gistfile1.js

const TMDB_IMAGE_BASE_URL = 'https://image.tmdb.org/t/p/';

addEventListener("fetch", e => {
  const url = new URL(e.request.url);
  if (url.pathname === "/image") {
    e.respondWith((async () => {
      const width = url.searchParams.get("width");
      const path = url.searchParams.get("path");
      try {
        return await fetch(`${TMDB_IMAGE_BASE_URL}/w${width}${path}`, {mode: "no-cors"});
      } catch (e) {
        return Response.redirect("/nothing.svg");
      }
    })());
  }
});