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

// <path>
use actix_web::{get, web, App, HttpServer, Result};

#[get("/{username}/{id}/index.html")] // <- define path parameters
async fn index(info: web::Path<(String, u32)>) -> Result<String> {
    let info = info.into_inner();
    Ok(format!("Welcome {}! id: {}", info.0, info.1))
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    HttpServer::new(|| App::new().service(index))
        .bind(("127.0.0.1", 8080))?
        .run()
        .await
}
// </path>