Django channels and websocket not working - django

Question

I've checked all the related questions none of them helped me. I'm making a simple application where I will get JSON responses on the websocketking.com site. No matter how many times I make changes none of the tries are working.
here every detail
asgi.py file
import os
from channels.auth import AuthMiddlewareStack
from channels.routing import ProtocolTypeRouter, URLRouter
from django.core.asgi import get_asgi_application
from django.urls import path
from home.consumers import *
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'core.settings')
ws_patterns = [
path('ws/test/', TestConsumer),
]
application = ProtocolTypeRouter({
"http": get_asgi_application(),
"websocket": AuthMiddlewareStack(URLRouter(ws_patterns)),
})
consumers.py file
from channels.generic.websocket import WebsocketConsumer
from asgiref.sync import async_to_sync
import json
class TestConsumer(WebsocketConsumer):
def connect(self):
self.room_name = "test_consumer"
self.room_group_name = "test_consumer_group"
async_to_sync(self.channel_layer.group_add)(self.room_name, self.room_group_name)
self.accept()
self.send(text_data=json.dumps({'status' : 'connected'}))
def receive(self):
pass
def disconnect(self):
pass
These are the things I added in my settings.py file
ASGI_APPLICATION = 'core.asgi.application'
CHANNEL_LAYERS = {
"default": {
"BACKEND": "channels_redis.core.RedisChannelLayer",
"CONFIG": {
"hosts": [("localhost", 6379)],
},
},
}
And here is the error I got in console
WebSocket HANDSHAKING /ws/test/ [127.0.0.1:2795]
Exception inside application: object.__init__() takes exactly one argument (the instance to initialize)
Traceback (most recent call last):
File "D:\PythonProjects\channels_project\env\lib\site-packages\channels\staticfiles.py", line 44, in __call__
return await self.application(scope, receive, send)
File "D:\PythonProjects\channels_project\env\lib\site-packages\channels\routing.py", line 71, in __call__
return await application(scope, receive, send)
File "D:\PythonProjects\channels_project\env\lib\site-packages\channels\sessions.py", line 47, in __call__
return await self.inner(dict(scope, cookies=cookies), receive, send)
File "D:\PythonProjects\channels_project\env\lib\site-packages\channels\sessions.py", line 254, in __call__
return await self.inner(wrapper.scope, receive, wrapper.send)
File "D:\PythonProjects\channels_project\env\lib\site-packages\channels\auth.py", line 181, in __call__
return await super().__call__(scope, receive, send)
File "D:\PythonProjects\channels_project\env\lib\site-packages\channels\middleware.py", line 26, in __call__
return await self.inner(scope, receive, send)
File "D:\PythonProjects\channels_project\env\lib\site-packages\channels\routing.py", line 150, in __call__
return await application(
File "D:\PythonProjects\channels_project\env\lib\site-packages\asgiref\compatibility.py", line 33, in new_application
instance = application(scope)
File "D:\PythonProjects\channels_project\env\lib\site-packages\channels\generic\websocket.py", line 23, in __init__
super().__init__(*args, **kwargs)
TypeError: object.__init__() takes exactly one argument (the instance to initialize)
WebSocket DISCONNECT /ws/test/ [127.0.0.1:2795]

Answer 1

Maybe you've already solved this issue but here's some things I've noticed with your code which might help you:
Change WebsocketConsumer to AsyncWebsocketConsumer- Then change your consumer methods to async, e.g.
async def connect(self):
...
Change
async_to_sync(self.channel_layer.group_add)(self.room_name,
self.room_group_name)
to
await self.channel_layer.group_add(
self.room_name,
self.room_group_name)
As a side note:
You don't need to do self.send(msg) to check if you are connected. This is handled in self.accept() and will return to
client.onopen = () => {
console.log("connected");
}
If none of these sort your problem it may be an issue with your routing and/or the middleware stack. I have had issues with authentication recently. Try using a different browser if you're using Chrome and see if you can tag onto the onerror event