NodeJS Use Cases

const http = require('http');
console.log('Starting server...');
var config = {
 port: 80,
 contentType: 'application/json; charset=utf-8'
};
// JSON-API server on port 80
var server = http.createServer();
server.listen(config.port);
server.on('error', (err) => {
 if (err.code == 'EADDRINUSE') console.error('Port '+ config.port +' is already in use');
 else console.error(err.message);
});
server.on('request', (request, res) => {
 var remoteAddress = request.headers['x-forwarded-for'] || request.connection.remoteAddress; //
Client address
 console.log(remoteAddress +' '+ request.method +' '+ request.url);

 var out = {};
 // Here you can change output according to `request.url`
 out.test = request.url;
 res.writeHead(200, {
 'Content-Type': config.contentType
 });
 res.end(JSON.stringify(out));
});
server.on('listening', () => {
 c.info('Server is available: http://localhost:'+ config.port);
});