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Current Path: /opt/golang/1.22.0/src/net

📁 ..
📄 addrselect.go(9.69 KB)
📄 addrselect_test.go(8.5 KB)
📄 cgo_aix.go(582 B)
📄 cgo_android.go(272 B)
📄 cgo_bsd.go(343 B)
📄 cgo_darwin.go(298 B)
📄 cgo_linux.go(642 B)
📄 cgo_netbsd.go(276 B)
📄 cgo_openbsd.go(276 B)
📄 cgo_resnew.go(580 B)
📄 cgo_resold.go(579 B)
📄 cgo_socknew.go(753 B)
📄 cgo_sockold.go(842 B)
📄 cgo_solaris.go(343 B)
📄 cgo_stub.go(1.33 KB)
📄 cgo_unix.go(11.35 KB)
📄 cgo_unix_cgo.go(2.24 KB)
📄 cgo_unix_cgo_darwin.go(461 B)
📄 cgo_unix_cgo_res.go(911 B)
📄 cgo_unix_cgo_resn.go(998 B)
📄 cgo_unix_syscall.go(2.99 KB)
📄 cgo_unix_test.go(1.44 KB)
📄 conf.go(15.63 KB)
📄 conf_test.go(12.28 KB)
📄 conn_test.go(1.82 KB)
📄 dial.go(25.68 KB)
📄 dial_test.go(30.14 KB)
📄 dial_unix_test.go(2.77 KB)
📄 dnsclient.go(5.65 KB)
📄 dnsclient_test.go(1.51 KB)
📄 dnsclient_unix.go(24.26 KB)
📄 dnsclient_unix_test.go(69.13 KB)
📄 dnsconfig.go(1.73 KB)
📄 dnsconfig_unix.go(4.16 KB)
📄 dnsconfig_unix_test.go(7.07 KB)
📄 dnsconfig_windows.go(1.6 KB)
📄 dnsname_test.go(1.96 KB)
📄 error_plan9.go(224 B)
📄 error_plan9_test.go(437 B)
📄 error_posix.go(543 B)
📄 error_posix_test.go(981 B)
📄 error_test.go(20.32 KB)
📄 error_unix.go(382 B)
📄 error_unix_test.go(723 B)
📄 error_windows.go(355 B)
📄 error_windows_test.go(757 B)
📄 example_test.go(8.45 KB)
📄 external_test.go(4.05 KB)
📄 fd_fake.go(3.79 KB)
📄 fd_js.go(627 B)
📄 fd_plan9.go(3.56 KB)
📄 fd_posix.go(4.29 KB)
📄 fd_unix.go(5.43 KB)
📄 fd_wasip1.go(496 B)
📄 fd_windows.go(6.14 KB)
📄 file.go(1.69 KB)
📄 file_plan9.go(2.72 KB)
📄 file_stub.go(481 B)
📄 file_test.go(6.43 KB)
📄 file_unix.go(2.5 KB)
📄 file_unix_test.go(2.07 KB)
📄 file_wasip1.go(2.2 KB)
📄 file_wasip1_test.go(3.76 KB)
📄 file_windows.go(521 B)
📄 hook.go(894 B)
📄 hook_plan9.go(211 B)
📄 hook_unix.go(658 B)
📄 hook_windows.go(720 B)
📄 hosts.go(3.48 KB)
📄 hosts_test.go(5.6 KB)
📁 http
📄 interface.go(7.26 KB)
📄 interface_aix.go(4.46 KB)
📄 interface_bsd.go(2.82 KB)
📄 interface_bsd_test.go(1.44 KB)
📄 interface_bsdvar.go(718 B)
📄 interface_darwin.go(1.29 KB)
📄 interface_freebsd.go(1.29 KB)
📄 interface_linux.go(6.96 KB)
📄 interface_linux_test.go(3.65 KB)
📄 interface_plan9.go(4.71 KB)
📄 interface_solaris.go(2.13 KB)
📄 interface_stub.go(814 B)
📄 interface_test.go(9.76 KB)
📄 interface_unix_test.go(4.85 KB)
📄 interface_windows.go(5.43 KB)
📁 internal
📄 ip.go(13.88 KB)
📄 ip_test.go(25.6 KB)
📄 iprawsock.go(7.11 KB)
📄 iprawsock_plan9.go(874 B)
📄 iprawsock_posix.go(3.89 KB)
📄 iprawsock_test.go(5.98 KB)
📄 ipsock.go(9.05 KB)
📄 ipsock_plan9.go(7.48 KB)
📄 ipsock_plan9_test.go(645 B)
📄 ipsock_posix.go(7.86 KB)
📄 ipsock_test.go(6.81 KB)
📄 listen_test.go(20.5 KB)
📄 lookup.go(29.04 KB)
📄 lookup_plan9.go(9.94 KB)
📄 lookup_test.go(40.62 KB)
📄 lookup_unix.go(3.35 KB)
📄 lookup_windows.go(13.8 KB)
📄 lookup_windows_test.go(8.93 KB)
📄 mac.go(1.88 KB)
📄 mac_test.go(3.26 KB)
📁 mail
📄 main_cloexec_test.go(693 B)
📄 main_conf_test.go(1.39 KB)
📄 main_noconf_test.go(467 B)
📄 main_plan9_test.go(392 B)
