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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
package http_test
import (
"bufio"
"bytes"
"compress/gzip"
"crypto/rand"
"crypto/tls"
"errors"
"fmt"
"io"
"io/ioutil"
"log"
"net"
"net/http"
. "net/http"
"net/http/httptest"
"net/url"
"os"
"runtime"
"strconv"
"strings"
"sync"
"testing"
"time"
)
// 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))
})
// 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))
}
}
}
// 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()
for _, disableKeepAlive := range []bool{false, true} {
tr := &Transport{DisableKeepAlives: disableKeepAlive}
defer tr.CloseIdleConnections()
c := &Client{Transport: tr}
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 := ioutil.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)
for _, connectionClose := range []bool{false, true} {
tr := &Transport{
Dial: testDial,
}
c := &Client{Transport: tr}
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 := ioutil.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)
}
func TestTransportConnectionCloseOnRequest(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(hostPortHandler)
defer ts.Close()
connSet, testDial := makeTestDial(t)
for _, connectionClose := range []bool{false, true} {
tr := &Transport{
Dial: testDial,
}
c := &Client{Transport: tr}
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 = connectionClose
res, err := c.Do(req)
if err != nil {
t.Fatalf("error in connectionClose=%v, req #%d, Do: %v", connectionClose, n, err)
}
if got, want := res.Header.Get("X-Saw-Close"), fmt.Sprint(connectionClose); got != want {
t.Errorf("For connectionClose = %v; handler's X-Saw-Close was %v; want %v",
connectionClose, got, !connectionClose)
}
body, err := ioutil.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)
}
// if the Transport's DisableKeepAlives is set, all requests should
// send Connection: close.
func TestTransportConnectionCloseOnRequestDisableKeepAlive(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(hostPortHandler)
defer ts.Close()
tr := &Transport{
DisableKeepAlives: true,
}
c := &Client{Transport: tr}
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 ")
}
}
func TestTransportIdleCacheKeys(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(hostPortHandler)
defer ts.Close()
tr := &Transport{DisableKeepAlives: false}
c := &Client{Transport: tr}
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)
}
ioutil.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.(http.Flusher).Flush()
} else {
w.Header().Set("Content-Type", 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 := http.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)
resch := make(chan string)
gotReq := make(chan bool)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
gotReq <- true
msg := <-resch
_, err := w.Write([]byte(msg))
if err != nil {
t.Fatalf("Write: %v", err)
}
}))
defer ts.Close()
maxIdleConns := 2
tr := &Transport{DisableKeepAlives: false, MaxIdleConnsPerHost: maxIdleConns}
c := &Client{Transport: tr}
// 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() {
resp, err := c.Get(ts.URL)
if err != nil {
t.Error(err)
return
}
if _, err := ioutil.ReadAll(resp.Body); err != nil {
t.Errorf("ReadAll: %v", err)
return
}
donech <- true
}
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)
}
cacheKey := "|http|" + ts.Listener.Addr().String()
if keys[0] != cacheKey {
t.Fatalf("Expected idle cache key %q; got %q", cacheKey, keys[0])
}
if e, g := 1, tr.IdleConnCountForTesting(cacheKey); e != g {
t.Errorf("after first response, expected %d idle conns; got %d", e, g)
}
resch <- "res2"
<-donech
if e, g := 2, tr.IdleConnCountForTesting(cacheKey); e != g {
t.Errorf("after second response, expected %d idle conns; got %d", e, g)
}
resch <- "res3"
<-donech
if e, g := maxIdleConns, tr.IdleConnCountForTesting(cacheKey); e != g {
t.Errorf("after third response, still expected %d idle conns; got %d", e, g)
}
}
func TestTransportServerClosingUnexpectedly(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(hostPortHandler)
defer ts.Close()
tr := &Transport{}
c := &Client{Transport: tr}
fetch := func(n, retries int) string {
condFatalf := func(format string, arg ...interface{}) {
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 := ioutil.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)
ts.CloseClientConnections() // surprise!
// This test has an expected race. Sleeping for 25 ms prevents
// it on most fast machines, causing the next fetch() call to
// succeed quickly. But if we do get errors, fetch() will retry 5
// times with some delays between.
time.Sleep(25 * time.Millisecond)
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 http://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()
tr := &Transport{DisableKeepAlives: false}
c := &Client{Transport: tr}
defer tr.CloseIdleConnections()
// 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 emphemeral 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()
}
activityc <- true
}
}()
}
// Make sure all the request come back, one way or another.
