Is there a standard way to convert an ASGI application to WSGI?

[knowsuchagency]

In the same way asgiref.wsgi.WsgiToAsgi converts a WSGI application to ASGI, is there a standard way to convert an ASGI application to WSGI?

My use case is that I want to leverage FastAPI to create my REST api, but I'm working on a legacy flask application. If I can convert my ASGI app to WSGI, I can easily mount it on the legacy application using werkzeug.middleware.dispatcher.DispatcherMiddleware.

[andrewgodwin]

There's no standard implementation yet but it's definitely possible, if not very efficient (as you'll need to consume one thread per request). I'd happily take one to sit alongside the other adapter, but I'm not personally planning to work on it.

[knowsuchagency]

Thanks @andrewgodwin -- maybe I'll hack on it a bit and submit a PR

[adriangb]

I think this could be useful in tests, where performance doesn't really matter but being able to swap out a WSGI app for an ASGI app while minimizing the LOC rewritten would be clutch.