custom auth django channels
Step 1: Install Django Channels
pip install channels
Step 2: Create a new Django Channels project
django-admin startproject myproject
cd myproject
Step 3: Install Channels Redis for handling WebSocket connections
pip install channels_redis
Step 4: Update Django settings to use Channels and Channels Redis
# myproject/settings.py
INSTALLED_APPS = [
# ...
'channels',
]
# Use Channels as the default ASGI application
ASGI_APPLICATION = 'myproject.asgi.application'
# Configure Channels layer to use Redis as a backing store
CHANNEL_LAYERS = {
'default': {
'BACKEND': 'channels_redis.core.RedisChannelLayer',
'CONFIG': {
"hosts": [('127.0.0.1', 6379)],
},
},
}
Step 5: Create a custom authentication backend
# myproject/authentication.py
from django.contrib.auth.backends import BaseBackend
from django.contrib.auth.models import User
class CustomAuthBackend(BaseBackend):
def authenticate(self, request, username=None, password=None, kwargs):
# Your custom authentication logic here
user = User.objects.get(username=username)
if user.check_password(password):
return user
return None
def get_user(self, user_id):
try:
return User.objects.get(pk=user_id)
except User.DoesNotExist:
return None
Step 6: Update Django settings to use the custom authentication backend
# myproject/settings.py
AUTHENTICATION_BACKENDS = [
# ...
'myproject.authentication.CustomAuthBackend',
]
Step 7: Implement authentication in Django Channels consumers
# myapp/consumers.py
from channels.generic.websocket import AsyncWebsocketConsumer
from channels.db import database_sync_to_async
from django.contrib.auth import get_user_model
class CustomAuthConsumer(AsyncWebsocketConsumer):
async def connect(self):
# Authenticate user using the custom backend
user = await self.get_user(self.scope['user'])
if user.is_authenticated:
# Accept the WebSocket connection
await self.accept()
else:
# Reject the connection
await self.close()
@database_sync_to_async
def get_user(self, user_id):
User = get_user_model()
try:
return User.objects.get(pk=user_id)
except User.DoesNotExist:
return None
Step 8: Update routing to use the custom consumer
# myproject/routing.py
from channels.routing import ProtocolTypeRouter, URLRouter
from channels.auth import AuthMiddlewareStack
from myapp.consumers import CustomAuthConsumer
application = ProtocolTypeRouter({
'websocket': AuthMiddlewareStack(
URLRouter(
[
# Add your WebSocket consumers here
path('ws/some_path/', CustomAuthConsumer.as_asgi()),
]
)
),
})
Step 9: Include the routing configuration in the Django project
# myproject/asgi.py
import os
from django.core.asgi import get_asgi_application
from channels.routing import ProtocolTypeRouter, URLRouter
from myproject.routing import application
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'myproject.settings')
django_asgi_app = get_asgi_application()
application = ProtocolTypeRouter({
"http": django_asgi_app,
"websocket": application,
})
Step 10: Run the Channels development server
daphne myproject.asgi:application