for i := 0; i < numClients*reqsPerClient; i++ {
select {
case <-activityc:
case <-time.After(5 * time.Second):
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()
tr := &Transport{DisableKeepAlives: false}
c := &Client{Transport: tr}
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 := ioutil.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()
tr := &Transport{DisableKeepAlives: false}
c := &Client{Transport: tr}
res1, err := c.Head(ts.URL)
if err != nil {
t.Fatalf("request 1 error: %v", err)
}
res2, err := c.Head(ts.URL)
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) {
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()
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 := DefaultTransport.RoundTrip(req)
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 = ioutil.ReadAll(r)
res.Body.Close()
} else {
body, err = ioutil.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) {
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()
for _, chunked := range []string{"1", "0"} {
c := &Client{Transport: &Transport{}}
// 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 := ioutil.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.
c := &Client{Transport: &Transport{}}
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)
}
}
func TestTransportProxy(t *testing.T) {
defer afterTest(t)
ch := make(chan string, 1)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
ch <- "real server"
}))
defer ts.Close()
proxy := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
ch <- "proxy for " + r.URL.String()
}))
defer proxy.Close()
pu, err := url.Parse(proxy.URL)
if err != nil {
t.Fatal(err)
}
c := &Client{Transport: &Transport{Proxy: ProxyURL(pu)}}
c.Head(ts.URL)
got := <-ch
want := "proxy for " + ts.URL + "/"
if got != want {
t.Errorf("want %q, got %q", want, got)
}
}
// 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 := &Client{Transport: &Transport{}}
res, err := c.Get(ts.URL)
if err != nil {
t.Fatal(err)
}
body, err := ioutil.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()
tr := &Transport{}
defer tr.CloseIdleConnections()
c := &Client{Transport: tr}
res, err := c.Get(ts.URL)
if err != nil {
t.Fatal(err)
}
defer res.Body.Close()
_, err = ioutil.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)
}
}
// tests that persistent goroutine connections shut down when no longer desired.
func TestTransportPersistConnLeak(t *testing.T) {
if runtime.GOOS == "plan9" {
t.Skip("skipping test; see http://golang.org/issue/7237")
}
defer afterTest(t)
gotReqCh := make(chan bool)
unblockCh := make(chan bool)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
gotReqCh <- true
<-unblockCh
w.Header().Set("Content-Length", "0")
w.WriteHeader(204)
}))
defer ts.Close()
tr := &Transport{}
c := &Client{Transport: tr}
n0 := runtime.NumGoroutine()
const numReq = 25
didReqCh := make(chan bool)
for i := 0; i < numReq; i++ {
go func() {
res, err := c.Get(ts.URL)
didReqCh <- true
if err != nil {
t.Errorf("client fetch error: %v", err)
return
}
res.Body.Close()
}()
}
// Wait for all goroutines to be stuck in the Handler.
for i := 0; i < numReq; i++ {
<-gotReqCh
}
nhigh := runtime.NumGoroutine()
// Tell all handlers to unblock and reply.
for i := 0; i < numReq; i++ {
unblockCh <- true
}
// Wait for all HTTP clients to be done.
for i := 0; i < numReq; i++ {
<-didReqCh
}
tr.CloseIdleConnections()
time.Sleep(100 * time.Millisecond)
runtime.GC()
runtime.GC() // even more.
nfinal := runtime.NumGoroutine()
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) {
if runtime.GOOS == "plan9" {
t.Skip("skipping test; see http://golang.org/issue/7237")
}
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
}))
defer ts.Close()
tr := &Transport{}
c := &Client{Transport: tr}
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()
time.Sleep(400 * time.Millisecond)
runtime.GC()
nfinal := runtime.NumGoroutine()
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")
}
}
// This used to crash; http://golang.org/issue/3266
func TestTransportIdleConnCrash(t *testing.T) {
defer afterTest(t)
tr := &Transport{}
c := &Client{Transport: tr}
unblockCh := make(chan bool, 1)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
<-unblockCh
tr.CloseIdleConnections()
}))
defer ts.Close()
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()
tr := &Transport{}
c := &Client{Transport: tr}
res, err := c.Get(ts.URL)
if err != nil {
t.Fatal(err)
}
defer res.Body.Close()
bs, err := ioutil.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) {
defer afterTest(t)
const deniedMsg = "sorry, denied."
