Node.js Server That Includes Other Files Too

app.js

var url = require("url");
var fs = require("fs");

var Path = require("path");

function renderHtml(path, response) {
    fs.readFile(path,
        null,
        function(error, data) {
            if (error) {
                response.writeHead(500, { "Content-Type": "text/plain" });
                response.writeHead(404);
                response.write("Page not found or route not defined.");
            } else {
                response.writeHead(200, { "Content-Type": "text/html" });
                response.write(data);
            }
            response.end();
        });
}

module.exports = {
    handleRequest: function(request, response) {
        var path = url.parse(request.url).pathname;
        var ext = Path.extname(path);
        var contentType;
        switch(ext) {
            case ".html":
                contentType = "text/html";
                break;
            case ".sass":
            case ".scss":
            case ".css":
                contentType = "text/css";
                break;
            case ".js":
                contentType = "text/javascript";
                break;
            case ".png":
                contentType = "image/png";
                break;
            case ".jpg":
            case ".jpeg":
                contentType = "image/jpeg";
                break;   
            case ".ico":
                contentType = "image/x-icon";
                break;
        }

        response.writeHead(200, { 'Content-Type': contentType });

        switch (path) {
            case "/":
                renderHtml("./index.html", response);
                break;
            default:
                console.log("Path: " + path);
                fs.readFile("." + path,
                    null,
                    function(error, data) {
                        if (error) {
                            response.writeHead(500, { "Content-Type": "text/plain" });
                            response.writeHead(404);
                            console.log(error.message);
                            response.write("Page not found or route not defined.");
                        } else {
                            response.writeHead(200, { "Content-Type": contentType });
                            response.write(data);
                        }
                        response.end();
                    });
                //response.end();

        }
    }
};