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go / go / 8f6884393d3d9026f3398d1e96c480a0368cc139 / . / src / net / http / transport_test.go
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// Copyright 2011 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.
// Tests for transport.go.
//
// More tests are in clientserver_test.go (for things testing both client & server for both
// HTTP/1 and HTTP/2). This
package http_test
import (
"bufio"
"bytes"
"compress/gzip"
"context"
"crypto/rand"
"crypto/tls"
"crypto/x509"
"encoding/binary"
"errors"
"fmt"
"go/token"
"internal/nettrace"
"io"
"log"
mrand "math/rand"
"net"
. "net/http"
"net/http/httptest"
"net/http/httptrace"
"net/http/httputil"
"net/http/internal/testcert"
"net/textproto"
"net/url"
"os"
"reflect"
"runtime"
"strconv"
"strings"
"sync"
"sync/atomic"
"testing"
"testing/iotest"
"time"
"golang.org/x/net/http/httpguts"
)
// TODO: test 5 pipelined requests with responses: 1) OK, 2) OK, Connection: Close
// and then verify that the final 2 responses get errors back.
// hostPortHandler writes back the client's "host:port".
var hostPortHandler = HandlerFunc(func(w ResponseWriter, r *Request) {
if r.FormValue("close") == "true" {
w.Header().Set("Connection", "close")
}
w.Header().Set("X-Saw-Close", fmt.Sprint(r.Close))
w.Write([]byte(r.RemoteAddr))
// Include the address of the net.Conn in addition to the RemoteAddr,
// in case kernels reuse source ports quickly (see Issue 52450)
if c, ok := ResponseWriterConnForTesting(w); ok {
fmt.Fprintf(w, ", %T %p", c, c)
}
})
// testCloseConn is a net.Conn tracked by a testConnSet.
type testCloseConn struct {
net.Conn
set *testConnSet
}
func (c *testCloseConn) Close() error {
c.set.remove(c)
return c.Conn.Close()
}
// testConnSet tracks a set of TCP connections and whether they've
// been closed.
type testConnSet struct {
t *testing.T
mu sync.Mutex // guards closed and list
closed map[net.Conn]bool
list []net.Conn // in order created
}
func (tcs *testConnSet) insert(c net.Conn) {
tcs.mu.Lock()
defer tcs.mu.Unlock()
tcs.closed[c] = false
tcs.list = append(tcs.list, c)
}
func (tcs *testConnSet) remove(c net.Conn) {
tcs.mu.Lock()
defer tcs.mu.Unlock()
tcs.closed[c] = true
}
// some tests use this to manage raw tcp connections for later inspection
func makeTestDial(t *testing.T) (*testConnSet, func(n, addr string) (net.Conn, error)) {
connSet := &testConnSet{
t: t,
closed: make(map[net.Conn]bool),
}
dial := func(n, addr string) (net.Conn, error) {
c, err := net.Dial(n, addr)
if err != nil {
return nil, err
}
tc := &testCloseConn{c, connSet}
connSet.insert(tc)
return tc, nil
}
return connSet, dial
}
func (tcs *testConnSet) check(t *testing.T) {
tcs.mu.Lock()
defer tcs.mu.Unlock()
for i := 4; i >= 0; i-- {
for i, c := range tcs.list {
if tcs.closed[c] {
continue
}
if i != 0 {
tcs.mu.Unlock()
time.Sleep(50 * time.Millisecond)
tcs.mu.Lock()
continue
}
t.Errorf("TCP connection #%d, %p (of %d total) was not closed", i+1, c, len(tcs.list))
}
}
}
func TestReuseRequest(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
w.Write([]byte("{}"))
}))
defer ts.Close()
c := ts.Client()
req, _ := NewRequest("GET", ts.URL, nil)
res, err := c.Do(req)
if err != nil {
t.Fatal(err)
}
err = res.Body.Close()
if err != nil {
t.Fatal(err)
}
res, err = c.Do(req)
if err != nil {
t.Fatal(err)
}
err = res.Body.Close()
if err != nil {
t.Fatal(err)
}
}
// Two subsequent requests and verify their response is the same.
// The response from the server is our own IP:port
func TestTransportKeepAlives(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(hostPortHandler)
defer ts.Close()
c := ts.Client()
for _, disableKeepAlive := range []bool{false, true} {
c.Transport.(*Transport).DisableKeepAlives = disableKeepAlive
fetch := func(n int) string {
res, err := c.Get(ts.URL)
if err != nil {
t.Fatalf("error in disableKeepAlive=%v, req #%d, GET: %v", disableKeepAlive, n, err)
}
body, err := io.ReadAll(res.Body)
if err != nil {
t.Fatalf("error in disableKeepAlive=%v, req #%d, ReadAll: %v", disableKeepAlive, n, err)
}
return string(body)
}
body1 := fetch(1)
body2 := fetch(2)
bodiesDiffer := body1 != body2
if bodiesDiffer != disableKeepAlive {
t.Errorf("error in disableKeepAlive=%v. unexpected bodiesDiffer=%v; body1=%q; body2=%q",
disableKeepAlive, bodiesDiffer, body1, body2)
}
}
}
func TestTransportConnectionCloseOnResponse(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(hostPortHandler)
defer ts.Close()
connSet, testDial := makeTestDial(t)
c := ts.Client()
tr := c.Transport.(*Transport)
tr.Dial = testDial
for _, connectionClose := range []bool{false, true} {
fetch := func(n int) string {
req := new(Request)
var err error
req.URL, err = url.Parse(ts.URL + fmt.Sprintf("/?close=%v", connectionClose))
if err != nil {
t.Fatalf("URL parse error: %v", err)
}
req.Method = "GET"
req.Proto = "HTTP/1.1"
req.ProtoMajor = 1
req.ProtoMinor = 1
res, err := c.Do(req)
if err != nil {
t.Fatalf("error in connectionClose=%v, req #%d, Do: %v", connectionClose, n, err)
}
defer res.Body.Close()
body, err := io.ReadAll(res.Body)
if err != nil {
t.Fatalf("error in connectionClose=%v, req #%d, ReadAll: %v", connectionClose, n, err)
}
return string(body)
}
body1 := fetch(1)
body2 := fetch(2)
bodiesDiffer := body1 != body2
if bodiesDiffer != connectionClose {
t.Errorf("error in connectionClose=%v. unexpected bodiesDiffer=%v; body1=%q; body2=%q",
connectionClose, bodiesDiffer, body1, body2)
}
tr.CloseIdleConnections()
}
connSet.check(t)
}
// TestTransportConnectionCloseOnRequest tests that the Transport's doesn't reuse
// an underlying TCP connection after making an http.Request with Request.Close set.
//
// It tests the behavior by making an HTTP request to a server which
// describes the source source connection it got (remote port number +
// address of its net.Conn).
func TestTransportConnectionCloseOnRequest(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(hostPortHandler)
defer ts.Close()
connSet, testDial := makeTestDial(t)
c := ts.Client()
tr := c.Transport.(*Transport)
tr.Dial = testDial
for _, reqClose := range []bool{false, true} {
fetch := func(n int) string {
req := new(Request)
var err error
req.URL, err = url.Parse(ts.URL)
if err != nil {
t.Fatalf("URL parse error: %v", err)
}
req.Method = "GET"
req.Proto = "HTTP/1.1"
req.ProtoMajor = 1
req.ProtoMinor = 1
req.Close = reqClose
res, err := c.Do(req)
if err != nil {
t.Fatalf("error in Request.Close=%v, req #%d, Do: %v", reqClose, n, err)
}
if got, want := res.Header.Get("X-Saw-Close"), fmt.Sprint(reqClose); got != want {
t.Errorf("for Request.Close = %v; handler's X-Saw-Close was %v; want %v",
reqClose, got, !reqClose)
}
body, err := io.ReadAll(res.Body)
if err != nil {
t.Fatalf("for Request.Close=%v, on request %v/2: ReadAll: %v", reqClose, n, err)
}
return string(body)
}
body1 := fetch(1)
body2 := fetch(2)
got := 1
if body1 != body2 {
got++
}
want := 1
if reqClose {
want = 2
}
if got != want {
t.Errorf("for Request.Close=%v: server saw %v unique connections, wanted %v\n\nbodies were: %q and %q",
reqClose, got, want, body1, body2)
}
tr.CloseIdleConnections()
}
connSet.check(t)
}
// if the Transport's DisableKeepAlives is set, all requests should
// send Connection: close.
// HTTP/1-only (Connection: close doesn't exist in h2)
func TestTransportConnectionCloseOnRequestDisableKeepAlive(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(hostPortHandler)
defer ts.Close()
c := ts.Client()
c.Transport.(*Transport).DisableKeepAlives = true
res, err := c.Get(ts.URL)
if err != nil {
t.Fatal(err)
}
res.Body.Close()
if res.Header.Get("X-Saw-Close") != "true" {
t.Errorf("handler didn't see Connection: close ")
}
}
// Test that Transport only sends one "Connection: close", regardless of
// how "close" was indicated.
func TestTransportRespectRequestWantsClose(t *testing.T) {
tests := []struct {
disableKeepAlives bool
close bool
}{
{disableKeepAlives: false, close: false},
{disableKeepAlives: false, close: true},
{disableKeepAlives: true, close: false},
{disableKeepAlives: true, close: true},
}
for _, tc := range tests {
t.Run(fmt.Sprintf("DisableKeepAlive=%v,RequestClose=%v", tc.disableKeepAlives, tc.close),
func(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(hostPortHandler)
defer ts.Close()
c := ts.Client()
c.Transport.(*Transport).DisableKeepAlives = tc.disableKeepAlives
req, err := NewRequest("GET", ts.URL, nil)
if err != nil {
t.Fatal(err)
}
count := 0
trace := &httptrace.ClientTrace{
WroteHeaderField: func(key string, field []string) {
if key != "Connection" {
return
}
if httpguts.HeaderValuesContainsToken(field, "close") {
count += 1
}
},
}
req = req.WithContext(httptrace.WithClientTrace(req.Context(), trace))
req.Close = tc.close
res, err := c.Do(req)
if err != nil {
t.Fatal(err)
}
defer res.Body.Close()
if want := tc.disableKeepAlives || tc.close; count > 1 || (count == 1) != want {
t.Errorf("expecting want:%v, got 'Connection: close':%d", want, count)
}
})
}
}
func TestTransportIdleCacheKeys(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(hostPortHandler)
defer ts.Close()
c := ts.Client()
tr := c.Transport.(*Transport)
if e, g := 0, len(tr.IdleConnKeysForTesting()); e != g {
t.Errorf("After CloseIdleConnections expected %d idle conn cache keys; got %d", e, g)
}
resp, err := c.Get(ts.URL)
if err != nil {
t.Error(err)
}
io.ReadAll(resp.Body)
keys := tr.IdleConnKeysForTesting()
if e, g := 1, len(keys); e != g {
t.Fatalf("After Get expected %d idle conn cache keys; got %d", e, g)
}
if e := "|http|" + ts.Listener.Addr().String(); keys[0] != e {
t.Errorf("Expected idle cache key %q; got %q", e, keys[0])
}
tr.CloseIdleConnections()
if e, g := 0, len(tr.IdleConnKeysForTesting()); e != g {
t.Errorf("After CloseIdleConnections expected %d idle conn cache keys; got %d", e, g)
}
}
// Tests that the HTTP transport re-uses connections when a client
// reads to the end of a response Body without closing it.
func TestTransportReadToEndReusesConn(t *testing.T) {
defer afterTest(t)
const msg = "foobar"
var addrSeen map[string]int
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
addrSeen[r.RemoteAddr]++
if r.URL.Path == "/chunked/" {
w.WriteHeader(200)
w.(Flusher).Flush()
} else {
w.Header().Set("Content-Length", strconv.Itoa(len(msg)))
w.WriteHeader(200)
}
w.Write([]byte(msg))
}))
defer ts.Close()
buf := make([]byte, len(msg))
for pi, path := range []string{"/content-length/", "/chunked/"} {
wantLen := []int{len(msg), -1}[pi]
addrSeen = make(map[string]int)
for i := 0; i < 3; i++ {
res, err := Get(ts.URL + path)
if err != nil {
t.Errorf("Get %s: %v", path, err)
continue
}
// We want to close this body eventually (before the
// defer afterTest at top runs), but not before the
// len(addrSeen) check at the bottom of this test,
// since Closing this early in the loop would risk
// making connections be re-used for the wrong reason.
defer res.Body.Close()
if res.ContentLength != int64(wantLen) {
t.Errorf("%s res.ContentLength = %d; want %d", path, res.ContentLength, wantLen)
}
n, err := res.Body.Read(buf)
if n != len(msg) || err != io.EOF {
t.Errorf("%s Read = %v, %v; want %d, EOF", path, n, err, len(msg))
}
}
if len(addrSeen) != 1 {
t.Errorf("for %s, server saw %d distinct client addresses; want 1", path, len(addrSeen))
}
}
}
func TestTransportMaxPerHostIdleConns(t *testing.T) {
defer afterTest(t)
stop := make(chan struct{}) // stop marks the exit of main Test goroutine
defer close(stop)
resch := make(chan string)
gotReq := make(chan bool)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
gotReq <- true
var msg string
select {
case <-stop:
return
case msg = <-resch:
}
_, err := w.Write([]byte(msg))
if err != nil {
t.Errorf("Write: %v", err)
return
}
}))
defer ts.Close()
c := ts.Client()
tr := c.Transport.(*Transport)
maxIdleConnsPerHost := 2
tr.MaxIdleConnsPerHost = maxIdleConnsPerHost
// Start 3 outstanding requests and wait for the server to get them.
// Their responses will hang until we write to resch, though.
donech := make(chan bool)
doReq := func() {
defer func() {
select {
case <-stop:
return
case donech <- t.Failed():
}
}()
resp, err := c.Get(ts.URL)
if err != nil {
t.Error(err)
return
}
if _, err := io.ReadAll(resp.Body); err != nil {
t.Errorf("ReadAll: %v", err)
return
}
}
go doReq()
<-gotReq
go doReq()
<-gotReq
go doReq()
<-gotReq
if e, g := 0, len(tr.IdleConnKeysForTesting()); e != g {
t.Fatalf("Before writes, expected %d idle conn cache keys; got %d", e, g)
}
resch <- "res1"
<-donech
keys := tr.IdleConnKeysForTesting()
if e, g := 1, len(keys); e != g {
t.Fatalf("after first response, expected %d idle conn cache keys; got %d", e, g)
}
addr := ts.Listener.Addr().String()
cacheKey := "|http|" + addr
if keys[0] != cacheKey {
t.Fatalf("Expected idle cache key %q; got %q", cacheKey, keys[0])
}
if e, g := 1, tr.IdleConnCountForTesting("http", addr); e != g {
t.Errorf("after first response, expected %d idle conns; got %d", e, g)
}
resch <- "res2"
<-donech
if g, w := tr.IdleConnCountForTesting("http", addr), 2; g != w {
t.Errorf("after second response, idle conns = %d; want %d", g, w)
}
resch <- "res3"
<-donech
if g, w := tr.IdleConnCountForTesting("http", addr), maxIdleConnsPerHost; g != w {
t.Errorf("after third response, idle conns = %d; want %d", g, w)
}
}
func TestTransportMaxConnsPerHostIncludeDialInProgress(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
_, err := w.Write([]byte("foo"))
if err != nil {
t.Fatalf("Write: %v", err)
}
}))
defer ts.Close()
c := ts.Client()
tr := c.Transport.(*Transport)
dialStarted := make(chan struct{})
stallDial := make(chan struct{})
tr.Dial = func(network, addr string) (net.Conn, error) {
dialStarted <- struct{}{}
<-stallDial
return net.Dial(network, addr)
}
tr.DisableKeepAlives = true
tr.MaxConnsPerHost = 1
preDial := make(chan struct{})
reqComplete := make(chan struct{})
doReq := func(reqId string) {
req, _ := NewRequest("GET", ts.URL, nil)
trace := &httptrace.ClientTrace{
GetConn: func(hostPort string) {
preDial <- struct{}{}
},
}
req = req.WithContext(httptrace.WithClientTrace(req.Context(), trace))
resp, err := tr.RoundTrip(req)
if err != nil {
t.Errorf("unexpected error for request %s: %v", reqId, err)
}
_, err = io.ReadAll(resp.Body)
if err != nil {
t.Errorf("unexpected error for request %s: %v", reqId, err)
}
reqComplete <- struct{}{}
}
// get req1 to dial-in-progress
go doReq("req1")
<-preDial
<-dialStarted
// get req2 to waiting on conns per host to go down below max
go doReq("req2")
<-preDial
select {
case <-dialStarted:
t.Error("req2 dial started while req1 dial in progress")
return
default:
}
// let req1 complete
stallDial <- struct{}{}
<-reqComplete
// let req2 complete
<-dialStarted
stallDial <- struct{}{}
<-reqComplete
}
func TestTransportMaxConnsPerHost(t *testing.T) {
defer afterTest(t)
CondSkipHTTP2(t)
h := HandlerFunc(func(w ResponseWriter, r *Request) {
_, err := w.Write([]byte("foo"))
if err != nil {
t.Fatalf("Write: %v", err)
}
})
testMaxConns := func(scheme string, ts *httptest.Server) {
defer ts.Close()
c := ts.Client()
tr := c.Transport.(*Transport)
tr.MaxConnsPerHost = 1
if err := ExportHttp2ConfigureTransport(tr); err != nil {
t.Fatalf("ExportHttp2ConfigureTransport: %v", err)
}
mu := sync.Mutex{}
var conns []net.Conn
var dialCnt, gotConnCnt, tlsHandshakeCnt int32
tr.Dial = func(network, addr string) (net.Conn, error) {
atomic.AddInt32(&dialCnt, 1)
c, err := net.Dial(network, addr)
mu.Lock()
defer mu.Unlock()
conns = append(conns, c)
return c, err
}
doReq := func() {
trace := &httptrace.ClientTrace{
GotConn: func(connInfo httptrace.GotConnInfo) {
if !connInfo.Reused {
atomic.AddInt32(&gotConnCnt, 1)
}
},
TLSHandshakeStart: func() {
atomic.AddInt32(&tlsHandshakeCnt, 1)
},
}
req, _ := NewRequest("GET", ts.URL, nil)
req = req.WithContext(httptrace.WithClientTrace(req.Context(), trace))
resp, err := c.Do(req)
if err != nil {
t.Fatalf("request failed: %v", err)
}
defer resp.Body.Close()
_, err = io.ReadAll(resp.Body)
if err != nil {
t.Fatalf("read body failed: %v", err)
}
}
wg := sync.WaitGroup{}
for i := 0; i < 10; i++ {
wg.Add(1)
go func() {
defer wg.Done()
doReq()
}()
}
wg.Wait()
expected := int32(tr.MaxConnsPerHost)
if dialCnt != expected {
t.Errorf("round 1: too many dials (%s): %d != %d", scheme, dialCnt, expected)
}
if gotConnCnt != expected {
t.Errorf("round 1: too many get connections (%s): %d != %d", scheme, gotConnCnt, expected)
}
if ts.TLS != nil && tlsHandshakeCnt != expected {
t.Errorf("round 1: too many tls handshakes (%s): %d != %d", scheme, tlsHandshakeCnt, expected)
}
if t.Failed() {
t.FailNow()
}
mu.Lock()
for _, c := range conns {
c.Close()
}
conns = nil
mu.Unlock()
tr.CloseIdleConnections()
doReq()
expected++
if dialCnt != expected {
t.Errorf("round 2: too many dials (%s): %d", scheme, dialCnt)
}
if gotConnCnt != expected {
t.Errorf("round 2: too many get connections (%s): %d != %d", scheme, gotConnCnt, expected)
}
if ts.TLS != nil && tlsHandshakeCnt != expected {
t.Errorf("round 2: too many tls handshakes (%s): %d != %d", scheme, tlsHandshakeCnt, expected)
}
}
testMaxConns("http", httptest.NewServer(h))
testMaxConns("https", httptest.NewTLSServer(h))
ts := httptest.NewUnstartedServer(h)
ts.TLS = &tls.Config{NextProtos: []string{"h2"}}
ts.StartTLS()
testMaxConns("http2", ts)
}
func TestTransportRemovesDeadIdleConnections(t *testing.T) {
setParallel(t)
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
io.WriteString(w, r.RemoteAddr)
}))
defer ts.Close()
c := ts.Client()
tr := c.Transport.(*Transport)
doReq := func(name string) string {
// Do a POST instead of a GET to prevent the Transport's
// idempotent request retry logic from kicking in...
res, err := c.Post(ts.URL, "", nil)
if err != nil {
t.Fatalf("%s: %v", name, err)
}
if res.StatusCode != 200 {
t.Fatalf("%s: %v", name, res.Status)
}
defer res.Body.Close()
slurp, err := io.ReadAll(res.Body)
if err != nil {
t.Fatalf("%s: %v", name, err)
}
return string(slurp)
}
first := doReq("first")
keys1 := tr.IdleConnKeysForTesting()
ts.CloseClientConnections()
var keys2 []string
if !waitCondition(3*time.Second, 50*time.Millisecond, func() bool {
keys2 = tr.IdleConnKeysForTesting()
return len(keys2) == 0
}) {
t.Fatalf("Transport didn't notice idle connection's death.\nbefore: %q\n after: %q\n", keys1, keys2)
}
second := doReq("second")
if first == second {
t.Errorf("expected a different connection between requests. got %q both times", first)
}
}
// Test that the Transport notices when a server hangs up on its
// unexpectedly (a keep-alive connection is closed).
func TestTransportServerClosingUnexpectedly(t *testing.T) {
setParallel(t)
defer afterTest(t)
ts := httptest.NewServer(hostPortHandler)
defer ts.Close()
c := ts.Client()
fetch := func(n, retries int) string {
condFatalf := func(format string, arg ...any) {
if retries <= 0 {
t.Fatalf(format, arg...)
}
t.Logf("retrying shortly after expected error: "+format, arg...)
time.Sleep(time.Second / time.Duration(retries))
}
for retries >= 0 {
retries--
res, err := c.Get(ts.URL)
if err != nil {
condFatalf("error in req #%d, GET: %v", n, err)
continue
}
body, err := io.ReadAll(res.Body)
if err != nil {
condFatalf("error in req #%d, ReadAll: %v", n, err)
continue
}
res.Body.Close()
return string(body)
}
panic("unreachable")
}
body1 := fetch(1, 0)
body2 := fetch(2, 0)
// Close all the idle connections in a way that's similar to
// the server hanging up on us. We don't use
// httptest.Server.CloseClientConnections because it's
// best-effort and stops blocking after 5 seconds. On a loaded
// machine running many tests concurrently it's possible for
// that method to be async and cause the body3 fetch below to
// run on an old connection. This function is synchronous.
ExportCloseTransportConnsAbruptly(c.Transport.(*Transport))
body3 := fetch(3, 5)
if body1 != body2 {
t.Errorf("expected body1 and body2 to be equal")
}
if body2 == body3 {
t.Errorf("expected body2 and body3 to be different")
}
}
// Test for https://golang.org/issue/2616 (appropriate issue number)
// This fails pretty reliably with GOMAXPROCS=100 or something high.
func TestStressSurpriseServerCloses(t *testing.T) {
defer afterTest(t)
if testing.Short() {
t.Skip("skipping test in short mode")
}
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Length", "5")
w.Header().Set("Content-Type", "text/plain")
w.Write([]byte("Hello"))
w.(Flusher).Flush()
conn, buf, _ := w.(Hijacker).Hijack()
buf.Flush()
conn.Close()
}))
defer ts.Close()
c := ts.Client()
// Do a bunch of traffic from different goroutines. Send to activityc
// after each request completes, regardless of whether it failed.
