gistfile1.rs

let len;
loop {
  match socket.read(&mut buf) {
    Ok(readlen) => { len = readlen; break; },
    Err(IoError { kind: TimedOut, .. }) => (), // busywait
    Err(e) => panic!("Failed reading from socket: {}", e)
  }
}

// len now contains the number of valid bytes in buf