Main Domain Approach

const express = require("express");
const fs = require("fs"),
  https = require("https"),
  http = require("http");
const { createProxyMiddleware } = require("http-proxy-middleware");

const dacdnDomain = "mydomain.com", dacdnPath = "/vwo"
const ancdnDomain = "mydomain.com", ancdnPath = ""
const yourWebsite = "mydomain.com"

/*

In this example, we have given the value of dacdnPath as "/vwo". This simply means VWO JS code will start proxying the requests to https://mydomain.com/vwo/

*/

/*

Here we have used vwo.yourWebsite.com as a subdomain to proxy the requests. It can be anything, be it a subdomain or a different domain altogether.

dacdnDomain → This is used to proxy all the A/B test/goals/funnels/surveys related requests.
ancdnDomain → This is used to proxy all the recordings/heatmaps/form-analytics related requests.

Unless you wish to have a different server to proxy the recordings/heatmaps/form-analytics related requests, keep the values of dacdnDomain & ancdnDomain the same.

*/

const app = express();
const options = {
  changeOrigin: true,
  router: {
    // "yourDomain": "proxyto",
    [`${ancdnDomain}${ancdnPath}/r1/`]: "https://r1.visualwebsiteoptimizer.com",
    [`${ancdnDomain}${ancdnPath}/r2/`]: "https://r2.visualwebsiteoptimizer.com",
    [`${ancdnDomain}${ancdnPath}/r3/`]: "https://r3.visualwebsiteoptimizer.com",
    [`${dacdnDomain}${dacdnPath}/`]: "https://dev.visualwebsiteoptimizer.com",
    [`${yourWebsite}/`]: "https:///yourwebsite.com",
    "local.com/": "http://localhost:8000",
  },
  //If your account is configured with a non-US data center, replace 'r1', 'r2', 'r3',... with ‘r1eu01’, ‘r2eu01’, ‘r3eu01’,... for Europe and ‘r1as01’, ‘r2as01’, ‘r3as01’,... for India.//
  onProxyReq: function (proxyReq, req, res) {
    proxyReq.setHeader("X-Forwarded-VWO", dacdnDomain + dacdnPath);
    proxyReq.setHeader("X-Forwarded-VWOInsights", ancdnDomain + ancdnPath); // this need not be be same as X-Forwarded-Host
  },
  pathRewrite: {
    [`^${ancdnPath}/r1/`]: '',
    [`^${ancdnPath}/r2/`]: '',
    [`^${ancdnPath}/r3/`]: '',
    [`^${dacdnPath}/`]: '',
  },
};
//If your account is configured with a non-US data center, replace 'r1', 'r2', 'r3',... with ‘r1eu01’, ‘r2eu01’, ‘r3eu01’,... for Europe and ‘r1as01’, ‘r2as01’, ‘r3as01’,... for India.//
app.use("/", createProxyMiddleware(options));

https
  .createServer(
    {
      key: fs.readFileSync("/Users/username/localhost.key"),
      cert: fs.readFileSync("/Users/username/localhost.crt"),
    },
    app
  )
  .listen(443, () => {
    console.log("Listening at :443...");
  });