Django Channels - Websocket 连接失败

问题描述 投票：0回答：3

我目前正在尝试设置我的 Django Channels 聊天应用程序，并且我已经尽我所能地遵循了文档 - 显然，当出现问题时，总有解决方案，但我只是很难确定我在哪里让这个工作出错了。

到目前为止，我已经安装了 Django Channels，在 settings.py 中正确配置了我的channel_layer，我已经参考了文档和其他在线教程来创建我的 Consumer.py 文件、utils.py、views.py 和 chat.html 模板文件。

我还配置了 nginx、gunicorn、daphne 和 redis，我可以确认所有这些服务都在运行。我已安装 LetsEncrypt 并已允许 SSL 端口（https 连接为 443）。

我目前正在实时生产服务器上访问我的 Django 网站，如下所示：https://mydomain:8001，并且我的聊天的直接链接配置为 https://mydomain:8001/messenger

（我已允许端口 8001 通过我的防火墙）

以下是我从聊天页面收到的状态消息：

SUCCESS {response: "Successfully got the chat.", chatroom_id: 1}chatroom_id: 1response: "Successfully got the chat."__proto__: Object
(index):303 setupWebSocket: 1
(index):371 ChatSocket connecting..
WebSocket connection to 'wss://www.<mydomain>.com:8001/messenger/1/' failed: 
setupWebSocket @ (index):317
success @ (index):389
c @ jquery.min.js
fireWith @ jquery.min.js
l @ jquery.min.js
(anonymous) @ jquery.min.js
ChatSocket error Event {isTrusted: true, type: "error", target: WebSocket, currentTarget: WebSocket, eventPhase: 2, …}bubbles: falsecancelBubble: falsecancelable: falsecomposed: falsecurrentTarget: WebSocket {url: "wss://<mydomain>:8001/messenger/1/", readyState: 3, bufferedAmount: 0, onopen: null, onOpen: ƒ, …}defaultPrevented: falseeventPhase: 0isTrusted: truepath: []returnValue: truesrcElement: WebSocket {url: "wss://<mydomain>:8001/messenger/1/", readyState: 3, bufferedAmount: 0, onopen: null, onOpen: ƒ, …}target: WebSocket {url: "wss://<mydomain>:8001/messenger/1/", readyState: 3, bufferedAmount: 0, onopen: null, onOpen: ƒ, …}timeStamp: 43973.62500001327type: "error"__proto__: Event
(index):357 Chat socket closed.

任何解决此问题的帮助将不胜感激。如果您可以建议您应该查看哪些文件，我将很乐意使用我的聊天应用程序所需的任何文件的内容来更新我的问题。 :-)

谢谢！

文件内容：

nginx.conf

server {
    listen 80;
    server_name myapp mydomain.com www.mydomain.com;

    location = /favicon.ico { access_log off; log_not_found off; }
    location /static/ {
        root /home/myapp;
    }

    location / {
        proxy_set_header Host $http_host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_pass http://unix:/home/myapp/myapp.sock;
    }
    
    location /ws/ {
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_redirect off;
        proxy_pass https://127.0.0.1:8001;
    }
    
    location /wss/ {
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-for $proxy_add_x_forwarded_for;
                proxy_set_header Host $http_host;
                proxy_pass http://127.0.0.1:8001;
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "upgrade";
        }
}

路由.py

from channels.auth import AuthMiddlewareStack
from channels.routing import ProtocolTypeRouter, URLRouter
from channels.security.websocket import AllowedHostsOriginValidator
from django.urls import path, re_path

from messenger.consumers import ChatConsumer


application = ProtocolTypeRouter({
    'websocket': AllowedHostsOriginValidator(
        AuthMiddlewareStack(
            URLRouter([
                
                    path('messenger/<room_id>/', ChatConsumer),
                    
            ])
        )
    ),
})

设置.py

CHANNEL_LAYERS = {
    'default': {
        'BACKEND': 'channels_redis.core.RedisChannelLayer',
        'CONFIG': {
            "hosts": [('127.0.0.1', 6379)],
        },
    },
}

我在控制台中收到错误：

(index):317 WebSocket connection to 'wss://www.mydomain.com:8001/messenger/1/' failed:

（上面写着 mydomain.com，我的实际域名就在那里输入：）

来自 

journalctl

的最新达芙妮原木 
Jun 21 14:22:56 myhostname.com python3[36088]: 2021-06-21 14:22:56,576 INFO     Starting server at ssl:8001:privateKey=/etc/letsencrypt/live/mydomain.com/privkey.pem:certKey=/etc/let>
Jun 21 14:22:56 myhostname.com python3[36088]: 2021-06-21 14:22:56,576 INFO     HTTP/2 support not enabled (install the http2 and tls Twisted extras)
Jun 21 14:22:56 myhostname.com python3[36088]: 2021-06-21 14:22:56,577 INFO     Configuring endpoint ssl:8001:privateKey=/etc/letsencrypt/live/mydomain.com/privkey.pem:certKey=/etc/l>
Jun 21 14:22:56 myhostname.com python3[36088]: 2021-06-21 14:22:56,584 INFO     Listening on TCP address 0.0.0.0:8001

