TCP client in Rust

rust-client.rs

extern crate rand;

use std::io::prelude::*;
use std::thread;
use std::time::Duration;
use std::net::{TcpStream, Shutdown};
use rand::Rng;


fn thread_exec(id: u32){
    let mut stream: TcpStream = TcpStream::connect("127.0.0.1:7777").unwrap();
    let iterations = rand::thread_rng().gen_range(5, 15);

    let mut x = 0;
    while x < iterations {
        match stream.write(format!("Thread {}: {}\n", id, rand::thread_rng().gen_range(10000,100000)).as_bytes()){
           Ok(_)   => { stream.flush().unwrap(); }
           Err(e)  => { println!("Error! - {}", e); }
        }

        thread::sleep(Duration::from_millis(rand::thread_rng().gen_range(150, 2000)));

        x += 1;
    }


    stream.shutdown(Shutdown::Both).unwrap();
    println!("Client {} sent {} requests", id, iterations);   
}

fn main(){
    let threads = rand::thread_rng().gen_range(5, 25);
    let mut t = Vec::new();

    let mut x = 0;
    while x < threads {
        let y = x;
        t.push(
            thread::spawn(move || {
                thread_exec(y);
            })
        );

        x += 1;
    }

    for thr in t{ thr.join().unwrap(); }

    TcpStream::connect("127.0.0.1:7777").unwrap().write(String::from("quit\n").as_bytes()).unwrap();

    println!("Spawned {} clients", threads);
}