Simple Node.js Server

log.js

const http = require('http');
const httpStatus = require('http-status-codes');
const port = 3000;
const app = http.createServer();

const getJSONString = (obj) => JSON.stringify(obj, null, 2);

app.on('request', (req, res) => {
  var body = [];

  req.on('data', (bodyData) => {
    body.push(bodyData);
  });

  req.on('end', () => {
    body = Buffer.concat(body).toString();
    console.log(`Request Body Contents: ${body}`);
  });

  console.log(`Method: ${getJSONString(req.method)}`);
  console.log(`URL: ${getJSONString(req.url)}`);
  console.log(`Headers: ${getJSONString(req.headers)}`);

  res.writeHead(httpStatus.OK, {
    'Content-Type': 'text/html'
  });

  let responseMessage = '<h1>Response message.</h1>';
  res.end(responseMessage);
});

app.listen(port);
console.log(`The server has started and is listening on port number: ${port}`);

main.js

const http = require('http');
const httpStatus = require('http-status-codes');
const port = 3000;

const app = http.createServer((req, res) => {
  console.log('Received an incoming request!');
  let responseMessage = '<h1>Hello Node Server!</h1>';

  res.writeHead(httpStatus.OK, {
    'Content-Type': 'text/html'
  });


  res.write(responseMessage);
  res.end();

  console.log(`Sent a response : ${responseMessage}`);
});

app.listen(port);
console.log(`The server has started and is listening on port number: ${port}`);

package.json

{
  "name": "simple-node-server",
  "version": "1.0.0",
  "description": "A simple server with Node.js",
  "main": "main.js",
  "scripts": {
    "start": "node main.js",
    "log": "node log.js",
    "route": "node route.js"
  },
  "author": "Tamas Munkacsi",
  "license": "ISC",
  "dependencies": {
    "http-status-codes": "^1.4.0"
  }
}

route.js

const http = require('http');
const httpStatus = require('http-status-codes');
const port = 3000;
const app = http.createServer();

const routeResponseMap = {
  '/info': '<h1>Info Page</h1>',
  '/contact': '<h1>Contact Page</h1>',
  '/about': '<h1>About Page</h1>',
  '/error': '<h1>Error Page</h1>'
};

app.on('request', (req, res) => {
  const routeResponse = routeResponseMap[req.url];

  res.writeHead(httpStatus.OK, {
    'Content-Type': 'text/html'
  });

  if (routeResponse) {
    res.end(routeResponse);
  } else {
    res.end('<h1>Hello!</h1>');
  }
});

app.listen(port);
console.log(`The server has started and is listening on port number:${port}`);