server.js

import {createServer} from 'node:http'

const config = {host: '0.0.0.0', port: 7860}

const h_cors = {
	'Access-Control-Max-Age': '86400',
	'Access-Control-Allow-Private-Network': 'true',
	'Access-Control-Allow-Origin': '*',
	'Access-Control-Allow-Methods': 'GET, OPTIONS',
	'Access-Control-Allow-Headers': '*',
	// 'Access-Control-Allow-Credentials': 'false', // omit this header to disallow
}
const h_all = {
	'Content-Type': 'text/javascript',
	'Cache-Control': 'no-cache',
	...h_cors
}

/** @type {Record<string,((request: import('node:http').ServerResponse) => void)>} */ const resp = {
	GET(rx) { rx.writeHead(200, h_all); rx.write('Hello world') },
	OPTIONS(rx) { rx.writeHead(204, h_cors) },
}

const server = createServer((rq, rx) => {
	const handler = resp[rq.method ?? '']
	handler !== undefined && (new URL(`http://${config.host}:${config.port}${rq.url}`)).pathname === '/' ? handler(rx) : rx.writeHead(400)
	rx.end(() => void console.log('%s %d %s %s', (new Date()).toISOString(), rx.statusCode, rq.method, rq.url))
})
server.listen(config.port, config.host, () => void console.log(`Server started at http://${config.host}:${config.port}`))