--- /dev/null
+// 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.
+
+package proxy
+
+import (
+ "bytes"
+ "fmt"
+ "io"
+ "net"
+ "net/url"
+ "os"
+ "strconv"
+ "strings"
+ "sync"
+ "testing"
+)
+
+type proxyFromEnvTest struct {
+ allProxyEnv string
+ noProxyEnv string
+ wantTypeOf Dialer
+}
+
+func (t proxyFromEnvTest) String() string {
+ var buf bytes.Buffer
+ space := func() {
+ if buf.Len() > 0 {
+ buf.WriteByte(' ')
+ }
+ }
+ if t.allProxyEnv != "" {
+ fmt.Fprintf(&buf, "all_proxy=%q", t.allProxyEnv)
+ }
+ if t.noProxyEnv != "" {
+ space()
+ fmt.Fprintf(&buf, "no_proxy=%q", t.noProxyEnv)
+ }
+ return strings.TrimSpace(buf.String())
+}
+
+func TestFromEnvironment(t *testing.T) {
+ ResetProxyEnv()
+
+ type dummyDialer struct {
+ direct
+ }
+
+ RegisterDialerType("irc", func(_ *url.URL, _ Dialer) (Dialer, error) {
+ return dummyDialer{}, nil
+ })
+
+ proxyFromEnvTests := []proxyFromEnvTest{
+ {allProxyEnv: "127.0.0.1:8080", noProxyEnv: "localhost, 127.0.0.1", wantTypeOf: direct{}},
+ {allProxyEnv: "ftp://example.com:8000", noProxyEnv: "localhost, 127.0.0.1", wantTypeOf: direct{}},
+ {allProxyEnv: "socks5://example.com:8080", noProxyEnv: "localhost, 127.0.0.1", wantTypeOf: &PerHost{}},
+ {allProxyEnv: "irc://example.com:8000", wantTypeOf: dummyDialer{}},
+ {noProxyEnv: "localhost, 127.0.0.1", wantTypeOf: direct{}},
+ {wantTypeOf: direct{}},
+ }
+
+ for _, tt := range proxyFromEnvTests {
+ os.Setenv("ALL_PROXY", tt.allProxyEnv)
+ os.Setenv("NO_PROXY", tt.noProxyEnv)
+ ResetCachedEnvironment()
+
+ d := FromEnvironment()
+ if got, want := fmt.Sprintf("%T", d), fmt.Sprintf("%T", tt.wantTypeOf); got != want {
+ t.Errorf("%v: got type = %T, want %T", tt, d, tt.wantTypeOf)
+ }
+ }
+}
+
+func TestFromURL(t *testing.T) {
+ endSystem, err := net.Listen("tcp", "127.0.0.1:0")
+ if err != nil {
+ t.Fatalf("net.Listen failed: %v", err)
+ }
+ defer endSystem.Close()
+ gateway, err := net.Listen("tcp", "127.0.0.1:0")
+ if err != nil {
+ t.Fatalf("net.Listen failed: %v", err)
+ }
+ defer gateway.Close()
+
+ var wg sync.WaitGroup
+ wg.Add(1)
+ go socks5Gateway(t, gateway, endSystem, socks5Domain, &wg)
+
+ url, err := url.Parse("socks5://user:password@" + gateway.Addr().String())
+ if err != nil {
+ t.Fatalf("url.Parse failed: %v", err)
+ }
+ proxy, err := FromURL(url, Direct)
+ if err != nil {
+ t.Fatalf("FromURL failed: %v", err)
+ }
+ _, port, err := net.SplitHostPort(endSystem.Addr().String())
+ if err != nil {
+ t.Fatalf("net.SplitHostPort failed: %v", err)
+ }
+ if c, err := proxy.Dial("tcp", "localhost:"+port); err != nil {
+ t.Fatalf("FromURL.Dial failed: %v", err)
+ } else {
+ c.Close()
+ }
+
+ wg.Wait()
+}
+
+func TestSOCKS5(t *testing.T) {
+ endSystem, err := net.Listen("tcp", "127.0.0.1:0")
+ if err != nil {
+ t.Fatalf("net.Listen failed: %v", err)
+ }
+ defer endSystem.Close()
+ gateway, err := net.Listen("tcp", "127.0.0.1:0")
+ if err != nil {
+ t.Fatalf("net.Listen failed: %v", err)
+ }
+ defer gateway.Close()
+
+ var wg sync.WaitGroup
+ wg.Add(1)
+ go socks5Gateway(t, gateway, endSystem, socks5IP4, &wg)
+
+ proxy, err := SOCKS5("tcp", gateway.Addr().String(), nil, Direct)
+ if err != nil {
+ t.Fatalf("SOCKS5 failed: %v", err)
+ }
+ if c, err := proxy.Dial("tcp", endSystem.Addr().String()); err != nil {
+ t.Fatalf("SOCKS5.Dial failed: %v", err)
+ } else {
+ c.Close()
+ }
+
+ wg.Wait()
+}
+
+func socks5Gateway(t *testing.T, gateway, endSystem net.Listener, typ byte, wg *sync.WaitGroup) {
+ defer wg.Done()
+
+ c, err := gateway.Accept()
+ if err != nil {
+ t.Errorf("net.Listener.Accept failed: %v", err)
+ return
+ }
+ defer c.Close()
+
+ b := make([]byte, 32)
+ var n int
+ if typ == socks5Domain {
+ n = 4
+ } else {
+ n = 3
+ }
+ if _, err := io.ReadFull(c, b[:n]); err != nil {
+ t.Errorf("io.ReadFull failed: %v", err)
+ return
+ }
+ if _, err := c.Write([]byte{socks5Version, socks5AuthNone}); err != nil {
+ t.Errorf("net.Conn.Write failed: %v", err)
+ return
+ }
+ if typ == socks5Domain {
+ n = 16
+ } else {
+ n = 10
+ }
+ if _, err := io.ReadFull(c, b[:n]); err != nil {
+ t.Errorf("io.ReadFull failed: %v", err)
+ return
+ }
+ if b[0] != socks5Version || b[1] != socks5Connect || b[2] != 0x00 || b[3] != typ {
+ t.Errorf("got an unexpected packet: %#02x %#02x %#02x %#02x", b[0], b[1], b[2], b[3])
+ return
+ }
+ if typ == socks5Domain {
+ copy(b[:5], []byte{socks5Version, 0x00, 0x00, socks5Domain, 9})
+ b = append(b, []byte("localhost")...)
+ } else {
+ copy(b[:4], []byte{socks5Version, 0x00, 0x00, socks5IP4})
+ }
+ host, port, err := net.SplitHostPort(endSystem.Addr().String())
+ if err != nil {
+ t.Errorf("net.SplitHostPort failed: %v", err)
+ return
+ }
+ b = append(b, []byte(net.ParseIP(host).To4())...)
+ p, err := strconv.Atoi(port)
+ if err != nil {
+ t.Errorf("strconv.Atoi failed: %v", err)
+ return
+ }
+ b = append(b, []byte{byte(p >> 8), byte(p)}...)
+ if _, err := c.Write(b); err != nil {
+ t.Errorf("net.Conn.Write failed: %v", err)
+ return
+ }
+}
+
+func ResetProxyEnv() {
+ for _, env := range []*envOnce{allProxyEnv, noProxyEnv} {
+ for _, v := range env.names {
+ os.Setenv(v, "")
+ }
+ }
+ ResetCachedEnvironment()
+}
+
+func ResetCachedEnvironment() {
+ allProxyEnv.reset()
+ noProxyEnv.reset()
+}
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