Adding support for route based middleware

[protibimbok]

In other frameworks (i.e. Laravel, Express) there is an way of adding middleware to a route easily which has access to the request object and is able to send response. When I tried this (FastApi -> Starlette) it was missing. These middlewares do make the job a lot easier and in some cases I think it's essential to have.
So I've tried to implement this feature.

The route middlewares behaves more like an endpoint than a middleware.
These middlewares receive two parameters request: Request and next: async function

async def check_admin(request: Request, next):
    if request.headers['Authorization'] == 'I am admin':
        request.isAdmin = True
        request.perms = ['a', 'b', 'c']
        return await next()
    else:
        return JSONResponse(['error':'Unauthorized access'])


async def check_perm(request: Request, next):
    if request.isAdmin and 'c' in request.perms:
        return await next()
    else:
        return JSONResponse(['error':'Unauthorized access'])



routes = [
    Route("/admin", endpoint = admin_page, middlewares = check_admin),
    Route(
        "/admin/secret", endpoint = admin_secret,
        middlewares = [check_admin, check_perm] # Middlewares will be ran in the same order
    )
]

How's the idea? And can someone help me to run the tests?

[adriangb]

Please take a look at #1649

[protibimbok]

This is a complete different approach. Sorry previously my code was not formatted. This is pretty close to Express & Laravel and can manipulate the request object.

[Kludex]

If you follow the link on the PR description, and do the same on the following... You'll find out what you want...

[protibimbok]

@Kludex Sorry I could not understand. Did you mean this is already implemented?

[Kludex]

No, I mean that you didn't follow the links. There's a history behind the PR Adrian sent.

See #1286

[protibimbok]

Thank you. I have read these history. That does work for me, but can you please take a look at this Pull Request? It's a different approach and I think it's much cleaner...

[protibimbok]

Test fails for trio when ran together, but succeeds when ran separately!