Or at least the call to your origin

async function handleRequest(request) {

  // url rewriting
  let url = request.url;
  let host = request.headers.get("Host");
  let path = new URL(request.url).pathname; 

  // redirect www.
  if (url.startsWith("https://www.")) {
    return Response.redirect(url.replace("https://www.", "https://"));
  }



  // if we are api
  let isApiOrigin = (path.startsWith("/api/") || path == "/api");
  if (isApiOrigin) {
    url = url.replace(`https://${host}/api`, `https://api.${host}`);
  } else {

    // throw out query params for static pages
    url = url.split("?")[0];
    url = url.replace("https://","https://storage.googleapis.com/");

  
      // if path does not contain an extension (eg /dashboard but not /script.js)
      // or is explicitly a directory (eg /dashboard/) add the index.html
      if (path.endsWith("/")) {
        url = url.concat("index.html");
      } else if (!path.split("/").pop().includes(".")) {
        return Response.redirect(`https://${host}${path}/`, 308);
      };


  }

  const response = await fetch(new Request(url,
    {
      body:request.body,
      method:request.method,
      headers:request.headers,
      redirect:request.redirect,
    }
  ));

async function handleRequest(request) {

  // url rewriting
  let url = request.url;
  let host = request.headers.get("Host");
  let path = new URL(request.url).pathname; 

  // redirect www.
  if (url.startsWith("https://www.")) {
    return Response.redirect(url.replace("https://www.", "https://"));
  }



  // if we are api
  let isApiOrigin = (path.startsWith("/api/") || path == "/api");
  if (isApiOrigin) {
    url = url.replace(`https://${host}/api`, `https://api.${host}`);
  } else {

    // throw out query params for static pages
    url = url.split("?")[0];
    url = url.replace("https://","https://storage.googleapis.com/");

  
      // if path does not contain an extension (eg /dashboard but not /script.js)
      // or is explicitly a directory (eg /dashboard/) add the index.html
      if (path.endsWith("/")) {
        url = url.concat("index.html");
      } else if (!path.split("/").pop().includes(".")) {
        return Response.redirect(`https://${host}${path}/`, 308);
      };


  }

  const response = await fetch(new Request(url,
    {
      body:request.body,
      method:request.method,
      headers:request.headers,
      redirect:request.redirect,
    }
  ));

const start = Date.now();
let response = await fetch(new Request(url,
  {
    body:request.body,
    method:request.method,
    headers:request.headers,
    redirect:request.redirect,
  }
));
response = new Response(response.body, response);
response.headers.set("x-elapsed", Date.now() - start);

const start = Date.now();
let response = await fetch(new Request(url,
  {
    body:request.body,
    method:request.method,
    headers:request.headers,
    redirect:request.redirect,
  }
));
response = new Response(response.body, response);
response.headers.set("x-elapsed", Date.now() - start);