Consequences of using FlaskAsgiAdapter?

[Korijn]

I'm impressed with your repo, it's great for getting more insight on ASGI.

I saw the Flask ASGI Adapter (which completely blew my mind, just considering Flask could run websockets like that) and I'm wondering what the catch is? What parts of Flask won't work?

[jordaneremieff]

@Korijn Thanks! I'm happy it is helpful.

I haven't specifically tested to what extent any of the WSGI frameworks could be used with the adapter classes, but they are all very limited at present. The examples here generally present a wrapper around a simple application, making use of its routing methods and HTML rendering, and hack on a protocol router to allow routing websocket consumers alongside a converted WSGI->ASGI instance.

Any non-trivial integration of ASGI into Flask will require much more than what these adapters could provide. Fortunately, Flask intends to support ASGI for Python 3.7+, you can read more about the developments here: pallets/werkzeug#1322.

You may also want to take a look into Quart, which is an ASGI microframework that has the same API as Flask.