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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,151 @@ | ||
| package brook | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "errors" | ||
| "io" | ||
| "log" | ||
| "net" | ||
| "time" | ||
|
|
||
| "golang.org/x/net/proxy" | ||
| ) | ||
|
|
||
| type Socks5ToHTTP struct { | ||
| Address string | ||
| Socks5Address string | ||
| Dial proxy.Dialer | ||
| Timeout int | ||
| Deadline int | ||
| Listen net.Listener | ||
| HTTPMiddleman HTTPMiddleman | ||
| } | ||
|
|
||
| func NewSocks5ToHTTP(addr, socks5addr string, timeout, deadline int) (*Socks5ToHTTP, error) { | ||
| dial, err := proxy.SOCKS5("tcp", socks5addr, nil, proxy.Direct) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &Socks5ToHTTP{ | ||
| Address: addr, | ||
| Socks5Address: socks5addr, | ||
| Dial: dial, | ||
| Timeout: timeout, | ||
| Deadline: deadline, | ||
| }, nil | ||
| } | ||
|
|
||
| func (s *Socks5ToHTTP) ListenAndServe(h HTTPMiddleman) error { | ||
| ta, err := net.ResolveTCPAddr("tcp", s.Address) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| l, err := net.ListenTCP("tcp", ta) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer l.Close() | ||
| s.Listen = l | ||
| s.HTTPMiddleman = h | ||
| for { | ||
| conn, err := l.AcceptTCP() | ||
| if err != nil { | ||
| return err | ||
| } | ||
| go func(conn *net.TCPConn) { | ||
| if err := s.handle(conn); err != nil { | ||
| log.Println(err) | ||
| } | ||
| }(conn) | ||
| } | ||
| } | ||
|
|
||
| func (s *Socks5ToHTTP) Shutdown() error { | ||
| if s.Listen == nil { | ||
| return nil | ||
| } | ||
| return s.Listen.Close() | ||
| } | ||
|
|
||
| func (s *Socks5ToHTTP) handle(conn *net.TCPConn) error { | ||
| defer conn.Close() | ||
| if s.Timeout != 0 { | ||
| if err := conn.SetKeepAlivePeriod(time.Duration(s.Timeout) * time.Second); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| if s.Deadline != 0 { | ||
| if err := conn.SetDeadline(time.Now().Add(time.Duration(s.Deadline) * time.Second)); err != nil { | ||
| return err | ||
| } | ||
| } | ||
|
|
||
| b := make([]byte, 0, 1024) | ||
| for { | ||
| var b1 [1024]byte | ||
| n, err := conn.Read(b1[:]) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| b = append(b, b1[:n]...) | ||
| if bytes.Contains(b, []byte{0x0d, 0x0a, 0x0d, 0x0a}) { | ||
| break | ||
| } | ||
| } | ||
|
|
||
| bb := bytes.SplitN(b, []byte(" "), 3) | ||
| if len(bb) != 3 { | ||
| return errors.New("Invalid Request") | ||
| } | ||
| method, address := string(bb[0]), string(bb[1]) | ||
| var addr string | ||
| if method == "CONNECT" { | ||
| addr = address | ||
| } else { | ||
| var err error | ||
| addr, err = GetAddressFromURL(address) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
|
|
||
| if s.HTTPMiddleman != nil { | ||
| if handled, err := s.HTTPMiddleman.HandleHTTPProxy(method, addr, b, conn); err != nil || handled { | ||
| return err | ||
| } | ||
| } | ||
|
|
||
| rc, err := s.Dial.Dial("tcp", addr) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer rc.Close() | ||
| if s.Timeout != 0 { | ||
| if rtc, ok := rc.(*net.TCPConn); ok { | ||
| if err := rtc.SetKeepAlivePeriod(time.Duration(s.Timeout) * time.Second); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| } | ||
| if s.Deadline != 0 { | ||
| if err := rc.SetDeadline(time.Now().Add(time.Duration(s.Deadline) * time.Second)); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| if method == "CONNECT" { | ||
| _, err := conn.Write([]byte("HTTP/1.1 200 Connection established\r\n\r\n")) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
| if method != "CONNECT" { | ||
| if _, err := rc.Write(b); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| go func() { | ||
| _, _ = io.Copy(rc, conn) | ||
| }() | ||
| _, _ = io.Copy(conn, rc) | ||
| return nil | ||
| } |