simple node server with cors allow all

server.js

const http = require('http');

const hostname = '127.0.0.1';
const port = 3300;

const server = http.createServer((req, res) => {
    console.log('got request', req.method);
    res.setHeader('Access-Control-Allow-Origin', '*');
    res.setHeader('Access-Control-Allow-Methods', '*');
    res.setHeader('Access-Control-Allow-Headers', '*');
    res.setHeader('Access-Control-Allow-Private-Network', 'true');
    res.setHeader('Access-Control-Max-Age', '86400');
    res.setHeader('Access-Control-Allow-Credentials', 'true');


    if (req.method === 'OPTIONS') {
        // Set CORS headers for preflight requests
        res.statusCode = 200;
        res.end();
    }
    else if (req.url === '/xxx' && req.method === 'GET') {
        res.setHeader('Content-Type', 'application/json');
        res.statusCode = 200;
        res.end(JSON.stringify({ some:1, json: "123" }));
    } else {
        res.statusCode = 404;
        res.end();
    }
});

server.listen(port, hostname, () => {
    console.log(`Server running at http://${hostname}:${port}/`);
});