Django 通道 websocket 重新连接

Question

我正在 Django 中构建一个消息传递系统，使用 web-socket 接收消息。

下面是我的试听课

from channels.consumer import AsyncConsumer
from channels.db import database_sync_to_async

class ChatConsumer(AsyncConsumer):

    async def websocket_connect(self, event):
        print("connected", event)
        await self.send({
            "type": "websocket.accept"
        })

    async def websocket_receive(self, event):
        print("receive", event)
        message = event['text']
        obj = await self.create_obj(message=message)
        print('Created...')

    async def websocket_disconnect(self, event):
        print("disconnected", event)

    @database_sync_to_async
    def create_obj(self, **kwargs):
        obj = ChatMessage.objects.create(message=kwargs['message'])
        return obj

当我启动客户端应用程序时，网络套接字已连接，我可以接收消息并且可以存储到数据库中。

connected {'type': 'websocket.connect'}
WebSocket CONNECT /ws/message [192.168.0.101:50148]

一段时间后，网络套接字会自动断开连接，

Application instance <Task pending coro=<SessionMiddlewareInstance.__call__() running at /Users/ajay/Desktop/workspace/projects/python/django/websock/venv/lib/python3.7/site-packages/channels/sessions.py:183> wait_for=<Future pending cb=[<TaskWakeupMethWrapper object at 0x10b311510>()]>> for connection <WebSocketProtocol client=['192.168.0.101', 50148] path=b'/ws/message'> took too long to shut down and was killed.

断开连接后，我无法收到消息，当我重新加载客户端时，web-socket 已连接，有没有办法自动重新连接 we-socket 而无需重新加载客户端。 我要求指导我一些建议来实现这一点，这对我很有帮助，在此先感谢。

Answer 1

看来您的客户端终止了连接。当用作客户端导入 websockets 时，我遇到了同样的问题。

 # part of Client Code in the main while loop
 while not self.finished:
        try:
            self.websocket = await websockets.client.connect(
                self.connect_url,
                max_size=None,
                extra_headers=self.extra_headers
            )
.....
# in your`s producer
.......
 while True:
        # Make sure connection is still live.
        pong_waiter = await self.websocket.ping()
        await pong_waiter # if you will not await in 10-20 sec connection will close.

Answer 2

这是旧的，但这个答案可能对其他人有所帮助。 您可以使用https://www.npmjs.com/package/reconnecting-websocket