Save all images contained in a website domain/paths

package.json

{
  "name": "rakeup",
  "version": "0.0.1",
  "author": "Fabrizio Codello",
  "engines": {
    "node": "0.6.x"
  },
  "private": true,
  "dependencies": {
    "http-agent": "0.1.x",
    "jsdom": "0.2.x"
  }
}

server.js

var httpAgent = require('http-agent'),
	jsdom = require('jsdom'),
	http = require('http'),
	url = require('url'),
	fs = require('fs'),
	exec = require('child_process').exec,
	child;

// check if directory exists
function dirExistsSync(dir) {
	try {
		return fs.statSync(dir).isDirectory();
	} catch (err) {
		return false
	}
}

// retrieve a resource and save it
function saveImage(options, name) {
	http.get(options, function(res) {
	    var imageData = '';

	    res.setEncoding('binary');

	    res.on('data', function(chunk){
	        imageData += chunk;
	    })

	    res.on('end', function() {
	        fs.writeFile(savePath + name, imageData, 'binary', function(err) {
	            if (err) throw err;
	        });
	    });

	}).on('error', function(e) {
		console.log("Got error: " + e.message);
	});
}

var domain = 'boards.4chan.org',
	domainPaths = ['v', 'sci'],
	savePath = './images/',
	count = 0;

var agent = httpAgent.create(domain, domainPaths);

agent.addListener('next', function (err, agent) {
	jsdom.env({
		html: agent.body,
		scripts: [
			'http://code.jquery.com/jquery-1.7.2.min.js'
		]
	}, function (err, window) {
		var $ = window.jQuery;

    	// grab all image URLs and save them on savePath
		$('img').each(function(index) {
			var imgSrc = $(this).attr('src');
			// add http: as by default the path is //path
			var imgPath = (~imgSrc.indexOf('http:') ? imgSrc : 'http:'+ imgSrc);
			var fullURL = url.parse(imgPath);

			var options = {
			    host: fullURL.host,
			    port: 80,
			    path: fullURL.path
			};

			var paths = fullURL.path.split('/'),
				fileName = paths[paths.length - 1];

			saveImage(options, fileName);
			count++;
		});

		agent.next();
	});
});

agent.addListener('stop', function(agent) {
	console.log('* '+ count +' images saved.');
	console.log('* Done.');
});

// create savePath if does not exists
if (!dirExistsSync(savePath)) {
	fs.mkdir(savePath, function(err) {
		if (err) throw err;
	});
} else {
	// if exists remove all directory contents
	child = exec('rm -rf '+ savePath +'*');
}

console.log('* Grabbing all images from '+ domain +'.');
console.log('* Paths: /'+ domainPaths.join(' /') +'.');
console.log('* Download dir: '+ savePath);
agent.start();