Cloudflare Worker Proxy

worker.js

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

async function handleRequest(request) {
  const url = new URL(request.url);
  const { pathname, search } = url;
  var newPathname = pathname;
  if (pathname.startsWith('/docs')) {
    newPathname = pathname.replace('/docs', '');
  }
  const originUrl = `https://docs.boltai.com${newPathname}${search}`;
  console.log('originUrl', originUrl);
  const fetchOptions = {
    method: request.method,
    headers: request.headers,
    redirect: 'follow', // Ensure redirects are followed
  };
  const response = await fetch(originUrl, fetchOptions);

  // Check if the response is HTML
  const contentType = response.headers.get('content-type');
  if (contentType && (contentType.includes('text/html') || (contentType.includes('text/css')))) {
    // Get the response text
    let text = await response.text();

    // Replace the script sources
    text = text.replace(
      /\/_next\/static/g,
      'https://boltai.com/docs/_next/static'
    );

    // Replace the canonical link
    text = text.replace(
      /<link rel="canonical" href="https:\/\/docs\.boltai\.com\/docs/g,
      '<link rel="canonical" href="https://boltai.com/docs'
    );

    // Create a new response with the modified HTML
    const newResponse = new Response(text, {
      status: response.status,
      statusText: response.statusText,
      headers: response.headers,
    });

    return newResponse;
  }

  // If not HTML, return the original response
  return response;
}