// If these are too high, OS X exhausts its ephemeral ports
// and hangs waiting for them to transition TCP states. That's
// not what we want to test. TODO(bradfitz): use an io.Pipe
// dialer for this test instead?
const (
numClients = 20
reqsPerClient = 25
)
activityc := make(chan bool)
for i := 0; i < numClients; i++ {
go func() {
for i := 0; i < reqsPerClient; i++ {
res, err := c.Get(ts.URL)
if err == nil {
// We expect errors since the server is
// hanging up on us after telling us to
// send more requests, so we don't
// actually care what the error is.
// But we want to close the body in cases
// where we won the race.
res.Body.Close()
}
if !<-activityc { // Receives false when close(activityc) is executed
return
}
}
}()
}
// Make sure all the request come back, one way or another.
for i := 0; i < numClients*reqsPerClient; i++ {
select {
case activityc <- true:
case <-time.After(5 * time.Second):
close(activityc)
t.Fatalf("presumed deadlock; no HTTP client activity seen in awhile")
}
}
}
// TestTransportHeadResponses verifies that we deal with Content-Lengths
// with no bodies properly
func TestTransportHeadResponses(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
if r.Method != "HEAD" {
panic("expected HEAD; got " + r.Method)
}
w.Header().Set("Content-Length", "123")
w.WriteHeader(200)
}))
defer ts.Close()
c := ts.Client()
for i := 0; i < 2; i++ {
res, err := c.Head(ts.URL)
if err != nil {
t.Errorf("error on loop %d: %v", i, err)
continue
}
if e, g := "123", res.Header.Get("Content-Length"); e != g {
t.Errorf("loop %d: expected Content-Length header of %q, got %q", i, e, g)
}
if e, g := int64(123), res.ContentLength; e != g {
t.Errorf("loop %d: expected res.ContentLength of %v, got %v", i, e, g)
}
if all, err := io.ReadAll(res.Body); err != nil {
t.Errorf("loop %d: Body ReadAll: %v", i, err)
} else if len(all) != 0 {
t.Errorf("Bogus body %q", all)
}
}
}
// TestTransportHeadChunkedResponse verifies that we ignore chunked transfer-encoding
// on responses to HEAD requests.
func TestTransportHeadChunkedResponse(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
if r.Method != "HEAD" {
panic("expected HEAD; got " + r.Method)
}
w.Header().Set("Transfer-Encoding", "chunked") // client should ignore
w.Header().Set("x-client-ipport", r.RemoteAddr)
w.WriteHeader(200)
}))
defer ts.Close()
c := ts.Client()
// Ensure that we wait for the readLoop to complete before
// calling Head again
didRead := make(chan bool)
SetReadLoopBeforeNextReadHook(func() { didRead <- true })
defer SetReadLoopBeforeNextReadHook(nil)
res1, err := c.Head(ts.URL)
<-didRead
if err != nil {
t.Fatalf("request 1 error: %v", err)
}
res2, err := c.Head(ts.URL)
<-didRead
if err != nil {
t.Fatalf("request 2 error: %v", err)
}
if v1, v2 := res1.Header.Get("x-client-ipport"), res2.Header.Get("x-client-ipport"); v1 != v2 {
t.Errorf("ip/ports differed between head requests: %q vs %q", v1, v2)
}
}
var roundTripTests = []struct {
accept string
expectAccept string
compressed bool
}{
// Requests with no accept-encoding header use transparent compression
{"", "gzip", false},
// Requests with other accept-encoding should pass through unmodified
{"foo", "foo", false},
// Requests with accept-encoding == gzip should be passed through
{"gzip", "gzip", true},
}
// Test that the modification made to the Request by the RoundTripper is cleaned up
func TestRoundTripGzip(t *testing.T) {
setParallel(t)
defer afterTest(t)
const responseBody = "test response body"
ts := httptest.NewServer(HandlerFunc(func(rw ResponseWriter, req *Request) {
accept := req.Header.Get("Accept-Encoding")
if expect := req.FormValue("expect_accept"); accept != expect {
t.Errorf("in handler, test %v: Accept-Encoding = %q, want %q",
req.FormValue("testnum"), accept, expect)
}
if accept == "gzip" {
rw.Header().Set("Content-Encoding", "gzip")
gz := gzip.NewWriter(rw)
gz.Write([]byte(responseBody))
gz.Close()
} else {
rw.Header().Set("Content-Encoding", accept)
rw.Write([]byte(responseBody))
}
}))
defer ts.Close()
tr := ts.Client().Transport.(*Transport)
for i, test := range roundTripTests {
// Test basic request (no accept-encoding)
req, _ := NewRequest("GET", fmt.Sprintf("%s/?testnum=%d&expect_accept=%s", ts.URL, i, test.expectAccept), nil)
if test.accept != "" {
req.Header.Set("Accept-Encoding", test.accept)
}
res, err := tr.RoundTrip(req)
if err != nil {
t.Errorf("%d. RoundTrip: %v", i, err)
continue
}
var body []byte
if test.compressed {
var r *gzip.Reader
r, err = gzip.NewReader(res.Body)
if err != nil {
t.Errorf("%d. gzip NewReader: %v", i, err)
continue
}
body, err = io.ReadAll(r)
res.Body.Close()
} else {
body, err = io.ReadAll(res.Body)
}
if err != nil {
t.Errorf("%d. Error: %q", i, err)
continue
}
if g, e := string(body), responseBody; g != e {
t.Errorf("%d. body = %q; want %q", i, g, e)
}
if g, e := req.Header.Get("Accept-Encoding"), test.accept; g != e {
t.Errorf("%d. Accept-Encoding = %q; want %q (it was mutated, in violation of RoundTrip contract)", i, g, e)
}
if g, e := res.Header.Get("Content-Encoding"), test.accept; g != e {
t.Errorf("%d. Content-Encoding = %q; want %q", i, g, e)
}
}
}
func TestTransportGzip(t *testing.T) {
setParallel(t)
defer afterTest(t)
const testString = "The test string aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
const nRandBytes = 1024 * 1024
ts := httptest.NewServer(HandlerFunc(func(rw ResponseWriter, req *Request) {
if req.Method == "HEAD" {
if g := req.Header.Get("Accept-Encoding"); g != "" {
t.Errorf("HEAD request sent with Accept-Encoding of %q; want none", g)
}
return
}
if g, e := req.Header.Get("Accept-Encoding"), "gzip"; g != e {
t.Errorf("Accept-Encoding = %q, want %q", g, e)
}
rw.Header().Set("Content-Encoding", "gzip")
var w io.Writer = rw
var buf bytes.Buffer
if req.FormValue("chunked") == "0" {
w = &buf
defer io.Copy(rw, &buf)
defer func() {
rw.Header().Set("Content-Length", strconv.Itoa(buf.Len()))
}()
}
gz := gzip.NewWriter(w)
gz.Write([]byte(testString))
if req.FormValue("body") == "large" {
io.CopyN(gz, rand.Reader, nRandBytes)
}
gz.Close()
}))
defer ts.Close()
c := ts.Client()
for _, chunked := range []string{"1", "0"} {
// First fetch something large, but only read some of it.
res, err := c.Get(ts.URL + "/?body=large&chunked=" + chunked)
if err != nil {
t.Fatalf("large get: %v", err)
}
buf := make([]byte, len(testString))
n, err := io.ReadFull(res.Body, buf)
if err != nil {
t.Fatalf("partial read of large response: size=%d, %v", n, err)
}
if e, g := testString, string(buf); e != g {
t.Errorf("partial read got %q, expected %q", g, e)
}
res.Body.Close()
// Read on the body, even though it's closed
n, err = res.Body.Read(buf)
if n != 0 || err == nil {
t.Errorf("expected error post-closed large Read; got = %d, %v", n, err)
}
// Then something small.
res, err = c.Get(ts.URL + "/?chunked=" + chunked)
if err != nil {
t.Fatal(err)
}
body, err := io.ReadAll(res.Body)
if err != nil {
t.Fatal(err)
}
if g, e := string(body), testString; g != e {
t.Fatalf("body = %q; want %q", g, e)
}
if g, e := res.Header.Get("Content-Encoding"), ""; g != e {
t.Fatalf("Content-Encoding = %q; want %q", g, e)
}
// Read on the body after it's been fully read:
n, err = res.Body.Read(buf)
if n != 0 || err == nil {
t.Errorf("expected Read error after exhausted reads; got %d, %v", n, err)
}
res.Body.Close()
n, err = res.Body.Read(buf)
if n != 0 || err == nil {
t.Errorf("expected Read error after Close; got %d, %v", n, err)
}
}
// And a HEAD request too, because they're always weird.
res, err := c.Head(ts.URL)
if err != nil {
t.Fatalf("Head: %v", err)
}
if res.StatusCode != 200 {
t.Errorf("Head status=%d; want=200", res.StatusCode)
}
}
// If a request has Expect:100-continue header, the request blocks sending body until the first response.
// Premature consumption of the request body should not be occurred.
func TestTransportExpect100Continue(t *testing.T) {
setParallel(t)
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(rw ResponseWriter, req *Request) {
switch req.URL.Path {
case "/100":
// This endpoint implicitly responds 100 Continue and reads body.
if _, err := io.Copy(io.Discard, req.Body); err != nil {
t.Error("Failed to read Body", err)
}
rw.WriteHeader(StatusOK)
case "/200":
// Go 1.5 adds Connection: close header if the client expect
// continue but not entire request body is consumed.
rw.WriteHeader(StatusOK)
case "/500":
rw.WriteHeader(StatusInternalServerError)
case "/keepalive":
// This hijacked endpoint responds error without Connection:close.
_, bufrw, err := rw.(Hijacker).Hijack()
if err != nil {
log.Fatal(err)
}
bufrw.WriteString("HTTP/1.1 500 Internal Server Error\r\n")
bufrw.WriteString("Content-Length: 0\r\n\r\n")
bufrw.Flush()
case "/timeout":
// This endpoint tries to read body without 100 (Continue) response.
// After ExpectContinueTimeout, the reading will be started.
conn, bufrw, err := rw.(Hijacker).Hijack()
if err != nil {
log.Fatal(err)
}
if _, err := io.CopyN(io.Discard, bufrw, req.ContentLength); err != nil {
t.Error("Failed to read Body", err)
}
bufrw.WriteString("HTTP/1.1 200 OK\r\n\r\n")
bufrw.Flush()
conn.Close()
}
}))
defer ts.Close()
tests := []struct {
path string
body []byte
sent int
status int
}{
{path: "/100", body: []byte("hello"), sent: 5, status: 200}, // Got 100 followed by 200, entire body is sent.
{path: "/200", body: []byte("hello"), sent: 0, status: 200}, // Got 200 without 100. body isn't sent.
{path: "/500", body: []byte("hello"), sent: 0, status: 500}, // Got 500 without 100. body isn't sent.
{path: "/keepalive", body: []byte("hello"), sent: 0, status: 500}, // Although without Connection:close, body isn't sent.
{path: "/timeout", body: []byte("hello"), sent: 5, status: 200}, // Timeout exceeded and entire body is sent.
}
c := ts.Client()
for i, v := range tests {
tr := &Transport{
ExpectContinueTimeout: 2 * time.Second,
}
defer tr.CloseIdleConnections()
c.Transport = tr
body := bytes.NewReader(v.body)
req, err := NewRequest("PUT", ts.URL+v.path, body)
if err != nil {
t.Fatal(err)
}
req.Header.Set("Expect", "100-continue")
req.ContentLength = int64(len(v.body))
resp, err := c.Do(req)
if err != nil {
t.Fatal(err)
}
resp.Body.Close()
sent := len(v.body) - body.Len()
if v.status != resp.StatusCode {
t.Errorf("test %d: status code should be %d but got %d. (%s)", i, v.status, resp.StatusCode, v.path)
}
if v.sent != sent {
t.Errorf("test %d: sent body should be %d but sent %d. (%s)", i, v.sent, sent, v.path)
}
}
}
func TestSOCKS5Proxy(t *testing.T) {
defer afterTest(t)
ch := make(chan string, 1)
l := newLocalListener(t)
defer l.Close()
defer close(ch)
proxy := func(t *testing.T) {
s, err := l.Accept()
if err != nil {
t.Errorf("socks5 proxy Accept(): %v", err)
return
}
defer s.Close()
var buf [22]byte
if _, err := io.ReadFull(s, buf[:3]); err != nil {
t.Errorf("socks5 proxy initial read: %v", err)
return
}
if want := []byte{5, 1, 0}; !bytes.Equal(buf[:3], want) {
t.Errorf("socks5 proxy initial read: got %v, want %v", buf[:3], want)
return
}
if _, err := s.Write([]byte{5, 0}); err != nil {
t.Errorf("socks5 proxy initial write: %v", err)
return
}
if _, err := io.ReadFull(s, buf[:4]); err != nil {
t.Errorf("socks5 proxy second read: %v", err)
return
}
if want := []byte{5, 1, 0}; !bytes.Equal(buf[:3], want) {
t.Errorf("socks5 proxy second read: got %v, want %v", buf[:3], want)
return
}
var ipLen int
switch buf[3] {
case 1:
ipLen = net.IPv4len
case 4:
ipLen = net.IPv6len
default:
t.Errorf("socks5 proxy second read: unexpected address type %v", buf[4])
return
}
if _, err := io.ReadFull(s, buf[4:ipLen+6]); err != nil {
t.Errorf("socks5 proxy address read: %v", err)
return
}
ip := net.IP(buf[4 : ipLen+4])
port := binary.BigEndian.Uint16(buf[ipLen+4 : ipLen+6])
copy(buf[:3], []byte{5, 0, 0})
if _, err := s.Write(buf[:ipLen+6]); err != nil {
t.Errorf("socks5 proxy connect write: %v", err)
return
}
ch <- fmt.Sprintf("proxy for %s:%d", ip, port)
// Implement proxying.
targetHost := net.JoinHostPort(ip.String(), strconv.Itoa(int(port)))
targetConn, err := net.Dial("tcp", targetHost)
if err != nil {
t.Errorf("net.Dial failed")
return
}
go io.Copy(targetConn, s)
io.Copy(s, targetConn) // Wait for the client to close the socket.
targetConn.Close()
}
pu, err := url.Parse("socks5://" + l.Addr().String())
if err != nil {
t.Fatal(err)
}
sentinelHeader := "X-Sentinel"
sentinelValue := "12345"
h := HandlerFunc(func(w ResponseWriter, r *Request) {
w.Header().Set(sentinelHeader, sentinelValue)
})
for _, useTLS := range []bool{false, true} {
t.Run(fmt.Sprintf("useTLS=%v", useTLS), func(t *testing.T) {
var ts *httptest.Server
if useTLS {
ts = httptest.NewTLSServer(h)
} else {
ts = httptest.NewServer(h)
}
go proxy(t)
c := ts.Client()
c.Transport.(*Transport).Proxy = ProxyURL(pu)
r, err := c.Head(ts.URL)
if err != nil {
t.Fatal(err)
}
if r.Header.Get(sentinelHeader) != sentinelValue {
t.Errorf("Failed to retrieve sentinel value")
}
var got string
select {
case got = <-ch:
case <-time.After(5 * time.Second):
t.Fatal("timeout connecting to socks5 proxy")
}
ts.Close()
tsu, err := url.Parse(ts.URL)
if err != nil {
t.Fatal(err)
}
want := "proxy for " + tsu.Host
if got != want {
t.Errorf("got %q, want %q", got, want)
}
})
}
}
func TestTransportProxy(t *testing.T) {
defer afterTest(t)
testCases := []struct{ httpsSite, httpsProxy bool }{
{false, false},
{false, true},
{true, false},
{true, true},
}
for _, testCase := range testCases {
httpsSite := testCase.httpsSite
httpsProxy := testCase.httpsProxy
t.Run(fmt.Sprintf("httpsSite=%v, httpsProxy=%v", httpsSite, httpsProxy), func(t *testing.T) {
siteCh := make(chan *Request, 1)
h1 := HandlerFunc(func(w ResponseWriter, r *Request) {
siteCh <- r
})
proxyCh := make(chan *Request, 1)
h2 := HandlerFunc(func(w ResponseWriter, r *Request) {
proxyCh <- r
// Implement an entire CONNECT proxy
if r.Method == "CONNECT" {
hijacker, ok := w.(Hijacker)
if !ok {
t.Errorf("hijack not allowed")
return
}
clientConn, _, err := hijacker.Hijack()
if err != nil {
t.Errorf("hijacking failed")
return
}
res := &Response{
StatusCode: StatusOK,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Header: make(Header),
}
targetConn, err := net.Dial("tcp", r.URL.Host)
if err != nil {
t.Errorf("net.Dial(%q) failed: %v", r.URL.Host, err)
return
}
if err := res.Write(clientConn); err != nil {
t.Errorf("Writing 200 OK failed: %v", err)
return
}
go io.Copy(targetConn, clientConn)
go func() {
io.Copy(clientConn, targetConn)
targetConn.Close()
}()
}
})
var ts *httptest.Server
if httpsSite {
ts = httptest.NewTLSServer(h1)
} else {
ts = httptest.NewServer(h1)
}
var proxy *httptest.Server
if httpsProxy {
proxy = httptest.NewTLSServer(h2)
} else {
proxy = httptest.NewServer(h2)
}
pu, err := url.Parse(proxy.URL)
if err != nil {
t.Fatal(err)
}
// If neither server is HTTPS or both are, then c may be derived from either.
// If only one server is HTTPS, c must be derived from that server in order
// to ensure that it is configured to use the fake root CA from testcert.go.
c := proxy.Client()
if httpsSite {
c = ts.Client()
}
c.Transport.(*Transport).Proxy = ProxyURL(pu)
if _, err := c.Head(ts.URL); err != nil {
t.Error(err)
}
var got *Request
select {
case got = <-proxyCh:
case <-time.After(5 * time.Second):
t.Fatal("timeout connecting to http proxy")
}
c.Transport.(*Transport).CloseIdleConnections()
ts.Close()
proxy.Close()
if httpsSite {
// First message should be a CONNECT, asking for a socket to the real server,
if got.Method != "CONNECT" {
t.Errorf("Wrong method for secure proxying: %q", got.Method)
}
gotHost := got.URL.Host
pu, err := url.Parse(ts.URL)
if err != nil {
t.Fatal("Invalid site URL")
}
if wantHost := pu.Host; gotHost != wantHost {
t.Errorf("Got CONNECT host %q, want %q", gotHost, wantHost)
}
// The next message on the channel should be from the site's server.
next := <-siteCh
if next.Method != "HEAD" {
t.Errorf("Wrong method at destination: %s", next.Method)
}
if nextURL := next.URL.String(); nextURL != "/" {
t.Errorf("Wrong URL at destination: %s", nextURL)
}
} else {
if got.Method != "HEAD" {
t.Errorf("Wrong method for destination: %q", got.Method)
}
gotURL := got.URL.String()
wantURL := ts.URL + "/"
if gotURL != wantURL {
t.Errorf("Got URL %q, want %q", gotURL, wantURL)
}
}
})
}
}
// Issue 28012: verify that the Transport closes its TCP connection to http proxies
// when they're slow to reply to HTTPS CONNECT responses.
func TestTransportProxyHTTPSConnectLeak(t *testing.T) {
setParallel(t)
defer afterTest(t)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
ln := newLocalListener(t)
defer ln.Close()
listenerDone := make(chan struct{})
go func() {
defer close(listenerDone)
c, err := ln.Accept()
if err != nil {
t.Errorf("Accept: %v", err)
return
}
defer c.Close()
// Read the CONNECT request
br := bufio.NewReader(c)
cr, err := ReadRequest(br)
if err != nil {
t.Errorf("proxy server failed to read CONNECT request")
return
}
if cr.Method != "CONNECT" {
t.Errorf("unexpected method %q", cr.Method)
return
}
// Now hang and never write a response; instead, cancel the request and wait
// for the client to close.
// (Prior to Issue 28012 being fixed, we never closed.)
cancel()
var buf [1]byte
_, err = br.Read(buf[:])
if err != io.EOF {
t.Errorf("proxy server Read err = %v; want EOF", err)
}
return
}()
c := &Client{
Transport: &Transport{
Proxy: func(*Request) (*url.URL, error) {
return url.Parse("http://" + ln.Addr().String())
},
},
}
req, err := NewRequestWithContext(ctx, "GET", "https://golang.fake.tld/", nil)
if err != nil {
t.Fatal(err)
}
_, err = c.Do(req)
if err == nil {
t.Errorf("unexpected Get success")
}
// Wait unconditionally for the listener goroutine to exit: this should never
// hang, so if it does we want a full goroutine dump — and that's exactly what
// the testing package will give us when the test run times out.
<-listenerDone
}
// Issue 16997: test transport dial preserves typed errors
func TestTransportDialPreservesNetOpProxyError(t *testing.T) {
defer afterTest(t)
var errDial = errors.New("some dial error")
tr := &Transport{
Proxy: func(*Request) (*url.URL, error) {
return url.Parse("http://proxy.fake.tld/")
},
Dial: func(string, string) (net.Conn, error) {
return nil, errDial
},
}
defer tr.CloseIdleConnections()
c := &Client{Transport: tr}
req, _ := NewRequest("GET", "http://fake.tld", nil)
res, err := c.Do(req)
if err == nil {
res.Body.Close()
t.Fatal("wanted a non-nil error")
}
uerr, ok := err.(*url.Error)
if !ok {
t.Fatalf("got %T, want *url.Error", err)
}
oe, ok := uerr.Err.(*net.OpError)
if !ok {
t.Fatalf("url.Error.Err = %T; want *net.OpError", uerr.Err)
}
want := &net.OpError{
Op: "proxyconnect",
Net: "tcp",
Err: errDial, // original error, unwrapped.
}
if !reflect.DeepEqual(oe, want) {
t.Errorf("Got error %#v; want %#v", oe, want)
}
}
// Issue 36431: calls to RoundTrip should not mutate t.ProxyConnectHeader.
//
// (A bug caused dialConn to instead write the per-request Proxy-Authorization
// header through to the shared Header instance, introducing a data race.)
func TestTransportProxyDialDoesNotMutateProxyConnectHeader(t *testing.T) {
setParallel(t)
defer afterTest(t)
proxy := httptest.NewTLSServer(NotFoundHandler())
defer proxy.Close()
c := proxy.Client()
tr := c.Transport.(*Transport)
tr.Proxy = func(*Request) (*url.URL, error) {
u, _ := url.Parse(proxy.URL)
u.User = url.UserPassword("aladdin", "opensesame")
return u, nil
}
h := tr.ProxyConnectHeader
if h == nil {
h = make(Header)
}
tr.ProxyConnectHeader = h.Clone()
req, err := NewRequest("GET", "https://golang.fake.tld/", nil)
if err != nil {
t.Fatal(err)
}
_, err = c.Do(req)
if err == nil {
t.Errorf("unexpected Get success")
}
if !reflect.DeepEqual(tr.ProxyConnectHeader, h) {
t.Errorf("tr.ProxyConnectHeader = %v; want %v", tr.ProxyConnectHeader, h)
}
}
// TestTransportGzipRecursive sends a gzip quine and checks that the
// client gets the same value back. This is more cute than anything,
// but checks that we don't recurse forever, and checks that
// Content-Encoding is removed.
func TestTransportGzipRecursive(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Encoding", "gzip")
w.Write(rgz)
}))
defer ts.Close()
c := ts.Client()
res, err := c.Get(ts.URL)
if err != nil {
t.Fatal(err)
}
body, err := io.ReadAll(res.Body)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(body, rgz) {
t.Fatalf("Incorrect result from recursive gz:\nhave=%x\nwant=%x",
body, rgz)
}
if g, e := res.Header.Get("Content-Encoding"), ""; g != e {
t.Fatalf("Content-Encoding = %q; want %q", g, e)
}
}
// golang.org/issue/7750: request fails when server replies with
// a short gzip body
func TestTransportGzipShort(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Encoding", "gzip")
w.Write([]byte{0x1f, 0x8b})
}))
defer ts.Close()
c := ts.Client()
res, err := c.Get(ts.URL)
if err != nil {
t.Fatal(err)
}
defer res.Body.Close()
_, err = io.ReadAll(res.Body)
if err == nil {
t.Fatal("Expect an error from reading a body.")
