Take a screenshot with selenium from node

install.txt

npm install selenium-webdriver
npm install selenium-server-standalone-jar
npm install phantomjs

screenshot.js

var fs = require('fs');

var jar = require('selenium-server-standalone-jar');
console.log(jar.path);
console.log(jar.version);

var webdriver = require('selenium-webdriver'),
    SeleniumServer = require('selenium-webdriver/remote').SeleniumServer;

var server = new SeleniumServer(jar.path, {
  port: 4444
});

server.start();

var driver = new webdriver.Builder().
    usingServer(server.address()).
//    withCapabilities(webdriver.Capabilities.firefox()).
    withCapabilities(webdriver.Capabilities.phantomjs()).
    build();

driver.get('http://twitter.com');

driver.takeScreenshot().then(function (base64Image) {
    var decodedImage = new Buffer(base64Image, 'base64');
    fs.writeFile('image_decoded.jpg', decodedImage, function(err) {});
    console.log('took screenshot');
});

driver.quit();