hdws add ping and replace client

hdws/ws/client.go

@@ -46,3 +46,8 @@ func (c *Client) WriteJson(body interface{}) error {
 	}
 	return c.Write(bs)
 }
+
+func (c *Client) CloseWithJson(body interface{}) {
+	bs, _ := json.Marshal(&body)
+	c.CloseWithMsg(bs)
+}

hdws/ws/node.go

@@ -115,6 +115,16 @@ func (t *Node) RegisterClient(c *Client) error {
 	if room, ok := t.rooms[c.RoomId]; ok {
 		room.rwmux.Lock()
 		defer room.rwmux.Unlock()
+		if oc, exist := room.clients[c.Id]; exist {
+			oc.WriteJson(&Message{
+				Type: "close",
+				Data: map[string]interface{}{
+					"error_code": 302,
+					"error_msg":  "链接已被替换",
+				},
+			})
+			oc.Close()
+		}
 		room.clients[c.Id] = c
 		return nil
 	}