utils.js

function randomString(length) {
	let result = '';
	const characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
	const charactersLength = characters.length;

	for (let i = 0; i < length; i++) {
		result += characters.charAt(Math.floor(Math.random() * charactersLength));
	}

	return result;
}

function sendJson(res, json) {
	res.header('Access-Control-Allow-Origin', '*');
	res.header('Access-Control-Allow-Methods', 'GET');
	res.status(200).json(json);
}

module.exports = { randomString, sendJson };