NodeJS Slip 6A solution

//demo_server.js

var http = require('http');
var url = require('url');
var fs = require('fs');

http.createServer(function (req, res) {
var q = url.parse(req.url, true);
var filename = "." + q.pathname;

fs.readFile(filename, function(err, data) {
if (err) {
res.writeHead(404, {'Content-Type': 'text/html'});
return res.end("404 Not Found");
}

res.writeHead(200, {'Content-Type': 'text/html'});
res.write(data);
return res.end();
});
}).listen(8080);