Is there a way to combine Flask-SocketIO with uWSGI without monkey patching?

[LostInDarkMath]

Hi there,
I try to use uWSGI together with Flask-SocketIO. The docs say that I need to use gevent in order to use the native websockets with uWSGI. And for that I need to use gevent.monkey.patch_all().

My problem is that this does not work with async endpoints:

2023-03-03 15:30:04.912: ERROR    Exception on /api/workspaces [GET]
Traceback (most recent call last):
  File "/opt/maddox/.venv/lib/python3.11/site-packages/flask/app.py", line 2528, in wsgi_app
    response = self.full_dispatch_request()
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/maddox/.venv/lib/python3.11/site-packages/flask/app.py", line 1825, in full_dispatch_request
    rv = self.handle_user_exception(e)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/maddox/.venv/lib/python3.11/site-packages/flask/app.py", line 1823, in full_dispatch_request
    rv = self.dispatch_request()
         ^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/maddox/.venv/lib/python3.11/site-packages/flask/app.py", line 1799, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/maddox/.venv/lib/python3.11/site-packages/asgiref/sync.py", line 177, in __call__
    raise RuntimeError(
RuntimeError: You cannot use AsyncToSync in the same thread as an async event loop - just await the async function directly.

So my question is: Is there a way to avoid monkey-patching? Or do you have an idea how I can fix this?

[miguelgrinberg]

What you are doing is mixing several concurrency styles in one application and that is a recipe for trouble. I suggest that you go with a single type of concurrency and then choose your dependencies based on your selection. Flask-SocketIO does not work with asyncio, but you can use the python-socketio package (a dependency) in asynchronous applications. Of course it goes without say that if you do choose that route you will also have to drop Flask, which is also not fully supportive of asynchronous applications.