Minimal Facebook profile scraper

facebookProfile.js

var fs = require('fs');

var casper = require('casper').create({
  verbose: true,
  userAgent: "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.98 Safari/537.36",
  pageSettings: {
    loadImages: false,
    loadPlugins: false
  }
});

var args = {
    username: casper.cli.get('username'),
};

var cookiesPath = 'cookies/cookies.txt';

loadCookies(cookiesPath);

var start = Date.now(); // To output time taken
var email = 'email@example.com';
var password = 'facebook password';

// Load the page with a wide display for debugging purposes
casper.start('https://www.facebook.com/login.php')
  .viewport(1600,1000);

casper.then(function() {
  var title = this.getTitle();

  casper.echo(title);
  
  // If cookies have expired
  if (title !== 'Facebook') {
    casper.waitForSelector('#login_form', function() {
      casper.echo('Logging in');
      this.sendKeys('input[name=email]', email);
      this.sendKeys('input[name=pass]', password);
      this.click('button[name=login]');

      // Wait till login disappears
      casper.waitWhileSelector("#login_form");

      saveCookies('cookies/cookies.txt');
    });
  }
});

// Open the users page
casper.thenOpen('https://www.facebook.com/' + args.username + '/');

casper.waitForSelector('#profile_intro_card', function() { 
  console.log(this.evaluate(getProfileItems).filter(function(item) {
    return item != '';
  }));
})

function getProfileItems() {
  var profileItems =  document.querySelectorAll('#profile_intro_card ._5xu4');

  return Array.prototype.map.call(profileItems, function (item) {
    var text =  item.innerText;
    
    if (text === 'Details') return '';

    return text;
  });
}

casper.run(function() {
  console.log('Time taken: ', (Date.now() - start)/1000, 's');
  this.exit();
});

// Debugging helper to capture the current screen
function captureLarge(casper, filename) {
  casper.capture(filename, {
    top: 0,
    left: 0,
    width: 1600,
    height: 1000,
  });
}

function saveCookies(cookiesPath) {
    var cookies = JSON.stringify(phantom.cookies);
    fs.write(cookiesPath, cookies, 644);
}

function loadCookies(cookiesPath) {
    var data = fs.read(cookiesPath);
    phantom.cookies = JSON.parse(data);
}