node-server.js

var http = require("http"),
	url = require("url"),
	path = require("path"),
	fs = require("fs")
	port = process.argv[2] || 8888;

http.createServer(function(request, response) {
	var uri = url.parse(request.url).pathname,
		filename = path.join(process.cwd(), uri);

	fs.exists(filename, function(exists) {
		if(!exists) {
			response.writeHead(404, {"Content-Type": "text/plain"});
			response.write("404 Not Found\n");
			response.end();
			return;
		}

		if (fs.statSync(filename).isDirectory()) filename += '/index.html';

		fs.readFile(filename, "binary", function(err, file) {
			if(err) {
				response.writeHead(500, {"Content-Type": "text/plain"});
				response.write(err + "\n");
				response.end();
				return;
			}
			response.writeHead(200);
			response.write(file, "binary");
			response.end();
		});

	});
}).listen(parseInt(port, 10));

console.log("WebUI Aria2 Server is running on http://localhost:" + port );