Python Django中的Websocket握手错误。

Question

我在WebSocket连接时遇到了问题，因为它由于握手错误而被关闭。错误消息如下：

WebSocket HANDSHAKING /ws/polData/ [127.0.0.1:59304]
Exception inside application: object.__init__() takes exactly one argument (the instance to initialize)
Traceback (most recent call last):
  File "/usr/lib/python3.7/site-packages/channels/routing.py", line 71, in __call__
    return await application(scope, receive, send)
  File "/usr/lib/python3.7/site-packages/channels/sessions.py", line 47, in __call__
    return await self.inner(dict(scope, cookies=cookies), receive, send)
  File "/usr/lib/python3.7/site-packages/channels/sessions.py", line 172, in __call__
    return await self.inner(self.scope, receive, self.send)
  File "/usr/lib/python3.7/site-packages/channels/auth.py", line 181, in __call__
    return await super().__call__(scope, receive, send)
  File "/usr/lib/python3.7/site-packages/channels/middleware.py", line 26, in __call__
    return await self.inner(scope, receive, send)
  File "/usr/lib/python3.7/site-packages/channels/routing.py", line 160, in __call__
    send,
  File "/usr/local/lib/python3.7/dist-packages/asgiref/compatibility.py", line 33, in new_application
    instance = application(scope)
  File "/usr/lib/python3.7/site-packages/channels/generic/websocket.py", line 159, in __init__
    super().__init__(*args, **kwargs)
TypeError: object.__init__() takes exactly one argument (the instance to initialize)
WebSocket DISCONNECT /ws/polData/ [127.0.0.1:59304]\

- Sumedh Kharode

Answer 1

请检查应用中的routing.py文件,

在websocket_urlpatterns下的repath上，可能错过了.as_asgi()。

例如：

websocket_urlpatterns = [

    re_path(r'ws/chat/(?P<room_name>\w+)/$', consumers.ChatConsumer.as_asgi()),
]

- Shaheen Hyder

---

你好@Shaheen - 你在Django/channels领域可以提供自由咨询服务吗？我们公司位于新加坡，正在寻找印度的Django开发人员。 - oktested

Answer 2

在routing.py中，对于Python 3.6以上的版本，需要使用"as_asgi()"。

以下是我解决问题并保持兼容不同版本的方法。

if float(platform.python_version()[0:3]) > 3.6:
    cons = consumers.myConsumer.as_asgi()
else:
    cons = consumers.myConsumer

websocket_urlpatterns = [
    path("ws/example/", cons),
]

- wbx1697

Answer 3

websocket_urlpatterns = [
    path("ws/example/", cons.as_asgi()),
]

- Pankaj Palariya

---

如果你解释一下这段代码在做什么，那么这个回答会更有帮助。 - micpap25