fudge from 250 ms above */ {
t.Errorf("got EOF after %s, want >= %s", latency, 200*time.Millisecond)
}
// 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 = Get(ts.URL)
if err != nil {
t.Fatalf("http Get #2: %v", err)
}
got, _ = ioutil.ReadAll(r.Body)
expected = "req=2"
if string(got) != expected {
t.Errorf("Get #2 got %q, want %q", string(got), expected)
}
if !testing.Short() {
conn, err := net.Dial("tcp", ts.Listener.Addr().String())
if err != nil {
t.Fatalf("Dial: %v", err)
}
defer conn.Close()
go io.Copy(ioutil.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 {
t.Fatalf("on write %d: %v", i, err)
}
time.Sleep(ts.Config.ReadTimeout / 2)
}
}
}
// 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) {
if runtime.GOOS == "plan9" {
t.Skip("skipping test; see http://golang.org/issue/7237")
}
defer afterTest(t)
var conn net.Conn
var afterTimeoutErrc = make(chan error, 1)
ts := httptest.NewUnstartedServer(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
}
conn.SetWriteDeadline(time.Now().Add(-30 * time.Second))
_, err = w.Write(buf)
afterTimeoutErrc <- err
}))
ts.Listener = trackLastConnListener{ts.Listener, &conn}
ts.Start()
defer ts.Close()
tr := &Transport{DisableKeepAlives: false}
defer tr.CloseIdleConnections()
c := &Client{Transport: tr}
errc := make(chan error)
go func() {
res, err := c.Get(ts.URL)
if err != nil {
errc <- err
return
}
_, err = io.Copy(ioutil.Discard, res.Body)
errc <- err
}()
select {
case err := <-errc:
if err == nil {
t.Errorf("expected an error from Get request")
}
case <-time.After(5 * time.Second):
t.Fatal("timeout waiting for Get error")
}
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
last *net.Conn // destination
}
func (l trackLastConnListener) Accept() (c net.Conn, err error) {
c, err = l.Listener.Accept()
*l.last = c
return
}
// TestIdentityResponse verifies that a handler can unset
func TestIdentityResponse(t *testing.T) {
defer afterTest(t)
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 := httptest.NewServer(handler)
defer ts.Close()
// Note: this relies on the assumption (which is true) that
// Get sends HTTP/1.1 or greater requests. Otherwise the
// server wouldn't have the choice to send back chunked
// responses.
for _, te := range []string{"", "identity"} {
url := ts.URL + "/?te=" + te
res, err := 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 := Get(url)
if err != nil {
t.Fatalf("error with Get of %s: %v", url, err)
}
res.Body.Close()
// Verify that the connection is closed when the declared Content-Length
// is larger than what the handler wrote.
conn, err := net.Dial("tcp", ts.Listener.Addr().String())
if err != nil {
t.Fatalf("error dialing: %v", err)
}
_, err = conn.Write([]byte("GET /?underwrite=1 HTTP/1.1\r\nHost: foo\r\n\r\n"))
if err != nil {
t.Fatalf("error writing: %v", err)
}
// The ReadAll will hang for a failing test, so use a Timer to
// fail explicitly.
goTimeout(t, 2*time.Second, func() {
got, _ := ioutil.ReadAll(conn)
expectedSuffix := "\r\n\r\ntoo short"
if !strings.HasSuffix(string(got), expectedSuffix) {
t.Errorf("Expected output to end with %q; got response body %q",
expectedSuffix, string(got))
}
})
}
func testTCPConnectionCloses(t *testing.T, req string, h Handler) {
defer afterTest(t)
s := httptest.NewServer(h)
defer s.Close()
conn, err := net.Dial("tcp", s.Listener.Addr().String())
if err != nil {
t.Fatal("dial error:", err)
}
defer conn.Close()
_, err = fmt.Fprint(conn, req)
if err != nil {
t.Fatal("print error:", err)
}
r := bufio.NewReader(conn)
res, err := ReadResponse(r, &Request{Method: "GET"})
if err != nil {
t.Fatal("ReadResponse error:", err)
}
didReadAll := make(chan bool, 1)
go func() {
select {
case <-time.After(5 * time.Second):
t.Error("body not closed after 5s")
return
case <-didReadAll:
}
}()
_, err = ioutil.ReadAll(r)
if err != nil {
t.Fatal("read error:", err)
}
didReadAll <- true
if !res.Close {
t.Errorf("Response.Close = false; want true")
}
}
// 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\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\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 TestSetsRemoteAddr(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
fmt.Fprintf(w, "%s", r.RemoteAddr)
}))
defer ts.Close()
res, err := Get(ts.URL)
if err != nil {
t.Fatalf("Get error: %v", err)
}
body, err := ioutil.ReadAll(res.Body)
if err != nil {
t.Fatalf("ReadAll error: %v", err)
}
ip := string(body)
if !strings.HasPrefix(ip, "127.0.0.1:") && !strings.HasPrefix(ip, "[::1]:") {
t.Fatalf("Expected local addr; got %q", ip)
}
}
func TestChunkedResponseHeaders(t *testing.T) {
defer afterTest(t)
log.SetOutput(ioutil.Discard) // is noisy otherwise
defer log.SetOutput(os.Stderr)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Length", "intentional gibberish") // we check that this is deleted
w.(Flusher).Flush()
fmt.Fprintf(w, "I am a chunked response.")
}))
defer ts.Close()
res, err := Get(ts.URL)
if err != nil {
t.Fatalf("Get error: %v", err)
}
defer res.Body.Close()
if g, e := res.ContentLength, int64(-1); g != e {
t.Errorf("expected ContentLength of %d; got %d", e, g)
}
if g, e := res.TransferEncoding, []string{"chunked"}; !reflect.DeepEqual(g, e) {
t.Errorf("expected TransferEncoding of %v; got %v", e, g)
}
if _, haveCL := res.Header["Content-Length"]; haveCL {
t.Errorf("Unexpected Content-Length")
}
}
func TestIdentityResponseHeaders(t *testing.T) {
defer afterTest(t)
log.SetOutput(ioutil.Discard) // is noisy otherwise
defer log.SetOutput(os.Stderr)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
w.Header().Set("Transfer-Encoding", "identity")
w.(Flusher).Flush()
fmt.Fprintf(w, "I am an identity response.")
}))
defer ts.Close()
res, err := Get(ts.URL)
if err != nil {
t.Fatalf("Get error: %v", err)
}
defer res.Body.Close()
if g, e := res.TransferEncoding, []string(nil); !reflect.DeepEqual(g, e) {
t.Errorf("expected TransferEncoding of %v; got %v", e, g)
}
if _, haveCL := res.Header["Content-Length"]; haveCL {
t.Errorf("Unexpected Content-Length")
}
if !res.Close {
t.Errorf("expected Connection: close; got %v", res.Close)
}
}
// Test304Responses verifies that 304s don't declare that they're
// chunking in their response headers and aren't allowed to produce
// output.
func Test304Responses(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
w.WriteHeader(StatusNotModified)
_, err := w.Write([]byte("illegal body"))
if err != ErrBodyNotAllowed {
t.Errorf("on Write, expected ErrBodyNotAllowed, got %v", err)
}
}))
defer ts.Close()
res, err := Get(ts.URL)
if err != nil {
t.Error(err)
}
if len(res.TransferEncoding) > 0 {
t.Errorf("expected no TransferEncoding; got %v", res.TransferEncoding)
}
body, err := ioutil.ReadAll(res.Body)
if err != nil {
t.Error(err)
}
if len(body) > 0 {
t.Errorf("got unexpected body %q", string(body))
}
}
// TestHeadResponses verifies that all MIME type sniffing and Content-Length
// counting of GET requests also happens on HEAD requests.