}
if err != io.ErrUnexpectedEOF {
t.Errorf("ReadAll error = %v; want io.ErrUnexpectedEOF", err)
}
}
// Wait until number of goroutines is no greater than nmax, or time out.
func waitNumGoroutine(nmax int) int {
nfinal := runtime.NumGoroutine()
for ntries := 10; ntries > 0 && nfinal > nmax; ntries-- {
time.Sleep(50 * time.Millisecond)
runtime.GC()
nfinal = runtime.NumGoroutine()
}
return nfinal
}
// tests that persistent goroutine connections shut down when no longer desired.
func TestTransportPersistConnLeak(t *testing.T) {
// Not parallel: counts goroutines
defer afterTest(t)
const numReq = 25
gotReqCh := make(chan bool, numReq)
unblockCh := make(chan bool, numReq)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
gotReqCh <- true
<-unblockCh
w.Header().Set("Content-Length", "0")
w.WriteHeader(204)
}))
defer ts.Close()
c := ts.Client()
tr := c.Transport.(*Transport)
n0 := runtime.NumGoroutine()
didReqCh := make(chan bool, numReq)
failed := make(chan bool, numReq)
for i := 0; i < numReq; i++ {
go func() {
res, err := c.Get(ts.URL)
didReqCh <- true
if err != nil {
t.Logf("client fetch error: %v", err)
failed <- true
return
}
res.Body.Close()
}()
}
// Wait for all goroutines to be stuck in the Handler.
for i := 0; i < numReq; i++ {
select {
case <-gotReqCh:
// ok
case <-failed:
// Not great but not what we are testing:
// sometimes an overloaded system will fail to make all the connections.
}
}
nhigh := runtime.NumGoroutine()
// Tell all handlers to unblock and reply.
close(unblockCh)
// Wait for all HTTP clients to be done.
for i := 0; i < numReq; i++ {
<-didReqCh
}
tr.CloseIdleConnections()
nfinal := waitNumGoroutine(n0 + 5)
growth := nfinal - n0
// We expect 0 or 1 extra goroutine, empirically. Allow up to 5.
// Previously we were leaking one per numReq.
if int(growth) > 5 {
t.Logf("goroutine growth: %d -> %d -> %d (delta: %d)", n0, nhigh, nfinal, growth)
t.Error("too many new goroutines")
}
}
// golang.org/issue/4531: Transport leaks goroutines when
// request.ContentLength is explicitly short
func TestTransportPersistConnLeakShortBody(t *testing.T) {
// Not parallel: measures goroutines.
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
}))
defer ts.Close()
c := ts.Client()
tr := c.Transport.(*Transport)
n0 := runtime.NumGoroutine()
body := []byte("Hello")
for i := 0; i < 20; i++ {
req, err := NewRequest("POST", ts.URL, bytes.NewReader(body))
if err != nil {
t.Fatal(err)
}
req.ContentLength = int64(len(body) - 2) // explicitly short
_, err = c.Do(req)
if err == nil {
t.Fatal("Expect an error from writing too long of a body.")
}
}
nhigh := runtime.NumGoroutine()
tr.CloseIdleConnections()
nfinal := waitNumGoroutine(n0 + 5)
growth := nfinal - n0
// We expect 0 or 1 extra goroutine, empirically. Allow up to 5.
// Previously we were leaking one per numReq.
t.Logf("goroutine growth: %d -> %d -> %d (delta: %d)", n0, nhigh, nfinal, growth)
if int(growth) > 5 {
t.Error("too many new goroutines")
}
}
// A countedConn is a net.Conn that decrements an atomic counter when finalized.
type countedConn struct {
net.Conn
}
// A countingDialer dials connections and counts the number that remain reachable.
type countingDialer struct {
dialer net.Dialer
mu sync.Mutex
total, live int64
}
func (d *countingDialer) DialContext(ctx context.Context, network, address string) (net.Conn, error) {
conn, err := d.dialer.DialContext(ctx, network, address)
if err != nil {
return nil, err
}
counted := new(countedConn)
counted.Conn = conn
d.mu.Lock()
defer d.mu.Unlock()
d.total++
d.live++
runtime.SetFinalizer(counted, d.decrement)
return counted, nil
}
func (d *countingDialer) decrement(*countedConn) {
d.mu.Lock()
defer d.mu.Unlock()
d.live--
}
func (d *countingDialer) Read() (total, live int64) {
d.mu.Lock()
defer d.mu.Unlock()
return d.total, d.live
}
func TestTransportPersistConnLeakNeverIdle(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
// Close every connection so that it cannot be kept alive.
conn, _, err := w.(Hijacker).Hijack()
if err != nil {
t.Errorf("Hijack failed unexpectedly: %v", err)
return
}
conn.Close()
}))
defer ts.Close()
var d countingDialer
c := ts.Client()
c.Transport.(*Transport).DialContext = d.DialContext
body := []byte("Hello")
for i := 0; ; i++ {
total, live := d.Read()
if live < total {
break
}
if i >= 1<<12 {
t.Fatalf("Count of live client net.Conns (%d) not lower than total (%d) after %d Do / GC iterations.", live, total, i)
}
req, err := NewRequest("POST", ts.URL, bytes.NewReader(body))
if err != nil {
t.Fatal(err)
}
_, err = c.Do(req)
if err == nil {
t.Fatal("expected broken connection")
}
runtime.GC()
}
}
type countedContext struct {
context.Context
}
type contextCounter struct {
mu sync.Mutex
live int64
}
func (cc *contextCounter) Track(ctx context.Context) context.Context {
counted := new(countedContext)
counted.Context = ctx
cc.mu.Lock()
defer cc.mu.Unlock()
cc.live++
runtime.SetFinalizer(counted, cc.decrement)
return counted
}
func (cc *contextCounter) decrement(*countedContext) {
cc.mu.Lock()
defer cc.mu.Unlock()
cc.live--
}
func (cc *contextCounter) Read() (live int64) {
cc.mu.Lock()
defer cc.mu.Unlock()
return cc.live
}
func TestTransportPersistConnContextLeakMaxConnsPerHost(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
runtime.Gosched()
w.WriteHeader(StatusOK)
}))
defer ts.Close()
c := ts.Client()
c.Transport.(*Transport).MaxConnsPerHost = 1
ctx := context.Background()
body := []byte("Hello")
doPosts := func(cc *contextCounter) {
var wg sync.WaitGroup
for n := 64; n > 0; n-- {
wg.Add(1)
go func() {
defer wg.Done()
ctx := cc.Track(ctx)
req, err := NewRequest("POST", ts.URL, bytes.NewReader(body))
if err != nil {
t.Error(err)
}
_, err = c.Do(req.WithContext(ctx))
if err != nil {
t.Errorf("Do failed with error: %v", err)
}
}()
}
wg.Wait()
}
var initialCC contextCounter
doPosts(&initialCC)
// flushCC exists only to put pressure on the GC to finalize the initialCC
// contexts: the flushCC allocations should eventually displace the initialCC
// allocations.
var flushCC contextCounter
for i := 0; ; i++ {
live := initialCC.Read()
if live == 0 {
break
}
if i >= 100 {
t.Fatalf("%d Contexts still not finalized after %d GC cycles.", live, i)
}
doPosts(&flushCC)
runtime.GC()
}
}
// This used to crash; https://golang.org/issue/3266
func TestTransportIdleConnCrash(t *testing.T) {
defer afterTest(t)
var tr *Transport
unblockCh := make(chan bool, 1)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
<-unblockCh
tr.CloseIdleConnections()
}))
defer ts.Close()
c := ts.Client()
tr = c.Transport.(*Transport)
didreq := make(chan bool)
go func() {
res, err := c.Get(ts.URL)
if err != nil {
t.Error(err)
} else {
res.Body.Close() // returns idle conn
}
didreq <- true
}()
unblockCh <- true
<-didreq
}
// Test that the transport doesn't close the TCP connection early,
// before the response body has been read. This was a regression
// which sadly lacked a triggering test. The large response body made
// the old race easier to trigger.
func TestIssue3644(t *testing.T) {
defer afterTest(t)
const numFoos = 5000
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
w.Header().Set("Connection", "close")
for i := 0; i < numFoos; i++ {
w.Write([]byte("foo "))
}
}))
defer ts.Close()
c := ts.Client()
res, err := c.Get(ts.URL)
if err != nil {
t.Fatal(err)
}
defer res.Body.Close()
bs, err := io.ReadAll(res.Body)
if err != nil {
t.Fatal(err)
}
if len(bs) != numFoos*len("foo ") {
t.Errorf("unexpected response length")
}
}
// Test that a client receives a server's reply, even if the server doesn't read
// the entire request body.
func TestIssue3595(t *testing.T) {
setParallel(t)
defer afterTest(t)
const deniedMsg = "sorry, denied."
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
Error(w, deniedMsg, StatusUnauthorized)
}))
defer ts.Close()
c := ts.Client()
res, err := c.Post(ts.URL, "application/octet-stream", neverEnding('a'))
if err != nil {
t.Errorf("Post: %v", err)
return
}
got, err := io.ReadAll(res.Body)
if err != nil {
t.Fatalf("Body ReadAll: %v", err)
}
if !strings.Contains(string(got), deniedMsg) {
t.Errorf("Known bug: response %q does not contain %q", got, deniedMsg)
}
}
// From https://golang.org/issue/4454 ,
// "client fails to handle requests with no body and chunked encoding"
func TestChunkedNoContent(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
w.WriteHeader(StatusNoContent)
}))
defer ts.Close()
c := ts.Client()
for _, closeBody := range []bool{true, false} {
const n = 4
for i := 1; i <= n; i++ {
res, err := c.Get(ts.URL)
if err != nil {
t.Errorf("closingBody=%v, req %d/%d: %v", closeBody, i, n, err)
} else {
if closeBody {
res.Body.Close()
}
}
}
}
}
func TestTransportConcurrency(t *testing.T) {
// Not parallel: uses global test hooks.
defer afterTest(t)
maxProcs, numReqs := 16, 500
if testing.Short() {
maxProcs, numReqs = 4, 50
}
defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(maxProcs))
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
fmt.Fprintf(w, "%v", r.FormValue("echo"))
}))
defer ts.Close()
var wg sync.WaitGroup
wg.Add(numReqs)
// Due to the Transport's "socket late binding" (see
// idleConnCh in transport.go), the numReqs HTTP requests
// below can finish with a dial still outstanding. To keep
// the leak checker happy, keep track of pending dials and
// wait for them to finish (and be closed or returned to the
// idle pool) before we close idle connections.
SetPendingDialHooks(func() { wg.Add(1) }, wg.Done)
defer SetPendingDialHooks(nil, nil)
c := ts.Client()
reqs := make(chan string)
defer close(reqs)
for i := 0; i < maxProcs*2; i++ {
go func() {
for req := range reqs {
res, err := c.Get(ts.URL + "/?echo=" + req)
if err != nil {
if runtime.GOOS == "netbsd" && strings.HasSuffix(err.Error(), ": connection reset by peer") {
// https://go.dev/issue/52168: this test was observed to fail with
// ECONNRESET errors in Dial on various netbsd builders.
t.Logf("error on req %s: %v", req, err)
t.Logf("(see https://go.dev/issue/52168)")
} else {
t.Errorf("error on req %s: %v", req, err)
}
wg.Done()
continue
}
all, err := io.ReadAll(res.Body)
if err != nil {
t.Errorf("read error on req %s: %v", req, err)
} else if string(all) != req {
t.Errorf("body of req %s = %q; want %q", req, all, req)
}
res.Body.Close()
wg.Done()
}
}()
}
for i := 0; i < numReqs; i++ {
reqs <- fmt.Sprintf("request-%d", i)
}
wg.Wait()
}
func TestIssue4191_InfiniteGetTimeout(t *testing.T) {
setParallel(t)
defer afterTest(t)
const debug = false
mux := NewServeMux()
mux.HandleFunc("/get", func(w ResponseWriter, r *Request) {
io.Copy(w, neverEnding('a'))
})
ts := httptest.NewServer(mux)
defer ts.Close()
timeout := 100 * time.Millisecond
c := ts.Client()
c.Transport.(*Transport).Dial = func(n, addr string) (net.Conn, error) {
conn, err := net.Dial(n, addr)
if err != nil {
return nil, err
}
conn.SetDeadline(time.Now().Add(timeout))
if debug {
conn = NewLoggingConn("client", conn)
}
return conn, nil
}
getFailed := false
nRuns := 5
if testing.Short() {
nRuns = 1
}
for i := 0; i < nRuns; i++ {
if debug {
println("run", i+1, "of", nRuns)
}
sres, err := c.Get(ts.URL + "/get")
if err != nil {
if !getFailed {
// Make the timeout longer, once.
getFailed = true
t.Logf("increasing timeout")
i--
timeout *= 10
continue
}
t.Errorf("Error issuing GET: %v", err)
break
}
_, err = io.Copy(io.Discard, sres.Body)
if err == nil {
t.Errorf("Unexpected successful copy")
break
}
}
if debug {
println("tests complete; waiting for handlers to finish")
}
}
func TestIssue4191_InfiniteGetToPutTimeout(t *testing.T) {
setParallel(t)
defer afterTest(t)
const debug = false
mux := NewServeMux()
mux.HandleFunc("/get", func(w ResponseWriter, r *Request) {
io.Copy(w, neverEnding('a'))
})
mux.HandleFunc("/put", func(w ResponseWriter, r *Request) {
defer r.Body.Close()
io.Copy(io.Discard, r.Body)
})
ts := httptest.NewServer(mux)
timeout := 100 * time.Millisecond
c := ts.Client()
c.Transport.(*Transport).Dial = func(n, addr string) (net.Conn, error) {
conn, err := net.Dial(n, addr)
if err != nil {
return nil, err
}
conn.SetDeadline(time.Now().Add(timeout))
if debug {
conn = NewLoggingConn("client", conn)
}
return conn, nil
}
getFailed := false
nRuns := 5
if testing.Short() {
nRuns = 1
}
for i := 0; i < nRuns; i++ {
if debug {
println("run", i+1, "of", nRuns)
}
sres, err := c.Get(ts.URL + "/get")
if err != nil {
if !getFailed {
// Make the timeout longer, once.
getFailed = true
t.Logf("increasing timeout")
i--
timeout *= 10
continue
}
t.Errorf("Error issuing GET: %v", err)
break
}
req, _ := NewRequest("PUT", ts.URL+"/put", sres.Body)
_, err = c.Do(req)
if err == nil {
sres.Body.Close()
t.Errorf("Unexpected successful PUT")
break
}
sres.Body.Close()
}
if debug {
println("tests complete; waiting for handlers to finish")
}
ts.Close()
}
func TestTransportResponseHeaderTimeout(t *testing.T) {
setParallel(t)
defer afterTest(t)
if testing.Short() {
t.Skip("skipping timeout test in -short mode")
}
inHandler := make(chan bool, 1)
mux := NewServeMux()
mux.HandleFunc("/fast", func(w ResponseWriter, r *Request) {
inHandler <- true
})
mux.HandleFunc("/slow", func(w ResponseWriter, r *Request) {
inHandler <- true
time.Sleep(2 * time.Second)
})
ts := httptest.NewServer(mux)
defer ts.Close()
c := ts.Client()
c.Transport.(*Transport).ResponseHeaderTimeout = 500 * time.Millisecond
tests := []struct {
path string
want int
wantErr string
}{
{path: "/fast", want: 200},
{path: "/slow", wantErr: "timeout awaiting response headers"},
{path: "/fast", want: 200},
}
for i, tt := range tests {
req, _ := NewRequest("GET", ts.URL+tt.path, nil)
req = req.WithT(t)
res, err := c.Do(req)
select {
case <-inHandler:
case <-time.After(5 * time.Second):
t.Errorf("never entered handler for test index %d, %s", i, tt.path)
continue
}
if err != nil {
uerr, ok := err.(*url.Error)
if !ok {
t.Errorf("error is not an url.Error; got: %#v", err)
continue
}
nerr, ok := uerr.Err.(net.Error)
if !ok {
t.Errorf("error does not satisfy net.Error interface; got: %#v", err)
continue
}
if !nerr.Timeout() {
t.Errorf("want timeout error; got: %q", nerr)
continue
}
if strings.Contains(err.Error(), tt.wantErr) {
continue
}
t.Errorf("%d. unexpected error: %v", i, err)
continue
}
if tt.wantErr != "" {
t.Errorf("%d. no error. expected error: %v", i, tt.wantErr)
continue
}
if res.StatusCode != tt.want {
t.Errorf("%d for path %q status = %d; want %d", i, tt.path, res.StatusCode, tt.want)
}
}
}
func TestTransportCancelRequest(t *testing.T) {
setParallel(t)
defer afterTest(t)
if testing.Short() {
t.Skip("skipping test in -short mode")
}
unblockc := make(chan bool)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
fmt.Fprintf(w, "Hello")
w.(Flusher).Flush() // send headers and some body
<-unblockc
}))
defer ts.Close()
defer close(unblockc)
c := ts.Client()
tr := c.Transport.(*Transport)
req, _ := NewRequest("GET", ts.URL, nil)
res, err := c.Do(req)
if err != nil {
t.Fatal(err)
}
go func() {
time.Sleep(1 * time.Second)
tr.CancelRequest(req)
}()
t0 := time.Now()
body, err := io.ReadAll(res.Body)
d := time.Since(t0)
if err != ExportErrRequestCanceled {
t.Errorf("Body.Read error = %v; want errRequestCanceled", err)
}
if string(body) != "Hello" {
t.Errorf("Body = %q; want Hello", body)
}
if d < 500*time.Millisecond {
t.Errorf("expected ~1 second delay; got %v", d)
}
// Verify no outstanding requests after readLoop/writeLoop
// goroutines shut down.
for tries := 5; tries > 0; tries-- {
n := tr.NumPendingRequestsForTesting()
if n == 0 {
break
}
time.Sleep(100 * time.Millisecond)
if tries == 1 {
t.Errorf("pending requests = %d; want 0", n)
}
}
}
func testTransportCancelRequestInDo(t *testing.T, body io.Reader) {
setParallel(t)
defer afterTest(t)
if testing.Short() {
t.Skip("skipping test in -short mode")
}
unblockc := make(chan bool)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
<-unblockc
}))
defer ts.Close()
defer close(unblockc)
c := ts.Client()
tr := c.Transport.(*Transport)
donec := make(chan bool)
req, _ := NewRequest("GET", ts.URL, body)
go func() {
defer close(donec)
c.Do(req)
}()
start := time.Now()
timeout := 10 * time.Second
for time.Since(start) < timeout {
time.Sleep(100 * time.Millisecond)
tr.CancelRequest(req)
select {
case <-donec:
return
default:
}
}
t.Errorf("Do of canceled request has not returned after %v", timeout)
}
func TestTransportCancelRequestInDo(t *testing.T) {
testTransportCancelRequestInDo(t, nil)
}
func TestTransportCancelRequestWithBodyInDo(t *testing.T) {
testTransportCancelRequestInDo(t, bytes.NewBuffer([]byte{0}))
}
func TestTransportCancelRequestInDial(t *testing.T) {
defer afterTest(t)
if testing.Short() {
t.Skip("skipping test in -short mode")
}
var logbuf bytes.Buffer
eventLog := log.New(&logbuf, "", 0)
unblockDial := make(chan bool)
defer close(unblockDial)
inDial := make(chan bool)
tr := &Transport{
Dial: func(network, addr string) (net.Conn, error) {
eventLog.Println("dial: blocking")
if !<-inDial {
return nil, errors.New("main Test goroutine exited")
}
<-unblockDial
return nil, errors.New("nope")
},
}
cl := &Client{Transport: tr}
gotres := make(chan bool)
req, _ := NewRequest("GET", "http://something.no-network.tld/", nil)
go func() {
_, err := cl.Do(req)
eventLog.Printf("Get = %v", err)
gotres <- true
}()
select {
case inDial <- true:
case <-time.After(5 * time.Second):
close(inDial)
t.Fatal("timeout; never saw blocking dial")
}
eventLog.Printf("canceling")
tr.CancelRequest(req)
tr.CancelRequest(req) // used to panic on second call
select {
case <-gotres:
case <-time.After(5 * time.Second):
panic("hang. events are: " + logbuf.String())
}
got := logbuf.String()
want := `dial: blocking
canceling
Get = Get "http://something.no-network.tld/": net/http: request canceled while waiting for connection
`
if got != want {
t.Errorf("Got events:\n%s\nWant:\n%s", got, want)
}
}
func TestCancelRequestWithChannel(t *testing.T) {
setParallel(t)
defer afterTest(t)
if testing.Short() {
t.Skip("skipping test in -short mode")
}
unblockc := make(chan bool)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
fmt.Fprintf(w, "Hello")
w.(Flusher).Flush() // send headers and some body
<-unblockc
}))
defer ts.Close()
defer close(unblockc)
c := ts.Client()
tr := c.Transport.(*Transport)
req, _ := NewRequest("GET", ts.URL, nil)
ch := make(chan struct{})
req.Cancel = ch
res, err := c.Do(req)
if err != nil {
t.Fatal(err)
}
go func() {
time.Sleep(1 * time.Second)
close(ch)
}()
t0 := time.Now()
body, err := io.ReadAll(res.Body)
d := time.Since(t0)
if err != ExportErrRequestCanceled {
t.Errorf("Body.Read error = %v; want errRequestCanceled", err)
}
if string(body) != "Hello" {
t.Errorf("Body = %q; want Hello", body)
}
if d < 500*time.Millisecond {
t.Errorf("expected ~1 second delay; got %v", d)
}
// Verify no outstanding requests after readLoop/writeLoop
// goroutines shut down.
for tries := 5; tries > 0; tries-- {
n := tr.NumPendingRequestsForTesting()
if n == 0 {
break
}
time.Sleep(100 * time.Millisecond)
if tries == 1 {
t.Errorf("pending requests = %d; want 0", n)
}
}
}
func TestCancelRequestWithChannelBeforeDo_Cancel(t *testing.T) {
testCancelRequestWithChannelBeforeDo(t, false)
}
func TestCancelRequestWithChannelBeforeDo_Context(t *testing.T) {
testCancelRequestWithChannelBeforeDo(t, true)
}
func testCancelRequestWithChannelBeforeDo(t *testing.T, withCtx bool) {
setParallel(t)
defer afterTest(t)
unblockc := make(chan bool)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
<-unblockc
}))
defer ts.Close()
defer close(unblockc)
c := ts.Client()
req, _ := NewRequest("GET", ts.URL, nil)
if withCtx {
ctx, cancel := context.WithCancel(context.Background())
cancel()
req = req.WithContext(ctx)
} else {
ch := make(chan struct{})
req.Cancel = ch
close(ch)
}
_, err := c.Do(req)
if ue, ok := err.(*url.Error); ok {
err = ue.Err
}
if withCtx {
if err != context.Canceled {
t.Errorf("Do error = %v; want %v", err, context.Canceled)
}
} else {
if err == nil || !strings.Contains(err.Error(), "canceled") {
t.Errorf("Do error = %v; want cancellation", err)
}
}
}
// Issue 11020. The returned error message should be errRequestCanceled
func TestTransportCancelBeforeResponseHeaders(t *testing.T) {
defer afterTest(t)
serverConnCh := make(chan net.Conn, 1)
tr := &Transport{
Dial: func(network, addr string) (net.Conn, error) {
cc, sc := net.Pipe()
serverConnCh <- sc
return cc, nil
},
}
defer tr.CloseIdleConnections()
errc := make(chan error, 1)
req, _ := NewRequest("GET", "http://example.com/", nil)
go func() {
_, err := tr.RoundTrip(req)
errc <- err
}()
sc := <-serverConnCh
verb := make([]byte, 3)
if _, err := io.ReadFull(sc, verb); err != nil {
t.Errorf("Error reading HTTP verb from server: %v", err)
}
if string(verb) != "GET" {
t.Errorf("server received %q; want GET", verb)
}
defer sc.Close()
tr.CancelRequest(req)
err := <-errc
if err == nil {
t.Fatalf("unexpected success from RoundTrip")
}
if err != ExportErrRequestCanceled {
t.Errorf("RoundTrip error = %v; want ExportErrRequestCanceled", err)
}
}
// golang.org/issue/3672 -- Client can't close HTTP stream
// Calling Close on a Response.Body used to just read until EOF.
