Tokio Sock Custom Impl API

server.rs

//! Simple Low-level API to work with first.

//! Handlers have the type:
//! H: FnOnce(req: Request) -> impl Future<Output = Result<impl AsRef<[u8]>, impl ResponseError>>

//! Handlers are run in a separate task
 
let server = Server::new();

server.set(handlers::hello);

server.listen(([127, 0, 0, 1], 5050)).await?;

mod handlers {
    #[any("/r/*")] // Procedural macro // Destructures the path at compile-time
    async fn hello(req: &Request) -> Result<&'static str, HandlerError> {
        // Print requests bytes.
        println!(">>> request bytes =", req.as_bytes())
        
        // Response.
        Ok("Hello there!")
    }
}