Error: Django can only handle ASGI/HTTP connections, not websocket.

my setup:

Django==3.0.3
channels==2.4.0
channels-redis==2.4.2
daphne==2.4.1

run command:

daphne myproduct.asgi:application

I got 500 server error when I connenct websocket .

log:

127.0.0.1:54023 - - [12/Mar/2020:16:51:21] "WSCONNECTING /ws/robot" - -
2020-03-12 16:51:22,104 ERROR    Exception inside application: Django can only handle ASGI/HTTP connections, not websocket.
  File "/Users/xx/project/xx/venv/lib/python3.7/site-packages/daphne/cli.py", line 30, in asgi
    await self.app(scope, receive, send)
  File "/Users/xx/project/xx/venv/lib/python3.7/site-packages/django/core/handlers/asgi.py", line 146, in __call__
    % scope['type']
  Django can only handle ASGI/HTTP connections, not websocket.
127.0.0.1:54023 - - [12/Mar/2020:16:51:22] "WSDISCONNECT /ws/robot" - -

[carltongibson]

Hi @jack-michaud. Yes. Currently this is the case. It’s a difference between ASGI v2 and v3.

Progress for this should be made in #1421 by @jaydenwindle. At that point we should be able to accept a single callable (the ASGI v3 version that Django’s new code implements) and the idea above should hold. 🤞

Goal now is a channels update to use ASGI 3 (allowing fallback for existing apps) throughout. I have stuff for the next version of DRF top of my list, and then it’s Channels after that. If you fancy lending a hand, that would be super.

[ribenz]

Hey everyone, when I change django.core.asgi.get_asgi_application to from channels.routing import get_default_application, it gives me this error: django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet. This is the full traceback:

Traceback (most recent call last):
  File "/home/admin/code/outpost/env/bin/daphne", line 8, in <module>
    sys.exit(CommandLineInterface.entrypoint())
  File "/home/admin/code/outpost/env/lib/python3.10/site-packages/daphne/cli.py", line 170, in entrypoint
    cls().run(sys.argv[1:])
  File "/home/admin/code/outpost/env/lib/python3.10/site-packages/daphne/cli.py", line 232, in run
    application = import_by_path(args.application)
  File "/home/admin/code/outpost/env/lib/python3.10/site-packages/daphne/utils.py", line 12, in import_by_path
    target = importlib.import_module(module_path)
  File "/home/admin/.python/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/home/admin/code/outpost/outpostsite/./outpostsite/asgi.py", line 22, in <module>
    application = get_default_application()
  File "/home/admin/code/outpost/env/lib/python3.10/site-packages/channels/routing.py", line 28, in get_default_application
    module = importlib.import_module(path)
  File "/home/admin/.python/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/home/admin/code/outpost/outpostsite/./outpostsite/routing.py", line 3, in <module>
    import backend.routing
  File "/home/admin/code/outpost/outpostsite/./outpostsite/apps/backend/routing.py", line 2, in <module>
    from backend.consumers import *
  File "/home/admin/code/outpost/outpostsite/./outpostsite/apps/backend/consumers.py", line 3, in <module>
    from backend.models import *
  File "/home/admin/code/outpost/outpostsite/./outpostsite/apps/backend/models.py", line 9, in <module>
    class modelname(Model):
  File "/home/admin/code/outpost/env/lib/python3.10/site-packages/django/db/models/base.py", line 108, in __new__
    app_config = apps.get_containing_app_config(module)
  File "/home/admin/code/outpost/env/lib/python3.10/site-packages/django/apps/registry.py", line 253, in get_containing_app_config
    self.check_apps_ready()
  File "/home/admin/code/outpost/env/lib/python3.10/site-packages/django/apps/registry.py", line 136, in check_apps_ready
    raise AppRegistryNotReady("Apps aren't loaded yet.")
django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet.