Ping a Heroku web app to keep it from sleeping.

ping.js

var request = require('request');
var CronJob = require('cron').CronJob;

var URL = "https://your-heroku-name-web-app.com/";
var CRONTIME = "0 25,55 * * * *";
var job;


function ping() {
  request(URL, function(err, response, body) {
    if (!err && response.statusCode === 200) {
      console.log(body);
    }
    else {
      console.error("Oh dear...", err);
    }
  })
}


// DO THE THING!
(function() {
  job = new CronJob({
    cronTime : CRONTIME,
    onTick : ping,
    start : false
  })
  
  job.start();
})()