advanced patterns in Django Channels with WebSocket Disconnects
I'm working with an scenario with Django Channels when handling WebSocket connections. My application is supposed to handle multiple clients, but I'm observing some unexpected behavior when a client disconnects abruptly. Specifically, I want to ensure that any unsent messages are properly handled or canceled if a client disconnects. I've implemented a consumer as follows: ```python from channels.generic.websocket import AsyncWebsocketConsumer class ChatConsumer(AsyncWebsocketConsumer): async def connect(self): self.room_name = self.scope['url_route']['kwargs']['room_name'] self.room_group_name = f'chat_{self.room_name}' await self.channel_layer.group_add( self.room_group_name, self.channel_name ) await self.accept() async def disconnect(self, close_code): # Here I want to cancel any pending messages for this user pass async def receive(self, text_data): # Logic to send messages to the group pass ``` The question arises in the `disconnect` method. When a client disconnects, I want to ensure that if there were any messages queued up for this client, they get canceled or cleaned up. However, I'm not sure how to track those pending messages or if there's a built-in way to handle this gracefully. I've tried using a list to keep track of messages in memory, but that approach seems inefficient and leads to memory leaks when clients disconnect. Additionally, I am receiving some warnings in the console like `Warning: Received a WebSocket message after the connection was closed.` which indicates that messages are still being sent even after the disconnect event. I’m using Django 4.0, Channels 3.0, and Redis as my channel layer backend. What’s the best practice to manage WebSocket disconnections and prevent sending messages to a client that is no longer connected? Any insights or alternative approaches would be greatly appreciated!