func TestHeadResponses(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(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)
}
}))
defer ts.Close()
res, err := Head(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 := ioutil.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) {
if runtime.GOOS == "plan9" {
t.Skip("skipping test; see http://golang.org/issue/7237")
}
defer afterTest(t)
ts := httptest.NewUnstartedServer(HandlerFunc(func(w ResponseWriter, r *Request) {}))
errc := make(chanWriter, 10) // but only expecting 1
ts.Config.ReadTimeout = 250 * time.Millisecond
ts.Config.ErrorLog = log.New(errc, "", 0)
ts.StartTLS()
defer ts.Close()
conn, err := net.Dial("tcp", ts.Listener.Addr().String())
if err != nil {
t.Fatalf("Dial: %v", err)
}
defer conn.Close()
goTimeout(t, 10*time.Second, func() {
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)
}
})
select {
case v := <-errc:
if !strings.Contains(v, "timeout") && !strings.Contains(v, "TLS handshake") {
t.Errorf("expected a TLS handshake timeout error; got %q", v)
}
case <-time.After(5 * time.Second):
t.Errorf("timeout waiting for logged error")
}
}
func TestTLSServer(t *testing.T) {
defer afterTest(t)
ts := httptest.NewTLSServer(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")
}
}
}))
ts.Config.ErrorLog = log.New(ioutil.Discard, "", 0)
defer ts.Close()
// 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()
goTimeout(t, 10*time.Second, func() {
if !strings.HasPrefix(ts.URL, "https://") {
t.Errorf("expected test TLS server to start with https://, got %q", ts.URL)
return
}
noVerifyTransport := &Transport{
TLSClientConfig: &tls.Config{
InsecureSkipVerify: true,
},
}
client := &Client{Transport: noVerifyTransport}
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")
}
})
}
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) {
defer afterTest(t)
ts := httptest.NewServer(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") {
ioutil.ReadAll(r.Body)
w.Write([]byte("Hi"))
} else {
w.WriteHeader(StatusUnauthorized)
}
}))
defer ts.Close()
runTest := func(test serverExpectTest) {
conn, err := net.Dial("tcp", ts.Listener.Addr().String())
if err != nil {
t.Fatalf("Dial: %v", err)
}
defer conn.Close()
// 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"
go func() {
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,
ioutil.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) {
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)
ls := &oneConnListener{conn}
go Serve(ls, HandlerFunc(func(rw ResponseWriter, req *Request) {
defer close(done)
if conn.readBuf.Len() < len(body)/2 {
t.Errorf("on request, read buffer length is %d; expected about 100 KB", conn.readBuf.Len())
}
rw.WriteHeader(200)
rw.(Flusher).Flush()
if g, e := conn.readBuf.Len(), 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) {
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)
}
}
func TestTimeoutHandler(t *testing.T) {
defer afterTest(t)
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
})
timeout := make(chan time.Time, 1) // write to this to force timeouts
ts := httptest.NewServer(NewTestTimeoutHandler(sayHi, timeout))
defer ts.Close()
// Succeed without timing out:
sendHi <- true
res, err := Get(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, _ := ioutil.ReadAll(res.Body)
if g, e := string(body), "hi"; g != e {
t.Errorf("got body %q; expected %q", g, e)
}
if g := <-writeErrors; g != nil {
t.Errorf("got unexpected Write error on first request: %v", g)
}
// Times out:
timeout <- time.Time{}
res, err = Get(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, _ = ioutil.ReadAll(res.Body)
if !strings.Contains(string(body), "<title>Timeout</title>") {
t.Errorf("expected timeout body; got %q", string(body))
}
// Now make the previously-timed out handler speak again,
// which verifies the panic is handled:
sendHi <- true
if g, e := <-writeErrors, ErrHandlerTimeout; g != e {
t.Errorf("expected Write error of %v; got %v", e, g)
}
}
// See issues 8209 and 8414.
func TestTimeoutHandlerRace(t *testing.T) {
defer afterTest(t)
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 := httptest.NewServer(TimeoutHandler(delayHi, 20*time.Millisecond, ""))
defer ts.Close()
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 := Get(fmt.Sprintf("%s/%d", ts.URL, rand.Intn(50)))
if err == nil {
io.Copy(ioutil.Discard, res.Body)
res.Body.Close()
}
}()
}
wg.Wait()
}
// See issues 8209 and 8414.
func TestTimeoutHandlerRaceHeader(t *testing.T) {
defer afterTest(t)
delay204 := HandlerFunc(func(w ResponseWriter, r *Request) {
w.WriteHeader(204)
})
ts := httptest.NewServer(TimeoutHandler(delay204, time.Nanosecond, ""))
defer ts.Close()
var wg sync.WaitGroup
gate := make(chan bool, 50)
n := 500
if testing.Short() {
n = 10
}
for i := 0; i < n; i++ {
gate <- true
wg.Add(1)
go func() {
defer wg.Done()
defer func() { <-gate }()
res, err := Get(ts.URL)
if err != nil {
t.Error(err)
return
}
defer res.Body.Close()
io.Copy(ioutil.Discard, res.Body)
}()
}
wg.Wait()
}
// Verifies we don't path.Clean() on the wrong parts in redirects.
