动态消息更新处理

src/app/services/websocket.service.ts

@@ -22,7 +22,7 @@ export class WebsocketService {
                 console.log('websocket was connected...')
             }
             this.websocket.onmessage = (event) => {
-                ob.next(event)
+                ob.next(event.data)
             }
             this.websocket.onerror = () => {
                 ob.error("连接失败")