Steve's basic web server api

index.js

// import abc from './abc.js'; //local file import
// import express from 'express'; //node_modules
import http from 'node:http'; //import from NodeJS

const server = http.createServer(handleRequests);

const cheeses = ['Cheddar', 'Mozzarella', 'Danish Blue'];

function handleRequests(request, response) {
  //every call from a client comes through here
  switch (request.url) {
    case '/api':
      response.setHeader('Content-Type', 'text/plain');
      response.writeHead(200);
      response.end('API is working');
      break;
    case '/api/cheese':
      // console.log(request.method);
      if (request.method == 'GET') {
        response.setHeader('Content-Type', 'application/json');
        response.writeHead(200);
        const data = {
          cheeses: cheeses,
        };
        const str = JSON.stringify(data);
        response.end(str);
      } else if (request.method == 'POST') {
        response.setHeader('Content-Type', 'application/json');
        response.writeHead(201);
        cheeses.push('Gouda');
        console.log(cheeses);
        response.end(JSON.stringify({ result: 'OK' }));
      } else {
        response.writeHead(405);
        response.end('Method Not Allowed');
      }
      break;
    case '/api/cheese/0':
      response.setHeader('Content-Type', 'application/json');
      response.writeHead(200);
      response.end(JSON.stringify({ cheese: cheeses[0] }));
      break;
    case '/api/cheese/1':
      response.setHeader('Content-Type', 'application/json');
      response.writeHead(200);
      response.end(JSON.stringify({ cheese: cheeses[1] }));
      break;
    case '/api/cheese/2':
      response.setHeader('Content-Type', 'application/json');
      response.writeHead(200);
      response.end(JSON.stringify({ cheese: cheeses[2] }));
      break;
    default:
      response.writeHead(200);
      response.end(request.url);
  }
}

const PORT = process.env.PORT ?? 3333;
// process.argv - arguments on the command line
// console.log(PORT);
server.listen(PORT, (err) => {
  //callback function that runs on initial startup
  if (err) {
    return console.log(err);
    //stops the code running
  }
  console.log(`Listening on PORT ${PORT}`);
});