问题描述

websocket方式连接Sanic服务器，经常断开连接。

解决方案

aiohttp throws CancelledError into coroutine if http connection was disconnected.¹

这个问题本源在于websocket连接断开了，在本例中因为websocket server是每隔几分钟推送有一次数据，时间间隔太长导致连接断开。进而导致如下错误：

websockets.exceptions.ConnectionClosedError: code = 1006 (connection closed abnormally [internal]), no reason

参见websockets.readthedocks.io :

code = 1006 means that the TCP connection was lost. As a consequence, the WebSocket connection was closed without receiving a close frame, which is the abnormal.

修改websocket client connect的参数ping_timeout = 60，默认是20s

import websockets
websockets.connect(uri, ping_timeout = 60)

问题解决。

References