Cloudflare purge cache worker

worker.js

// Based on https://gist.github.com/vdbelt/20f116236d2ebffa92f131e679c0551a

addEventListener('fetch', event => {
    event.respondWith(purgeCache(event.request))
})

async function purgeCache(request) {

    // get zone querystring value
    const zone = new URL(request.url).searchParams.get('zone');

    // test if is valid zone id
    if (!/^([a-z0-9]{32})$/.test(zone)) return new Response('Invalid Zone ID', { status: 500 });

    // build url to target zone
    const url = `https://api.cloudflare.com/client/v4/zones/${zone}/purge_cache`;
  
    // fire the request
    return await fetch(url, {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
            'X-Auth-Email': '', // cloudflare account email address
            'X-Auth-Key': '' // my-profile -> api tokens -> global api key
        },
        body: JSON.stringify({
            'purge_everything': true
        })
    });
}