server.js

//This is needed in order to test 404.html, router.js, and api.html

//NPM-Free Server by The Jared Wilcurt
//All you need to run this is an installed copy of Node.JS

//Require in some of the native stuff that comes with Node
var http = require("http");
var url = require("url");
var path = require("path");
var fs = require("fs");
//Port number to use
var port = process.argv[2] || 8000;
//Colors for CLI output
var WHT = "\033[39m";
var RED = "\033[91m";
var GRN = "\033[32m";

//Create the server
http.createServer(function (request, response) {

    //The requested URL like http://localhost:8000/file.html
    var uri = url.parse(request.url).pathname;
    //get the file.html from above and then find it from the current folder
    var filename = path.join(process.cwd(), uri);

    //Setting up MIME-Types
    var contentTypesByExtension = {
        '.html': "text/html",
        '.css':  "text/css",
        '.js':   "text/javascript",
        '.json': "text/json",
        '.svg':  "image/svg+xml"
    };

    //Check if the requested file exists
    fs.exists(filename, function(exists) {
        //If it doesn't
        if (!exists) {
            //Output a red error pointing to failed request
            console.log(RED + "FAIL: " + filename);
            //Redirect the browser to the 404 page
            filename = path.join(process.cwd(), '/404.html');
        //If the requested URL is a folder, like http://localhost:8000/catpics
        } else if (fs.statSync(filename).isDirectory()) {
            //Output a green line to the console explaining what folder was requested
            console.log(GRN + "FLDR: " + WHT + filename);
            //redirect the user to the index.html in the requested folder
            filename += '/index.html';
        }

        //Assuming the file exists, read it
        fs.readFile(filename, "binary", function(err, file) {
            //Output a green line to console explaining the file that will be loaded in the browser
            console.log(GRN + "FILE: " + WHT + filename);
            //If there was an error trying to read the file
            if (err) {
                //Put the error in the browser
                response.writeHead(500, {"Content-Type": "text/plain"});
                response.write(err + "\n");
                response.end();
                return;
            }

            //Otherwise, declar a headers object and a var for the MIME-Type
            var headers = {};
            var contentType = contentTypesByExtension[path.extname(filename)];
            //If the requested file has a matching MIME-Type
            if (contentType) {
                //Set it in the headers
                headers["Content-Type"] = contentType;
            }

            //Output the read file to the browser for it to load
            response.writeHead(200, headers);
            response.write(file, "binary");
            response.end();
        });

    });

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

//Message to display when server is started
console.log(WHT + "Static file server running at\n  => http://localhost:" + port + "/\nCTRL + C to shutdown");