通过socket进行检测心跳，判断是否与服务器断开连接-Through the socket to detect heartbeat, to determine whether the connection with the server

长连接心跳包 可以为你的项目 需要实时获取到新数据这个完美的解决了你的问题(A long connection heartbeat package can get new data in real time for your project. This solves your problem perfectly)