python - 什么可以关闭 websocket 连接？

Question

我使用websocket_server为了提供一种单向(服务器到客户端)Websocket 连接。

我在服务器上有几个线程，它们以给定的时间间隔(while True: ... time.sleep(60))查询 API，然后执行 server.send_message() 调用来更新客户端。所有这些都运行良好。

有时，没有任何特殊原因，我会崩溃:

Exception in thread Thread-3:
Traceback (most recent call last):
  File "C:\Python35\lib\threading.py", line 914, in _bootstrap_inner
    self.run()
  File "C:\Python35\lib\threading.py", line 862, in run
    self._target(*self._args, **self._kwargs)
  File "D:/Dropbox/dev/domotique/webserver.py", line 266, in calendar
    server.send_message(client, json.dumps({"calendar": events}))
  File "C:\Python35\lib\site-packages\websocket_server\websocket_server.py", line 71, in send_message
    self._unicast_(client, msg)
  File "C:\Python35\lib\site-packages\websocket_server\websocket_server.py", line 119, in _unicast_
    to_client['handler'].send_message(msg)
  File "C:\Python35\lib\site-packages\websocket_server\websocket_server.py", line 194, in send_message
    self.send_text(message)
  File "C:\Python35\lib\site-packages\websocket_server\websocket_server.py", line 240, in send_text
    self.request.send(header + payload)
BrokenPipeError: [WinError 10058] A request to send or receive data was disallowed because the socket had already been shut down in that direction with a previous shutdown call

我的代码中没有关闭调用。 还有什么可以关闭 websocket？

Answer 1

WebSocket客户端可以要求服务器关闭连接(或直接关闭)。来自 the library's code :

if not b1:
    logger.info("Client closed connection.")
    self.keep_alive = 0
    return
if opcode == CLOSE_CONN:
    logger.info("Client asked to close connection.")
    self.keep_alive = 0
    return

您可以检查self.keep_alive来了解套接字是否仍然打开。