fairing example

fairing.rs

pub struct MyFairing {}

#[rocket::async_trait]
impl Fairing for MyFairing {
    fn info(&self) -> fairing::Info {
        fairing::Info {
            name: "MyFairing",
            kind: Kind::Request | Kind::Response,
        }
    }

    async fn on_request(&self, request: &mut Request<'_>, _: &mut rocket::Data<'_>) {
        println!("MyFairing: on_request");
    }

    async fn on_response<'r>(&self, request: &'r Request<'_>, response: &mut rocket::Response<'r>) {
        println!("MyFairing: on_response");

        response.set_header(Header::new("MyHeader", format!("MyContent")));
    }
}