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
Error(w, deniedMsg, StatusUnauthorized)
}))
defer ts.Close()
tr := &Transport{}
c := &Client{Transport: tr}
res, err := c.Post(ts.URL, "application/octet-stream", neverEnding('a'))
if err != nil {
t.Errorf("Post: %v", err)
return
}
got, err := ioutil.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 http://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()
for _, closeBody := range []bool{true, false} {
c := &Client{Transport: &Transport{}}
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) {
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)
tr := &Transport{}
defer tr.CloseIdleConnections()
c := &Client{Transport: tr}
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 {
t.Errorf("error on req %s: %v", req, err)
wg.Done()
continue
}
all, err := ioutil.ReadAll(res.Body)
if err != nil {
t.Errorf("read error on req %s: %v", req, err)
wg.Done()
continue
}
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) {
if runtime.GOOS == "plan9" {
t.Skip("skipping test; see http://golang.org/issue/7237")
}
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)
timeout := 100 * time.Millisecond
client := &Client{
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
},
DisableKeepAlives: true,
},
}
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 := client.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(ioutil.Discard, sres.Body)
if err == nil {
t.Errorf("Unexpected successful copy")
break
}
}
if debug {
println("tests complete; waiting for handlers to finish")
}
ts.Close()
}
func TestIssue4191_InfiniteGetToPutTimeout(t *testing.T) {
if runtime.GOOS == "plan9" {
t.Skip("skipping test; see http://golang.org/issue/7237")
}
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(ioutil.Discard, r.Body)
})
ts := httptest.NewServer(mux)
timeout := 100 * time.Millisecond
client := &Client{
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
},
DisableKeepAlives: true,
},
}
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 := client.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 = client.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) {
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()
tr := &Transport{
ResponseHeaderTimeout: 500 * time.Millisecond,
}
defer tr.CloseIdleConnections()
c := &Client{Transport: tr}
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 {
res, err := c.Get(ts.URL + tt.path)
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) {
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)
tr := &Transport{}
defer tr.CloseIdleConnections()
c := &Client{Transport: tr}
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 := ioutil.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 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")
inDial <- true
<-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:
case <-time.After(5 * time.Second):
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)
}
}
// 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()
tr := &Transport{}
defer tr.CloseIdleConnections()
c := &Client{Transport: tr}
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: ioutil.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 := ioutil.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)
}
}
func TestTransportSocketLateBinding(t *testing.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)
tr := &Transport{
Dial: func(n, addr string) (net.Conn, error) {
if <-dialGate {
return net.Dial(n, addr)
}
return nil, errors.New("manually closed")
},
DisableKeepAlives: false,
}
defer tr.CloseIdleConnections()
c := &Client{
Transport: tr,
}
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(ioutil.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 := ioutil.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) {
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 = ioutil.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)
}
// And some other informational 1xx but non-100 responses, to test
// we return them but don't re-use the connection.
for i := 1; i <= numReqs; i++ {
req, _ := NewRequest("POST", "http://other.tld/", strings.NewReader(reqBody(i)))
req.Header.Set("X-Want-Response-Code", "123 Sesame Street")
testResponse(req, fmt.Sprintf("123, %d/%d", i, numReqs), 123)
}
}
type proxyFromEnvTest struct {
req string // URL to fetch; blank means "http://example.com"
env string // HTTP_PROXY
httpsenv string // HTTPS_PROXY
noenv string // NO_RPXY
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)
}
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"},
// 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"},
{want: "<nil>"},
{noenv: "example.com", req: "http://example.com/", env: "proxy", want: "<nil>"},
{noenv: ".example.com", req: "http://example.com/", env: "proxy", want: "<nil>"},
{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 TestProxyFromEnvironment(t *testing.T) {
ResetProxyEnv()
for _, tt := range proxyFromEnvTests {
os.Setenv("HTTP_PROXY", tt.env)
os.Setenv("HTTPS_PROXY", tt.httpsenv)
os.Setenv("NO_PROXY", tt.noenv)
ResetCachedEnvironment()
reqURL := tt.req
if reqURL == "" {
reqURL = "http://example.com"
}
req, _ := NewRequest("GET", reqURL, nil)
url, err := ProxyFromEnvironment(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)
continue
}
if got := fmt.Sprintf("%s", url); got != tt.want {
t.Errorf("%v: got URL = %q, want %q", tt, url, tt.want)
}
}
}
func TestIdleConnChannelLeak(t *testing.T) {
var mu sync.Mutex
var n int
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
mu.Lock()
n++
mu.Unlock()
}))
defer ts.Close()
tr := &Transport{
Dial: func(netw, addr string) (net.Conn, error) {
return net.Dial(netw, ts.Listener.Addr().String())
},
}
defer tr.CloseIdleConnections()
c := &Client{Transport: tr}
// First, without keep-alives.
