This script monitors my internet usage and prints out the results to the console every time it changes. You can get a session token by going to check your usage in the browser and looking for `?session=<SESSION TOKEN>` in the address bar

usage.js

var Q = require('q')
var sprom = require('sprom')
var hyperquest = require('hyperquest')
var format = require('format-number')({truncate: 2})

var session = '<Session Token>'

//Limits in MB
var dailyLimit = 5000
var weeklyLimit = 15000

function request(period) {
  return Q.promise(function (resolve, reject) {
    hyperquest('https://register.robinson.cam.ac.uk/stats.html?session=' + session + '&period=' + period,
      function (err, res) {
        if (err) reject(err)
        else if (res.statusCode >= 400) reject(new Error('Server responded with status code ' + res.statusCode))
        else resolve(sprom(res))
      })
  })
  .then(function (body) {
    body = body.toString()
    body = body.split(/<h4>/i)
      .slice(1)
      .map(function (computer) {
        computer = computer.split(/<\/h4>/i)
        return {
          name: computer[0].trim(),
          table: parseTable(computer[1])
        }
      })

    return body
  })
}
function parseTable(str) {
  return str.split(/<tr[^>]*>/i)
    .slice(1)
    .map(function (row) {
      return row.split(/<t(?:d|h)[^>]*>/i)
      .slice(1)
      .map(function (cell) {
        return cell.split(/<\/t(?:d|h)>/i)[0].trim()
      })
    })
}

function extractValues(computers) {
  var tables = computers.map(function (c) { return c.table })
  return tables.map(function (t) { return Number(t[1][3].replace(/\,/g, '')) })
}

function get(period) {
  return request(period)
    .then(extractValues)
    .then(function (values) {
      return values.reduce(function (a, b) { return a > b ? a : b })
    })
}

var last = [0,0]
function update() {
  return Q.all([get('daily'), get('weekly')])
    .spread(function (daily, weekly) {
      if (daily != last[0] || weekly != last[1]) {
        last = [daily, weekly]
        console.log()
        console.log('Daily: ' + format(daily) + '/' + format(dailyLimit) + ' => ' + format(daily/5000 * 100) + '%')
        console.log('Weekly: ' + format(weekly) + '/' + format(weeklyLimit) + ' => ' + format(weekly/15000 * 100) + '%')
      }
    })
    .then(null, function (err) {
      console.error(err.stack)
    })
}

function run() {
  update()
    .fin(function () {
      Q.delay(20000).done(run)
    })
    .done()
}

run()