// This worker imports a script that returns 200 on the first request and a
// redirect on the second request. The resulting body also changes each time it
// is requested.
const params = new URLSearchParams(location.search);
const key = params.get('Key');
importScripts(`update-worker.py?Key=${key}&Mode=redirect&` +
              `Redirect=update-worker.py?Key=${key}%26Mode=normal`);