'timeout' 事件
如果套接字因不活动而超时则触发。 这只是通知套接字已空闲。 用户必须手动关闭连接。
另见: socket.setTimeout()
。
Emitted if the socket times out from inactivity. This is only to notify that the socket has been idle. The user must manually close the connection.
See also: socket.setTimeout()
.