ghost-cloudflare-worker.js

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

async function handleRequest(event) {
  let response = await fetch(event.request);
  if (!response.ok) return response;
  let urls = ['/'];
  try {
    let json = await response.clone().json();
    urls = urls.concat(json.posts.map(post => post.url));
    event.waitUntil(Promise.allSettled(
      urls.map(url => caches.default.delete(`https://rreverser.com${url}`))
    ));
  } finally {
    return response;
  }
}