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// Copyright 2022 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.
package http_test
import (
"errors"
"fmt"
"io"
. "net/http"
"os"
"sync"
"testing"
"time"
)
func TestResponseControllerFlush(t *testing.T) { run(t, testResponseControllerFlush) }
func testResponseControllerFlush(t *testing.T, mode testMode) {
continuec := make(chan struct{})
cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {
ctl := NewResponseController(w)
w.Write([]byte("one"))
if err := ctl.Flush(); err != nil {
t.Errorf("ctl.Flush() = %v, want nil", err)
return
}
<-continuec
w.Write([]byte("two"))
}))
res, err := cst.c.Get(cst.ts.URL)
if err != nil {
t.Fatalf("unexpected connection error: %v", err)
}
defer res.Body.Close()
buf := make([]byte, 16)
n, err := res.Body.Read(buf)
close(continuec)
if err != nil || string(buf[:n]) != "one" {
t.Fatalf("Body.Read = %q, %v, want %q, nil", string(buf[:n]), err, "one")
}
got, err := io.ReadAll(res.Body)
if err != nil || string(got) != "two" {
t.Fatalf("Body.Read = %q, %v, want %q, nil", string(got), err, "two")
}
}
func TestResponseControllerHijack(t *testing.T) { run(t, testResponseControllerHijack) }
func testResponseControllerHijack(t *testing.T, mode testMode) {
const header = "X-Header"
const value = "set"
cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {
ctl := NewResponseController(w)
c, _, err := ctl.Hijack()
if mode == http2Mode {
if err == nil {
t.Errorf("ctl.Hijack = nil, want error")
}
w.Header().Set(header, value)
return
}
if err != nil {
t.Errorf("ctl.Hijack = _, _, %v, want _, _, nil", err)
return
}
fmt.Fprintf(c, "HTTP/1.0 200 OK\r\n%v: %v\r\nContent-Length: 0\r\n\r\n", header, value)
}))
res, err := cst.c.Get(cst.ts.URL)
if err != nil {
t.Fatal(err)
}
if got, want := res.Header.Get(header), value; got != want {
t.Errorf("response header %q = %q, want %q", header, got, want)
}
}
func TestResponseControllerSetPastWriteDeadline(t *testing.T) {
run(t, testResponseControllerSetPastWriteDeadline)
}
func testResponseControllerSetPastWriteDeadline(t *testing.T, mode testMode) {
cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {
ctl := NewResponseController(w)
w.Write([]byte("one"))
if err := ctl.Flush(); err != nil {
t.Errorf("before setting deadline: ctl.Flush() = %v, want nil", err)
}
if err := ctl.SetWriteDeadline(time.Now().Add(-10 * time.Second)); err != nil {
t.Errorf("ctl.SetWriteDeadline() = %v, want nil", err)
}
w.Write([]byte("two"))
if err := ctl.Flush(); err == nil {
t.Errorf("after setting deadline: ctl.Flush() = nil, want non-nil")
}
// Connection errors are sticky, so resetting the deadline does not permit
// making more progress. We might want to change this in the future, but verify
// the current behavior for now. If we do change this, we'll want to make sure
// to do so only for writing the response body, not headers.
if err := ctl.SetWriteDeadline(time.Now().Add(1 * time.Hour)); err != nil {
t.Errorf("ctl.SetWriteDeadline() = %v, want nil", err)
}
w.Write([]byte("three"))
if err := ctl.Flush(); err == nil {
t.Errorf("after resetting deadline: ctl.Flush() = nil, want non-nil")
}
}))
res, err := cst.c.Get(cst.ts.URL)
if err != nil {
t.Fatalf("unexpected connection error: %v", err)
}
defer res.Body.Close()
b, _ := io.ReadAll(res.Body)
if string(b) != "one" {
t.Errorf("unexpected body: %q", string(b))
}
}
func TestResponseControllerSetFutureWriteDeadline(t *testing.T) {
run(t, testResponseControllerSetFutureWriteDeadline)
}
func testResponseControllerSetFutureWriteDeadline(t *testing.T, mode testMode) {
errc := make(chan error, 1)
startwritec := make(chan struct{})
cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {
ctl := NewResponseController(w)
w.WriteHeader(200)
if err := ctl.Flush(); err != nil {
t.Errorf("ctl.Flush() = %v, want nil", err)
}
<-startwritec // don't set the deadline until the client reads response headers
if err := ctl.SetWriteDeadline(time.Now().Add(1 * time.Millisecond)); err != nil {
t.Errorf("ctl.SetWriteDeadline() = %v, want nil", err)
}
_, err := io.Copy(w, neverEnding('a'))
errc <- err
}))
res, err := cst.c.Get(cst.ts.URL)
close(startwritec)
if err != nil {
t.Fatalf("unexpected connection error: %v", err)
}
defer res.Body.Close()
_, err = io.Copy(io.Discard, res.Body)
if err == nil {
t.Errorf("client reading from truncated request body: got nil error, want non-nil")
}
err = <-errc // io.Copy error
if !errors.Is(err, os.ErrDeadlineExceeded) {
t.Errorf("server timed out writing request body: got err %v; want os.ErrDeadlineExceeded", err)
}
}
func TestResponseControllerSetPastReadDeadline(t *testing.T) {
run(t, testResponseControllerSetPastReadDeadline)
}
func testResponseControllerSetPastReadDeadline(t *testing.T, mode testMode) {
readc := make(chan struct{})
donec := make(chan struct{})
cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {
defer close(donec)
ctl := NewResponseController(w)
b := make([]byte, 3)
n, err := io.ReadFull(r.Body, b)
b = b[:n]
if err != nil || string(b) != "one" {
t.Errorf("before setting read deadline: Read = %v, %q, want nil, %q", err, string(b), "one")
return
}
if err := ctl.SetReadDeadline(time.Now()); err != nil {
t.Errorf("ctl.SetReadDeadline() = %v, want nil", err)
return
}
b, err = io.ReadAll(r.Body)
if err == nil || string(b) != "" {
t.Errorf("after setting read deadline: Read = %q, nil, want error", string(b))
}
close(readc)
// Connection errors are sticky, so resetting the deadline does not permit
// making more progress. We might want to change this in the future, but verify
// the current behavior for now.