func TestRedirectMunging(t *testing.T) {
req, _ := NewRequest("GET", "http://example.com/", nil)
resp := httptest.NewRecorder()
Redirect(resp, req, "/foo?next=http://bar.com/", 302)
if g, e := resp.Header().Get("Location"), "/foo?next=http://bar.com/"; g != e {
t.Errorf("Location header was %q; want %q", g, e)
}
resp = httptest.NewRecorder()
Redirect(resp, req, "http://localhost:8080/_ah/login?continue=http://localhost:8080/", 302)
if g, e := resp.Header().Get("Location"), "http://localhost:8080/_ah/login?continue=http://localhost:8080/"; g != e {
t.Errorf("Location header was %q; want %q", g, e)
}
}
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)
}
}
// 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) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(rw ResponseWriter, r *Request) {
all, err := ioutil.ReadAll(r.Body)
if err != nil {
t.Fatalf("handler ReadAll: %v", err)
}
if len(all) != 0 {
t.Errorf("handler got %d bytes; expected 0", len(all))
}
rw.Header().Set("Content-Length", "0")
}))
defer ts.Close()
req, err := NewRequest("POST", ts.URL, strings.NewReader(""))
if err != nil {
t.Fatal(err)
}
req.ContentLength = 0
var resp [5]*Response
for i := range resp {
resp[i], err = DefaultClient.Do(req)
if err != nil {
t.Fatalf("client post #%d: %v", i, err)
}
}
for i := range resp {
all, err := ioutil.ReadAll(resp[i].Body)
if err != nil {
t.Fatalf("req #%d: client ReadAll: %v", i, err)
}
if len(all) != 0 {
t.Errorf("req #%d: client got %d bytes; expected 0", i, len(all))
}
}
}
func TestHandlerPanicNil(t *testing.T) {
testHandlerPanic(t, false, nil)
}
func TestHandlerPanic(t *testing.T) {
testHandlerPanic(t, false, "intentional death for testing")
}
func TestHandlerPanicWithHijack(t *testing.T) {
testHandlerPanic(t, true, "intentional death for testing")
}
func testHandlerPanic(t *testing.T, withHijack bool, panicValue interface{}) {
defer afterTest(t)
// Unlike the other tests that set the log output to ioutil.Discard
// to quiet the output, this test uses a pipe. The pipe serves three
// purposes:
//
// 1) The log.Print from the http server (generated by the caught
// panic) will go to the pipe instead of stderr, making the
// output quiet.
//
// 2) We read from the pipe to verify that the handler
// actually caught the panic and logged something.
//
// 3) The blocking Read call prevents this TestHandlerPanic
// function from exiting before the HTTP server handler
// finishes crashing. If this text function exited too
// early (and its defer log.SetOutput(os.Stderr) ran),
// then the crash output could spill into the next test.
pr, pw := io.Pipe()
log.SetOutput(pw)
defer log.SetOutput(os.Stderr)
defer pw.Close()
ts := httptest.NewServer(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)
}))
defer ts.Close()
// Do a blocking read on the log output pipe so its logging
// doesn't bleed into the next test. But wait only 5 seconds
// for it.
done := make(chan bool, 1)
go func() {
buf := make([]byte, 4<<10)
_, err := pr.Read(buf)
pr.Close()
if err != nil && err != io.EOF {
t.Error(err)
}
done <- true
}()
_, err := Get(ts.URL)
if err == nil {
t.Logf("expected an error")
}
if panicValue == nil {
return
}
select {
case <-done:
return
case <-time.After(5 * time.Second):
t.Fatal("expected server handler to log an error")
}
}
func TestNoDate(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
w.Header()["Date"] = nil
}))
defer ts.Close()
res, err := Get(ts.URL)
if err != nil {
t.Fatal(err)
}
_, present := res.Header["Date"]
if present {
t.Fatalf("Expected no Date header; got %v", res.Header["Date"])
}
}
func TestStripPrefix(t *testing.T) {
defer afterTest(t)
h := HandlerFunc(func(w ResponseWriter, r *Request) {
w.Header().Set("X-Path", r.URL.Path)
})
ts := httptest.NewServer(StripPrefix("/foo", h))
defer ts.Close()
res, err := Get(ts.URL + "/foo/bar")
if err != nil {
t.Fatal(err)
}
if g, e := res.Header.Get("X-Path"), "/bar"; g != e {
t.Errorf("test 1: got %s, want %s", g, e)
}
res.Body.Close()
res, err = Get(ts.URL + "/bar")
if err != nil {
t.Fatal(err)
}
if g, e := res.StatusCode, 404; g != e {
t.Errorf("test 2: got status %v, want %v", g, e)
}
res.Body.Close()
}
func TestRequestLimit(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
t.Fatalf("didn't expect to get request in Handler")
}))
defer ts.Close()
req, _ := NewRequest("GET", 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 := DefaultClient.Do(req)
if err != nil {
// Some HTTP clients may fail on this undefined behavior (server replying and
// closing the connection while the request is still being written), but
// we do support it (at least currently), so we expect a response below.