// Now it actually closes the TCP connection.
func TestTransportCloseResponseBody(t *testing.T) {
defer afterTest(t)
writeErr := make(chan error, 1)
msg := []byte("young\n")
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
for {
_, err := w.Write(msg)
if err != nil {
writeErr <- err
return
}
w.(Flusher).Flush()
}
}))
defer ts.Close()
c := ts.Client()
tr := c.Transport.(*Transport)
req, _ := NewRequest("GET", ts.URL, nil)
defer tr.CancelRequest(req)
res, err := c.Do(req)
if err != nil {
t.Fatal(err)
}
const repeats = 3
buf := make([]byte, len(msg)*repeats)
want := bytes.Repeat(msg, repeats)
_, err = io.ReadFull(res.Body, buf)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(buf, want) {
t.Fatalf("read %q; want %q", buf, want)
}
didClose := make(chan error, 1)
go func() {
didClose <- res.Body.Close()
}()
select {
case err := <-didClose:
if err != nil {
t.Errorf("Close = %v", err)
}
case <-time.After(10 * time.Second):
t.Fatal("too long waiting for close")
}
select {
case err := <-writeErr:
if err == nil {
t.Errorf("expected non-nil write error")
}
case <-time.After(10 * time.Second):
t.Fatal("too long waiting for write error")
}
}
type fooProto struct{}
func (fooProto) RoundTrip(req *Request) (*Response, error) {
res := &Response{
Status: "200 OK",
StatusCode: 200,
Header: make(Header),
Body: io.NopCloser(strings.NewReader("You wanted " + req.URL.String())),
}
return res, nil
}
func TestTransportAltProto(t *testing.T) {
defer afterTest(t)
tr := &Transport{}
c := &Client{Transport: tr}
tr.RegisterProtocol("foo", fooProto{})
res, err := c.Get("foo://bar.com/path")
if err != nil {
t.Fatal(err)
}
bodyb, err := io.ReadAll(res.Body)
if err != nil {
t.Fatal(err)
}
body := string(bodyb)
if e := "You wanted foo://bar.com/path"; body != e {
t.Errorf("got response %q, want %q", body, e)
}
}
func TestTransportNoHost(t *testing.T) {
defer afterTest(t)
tr := &Transport{}
_, err := tr.RoundTrip(&Request{
Header: make(Header),
URL: &url.URL{
Scheme: "http",
},
})
want := "http: no Host in request URL"
if got := fmt.Sprint(err); got != want {
t.Errorf("error = %v; want %q", err, want)
}
}
// Issue 13311
func TestTransportEmptyMethod(t *testing.T) {
req, _ := NewRequest("GET", "http://foo.com/", nil)
req.Method = "" // docs say "For client requests an empty string means GET"
got, err := httputil.DumpRequestOut(req, false) // DumpRequestOut uses Transport
if err != nil {
t.Fatal(err)
}
if !strings.Contains(string(got), "GET ") {
t.Fatalf("expected substring 'GET '; got: %s", got)
}
}
func TestTransportSocketLateBinding(t *testing.T) {
setParallel(t)
defer afterTest(t)
mux := NewServeMux()
fooGate := make(chan bool, 1)
mux.HandleFunc("/foo", func(w ResponseWriter, r *Request) {
w.Header().Set("foo-ipport", r.RemoteAddr)
w.(Flusher).Flush()
<-fooGate
})
mux.HandleFunc("/bar", func(w ResponseWriter, r *Request) {
w.Header().Set("bar-ipport", r.RemoteAddr)
})
ts := httptest.NewServer(mux)
defer ts.Close()
dialGate := make(chan bool, 1)
c := ts.Client()
c.Transport.(*Transport).Dial = func(n, addr string) (net.Conn, error) {
if <-dialGate {
return net.Dial(n, addr)
}
return nil, errors.New("manually closed")
}
dialGate <- true // only allow one dial
fooRes, err := c.Get(ts.URL + "/foo")
if err != nil {
t.Fatal(err)
}
fooAddr := fooRes.Header.Get("foo-ipport")
if fooAddr == "" {
t.Fatal("No addr on /foo request")
}
time.AfterFunc(200*time.Millisecond, func() {
// let the foo response finish so we can use its
// connection for /bar
fooGate <- true
io.Copy(io.Discard, fooRes.Body)
fooRes.Body.Close()
})
barRes, err := c.Get(ts.URL + "/bar")
if err != nil {
t.Fatal(err)
}
barAddr := barRes.Header.Get("bar-ipport")
if barAddr != fooAddr {
t.Fatalf("/foo came from conn %q; /bar came from %q instead", fooAddr, barAddr)
}
barRes.Body.Close()
dialGate <- false
}
// Issue 2184
func TestTransportReading100Continue(t *testing.T) {
defer afterTest(t)
const numReqs = 5
reqBody := func(n int) string { return fmt.Sprintf("request body %d", n) }
reqID := func(n int) string { return fmt.Sprintf("REQ-ID-%d", n) }
send100Response := func(w *io.PipeWriter, r *io.PipeReader) {
defer w.Close()
defer r.Close()
br := bufio.NewReader(r)
n := 0
for {
n++
req, err := ReadRequest(br)
if err == io.EOF {
return
}
if err != nil {
t.Error(err)
return
}
slurp, err := io.ReadAll(req.Body)
if err != nil {
t.Errorf("Server request body slurp: %v", err)
return
}
id := req.Header.Get("Request-Id")
resCode := req.Header.Get("X-Want-Response-Code")
if resCode == "" {
resCode = "100 Continue"
if string(slurp) != reqBody(n) {
t.Errorf("Server got %q, %v; want %q", slurp, err, reqBody(n))
}
}
body := fmt.Sprintf("Response number %d", n)
v := []byte(strings.Replace(fmt.Sprintf(`HTTP/1.1 %s
Date: Thu, 28 Feb 2013 17:55:41 GMT
HTTP/1.1 200 OK
Content-Type: text/html
Echo-Request-Id: %s
Content-Length: %d
%s`, resCode, id, len(body), body), "\n", "\r\n", -1))
w.Write(v)
if id == reqID(numReqs) {
return
}
}
}
tr := &Transport{
Dial: func(n, addr string) (net.Conn, error) {
sr, sw := io.Pipe() // server read/write
cr, cw := io.Pipe() // client read/write
conn := &rwTestConn{
Reader: cr,
Writer: sw,
closeFunc: func() error {
sw.Close()
cw.Close()
return nil
},
}
go send100Response(cw, sr)
return conn, nil
},
DisableKeepAlives: false,
}
defer tr.CloseIdleConnections()
c := &Client{Transport: tr}
testResponse := func(req *Request, name string, wantCode int) {
t.Helper()
res, err := c.Do(req)
if err != nil {
t.Fatalf("%s: Do: %v", name, err)
}
if res.StatusCode != wantCode {
t.Fatalf("%s: Response Statuscode=%d; want %d", name, res.StatusCode, wantCode)
}
if id, idBack := req.Header.Get("Request-Id"), res.Header.Get("Echo-Request-Id"); id != "" && id != idBack {
t.Errorf("%s: response id %q != request id %q", name, idBack, id)
}
_, err = io.ReadAll(res.Body)
if err != nil {
t.Fatalf("%s: Slurp error: %v", name, err)
}
}
// Few 100 responses, making sure we're not off-by-one.
for i := 1; i <= numReqs; i++ {
req, _ := NewRequest("POST", "http://dummy.tld/", strings.NewReader(reqBody(i)))
req.Header.Set("Request-Id", reqID(i))
testResponse(req, fmt.Sprintf("100, %d/%d", i, numReqs), 200)
}
}
// Issue 17739: the HTTP client must ignore any unknown 1xx
// informational responses before the actual response.
func TestTransportIgnore1xxResponses(t *testing.T) {
setParallel(t)
defer afterTest(t)
cst := newClientServerTest(t, h1Mode, HandlerFunc(func(w ResponseWriter, r *Request) {
conn, buf, _ := w.(Hijacker).Hijack()
buf.Write([]byte("HTTP/1.1 123 OneTwoThree\r\nFoo: bar\r\n\r\nHTTP/1.1 200 OK\r\nBar: baz\r\nContent-Length: 5\r\n\r\nHello"))
buf.Flush()
conn.Close()
}))
defer cst.close()
cst.tr.DisableKeepAlives = true // prevent log spam; our test server is hanging up anyway
var got bytes.Buffer
req, _ := NewRequest("GET", cst.ts.URL, nil)
req = req.WithContext(httptrace.WithClientTrace(context.Background(), &httptrace.ClientTrace{
Got1xxResponse: func(code int, header textproto.MIMEHeader) error {
fmt.Fprintf(&got, "1xx: code=%v, header=%v\n", code, header)
return nil
},
}))
res, err := cst.c.Do(req)
if err != nil {
t.Fatal(err)
}
defer res.Body.Close()
res.Write(&got)
want := "1xx: code=123, header=map[Foo:[bar]]\nHTTP/1.1 200 OK\r\nContent-Length: 5\r\nBar: baz\r\n\r\nHello"
if got.String() != want {
t.Errorf(" got: %q\nwant: %q\n", got.Bytes(), want)
}
}
func TestTransportLimits1xxResponses(t *testing.T) {
setParallel(t)
defer afterTest(t)
cst := newClientServerTest(t, h1Mode, HandlerFunc(func(w ResponseWriter, r *Request) {
conn, buf, _ := w.(Hijacker).Hijack()
for i := 0; i < 10; i++ {
buf.Write([]byte("HTTP/1.1 123 OneTwoThree\r\n\r\n"))
}
buf.Write([]byte("HTTP/1.1 204 No Content\r\n\r\n"))
buf.Flush()
conn.Close()
}))
defer cst.close()
cst.tr.DisableKeepAlives = true // prevent log spam; our test server is hanging up anyway
res, err := cst.c.Get(cst.ts.URL)
if res != nil {
defer res.Body.Close()
}
got := fmt.Sprint(err)
wantSub := "too many 1xx informational responses"
if !strings.Contains(got, wantSub) {
t.Errorf("Get error = %v; want substring %q", err, wantSub)
}
}
// Issue 26161: the HTTP client must treat 101 responses
// as the final response.
func TestTransportTreat101Terminal(t *testing.T) {
setParallel(t)
defer afterTest(t)
cst := newClientServerTest(t, h1Mode, HandlerFunc(func(w ResponseWriter, r *Request) {
conn, buf, _ := w.(Hijacker).Hijack()
buf.Write([]byte("HTTP/1.1 101 Switching Protocols\r\n\r\n"))
buf.Write([]byte("HTTP/1.1 204 No Content\r\n\r\n"))
buf.Flush()
conn.Close()
}))
defer cst.close()
res, err := cst.c.Get(cst.ts.URL)
if err != nil {
t.Fatal(err)
}
defer res.Body.Close()
if res.StatusCode != StatusSwitchingProtocols {
t.Errorf("StatusCode = %v; want 101 Switching Protocols", res.StatusCode)
}
}
type proxyFromEnvTest struct {
req string // URL to fetch; blank means "http://example.com"
env string // HTTP_PROXY
httpsenv string // HTTPS_PROXY
noenv string // NO_PROXY
reqmeth string // REQUEST_METHOD
want string
wanterr error
}
func (t proxyFromEnvTest) String() string {
var buf bytes.Buffer
space := func() {
if buf.Len() > 0 {
buf.WriteByte(' ')
}
}
if t.env != "" {
fmt.Fprintf(&buf, "http_proxy=%q", t.env)
}
if t.httpsenv != "" {
space()
fmt.Fprintf(&buf, "https_proxy=%q", t.httpsenv)
}
if t.noenv != "" {
space()
fmt.Fprintf(&buf, "no_proxy=%q", t.noenv)
}
if t.reqmeth != "" {
space()
fmt.Fprintf(&buf, "request_method=%q", t.reqmeth)
}
req := "http://example.com"
if t.req != "" {
req = t.req
}
space()
fmt.Fprintf(&buf, "req=%q", req)
return strings.TrimSpace(buf.String())
}
var proxyFromEnvTests = []proxyFromEnvTest{
{env: "127.0.0.1:8080", want: "http://127.0.0.1:8080"},
{env: "cache.corp.example.com:1234", want: "http://cache.corp.example.com:1234"},
{env: "cache.corp.example.com", want: "http://cache.corp.example.com"},
{env: "https://cache.corp.example.com", want: "https://cache.corp.example.com"},
{env: "http://127.0.0.1:8080", want: "http://127.0.0.1:8080"},
{env: "https://127.0.0.1:8080", want: "https://127.0.0.1:8080"},
{env: "socks5://127.0.0.1", want: "socks5://127.0.0.1"},
// Don't use secure for http
{req: "http://insecure.tld/", env: "http.proxy.tld", httpsenv: "secure.proxy.tld", want: "http://http.proxy.tld"},
// Use secure for https.
{req: "https://secure.tld/", env: "http.proxy.tld", httpsenv: "secure.proxy.tld", want: "http://secure.proxy.tld"},
{req: "https://secure.tld/", env: "http.proxy.tld", httpsenv: "https://secure.proxy.tld", want: "https://secure.proxy.tld"},
// Issue 16405: don't use HTTP_PROXY in a CGI environment,
// where HTTP_PROXY can be attacker-controlled.
{env: "http://10.1.2.3:8080", reqmeth: "POST",
want: "<nil>",
wanterr: errors.New("refusing to use HTTP_PROXY value in CGI environment; see golang.org/s/cgihttpproxy")},
{want: "<nil>"},
{noenv: "example.com", req: "http://example.com/", env: "proxy", want: "<nil>"},
{noenv: ".example.com", req: "http://example.com/", env: "proxy", want: "http://proxy"},
{noenv: "ample.com", req: "http://example.com/", env: "proxy", want: "http://proxy"},
{noenv: "example.com", req: "http://foo.example.com/", env: "proxy", want: "<nil>"},
{noenv: ".foo.com", req: "http://example.com/", env: "proxy", want: "http://proxy"},
}
func testProxyForRequest(t *testing.T, tt proxyFromEnvTest, proxyForRequest func(req *Request) (*url.URL, error)) {
t.Helper()
reqURL := tt.req
if reqURL == "" {
reqURL = "http://example.com"
}
req, _ := NewRequest("GET", reqURL, nil)
url, err := proxyForRequest(req)
if g, e := fmt.Sprintf("%v", err), fmt.Sprintf("%v", tt.wanterr); g != e {
t.Errorf("%v: got error = %q, want %q", tt, g, e)
return
}
if got := fmt.Sprintf("%s", url); got != tt.want {
t.Errorf("%v: got URL = %q, want %q", tt, url, tt.want)
}
}
func TestProxyFromEnvironment(t *testing.T) {
ResetProxyEnv()
defer ResetProxyEnv()
for _, tt := range proxyFromEnvTests {
testProxyForRequest(t, tt, func(req *Request) (*url.URL, error) {
os.Setenv("HTTP_PROXY", tt.env)
os.Setenv("HTTPS_PROXY", tt.httpsenv)
os.Setenv("NO_PROXY", tt.noenv)
os.Setenv("REQUEST_METHOD", tt.reqmeth)
ResetCachedEnvironment()
return ProxyFromEnvironment(req)
})
}
}
func TestProxyFromEnvironmentLowerCase(t *testing.T) {
ResetProxyEnv()
defer ResetProxyEnv()
for _, tt := range proxyFromEnvTests {
testProxyForRequest(t, tt, func(req *Request) (*url.URL, error) {
os.Setenv("http_proxy", tt.env)
os.Setenv("https_proxy", tt.httpsenv)
os.Setenv("no_proxy", tt.noenv)
os.Setenv("REQUEST_METHOD", tt.reqmeth)
ResetCachedEnvironment()
return ProxyFromEnvironment(req)
})
}
}
func TestIdleConnChannelLeak(t *testing.T) {
// Not parallel: uses global test hooks.
var mu sync.Mutex
var n int
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
mu.Lock()
n++
mu.Unlock()
}))
defer ts.Close()
const nReqs = 5
didRead := make(chan bool, nReqs)
SetReadLoopBeforeNextReadHook(func() { didRead <- true })
defer SetReadLoopBeforeNextReadHook(nil)
c := ts.Client()
tr := c.Transport.(*Transport)
tr.Dial = func(netw, addr string) (net.Conn, error) {
return net.Dial(netw, ts.Listener.Addr().String())
}
// First, without keep-alives.
for _, disableKeep := range []bool{true, false} {
tr.DisableKeepAlives = disableKeep
for i := 0; i < nReqs; i++ {
_, err := c.Get(fmt.Sprintf("http://foo-host-%d.tld/", i))
if err != nil {
t.Fatal(err)
}
// Note: no res.Body.Close is needed here, since the
// response Content-Length is zero. Perhaps the test
// should be more explicit and use a HEAD, but tests
// elsewhere guarantee that zero byte responses generate
// a "Content-Length: 0" instead of chunking.
}
// At this point, each of the 5 Transport.readLoop goroutines
// are scheduling noting that there are no response bodies (see
// earlier comment), and are then calling putIdleConn, which
// decrements this count. Usually that happens quickly, which is
// why this test has seemed to work for ages. But it's still
// racey: we have wait for them to finish first. See Issue 10427
for i := 0; i < nReqs; i++ {
<-didRead
}
if got := tr.IdleConnWaitMapSizeForTesting(); got != 0 {
t.Fatalf("for DisableKeepAlives = %v, map size = %d; want 0", disableKeep, got)
}
}
}
// Verify the status quo: that the Client.Post function coerces its
// body into a ReadCloser if it's a Closer, and that the Transport
// then closes it.
func TestTransportClosesRequestBody(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
io.Copy(io.Discard, r.Body)
}))
defer ts.Close()
c := ts.Client()
closes := 0
res, err := c.Post(ts.URL, "text/plain", countCloseReader{&closes, strings.NewReader("hello")})
if err != nil {
t.Fatal(err)
}
res.Body.Close()
if closes != 1 {
t.Errorf("closes = %d; want 1", closes)
}
}
func TestTransportTLSHandshakeTimeout(t *testing.T) {
defer afterTest(t)
if testing.Short() {
t.Skip("skipping in short mode")
}
ln := newLocalListener(t)
defer ln.Close()
testdonec := make(chan struct{})
defer close(testdonec)
go func() {
c, err := ln.Accept()
if err != nil {
t.Error(err)
return
}
<-testdonec
c.Close()
}()
getdonec := make(chan struct{})
go func() {
defer close(getdonec)
tr := &Transport{
Dial: func(_, _ string) (net.Conn, error) {
return net.Dial("tcp", ln.Addr().String())
},
TLSHandshakeTimeout: 250 * time.Millisecond,
}
cl := &Client{Transport: tr}
_, err := cl.Get("https://dummy.tld/")
if err == nil {
t.Error("expected error")
return
}
ue, ok := err.(*url.Error)
if !ok {
t.Errorf("expected url.Error; got %#v", err)
return
}
ne, ok := ue.Err.(net.Error)
if !ok {
t.Errorf("expected net.Error; got %#v", err)
return
}
if !ne.Timeout() {
t.Errorf("expected timeout error; got %v", err)
}
if !strings.Contains(err.Error(), "handshake timeout") {
t.Errorf("expected 'handshake timeout' in error; got %v", err)
}
}()
select {
case <-getdonec:
case <-time.After(5 * time.Second):
t.Error("test timeout; TLS handshake hung?")
}
}
// Trying to repro golang.org/issue/3514
func TestTLSServerClosesConnection(t *testing.T) {
defer afterTest(t)
closedc := make(chan bool, 1)
ts := httptest.NewTLSServer(HandlerFunc(func(w ResponseWriter, r *Request) {
if strings.Contains(r.URL.Path, "/keep-alive-then-die") {
conn, _, _ := w.(Hijacker).Hijack()
conn.Write([]byte("HTTP/1.1 200 OK\r\nContent-Length: 3\r\n\r\nfoo"))
conn.Close()
closedc <- true
return
}
fmt.Fprintf(w, "hello")
}))
defer ts.Close()
c := ts.Client()
tr := c.Transport.(*Transport)
var nSuccess = 0
var errs []error
const trials = 20
for i := 0; i < trials; i++ {
tr.CloseIdleConnections()
res, err := c.Get(ts.URL + "/keep-alive-then-die")
if err != nil {
t.Fatal(err)
}
<-closedc
slurp, err := io.ReadAll(res.Body)
if err != nil {
t.Fatal(err)
}
if string(slurp) != "foo" {
t.Errorf("Got %q, want foo", slurp)
}
// Now try again and see if we successfully
// pick a new connection.
res, err = c.Get(ts.URL + "/")
if err != nil {
errs = append(errs, err)
continue
}
slurp, err = io.ReadAll(res.Body)
if err != nil {
errs = append(errs, err)
continue
}
nSuccess++
}
if nSuccess > 0 {
t.Logf("successes = %d of %d", nSuccess, trials)
} else {
t.Errorf("All runs failed:")
}
for _, err := range errs {
t.Logf(" err: %v", err)
}
}
// byteFromChanReader is an io.Reader that reads a single byte at a
// time from the channel. When the channel is closed, the reader
// returns io.EOF.
type byteFromChanReader chan byte
func (c byteFromChanReader) Read(p []byte) (n int, err error) {
if len(p) == 0 {
return
}
b, ok := <-c
if !ok {
return 0, io.EOF
}
p[0] = b
return 1, nil
}
// Verifies that the Transport doesn't reuse a connection in the case
// where the server replies before the request has been fully
// written. We still honor that reply (see TestIssue3595), but don't
// send future requests on the connection because it's then in a
// questionable state.
