django-channels：找不到路径的路径

Question

我有一个 Django + Vue.js 聊天应用程序，我正在尝试连接到 django-channels。

要访问任何聊天室，您只需访问：

http://localhost:8080/rooms/ "id"/

我的 javascript 连接如下所示：

connectToWebSocket () {
  const chatSocket = new WebSocket(
    `ws://localhost:8000/ws/rooms/${this.$route.params.id}/`
  )

  chatSocket.onopen = this.onOpen
  chatSocket.onclose = this.onClose
  chatSocket.onmessage = this.onMessage
  chatSocket.onerror = this.onError
},

我的消费者.py：

class ChatConsumer(WebsocketConsumer):
def connect(self):
    self.room_uri = self.scope['url_route']['kwargs']['uri']
    self.room_group_name = 'chat_%s' % self.room_uri

    # Join room group
    async_to_sync(self.channel_layer.group_add)(
        self.room_group_name,
        self.channel_name
    )

    self.accept()

def disconnect(self, close_code):
    # Leave room group
    async_to_sync(self.channel_layer.group_discard)(
        self.room_group_name,
        self.channel_name
    )

# Receive message from WebSocket
def receive(self, text_data):
    text_data_json = json.loads(text_data)
    message = text_data_json['message']
    user = text_data_json['user.username']

    # Send message to room group
    async_to_sync(self.channel_layer.group_send)(
        self.room_group_name,
        {
            'type': 'chat_message',
            'user': user,
            'message': message
        }
    )

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

    # Send message to WebSocket
    self.send(text_data=json.dumps({
        'user': user,
        'message': message
    }))

和我的routing.py：

from django.conf.urls import url

from core import consumers


websocket_urlpatterns = [
    url(r'^ws/rooms/<uri>/', consumers.ChatConsumer),
]

我的项目routing.py：

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

import core.routing


application = ProtocolTypeRouter({
    'websocket': AuthMiddlewareStack(
        URLRouter(
            core.routing.websocket_urlpatterns
        )
    )
})

问题是，我无法连接到 websocket，我的 django 服务器说：

[失败实例：回溯：：找不到路径“ws/rooms/759b9a8262ea4b7/”的路由。

我的代码有什么问题，我无法通过 websocket 连接到特定房间？

完整的堆栈跟踪：

[失败实例：回溯：：找不到路径“ws/rooms/759b9a8262ea4b7/”的路由。/home/dave/PycharmProjects/chatapp2/back/venv/lib/python3.6/site-packages/autobahn/websocket/protocol.py:2801:processHandshake /home/dave/PycharmProjects/chatapp2/back/venv/lib/python3 .6/site-packages/txaio/tx.py:429:as_future /home/dave/PycharmProjects/chatapp2/back/venv/lib/python3.6/site-packages/twisted/internet/defer.py:151:maybeDeferred /home/dave/PycharmProjects/chatapp2/back/venv/lib/python3.6/site-packages/daphne/ws_protocol.py:82:onConnect --- --- /home/dave/PycharmProjects/chatapp2/back/venv /lib/python3.6/site-packages/twisted/internet/defer.py:151:maybeDeferred /home/dave/PycharmProjects/chatapp2/back/venv/lib/python3.6/site-packages/daphne/server.py :198:调用 /home/dave/PycharmProjects/chatapp2/back/venv/lib/python3.6/site-packages/channels/routing.py:58:调用 /home/dave/PycharmProjects/chatapp2/back/venv/lib/python3. 6/site-packages/channels/sessions.py:43：调用 /home/dave/PycharmProjects/chatapp2/back/venv/lib/python3.6/site-packages/channels/sessions.py:141：调用 /home/ dave/PycharmProjects/chatapp2/back/venv/lib/python3.6/site-packages/channels/sessions.py:165: init /home/dave/PycharmProjects/chatapp2/back/venv/lib/python3.6/site-包/频道/中间件 .py: 31：调用/home/dave/PycharmProjects/chatapp2/back/venv/lib/python3.6/site-packages/channels/routing.py:154：调用

Answer 1

您需要使用url，我遇到了同样的问题：

不工作

websocket_urlpatterns = [
  path('ws/chat/<str:room_name>/$', consumers.ChatConsumer),
]

在职的

websocket_urlpatterns = [
   url(r'^ws/chat/(?P<room_name>[^/]+)/$', consumers.ChatConsumer),
]

Answer 2

尝试这样的事情：

routing.py（在 django 应用程序文件夹内）

from django.urls import path
from core import consumers

websocket_urlpatterns = [
    path('ws/rooms/<uri>/', consumers.ChatConsumer),
]

Routing.py（与您的settings.py同一级别）

from channels.auth import AuthMiddlewareStack
from channels.routing import ProtocolTypeRouter, URLRouter
import myapp.routing

application = ProtocolTypeRouter({
    # (http->django views is added by default)
    'websocket': AuthMiddlewareStack(
        URLRouter(
            myapp.routing.websocket_urlpatterns
        )
    ),
})

最后在你的settings.py中

CHANNEL_LAYERS = {
    'default': {
        'BACKEND': 'channels_redis.core.RedisChannelLayer',
        'CONFIG': {
            "hosts": [REDIS_URL],
        },
    },
}

INSTALLED_APPS.append('channels')
ASGI_APPLICATION = 'myapp.routing.application'

Answer 3

我遇到了和你一样的问题，刚刚我刚好解决了！在我的 ws_client.py 我写了这个

ws.create_connection("ws://127.0.0.1:8000/alarm")

在routing.py中我改为下面这个并且它起作用了

from django.urls import path
channel_routing = [
    path('alarm',consumers.ws_message),
    # before I wrote 'alarm/', I just change from alarm/ to alarm
]

它奏效了！你可以试试看