Host a Quotion site in a subdirectory of your domain

export default {
  async fetch(request, env, ctx) {
    return proxyRequest(request);
  },
};
 
async function proxyRequest(request) {
  console.log(request.url);
  const originalUrl = new URL(request.url);
 
  // Redirect /blog/ to /blog
  if (originalUrl.pathname.endsWith('/') && originalUrl.pathname !== '/') {
    originalUrl.pathname = originalUrl.pathname.slice(0, -1);
    return Response.redirect(originalUrl.href, 301);
  }
 
  const host = originalUrl.host;
  try {
    // Use your quotion domain instead
    const blogHost = 'awesomeapplenotes.quotion.co';
    // Replace "blog" with your subdirectory name if needed
    const subdirectory = 'blog';
    const proxiedPaths = [subdirectory, '_next', '.quotion'];
    const url = new URL(request.url);
 
    if (
      proxiedPaths.some((path) => originalUrl.pathname.startsWith(`/${path}`))
    ) {
      // Rewrite host
      url.hostname = blogHost;
    }
    if (originalUrl.pathname.startsWith(`/${subdirectory}`)) {
      url.pathname = url.pathname.replace(`/${subdirectory}`, '');
    }
 
    const proxyRequest = new Request(url.href, request);
    proxyRequest.headers.set('X-Forwarded-Host', host);
    console.log(proxyRequest.url);
    return fetch(proxyRequest);
  } catch (e) {
    console.error('Proxy request failed', e);
    return fetch(request);
  }
}