// golang.org/issue/7569
func TestTransportNoReuseAfterEarlyResponse(t *testing.T) {
setParallel(t)
defer afterTest(t)
var sconn struct {
sync.Mutex
c net.Conn
}
var getOkay bool
closeConn := func() {
sconn.Lock()
defer sconn.Unlock()
if sconn.c != nil {
sconn.c.Close()
sconn.c = nil
if !getOkay {
t.Logf("Closed server connection")
}
}
}
defer closeConn()
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
if r.Method == "GET" {
io.WriteString(w, "bar")
return
}
conn, _, _ := w.(Hijacker).Hijack()
sconn.Lock()
sconn.c = conn
sconn.Unlock()
conn.Write([]byte("HTTP/1.1 200 OK\r\nContent-Length: 3\r\n\r\nfoo")) // keep-alive
go io.Copy(io.Discard, conn)
}))
defer ts.Close()
c := ts.Client()
const bodySize = 256 << 10
finalBit := make(byteFromChanReader, 1)
req, _ := NewRequest("POST", ts.URL, io.MultiReader(io.LimitReader(neverEnding('x'), bodySize-1), finalBit))
req.ContentLength = bodySize
res, err := c.Do(req)
if err := wantBody(res, err, "foo"); err != nil {
t.Errorf("POST response: %v", err)
}
donec := make(chan bool)
go func() {
defer close(donec)
res, err = c.Get(ts.URL)
if err := wantBody(res, err, "bar"); err != nil {
t.Errorf("GET response: %v", err)
return
}
getOkay = true // suppress test noise
}()
time.AfterFunc(5*time.Second, closeConn)
select {
case <-donec:
finalBit <- 'x' // unblock the writeloop of the first Post
close(finalBit)
case <-time.After(7 * time.Second):
t.Fatal("timeout waiting for GET request to finish")
}
}
// Tests that we don't leak Transport persistConn.readLoop goroutines
// when a server hangs up immediately after saying it would keep-alive.
func TestTransportIssue10457(t *testing.T) {
defer afterTest(t) // used to fail in goroutine leak check
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
// Send a response with no body, keep-alive
// (implicit), and then lie and immediately close the
// connection. This forces the Transport's readLoop to
// immediately Peek an io.EOF and get to the point
// that used to hang.
conn, _, _ := w.(Hijacker).Hijack()
conn.Write([]byte("HTTP/1.1 200 OK\r\nFoo: Bar\r\nContent-Length: 0\r\n\r\n")) // keep-alive
conn.Close()
}))
defer ts.Close()
c := ts.Client()
res, err := c.Get(ts.URL)
if err != nil {
t.Fatalf("Get: %v", err)
}
defer res.Body.Close()
// Just a sanity check that we at least get the response. The real
// test here is that the "defer afterTest" above doesn't find any
// leaked goroutines.
if got, want := res.Header.Get("Foo"), "Bar"; got != want {
t.Errorf("Foo header = %q; want %q", got, want)
}
}
type closerFunc func() error
func (f closerFunc) Close() error { return f() }
type writerFuncConn struct {
net.Conn
write func(p []byte) (n int, err error)
}
func (c writerFuncConn) Write(p []byte) (n int, err error) { return c.write(p) }
// Issues 4677, 18241, and 17844. If we try to reuse a connection that the
// server is in the process of closing, we may end up successfully writing out
// our request (or a portion of our request) only to find a connection error
// when we try to read from (or finish writing to) the socket.
//
// NOTE: we resend a request only if:
// - we reused a keep-alive connection
// - we haven't yet received any header data
// - either we wrote no bytes to the server, or the request is idempotent
//
// This automatically prevents an infinite resend loop because we'll run out of
// the cached keep-alive connections eventually.
func TestRetryRequestsOnError(t *testing.T) {
newRequest := func(method, urlStr string, body io.Reader) *Request {
req, err := NewRequest(method, urlStr, body)
if err != nil {
t.Fatal(err)
}
return req
}
testCases := []struct {
name string
failureN int
failureErr error
// Note that we can't just re-use the Request object across calls to c.Do
// because we need to rewind Body between calls. (GetBody is only used to
// rewind Body on failure and redirects, not just because it's done.)
req func() *Request
reqString string
}{
{
name: "IdempotentNoBodySomeWritten",
// Believe that we've written some bytes to the server, so we know we're
// not just in the "retry when no bytes sent" case".
failureN: 1,
// Use the specific error that shouldRetryRequest looks for with idempotent requests.
failureErr: ExportErrServerClosedIdle,
req: func() *Request {
return newRequest("GET", "http://fake.golang", nil)
},
reqString: `GET / HTTP/1.1\r\nHost: fake.golang\r\nUser-Agent: Go-http-client/1.1\r\nAccept-Encoding: gzip\r\n\r\n`,
},
{
name: "IdempotentGetBodySomeWritten",
// Believe that we've written some bytes to the server, so we know we're
// not just in the "retry when no bytes sent" case".
failureN: 1,
// Use the specific error that shouldRetryRequest looks for with idempotent requests.
failureErr: ExportErrServerClosedIdle,
req: func() *Request {
return newRequest("GET", "http://fake.golang", strings.NewReader("foo\n"))
},
reqString: `GET / HTTP/1.1\r\nHost: fake.golang\r\nUser-Agent: Go-http-client/1.1\r\nContent-Length: 4\r\nAccept-Encoding: gzip\r\n\r\nfoo\n`,
},
{
name: "NothingWrittenNoBody",
// It's key that we return 0 here -- that's what enables Transport to know
// that nothing was written, even though this is a non-idempotent request.
failureN: 0,
failureErr: errors.New("second write fails"),
req: func() *Request {
return newRequest("DELETE", "http://fake.golang", nil)
},
reqString: `DELETE / HTTP/1.1\r\nHost: fake.golang\r\nUser-Agent: Go-http-client/1.1\r\nAccept-Encoding: gzip\r\n\r\n`,
},
{
name: "NothingWrittenGetBody",
// It's key that we return 0 here -- that's what enables Transport to know
// that nothing was written, even though this is a non-idempotent request.
failureN: 0,
failureErr: errors.New("second write fails"),
// Note that NewRequest will set up GetBody for strings.Reader, which is
// required for the retry to occur
req: func() *Request {
return newRequest("POST", "http://fake.golang", strings.NewReader("foo\n"))
},
reqString: `POST / HTTP/1.1\r\nHost: fake.golang\r\nUser-Agent: Go-http-client/1.1\r\nContent-Length: 4\r\nAccept-Encoding: gzip\r\n\r\nfoo\n`,
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
defer afterTest(t)
var (
mu sync.Mutex
logbuf bytes.Buffer
)
logf := func(format string, args ...any) {
mu.Lock()
defer mu.Unlock()
fmt.Fprintf(&logbuf, format, args...)
logbuf.WriteByte('\n')
}
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
logf("Handler")
w.Header().Set("X-Status", "ok")
}))
defer ts.Close()
var writeNumAtomic int32
c := ts.Client()
c.Transport.(*Transport).Dial = func(network, addr string) (net.Conn, error) {
logf("Dial")
c, err := net.Dial(network, ts.Listener.Addr().String())
if err != nil {
logf("Dial error: %v", err)
return nil, err
}
return &writerFuncConn{
Conn: c,
write: func(p []byte) (n int, err error) {
if atomic.AddInt32(&writeNumAtomic, 1) == 2 {
logf("intentional write failure")
return tc.failureN, tc.failureErr
}
logf("Write(%q)", p)
return c.Write(p)
},
}, nil
}
SetRoundTripRetried(func() {
logf("Retried.")
})
defer SetRoundTripRetried(nil)
for i := 0; i < 3; i++ {
t0 := time.Now()
req := tc.req()
res, err := c.Do(req)
if err != nil {
if time.Since(t0) < MaxWriteWaitBeforeConnReuse/2 {
mu.Lock()
got := logbuf.String()
mu.Unlock()
t.Fatalf("i=%d: Do = %v; log:\n%s", i, err, got)
}
t.Skipf("connection likely wasn't recycled within %d, interfering with actual test; skipping", MaxWriteWaitBeforeConnReuse)
}
res.Body.Close()
if res.Request != req {
t.Errorf("Response.Request != original request; want identical Request")
}
}
mu.Lock()
got := logbuf.String()
mu.Unlock()
want := fmt.Sprintf(`Dial
Write("%s")
Handler
intentional write failure
Retried.
Dial
Write("%s")
Handler
Write("%s")
Handler
`, tc.reqString, tc.reqString, tc.reqString)
if got != want {
t.Errorf("Log of events differs. Got:\n%s\nWant:\n%s", got, want)
}
})
}
}
// Issue 6981
func TestTransportClosesBodyOnError(t *testing.T) {
setParallel(t)
defer afterTest(t)
readBody := make(chan error, 1)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
_, err := io.ReadAll(r.Body)
readBody <- err
}))
defer ts.Close()
c := ts.Client()
fakeErr := errors.New("fake error")
didClose := make(chan bool, 1)
req, _ := NewRequest("POST", ts.URL, struct {
io.Reader
io.Closer
}{
io.MultiReader(io.LimitReader(neverEnding('x'), 1<<20), iotest.ErrReader(fakeErr)),
closerFunc(func() error {
select {
case didClose <- true:
default:
}
return nil
}),
})
res, err := c.Do(req)
if res != nil {
defer res.Body.Close()
}
if err == nil || !strings.Contains(err.Error(), fakeErr.Error()) {
t.Fatalf("Do error = %v; want something containing %q", err, fakeErr.Error())
}
select {
case err := <-readBody:
if err == nil {
t.Errorf("Unexpected success reading request body from handler; want 'unexpected EOF reading trailer'")
}
case <-time.After(5 * time.Second):
t.Error("timeout waiting for server handler to complete")
}
select {
case <-didClose:
default:
t.Errorf("didn't see Body.Close")
}
}
func TestTransportDialTLS(t *testing.T) {
setParallel(t)
defer afterTest(t)
var mu sync.Mutex // guards following
var gotReq, didDial bool
ts := httptest.NewTLSServer(HandlerFunc(func(w ResponseWriter, r *Request) {
mu.Lock()
gotReq = true
mu.Unlock()
}))
defer ts.Close()
c := ts.Client()
c.Transport.(*Transport).DialTLS = func(netw, addr string) (net.Conn, error) {
mu.Lock()
didDial = true
mu.Unlock()
c, err := tls.Dial(netw, addr, c.Transport.(*Transport).TLSClientConfig)
if err != nil {
return nil, err
}
return c, c.Handshake()
}
res, err := c.Get(ts.URL)
if err != nil {
t.Fatal(err)
}
res.Body.Close()
mu.Lock()
if !gotReq {
t.Error("didn't get request")
}
if !didDial {
t.Error("didn't use dial hook")
}
}
func TestTransportDialContext(t *testing.T) {
setParallel(t)
defer afterTest(t)
var mu sync.Mutex // guards following
var gotReq bool
var receivedContext context.Context
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
mu.Lock()
gotReq = true
mu.Unlock()
}))
defer ts.Close()
c := ts.Client()
c.Transport.(*Transport).DialContext = func(ctx context.Context, netw, addr string) (net.Conn, error) {
mu.Lock()
receivedContext = ctx
mu.Unlock()
return net.Dial(netw, addr)
}
req, err := NewRequest("GET", ts.URL, nil)
if err != nil {
t.Fatal(err)
}
ctx := context.WithValue(context.Background(), "some-key", "some-value")
res, err := c.Do(req.WithContext(ctx))
if err != nil {
t.Fatal(err)
}
res.Body.Close()
mu.Lock()
if !gotReq {
t.Error("didn't get request")
}
if receivedContext != ctx {
t.Error("didn't receive correct context")
}
}
func TestTransportDialTLSContext(t *testing.T) {
setParallel(t)
defer afterTest(t)
var mu sync.Mutex // guards following
var gotReq bool
var receivedContext context.Context
ts := httptest.NewTLSServer(HandlerFunc(func(w ResponseWriter, r *Request) {
mu.Lock()
gotReq = true
mu.Unlock()
}))
defer ts.Close()
c := ts.Client()
c.Transport.(*Transport).DialTLSContext = func(ctx context.Context, netw, addr string) (net.Conn, error) {
mu.Lock()
receivedContext = ctx
mu.Unlock()
c, err := tls.Dial(netw, addr, c.Transport.(*Transport).TLSClientConfig)
if err != nil {
return nil, err
}
return c, c.HandshakeContext(ctx)
}
req, err := NewRequest("GET", ts.URL, nil)
if err != nil {
t.Fatal(err)
}
ctx := context.WithValue(context.Background(), "some-key", "some-value")
res, err := c.Do(req.WithContext(ctx))
if err != nil {
t.Fatal(err)
}
res.Body.Close()
mu.Lock()
if !gotReq {
t.Error("didn't get request")
}
if receivedContext != ctx {
t.Error("didn't receive correct context")
}
}
// Test for issue 8755
// Ensure that if a proxy returns an error, it is exposed by RoundTrip
func TestRoundTripReturnsProxyError(t *testing.T) {
badProxy := func(*Request) (*url.URL, error) {
return nil, errors.New("errorMessage")
}
tr := &Transport{Proxy: badProxy}
req, _ := NewRequest("GET", "http://example.com", nil)
_, err := tr.RoundTrip(req)
if err == nil {
t.Error("Expected proxy error to be returned by RoundTrip")
}
}
// tests that putting an idle conn after a call to CloseIdleConns does return it
func TestTransportCloseIdleConnsThenReturn(t *testing.T) {
tr := &Transport{}
wantIdle := func(when string, n int) bool {
got := tr.IdleConnCountForTesting("http", "example.com") // key used by PutIdleTestConn
if got == n {
return true
}
t.Errorf("%s: idle conns = %d; want %d", when, got, n)
return false
}
wantIdle("start", 0)
if !tr.PutIdleTestConn("http", "example.com") {
t.Fatal("put failed")
}
if !tr.PutIdleTestConn("http", "example.com") {
t.Fatal("second put failed")
}
wantIdle("after put", 2)
tr.CloseIdleConnections()
if !tr.IsIdleForTesting() {
t.Error("should be idle after CloseIdleConnections")
}
wantIdle("after close idle", 0)
if tr.PutIdleTestConn("http", "example.com") {
t.Fatal("put didn't fail")
}
wantIdle("after second put", 0)
tr.QueueForIdleConnForTesting() // should toggle the transport out of idle mode
if tr.IsIdleForTesting() {
t.Error("shouldn't be idle after QueueForIdleConnForTesting")
}
if !tr.PutIdleTestConn("http", "example.com") {
t.Fatal("after re-activation")
}
wantIdle("after final put", 1)
}
// Test for issue 34282
// Ensure that getConn doesn't call the GotConn trace hook on a HTTP/2 idle conn
func TestTransportTraceGotConnH2IdleConns(t *testing.T) {
tr := &Transport{}
wantIdle := func(when string, n int) bool {
got := tr.IdleConnCountForTesting("https", "example.com:443") // key used by PutIdleTestConnH2
if got == n {
return true
}
t.Errorf("%s: idle conns = %d; want %d", when, got, n)
return false
}
wantIdle("start", 0)
alt := funcRoundTripper(func() {})
if !tr.PutIdleTestConnH2("https", "example.com:443", alt) {
t.Fatal("put failed")
}
wantIdle("after put", 1)
ctx := httptrace.WithClientTrace(context.Background(), &httptrace.ClientTrace{
GotConn: func(httptrace.GotConnInfo) {
// tr.getConn should leave it for the HTTP/2 alt to call GotConn.
t.Error("GotConn called")
},
})
req, _ := NewRequestWithContext(ctx, MethodGet, "https://example.com", nil)
_, err := tr.RoundTrip(req)
if err != errFakeRoundTrip {
t.Errorf("got error: %v; want %q", err, errFakeRoundTrip)
}
wantIdle("after round trip", 1)
}
func TestTransportRemovesH2ConnsAfterIdle(t *testing.T) {
if testing.Short() {
t.Skip("skipping in short mode")
}
trFunc := func(tr *Transport) {
tr.MaxConnsPerHost = 1
tr.MaxIdleConnsPerHost = 1
tr.IdleConnTimeout = 10 * time.Millisecond
}
cst := newClientServerTest(t, h2Mode, HandlerFunc(func(w ResponseWriter, r *Request) {}), trFunc)
defer cst.close()
if _, err := cst.c.Get(cst.ts.URL); err != nil {
t.Fatalf("got error: %s", err)
}
time.Sleep(100 * time.Millisecond)
got := make(chan error)
go func() {
if _, err := cst.c.Get(cst.ts.URL); err != nil {
got <- err
}
close(got)
}()
timeout := time.NewTimer(5 * time.Second)
defer timeout.Stop()
select {
case err := <-got:
if err != nil {
t.Fatalf("got error: %s", err)
}
case <-timeout.C:
t.Fatal("request never completed")
}
}
// This tests that a client requesting a content range won't also
// implicitly ask for gzip support. If they want that, they need to do it
// on their own.
// golang.org/issue/8923
func TestTransportRangeAndGzip(t *testing.T) {
defer afterTest(t)
reqc := make(chan *Request, 1)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
reqc <- r
}))
defer ts.Close()
c := ts.Client()
req, _ := NewRequest("GET", ts.URL, nil)
req.Header.Set("Range", "bytes=7-11")
res, err := c.Do(req)
if err != nil {
t.Fatal(err)
}
select {
case r := <-reqc:
if strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
t.Error("Transport advertised gzip support in the Accept header")
}
if r.Header.Get("Range") == "" {
t.Error("no Range in request")
}
case <-time.After(10 * time.Second):
t.Fatal("timeout")
}
res.Body.Close()
}
// Test for issue 10474
func TestTransportResponseCancelRace(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
// important that this response has a body.
var b [1024]byte
w.Write(b[:])
}))
defer ts.Close()
tr := ts.Client().Transport.(*Transport)
req, err := NewRequest("GET", ts.URL, nil)
if err != nil {
t.Fatal(err)
}
res, err := tr.RoundTrip(req)
if err != nil {
t.Fatal(err)
}
// If we do an early close, Transport just throws the connection away and
// doesn't reuse it. In order to trigger the bug, it has to reuse the connection
// so read the body
if _, err := io.Copy(io.Discard, res.Body); err != nil {
t.Fatal(err)
}
req2, err := NewRequest("GET", ts.URL, nil)
if err != nil {
t.Fatal(err)
}
tr.CancelRequest(req)
res, err = tr.RoundTrip(req2)
if err != nil {
t.Fatal(err)
}
res.Body.Close()
}
// Test for issue 19248: Content-Encoding's value is case insensitive.
func TestTransportContentEncodingCaseInsensitive(t *testing.T) {
setParallel(t)
defer afterTest(t)
for _, ce := range []string{"gzip", "GZIP"} {
ce := ce
t.Run(ce, func(t *testing.T) {
const encodedString = "Hello Gopher"
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Encoding", ce)
gz := gzip.NewWriter(w)
gz.Write([]byte(encodedString))
gz.Close()
}))
defer ts.Close()
res, err := ts.Client().Get(ts.URL)
if err != nil {
t.Fatal(err)
}
body, err := io.ReadAll(res.Body)
res.Body.Close()
if err != nil {
t.Fatal(err)
}
if string(body) != encodedString {
t.Fatalf("Expected body %q, got: %q\n", encodedString, string(body))
}
})
}
}
func TestTransportDialCancelRace(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {}))
defer ts.Close()
tr := ts.Client().Transport.(*Transport)
req, err := NewRequest("GET", ts.URL, nil)
if err != nil {
t.Fatal(err)
}
SetEnterRoundTripHook(func() {
tr.CancelRequest(req)
})
defer SetEnterRoundTripHook(nil)
res, err := tr.RoundTrip(req)
if err != ExportErrRequestCanceled {
t.Errorf("expected canceled request error; got %v", err)
if err == nil {
res.Body.Close()
}
}
}
// logWritesConn is a net.Conn that logs each Write call to writes
// and then proxies to w.
// It proxies Read calls to a reader it receives from rch.
type logWritesConn struct {
net.Conn // nil. crash on use.
w io.Writer
rch <-chan io.Reader
r io.Reader // nil until received by rch
mu sync.Mutex
writes []string
}
func (c *logWritesConn) Write(p []byte) (n int, err error) {
c.mu.Lock()
defer c.mu.Unlock()
c.writes = append(c.writes, string(p))
return c.w.Write(p)
}
func (c *logWritesConn) Read(p []byte) (n int, err error) {
if c.r == nil {
c.r = <-c.rch
}
return c.r.Read(p)
}
func (c *logWritesConn) Close() error { return nil }
// Issue 6574
func TestTransportFlushesBodyChunks(t *testing.T) {
defer afterTest(t)
resBody := make(chan io.Reader, 1)
connr, connw := io.Pipe() // connection pipe pair
lw := &logWritesConn{
rch: resBody,
w: connw,
}
tr := &Transport{
Dial: func(network, addr string) (net.Conn, error) {
return lw, nil
},
}
bodyr, bodyw := io.Pipe() // body pipe pair
go func() {
defer bodyw.Close()
for i := 0; i < 3; i++ {
fmt.Fprintf(bodyw, "num%d\n", i)
}
}()
resc := make(chan *Response)
go func() {
req, _ := NewRequest("POST", "http://localhost:8080", bodyr)
req.Header.Set("User-Agent", "x") // known value for test
res, err := tr.RoundTrip(req)
if err != nil {
t.Errorf("RoundTrip: %v", err)
close(resc)
return
}
resc <- res
}()
// Fully consume the request before checking the Write log vs. want.
req, err := ReadRequest(bufio.NewReader(connr))
if err != nil {
t.Fatal(err)
}
io.Copy(io.Discard, req.Body)
// Unblock the transport's roundTrip goroutine.
resBody <- strings.NewReader("HTTP/1.1 204 No Content\r\nConnection: close\r\n\r\n")
res, ok := <-resc
if !ok {
return
}
defer res.Body.Close()
want := []string{
"POST / HTTP/1.1\r\nHost: localhost:8080\r\nUser-Agent: x\r\nTransfer-Encoding: chunked\r\nAccept-Encoding: gzip\r\n\r\n",
"5\r\nnum0\n\r\n",
"5\r\nnum1\n\r\n",
"5\r\nnum2\n\r\n",
"0\r\n\r\n",
}
if !reflect.DeepEqual(lw.writes, want) {
t.Errorf("Writes differed.\n Got: %q\nWant: %q\n", lw.writes, want)
}
}
// Issue 22088: flush Transport request headers if we're not sure the body won't block on read.
func TestTransportFlushesRequestHeader(t *testing.T) {
defer afterTest(t)
gotReq := make(chan struct{})
cst := newClientServerTest(t, h1Mode, HandlerFunc(func(w ResponseWriter, r *Request) {
close(gotReq)
}))
defer cst.close()
pr, pw := io.Pipe()
req, err := NewRequest("POST", cst.ts.URL, pr)
if err != nil {
t.Fatal(err)
}
gotRes := make(chan struct{})
go func() {
defer close(gotRes)
res, err := cst.tr.RoundTrip(req)
if err != nil {
t.Error(err)
return
}
res.Body.Close()
}()
select {
case <-gotReq:
pw.Close()
case <-time.After(5 * time.Second):
t.Fatal("timeout waiting for handler to get request")
}
<-gotRes
}
// Issue 11745.
func TestTransportPrefersResponseOverWriteError(t *testing.T) {
if testing.Short() {
t.Skip("skipping in short mode")
}
defer afterTest(t)
const contentLengthLimit = 1024 * 1024 // 1MB
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
if r.ContentLength >= contentLengthLimit {
w.WriteHeader(StatusBadRequest)
r.Body.Close()
return
}
w.WriteHeader(StatusOK)
}))
defer ts.Close()
c := ts.Client()
fail := 0
count := 100
bigBody := strings.Repeat("a", contentLengthLimit*2)
for i := 0; i < count; i++ {
req, err := NewRequest("PUT", ts.URL, strings.NewReader(bigBody))
if err != nil {
t.Fatal(err)
}
resp, err := c.Do(req)
if err != nil {
fail++
t.Logf("%d = %#v", i, err)
if ue, ok := err.(*url.Error); ok {
t.Logf("urlErr = %#v", ue.Err)
if ne, ok := ue.Err.(*net.OpError); ok {
t.Logf("netOpError = %#v", ne.Err)
}
}
} else {
resp.Body.Close()
if resp.StatusCode != 400 {
t.Errorf("Expected status code 400, got %v", resp.Status)
}
}
}
if fail > 0 {
t.Errorf("Failed %v out of %v\n", fail, count)
}
}
func TestTransportAutomaticHTTP2(t *testing.T) {
testTransportAutoHTTP(t, &Transport{}, true)
}
func TestTransportAutomaticHTTP2_DialerAndTLSConfigSupportsHTTP2AndTLSConfig(t *testing.T) {
testTransportAutoHTTP(t, &Transport{
ForceAttemptHTTP2: true,
TLSClientConfig: new(tls.Config),
}, true)
}
// golang.org/issue/14391: also check DefaultTransport
func TestTransportAutomaticHTTP2_DefaultTransport(t *testing.T) {
testTransportAutoHTTP(t, DefaultTransport.(*Transport), true)
}
func TestTransportAutomaticHTTP2_TLSNextProto(t *testing.T) {
testTransportAutoHTTP(t, &Transport{
TLSNextProto: make(map[string]func(string, *tls.Conn) RoundTripper),
}, false)
}
func TestTransportAutomaticHTTP2_TLSConfig(t *testing.T) {
testTransportAutoHTTP(t, &Transport{
TLSClientConfig: new(tls.Config),
}, false)
}
func TestTransportAutomaticHTTP2_ExpectContinueTimeout(t *testing.T) {
testTransportAutoHTTP(t, &Transport{
ExpectContinueTimeout: 1 * time.Second,
}, true)
}
func TestTransportAutomaticHTTP2_Dial(t *testing.T) {
var d net.Dialer
testTransportAutoHTTP(t, &Transport{
Dial: d.Dial,
}, false)
}
func TestTransportAutomaticHTTP2_DialContext(t *testing.T) {
var d net.Dialer
testTransportAutoHTTP(t, &Transport{
DialContext: d.DialContext,
}, false)
}
func TestTransportAutomaticHTTP2_DialTLS(t *testing.T) {
testTransportAutoHTTP(t, &Transport{
DialTLS: func(network, addr string) (net.Conn, error) {
panic("unused")
},
}, false)
}
func testTransportAutoHTTP(t *testing.T, tr *Transport, wantH2 bool) {
CondSkipHTTP2(t)
_, err := tr.RoundTrip(new(Request))
if err == nil {
t.Error("expected error from RoundTrip")
}
if reg := tr.TLSNextProto["h2"] != nil; reg != wantH2 {
t.Errorf("HTTP/2 registered = %v; want %v", reg, wantH2)
}
}
// Issue 13633: there was a race where we returned bodyless responses
// to callers before recycling the persistent connection, which meant
// a client doing two subsequent requests could end up on different
// connections. It's somewhat harmless but enough tests assume it's
// not true in order to test other things that it's worth fixing.
