daytime server in rust

daytime_server.rs

use chrono::Local;
use std::io::Write;
use std::net::{TcpListener, TcpStream};

fn handle_client(mut stream: TcpStream) {
    let dt = Local::now().to_utc();
    stream.write_all(dt.to_string().as_bytes()).unwrap();
    stream.shutdown(std::net::Shutdown::Both).unwrap();
}

fn main() -> std::io::Result<()> {
    let listener = TcpListener::bind("[::]:13")?;

    for stream in listener.incoming() {
        handle_client(stream?);
    }
    Ok(())
}