📄 main_posix_test.go(1.37 KB)
📄 main_test.go(7.53 KB)
📄 main_unix_test.go(1.19 KB)
📄 main_wasm_test.go(284 B)
📄 main_windows_test.go(1 KB)
📄 mockserver_test.go(10.77 KB)
📄 mptcpsock_linux.go(3.96 KB)
📄 mptcpsock_linux_test.go(4.06 KB)
📄 mptcpsock_stub.go(542 B)
📄 net.go(24.56 KB)
📄 net_fake.go(26.36 KB)
📄 net_fake_test.go(2.79 KB)
📄 net_test.go(14 KB)
📄 net_windows_test.go(16.28 KB)
📄 netcgo_off.go(222 B)
📄 netcgo_on.go(220 B)
📄 netgo_netcgo.go(453 B)
📄 netgo_off.go(220 B)
📄 netgo_on.go(218 B)
📁 netip
📄 nss.go(5.48 KB)
📄 nss_test.go(3.4 KB)
📄 packetconn_test.go(3.02 KB)
📄 parse.go(6.04 KB)
📄 parse_test.go(1.55 KB)
📄 pipe.go(5.43 KB)
📄 pipe_test.go(1.2 KB)
📄 platform_test.go(4.33 KB)
📄 port.go(1.46 KB)
📄 port_test.go(1.34 KB)
📄 port_unix.go(1.24 KB)
📄 protoconn_test.go(7.44 KB)
📄 rawconn.go(2.7 KB)
📄 rawconn_stub_test.go(631 B)
📄 rawconn_test.go(4.33 KB)
📄 rawconn_unix_test.go(2.96 KB)
📄 rawconn_windows_test.go(3.12 KB)
📄 resolverdialfunc_test.go(8.25 KB)
📄 rlimit_js.go(346 B)
📄 rlimit_unix.go(1.1 KB)
📁 rpc
📄 sendfile_linux.go(1.12 KB)
📄 sendfile_linux_test.go(1.93 KB)
📄 sendfile_stub.go(344 B)
📄 sendfile_test.go(8.25 KB)
📄 sendfile_unix_alt.go(2.04 KB)
📄 sendfile_windows.go(1.02 KB)
📄 server_test.go(11.67 KB)
📁 smtp
📄 sock_bsd.go(918 B)
📄 sock_cloexec.go(1.38 KB)
📄 sock_linux.go(993 B)
📄 sock_linux_test.go(575 B)
📄 sock_plan9.go(262 B)
📄 sock_posix.go(6.29 KB)
📄 sock_stub.go(390 B)
📄 sock_windows.go(802 B)
📄 sockaddr_posix.go(1.45 KB)
📄 sockopt_aix.go(1.43 KB)
📄 sockopt_bsd.go(2.21 KB)
📄 sockopt_fake.go(955 B)
📄 sockopt_linux.go(1.25 KB)
📄 sockopt_plan9.go(406 B)
📄 sockopt_posix.go(2.13 KB)
📄 sockopt_solaris.go(1.25 KB)
📄 sockopt_windows.go(1.51 KB)
📄 sockoptip_bsdvar.go(867 B)
📄 sockoptip_linux.go(735 B)
📄 sockoptip_posix.go(1.38 KB)
📄 sockoptip_stub.go(769 B)
📄 sockoptip_windows.go(786 B)
📄 splice_linux.go(1.69 KB)
📄 splice_stub.go(376 B)
📄 splice_test.go(13.48 KB)
📄 sys_cloexec.go(962 B)
📄 tcpsock.go(11.75 KB)
📄 tcpsock_plan9.go(2.18 KB)
📄 tcpsock_posix.go(6.16 KB)
📄 tcpsock_test.go(17.68 KB)
📄 tcpsock_unix_test.go(2.34 KB)
📄 tcpsockopt_darwin.go(770 B)
📄 tcpsockopt_dragonfly.go(698 B)
📄 tcpsockopt_openbsd.go(365 B)
📄 tcpsockopt_plan9.go(525 B)
📄 tcpsockopt_posix.go(442 B)
📄 tcpsockopt_solaris.go(1.15 KB)
📄 tcpsockopt_stub.go(399 B)
📄 tcpsockopt_unix.go(722 B)
📄 tcpsockopt_windows.go(741 B)
📁 testdata
📁 textproto
📄 timeout_test.go(29.11 KB)
📄 udpsock.go(11.83 KB)
📄 udpsock_plan9.go(4.64 KB)
📄 udpsock_plan9_test.go(1.31 KB)
📄 udpsock_posix.go(7.53 KB)
📄 udpsock_test.go(17.24 KB)
📄 unixsock.go(10.12 KB)
📄 unixsock_linux_test.go(2.29 KB)
📄 unixsock_plan9.go(1.24 KB)
📄 unixsock_posix.go(6.64 KB)
📄 unixsock_readmsg_cloexec.go(654 B)
📄 unixsock_readmsg_cmsg_cloexec.go(332 B)
📄 unixsock_readmsg_other.go(275 B)
📄 unixsock_readmsg_test.go(2.51 KB)
📄 unixsock_test.go(10.64 KB)
📄 unixsock_windows_test.go(2.03 KB)
📁 url
📄 write_unix_test.go(1.61 KB)
📄 writev_test.go(5.03 KB)
📄 writev_unix.go(666 B)

