WebSocket-соединение с 'ws://127.0.0.1:8000/ws/work/' не удалось:

Я не могу получить доступ к WebSocket, пока следую этому проекту: https://www.youtube.com/watch?v=SF1k_Twr9cg&t=2498s&ab_channel=CodeWithStein. С 47:23

consumers.py import json

from channels.generic.websocket import AsyncWebsocketConsumer from asgiref.sync import sync_to_async

class ChatConsumer(AsyncWebsocketConsumer): async def connect(self): self.room_name = self.scope['url_route']['kwargs']['room_name'] self.room_group_name = 'chat_%s' % self.room_name

    await self.channel_layer.group_add(
        self.room_group_name,
        self.channel_name
    )

    await self.accept

async def disconnect(self):
    await self.channel_layer.group_discard(
        self.room_group_name,
        self.channel_name
    )

routing.py
from django.urls import path
from . import consumers

websocket_urlpatterns = [
    path('ws/<str:room_name>/', consumers.ChatConsumer.as_asgi()),
]

asgi.py import os

from django.core.asgi import get_asgi_application

from channels.auth import AuthMiddlewareStack from channels.routing import ProtocolTypeRouter, URLRouter

import room.routing

os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'djangochat.settings')

application = ProtocolTypeRouter({ "http": get_asgi_application(), "websocket": AuthMiddlewareStack( URLRouter( room.routing.websocket_urlpatterns ) ) })

room.html
{% block scripts %} 
{{ room.slug|json_script:"json-roomname" }}
<script>
    const roomName = JSON.parse(document.getElementById("json-roomname").textContent);
    const chatSocket = new WebSocket(
        'ws://' 
        + window.location.host 
        + '/ws/'
        + roomName 
        + '/'
    );

    chatSocket.onmessage = function (e) {
        console.log("onmessage");
    }

    chatSocket.onclose = function (e) {
        console.log("onclose");
    }

</script>
{% endblock %}

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