You should try JSON

tryingJSON.js

const request = require('request');

const INIT_URL = 'http://letsrevolutionizetesting.com/challenge.json';

function requestChallenge(url) {
  return new Promise((resolve, reject) => {
    request.get(url, { json: true }, (error, response, body) => {
      if (error) {
        reject(error);
      } else {
        resolve(body);
      }
    });
  });
}

function followChallenge(url = INIT_URL) {
  return requestChallenge(url)
  .then((challenge) => {
    if (Object.prototype.hasOwnProperty.call(challenge, 'follow')) {
      return followChallenge(challenge.follow.replace('challenge?', 'challenge.json?'));
    }

    return challenge;
  });
}

followChallenge()
.then((result) => {
  console.log('final result is', result);
  process.exit(0);
})
.catch((err) => {
  console.error('oops an error', err);
  process.exit(0);
});



// I also wanted to take a few minutes and try transferring it to ruby sooo...
/**
#!/usr/bin/env ruby

require 'json'
require 'net/http'

result = nil
uri = URI('http://letsrevolutionizetesting.com/challenge.json')
while result == nil
  res = Net::HTTP.get_response(uri)
  challenge = JSON.parse(res.body)
  if challenge.has_key?("follow")
    uri = URI(challenge["follow"].sub("challenge?", "challenge.json?"))
  else
    result = challenge
  end
end

puts result
*/