Simple-Node-HTTP-Server

A simple node HTTP server written in Node.js using only built in modules. The server uses http to create the server and handle incoming requests and responses. It uses path to handle file manipulation, including reading extention names and concatenating paths. Finally, it uses fs to read the HTML files that the server responds with.

This server is hosted for free on Heroku at https://marks-node-http-server.herokuapp.com/.

Server Code

const fs = require('fs');
const http = require('http');
const path = require('path');

const SERVER_PORT = process.env.PORT || 5001;

const server = http.createServer((request, response) => {
  // Route request to root or requested page
  const simpleRouter = request.url === '/' ? 'index.html' : request.url;
  let filePath = path.join(__dirname, 'pages', simpleRouter);

  const fileExtention = path.extname(filePath);

  let contentType = 'text/html';
  switch (fileExtention) {
    case '.js':
      contentType = 'text/javascript';
      break;
    case '.css':
      contentType = 'text/css';
      break;
    case '.json':
      contentType = 'application/json';
      break;
  }

  if (fileExtention == '' && contentType == 'text/html') {
    filePath += '.html';
  }

  fs.readFile(filePath, (err, content) => {
    if (err) {
      if (err.code == 'ENOENT') {
        fs.readFile(
          path.join(__dirname, 'pages', '404.html'),
          (err, content) => {
            if (err) {
              console.log("Can't load 404 Page");
              response.end();
            }
            response.writeHead(200, { 'Content-Type': 'text/html' });
            response.end(content, 'utf8');
          }
        );
      } else {
        path.join(__dirname, 'pages', '404.html');
      }
    } else {
      response.writeHead(200, { 'Content-Type': contentType });
      response.end(content, 'utf8');
    }
  });
});

server.listen(SERVER_PORT, () =>
  console.log(`Starting server on port ${SERVER_PORT}`)
);