Rocket is one of the top web frameworks in Rust. We already made a Actix middleware (#92) but haven't got a Rocket one.

I think this demo (https://github.com/oiatz/Rocket_Casbin_Demo) is not enough. We will need a full-fledged rocket-authz middleware here: https://github.com/casbin-rs/rocket-authz

The Rocket community has urgent need for good authorization:

• Add auth support as contrib library rwf2/Rocket#8
• https://github.com/SergioBenitez/Rocket/search?q=auth&type=Issues