cloudflare-photos-proxy.js

addEventListener("fetch", (event) => {
  event.respondWith(
    handleRequest(event.request).catch(
      (err) => new Response(err.stack, { status: 500 })
    )
  );
});

async function handleRequest(request) {
  const { pathname, searchParams, host } = new URL(request.url);

  const url = new URL(request.url)
  url.hostname = "photos.example.com"

  const newRequest = new Request(
    url.toString(),
    request
  )

  let response = await fetch(newRequest,
  {
    cf: {
      // Always cache this fetch regardless of content type
      cacheTtlByStatus: { "200-299": 16070400, 404: 1, "500-599": 0 }
    },
  });

  response = new Response(response.body, response)

  // Set cache control headers to cache on browser for 25 minutes  
  response.headers.set("Cache-Control", "public, max-age=16070400")
  
  return response
}