You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: server.rs
    path of file: ./repos/coap-rs/examples
    
    the code of the file until where you have to start completion: extern crate coap;

use std::net::SocketAddr;

use coap::Server;
use coap_lite::CoapRequest;
use coap_lite::RequestType as Method;
use tokio::runtime::Runtime;

fn main() {
    let addr = "127.0.0.1:5683";

    Runtime::new().unwrap().block_on(async move {
        let server = Server::new_udp(addr).unwrap();
        println!("Server up on {}", addr);

        server
            .run(|mut request: Box<CoapRequest<SocketAddr>>| async move {
                match request.get_method() {
                    &Method::Get => println!("request by get {}", request.get_path()),
                    &Method::Post => pr
    
fn main() {
    let addr = "127.0.0.1:5683";

    Runtime::new().unwrap().block_on(async move {
        let server = Server::new_udp(addr).unwrap();
        println!("Server up on {}", addr);

        server
            .run(|mut request: Box<CoapRequest<SocketAddr>>| async move {
                match request.get_method() {
                    &Method::Get => println!("request by get {}", request.get_path()),
                    &Method::Post => println!(
                        "request by post {}",
                        String::from_utf8(request.message.payload.clone()).unwrap()
                    ),
                    &Method::Put => println!(
                        "request by put {}",
                        String::from_utf8(request.message.payload.clone()).unwrap()
                    ),
                    _ => println!("request by other method"),
                };

                match request.response {
                    Some(ref mut message) => {
                        message.message.payload = b"OK".to_vec();
                    }
                    _ => {}
                };
                return request;
            })
            .await
            .unwrap();
    });
}