t.Fatalf("Do: %v", err)
}
defer res.Body.Close()
if res.StatusCode != 413 {
t.Fatalf("expected 413 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) {
defer afterTest(t)
const limit = 1 << 20
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
r.Body = MaxBytesReader(w, r.Body, limit)
n, err := io.Copy(ioutil.Discard, r.Body)
if err == nil {
t.Errorf("expected error from io.Copy")
}
if n != limit {
t.Errorf("io.Copy = %d, want %d", n, limit)
}
}))
defer ts.Close()
nWritten := new(int64)
req, _ := NewRequest("POST", ts.URL, io.LimitReader(countReader{neverEnding('a'), nWritten}, limit*200))
// Send the POST, but don't care it succeeds or not. The
// remote side is going to reply and then close the TCP
// connection, and HTTP doesn't really define if that's
// allowed or not. Some HTTP clients will get the response
// and some (like ours, currently) will complain that the
// request write failed, without reading the response.
//
// But that's okay, since what we're really testing is that
// the remote side hung up on us before we wrote too much.
_, _ = DefaultClient.Do(req)
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) {
if runtime.GOOS == "plan9" {
t.Skip("skipping test; see http://golang.org/issue/7237")
}
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {}))
defer ts.Close()
conn, err := net.Dial("tcp", ts.Listener.Addr().String())
if err != nil {
t.Fatalf("Dial: %v", err)
}
err = conn.(*net.TCPConn).CloseWrite()
if err != nil {
t.Fatalf("Dial: %v", err)
}
donec := make(chan bool)
go func() {
defer close(donec)
bs, err := ioutil.ReadAll(conn)
if err != nil {
t.Fatalf("ReadAll: %v", err)
}
got := string(bs)
if got != "" {
t.Errorf("read %q from server; want nothing", got)
}
}()
select {
case <-donec:
case <-time.After(10 * time.Second):
t.Fatalf("timeout")
}
}
// 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\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 http://golang.org/issue/3595
func TestServerGracefulClose(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
Error(w, "bye", StatusUnauthorized)
}))
defer ts.Close()
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) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
if r.Method != "get" {
t.Errorf(`Got method %q; want "get"`, r.Method)
}
}))
defer ts.Close()
req, _ := NewRequest("get", ts.URL, nil)
res, err := DefaultClient.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) {
ts := httptest.NewServer(HandlerFunc(func(rw ResponseWriter, req *Request) {}))
defer ts.Close()
for _, version := range []string{"HTTP/1.0", "HTTP/1.1"} {
conn, err := net.Dial("tcp", ts.Listener.Addr().String())
if err != nil {
t.Fatalf("error dialing: %v", err)
}
_, err = fmt.Fprintf(conn, "GET / %v\r\nConnection: keep-alive\r\nHost: foo\r\n\r\n", version)
if err != nil {
t.Fatalf("error writing: %v", err)
}
req, _ := 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) {
defer afterTest(t)
gotReq := make(chan bool, 1)
sawClose := make(chan bool, 1)
ts := httptest.NewServer(HandlerFunc(func(rw ResponseWriter, req *Request) {
gotReq <- true
cc := rw.(CloseNotifier).CloseNotify()
<-cc
sawClose <- true
}))
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.Fatal(err)
}
<-diec
conn.Close()
}()
For:
for {
select {
case <-gotReq:
diec <- true
case <-sawClose:
break For
case <-time.After(5 * time.Second):
t.Fatal("timeout")
}
}
ts.Close()
}
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
}
}
func TestOptions(t *testing.T) {
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 := httptest.NewServer(mux)
defer ts.Close()
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)
}
}
// 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(output string) error
}{
{
name: "write without Header",
handler: func(rw ResponseWriter, r *Request) {
rw.Write([]byte("hello world"))
},
check: func(got 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-length")
}
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 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 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 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 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-length")
}
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 string) error {
if !strings.Contains(got, "Content-Type: text/html") {
return errors.New("wrong content-length; 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 string) error {
if !strings.Contains(got, "Content-Type: some/type") {
return errors.New("wrong content-length; want html")
}
return nil
},
},
{
name: "empty handler",
handler: func(rw ResponseWriter, r *Request) {
},
check: func(got string) error {
if !strings.Contains(got, "Content-Type: text/plain") {
return errors.New("wrong content-length; want text/plain")
}
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 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 string) error {
if !strings.Contains(got, "404") {
return errors.New("wrong status")
}
if strings.Contains(got, "Some-Header") {
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")
if err := tc.check(got); err != nil {
t.Errorf("%s: %v\nGot response:\n%s", tc.name, err, got)
}
}
}
// goTimeout runs f, failing t if f takes more than ns to complete.
