Dumb "Hello World" TCP server in Rust. Updated for Rust 0.6

gistfile1.rs

extern mod std;
use std::net;
use std::uv;

type ErrChan = comm::SharedChan<Option<net::tcp::TcpErrData>>;

fn on_ready(_kill_ch: ErrChan) {
    io::println("listener is ready");
}

fn on_connect(c: net::tcp::TcpNewConnection, kill_ch: ErrChan) {
    do task::spawn() {
        let res = net::tcp::accept(c);
        if !res.is_err() {
            let sck = result::unwrap(res);
            let s = ~"Hello World\r\n";
            sck.write(str::to_bytes(s));
        } else {
            kill_ch.send(Some(res.unwrap_err()));
        }
    }
}

fn main() {
    let ip = net::ip::v4::parse_addr("127.0.0.1");
    let iotask = &uv::global_loop::get();
    net::tcp::listen(ip, 9123, 128, iotask, on_ready, on_connect);
}