Kurt

regex.js

import proxy from "@fly/proxy"
import { forceSSL } from './lib/utilities'
const origin = proxy("https://viaglamour.com/")
 
/**
 * Rewrite the path to /store/<hostname>
 */
function rewriteRequest(req) {
  const url = new URL(req.url)
  let path = "/store/" + url.hostname.replace(/\.[a-z]+/, '')
 
  path = path + url.pathname
	
	const trailingSlash = path[path.length - 1] === '/'
    path = path + (!trailingSlash && "/" || "")
	
  const newURL = new URL(path, url)
  newURL.search = url.search
  console.log("rewriting path:", url.pathname, path, newURL.toString())
  return new Request(newURL.toString(), req)
}
 
/**
 * Rewrites links in HTML from /store/hostname/ to /
 */
async function rewriteResponseLinks(req, resp) {

const url = new URL(req.url)
resp.headers.set("custom-domain", url.hostname )
// return resp
	
   const contentType = resp.headers.get("content-type") || ""
  if (!contentType.includes("html")) {
    // skip non-html
    return resp
  }
  
  const pathPrefix = "\/store\/" + url.hostname.replace(/\.[a-z]+/, '') + "\/"
  const urlPattern = new RegExp(`https:\/\/viaglamour\.com${pathPrefix}`, 'g')
  const pathPattern = new RegExp(pathPrefix, 'g')
 
  let body = await resp.text()
  console.log("replacing links:", urlPattern)
  body = body.replace(urlPattern, "/")
  console.log("replacing paths:", pathPattern)
  body = body.replace(pathPattern, "/")
 
  resp.headers.delete("content-length")
 
  return new Response(body, resp)
	
}
 
/**
 * Rewrites requests, proxies them through to origin, rewrites html
 */
fly.http.respondWith(forceSSL(async function (req) {
  req.headers.delete("accept-encoding") // so we can rewrite the body
  const url = new URL(req.url)
  req.headers.set("x-requested-domain", url.hostname)
  const redirect = handleWWW(req)
  if(redirect) return redirect;
  const rewritten = rewriteRequest(req)
  const resp = await origin(rewritten)
  return rewriteResponseLinks(req, resp)
}))

function handleWWW(req){
  if(req.hostname.startsWith("www."){
    const url = req.url.replace(/www\./, '')
    return Response.redirect(url, 301)
  }
}