Geolocate the Location of an IP Address With Cloudflare Workers

cloudflare-worker.js

/**
Read more at:

https://abstractkitchen.com/blog/geolocation-with-cloudflare-workers/
*/

addEventListener("fetch", event => {
  const city = event.request.cf.city;
  const country = event.request.cf.country;
  const clientIP = event.request.headers.get("CF-Connecting-IP");

  const clientInfo = JSON.stringify({
    city: city,
    country: country,
    ip_addr: clientIP
  }, null, 2);

  const response = new Response(clientInfo, {
    headers: {
      "content-type": "application/json;charset=UTF-8"
    }
  });

  const responseHeaders = new Headers(response.headers);

  responseHeaders.set('Access-Control-Allow-Origin', '*');

  return event.respondWith(
    new Response(response.body, {
      headers: responseHeaders,
      status: response.status,
      statusText: response.statusText
    })
  );
});