if err := ctl.SetReadDeadline(time.Time{}); err != nil {
t.Errorf("ctl.SetReadDeadline() = %v, want nil", err)
return
}
b, err = io.ReadAll(r.Body)
if err == nil {
t.Errorf("after resetting read deadline: Read = %q, nil, want error", string(b))
}
}))
pr, pw := io.Pipe()
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()
defer pw.Close()
pw.Write([]byte("one"))
select {
case <-readc:
case <-donec:
select {
case <-readc:
default:
t.Errorf("server handler unexpectedly exited without closing readc")
return
}
}
pw.Write([]byte("two"))
}()
defer wg.Wait()
res, err := cst.c.Post(cst.ts.URL, "text/foo", pr)
if err == nil {
defer res.Body.Close()
}
}
func TestResponseControllerSetFutureReadDeadline(t *testing.T) {
run(t, testResponseControllerSetFutureReadDeadline)
}
func testResponseControllerSetFutureReadDeadline(t *testing.T, mode testMode) {
respBody := "response body"
cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, req *Request) {
ctl := NewResponseController(w)
if err := ctl.SetReadDeadline(time.Now().Add(1 * time.Millisecond)); err != nil {
t.Errorf("ctl.SetReadDeadline() = %v, want nil", err)
}
_, err := io.Copy(io.Discard, req.Body)
if !errors.Is(err, os.ErrDeadlineExceeded) {
t.Errorf("server timed out reading request body: got err %v; want os.ErrDeadlineExceeded", err)
}
w.Write([]byte(respBody))
}))
pr, pw := io.Pipe()
res, err := cst.c.Post(cst.ts.URL, "text/apocryphal", pr)
if err != nil {
t.Fatal(err)
}
defer res.Body.Close()
got, err := io.ReadAll(res.Body)
if string(got) != respBody || err != nil {
t.Errorf("client read response body: %q, %v; want %q, nil", string(got), err, respBody)
}
pw.Close()
}
type wrapWriter struct {
ResponseWriter
}
func (w wrapWriter) Unwrap() ResponseWriter {
return w.ResponseWriter
}
func TestWrappedResponseController(t *testing.T) { run(t, testWrappedResponseController) }
func testWrappedResponseController(t *testing.T, mode testMode) {
cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {
w = wrapWriter{w}
ctl := NewResponseController(w)
if err := ctl.Flush(); err != nil {
t.Errorf("ctl.Flush() = %v, want nil", err)
}
if err := ctl.SetReadDeadline(time.Time{}); err != nil {
t.Errorf("ctl.SetReadDeadline() = %v, want nil", err)
}
if err := ctl.SetWriteDeadline(time.Time{}); err != nil {
t.Errorf("ctl.SetWriteDeadline() = %v, want nil", err)
}
}))
res, err := cst.c.Get(cst.ts.URL)
if err != nil {
t.Fatalf("unexpected connection error: %v", err)
}
io.Copy(io.Discard, res.Body)
defer res.Body.Close()
}
func TestResponseControllerEnableFullDuplex(t *testing.T) {
run(t, testResponseControllerEnableFullDuplex)
}
func testResponseControllerEnableFullDuplex(t *testing.T, mode testMode) {
cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, req *Request) {
ctl := NewResponseController(w)
if err := ctl.EnableFullDuplex(); err != nil {
// TODO: Drop test for HTTP/2 when x/net is updated to support
// EnableFullDuplex. Since HTTP/2 supports full duplex by default,
// the rest of the test is fine; it's just the EnableFullDuplex call
// that fails.
if mode != http2Mode {
t.Errorf("ctl.EnableFullDuplex() = %v, want nil", err)
}
}
w.WriteHeader(200)
ctl.Flush()
for {
var buf [1]byte
n, err := req.Body.Read(buf[:])
if n != 1 || err != nil {
break
}
w.Write(buf[:])
ctl.Flush()
}
}))
pr, pw := io.Pipe()
res, err := cst.c.Post(cst.ts.URL, "text/apocryphal", pr)
if err != nil {
t.Fatal(err)
}
defer res.Body.Close()
for i := byte(0); i < 10; i++ {
if _, err := pw.Write([]byte{i}); err != nil {
t.Fatalf("Write: %v", err)
}
var buf [1]byte
if n, err := res.Body.Read(buf[:]); n != 1 || err != nil {
t.Fatalf("Read: %v, %v", n, err)
}
if buf[0] != i {
t.Fatalf("read byte %v, want %v", buf[0], i)
}
}
pw.Close()
}
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