Сервер функций сумирования и умножения чисел

gistfile1.js

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

var app = {
    '/summ': function(q) {
        return q.x * 1 + q.y * 1;
    },
    '/multi': function(q) {
        return q.x * q.y;
    }
};

// Configure our HTTP server to respond with Hello World to all requests.
var server = http.createServer(function (request, response) {
    var res;
    var data = url.parse(request.url, true);
    var queryData = data.query;

    if (queryData.x != null && queryData.y != null) {

        res = app[data.pathname](queryData);

        response.writeHead(200, {"Content-Type": "text/plain"});
        response.end(data.pathname.replace('/', '') + ': ' + res);
        return;
    }

    response.writeHead(406, { "Content-Type": "text/plain" });
    response.end(' set please x & y to quest string ');
});

// Listen on port 8000, IP defaults to 127.0.0.1
server.listen(8888);