// Use golang.org/x/net/proxy package to make a socks5 client.
// For more information, see DefaultTransport in net.http package.
func Socks5Client(conf ProxyConfig) (client *http.Client, err error) {
var proxyAuth *proxy.Auth
if conf.Username != "" {
proxyAuth = new(proxy.Auth)
proxyAuth.User = conf.Username
proxyAuth.Password = conf.Password
}
dialer, err := proxy.SOCKS5(
"tcp",
conf.Addr,
proxyAuth,
&net.Dialer{
Timeout: 30 * time.Second,
KeepAlive: 30 * time.Second,
})
if err != nil {
return
}
var transport http.RoundTripper = &http.Transport{
Proxy: nil,
Dial: dialer.Dial,
TLSHandshakeTimeout: 10 * time.Second,
}
client = &http.Client{Transport: transport}
return
}
func parseProxy(addr string) (*http.Client, error) {
u, err := url.Parse(addr)
if err != nil {
return nil, err
}
switch u.Scheme {
case "socks5":
forward := &net.Dialer{
Timeout: 5 * time.Second,
KeepAlive: 30 * time.Second,
}
var auth *proxy.Auth
if u.User != nil {
auth = &proxy.Auth{}
auth.User = u.User.Username()
auth.Password, _ = u.User.Password()
}
dialer, err := proxy.SOCKS5("tcp", u.Host, auth, forward)
if err != nil {
return nil, err
}
transport := &http.Transport{
Dial: dialer.Dial,
TLSHandshakeTimeout: 10 * time.Second,
}
return &http.Client{
Transport: transport,
}, nil
case "http", "https":
transport := &http.Transport{
Proxy: http.ProxyURL(u),
Dial: (&net.Dialer{
Timeout: 5 * time.Second,
KeepAlive: 30 * time.Second,
}).Dial,
TLSHandshakeTimeout: 10 * time.Second,
}
return &http.Client{
Transport: transport,
}, nil
default:
return nil, errors.New("proxy: unsupported proxy type")
}
}