Add request counter

[ahopkins]

Coming off the discussion re: the worker manager, I implemented the idea of adding a request counter. I thought of a few different strategies. Most important to me was that it not be forced upon users who do not opt in.

The obvious first choice was of course config. But, I do not want to even include a check for this on every request. I thought about using a touchup scheme, but we do not have one that is currently setup for general conditional checks. Maybe we should, but that is outside the scope here.

Doing it on Request.__init__ is the easiest. So, I thought perhaps as a subclass we can get the result without any of the consequences. It does however bring the question about whether a self-contained opinionated piece of logic belongs in the main project at all, or if it should be pushed over to Sanic Extensions.

Thoughts?

---

Implementation:

from sanic.request import CountedRequest

app = Sanic(..., request_class=CountedRequest)

@app.get("/")
async def handler(request: CountedRequest):
    return json({"count": request.count})

FYI - the result will show in the worker state

[ChihweiLHBird]

Looks good to me.

But test automation failed?

[ahopkins]

Looks good to me.

But test automation failed?

Yeah, have not checked. But I am 99% sure it is because we need to use the unreleased sanic-testing because of the changes to the workers in core.