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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 (
"bytes"
"compress/gzip"
"crypto/rand"
"fmt"
. "http"
"http/httptest"
"io"
"io/ioutil"
"strconv"
"strings"
"testing"
"time"
"url"
)
// 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.Write([]byte(r.RemoteAddr))
})
// 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) {
ts := httptest.NewServer(hostPortHandler)
defer ts.Close()
for _, disableKeepAlive := range []bool{false, true} {
tr := &Transport{DisableKeepAlives: disableKeepAlive}
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) {
ts := httptest.NewServer(hostPortHandler)
defer ts.Close()
for _, connectionClose := range []bool{false, true} {
tr := &Transport{}
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)
}
body, err := ioutil.ReadAll(res.Body)
defer res.Body.Close()
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)
}
}
}
func TestTransportConnectionCloseOnRequest(t *testing.T) {
ts := httptest.NewServer(hostPortHandler)
defer ts.Close()
for _, connectionClose := range []bool{false, true} {
tr := &Transport{}
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)
}
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)
}
}
}
func TestTransportIdleCacheKeys(t *testing.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)
}
}
func TestTransportMaxPerHostIdleConns(t *testing.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 we write to resch, though.
donech := make(chan bool)
doReq := func() {
resp, err := c.Get(ts.URL)
if err != nil {
t.Error(err)
}
_, err = ioutil.ReadAll(resp.Body)
if err != nil {
t.Fatalf("ReadAll: %v", err)
}
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) {
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(1e9 / int64(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(25e6)
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")
}
}
// TestTransportHeadResponses verifies that we deal with Content-Lengths
// with no bodies properly
func TestTransportHeadResponses(t *testing.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)
}
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(0), res.ContentLength; e != g {
t.Errorf("loop %d: expected res.ContentLength of %v, got %v", i, e, g)
}
}
}
// TestTransportHeadChunkedResponse verifies that we ignore chunked transfer-encoding
// on responses to HEAD requests.
func TestTransportHeadChunkedResponse(t *testing.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) {
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 {
gzip, _ := gzip.NewReader(res.Body)
body, err = ioutil.ReadAll(gzip)
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) {
const testString = "The test string aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
const nRandBytes = 1024 * 1024
ts := httptest.NewServer(HandlerFunc(func(rw ResponseWriter, req *Request) {
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")
if req.Method == "HEAD" {
return
}
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) {
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) {
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)
}
}
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) {
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)
}
}
// 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,
}
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