Script to capture screen using phantomjs.org headless

phjs-screencapture.js

// Copyright: (C) 2015 MacMladen <macmladen@gmail.com>
// License: GPL-2.0
// Prequisite:
// having installed phantomjs from http://phantomjs.org
// You have to change variables to suit your needs
// Usage:
// $ phantomsj script.js
// it will produce capture file in same folder
// you can figure out the rest ;)
var
  page = require('webpage').create(),
  url  = 'http://apple.com',        // <- change to your url
  screenFile   = 'screenshot.png',  // <- change to desired filename
  screenWidth  = 320,  // width of screen capture
  screenHeight = 0,    // height is important only if screen is clipped, otherwise is full height (kinda)
  screenTop    = 0,    // if you choose to capture some other part
  screenLeft   = 0,    // ditto
  screenZoom   = 1;    // zooming

//viewportSize being the actual size of the headless browser
page.viewportSize = { width: screenWidth, height: screenHeight };
//the clipRect is the portion of the page you are taking a screenshot of
if (screenHeight) {
  page.clipRect = { top: 0, left: 0, width: screenWidth, height: screenHeight };
}
if (screenZoom) {
  page.zoomFactor = screenZoom;
}

page.open(url, function (status) {
  if (status !== 'success') {
    console.log('Unable to load the address!');
    phantom.exit(1);
  } else {
    window.setTimeout(function () {
      page.render(screenFile);
      phantom.exit();
    }, 200);
  }
});