func goTimeout(t *testing.T, d time.Duration, f func()) {
ch := make(chan bool, 2)
timer := time.AfterFunc(d, func() {
t.Errorf("Timeout expired after %v", d)
ch <- true
})
defer timer.Stop()
go func() {
defer func() { ch <- true }()
f()
}()
<-ch
}
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) {
log.SetOutput(ioutil.Discard) // is noisy otherwise
defer log.SetOutput(os.Stderr)
ln := &errorListener{[]error{
&net.OpError{
Op: "accept",
Err: syscall.EMFILE,
}}}
err := Serve(ln, HandlerFunc(HandlerFunc(func(ResponseWriter, *Request) {})))
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 bytes.Buffer
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
}
// http://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) {
defer afterTest(t)
mux := NewServeMux()
mux.Handle("/", HandlerFunc(func(resp ResponseWriter, req *Request) {}))
ts := httptest.NewServer(mux)
defer ts.Close()
// 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) {
defer afterTest(t)
pr, pw := io.Pipe()
const size = 3 << 20
ts := httptest.NewServer(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(ioutil.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
}))
defer ts.Close()
req, err := NewRequest("POST", ts.URL, io.LimitReader(neverEnding('a'), size))
if err != nil {
t.Fatal(err)
}
res, err := DefaultClient.Do(req)
if err != nil {
t.Fatal(err)
}
all, err := ioutil.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, StatusContinue} {
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",
"GET /header HTTP/1.1",
"GET /more HTTP/1.1",
} {
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")
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) {
defer afterTest(t)
const bodySize = 1 << 20
unblockBackend := make(chan bool)
backend := httptest.NewServer(HandlerFunc(func(rw ResponseWriter, req *Request) {
io.CopyN(rw, req.Body, bodySize/2)
<-unblockBackend
}))
defer backend.Close()
backendRespc := make(chan *Response, 1)
proxy := httptest.NewServer(HandlerFunc(func(rw ResponseWriter, req *Request) {
if req.RequestURI == "/foo" {
rw.Write([]byte("bar"))
return
}
req2, _ := NewRequest("POST", backend.URL, req.Body)
req2.ContentLength = bodySize
bresp, err := DefaultClient.Do(req2)
if err != nil {
t.Errorf("Proxy outbound request: %v", err)
return
}
_, err = io.CopyN(ioutil.Discard, bresp.Body, bodySize/4)
if err != nil {
t.Errorf("Proxy copy error: %v", err)
return
}
backendRespc <- bresp // to close later
// Try to cause a race: Both the DefaultTransport and the proxy handler's Server
// will try to read/close req.Body (aka req2.Body)
DefaultTransport.(*Transport).CancelRequest(req2)
rw.Write([]byte("OK"))
}))
defer proxy.Close()
req, _ := NewRequest("POST", proxy.URL, io.LimitReader(neverEnding('a'), bodySize))
res, err := DefaultClient.Do(req)
if err != nil {
t.Fatalf("Original request: %v", err)
}
// Cleanup, so we don't leak goroutines.
res.Body.Close()
close(unblockBackend)
(<-backendRespc).Body.Close()
}
// Test that a hanging Request.Body.Read from another goroutine can't
// cause the Handler goroutine's Request.Body.Close to block.
func TestRequestBodyCloseDoesntBlock(t *testing.T) {
t.Skipf("Skipping known issue; see golang.org/issue/7121")
if testing.Short() {
t.Skip("skipping in -short mode")
}
defer afterTest(t)
readErrCh := make(chan error, 1)
errCh := make(chan error, 2)
server := httptest.NewServer(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)
}))
defer server.Close()
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)
case <-time.After(5 * time.Second):
t.Error("timeout")
}
}
// test that ResponseWriter implements io.stringWriter.
