pub fn main(
    receiver: mpsc::Receiver<PositionMessage>,
    sender: mpsc::Sender<Input>
) {
  let receiver = Arc::new(Mutex::new(receiver));

  listen("0.0.0.0:8081", |out| {
    let receiver = receiver.clone();
    let out_clone = out.clone();

    thread::spawn(move || {
      loop {
        let message = receiver.lock().unwrap().recv().unwrap();
        out_clone.send(json::to_string(&message).unwrap()).unwrap();
      }
    });

    Server { out: out }
  }).unwrap()
}