Custom 404 response

[luhn]

Perhaps I'm missing something, but there doesn't seem to be a way of customizing the 404 page except for writing your own router.

To clarify, I understand that you can customize manually raised 404s by using middlewares. I'm talking about a 404 triggered when the router cannot resolve a URL to a handler.

[luhn]

I retract this issue; I'm completely wrong on this. You can indeed use middlewares. I don't why I thought you couldn't.

[luhn]

Although it could be good to document how to do this. Also, include simple middleware in aiohttp for handling this. Is this a contribution you'd be interested in?

[asvetlov]

Yes, I'm interesting in docs contributions written by users and describing their problems.
As library author a don't always understand weak places in documentation.

[lock]

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