Tackling_NodeJS/app.js at main · NH-Limon/Tackling_NodeJS · GitHub

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// Dynamic Routing:
// const http = require('http');
// const querystring = require('querystring');
// const port = process.env.PORT || 8000;
// const sendPlainText = (req, res) => {
//     res.setHeader('Content-Type', 'text/plain');
//     res.end('Hi there!');
// };
// const sendJsonData = (req, res) => {
//     res.setHeader('Content-Type', 'application/json');
//     res.end(JSON.stringify({name : "Limon", roll : 135735, numbers : [1,2,3,4,5]}));
// };
// const respondEcho = (req, res) => {
//     const {input = ''} = querystring.parse(
//         // '/echo?input=limon'
//         // 'input=limon'
//         req.url.split('?').slice(1).join('') // http://localhost:8000/echo?input=limon
//     );
//     res.setHeader('Content-Type', 'application/json');
//     res.end(
//         JSON.stringify(
//             {
//                 normal : input,
//                 shouty : input.toUpperCase(),
//                 lengthCount : input.length,
//                 backwards : input.split('').reverse().join('')
//             }
//         )
//     );
// }
// const responseNotFound = (req, res) => {
//     res.writeHead(404, {'Content-Type' : 'text/html'});
//     res.end('<center>404 Not Found<center>');
// }
// const server = http.createServer((req, res) => {
//     if (req.url === '/') return sendPlainText(req, res);
//     if (req.url === '/json') return sendJsonData(req, res);
//     if (req.url.match(/^\/echo/)) return respondEcho(req, res);
//     responseNotFound(req, res);
// });
// server.listen(port);
// console.log(`Server is running on port: ${port}.`);


const http = require('http');
const querystring = require('querystring');
const port = process.env.PORT || 3000;
const sendPlainText = (req, res) => {
    res.setHeader('Content-Type', 'text/plain');
    res.end('Hello there. I am Nahid Hasan Limon');
};
const sendJsonData = (req, res) => {
    res.setHeader('Content-Type', 'application/json');
    res.end(JSON.stringify({name : "Nahid Hasan Limon", age : 20, address : "Barishal, Bangladesh"}));
};
const echoData = (req, res) => {
    const {input = ''} = querystring.parse(
        req.url.split('?').slice(1).join('')
    );
    res.setHeader('Content-Type', 'application/json')
    res.end(JSON.stringify(
        {
            normal : input,
            upperCase : input.toUpperCase(),
            length : input.length,
            backwards : input.split('').reverse().join('')
        }
    ))
};
const errorData = (req, res) => {
    res.writeHead(404, {'Content-Type' : 'text/html'});
    res.end('<center><h1>404 Not Found!</h1></center>');
};

const server = http.createServer((req, res) => {
    if (req.url === '/') return sendPlainText(req, res);
    if (req.url === '/json') return sendJsonData(req, res);
    if (req.url.match(/^\/echo/)) return echoData(req, res);
    errorData(req, res);
});
server.listen(port);
console.log('Your server is running on port : ' + port);