IPFS Cloudflare worker proxy

ipfs_worker.js

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

async function handleRequest(request) {
  // Only GET requests work with this proxy.
  if (request.method !== 'GET')
    return new Response(`Method ${request.method} not allowed.`, {
      status: 405,
      headers: { Allow: 'GET' },
    });

  const url = new URL(request.url);
  const pathname = url.pathname.replace(/^\//, "")

  if (!pathname)
    return Response.redirect(UPLOAD_REDIRECT)

  if (pathname.startsWith("k5"))
    return fetch(`https://${IPFS_GATEWAY}/ipns/${pathname}`);

  if (pathname.startsWith("Qm") && pathname.length === 46)
    return fetch(`https://${IPFS_GATEWAY}/ipfs/${pathname}`);

  return new Response("Object not found", { status: 404 });
}