Question

我正在使用Flask开发一个基本的Web消息传递应用程序，该应用程序是使用带有gunicorn作为wsgi和nginx作为代理服务器的docker进行部署的。运行容器时，一切都在localhost上运行，但是当我尝试通过套接字将消息发送到运行相同容器星座的远程服务器时，出现错误。更具体地说，我被告知套接字超时。这很奇怪，因为所有非套接字的交互都非常快，而实际上并没有增加计算强度（在本地工作时，消息几乎是立即发送的。）

我正在使用的套接字框架是Flask-SocketIO，并且正在使用eventlet处理消息。我的用户发送消息时的接收和发送功能是通过以下代码完成的：

@socketio.on('post message')
def add_new_msg(data):
    data['isPending'] = False
    if len(data['message']) <= 0:
        return
    sql_query = 'INSERT INTO messages (chatroomid, messagecontent, timestamp, sendername) '
    sql_query += 'SELECT :chatroomid, :messagecontent, :timestamp, :sendername '
    sql_query += 'WHERE EXISTS (SELECT 1 FROM chatrooms WHERE chatroomid = :chatroomid)'
    row_count = db.execute(sql_query, {
                'chatroomid': data['roomId'],
                'messagecontent': data['message'],
                'timestamp': data['timestamp'],
                'sendername': data['username']
                }).rowcount
    db.commit()
    if row_count > 0:
        emit('server message callback', data, broadcast=True)

提前感谢您的任何建议。

编辑： 添加了错误日志。

app_1         | [2019-06-16 13:53:59 +0000] [8] [ERROR] Socket error processing request.
app_1         | Traceback (most recent call last):
app_1         |   File "/usr/local/lib/python3.6/site-packages/gunicorn/workers/base_async.py", line 66, in handle
app_1         |     six.reraise(*sys.exc_info())
app_1         |   File "/usr/local/lib/python3.6/site-packages/gunicorn/six.py", line 625, in reraise
app_1         |     raise value
app_1         |   File "/usr/local/lib/python3.6/site-packages/gunicorn/workers/base_async.py", line 56, in handle
app_1         |     self.handle_request(listener_name, req, client, addr)
app_1         |   File "/usr/local/lib/python3.6/site-packages/gunicorn/workers/base_async.py", line 129, in handle_request
app_1         |     six.reraise(*sys.exc_info())
app_1         |   File "/usr/local/lib/python3.6/site-packages/gunicorn/six.py", line 625, in reraise
app_1         |     raise value
app_1         |   File "/usr/local/lib/python3.6/site-packages/gunicorn/workers/base_async.py", line 107, in handle_request
app_1         |     respiter = self.wsgi(environ, resp.start_response)
app_1         |   File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 2309, in __call__
app_1         |     return self.wsgi_app(environ, start_response)
app_1         |   File "/usr/local/lib/python3.6/site-packages/flask_socketio/__init__.py", line 44, in __call__
app_1         |     start_response)
app_1         |   File "/usr/local/lib/python3.6/site-packages/engineio/middleware.py", line 59, in __call__
app_1         |     return self.engineio_app.handle_request(environ, start_response)
app_1         |   File "/usr/local/lib/python3.6/site-packages/socketio/server.py", line 428, in handle_request
app_1         |     return self.eio.handle_request(environ, start_response)
app_1         |   File "/usr/local/lib/python3.6/site-packages/engineio/server.py", line 340, in handle_request
app_1         |     environ, start_response)
app_1         |   File "/usr/local/lib/python3.6/site-packages/engineio/socket.py", line 106, in handle_get_request
app_1         |     start_response)
app_1         |   File "/usr/local/lib/python3.6/site-packages/engineio/socket.py", line 146, in _upgrade_websocket
app_1         |     return ws(environ, start_response)
app_1         |   File "/usr/local/lib/python3.6/site-packages/engineio/async_drivers/eventlet.py", line 20, in __call__
app_1         |     return super(WebSocketWSGI, self).__call__(environ, start_response)
app_1         |   File "/usr/local/lib/python3.6/site-packages/eventlet/websocket.py", line 130, in __call__
app_1         |     self.handler(ws)
app_1         |   File "/usr/local/lib/python3.6/site-packages/engineio/socket.py", line 160, in _websocket_handler
app_1         |     pkt = ws.wait()
app_1         |   File "/usr/local/lib/python3.6/site-packages/eventlet/websocket.py", line 788, in wait
app_1         |     for i in self.iterator:
app_1         |   File "/usr/local/lib/python3.6/site-packages/eventlet/websocket.py", line 643, in _iter_frames
app_1         |     message = self._recv_frame(message=fragmented_message)
app_1         |   File "/usr/local/lib/python3.6/site-packages/eventlet/websocket.py", line 669, in _recv_frame
app_1         |     header = recv(2)
app_1         |   File "/usr/local/lib/python3.6/site-packages/eventlet/websocket.py", line 578, in _get_bytes
app_1         |     d = self.socket.recv(numbytes - len(data))
app_1         |   File "/usr/local/lib/python3.6/site-packages/eventlet/greenio/base.py", line 366, in recv
app_1         |     return self._recv_loop(self.fd.recv, b'', bufsize, flags)
app_1         |   File "/usr/local/lib/python3.6/site-packages/eventlet/greenio/base.py", line 360, in _recv_loop
app_1         |     self._read_trampoline()
app_1         |   File "/usr/local/lib/python3.6/site-packages/eventlet/greenio/base.py", line 331, in _read_trampoline
app_1         |     timeout_exc=socket_timeout('timed out'))
app_1         |   File "/usr/local/lib/python3.6/site-packages/eventlet/greenio/base.py", line 210, in _trampoline
app_1         |     mark_as_closed=self._mark_as_closed)
app_1         |   File "/usr/local/lib/python3.6/site-packages/eventlet/hubs/__init__.py", line 159, in trampoline
app_1         |     return hub.switch()
app_1         |   File "/usr/local/lib/python3.6/site-packages/eventlet/hubs/hub.py", line 298, in switch
app_1         |     return self.greenlet.switch()
app_1         | socket.timeout: timed out

Answer 1

嗯-我对此感到有点傻。放弃然后尝试向某人展示工作中的错误后，我发现该应用程序运行正常。那时我意识到我家的wifi必须以某种方式阻止服务器发回套接字响应。所以真的很有效-感谢Miguel坚持与我合作！

使用Web服务器而不是localhost时Flask SocketIO超时

1 个答案: