'timeout' 事件
当底层套接字因不活动而超时时触发。 这仅通知套接字已空闲。 必须手动销毁请求。
另见: request.setTimeout()
。
Emitted when the underlying socket times out from inactivity. This only notifies that the socket has been idle. The request must be destroyed manually.
See also: request.setTimeout()
.