Routing Module.

index.js

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


// All the routes are defined here.
const router = [
  {	
  'url': '/',
  'fn': (req, res) => {
    res.writeHead(200, { 'Content-Type': 'text/html' });
    res.write("<h3>Home Page</h3>");
    res.end();
    }	
  },
  {	
  'url': '/about',
  'fn': (req, res) => {
    res.writeHead(200, { 'Content-Type': 'text/html' });
    res.write("<h3>About Page</h3>");
    res.end();
    }	
  },
  {	
  'url': '/contact',
  'fn': (req, res) => {
    res.writeHead(200, { 'Content-Type': 'text/html' });
    res.write("<h3>Contact Page</h3>");
    res.end();
    }	
  },
]

// Used to match route and return a function that is match else return default function.
function match(router, url) {
	for(let obj of router) {
		if(obj['url'] === url) {
			return obj['fn'];
		}
	}
	return (req, res) => {
		res.writeHead(200, { 'Content-Type': 'text/html' });
		res.write("UNKNown Page");
		res.end();
	}
}

const PORT = process.env.PORT || 5000;

const app = http.createServer((req, res) => {
	const url = req.url;
	let m = match(router, url);
	m(req, res);
});


app.listen(PORT, () => {
	console.log(`Server is running on port ${PORT}`);
});