redis installed in docker windows having Redis channel connection issue with websocket

Using Django Async/Channels
1

Hello everyone, I am just following the tutorials on the channels 2, using daphane async from django channels documentation.

where everything works just fine as the documentation untill I tried redis with it. I have follow the exact coding as per the documentation then I get the below errors when connecting to websocket with redis.

This is how I have installed redis in my windows docker

docker run --name redis -d -p 6379:6379 --rm redis

given that I am able to ping redis using redis-cli

image
image530×122 5.97 KB

Here are my settings.py config

CHANNEL_LAYERS = {
    # "default": {
    #     "BACKEND": "channels.layers.InMemoryChannelLayer"
    # },
    "default": {
        "BACKEND": "channels_redis.core.RedisChannelLayer",
        "CONFIG": {
            # "hosts": [("redis", 6379)],
            # "hosts": [("localhost", 6379)],
            "hosts": [("127.0.0.1", 6379)],
            # "hosts": ["redis://redis:6379/1"],
        },
    },
}

My consumer.py exactly same as in the documentation tutorial

# chat/consumers.py
import json

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}"

        # 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(self, text_data):
        text_data_json = json.loads(text_data)
        message = text_data_json["message"]

        # Send message to room group
        await self.channel_layer.group_send(
            self.room_group_name, {"type": "chat.message", "message": message}
        )

    # Receive message from room group
    async def chat_message(self, event):
        message = event["message"]

        # Send message to WebSocket
        await self.send(text_data=json.dumps({"message": message}))

this is the error

WebSocket HANDSHAKING /ws/chat/anonymous/7f2e3798_bf6a_440c_b3a1_3e73ae6bb4af/ [127.0.0.1:61238]
Room Name:  7f2e3798_bf6a_440c_b3a1_3e73ae6bb4af
Exception inside application: 'RedisChannelLayer' object has no attribute 'valid_channel_name'
Traceback (most recent call last):
  File "C:\Users\JoydipNath(RAPP)\AppData\Local\Programs\Python\Python311\Lib\site-packages\channels\utils.py", line 50, in await_many_dispatch
    await dispatch(result)
  File "C:\Users\JoydipNath(RAPP)\AppData\Local\Programs\Python\Python311\Lib\site-packages\channels\consumer.py", line 74, in dispatch
    await handler(message)
  File "C:\Users\JoydipNath(RAPP)\AppData\Local\Programs\Python\Python311\Lib\site-packages\channels\generic\websocket.py", line 180, in websocket_connect
    await self.connect()
  File "C:\Users\JoydipNath(RAPP)\PycharmProjects\ClearMyMind\RTCHAT\utils\anonymous_consumer.py", line 19, in connect
    await self.channel_layer.group_add(self.room_group_name, self.channel_name)
  File "C:\Users\JoydipNath(RAPP)\AppData\Local\Programs\Python\Python311\Lib\site-packages\channels_redis\core.py", line 485, in group_add
    assert self.valid_group_name(group), "Group name not valid"
           ^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'RedisChannelLayer' object has no attribute 'valid_group_name'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\JoydipNath(RAPP)\AppData\Local\Programs\Python\Python311\Lib\site-packages\django\contrib\staticfiles\handlers.py", line 101, in __call__
    return await self.application(scope, receive, send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\JoydipNath(RAPP)\AppData\Local\Programs\Python\Python311\Lib\site-packages\channels\routing.py", line 48, in __call__
    return await application(scope, receive, send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\JoydipNath(RAPP)\AppData\Local\Programs\Python\Python311\Lib\site-packages\channels\security\websocket.py", line 37, in __call__
    return await self.application(scope, receive, send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\JoydipNath(RAPP)\AppData\Local\Programs\Python\Python311\Lib\site-packages\channels\sessions.py", line 44, in __call__
    return await self.inner(dict(scope, cookies=cookies), receive, send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\JoydipNath(RAPP)\AppData\Local\Programs\Python\Python311\Lib\site-packages\channels\sessions.py", line 261, in __call__
    return await self.inner(wrapper.scope, receive, wrapper.send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\JoydipNath(RAPP)\AppData\Local\Programs\Python\Python311\Lib\site-packages\channels\auth.py", line 185, in __call__
    return await super().__call__(scope, receive, send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\JoydipNath(RAPP)\AppData\Local\Programs\Python\Python311\Lib\site-packages\channels\middleware.py", line 24, in __call__
    return await self.inner(scope, receive, send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\JoydipNath(RAPP)\AppData\Local\Programs\Python\Python311\Lib\site-packages\channels\routing.py", line 118, in __call__
    return await application(
           ^^^^^^^^^^^^^^^^^^
  File "C:\Users\JoydipNath(RAPP)\AppData\Local\Programs\Python\Python311\Lib\site-packages\channels\consumer.py", line 95, in app
    return await consumer(scope, receive, send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\JoydipNath(RAPP)\AppData\Local\Programs\Python\Python311\Lib\site-packages\channels\consumer.py", line 58, in __call__
    await await_many_dispatch(

Package versions

Django==5.1.5
channels==4.2.1
daphne==4.1.2
channels-redis==4.2.1
hiredis==3.1.0
django-redis==5.4.0

It will be great if I can get some help from community, looking forward to it.

Thank you

2

What I believe the key part of the error is:

From the docs at Channel Layers — Channels 4.2.0 documentation :

Group names are restricted to ASCII alphanumerics, hyphens, and periods only and are limited to a maximum length of 100 in the default backend.

I don’t believe the underscore is valid within a group name.

3

Thank you for your reply, I have tried with hardcoded group name as test it still does not work.

4

Please post the complete error for this attempt.

5

Already posted the complete error, this is the exact error I get every time.

6

In addition to posting the new complete error message, also please post your INSTALLED_APPS setting, and the complete asgi.py file along with any user-written files imported by asgi.py, such as a routing file.