// Plus it's nice to be consistent and not have timing-dependent
// behavior.
func TestTransportReuseConnEmptyResponseBody(t *testing.T) {
defer afterTest(t)
cst := newClientServerTest(t, h1Mode, HandlerFunc(func(w ResponseWriter, r *Request) {
w.Header().Set("X-Addr", r.RemoteAddr)
// Empty response body.
}))
defer cst.close()
n := 100
if testing.Short() {
n = 10
}
var firstAddr string
for i := 0; i < n; i++ {
res, err := cst.c.Get(cst.ts.URL)
if err != nil {
log.Fatal(err)
}
addr := res.Header.Get("X-Addr")
if i == 0 {
firstAddr = addr
} else if addr != firstAddr {
t.Fatalf("On request %d, addr %q != original addr %q", i+1, addr, firstAddr)
}
res.Body.Close()
}
}
// Issue 13839
func TestNoCrashReturningTransportAltConn(t *testing.T) {
cert, err := tls.X509KeyPair(testcert.LocalhostCert, testcert.LocalhostKey)
if err != nil {
t.Fatal(err)
}
ln := newLocalListener(t)
defer ln.Close()
var wg sync.WaitGroup
SetPendingDialHooks(func() { wg.Add(1) }, wg.Done)
defer SetPendingDialHooks(nil, nil)
testDone := make(chan struct{})
defer close(testDone)
go func() {
tln := tls.NewListener(ln, &tls.Config{
NextProtos: []string{"foo"},
Certificates: []tls.Certificate{cert},
})
sc, err := tln.Accept()
if err != nil {
t.Error(err)
return
}
if err := sc.(*tls.Conn).Handshake(); err != nil {
t.Error(err)
return
}
<-testDone
sc.Close()
}()
addr := ln.Addr().String()
req, _ := NewRequest("GET", "https://fake.tld/", nil)
cancel := make(chan struct{})
req.Cancel = cancel
doReturned := make(chan bool, 1)
madeRoundTripper := make(chan bool, 1)
tr := &Transport{
DisableKeepAlives: true,
TLSNextProto: map[string]func(string, *tls.Conn) RoundTripper{
"foo": func(authority string, c *tls.Conn) RoundTripper {
madeRoundTripper <- true
return funcRoundTripper(func() {
t.Error("foo RoundTripper should not be called")
})
},
},
Dial: func(_, _ string) (net.Conn, error) {
panic("shouldn't be called")
},
DialTLS: func(_, _ string) (net.Conn, error) {
tc, err := tls.Dial("tcp", addr, &tls.Config{
InsecureSkipVerify: true,
NextProtos: []string{"foo"},
})
if err != nil {
return nil, err
}
if err := tc.Handshake(); err != nil {
return nil, err
}
close(cancel)
<-doReturned
return tc, nil
},
}
c := &Client{Transport: tr}
_, err = c.Do(req)
if ue, ok := err.(*url.Error); !ok || ue.Err != ExportErrRequestCanceledConn {
t.Fatalf("Do error = %v; want url.Error with errRequestCanceledConn", err)
}
doReturned <- true
<-madeRoundTripper
wg.Wait()
}
func TestTransportReuseConnection_Gzip_Chunked(t *testing.T) {
testTransportReuseConnection_Gzip(t, true)
}
func TestTransportReuseConnection_Gzip_ContentLength(t *testing.T) {
testTransportReuseConnection_Gzip(t, false)
}
// Make sure we re-use underlying TCP connection for gzipped responses too.
func testTransportReuseConnection_Gzip(t *testing.T, chunked bool) {
setParallel(t)
defer afterTest(t)
addr := make(chan string, 2)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
addr <- r.RemoteAddr
w.Header().Set("Content-Encoding", "gzip")
if chunked {
w.(Flusher).Flush()
}
w.Write(rgz) // arbitrary gzip response
}))
defer ts.Close()
c := ts.Client()
for i := 0; i < 2; i++ {
res, err := c.Get(ts.URL)
if err != nil {
t.Fatal(err)
}
buf := make([]byte, len(rgz))
if n, err := io.ReadFull(res.Body, buf); err != nil {
t.Errorf("%d. ReadFull = %v, %v", i, n, err)
}
// Note: no res.Body.Close call. It should work without it,
// since the flate.Reader's internal buffering will hit EOF
// and that should be sufficient.
}
a1, a2 := <-addr, <-addr
if a1 != a2 {
t.Fatalf("didn't reuse connection")
}
}
func TestTransportResponseHeaderLength(t *testing.T) {
setParallel(t)
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
if r.URL.Path == "/long" {
w.Header().Set("Long", strings.Repeat("a", 1<<20))
}
}))
defer ts.Close()
c := ts.Client()
c.Transport.(*Transport).MaxResponseHeaderBytes = 512 << 10
if res, err := c.Get(ts.URL); err != nil {
t.Fatal(err)
} else {
res.Body.Close()
}
res, err := c.Get(ts.URL + "/long")
if err == nil {
defer res.Body.Close()
var n int64
for k, vv := range res.Header {
for _, v := range vv {
n += int64(len(k)) + int64(len(v))
}
}
t.Fatalf("Unexpected success. Got %v and %d bytes of response headers", res.Status, n)
}
if want := "server response headers exceeded 524288 bytes"; !strings.Contains(err.Error(), want) {
t.Errorf("got error: %v; want %q", err, want)
}
}
func TestTransportEventTrace(t *testing.T) { testTransportEventTrace(t, h1Mode, false) }
func TestTransportEventTrace_h2(t *testing.T) { testTransportEventTrace(t, h2Mode, false) }
// test a non-nil httptrace.ClientTrace but with all hooks set to zero.
func TestTransportEventTrace_NoHooks(t *testing.T) { testTransportEventTrace(t, h1Mode, true) }
func TestTransportEventTrace_NoHooks_h2(t *testing.T) { testTransportEventTrace(t, h2Mode, true) }
func testTransportEventTrace(t *testing.T, h2 bool, noHooks bool) {
defer afterTest(t)
const resBody = "some body"
gotWroteReqEvent := make(chan struct{}, 500)
cst := newClientServerTest(t, h2, HandlerFunc(func(w ResponseWriter, r *Request) {
if r.Method == "GET" {
// Do nothing for the second request.
return
}
if _, err := io.ReadAll(r.Body); err != nil {
t.Error(err)
}
if !noHooks {
select {
case <-gotWroteReqEvent:
case <-time.After(5 * time.Second):
t.Error("timeout waiting for WroteRequest event")
}
}
io.WriteString(w, resBody)
}))
defer cst.close()
cst.tr.ExpectContinueTimeout = 1 * time.Second
var mu sync.Mutex // guards buf
var buf bytes.Buffer
logf := func(format string, args ...any) {
mu.Lock()
defer mu.Unlock()
fmt.Fprintf(&buf, format, args...)
buf.WriteByte('\n')
}
addrStr := cst.ts.Listener.Addr().String()
ip, port, err := net.SplitHostPort(addrStr)
if err != nil {
t.Fatal(err)
}
// Install a fake DNS server.
ctx := context.WithValue(context.Background(), nettrace.LookupIPAltResolverKey{}, func(ctx context.Context, network, host string) ([]net.IPAddr, error) {
if host != "dns-is-faked.golang" {
t.Errorf("unexpected DNS host lookup for %q/%q", network, host)
return nil, nil
}
return []net.IPAddr{{IP: net.ParseIP(ip)}}, nil
})
body := "some body"
req, _ := NewRequest("POST", cst.scheme()+"://dns-is-faked.golang:"+port, strings.NewReader(body))
req.Header["X-Foo-Multiple-Vals"] = []string{"bar", "baz"}
trace := &httptrace.ClientTrace{
GetConn: func(hostPort string) { logf("Getting conn for %v ...", hostPort) },
GotConn: func(ci httptrace.GotConnInfo) { logf("got conn: %+v", ci) },
GotFirstResponseByte: func() { logf("first response byte") },
PutIdleConn: func(err error) { logf("PutIdleConn = %v", err) },
DNSStart: func(e httptrace.DNSStartInfo) { logf("DNS start: %+v", e) },
DNSDone: func(e httptrace.DNSDoneInfo) { logf("DNS done: %+v", e) },
ConnectStart: func(network, addr string) { logf("ConnectStart: Connecting to %s %s ...", network, addr) },
ConnectDone: func(network, addr string, err error) {
if err != nil {
t.Errorf("ConnectDone: %v", err)
}
logf("ConnectDone: connected to %s %s = %v", network, addr, err)
},
WroteHeaderField: func(key string, value []string) {
logf("WroteHeaderField: %s: %v", key, value)
},
WroteHeaders: func() {
logf("WroteHeaders")
},
Wait100Continue: func() { logf("Wait100Continue") },
Got100Continue: func() { logf("Got100Continue") },
WroteRequest: func(e httptrace.WroteRequestInfo) {
logf("WroteRequest: %+v", e)
gotWroteReqEvent <- struct{}{}
},
}
if h2 {
trace.TLSHandshakeStart = func() { logf("tls handshake start") }
trace.TLSHandshakeDone = func(s tls.ConnectionState, err error) {
logf("tls handshake done. ConnectionState = %v \n err = %v", s, err)
}
}
if noHooks {
// zero out all func pointers, trying to get some path to crash
*trace = httptrace.ClientTrace{}
}
req = req.WithContext(httptrace.WithClientTrace(ctx, trace))
req.Header.Set("Expect", "100-continue")
res, err := cst.c.Do(req)
if err != nil {
t.Fatal(err)
}
logf("got roundtrip.response")
slurp, err := io.ReadAll(res.Body)
if err != nil {
t.Fatal(err)
}
logf("consumed body")
if string(slurp) != resBody || res.StatusCode != 200 {
t.Fatalf("Got %q, %v; want %q, 200 OK", slurp, res.Status, resBody)
}
res.Body.Close()
if noHooks {
// Done at this point. Just testing a full HTTP
// requests can happen with a trace pointing to a zero
// ClientTrace, full of nil func pointers.
return
}
mu.Lock()
got := buf.String()
mu.Unlock()
wantOnce := func(sub string) {
if strings.Count(got, sub) != 1 {
t.Errorf("expected substring %q exactly once in output.", sub)
}
}
wantOnceOrMore := func(sub string) {
if strings.Count(got, sub) == 0 {
t.Errorf("expected substring %q at least once in output.", sub)
}
}
wantOnce("Getting conn for dns-is-faked.golang:" + port)
wantOnce("DNS start: {Host:dns-is-faked.golang}")
wantOnce("DNS done: {Addrs:[{IP:" + ip + " Zone:}] Err:<nil> Coalesced:false}")
wantOnce("got conn: {")
wantOnceOrMore("Connecting to tcp " + addrStr)
wantOnceOrMore("connected to tcp " + addrStr + " = <nil>")
wantOnce("Reused:false WasIdle:false IdleTime:0s")
wantOnce("first response byte")
if h2 {
wantOnce("tls handshake start")
wantOnce("tls handshake done")
} else {
wantOnce("PutIdleConn = <nil>")
wantOnce("WroteHeaderField: User-Agent: [Go-http-client/1.1]")
// TODO(meirf): issue 19761. Make these agnostic to h1/h2. (These are not h1 specific, but the
// WroteHeaderField hook is not yet implemented in h2.)
wantOnce(fmt.Sprintf("WroteHeaderField: Host: [dns-is-faked.golang:%s]", port))
wantOnce(fmt.Sprintf("WroteHeaderField: Content-Length: [%d]", len(body)))
wantOnce("WroteHeaderField: X-Foo-Multiple-Vals: [bar baz]")
wantOnce("WroteHeaderField: Accept-Encoding: [gzip]")
}
wantOnce("WroteHeaders")
wantOnce("Wait100Continue")
wantOnce("Got100Continue")
wantOnce("WroteRequest: {Err:<nil>}")
if strings.Contains(got, " to udp ") {
t.Errorf("should not see UDP (DNS) connections")
}
if t.Failed() {
t.Errorf("Output:\n%s", got)
}
// And do a second request:
req, _ = NewRequest("GET", cst.scheme()+"://dns-is-faked.golang:"+port, nil)
req = req.WithContext(httptrace.WithClientTrace(ctx, trace))
res, err = cst.c.Do(req)
if err != nil {
t.Fatal(err)
}
if res.StatusCode != 200 {
t.Fatal(res.Status)
}
res.Body.Close()
mu.Lock()
got = buf.String()
mu.Unlock()
sub := "Getting conn for dns-is-faked.golang:"
if gotn, want := strings.Count(got, sub), 2; gotn != want {
t.Errorf("substring %q appeared %d times; want %d. Log:\n%s", sub, gotn, want, got)
}
}
func TestTransportEventTraceTLSVerify(t *testing.T) {
var mu sync.Mutex
var buf bytes.Buffer
logf := func(format string, args ...any) {
mu.Lock()
defer mu.Unlock()
fmt.Fprintf(&buf, format, args...)
buf.WriteByte('\n')
}
ts := httptest.NewTLSServer(HandlerFunc(func(w ResponseWriter, r *Request) {
t.Error("Unexpected request")
}))
defer ts.Close()
ts.Config.ErrorLog = log.New(funcWriter(func(p []byte) (int, error) {
logf("%s", p)
return len(p), nil
}), "", 0)
certpool := x509.NewCertPool()
certpool.AddCert(ts.Certificate())
c := &Client{Transport: &Transport{
TLSClientConfig: &tls.Config{
ServerName: "dns-is-faked.golang",
RootCAs: certpool,
},
}}
trace := &httptrace.ClientTrace{
TLSHandshakeStart: func() { logf("TLSHandshakeStart") },
TLSHandshakeDone: func(s tls.ConnectionState, err error) {
logf("TLSHandshakeDone: ConnectionState = %v \n err = %v", s, err)
},
}
req, _ := NewRequest("GET", ts.URL, nil)
req = req.WithContext(httptrace.WithClientTrace(context.Background(), trace))
_, err := c.Do(req)
if err == nil {
t.Error("Expected request to fail TLS verification")
}
mu.Lock()
got := buf.String()
mu.Unlock()
wantOnce := func(sub string) {
if strings.Count(got, sub) != 1 {
t.Errorf("expected substring %q exactly once in output.", sub)
}
}
wantOnce("TLSHandshakeStart")
wantOnce("TLSHandshakeDone")
wantOnce("err = x509: certificate is valid for example.com")
if t.Failed() {
t.Errorf("Output:\n%s", got)
}
}
var (
isDNSHijackedOnce sync.Once
isDNSHijacked bool
)
func skipIfDNSHijacked(t *testing.T) {
// Skip this test if the user is using a shady/ISP
// DNS server hijacking queries.
// See issues 16732, 16716.
isDNSHijackedOnce.Do(func() {
addrs, _ := net.LookupHost("dns-should-not-resolve.golang")
isDNSHijacked = len(addrs) != 0
})
if isDNSHijacked {
t.Skip("skipping; test requires non-hijacking DNS server")
}
}
func TestTransportEventTraceRealDNS(t *testing.T) {
skipIfDNSHijacked(t)
defer afterTest(t)
tr := &Transport{}
defer tr.CloseIdleConnections()
c := &Client{Transport: tr}
var mu sync.Mutex // guards buf
var buf bytes.Buffer
logf := func(format string, args ...any) {
mu.Lock()
defer mu.Unlock()
fmt.Fprintf(&buf, format, args...)
buf.WriteByte('\n')
}
req, _ := NewRequest("GET", "http://dns-should-not-resolve.golang:80", nil)
trace := &httptrace.ClientTrace{
DNSStart: func(e httptrace.DNSStartInfo) { logf("DNSStart: %+v", e) },
DNSDone: func(e httptrace.DNSDoneInfo) { logf("DNSDone: %+v", e) },
ConnectStart: func(network, addr string) { logf("ConnectStart: %s %s", network, addr) },
ConnectDone: func(network, addr string, err error) { logf("ConnectDone: %s %s %v", network, addr, err) },
}
req = req.WithContext(httptrace.WithClientTrace(context.Background(), trace))
resp, err := c.Do(req)
if err == nil {
resp.Body.Close()
t.Fatal("expected error during DNS lookup")
}
mu.Lock()
got := buf.String()
mu.Unlock()
wantSub := func(sub string) {
if !strings.Contains(got, sub) {
t.Errorf("expected substring %q in output.", sub)
}
}
wantSub("DNSStart: {Host:dns-should-not-resolve.golang}")
wantSub("DNSDone: {Addrs:[] Err:")
if strings.Contains(got, "ConnectStart") || strings.Contains(got, "ConnectDone") {
t.Errorf("should not see Connect events")
}
if t.Failed() {
t.Errorf("Output:\n%s", got)
}
}
// Issue 14353: port can only contain digits.
func TestTransportRejectsAlphaPort(t *testing.T) {
res, err := Get("http://dummy.tld:123foo/bar")
if err == nil {
res.Body.Close()
t.Fatal("unexpected success")
}
ue, ok := err.(*url.Error)
if !ok {
t.Fatalf("got %#v; want *url.Error", err)
}
got := ue.Err.Error()
want := `invalid port ":123foo" after host`
if got != want {
t.Errorf("got error %q; want %q", got, want)
}
}
// Test the httptrace.TLSHandshake{Start,Done} hooks with a https http1
// connections. The http2 test is done in TestTransportEventTrace_h2
func TestTLSHandshakeTrace(t *testing.T) {
defer afterTest(t)
ts := httptest.NewTLSServer(HandlerFunc(func(w ResponseWriter, r *Request) {}))
defer ts.Close()
var mu sync.Mutex
var start, done bool
trace := &httptrace.ClientTrace{
TLSHandshakeStart: func() {
mu.Lock()
defer mu.Unlock()
start = true
},
TLSHandshakeDone: func(s tls.ConnectionState, err error) {
mu.Lock()
defer mu.Unlock()
done = true
if err != nil {
t.Fatal("Expected error to be nil but was:", err)
}
},
}
c := ts.Client()
req, err := NewRequest("GET", ts.URL, nil)
if err != nil {
t.Fatal("Unable to construct test request:", err)
}
req = req.WithContext(httptrace.WithClientTrace(req.Context(), trace))
r, err := c.Do(req)
if err != nil {
t.Fatal("Unexpected error making request:", err)
}
r.Body.Close()
mu.Lock()
defer mu.Unlock()
if !start {
t.Fatal("Expected TLSHandshakeStart to be called, but wasn't")
}
if !done {
t.Fatal("Expected TLSHandshakeDone to be called, but wasnt't")
}
}
func TestTransportMaxIdleConns(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
// No body for convenience.
}))
defer ts.Close()
c := ts.Client()
tr := c.Transport.(*Transport)
tr.MaxIdleConns = 4
ip, port, err := net.SplitHostPort(ts.Listener.Addr().String())
if err != nil {
t.Fatal(err)
}
ctx := context.WithValue(context.Background(), nettrace.LookupIPAltResolverKey{}, func(ctx context.Context, _, host string) ([]net.IPAddr, error) {
return []net.IPAddr{{IP: net.ParseIP(ip)}}, nil
})
hitHost := func(n int) {
req, _ := NewRequest("GET", fmt.Sprintf("http://host-%d.dns-is-faked.golang:"+port, n), nil)
req = req.WithContext(ctx)
res, err := c.Do(req)
if err != nil {
t.Fatal(err)
}
res.Body.Close()
}
for i := 0; i < 4; i++ {
hitHost(i)
}
want := []string{
"|http|host-0.dns-is-faked.golang:" + port,
"|http|host-1.dns-is-faked.golang:" + port,
"|http|host-2.dns-is-faked.golang:" + port,
"|http|host-3.dns-is-faked.golang:" + port,
}
if got := tr.IdleConnKeysForTesting(); !reflect.DeepEqual(got, want) {
t.Fatalf("idle conn keys mismatch.\n got: %q\nwant: %q\n", got, want)
}
// Now hitting the 5th host should kick out the first host:
hitHost(4)
want = []string{
"|http|host-1.dns-is-faked.golang:" + port,
"|http|host-2.dns-is-faked.golang:" + port,
"|http|host-3.dns-is-faked.golang:" + port,
"|http|host-4.dns-is-faked.golang:" + port,
}
if got := tr.IdleConnKeysForTesting(); !reflect.DeepEqual(got, want) {
t.Fatalf("idle conn keys mismatch after 5th host.\n got: %q\nwant: %q\n", got, want)
}
}
func TestTransportIdleConnTimeout_h1(t *testing.T) { testTransportIdleConnTimeout(t, h1Mode) }
func TestTransportIdleConnTimeout_h2(t *testing.T) { testTransportIdleConnTimeout(t, h2Mode) }
func testTransportIdleConnTimeout(t *testing.T, h2 bool) {
if testing.Short() {
t.Skip("skipping in short mode")
}
defer afterTest(t)
const timeout = 1 * time.Second
cst := newClientServerTest(t, h2, HandlerFunc(func(w ResponseWriter, r *Request) {
// No body for convenience.
