Is it possible to attach a request guard onto all routes?

[tyu5]

I'm trying to block all access using Basic HTTP Authentication, but wish to avoid accidentally forgetting any routes.

I thought that perhaps it could be implemented through a Fairing, but I cannot see how that would work given that "Fairings cannot respond to an incoming request directly."

I saw that I can get an Outcome from a request guard with request.guard::<BasicAuthentication>().await, but I do not see how it could be used.

I also know that it's possible to block data by modifying the response in on_response with something like response.set_status(Status::Unauthorized) but this still generates a response, requires erasing its content and more generally, seems like it would cause unintended consequences.

I am using v0.5-rc.