CasperJS, scrape a FB message history for images and save the URLs in a file

fb.js

var casper = require('casper').create({
    verbose: true,
    logLevel: 'debug',
    pageSettings: {
         loadImages:  false,         // The WebPage instance used by Casper will
         loadPlugins: false,         // use these settings
         userAgent: 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_5) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4'
    }
});
var images = [];
var msgs = [];
var fs=require("fs")

/**
 * Configuration here
 */
var login_username = "login_username";
var login_password = "login_password";

/**
 * Everything starts here!
 * I use the mobile version of facebook as the DOM is waaay simpler to scrape.
 */
casper.start('http://m.facebook.com', function() {

 this.viewport(320,4096);

  this.fill('form#login_form', {
    'email': login_username,
    'pass':  login_password
  }, true);

  this.capture("photo_index.png");
});

var findAttachments = function findAttachments() {
  var aNodes = document.querySelectorAll('a');
  var list = []
  for (var k in aNodes) {
    var href = aNodes[k].href;
    if (/attachment/.test(aNodes[k].href)) {
      list.push(href);
    }
  }
  return list;
};

var handleAttachment = function handleAttachment() {
  this.log('handling attachment response', 'info');
};
var handle = function(document) {
  this.log('handling message response', 'info');
  casper.then(function()  {
    var nextUrl = this.evaluate(function() {
      return document.getElementById('see_older').querySelector('a').href;
    });

    fs.write('next.txt', nextUrl, 'w');

    var attachments = this.evaluate(findAttachments);
    fs.write('attachments.txt', attachments.join("\n"), 'a');
    if (!next) {
      this.log('something happened!', 'error');
      return;
    }
    casper.thenOpen(nextUrl, handle);
  });


  this.capture("message.png");
};


var next = fs.read('next.txt');

casper.thenOpen(next, handle);
casper.run();

next.txt

https://m.facebook.com/messages/read/?tid=[facebook-conversation-id]