}))
defer cst.close()
tr := cst.tr
tr.IdleConnTimeout = timeout
defer tr.CloseIdleConnections()
c := &Client{Transport: tr}
idleConns := func() []string {
if h2 {
return tr.IdleConnStrsForTesting_h2()
} else {
return tr.IdleConnStrsForTesting()
}
}
var conn string
doReq := func(n int) {
req, _ := NewRequest("GET", cst.ts.URL, nil)
req = req.WithContext(httptrace.WithClientTrace(context.Background(), &httptrace.ClientTrace{
PutIdleConn: func(err error) {
if err != nil {
t.Errorf("failed to keep idle conn: %v", err)
}
},
}))
res, err := c.Do(req)
if err != nil {
t.Fatal(err)
}
res.Body.Close()
conns := idleConns()
if len(conns) != 1 {
t.Fatalf("req %v: unexpected number of idle conns: %q", n, conns)
}
if conn == "" {
conn = conns[0]
}
if conn != conns[0] {
t.Fatalf("req %v: cached connection changed; expected the same one throughout the test", n)
}
}
for i := 0; i < 3; i++ {
doReq(i)
time.Sleep(timeout / 2)
}
time.Sleep(timeout * 3 / 2)
if got := idleConns(); len(got) != 0 {
t.Errorf("idle conns = %q; want none", got)
}
}
// Issue 16208: Go 1.7 crashed after Transport.IdleConnTimeout if an
// HTTP/2 connection was established but its caller no longer
// wanted it. (Assuming the connection cache was enabled, which it is
// by default)
//
// This test reproduced the crash by setting the IdleConnTimeout low
// (to make the test reasonable) and then making a request which is
// canceled by the DialTLS hook, which then also waits to return the
// real connection until after the RoundTrip saw the error. Then we
// know the successful tls.Dial from DialTLS will need to go into the
// idle pool. Then we give it a of time to explode.
func TestIdleConnH2Crash(t *testing.T) {
setParallel(t)
cst := newClientServerTest(t, h2Mode, HandlerFunc(func(w ResponseWriter, r *Request) {
// nothing
}))
defer cst.close()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
sawDoErr := make(chan bool, 1)
testDone := make(chan struct{})
defer close(testDone)
cst.tr.IdleConnTimeout = 5 * time.Millisecond
cst.tr.DialTLS = func(network, addr string) (net.Conn, error) {
c, err := tls.Dial(network, addr, &tls.Config{
InsecureSkipVerify: true,
NextProtos: []string{"h2"},
})
if err != nil {
t.Error(err)
return nil, err
}
if cs := c.ConnectionState(); cs.NegotiatedProtocol != "h2" {
t.Errorf("protocol = %q; want %q", cs.NegotiatedProtocol, "h2")
c.Close()
return nil, errors.New("bogus")
}
cancel()
failTimer := time.NewTimer(5 * time.Second)
defer failTimer.Stop()
select {
case <-sawDoErr:
case <-testDone:
case <-failTimer.C:
t.Error("timeout in DialTLS, waiting too long for cst.c.Do to fail")
}
return c, nil
}
req, _ := NewRequest("GET", cst.ts.URL, nil)
req = req.WithContext(ctx)
res, err := cst.c.Do(req)
if err == nil {
res.Body.Close()
t.Fatal("unexpected success")
}
sawDoErr <- true
// Wait for the explosion.
time.Sleep(cst.tr.IdleConnTimeout * 10)
}
type funcConn struct {
net.Conn
read func([]byte) (int, error)
write func([]byte) (int, error)
}
func (c funcConn) Read(p []byte) (int, error) { return c.read(p) }
func (c funcConn) Write(p []byte) (int, error) { return c.write(p) }
func (c funcConn) Close() error { return nil }
// Issue 16465: Transport.RoundTrip should return the raw net.Conn.Read error from Peek
// back to the caller.
func TestTransportReturnsPeekError(t *testing.T) {
errValue := errors.New("specific error value")
wrote := make(chan struct{})
var wroteOnce sync.Once
tr := &Transport{
Dial: func(network, addr string) (net.Conn, error) {
c := funcConn{
read: func([]byte) (int, error) {
<-wrote
return 0, errValue
},
write: func(p []byte) (int, error) {
wroteOnce.Do(func() { close(wrote) })
return len(p), nil
},
}
return c, nil
},
}
_, err := tr.RoundTrip(httptest.NewRequest("GET", "http://fake.tld/", nil))
if err != errValue {
t.Errorf("error = %#v; want %v", err, errValue)
}
}
// Issue 13835: international domain names should work
func TestTransportIDNA_h1(t *testing.T) { testTransportIDNA(t, h1Mode) }
func TestTransportIDNA_h2(t *testing.T) { testTransportIDNA(t, h2Mode) }
func testTransportIDNA(t *testing.T, h2 bool) {
defer afterTest(t)
const uniDomain = "гофер.го"
const punyDomain = "xn--c1ae0ajs.xn--c1aw"
var port string
cst := newClientServerTest(t, h2, HandlerFunc(func(w ResponseWriter, r *Request) {
want := punyDomain + ":" + port
if r.Host != want {
t.Errorf("Host header = %q; want %q", r.Host, want)
}
if h2 {
if r.TLS == nil {
t.Errorf("r.TLS == nil")
} else if r.TLS.ServerName != punyDomain {
t.Errorf("TLS.ServerName = %q; want %q", r.TLS.ServerName, punyDomain)
}
}
w.Header().Set("Hit-Handler", "1")
}))
defer cst.close()
ip, port, err := net.SplitHostPort(cst.ts.Listener.Addr().String())
if err != nil {
t.Fatal(err)
}
// Install a fake DNS server.
ctx := context.WithValue(context.Background(), nettrace.LookupIPAltResolverKey{}, func(ctx context.Context, network, host string) ([]net.IPAddr, error) {
if host != punyDomain {
t.Errorf("got DNS host lookup for %q/%q; want %q", network, host, punyDomain)
return nil, nil
}
return []net.IPAddr{{IP: net.ParseIP(ip)}}, nil
})
req, _ := NewRequest("GET", cst.scheme()+"://"+uniDomain+":"+port, nil)
trace := &httptrace.ClientTrace{
GetConn: func(hostPort string) {
want := net.JoinHostPort(punyDomain, port)
if hostPort != want {
t.Errorf("getting conn for %q; want %q", hostPort, want)
}
},
DNSStart: func(e httptrace.DNSStartInfo) {
if e.Host != punyDomain {
t.Errorf("DNSStart Host = %q; want %q", e.Host, punyDomain)
}
},
}
req = req.WithContext(httptrace.WithClientTrace(ctx, trace))
res, err := cst.tr.RoundTrip(req)
if err != nil {
t.Fatal(err)
}
defer res.Body.Close()
if res.Header.Get("Hit-Handler") != "1" {
out, err := httputil.DumpResponse(res, true)
if err != nil {
t.Fatal(err)
}
t.Errorf("Response body wasn't from Handler. Got:\n%s\n", out)
}
}
// Issue 13290: send User-Agent in proxy CONNECT
func TestTransportProxyConnectHeader(t *testing.T) {
defer afterTest(t)
reqc := make(chan *Request, 1)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
if r.Method != "CONNECT" {
t.Errorf("method = %q; want CONNECT", r.Method)
}
reqc <- r
c, _, err := w.(Hijacker).Hijack()
if err != nil {
t.Errorf("Hijack: %v", err)
return
}
c.Close()
}))
defer ts.Close()
c := ts.Client()
c.Transport.(*Transport).Proxy = func(r *Request) (*url.URL, error) {
return url.Parse(ts.URL)
}
c.Transport.(*Transport).ProxyConnectHeader = Header{
"User-Agent": {"foo"},
"Other": {"bar"},
}
res, err := c.Get("https://dummy.tld/") // https to force a CONNECT
if err == nil {
res.Body.Close()
t.Errorf("unexpected success")
}
select {
case <-time.After(3 * time.Second):
t.Fatal("timeout")
case r := <-reqc:
if got, want := r.Header.Get("User-Agent"), "foo"; got != want {
t.Errorf("CONNECT request User-Agent = %q; want %q", got, want)
}
if got, want := r.Header.Get("Other"), "bar"; got != want {
t.Errorf("CONNECT request Other = %q; want %q", got, want)
}
}
}
func TestTransportProxyGetConnectHeader(t *testing.T) {
defer afterTest(t)
reqc := make(chan *Request, 1)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
if r.Method != "CONNECT" {
t.Errorf("method = %q; want CONNECT", r.Method)
}
reqc <- r
c, _, err := w.(Hijacker).Hijack()
if err != nil {
t.Errorf("Hijack: %v", err)
return
}
c.Close()
}))
defer ts.Close()
c := ts.Client()
c.Transport.(*Transport).Proxy = func(r *Request) (*url.URL, error) {
return url.Parse(ts.URL)
}
// These should be ignored:
c.Transport.(*Transport).ProxyConnectHeader = Header{
"User-Agent": {"foo"},
"Other": {"bar"},
}
c.Transport.(*Transport).GetProxyConnectHeader = func(ctx context.Context, proxyURL *url.URL, target string) (Header, error) {
return Header{
"User-Agent": {"foo2"},
"Other": {"bar2"},
}, nil
}
res, err := c.Get("https://dummy.tld/") // https to force a CONNECT
if err == nil {
res.Body.Close()
t.Errorf("unexpected success")
}
select {
case <-time.After(3 * time.Second):
t.Fatal("timeout")
case r := <-reqc:
if got, want := r.Header.Get("User-Agent"), "foo2"; got != want {
t.Errorf("CONNECT request User-Agent = %q; want %q", got, want)
}
if got, want := r.Header.Get("Other"), "bar2"; got != want {
t.Errorf("CONNECT request Other = %q; want %q", got, want)
}
}
}
var errFakeRoundTrip = errors.New("fake roundtrip")
type funcRoundTripper func()
func (fn funcRoundTripper) RoundTrip(*Request) (*Response, error) {
fn()
return nil, errFakeRoundTrip
}
func wantBody(res *Response, err error, want string) error {
if err != nil {
return err
}
slurp, err := io.ReadAll(res.Body)
if err != nil {
return fmt.Errorf("error reading body: %v", err)
}
if string(slurp) != want {
return fmt.Errorf("body = %q; want %q", slurp, want)
}
if err := res.Body.Close(); err != nil {
return fmt.Errorf("body Close = %v", err)
}
return nil
}
func newLocalListener(t *testing.T) net.Listener {
ln, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
ln, err = net.Listen("tcp6", "[::1]:0")
}
if err != nil {
t.Fatal(err)
}
return ln
}
type countCloseReader struct {
n *int
io.Reader
}
func (cr countCloseReader) Close() error {
(*cr.n)++
return nil
}
// rgz is a gzip quine that uncompresses to itself.
var rgz = []byte{
0x1f, 0x8b, 0x08, 0x08, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x72, 0x65, 0x63, 0x75, 0x72, 0x73,
0x69, 0x76, 0x65, 0x00, 0x92, 0xef, 0xe6, 0xe0,
0x60, 0x00, 0x83, 0xa2, 0xd4, 0xe4, 0xd2, 0xa2,
0xe2, 0xcc, 0xb2, 0x54, 0x06, 0x00, 0x00, 0x17,
0x00, 0xe8, 0xff, 0x92, 0xef, 0xe6, 0xe0, 0x60,
0x00, 0x83, 0xa2, 0xd4, 0xe4, 0xd2, 0xa2, 0xe2,
0xcc, 0xb2, 0x54, 0x06, 0x00, 0x00, 0x17, 0x00,
0xe8, 0xff, 0x42, 0x12, 0x46, 0x16, 0x06, 0x00,
0x05, 0x00, 0xfa, 0xff, 0x42, 0x12, 0x46, 0x16,
0x06, 0x00, 0x05, 0x00, 0xfa, 0xff, 0x00, 0x05,
0x00, 0xfa, 0xff, 0x00, 0x14, 0x00, 0xeb, 0xff,
0x42, 0x12, 0x46, 0x16, 0x06, 0x00, 0x05, 0x00,
0xfa, 0xff, 0x00, 0x05, 0x00, 0xfa, 0xff, 0x00,
0x14, 0x00, 0xeb, 0xff, 0x42, 0x88, 0x21, 0xc4,
0x00, 0x00, 0x14, 0x00, 0xeb, 0xff, 0x42, 0x88,
0x21, 0xc4, 0x00, 0x00, 0x14, 0x00, 0xeb, 0xff,
0x42, 0x88, 0x21, 0xc4, 0x00, 0x00, 0x14, 0x00,
0xeb, 0xff, 0x42, 0x88, 0x21, 0xc4, 0x00, 0x00,
0x14, 0x00, 0xeb, 0xff, 0x42, 0x88, 0x21, 0xc4,
0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00,
0x00, 0xff, 0xff, 0x00, 0x17, 0x00, 0xe8, 0xff,
0x42, 0x88, 0x21, 0xc4, 0x00, 0x00, 0x00, 0x00,
0xff, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00,
0x17, 0x00, 0xe8, 0xff, 0x42, 0x12, 0x46, 0x16,
0x06, 0x00, 0x00, 0x00, 0xff, 0xff, 0x01, 0x08,
0x00, 0xf7, 0xff, 0x3d, 0xb1, 0x20, 0x85, 0xfa,
0x00, 0x00, 0x00, 0x42, 0x12, 0x46, 0x16, 0x06,
0x00, 0x00, 0x00, 0xff, 0xff, 0x01, 0x08, 0x00,
0xf7, 0xff, 0x3d, 0xb1, 0x20, 0x85, 0xfa, 0x00,
0x00, 0x00, 0x3d, 0xb1, 0x20, 0x85, 0xfa, 0x00,
0x00, 0x00,
}
// Ensure that a missing status doesn't make the server panic
// See Issue https://golang.org/issues/21701
func TestMissingStatusNoPanic(t *testing.T) {
t.Parallel()
const want = "unknown status code"
ln := newLocalListener(t)
addr := ln.Addr().String()
done := make(chan bool)
fullAddrURL := fmt.Sprintf("http://%s", addr)
raw := "HTTP/1.1 400\r\n" +
"Date: Wed, 30 Aug 2017 19:09:27 GMT\r\n" +
"Content-Type: text/html; charset=utf-8\r\n" +
"Content-Length: 10\r\n" +
"Last-Modified: Wed, 30 Aug 2017 19:02:02 GMT\r\n" +
"Vary: Accept-Encoding\r\n\r\n" +
"Aloha Olaa"
go func() {
defer close(done)
conn, _ := ln.Accept()
if conn != nil {
io.WriteString(conn, raw)
io.ReadAll(conn)
conn.Close()
}
}()
proxyURL, err := url.Parse(fullAddrURL)
if err != nil {
t.Fatalf("proxyURL: %v", err)
}
tr := &Transport{Proxy: ProxyURL(proxyURL)}
req, _ := NewRequest("GET", "https://golang.org/", nil)
res, err, panicked := doFetchCheckPanic(tr, req)
if panicked {
t.Error("panicked, expecting an error")
}
if res != nil && res.Body != nil {
io.Copy(io.Discard, res.Body)
res.Body.Close()
}
if err == nil || !strings.Contains(err.Error(), want) {
t.Errorf("got=%v want=%q", err, want)
}
ln.Close()
<-done
}
func doFetchCheckPanic(tr *Transport, req *Request) (res *Response, err error, panicked bool) {
defer func() {
if r := recover(); r != nil {
panicked = true
}
}()
res, err = tr.RoundTrip(req)
return
}
// Issue 22330: do not allow the response body to be read when the status code
// forbids a response body.
func TestNoBodyOnChunked304Response(t *testing.T) {
defer afterTest(t)
cst := newClientServerTest(t, h1Mode, HandlerFunc(func(w ResponseWriter, r *Request) {
conn, buf, _ := w.(Hijacker).Hijack()
buf.Write([]byte("HTTP/1.1 304 NOT MODIFIED\r\nTransfer-Encoding: chunked\r\n\r\n0\r\n\r\n"))
buf.Flush()
conn.Close()
}))
defer cst.close()
// Our test server above is sending back bogus data after the
// response (the "0\r\n\r\n" part), which causes the Transport
// code to log spam. Disable keep-alives so we never even try
// to reuse the connection.
cst.tr.DisableKeepAlives = true
res, err := cst.c.Get(cst.ts.URL)
if err != nil {
t.Fatal(err)
}
if res.Body != NoBody {
t.Errorf("Unexpected body on 304 response")
}
}
type funcWriter func([]byte) (int, error)
func (f funcWriter) Write(p []byte) (int, error) { return f(p) }
type doneContext struct {
context.Context
err error
}
func (doneContext) Done() <-chan struct{} {
c := make(chan struct{})
close(c)
return c
}
func (d doneContext) Err() error { return d.err }
// Issue 25852: Transport should check whether Context is done early.
func TestTransportCheckContextDoneEarly(t *testing.T) {
tr := &Transport{}
req, _ := NewRequest("GET", "http://fake.example/", nil)
wantErr := errors.New("some error")
req = req.WithContext(doneContext{context.Background(), wantErr})
_, err := tr.RoundTrip(req)
if err != wantErr {
t.Errorf("error = %v; want %v", err, wantErr)
}
}
// Issue 23399: verify that if a client request times out, the Transport's
// conn is closed so that it's not reused.
//
// This is the test variant that times out before the server replies with
// any response headers.
func TestClientTimeoutKillsConn_BeforeHeaders(t *testing.T) {
setParallel(t)
defer afterTest(t)
inHandler := make(chan net.Conn, 1)
handlerReadReturned := make(chan bool, 1)
cst := newClientServerTest(t, h1Mode, HandlerFunc(func(w ResponseWriter, r *Request) {
conn, _, err := w.(Hijacker).Hijack()
if err != nil {
t.Error(err)
return
}
inHandler <- conn
n, err := conn.Read([]byte{0})
if n != 0 || err != io.EOF {
t.Errorf("unexpected Read result: %v, %v", n, err)
}
handlerReadReturned <- true
}))
defer cst.close()
const timeout = 50 * time.Millisecond
cst.c.Timeout = timeout
_, err := cst.c.Get(cst.ts.URL)
if err == nil {
t.Fatal("unexpected Get succeess")
}
select {
case c := <-inHandler:
select {
case <-handlerReadReturned:
// Success.
return
case <-time.After(5 * time.Second):
t.Error("Handler's conn.Read seems to be stuck in Read")
c.Close() // close it to unblock Handler
}
case <-time.After(timeout * 10):
// If we didn't get into the Handler in 50ms, that probably means
// the builder was just slow and the Get failed in that time
// but never made it to the server. That's fine. We'll usually
// test the part above on faster machines.
t.Skip("skipping test on slow builder")
}
}
// Issue 23399: verify that if a client request times out, the Transport's
// conn is closed so that it's not reused.
//
// This is the test variant that has the server send response headers
// first, and time out during the write of the response body.
func TestClientTimeoutKillsConn_AfterHeaders(t *testing.T) {
setParallel(t)
defer afterTest(t)
inHandler := make(chan net.Conn, 1)
handlerResult := make(chan error, 1)
cst := newClientServerTest(t, h1Mode, HandlerFunc(func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Length", "100")
w.(Flusher).Flush()
conn, _, err := w.(Hijacker).Hijack()
if err != nil {
t.Error(err)
return
}
conn.Write([]byte("foo"))
inHandler <- conn
n, err := conn.Read([]byte{0})
// The error should be io.EOF or "read tcp
// 127.0.0.1:35827->127.0.0.1:40290: read: connection
// reset by peer" depending on timing. Really we just
// care that it returns at all. But if it returns with
// data, that's weird.
if n != 0 || err == nil {
handlerResult <- fmt.Errorf("unexpected Read result: %v, %v", n, err)
return
}
handlerResult <- nil
}))
defer cst.close()
// Set Timeout to something very long but non-zero to exercise
// the codepaths that check for it. But rather than wait for it to fire
// (which would make the test slow), we send on the req.Cancel channel instead,
// which happens to exercise the same code paths.
cst.c.Timeout = time.Minute // just to be non-zero, not to hit it.
req, _ := NewRequest("GET", cst.ts.URL, nil)
cancel := make(chan struct{})
req.Cancel = cancel
res, err := cst.c.Do(req)
if err != nil {
select {
case <-inHandler:
t.Fatalf("Get error: %v", err)
default:
// Failed before entering handler. Ignore result.
t.Skip("skipping test on slow builder")
}
}
close(cancel)
got, err := io.ReadAll(res.Body)
if err == nil {
t.Fatalf("unexpected success; read %q, nil", got)
}
select {
case c := <-inHandler:
select {
case err := <-handlerResult:
if err != nil {
t.Errorf("handler: %v", err)
}
return
case <-time.After(5 * time.Second):
t.Error("Handler's conn.Read seems to be stuck in Read")
c.Close() // close it to unblock Handler
}
case <-time.After(5 * time.Second):
t.Fatal("timeout")
}
}
func TestTransportResponseBodyWritableOnProtocolSwitch(t *testing.T) {
setParallel(t)
defer afterTest(t)
done := make(chan struct{})
defer close(done)
cst := newClientServerTest(t, h1Mode, HandlerFunc(func(w ResponseWriter, r *Request) {
conn, _, err := w.(Hijacker).Hijack()
if err != nil {
t.Error(err)
return
}
defer conn.Close()
io.WriteString(conn, "HTTP/1.1 101 Switching Protocols Hi\r\nConnection: upgRADe\r\nUpgrade: foo\r\n\r\nSome buffered data\n")
bs := bufio.NewScanner(conn)
bs.Scan()
fmt.Fprintf(conn, "%s\n", strings.ToUpper(bs.Text()))
<-done
}))
defer cst.close()
req, _ := NewRequest("GET", cst.ts.URL, nil)
req.Header.Set("Upgrade", "foo")
req.Header.Set("Connection", "upgrade")
res, err := cst.c.Do(req)
if err != nil {
t.Fatal(err)
}
if res.StatusCode != 101 {
t.Fatalf("expected 101 switching protocols; got %v, %v", res.Status, res.Header)
}
rwc, ok := res.Body.(io.ReadWriteCloser)
if !ok {
t.Fatalf("expected a ReadWriteCloser; got a %T", res.Body)
}
defer rwc.Close()
bs := bufio.NewScanner(rwc)
if !bs.Scan() {
t.Fatalf("expected readable input")
}
if got, want := bs.Text(), "Some buffered data"; got != want {
t.Errorf("read %q; want %q", got, want)
}
io.WriteString(rwc, "echo\n")
if !bs.Scan() {
t.Fatalf("expected another line")
}
if got, want := bs.Text(), "ECHO"; got != want {
t.Errorf("read %q; want %q", got, want)
}
}
func TestTransportCONNECTBidi(t *testing.T) {
defer afterTest(t)
const target = "backend:443"
cst := newClientServerTest(t, h1Mode, HandlerFunc(func(w ResponseWriter, r *Request) {
if r.Method != "CONNECT" {
t.Errorf("unexpected method %q", r.Method)
w.WriteHeader(500)
return
}
if r.RequestURI != target {
t.Errorf("unexpected CONNECT target %q", r.RequestURI)
w.WriteHeader(500)
return
}
nc, brw, err := w.(Hijacker).Hijack()
if err != nil {
t.Error(err)
return
}
defer nc.Close()
nc.Write([]byte("HTTP/1.1 200 OK\r\n\r\n"))
// Switch to a little protocol that capitalize its input lines:
for {
line, err := brw.ReadString('\n')
if err != nil {
if err != io.EOF {
t.Error(err)
}
return
}
io.WriteString(brw, strings.ToUpper(line))
brw.Flush()
}
}))
defer cst.close()
pr, pw := io.Pipe()
defer pw.Close()
req, err := NewRequest("CONNECT", cst.ts.URL, pr)
if err != nil {
t.Fatal(err)
}
req.URL.Opaque = target
res, err := cst.c.Do(req)
if err != nil {
t.Fatal(err)
}
defer res.Body.Close()
if res.StatusCode != 200 {
t.Fatalf("status code = %d; want 200", res.StatusCode)
}
br := bufio.NewReader(res.Body)
for _, str := range []string{"foo", "bar", "baz"} {
fmt.Fprintf(pw, "%s\n", str)
got, err := br.ReadString('\n')
if err != nil {
t.Fatal(err)
}
got = strings.TrimSpace(got)
want := strings.ToUpper(str)
if got != want {
t.Fatalf("got %q; want %q", got, want)
}
}
}
func TestTransportRequestReplayable(t *testing.T) {
someBody := io.NopCloser(strings.NewReader(""))
tests := []struct {
name string
req *Request
want bool
}{
{
name: "GET",
req: &Request{Method: "GET"},
want: true,
},
{
name: "GET_http.NoBody",
req: &Request{Method: "GET", Body: NoBody},
want: true,
},
{
name: "GET_body",
req: &Request{Method: "GET", Body: someBody},
want: false,
},
{
name: "POST",
req: &Request{Method: "POST"},
want: false,
},
{
name: "POST_idempotency-key",
req: &Request{Method: "POST", Header: Header{"Idempotency-Key": {"x"}}},
want: true,
},
{
name: "POST_x-idempotency-key",
req: &Request{Method: "POST", Header: Header{"X-Idempotency-Key": {"x"}}},
want: true,
},
{
name: "POST_body",
req: &Request{Method: "POST", Header: Header{"Idempotency-Key": {"x"}}, Body: someBody},
want: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := tt.req.ExportIsReplayable()
if got != tt.want {
t.Errorf("replyable = %v; want %v", got, tt.want)
}
})
}
}
// testMockTCPConn is a mock TCP connection used to test that
// ReadFrom is called when sending the request body.
