server.js

var http = require('http');
var fs = require('fs');
var ip = '127.0.0.1';
var port = 2000;
var www = process.cwd();
var mimetypes = {'html': 'text/html', 'js': 'text/javascript', 'css': 'text/css', 'png': 'image/png', 'svg': 'image/svg'};

http.createServer(function (req, res) {
	fs.realpath(www+req.url, function(err, realpath){
		if (err || realpath.substr(0, www.length+1) != www+'/')
			{
			res.writeHead(404, {'Content-Type': 'text/plain'});
			res.end('No such file exists, sorry!');
			}
		else
			{
			var filename = realpath.split('/').pop();
			var extension = (filename.split('.').length > 1)
				? filename.split('.').pop()
				: 'txt';
			var mimetype = (mimetypes[extension] === undefined)
				? 'application/octet-stream'
				: mimetypes[extension];
			res.writeHead(200, {'Content-Type': mimetype});
			fs.createReadStream(realpath).pipe(res); //herein lies the problem
			res.end();
			}
	});
}).listen(port, ip);
console.log('Serving '+www+' at '+ip+':'+port);