Feature/quart

[Ruwann]

Changes proposed in this pull request:

• Add support for Quart (https://gitlab.com/pgjones/quart)

[RobbeSneyders]

Looks great!

There's a lot of code duplication between the Flask & Quart implementation, so it might be good to make this code reusable.

Did you already run Connexion with a Quart backend? Would be great to add it as an example.

We probably also want to add tests for Quart, similar to the ones for AioHttp.

[RobbeSneyders]

There are a couple of methods in here that are identical to the FlaskApi. You might want to extract those into a super class, or subclass from the FlaskAPI.

If there are changes, it's often just a difference between using flask or quart, so you could make the framework a property of the class that you can override.

[RobbeSneyders]

This is also the case for the other classes in quart_api.py and quart_app.py.

[Ruwann]

I had a go at this but couldn't immediately get it to work, probably I'm trying to do it in the wrong way.

I added a new FlaskLikeApi class with a class atribute framework = None.
Then, FlaskApi inherits from FlaskLikeApi and the framework is set to flask, but this raised an error in the parent class because for example a method uses self.framework.json, giving an AttributeError.

[RobbeSneyders]

Hard to say without looking at the code. But we can continue like this for now and try to refactor once everything works.

[Ruwann]

I added an example for Quart as well, you can also specify server='uvicorn' in the QuartApp creation.

However, there seems to be an issue if aiohttp is not installed because it is imported in connexion.security.__init__.py, but it's not directly related to Quart itself.