Scoping

Middlewares apply to all routes that were registered after them.

src/order1/blueprint.rs

use pavex::blueprint::router::GET;
use pavex::blueprint::Blueprint;
use pavex::f;

pub fn blueprint() -> Blueprint {
    let mut bp = Blueprint::new();
    bp.wrap(f!(crate::wrap1));
    bp.route(GET, "/", f!(super::handler));
    bp.wrap(f!(crate::wrap2));
    bp
}

The request handler for GET / has been registered before wrap2, so it is not affected by it.

Nesting

The same principle applies to nested Blueprints. Middlewares apply to all routes in nested Blueprints that were nested after the middleware.

src/order2/blueprint.rs

use pavex::blueprint::router::GET;
use pavex::blueprint::Blueprint;
use pavex::f;

pub fn blueprint() -> Blueprint {
    let mut bp = Blueprint::new();
    bp.wrap(f!(crate::wrap1));
    bp.nest(nested());
    bp.wrap(f!(crate::wrap2));
    bp
}

pub fn nested() -> Blueprint {
    let mut bp = Blueprint::new();
    bp.route(GET, "/", f!(super::handler));
    bp
}

The wrap2 middleware has been registered after the call to .nest, so it won't apply to the route registered against the nested Blueprint, GET /.