addEventListener('fetch', event => {
  event.respondWith(handleRequest(event.request));
});

async function handleRequest(request) {
  const url = new URL(request.url);
  const params = url.searchParams;

  // Get the 'srv' parameter from the URL query parameters
  const srvParam = params.get('srv');

  if (!srvParam) {
    // Redirect to a different URL when 'srv' parameter is missing
    return Response.redirect('https://example.com/error_page', 301);
  } else {
    // Define your list of links
    const linkList = [
      "linkhere/?blob="
    ];

    // Generate a random index to select a link from the list
    const randomIndex = Math.floor(Math.random() * linkList.length);
    const randomLink = linkList[randomIndex];

    // Redirect to the randomly selected link with the 'srv' parameter appended
    const redirectTo = `${randomLink}${srvParam}`;
    return Response.redirect(redirectTo, 301);
  }
}