问如何在django通道上使用令牌身份验证来验证websocket？

EN

from django.contrib.auth.models import AnonymousUser
from rest_framework.authtoken.models import Token
from channels.db import database_sync_to_async
from channels.middleware import BaseMiddleware

@database_sync_to_async
def get_user(token_key):
    try:
        token = Token.objects.get(key=token_key)
        return token.user
    except Token.DoesNotExist:
        return AnonymousUser()

class TokenAuthMiddleware(BaseMiddleware):
    def __init__(self, inner):
        super().__init__(inner)

    async def __call__(self, scope, receive, send):
        try:
            token_key = (dict((x.split('=') for x in scope['query_string'].decode().split("&")))).get('token', None)
        except ValueError:
            token_key = None
        scope['user'] = AnonymousUser() if token_key is None else await get_user(token_key)
        return await super().__call__(scope, receive, send)

from channels.security.websocket import AllowedHostsOriginValidator
from channels.routing import ProtocolTypeRouter, URLRouter
from .middleware import TokenAuthMiddleware
from main.consumers import MainConsumer
from django.conf.urls import url

application = ProtocolTypeRouter({
        'websocket': AllowedHostsOriginValidator(
            TokenAuthMiddleware(
                URLRouter(
                    [
                        url(r"^main/$", MainConsumer.as_asgi()),
                    ]
                )
            )
        )
    })

from channels.auth import AuthMiddlewareStack
from rest_framework.authtoken.models import Token
from django.contrib.auth.models import AnonymousUser


class TokenAuthMiddleware:
    """
    Token authorization middleware for Django Channels 2
    """

    def __init__(self, inner):
        self.inner = inner

    def __call__(self, scope):
        headers = dict(scope['headers'])
        if b'authorization' in headers:
            try:
                token_name, token_key = headers[b'authorization'].decode().split()
                if token_name == 'Token':
                    token = Token.objects.get(key=token_key)
                    scope['user'] = token.user
            except Token.DoesNotExist:
                scope['user'] = AnonymousUser()
        return self.inner(scope)

TokenAuthMiddlewareStack = lambda inner: TokenAuthMiddleware(AuthMiddlewareStack(inner))

from django.urls import path

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

from yourapp.consumers import SocketCostumer
from yourapp.token_auth import TokenAuthMiddlewareStack

application = ProtocolTypeRouter({
    "websocket": TokenAuthMiddlewareStack(
        URLRouter([
            path("socket/", SocketCostumer),
        ]),
    ),

})

JWT_AUTH = {
    'JWT_AUTH_COOKIE': 'JWT',     # the cookie will also be sent on WebSocket connections
}

from channels.routing import ProtocolTypeRouter, URLRouter
from django.urls import path
from json_token_auth import JsonTokenAuthMiddlewareStack
from yourapp.consumers import SocketCostumer

application = ProtocolTypeRouter({
    "websocket": JsonTokenAuthMiddlewareStack(
        URLRouter([
            path("socket/", SocketCostumer),
        ]),
    ),

})

from http import cookies

from channels.auth import AuthMiddlewareStack
from django.contrib.auth.models import AnonymousUser
from django.db import close_old_connections
from rest_framework_jwt.authentication import BaseJSONWebTokenAuthentication


class JsonWebTokenAuthenticationFromScope(BaseJSONWebTokenAuthentication):
    """
    Extracts the JWT from a channel scope (instead of an http request)
    """

    def get_jwt_value(self, scope):
        try:
            cookie = next(x for x in scope['headers'] if x[0].decode('utf-8') == 'cookie')[1].decode('utf-8')
            return cookies.SimpleCookie(cookie)['JWT'].value
        except:
            return None


class JsonTokenAuthMiddleware(BaseJSONWebTokenAuthentication):
    """
    Token authorization middleware for Django Channels 2
    """

    def __init__(self, inner):
        self.inner = inner

    def __call__(self, scope):

        try:
            # Close old database connections to prevent usage of timed out connections
            close_old_connections()

            user, jwt_value = JsonWebTokenAuthenticationFromScope().authenticate(scope)
            scope['user'] = user
        except:
            scope['user'] = AnonymousUser()

        return self.inner(scope)


def JsonTokenAuthMiddlewareStack(inner):
    return JsonTokenAuthMiddleware(AuthMiddlewareStack(inner))