CloudFlare worker for loading image from remote bucket and serving the contents (to avoid a redirect)

worker.js

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

const domains = {
  'dustin.pics': 'https://cdn.dstn.to/i',
  'files.dstn.to': 'https://cdn.dstn.to/u',
  'snaps.dstn.to': 'https://cdn.dstn.to/snaps',
  'mods.dstn.to': 'https://solder-cdn.dustin.sh/mods',
  'mirror.dstn.to': 'https://solder-cdn.dustin.sh',
  'cdn.wumpus.club': 'https://wumpcdn.dstn.to'
};

const not_found = 'https://dstn.to/404';

async function handleRequest(request) {
  const url = new URL(request.url);
  const host = domains[url.hostname] || domains['dustin.pics'];
  const ip = request.headers.get('cf-connecting-ip');
  const asset = await fetch(`${host}${url.pathname}`, request);
  if (asset.status !== 200) return Response.redirect('https://dstn.to/404');

  return new Response(asset.body, asset);
}