newmediamonitoring/polls/consumers.py

import json
from asgiref.sync import async_to_sync
from channels.generic.websocket import AsyncJsonWebsocketConsumer


class ChatConsumer(AsyncJsonWebsocketConsumer):
    async def connect(self):
        print('connect')
        self.room_name = self.scope['url_route']['kwargs']['room_name']
        self.room_group_name = self.room_name

        # Join room group
        await self.channel_layer.group_add(
            self.room_group_name,
            self.channel_name
        )

        await self.accept()

    async def disconnect(self, close_code):
        # Leave room group
        await self.channel_layer.group_discard(
            self.room_group_name,
            self.channel_name
        )

    # Receive message from WebSocket
    async def receive_json(self, content):
        print('receive from websock', content)

        # Send message to room group
        await self.channel_layer.group_send(
            self.room_group_name,
            {
                'type': 'chat_message',
                'message': content['message']
            }
        )

    # Receive message from room group
    async def chat_message(self, event):
        print('receive from room group', event)
        # Send message to WebSocket
        await self.send_json({
            'message': event['message']
        })