code refactor for common package

pkg/common/util/ws/ws.go

@@ -0,0 +1,41 @@
+package ws
+
+import (
+	"net"
+	"time"
+
+	"github.com/gorilla/websocket"
+)
+
+type websocketConn struct {
+	*websocket.Conn
+	rb []byte
+}
+
+func WebsocketServerConn(conn *websocket.Conn) net.Conn {
+	return &websocketConn{
+		Conn: conn,
+	}
+}
+
+func (c *websocketConn) Read(b []byte) (n int, err error) {
+	if len(c.rb) == 0 {
+		_, c.rb, err = c.ReadMessage()
+	}
+	n = copy(b, c.rb)
+	c.rb = c.rb[n:]
+	return
+}
+
+func (c *websocketConn) Write(b []byte) (n int, err error) {
+	err = c.WriteMessage(websocket.BinaryMessage, b)
+	n = len(b)
+	return
+}
+
+func (c *websocketConn) SetDeadline(t time.Time) error {
+	if err := c.SetReadDeadline(t); err != nil {
+		return err
+	}
+	return c.SetWriteDeadline(t)
+}