func TestResponseWriterWriteString(t *testing.T) {
okc := make(chan bool, 1)
ht := newHandlerTest(HandlerFunc(func(w ResponseWriter, r *Request) {
type stringWriter interface {
WriteString(s string) (n int, err error)
}
_, ok := w.(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) {
defer afterTest(t)
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")
},
}
ts := httptest.NewUnstartedServer(HandlerFunc(func(w ResponseWriter, r *Request) {
handler[r.URL.Path](w, r)
}))
defer ts.Close()
var mu sync.Mutex // guard stateLog and connID
var stateLog = map[int][]ConnState{}
var connID = map[net.Conn]int{}
ts.Config.ErrorLog = log.New(ioutil.Discard, "", 0)
ts.Config.ConnState = func(c net.Conn, state ConnState) {
if c == nil {
t.Errorf("nil conn seen in state %s", state)
return
}
mu.Lock()
defer mu.Unlock()
id, ok := connID[c]
if !ok {
id = len(connID) + 1
connID[c] = id
}
stateLog[id] = append(stateLog[id], state)
}
ts.Start()
mustGet(t, ts.URL+"/")
mustGet(t, ts.URL+"/close")
mustGet(t, ts.URL+"/")
mustGet(t, ts.URL+"/", "Connection", "close")
mustGet(t, ts.URL+"/hijack")
mustGet(t, ts.URL+"/hijack-panic")
// New->Closed
{
c, err := net.Dial("tcp", ts.Listener.Addr().String())
if err != nil {
t.Fatal(err)
}
c.Close()
}
// New->Active->Closed
{
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.Close()
}
// New->Idle->Closed
{
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(ioutil.Discard, res.Body); err != nil {
t.Fatal(err)
}
c.Close()
}
want := map[int][]ConnState{
1: {StateNew, StateActive, StateIdle, StateActive, StateClosed},
2: {StateNew, StateActive, StateIdle, StateActive, StateClosed},
3: {StateNew, StateActive, StateHijacked},
4: {StateNew, StateActive, StateHijacked},
5: {StateNew, StateClosed},
6: {StateNew, StateActive, StateClosed},
7: {StateNew, StateActive, StateIdle, StateClosed},
}
logString := func(m map[int][]ConnState) string {
var b bytes.Buffer
for id, l := range m {
fmt.Fprintf(&b, "Conn %d: ", id)
for _, s := range l {
fmt.Fprintf(&b, "%s ", s)
}
b.WriteString("\n")
}
return b.String()
}
for i := 0; i < 5; i++ {
time.Sleep(time.Duration(i) * 50 * time.Millisecond)
mu.Lock()
match := reflect.DeepEqual(stateLog, want)
mu.Unlock()
if match {
return
}
}
mu.Lock()
t.Errorf("Unexpected events.\nGot log: %s\n Want: %s\n", logString(stateLog), logString(want))
mu.Unlock()
}
func mustGet(t *testing.T, url string, headers ...string) {
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 := DefaultClient.Do(req)
if err != nil {
t.Errorf("Error fetching %s: %v", url, err)
return
}
_, err = ioutil.ReadAll(res.Body)
defer res.Body.Close()
if err != nil {
t.Errorf("Error reading %s: %v", url, err)
}
}
func TestServerKeepAlivesEnabled(t *testing.T) {
defer afterTest(t)
ts := httptest.NewUnstartedServer(HandlerFunc(func(w ResponseWriter, r *Request) {}))
ts.Config.SetKeepAlivesEnabled(false)
ts.Start()
defer ts.Close()
res, err := 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) {
defer afterTest(t)
var n int32
ts := httptest.NewServer(HandlerFunc(func(rw ResponseWriter, req *Request) {
atomic.AddInt32(&n, 1)
}))
defer ts.Close()
var wg sync.WaitGroup
const reqs = 20
for i := 0; i < reqs; i++ {
wg.Add(1)
go func() {
defer wg.Done()
res, err := Get(ts.URL)
if err != nil {
t.Error(err)
return
}
defer res.Body.Close()
_, err = io.Copy(ioutil.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: ioutil.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) {
var srv Server
var testConn closeWriteTestConn
c, err := ExportServerNewConn(&srv, &testConn)
if err != nil {
t.Fatal(err)
}
ExportCloseWriteAndWait(c)
if !testConn.didCloseWrite {
t.Error("didn't see CloseWrite call")
}
}
// This verifies that a handler can Flush and then Hijack.
