[PhantomJS] Load and save dynamic webpage

dynamic_page_downloader.js

#!/usr/bin/phantomjs

// This script will load a dynamic page and gives you the content.
// Args: url -> URL to be downloaded.

var system = require('system');

if(system.args.length == 1){
  system.stderr.write("Pass URL as argument to the script");
  phantom.exit(1)
}

url = system.args[1]
 
var page = require('webpage').create();
page.settings.userAgent = 'Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:13.0) Gecko/20100101 Firefox/13.0';

page.onResourceError = function(resourceError) {
    page.reason = resourceError.errorString;
    page.reason_url = resourceError.url;
};

page.onLoadFinished = function(status) {
  if(status == "success"){
    system.stdout.write(page.content);
    phantom.exit();
  }
};
 
page.open(url, function(status){
  if (status !== 'success'){
    system.stderr.write('Unable to access network');
    system.stderr.write("Error opening url" + page.reason_url + ":" + page.reason);
    phatom.exit(1);
  }
  else{
    system.stdout.write(page.content);
    phantom.exit();
  }
});