use hyper::{Body, Request, Response, Server}; // Import the routerify prelude traits. use routerify::prelude::*; use routerify::{Router, RouterService}; use std::io; use std::net::SocketAddr; // A handler for "/" page. async fn home_handler(_: Request) -> Result, io::Error> { Ok(Response::new(Body::from("Home page"))) } // Define a different module which will have only API related handlers. mod api { use super::*; // Define a handler for "/users/:userName/books/:bookName" API endpoint which will have two // route parameters: `userName` and `bookName`. async fn user_book_handler(req: Request) -> Result, io::Error> { let user_name = req.param("userName").unwrap(); let book_name = req.param("bookName").unwrap(); Ok(Response::new(Body::from(format!( "User: {}, Book: {}", user_name, book_name )))) } pub fn router() -> Router { // Create a router for API and specify the the handlers. Router::builder() .get("/users/:userName/books/:bookName", user_book_handler) .build() .unwrap() } } fn router() -> Router { // Create a root router and specify the the handlers. Router::builder() .get("/", home_handler) // Mount the api router at `/api` path. // Now the app can handle: `/api/users/:userName/books/:bookName` path. .scope("/api", api::router()) .build() .unwrap() } #[tokio::main] async fn main() { let router = router(); // Create a Service from the router above to handle incoming requests. let service = RouterService::new(router).unwrap(); // The address on which the server will be listening. let addr = SocketAddr::from(([127, 0, 0, 1], 3001)); // Create a server by passing the created service to `.serve` method. let server = Server::bind(&addr).serve(service); println!("App is running on: {}", addr); if let Err(err) = server.await { eprintln!("Server error: {}", err); } }