format

main.go

@@ -21,8 +21,8 @@ func makeServers(cfg conf) {
 		if err != nil {
 			log.Fatalf("parse %s, error %s", c.Listen, err)
 		}
-		switch u.Scheme {
 
+		switch u.Scheme {
 		case "ws":
 			exists := false
 			for i := 0; i < len(wsservers); i++ {
@@ -35,7 +35,6 @@ func makeServers(cfg conf) {
 			if !exists {
 				wsservers = append(wsservers, wsServer{u.Host, []forwardRule{{u.Path, c.Remote}}})
 			}
-
 		case "tcp":
 			tcpservers = append(tcpservers, tcpServer{u.Host, c.Remote})
 		default:
@@ -46,6 +45,7 @@ func makeServers(cfg conf) {
 	for _, srv := range wsservers {
 		go srv.run()
 	}
+
 	for _, srv := range tcpservers {
 		go srv.run()
 	}
@@ -64,6 +64,7 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
+
 	var cfg conf
 	if err := yaml.Unmarshal(data, &cfg); err != nil {
 		log.Fatal(err)

server.go

@@ -35,10 +35,12 @@ var upgrader = websocket.Upgrader{
 	ReadBufferSize:  1024,
 	WriteBufferSize: 1024,
 }
+
 var dialer = &websocket.Dialer{}
 
 func forwardWS2WS(conn, conn1 *websocket.Conn) {
 	ch := make(chan struct{}, 2)
+
 	go func() {
 		for {
 			t, data, err := conn.ReadMessage()
@@ -54,6 +56,7 @@ func forwardWS2WS(conn, conn1 *websocket.Conn) {
 		}
 		ch <- struct{}{}
 	}()
+
 	go func() {
 		for {
 			t, data, err := conn1.ReadMessage()
@@ -68,14 +71,14 @@ func forwardWS2WS(conn, conn1 *websocket.Conn) {
 			}
 		}
 		ch <- struct{}{}
-
 	}()
+
 	<-ch
 }
 
 func forwardWS2TCP(conn1 *websocket.Conn, conn2 net.Conn) {
-
 	ch := make(chan struct{}, 2)
+
 	go func() {
 		for {
 			_, data, err := conn1.ReadMessage()
@@ -83,6 +86,7 @@ func forwardWS2TCP(conn1 *websocket.Conn, conn2 net.Conn) {
 				log.Errorln(err)
 				break
 			}
+
 			_, err = conn2.Write(data)
 			if err != nil {
 				log.Errorln(err)
@@ -91,14 +95,17 @@ func forwardWS2TCP(conn1 *websocket.Conn, conn2 net.Conn) {
 		}
 		ch <- struct{}{}
 	}()
+
 	go func() {
 		buf := make([]byte, 1024)
+
 		for {
 			n, err := conn2.Read(buf)
 			if err != nil {
 				log.Errorln(err)
 				break
 			}
+
 			err = conn1.WriteMessage(websocket.BinaryMessage, buf[:n])
 			if err != nil {
 				log.Errorln(err)
@@ -107,11 +114,13 @@ func forwardWS2TCP(conn1 *websocket.Conn, conn2 net.Conn) {
 		}
 		ch <- struct{}{}
 	}()
+
 	<-ch
 }
 
 func forwardTCP2TCP(c1, c2 net.Conn) {
 	ch := make(chan struct{}, 2)
+
 	go func() {
 		_, err := io.Copy(c1, c2)
 		if err != nil {
@@ -119,6 +128,7 @@ func forwardTCP2TCP(c1, c2 net.Conn) {
 		}
 		ch <- struct{}{}
 	}()
+
 	go func() {
 		_, err := io.Copy(c2, c1)
 		if err != nil {
@@ -126,6 +136,7 @@ func forwardTCP2TCP(c1, c2 net.Conn) {
 		}
 		ch <- struct{}{}
 	}()
+
 	<-ch
 }
 
@@ -142,6 +153,7 @@ func (wss *wsServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "not found", http.StatusNotFound)
 		return
 	}
+
 	conn, err := upgrader.Upgrade(w, r, nil)
 	if err != nil {
 		log.Errorln(err)
@@ -159,11 +171,12 @@ func (wss *wsServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 		resp.Body.Close()
-		defer conn1.Close()
 		if resp.StatusCode != http.StatusSwitchingProtocols {
 			log.Errorf("dial remote ws %d", resp.StatusCode)
 			return
 		}
+		defer conn1.Close()
+
 		forwardWS2WS(conn, conn1)
 		return
 	}
@@ -175,6 +188,7 @@ func (wss *wsServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 		defer conn1.Close()
+
 		forwardWS2TCP(conn, conn1)
 		return
 	}
@@ -188,6 +202,7 @@ func (srv *tcpServer) run() {
 		return
 	}
 	defer l.Close()
+
 	for {
 		conn, err := l.Accept()
 		if err != nil {
@@ -210,11 +225,12 @@ func (srv *tcpServer) serve(c net.Conn) {
 			return
 		}
 		resp.Body.Close()
-		defer conn1.Close()
 		if resp.StatusCode != http.StatusSwitchingProtocols {
 			log.Errorf("dial remote ws %d", resp.StatusCode)
 			return
 		}
+		defer conn1.Close()
+
 		forwardWS2TCP(conn1, c)
 		return
 	}
@@ -226,8 +242,10 @@ func (srv *tcpServer) serve(c net.Conn) {
 			return
 		}
 		defer conn1.Close()
+
 		forwardTCP2TCP(c, conn1)
 		return
 	}
+
 	log.Errorf("unsupported scheme %s", u.Scheme)
 }