actix-website/examples/url-dispatch/src/urls.rs

// <url>
use actix_web::{
    guard, http::header, http::Method, web, App, HttpRequest, HttpResponse, Result,
};

fn index(req: HttpRequest) -> Result<HttpResponse> {
    let url = req.url_for("foo", &["1", "2", "3"])?; // <- generate url for "foo" resource
    Ok(HttpResponse::Found()
        .header(header::LOCATION, url.as_str())
        .finish())
}

pub fn main() {
    App::new()
        .service(
            web::resource("/test/{a}/{b}/{c}")
                .name("foo") // <- set resource name, then it could be used in `url_for`
                .guard(guard::Get())
                .to(|| HttpResponse::Ok()),
        )
        .route("/test/", web::get().to(index));
}
// </url>