Cloudflare Worker - bulk regex 404s

cloudflare-bulk-404s.js

/**
 * Sets up routes and 404 any that match the 404 map
 * @param {Request} request
 */
async function handleRequest(request) {
  let requestURL = new URL(request.url)
  let path = requestURL.pathname
    if (should404(path)) {
      return new Response('Sorry, not found', {
        status: 404
      });
    }

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

const pathMap = [
    /^\/autodiscover\/autodiscover\.xml/,
    /^\/sites\/all\//,
    /^\/sites\/default\/files\/js/,
    /^\/sites\/default\/files\/css/,
    /^\/sites\/default\/files\/styles/,
    /^\/sites\/default\/files\/civimail/,
    /^\/sites\/default\/files\/.*\.png$/,
    /^\/sites\/default\/files\/.*\.jpg$/,
    /^\/sites\/default\/files\/.*\.gif$/,
]


function should404(path) {
    for (key in pathMap) {
        let r = new RegExp(pathMap[key]);
        if (r.test(path)) {
            return true;
        }
    }

    return false;
}