Support hypercorn and Trio?

[nazarewk]

I would like to use NiceGUI with Trio instead of asyncio. This means implementing hypercorn in addition to uvicorn, because the latter does not plan to support Trio

[falkoschindler]

Interesting. I can well imagine to add a hypercorn argument to ui.run that starts a hypercorn server instead of uvicorn. That's something we should look into after completing v1.0.

[burnpanck]

Has this been tried by someone? I had the luxury of being able to work exclusively with trio in the past, and got accustomed to expect clear and understandable behaviour. When I had a library like the MongoDB async driver, I was still able to work around with trio_asyncio, but got accustomed to silent swallowing of exceptions, behaviour after leaving a scope and things like that. Now, I'm a happy user of nicegui and since my libraries are all written in anyio, I decided to just run everything under asyncio, hoping to avoid some of the trio_asyncio hassles. However, now that I have an application combining three asyncio-native libaries (nicegui via uvicorn, MongoDB driver, and bleak), asyncio really showed it's teeth. I have completely unpredictable behaviour, probably some silent failure and I wish I had a trio loop. I'd be willing to do some legwork here if there is hope that this succeeds...

[rodja]

@burnpanck thanks for your willingness to contribute. From the FastAPI docs:

Starlette (and FastAPI) are based on AnyIO, which makes it compatible with both Python's standard library asyncio and Trio.

So a good first task would be a pull request which ensures that NiceGUI also uses AnyIO.