Read a message from a socket where the first byte represents the length of the message

use std::io::{TcpListener, TcpStream};

fn main() {
    let listener = TcpListener::bind("127.0.0.1:8000");
    let mut stream = listener.unwrap().accept().unwrap().0;
    let len = stream.read_byte().unwrap();
    stream.read_exact(len);
}