达芙妮日志中的错误

Jun 21 14:38:51 myhostname.com python3[36088]: Traceback (most myhostname.com python3[36088]:   File "/usr/local/lib/python3.6/site-packages/channels/routing.py", line 71, in __call__
Jun 21 14:38:51 myhostname.com python3[36088]:     return await application(scope, receive, send)
Jun 21 14:38:51 myhostname.com python3[36088]:   File "/usr/local/lib/python3.6/site-packages/channels/security/websocket.py", line 37, in __call__
Jun 21 14:38:51 myhostname.com python3[36088]:     return await self.application(scope, send, receive)
Jun 21 14:38:51 myhostname.com python3[36088]:   File "/usr/local/lib/python3.6/site-packages/channels/sessions.py", line 47, in __call__
Jun 21 14:38:51 myhostname.com python3[36088]:     return await self.inner(dict(scope, cookies=cookies), receive, send)
Jun 21 14:38:51 myhostname.com python3[36088]:   File "/usr/local/lib/python3.6/site-packages/channels/sessions.py", line 254, in __call__
Jun 21 14:38:51 myhostname.com python3[36088]:     return await self.inner(wrapper.scope, receive, wrapper.send)
Jun 21 14:38:51 myhostname.com python3[36088]:   File "/usr/local/lib/python3.6/site-packages/channels/auth.py", line 181, in __call__
Jun 21 14:38:51 myhostname.com python3[36088]:     return await super().__call__(scope, receive, send)
Jun 21 14:38:51 myhostname.com python3[36088]:   File "/usr/local/lib/python3.6/site-packages/channels/middleware.py", line 26, in __call__
Jun 21 14:38:51 myhostname.com python3[36088]:     return await self.inner(scope, receive, send)
Jun 21 14:38:51 myhostname.com python3[36088]:   File "/usr/local/lib/python3.6/site-packages/channels/routing.py", line 160, in __call__
Jun 21 14:38:51 myhostname.com python3[36088]:     send,
Jun 21 14:38:51 myhostname.com python3[36088]:   File "/usr/local/lib/python3.6/site-packages/asgiref/compatibility.py", line 33, in new_application
Jun 21 14:38:51 myhostname.com python3[36088]:     instance = application(scope)
Jun 21 14:38:51 myhostname.com python3[36088]:   File "/usr/local/lib/python3.6/site-packages/channels/generic/websocket.py", line 159, in __init__
Jun 21 14:38:51 myhostname.com python3[36088]:     super().__init__(*args, **kwargs)
Jun 21 14:38:51 myhostname.com python3[36088]: TypeError: object.__init__() takes no parameters
python django websocket django-channels
3个回答
8
投票

我认为问题出在配置上。在nginx中，你必须指定URL前缀，而不是协议，也不需要同时添加

ws
和
wss
。 nginx 配置必须与此类似

location /ws/ {
    proxy_set_header Host               $http_host;
    proxy_set_header X-Real-IP          $remote_addr;
    proxy_set_header X-Forwarded-For    $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Host   $server_name;
    proxy_set_header X-Forwarded-Proto  $scheme;
    proxy_set_header X-Url-Scheme       $scheme;
    proxy_redirect off;

    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection $connection_upgrade;

    proxy_pass http://127.0.0.1:8001;
}

因此，要通过 Websocket 协议进行连接，您必须访问 

wss://www.<mydomain>.com:8001/ws/
下的某些内容。为此，您的 asgi 路由还必须包含 
ws
前缀。另外，您应该对消费者使用 
as_asgi()
。 （https://channels.readthedocs.io/en/stable/topics/routing.html）

application = ProtocolTypeRouter({
    'websocket': AllowedHostsOriginValidator(
        AuthMiddlewareStack(
            URLRouter([
                    path('ws/messenger/<room_id>/', ChatConsumer.as_asgi()), 
            ])
        )
    ),
})

现在您应该能够连接到 

wss://www.<mydomain>.com:8001/ws/messenger/1/
（不要忘记 ws！）。

0
投票

终于让 Django Channels 工作了（终于成功让我的 Websocket 连接工作了） - 非常感谢 Alexandr 的帮助。

从日志中，我发现以下错误： 

ERROR: TypeError: object.__init__() takes exactly one argument (the instance to initialize)

我忘记将 

as_asgi()
添加到我调用 ChatConsumer 的末尾。所以我改变了我的路由路径：

path('ws/messenger/<room_id>/', ChatConsumer),

致

path('ws/messenger/<room_id>/', ChatConsumer.as_asgi()),

我的Websocket现已打开并已成功连接！快乐的日子！

再次感谢亚历山大的所有帮助！

0
投票
    proxy_pass http://localhost:10001;
    proxy_set_header Host $host;
    # WebSocket support
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    # ...other WebSocket settings
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