Editing: sendfile_test.go

// Copyright 2016 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 net

import (
	"bytes"
	"context"
	"crypto/sha256"
	"encoding/hex"
	"errors"
	"fmt"
	"io"
	"os"
	"runtime"
	"sync"
	"testing"
	"time"
)

const (
	newton       = "../testdata/Isaac.Newton-Opticks.txt"
	newtonLen    = 567198
	newtonSHA256 = "d4a9ac22462b35e7821a4f2706c211093da678620a8f9997989ee7cf8d507bbd"
)

func TestSendfile(t *testing.T) {
	ln := newLocalListener(t, "tcp")
	defer ln.Close()

errc := make(chan error, 1)
	go func(ln Listener) {
		// Wait for a connection.
		conn, err := ln.Accept()
		if err != nil {
			errc <- err
			close(errc)
			return
		}

go func() {
			defer close(errc)
			defer conn.Close()

f, err := os.Open(newton)
			if err != nil {
				errc <- err
				return
			}
			defer f.Close()

// Return file data using io.Copy, which should use
			// sendFile if available.
			sbytes, err := io.Copy(conn, f)
			if err != nil {
				errc <- err
				return
			}

if sbytes != newtonLen {
				errc <- fmt.Errorf("sent %d bytes; expected %d", sbytes, newtonLen)
				return
			}
		}()
	}(ln)

