heroku-rate-limit.js

const axios = require('axios');
const Heroku = require('heroku-client');

const heroku = new Heroku({ token: process.env.API_KEY })

const URLS = [
  'https://api.myip.com/?id=1',
  'https://api.myip.com/?id=2',
  'https://api.myip.com/?id=3',
  'https://api.myip.com/?id=4',
  'https://api.myip.com/?id=5',
  'https://api.myip.com/?id=6',
  'https://api.myip.com/?id=7',
];

function throwRateLimitErrorIfNeeded(url) {
  if (url.includes('id=5')) {
    const err = new Error('Rate limit exceeded');
    err.status = 429;
    throw err;
  }
}


async function main() {
  try {
    for await (const url of URLS) {
      const response = await axios.get(url);
      console.log(`URL: ${url} (${response.data.ip})`);

      throwRateLimitErrorIfNeeded(url);
    }
  } catch (err) {
    console.log(err.message);
    if (err.status === 429) {
      await restartMe();
    }
  }
}

async function restartMe() {
  console.log('Restarting myself..')
  await heroku.delete(`/apps/${process.env.APP_NAME}/dynos/${process.env.DYNO_NAME}.1`);
}

main();