//
// An 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) {
defer afterTest(t)
ts := httptest.NewServer(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)
}
}))
defer ts.Close()
res, err := Get(ts.URL)
if err != nil {
t.Fatal(err)
}
defer res.Body.Close()
all, err := ioutil.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) {
if testing.Short() {
t.Skip("skipping in -short mode")
}
defer afterTest(t)
const numReq = 3
addrc := make(chan string, numReq)
ts := httptest.NewUnstartedServer(HandlerFunc(func(w ResponseWriter, r *Request) {
addrc <- r.RemoteAddr
time.Sleep(500 * time.Millisecond)
w.(Flusher).Flush()
}))
ts.Config.WriteTimeout = 250 * time.Millisecond
ts.Start()
defer ts.Close()
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
}
}()
timeout := time.NewTimer(numReq * 2 * time.Second) // 4x overkill
defer timeout.Stop()
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++
}
case <-timeout.C:
t.Fatal("timeout waiting for requests to complete")
}
}
}
func BenchmarkClientServer(b *testing.B) {
b.ReportAllocs()
b.StopTimer()
ts := httptest.NewServer(HandlerFunc(func(rw ResponseWriter, r *Request) {
fmt.Fprintf(rw, "Hello world.\n")
}))
defer ts.Close()
b.StartTimer()
for i := 0; i < b.N; i++ {
res, err := Get(ts.URL)
if err != nil {
b.Fatal("Get:", err)
}
all, err := ioutil.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 BenchmarkClientServerParallel4(b *testing.B) {
benchmarkClientServerParallel(b, 4, false)
}
func BenchmarkClientServerParallel64(b *testing.B) {
benchmarkClientServerParallel(b, 64, false)
}
func BenchmarkClientServerParallelTLS4(b *testing.B) {
benchmarkClientServerParallel(b, 4, true)
}
func BenchmarkClientServerParallelTLS64(b *testing.B) {
benchmarkClientServerParallel(b, 64, true)
}
func benchmarkClientServerParallel(b *testing.B, parallelism int, useTLS bool) {
b.ReportAllocs()
ts := httptest.NewUnstartedServer(HandlerFunc(func(rw ResponseWriter, r *Request) {
fmt.Fprintf(rw, "Hello world.\n")
}))
if useTLS {
ts.StartTLS()
} else {
ts.Start()
}
defer ts.Close()
b.ResetTimer()
b.SetParallelism(parallelism)
b.RunParallel(func(pb *testing.PB) {
noVerifyTransport := &Transport{
TLSClientConfig: &tls.Config{
InsecureSkipVerify: true,
},
}
defer noVerifyTransport.CloseIdleConnections()
client := &Client{Transport: noVerifyTransport}
for pb.Next() {
res, err := client.Get(ts.URL)
if err != nil {
b.Logf("Get: %v", err)
continue
}
all, err := ioutil.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 := ioutil.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$")
cmd.Env = append([]string{
fmt.Sprintf("TEST_BENCH_CLIENT_N=%d", b.N),
fmt.Sprintf("TEST_BENCH_SERVER_URL=%s", ts.URL),
}, os.Environ()...)
out, err := cmd.CombinedOutput()
if err != nil {
b.Errorf("Test failure: %v, with output: %s", err, out)
}
}
// getNoBody wraps Get but closes any Response.Body before returning the response.
func getNoBody(urlStr string) (*Response, error) {
res, err := Get(urlStr)
if err != nil {
return nil, err
}
res.Body.Close()
return res, nil
}
// A benchmark for profiling the client without the HTTP server code.
// The server code runs in a subprocess.
func BenchmarkClient(b *testing.B) {
b.ReportAllocs()
b.StopTimer()
defer afterTest(b)
port := os.Getenv("TEST_BENCH_SERVER_PORT") // can be set by user
if port == "" {
port = "39207"
}
var data = []byte("Hello world.\n")
if server := os.Getenv("TEST_BENCH_SERVER"); server != "" {
// Server process mode.
HandleFunc("/", func(w ResponseWriter, r *Request) {
r.ParseForm()
if r.Form.Get("stop") != "" {
os.Exit(0)
}
w.Header().Set("Content-Type", "text/html; charset=utf-8")
w.Write(data)
})
log.Fatal(ListenAndServe("localhost:"+port, nil))
}
// Start server process.
cmd := exec.Command(os.Args[0], "-test.run=XXXX", "-test.bench=BenchmarkClient$")
cmd.Env = append(os.Environ(), "TEST_BENCH_SERVER=yes")
if err := cmd.Start(); err != nil {
b.Fatalf("subprocess failed to start: %v", err)
}
defer cmd.Process.Kill()
done := make(chan error)
go func() {
done <- cmd.Wait()
}()
// Wait for the server process to respond.
url := "http://localhost:" + port + "/"
for i := 0; i < 100; i++ {
time.Sleep(50 * time.Millisecond)
if _, err := getNoBody(url); err == nil {
break
}
if i == 99 {
b.Fatalf("subprocess does not respond")
}
}
// 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 := ioutil.ReadAll(res.Body)
res.Body.Close()
if err != nil {
b.Fatalf("ReadAll: %v", err)
}
if bytes.Compare(body, data) != 0 {
b.Fatalf("Got body: %q", body)
}
}
b.StopTimer()
// Instruct server process to stop.
getNoBody(url + "?stop=yes")
select {
case err := <-done:
if err != nil {
b.Fatalf("subprocess failed: %v", err)
}
case <-time.After(5 * time.Second):
b.Fatalf("subprocess did not stop")
}
}
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: ioutil.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: ioutil.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: ioutil.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: ioutil.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
}
}