download-java.js

var casper = require('casper').create();

casper.cli.drop("cli");
casper.cli.drop("casper-path");

if (casper.cli.args.length === 0 && Object.keys(casper.cli.options).length === 0) {
    casper.echo('Usage: phantomjs download-java.js <name of file to download>');
    casper.echo('Example: phantomjs download-java.js jdk-7u45-linux-x64.rpm');
    casper.exit(1);
}
var filename = casper.cli.get(0);
casper.echo('Will download file: ' + filename);

// Echo calls to console.log
casper.on('remote.message', function(msg) {
    this.echo('Remote log: ' + msg);
});

// Spoof our UA, just in case Oracle is checking for bots
casper.userAgent('Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.101 Safari/537.36');

casper.start('http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html', function() {
  this.echo('Opened page [' + this.getTitle() + ']');     
});

casper.then(function() {
  // Click the first radio button
  this.click('input[type="radio"]'); 
  this.echo('Clicked the Accept License Agreement button');
});

// Find the first link containing the given text, and return its ID
function findDownloadLinkId(linkText) {
  var links = document.querySelectorAll('a');
  console.log('Found ' + links.length + ' links on page');
  for (var i=0; i<links.length; i++) {
    if (links[i].innerText.indexOf(linkText) > -1) {
      console.log('Found the link. Id = ' + links[i].id);
      return links[i].id;
    }
  }
}

casper.then(function() {
  var linkId = this.evaluate(findDownloadLinkId, filename);

  // ID is invalid (because it contains a dot?), 
  // but luckily Oracle's crazy HTML has name attributes as well as IDs
  this.click('a[name="' + linkId + '"]');
  this.echo('Clicked the Download link');

  // Can't actually download the file :(
  // Waiting for this feature to be merged:
  // https://github.com/ariya/phantomjs/issues/10052
  
});

casper.run();