/
proxy.go
57 lines (46 loc) · 1.4 KB
/
proxy.go
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// Package proxy implements the proxy logic (--proxy argument of the
// command-line tool).
package proxy
import (
"net"
"net/url"
"github.com/ameshkov/gocurl/internal/client/dialer"
"github.com/ameshkov/gocurl/internal/output"
"golang.org/x/net/proxy"
)
// Dialer implements dialer.Dialer interface and opens connections through the
// specified proxy.
type Dialer struct {
proxyDialer proxy.Dialer
out *output.Output
}
// type check
var _ dialer.Dialer = (*Dialer)(nil)
// NewProxyDialer creates a new instance of *ProxyDialer.
func NewProxyDialer(proxyURL *url.URL, forward dialer.Dialer, out *output.Output) (d *Dialer, err error) {
d = &Dialer{out: out}
d.proxyDialer, err = createProxyDialer(proxyURL, forward)
if err != nil {
return nil, err
}
out.Debug("Using proxy %s", proxyURL)
return d, nil
}
// Dial implements the dialer.Dialer interface for *ProxyDialer.
func (d *Dialer) Dial(network, addr string) (conn net.Conn, err error) {
d.out.Debug("Connecting through proxy to %s", addr)
conn, err = d.proxyDialer.Dial(network, addr)
if err != nil {
return nil, err
}
return conn, err
}
// createProxyDialer creates a proxy dialer from the specified URL.
func createProxyDialer(proxyURL *url.URL, f proxy.Dialer) (d proxy.Dialer, err error) {
switch proxyURL.Scheme {
case "socks5", "socks5h":
return createSOCKS5ProxyDialer(proxyURL)
default:
return proxy.FromURL(proxyURL, f)
}
}