Cloudflare Worker to use domain as a proxy to another domain

cf_proxy_worker.js

export default {
  async fetch(request, env, ctx) {
    let url = new URL(request.url);
    url.hostname = url.hostname.replace(/\.?src\.com$/, '.dest.com');

    let newHeaders = new Headers(request.headers);
    newHeaders.set('Host', url.hostname);

    let newRequest = new Request(url.toString(), {
      method: request.method,
      headers: newHeaders,
      body: request.body,
      redirect: 'manual',
      cf: request.cf,
    });

    let response = await fetch(newRequest);

    // Clone the response to modify headers if needed
    let modifiedResponse = new Response(response.body, response);

    // Example: Modify the 'Location' header in redirects
    if (response.status >= 300 && response.status < 400 && response.headers.has('Location')) {
      let location = response.headers.get('Location');
      location = location.replace(/\.?src\.com$/, '.dest.com');
      modifiedResponse.headers.set('Location', location);
    }

    return modifiedResponse;
  },
};