Take a screenshot with Phantom.js under Node.js

phantom-node-screenshot

/* 

Take a screenshot with Phantom.js under Node.js

APIs
* Phantom  https://github.com/ariya/phantomjs/wiki/API-Reference
* Webpage  https://github.com/ariya/phantomjs/wiki/API-Reference-WebPage

*/

var page = require('webpage').create();

if (phantom.args.length < 2){
    console.log('Usage: screenshot.js URL filename [quoted-selector] [username:password]');
    console.log('   eg: screenshot.js http://www.google.co.uk temp.png');
    console.log('   eg: screenshot.js http://www.google.co.uk region.png "#container"');
    console.log('   eg: screenshot.js https://www.freedharma.com region.png "#container" username:mypassword');
    phantom.exit(1);
}

var args = {
	uri 		: phantom.args[0],
	path		: phantom.args[1],
	selector	: phantom.args[2] || null,
	credentials	: phantom.args[3] || null
};

if (args.credentials != null){
	page.customHeaders={'Authorization': 'Basic '+btoa(args.credentials)};
	// Buggy:
	// page.settings.userName = username;
	// page.settings.password = password;
}

console.log("Running with "+args.uri+" "+args.path+" "+args.selector);

page.open(args.uri, function (status) {
	if (status !== 'success') {
		console.log('Unable to load the uri, '+args.uri);
		phantom.exit(1);
	}
	else {
		window.setTimeout(function () {
			// Ineffective?
			page.viewportSize = { width: '1280px', height: '1280px' };
			if (args.selector){
				var clipRect = page.evaluate(function( args  ) {
					document.body.style.width = '1280px';
					try {
						return document.querySelector(args.selector).getBoundingClientRect();
					}
					catch (e) {
						console.error(e);
						console.log("Unable to fetch bounds for element " + args.selector +" for "+args.uri);
						return null;
					}
				}, args);
			}
			else {
				console.log('No selector');
			}

			if (clipRect) page.clipRect = clipRect;
			page.render(args.path);
			phantom.exit(0);

		}, 500);
	}
});