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django channels jwt auth
#Channels 3 auth is different from channels 2 you will have to create your own auth middleware for that start by creating a file channelsmiddleware.py
#authmiddleware.py
"""General web socket middlewares
"""
from channels.db import database_sync_to_async
from django.contrib.auth import get_user_model
from django.contrib.auth.models import AnonymousUser
from rest_framework_simplejwt.exceptions import InvalidToken, TokenError
from rest_framework_simplejwt.tokens import UntypedToken
from rest_framework_simplejwt.authentication import JWTTokenUserAuthentication
from rest_framework_simplejwt.state import User
from channels.middleware import BaseMiddleware
from channels.auth import AuthMiddlewareStack
from django.db import close_old_connections
from urllib.parse import parse_qs
from jwt import decode as jwt_decode
from django.conf import settings
@database_sync_to_async
def get_user(validated_token):
try:
user = get_user_model().objects.get(id=validated_token["user_id"])
# return get_user_model().objects.get(id=toke_id)
print(f"{user}")
return user
except User.DoesNotExist:
return AnonymousUser()
class JwtAuthMiddleware(BaseMiddleware):
def __init__(self, inner):
self.inner = inner
async def __call__(self, scope, receive, send):
# Close old database connections to prevent usage of timed out connections
close_old_connections()
# Get the token
token = parse_qs(scope["query_string"].decode("utf8"))["token"][0]
# Try to authenticate the user
try:
# This will automatically validate the token and raise an error if token is invalid
UntypedToken(token)
except (InvalidToken, TokenError) as e:
# Token is invalid
print(e)
return None
else:
# Then token is valid, decode it
decoded_data = jwt_decode(token, settings.SECRET_KEY, algorithms=["HS256"])
print(decoded_data)
# Will return a dictionary like -
# {
# "token_type": "access",
# "exp": 1568770772,
# "jti": "5c15e80d65b04c20ad34d77b6703251b",
# "user_id": 6
# }
# Get the user using ID
scope["user"] = await get_user(validated_token=decoded_data)
return await super().__call__(scope, receive, send)
def JwtAuthMiddlewareStack(inner):
return JwtAuthMiddleware(AuthMiddlewareStack(inner))
#you cant then import it into your consumer's routing.py or asgi.py file like this
#asgi.py
"""
ASGI config for config project.
It exposes the ASGI callable as a module-level variable named ``application``.
For more information on this file, see
https://docs.djangoproject.com/en/3.1/howto/deployment/asgi/
"""
import os
from channels.routing import ProtocolTypeRouter, URLRouter
from channels.auth import AuthMiddlewareStack
from django.core.asgi import get_asgi_application
from channels.security.websocket import AllowedHostsOriginValidator
from chat.consumers import ChatConsumer
from django.urls import path, re_path
from .channelsmiddleware import JwtAuthMiddlewareStack
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "config.settings.dev")
application = ProtocolTypeRouter(
{
"http": get_asgi_application(),
"websocket": AllowedHostsOriginValidator(
JwtAuthMiddlewareStack(
URLRouter(
[
#path(),your routes here
]
)
),
),
}
)
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