for _, disableKeep := range []bool{true, false} {
tr.DisableKeepAlives = disableKeep
for i := 0; i < 5; i++ {
_, err := c.Get(fmt.Sprintf("http://foo-host-%d.tld/", i))
if err != nil {
t.Fatal(err)
}
}
if got := tr.IdleConnChMapSizeForTesting(); got != 0 {
t.Fatalf("ForDisableKeepAlives = %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(http.HandlerFunc(func(w ResponseWriter, r *Request) {
io.Copy(ioutil.Discard, r.Body)
}))
defer ts.Close()
tr := &Transport{}
defer tr.CloseIdleConnections()
cl := &Client{Transport: tr}
closes := 0
res, err := cl.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)
if runtime.GOOS == "windows" {
t.Skip("skipping flaky test on Windows; golang.org/issue/7634")
}
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()
tr := &Transport{
TLSClientConfig: &tls.Config{
InsecureSkipVerify: true,
},
}
defer tr.CloseIdleConnections()
client := &Client{Transport: tr}
var nSuccess = 0
var errs []error
const trials = 20
for i := 0; i < trials; i++ {
tr.CloseIdleConnections()
res, err := client.Get(ts.URL + "/keep-alive-then-die")
if err != nil {
t.Fatal(err)
}
<-closedc
slurp, err := ioutil.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 = client.Get(ts.URL + "/")
if err != nil {
errs = append(errs, err)
continue
}
slurp, err = ioutil.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) {
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(ioutil.Discard, conn)
}))
defer ts.Close()
tr := &Transport{}
defer tr.CloseIdleConnections()
client := &Client{Transport: tr}
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 := client.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 = client.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()
tr := &Transport{}
defer tr.CloseIdleConnections()
cl := &Client{Transport: tr}
res, err := cl.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 errorReader struct {
err error
}
func (e errorReader) Read(p []byte) (int, error) { return 0, e.err }
type closerFunc func() error
func (f closerFunc) Close() error { return f() }
// Issue 6981
func TestTransportClosesBodyOnError(t *testing.T) {
if runtime.GOOS == "plan9" {
t.Skip("skipping test; see http://golang.org/issue/7782")
}
defer afterTest(t)
readBody := make(chan error, 1)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
_, err := ioutil.ReadAll(r.Body)
readBody <- err
}))
defer ts.Close()
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), errorReader{fakeErr}),
closerFunc(func() error {
select {
case didClose <- true:
default:
}
return nil
}),
})
res, err := DefaultClient.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) {
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()
tr := &Transport{
DialTLS: func(netw, addr string) (net.Conn, error) {
mu.Lock()
didDial = true
mu.Unlock()
c, err := tls.Dial(netw, addr, &tls.Config{
InsecureSkipVerify: true,
})
if err != nil {
return nil, err
}
return c, c.Handshake()
},
}
defer tr.CloseIdleConnections()
client := &Client{Transport: tr}
res, err := client.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")
}
}
// Test for issue 8755
// Ensure that if a proxy returns an error, it is exposed by RoundTrip
func TestRoundTripReturnsProxyError(t *testing.T) {
badProxy := func(*http.Request) (*url.URL, error) {
return nil, errors.New("errorMessage")
}
tr := &Transport{Proxy: badProxy}
req, _ := http.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() {
t.Fatal("put failed")
}
if !tr.PutIdleTestConn() {
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() {
t.Fatal("put didn't fail")
}
wantIdle("after second put", 0)
tr.RequestIdleConnChForTesting() // should toggle the transport out of idle mode
if tr.IsIdleForTesting() {
t.Error("shouldn't be idle after RequestIdleConnChForTesting")
}
if !tr.PutIdleTestConn() {
t.Fatal("after re-activation")
}
wantIdle("after final put", 1)
}
// This tests that an 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()
req, _ := NewRequest("GET", ts.URL, nil)
req.Header.Set("Range", "bytes=7-11")
res, err := DefaultClient.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()
}
// Previously, we used to handle a logical race within RoundTrip by waiting for 100ms
// in the case of an error. Changing the order of the channel operations got rid of this
// race.
//
// In order to test that the channel op reordering works, we install a hook into the
// roundTrip function which gets called if we saw the connection go away and
// we subsequently received a response.
func TestTransportResponseCloseRace(t *testing.T) {
if testing.Short() {
t.Skip("skipping in short mode")
}
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {
}))
defer ts.Close()
sawRace := false
SetInstallConnClosedHook(func() {
sawRace = true
})
defer SetInstallConnClosedHook(nil)
tr := &Transport{
DisableKeepAlives: true,
}
req, err := NewRequest("GET", ts.URL, nil)
if err != nil {
t.Fatal(err)
}
// selects are not deterministic, so do this a bunch
// and see if we handle the logical race at least once.
for i := 0; i < 10000; i++ {
resp, err := tr.RoundTrip(req)
if err != nil {
t.Fatalf("unexpected error: %s", err)
continue
}
resp.Body.Close()
if sawRace {
break
}
}
if !sawRace {
t.Errorf("didn't see response/connection going away race")
}
}
// 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 := &Transport{}
defer tr.CloseIdleConnections()
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(ioutil.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()
}
func TestTransportDialCancelRace(t *testing.T) {
defer afterTest(t)
ts := httptest.NewServer(HandlerFunc(func(w ResponseWriter, r *Request) {}))
defer ts.Close()
tr := &Transport{}
defer tr.CloseIdleConnections()
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()
}
}
}
func wantBody(res *http.Response, err error, want string) error {
if err != nil {
return err
}
slurp, err := ioutil.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,
}