picturize.js

// PhantomJS script for rendering a page to an image.
// Author: Lucas Possatti

// Require system to get the command line arguments.
var system = require('system');

// Verify if the program received the proper arguments. And warns the user
// if necessary.
if (system.args.length != 3) {
	console.log('Usage: phantomjs picturize.js page_url image_path');
	console.log('\n`picturize.js` renders the specified page to an image on your disk.');

// Capture the image if everything is fine.
} else {
	// Get the arguments.
	var url = system.args[1];
	var image_path = system.args[2];

	// Make garanteed the file extension is png. Otherwise, the
	// `page.render()` may not work.
	if (!image_path.match('.*\.png')) {
		image_path = image_path + '.png';
	}

	// Tell the user to wait.
	console.log(' >> Rendering ' + url + ' to ' + image_path + ' ...');

	// Create a new page.
	var page = require('webpage').create();

	// Load URL.
	page.open(url, function() {

		// Render page to an image and save.
		page.render(image_path);

		// Finish the program.
		console.log(' >> Rendering finished.');
		phantom.exit();
	});
}