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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.
package proxy
import (
"bytes"
"context"
"errors"
"fmt"
"net"
"net/url"
"os"
"strings"
"testing"
"golang.org/x/net/internal/socks"
"golang.org/x/net/internal/sockstest"
)
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: "socks5h://example.com", wantTypeOf: &socks.Dialer{}},
{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) {
ss, err := sockstest.NewServer(sockstest.NoAuthRequired, sockstest.NoProxyRequired)
if err != nil {
t.Fatal(err)
}
defer ss.Close()
url, err := url.Parse("socks5://user:password@" + ss.Addr().String())
if err != nil {
t.Fatal(err)
}
proxy, err := FromURL(url, nil)
if err != nil {
t.Fatal(err)
}
c, err := proxy.Dial("tcp", "fqdn.doesnotexist:5963")
if err != nil {
t.Fatal(err)
}
c.Close()
}
func TestSOCKS5(t *testing.T) {
ss, err := sockstest.NewServer(sockstest.NoAuthRequired, sockstest.NoProxyRequired)
if err != nil {
t.Fatal(err)
}
defer ss.Close()
proxy, err := SOCKS5("tcp", ss.Addr().String(), nil, nil)
if err != nil {
t.Fatal(err)
}
c, err := proxy.Dial("tcp", ss.TargetAddr().String())
if err != nil {
t.Fatal(err)
}
c.Close()
}
type funcFailDialer func(context.Context) error
func (f funcFailDialer) Dial(net, addr string) (net.Conn, error) {
panic("shouldn't see a call to Dial")
}
func (f funcFailDialer) DialContext(ctx context.Context, net, addr string) (net.Conn, error) {
return nil, f(ctx)
}
// Check that FromEnvironmentUsing uses our dialer.
func TestFromEnvironmentUsing(t *testing.T) {
ResetProxyEnv()
errFoo := errors.New("some error to check our dialer was used)")
type key string
ctx := context.WithValue(context.Background(), key("foo"), "bar")
dialer := FromEnvironmentUsing(funcFailDialer(func(ctx context.Context) error {
if got := ctx.Value(key("foo")); got != "bar" {
t.Errorf("Resolver context = %T %v, want %q", got, got, "bar")
}
return errFoo
}))
_, err := dialer.(ContextDialer).DialContext(ctx, "tcp", "foo.tld:123")
if err == nil {
t.Fatalf("unexpected success")
}
if !strings.Contains(err.Error(), errFoo.Error()) {
t.Errorf("got unexpected error %q; want substr %q", err, errFoo)
}
}
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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