// Connect to listener to retrieve file and verify digest matches
	// expected.
	c, err := Dial("tcp", ln.Addr().String())
	if err != nil {
		t.Fatal(err)
	}
	defer c.Close()

h := sha256.New()
	rbytes, err := io.Copy(h, c)
	if err != nil {
		t.Error(err)
	}

if rbytes != newtonLen {
		t.Errorf("received %d bytes; expected %d", rbytes, newtonLen)
	}

if res := hex.EncodeToString(h.Sum(nil)); res != newtonSHA256 {
		t.Error("retrieved data hash did not match")
	}

for err := range errc {
		t.Error(err)
	}
}

func TestSendfileParts(t *testing.T) {
	ln := newLocalListener(t, "tcp")
	defer ln.Close()

errc := make(chan error, 1)
	go func(ln Listener) {
		// Wait for a connection.
		conn, err := ln.Accept()
		if err != nil {
			errc <- err
			close(errc)
			return
		}

go func() {
			defer close(errc)
			defer conn.Close()

f, err := os.Open(newton)
			if err != nil {
				errc <- err
				return
			}
			defer f.Close()

for i := 0; i < 3; i++ {
				// Return file data using io.CopyN, which should use
				// sendFile if available.
				_, err = io.CopyN(conn, f, 3)
				if err != nil {
					errc <- err
					return
				}
			}
		}()
	}(ln)

c, err := Dial("tcp", ln.Addr().String())
	if err != nil {
		t.Fatal(err)
	}
	defer c.Close()

buf := new(bytes.Buffer)
	buf.ReadFrom(c)

if want, have := "Produced ", buf.String(); have != want {
		t.Errorf("unexpected server reply %q, want %q", have, want)
	}

for err := range errc {
		t.Error(err)
	}
}

func TestSendfileSeeked(t *testing.T) {
	ln := newLocalListener(t, "tcp")
	defer ln.Close()

const seekTo = 65 << 10
	const sendSize = 10 << 10

errc := make(chan error, 1)
	go func(ln Listener) {
		// Wait for a connection.
		conn, err := ln.Accept()
		if err != nil {
			errc <- err
			close(errc)
			return
		}

go func() {
			defer close(errc)
			defer conn.Close()

f, err := os.Open(newton)
			if err != nil {
				errc <- err
				return
			}
			defer f.Close()
			if _, err := f.Seek(seekTo, io.SeekStart); err != nil {
				errc <- err
				return
			}

_, err = io.CopyN(conn, f, sendSize)
			if err != nil {
				errc <- err
				return
			}
		}()
	}(ln)

c, err := Dial("tcp", ln.Addr().String())
	if err != nil {
		t.Fatal(err)
	}
	defer c.Close()

buf := new(bytes.Buffer)
	buf.ReadFrom(c)

if buf.Len() != sendSize {
		t.Errorf("Got %d bytes; want %d", buf.Len(), sendSize)
	}

for err := range errc {
		t.Error(err)
	}
}

// Test that sendfile doesn't put a pipe into blocking mode.
func TestSendfilePipe(t *testing.T) {
	switch runtime.GOOS {
	case "plan9", "windows", "js", "wasip1":
		// These systems don't support deadlines on pipes.
		t.Skipf("skipping on %s", runtime.GOOS)
	}

t.Parallel()

ln := newLocalListener(t, "tcp")
	defer ln.Close()

r, w, err := os.Pipe()
	if err != nil {
		t.Fatal(err)
	}
	defer w.Close()
	defer r.Close()

copied := make(chan bool)

var wg sync.WaitGroup
	wg.Add(1)
	go func() {
		// Accept a connection and copy 1 byte from the read end of
		// the pipe to the connection. This will call into sendfile.
		defer wg.Done()
		conn, err := ln.Accept()
		if err != nil {
			t.Error(err)
			return
		}
		defer conn.Close()
		_, err = io.CopyN(conn, r, 1)
		if err != nil {
			t.Error(err)
			return
		}
		// Signal the main goroutine that we've copied the byte.
		close(copied)
	}()

wg.Add(1)
	go func() {
		// Write 1 byte to the write end of the pipe.
		defer wg.Done()
		_, err := w.Write([]byte{'a'})
		if err != nil {
			t.Error(err)
		}
	}()

wg.Add(1)
	go func() {
		// Connect to the server started two goroutines up and
		// discard any data that it writes.
		defer wg.Done()
		conn, err := Dial("tcp", ln.Addr().String())
		if err != nil {
			t.Error(err)
			return
		}
		defer conn.Close()
		io.Copy(io.Discard, conn)
	}()

// Wait for the byte to be copied, meaning that sendfile has
	// been called on the pipe.
	<-copied