type testMockTCPConn struct {
*net.TCPConn
ReadFromCalled bool
}
func (c *testMockTCPConn) ReadFrom(r io.Reader) (int64, error) {
c.ReadFromCalled = true
return c.TCPConn.ReadFrom(r)
}
func TestTransportRequestWriteRoundTrip(t *testing.T) {
nBytes := int64(1 << 10)
newFileFunc := func() (r io.Reader, done func(), err error) {
f, err := os.CreateTemp("", "net-http-newfilefunc")
if err != nil {
return nil, nil, err
}
// Write some bytes to the file to enable reading.
if _, err := io.CopyN(f, rand.Reader, nBytes); err != nil {
return nil, nil, fmt.Errorf("failed to write data to file: %v", err)
}
if _, err := f.Seek(0, 0); err != nil {
return nil, nil, fmt.Errorf("failed to seek to front: %v", err)
}
done = func() {
f.Close()
os.Remove(f.Name())
}
return f, done, nil
}
newBufferFunc := func() (io.Reader, func(), error) {
return bytes.NewBuffer(make([]byte, nBytes)), func() {}, nil
}
cases := []struct {
name string
readerFunc func() (io.Reader, func(), error)
contentLength int64
expectedReadFrom bool
}{
{
name: "file, length",
readerFunc: newFileFunc,
contentLength: nBytes,
expectedReadFrom: true,
},
{
name: "file, no length",
readerFunc: newFileFunc,
},
{
name: "file, negative length",
readerFunc: newFileFunc,
contentLength: -1,
},
{
name: "buffer",
contentLength: nBytes,
readerFunc: newBufferFunc,
},
{
name: "buffer, no length",
readerFunc: newBufferFunc,
},
{
name: "buffer, length -1",
contentLength: -1,
readerFunc: newBufferFunc,
},
}
for _, tc := range cases {
t.Run(tc.name, func(t *testing.T) {
r, cleanup, err := tc.readerFunc()
if err != nil {
t.Fatal(err)
}
defer cleanup()
tConn := &testMockTCPConn{}
trFunc := func(tr *Transport) {
tr.DialContext = func(ctx context.Context, network, addr string) (net.Conn, error) {
var d net.Dialer
conn, err := d.DialContext(ctx, network, addr)
if err != nil {
return nil, err
}
tcpConn, ok := conn.(*net.TCPConn)
if !ok {
return nil, fmt.Errorf("%s/%s does not provide a *net.TCPConn", network, addr)
}
tConn.TCPConn = tcpConn
return tConn, nil
}
}
cst := newClientServerTest(
t,
h1Mode,
HandlerFunc(func(w ResponseWriter, r *Request) {
io.Copy(io.Discard, r.Body)
r.Body.Close()
w.WriteHeader(200)
}),
trFunc,
)
defer cst.close()
req, err := NewRequest("PUT", cst.ts.URL, r)
if err != nil {
t.Fatal(err)
}
req.ContentLength = tc.contentLength
req.Header.Set("Content-Type", "application/octet-stream")
resp, err := cst.c.Do(req)
if err != nil {
t.Fatal(err)
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
t.Fatalf("status code = %d; want 200", resp.StatusCode)
}
if !tConn.ReadFromCalled && tc.expectedReadFrom {
t.Fatalf("did not call ReadFrom")
}
if tConn.ReadFromCalled && !tc.expectedReadFrom {
t.Fatalf("ReadFrom was unexpectedly invoked")
}
})
}
}
func TestTransportClone(t *testing.T) {
tr := &Transport{
Proxy: func(*Request) (*url.URL, error) { panic("") },
DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) { panic("") },
Dial: func(network, addr string) (net.Conn, error) { panic("") },
DialTLS: func(network, addr string) (net.Conn, error) { panic("") },
DialTLSContext: func(ctx context.Context, network, addr string) (net.Conn, error) { panic("") },
TLSClientConfig: new(tls.Config),
TLSHandshakeTimeout: time.Second,
DisableKeepAlives: true,
DisableCompression: true,
MaxIdleConns: 1,
MaxIdleConnsPerHost: 1,
MaxConnsPerHost: 1,
IdleConnTimeout: time.Second,
ResponseHeaderTimeout: time.Second,
ExpectContinueTimeout: time.Second,
ProxyConnectHeader: Header{},
GetProxyConnectHeader: func(context.Context, *url.URL, string) (Header, error) { return nil, nil },
MaxResponseHeaderBytes: 1,
ForceAttemptHTTP2: true,
TLSNextProto: map[string]func(authority string, c *tls.Conn) RoundTripper{
"foo": func(authority string, c *tls.Conn) RoundTripper { panic("") },
},
ReadBufferSize: 1,
WriteBufferSize: 1,
}
tr2 := tr.Clone()
rv := reflect.ValueOf(tr2).Elem()
rt := rv.Type()
for i := 0; i < rt.NumField(); i++ {
sf := rt.Field(i)
if !token.IsExported(sf.Name) {
continue
}
if rv.Field(i).IsZero() {
t.Errorf("cloned field t2.%s is zero", sf.Name)
}
}
if _, ok := tr2.TLSNextProto["foo"]; !ok {
t.Errorf("cloned Transport lacked TLSNextProto 'foo' key")
}
// But test that a nil TLSNextProto is kept nil:
tr = new(Transport)
tr2 = tr.Clone()
if tr2.TLSNextProto != nil {
t.Errorf("Transport.TLSNextProto unexpected non-nil")
}
}
func TestIs408(t *testing.T) {
tests := []struct {
in string
want bool
}{
{"HTTP/1.0 408", true},
{"HTTP/1.1 408", true},
{"HTTP/1.8 408", true},
{"HTTP/2.0 408", false}, // maybe h2c would do this? but false for now.
{"HTTP/1.1 408 ", true},
{"HTTP/1.1 40", false},
{"http/1.0 408", false},
{"HTTP/1-1 408", false},
}
for _, tt := range tests {
if got := Export_is408Message([]byte(tt.in)); got != tt.want {
t.Errorf("is408Message(%q) = %v; want %v", tt.in, got, tt.want)
}
}
}
func TestTransportIgnores408(t *testing.T) {
// Not parallel. Relies on mutating the log package's global Output.
defer log.SetOutput(log.Writer())
var logout bytes.Buffer
log.SetOutput(&logout)
defer afterTest(t)
const target = "backend:443"
cst := newClientServerTest(t, h1Mode, HandlerFunc(func(w ResponseWriter, r *Request) {
nc, _, err := w.(Hijacker).Hijack()
if err != nil {
t.Error(err)
return
}
defer nc.Close()
nc.Write([]byte("HTTP/1.1 200 OK\r\nContent-Length: 2\r\n\r\nok"))
nc.Write([]byte("HTTP/1.1 408 bye\r\n")) // changing 408 to 409 makes test fail
}))
defer cst.close()
req, err := NewRequest("GET", cst.ts.URL, nil)
if err != nil {
t.Fatal(err)
}
res, err := cst.c.Do(req)
if err != nil {
t.Fatal(err)
}
slurp, err := io.ReadAll(res.Body)
if err != nil {
t.Fatal(err)
}
if err != nil {
t.Fatal(err)
}
if string(slurp) != "ok" {
t.Fatalf("got %q; want ok", slurp)
}
t0 := time.Now()
for i := 0; i < 50; i++ {
time.Sleep(time.Duration(i) * 5 * time.Millisecond)
if cst.tr.IdleConnKeyCountForTesting() == 0 {
if got := logout.String(); got != "" {
t.Fatalf("expected no log output; got: %s", got)
}
return
}
}
t.Fatalf("timeout after %v waiting for Transport connections to die off", time.Since(t0))
}
func TestInvalidHeaderResponse(t *testing.T) {
setParallel(t)
defer afterTest(t)
cst := newClientServerTest(t, h1Mode, HandlerFunc(func(w ResponseWriter, r *Request) {
conn, buf, _ := w.(Hijacker).Hijack()
buf.Write([]byte("HTTP/1.1 200 OK\r\n" +
"Date: Wed, 30 Aug 2017 19:09:27 GMT\r\n" +
"Content-Type: text/html; charset=utf-8\r\n" +
"Content-Length: 0\r\n" +
"Foo : bar\r\n\r\n"))
buf.Flush()
conn.Close()
}))
defer cst.close()
res, err := cst.c.Get(cst.ts.URL)
if err != nil {
t.Fatal(err)
}
defer res.Body.Close()
if v := res.Header.Get("Foo"); v != "" {
t.Errorf(`unexpected "Foo" header: %q`, v)
}
if v := res.Header.Get("Foo "); v != "bar" {
t.Errorf(`bad "Foo " header value: %q, want %q`, v, "bar")
}
}
type bodyCloser bool
func (bc *bodyCloser) Close() error {
*bc = true
return nil
}
func (bc *bodyCloser) Read(b []byte) (n int, err error) {
return 0, io.EOF
}
// Issue 35015: ensure that Transport closes the body on any error
// with an invalid request, as promised by Client.Do docs.
func TestTransportClosesBodyOnInvalidRequests(t *testing.T) {
cst := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
t.Errorf("Should not have been invoked")
}))
defer cst.Close()
u, _ := url.Parse(cst.URL)
tests := []struct {
name string
req *Request
wantErr string
}{
{
name: "invalid method",
req: &Request{
Method: " ",
URL: u,
},
wantErr: `invalid method " "`,
},
{
name: "nil URL",
req: &Request{
Method: "GET",
},
wantErr: `nil Request.URL`,
},
{
name: "invalid header key",
req: &Request{
Method: "GET",
Header: Header{"💡": {"emoji"}},
URL: u,
},
wantErr: `invalid header field name "💡"`,
},
{
name: "invalid header value",
req: &Request{
Method: "POST",
Header: Header{"key": {"\x19"}},
URL: u,
},
wantErr: `invalid header field value for "key"`,
},
{
name: "non HTTP(s) scheme",
req: &Request{
Method: "POST",
URL: &url.URL{Scheme: "faux"},
},
wantErr: `unsupported protocol scheme "faux"`,
},
{
name: "no Host in URL",
req: &Request{
Method: "POST",
URL: &url.URL{Scheme: "http"},
},
wantErr: `no Host in request URL`,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
var bc bodyCloser
req := tt.req
req.Body = &bc
_, err := DefaultClient.Do(tt.req)
if err == nil {
t.Fatal("Expected an error")
}
if !bc {
t.Fatal("Expected body to have been closed")
}
if g, w := err.Error(), tt.wantErr; !strings.HasSuffix(g, w) {
t.Fatalf("Error mismatch: %q does not end with %q", g, w)
}
})
}
}
// breakableConn is a net.Conn wrapper with a Write method
// that will fail when its brokenState is true.
type breakableConn struct {
net.Conn
*brokenState
}
type brokenState struct {
sync.Mutex
broken bool
}
func (w *breakableConn) Write(b []byte) (n int, err error) {
w.Lock()
defer w.Unlock()
if w.broken {
return 0, errors.New("some write error")
}
return w.Conn.Write(b)
}
// Issue 34978: don't cache a broken HTTP/2 connection
func TestDontCacheBrokenHTTP2Conn(t *testing.T) {
cst := newClientServerTest(t, h2Mode, HandlerFunc(func(w ResponseWriter, r *Request) {}), optQuietLog)
defer cst.close()
var brokenState brokenState
const numReqs = 5
var numDials, gotConns uint32 // atomic
cst.tr.Dial = func(netw, addr string) (net.Conn, error) {
atomic.AddUint32(&numDials, 1)
c, err := net.Dial(netw, addr)
if err != nil {
t.Errorf("unexpected Dial error: %v", err)
return nil, err
}
return &breakableConn{c, &brokenState}, err
}
for i := 1; i <= numReqs; i++ {
brokenState.Lock()
brokenState.broken = false
brokenState.Unlock()
// doBreak controls whether we break the TCP connection after the TLS
// handshake (before the HTTP/2 handshake). We test a few failures
// in a row followed by a final success.
doBreak := i != numReqs
ctx := httptrace.WithClientTrace(context.Background(), &httptrace.ClientTrace{
GotConn: func(info httptrace.GotConnInfo) {
t.Logf("got conn: %v, reused=%v, wasIdle=%v, idleTime=%v", info.Conn.LocalAddr(), info.Reused, info.WasIdle, info.IdleTime)
atomic.AddUint32(&gotConns, 1)
},
TLSHandshakeDone: func(cfg tls.ConnectionState, err error) {
brokenState.Lock()
defer brokenState.Unlock()
if doBreak {
brokenState.broken = true
}
},
})
req, err := NewRequestWithContext(ctx, "GET", cst.ts.URL, nil)
if err != nil {
t.Fatal(err)
}
_, err = cst.c.Do(req)
if doBreak != (err != nil) {
t.Errorf("for iteration %d, doBreak=%v; unexpected error %v", i, doBreak, err)
}
}
if got, want := atomic.LoadUint32(&gotConns), 1; int(got) != want {
t.Errorf("GotConn calls = %v; want %v", got, want)
}
if got, want := atomic.LoadUint32(&numDials), numReqs; int(got) != want {
t.Errorf("Dials = %v; want %v", got, want)
}
}
// Issue 34941
// When the client has too many concurrent requests on a single connection,
// http.http2noCachedConnError is reported on multiple requests. There should
// only be one decrement regardless of the number of failures.
func TestTransportDecrementConnWhenIdleConnRemoved(t *testing.T) {
defer afterTest(t)
CondSkipHTTP2(t)
h := HandlerFunc(func(w ResponseWriter, r *Request) {
_, err := w.Write([]byte("foo"))
if err != nil {
t.Fatalf("Write: %v", err)
}
})
ts := httptest.NewUnstartedServer(h)
ts.EnableHTTP2 = true
ts.StartTLS()
defer ts.Close()
c := ts.Client()
tr := c.Transport.(*Transport)
tr.MaxConnsPerHost = 1
if err := ExportHttp2ConfigureTransport(tr); err != nil {
t.Fatalf("ExportHttp2ConfigureTransport: %v", err)
}
errCh := make(chan error, 300)
doReq := func() {
resp, err := c.Get(ts.URL)
if err != nil {
errCh <- fmt.Errorf("request failed: %v", err)
return
}
defer resp.Body.Close()
_, err = io.ReadAll(resp.Body)
if err != nil {
errCh <- fmt.Errorf("read body failed: %v", err)
}
}
var wg sync.WaitGroup
for i := 0; i < 300; i++ {
wg.Add(1)
go func() {
defer wg.Done()
doReq()
}()
}
wg.Wait()
close(errCh)
for err := range errCh {
t.Errorf("error occurred: %v", err)
}
}
// Issue 36820
// Test that we use the older backward compatible cancellation protocol
// when a RoundTripper is registered via RegisterProtocol.
func TestAltProtoCancellation(t *testing.T) {
defer afterTest(t)
tr := &Transport{}
c := &Client{
Transport: tr,
Timeout: time.Millisecond,
}
tr.RegisterProtocol("timeout", timeoutProto{})
_, err := c.Get("timeout://bar.com/path")
if err == nil {
t.Error("request unexpectedly succeeded")
} else if !strings.Contains(err.Error(), timeoutProtoErr.Error()) {
t.Errorf("got error %q, does not contain expected string %q", err, timeoutProtoErr)
}
}
var timeoutProtoErr = errors.New("canceled as expected")
type timeoutProto struct{}
func (timeoutProto) RoundTrip(req *Request) (*Response, error) {
select {
case <-req.Cancel:
return nil, timeoutProtoErr
case <-time.After(5 * time.Second):
return nil, errors.New("request was not canceled")
}
}
type roundTripFunc func(r *Request) (*Response, error)
func (f roundTripFunc) RoundTrip(r *Request) (*Response, error) { return f(r) }
// Issue 32441: body is not reset after ErrSkipAltProtocol
func TestIssue32441(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
if n, _ := io.Copy(io.Discard, r.Body); n == 0 {
t.Error("body length is zero")
}
}))
defer ts.Close()
c := ts.Client()
c.Transport.(*Transport).RegisterProtocol("http", roundTripFunc(func(r *Request) (*Response, error) {
// Draining body to trigger failure condition on actual request to server.
if n, _ := io.Copy(io.Discard, r.Body); n == 0 {
t.Error("body length is zero during round trip")
}
return nil, ErrSkipAltProtocol
}))
if _, err := c.Post(ts.URL, "application/octet-stream", bytes.NewBufferString("data")); err != nil {
t.Error(err)
}
}
// Issue 39017. Ensure that HTTP/1 transports reject Content-Length headers
// that contain a sign (eg. "+3"), per RFC 2616, Section 14.13.
func TestTransportRejectsSignInContentLength(t *testing.T) {
cst := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
w.Header().Set("Content-Length", "+3")
w.Write([]byte("abc"))
}))
defer cst.Close()
c := cst.Client()
res, err := c.Get(cst.URL)
if err == nil || res != nil {
t.Fatal("Expected a non-nil error and a nil http.Response")
}
if got, want := err.Error(), `bad Content-Length "+3"`; !strings.Contains(got, want) {
t.Fatalf("Error mismatch\nGot: %q\nWanted substring: %q", got, want)
}
}
// dumpConn is a net.Conn which writes to Writer and reads from Reader
type dumpConn struct {
io.Writer
io.Reader
}
func (c *dumpConn) Close() error { return nil }
func (c *dumpConn) LocalAddr() net.Addr { return nil }
func (c *dumpConn) RemoteAddr() net.Addr { return nil }
func (c *dumpConn) SetDeadline(t time.Time) error { return nil }
func (c *dumpConn) SetReadDeadline(t time.Time) error { return nil }
func (c *dumpConn) SetWriteDeadline(t time.Time) error { return nil }
// delegateReader is a reader that delegates to another reader,
// once it arrives on a channel.
type delegateReader struct {
c chan io.Reader
r io.Reader // nil until received from c
}
func (r *delegateReader) Read(p []byte) (int, error) {
if r.r == nil {
var ok bool
if r.r, ok = <-r.c; !ok {
return 0, errors.New("delegate closed")
}
}
return r.r.Read(p)
}
func testTransportRace(req *Request) {
save := req.Body
pr, pw := io.Pipe()
defer pr.Close()
defer pw.Close()
dr := &delegateReader{c: make(chan io.Reader)}
t := &Transport{
Dial: func(net, addr string) (net.Conn, error) {
return &dumpConn{pw, dr}, nil
},
}
defer t.CloseIdleConnections()
quitReadCh := make(chan struct{})
// Wait for the request before replying with a dummy response:
go func() {
defer close(quitReadCh)
req, err := ReadRequest(bufio.NewReader(pr))
if err == nil {
// Ensure all the body is read; otherwise
// we'll get a partial dump.
io.Copy(io.Discard, req.Body)
req.Body.Close()
}
select {
case dr.c <- strings.NewReader("HTTP/1.1 204 No Content\r\nConnection: close\r\n\r\n"):
case quitReadCh <- struct{}{}:
// Ensure delegate is closed so Read doesn't block forever.
close(dr.c)
}
}()
t.RoundTrip(req)
// Ensure the reader returns before we reset req.Body to prevent
// a data race on req.Body.
pw.Close()
<-quitReadCh
req.Body = save
}
// Issue 37669
// Test that a cancellation doesn't result in a data race due to the writeLoop
// goroutine being left running, if the caller mutates the processed Request
// upon completion.
func TestErrorWriteLoopRace(t *testing.T) {
if testing.Short() {
return
}
t.Parallel()
for i := 0; i < 1000; i++ {
delay := time.Duration(mrand.Intn(5)) * time.Millisecond
ctx, cancel := context.WithTimeout(context.Background(), delay)
defer cancel()
r := bytes.NewBuffer(make([]byte, 10000))
req, err := NewRequestWithContext(ctx, MethodPost, "http://example.com", r)
if err != nil {
t.Fatal(err)
}
testTransportRace(req)
}
}
// Issue 41600
// Test that a new request which uses the connection of an active request
// cannot cause it to be canceled as well.
func TestCancelRequestWhenSharingConnection(t *testing.T) {
reqc := make(chan chan struct{}, 2)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, req *Request) {
ch := make(chan struct{}, 1)
reqc <- ch
<-ch
w.Header().Add("Content-Length", "0")
}))
defer ts.Close()
client := ts.Client()
transport := client.Transport.(*Transport)
transport.MaxIdleConns = 1
transport.MaxConnsPerHost = 1
var wg sync.WaitGroup
wg.Add(1)
putidlec := make(chan chan struct{})
go func() {
defer wg.Done()
ctx := httptrace.WithClientTrace(context.Background(), &httptrace.ClientTrace{
PutIdleConn: func(error) {
// Signal that the idle conn has been returned to the pool,
// and wait for the order to proceed.
ch := make(chan struct{})
putidlec <- ch
<-ch
},
})
req, _ := NewRequestWithContext(ctx, "GET", ts.URL, nil)
res, err := client.Do(req)
if err == nil {
res.Body.Close()
}
if err != nil {
t.Errorf("request 1: got err %v, want nil", err)
}
}()
// Wait for the first request to receive a response and return the
// connection to the idle pool.
r1c := <-reqc
close(r1c)
idlec := <-putidlec
wg.Add(1)
cancelctx, cancel := context.WithCancel(context.Background())
go func() {
defer wg.Done()
req, _ := NewRequestWithContext(cancelctx, "GET", ts.URL, nil)
res, err := client.Do(req)
if err == nil {
res.Body.Close()
}
if !errors.Is(err, context.Canceled) {
t.Errorf("request 2: got err %v, want Canceled", err)
}
}()
// Wait for the second request to arrive at the server, and then cancel
// the request context.
r2c := <-reqc
cancel()
// Give the cancellation a moment to take effect, and then unblock the first request.
time.Sleep(1 * time.Millisecond)
close(idlec)
close(r2c)
wg.Wait()
}
func TestHandlerAbortRacesBodyRead(t *testing.T) {
setParallel(t)
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(rw ResponseWriter, req *Request) {
go io.Copy(io.Discard, req.Body)
panic(ErrAbortHandler)
}))
defer ts.Close()
var wg sync.WaitGroup
for i := 0; i < 2; i++ {
wg.Add(1)
go func() {
defer wg.Done()
for j := 0; j < 10; j++ {
const reqLen = 6 * 1024 * 1024
req, _ := NewRequest("POST", ts.URL, &io.LimitedReader{R: neverEnding('x'), N: reqLen})
req.ContentLength = reqLen
resp, _ := ts.Client().Transport.RoundTrip(req)
if resp != nil {
resp.Body.Close()
}
}
}()
}
wg.Wait()
}