// Set a very short deadline on the read end of the pipe.
	if err := r.SetDeadline(time.Now().Add(time.Microsecond)); err != nil {
		t.Fatal(err)
	}

wg.Add(1)
	go func() {
		// Wait for much longer than the deadline and write a byte
		// to the pipe.
		defer wg.Done()
		time.Sleep(50 * time.Millisecond)
		w.Write([]byte{'b'})
	}()

// If this read does not time out, the pipe was incorrectly
	// put into blocking mode.
	_, err = r.Read(make([]byte, 1))
	if err == nil {
		t.Error("Read did not time out")
	} else if !os.IsTimeout(err) {
		t.Errorf("got error %v, expected a time out", err)
	}

wg.Wait()
}

// Issue 43822: tests that returns EOF when conn write timeout.
func TestSendfileOnWriteTimeoutExceeded(t *testing.T) {
	ln := newLocalListener(t, "tcp")
	defer ln.Close()

errc := make(chan error, 1)
	go func(ln Listener) (retErr error) {
		defer func() {
			errc <- retErr
			close(errc)
		}()

conn, err := ln.Accept()
		if err != nil {
			return err
		}
		defer conn.Close()

// Set the write deadline in the past(1h ago). It makes
		// sure that it is always write timeout.
		if err := conn.SetWriteDeadline(time.Now().Add(-1 * time.Hour)); err != nil {
			return err
		}

f, err := os.Open(newton)
		if err != nil {
			return err
		}
		defer f.Close()

_, err = io.Copy(conn, f)
		if errors.Is(err, os.ErrDeadlineExceeded) {
			return nil
		}

if err == nil {
			err = fmt.Errorf("expected ErrDeadlineExceeded, but got nil")
		}
		return err
	}(ln)

conn, err := Dial("tcp", ln.Addr().String())
	if err != nil {
		t.Fatal(err)
	}
	defer conn.Close()

n, err := io.Copy(io.Discard, conn)
	if err != nil {
		t.Fatalf("expected nil error, but got %v", err)
	}
	if n != 0 {
		t.Fatalf("expected receive zero, but got %d byte(s)", n)
	}

if err := <-errc; err != nil {
		t.Fatal(err)
	}
}

func BenchmarkSendfileZeroBytes(b *testing.B) {
	var (
		wg          sync.WaitGroup
		ctx, cancel = context.WithCancel(context.Background())
	)

defer wg.Wait()

ln := newLocalListener(b, "tcp")
	defer ln.Close()

tempFile, err := os.CreateTemp(b.TempDir(), "test.txt")
	if err != nil {
		b.Fatalf("failed to create temp file: %v", err)
	}
	defer tempFile.Close()

fileName := tempFile.Name()

dataSize := b.N
	wg.Add(1)
	go func(f *os.File) {
		defer wg.Done()

for i := 0; i < dataSize; i++ {
			if _, err := f.Write([]byte{1}); err != nil {
				b.Errorf("failed to write: %v", err)
				return
			}
			if i%1000 == 0 {
				f.Sync()
			}
		}
	}(tempFile)

b.ResetTimer()
	b.ReportAllocs()

wg.Add(1)
	go func(ln Listener, fileName string) {
		defer wg.Done()

conn, err := ln.Accept()
		if err != nil {
			b.Errorf("failed to accept: %v", err)
			return
		}
		defer conn.Close()

f, err := os.OpenFile(fileName, os.O_RDONLY, 0660)
		if err != nil {
			b.Errorf("failed to open file: %v", err)
			return
		}
		defer f.Close()

for {
			if ctx.Err() != nil {
				return
			}

if _, err := io.Copy(conn, f); err != nil {
				b.Errorf("failed to copy: %v", err)
				return
			}
		}
	}(ln, fileName)

conn, err := Dial("tcp", ln.Addr().String())
	if err != nil {
		b.Fatalf("failed to dial: %v", err)
	}
	defer conn.Close()

n, err := io.CopyN(io.Discard, conn, int64(dataSize))
	if err != nil {
		b.Fatalf("failed to copy: %v", err)
	}
	if n != int64(dataSize) {
		b.Fatalf("expected %d copied bytes, but got %d", dataSize, n)
	}

cancel()
}

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Editing: sendfile_test.go

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