Run smartctl then output the data to http

smart.js

const http = require('node:http');
const fs = require('node:fs');
const cp = require('node:child_process');
const url = require('node:url');

const allowedDevices = /(sd[a-z]|nvme\d|nvme\dn1|disk\d)/;

const server = http.createServer();
server.on('request', getSmart);
server.listen(7627, '127.0.0.1');

function getSmart(req, res) {
    try {
        let deviceName = url.parse(req.url, true)?.query?.device || 'sda';
        if (!allowedDevices.test(deviceName)) {
            res.writeHead(400, { 'Content-Type': 'text/plain' });
            res.end('Invalid device name');
            return;
        }
        try {
            let file = fs.statSync('/dev/' + deviceName);
        } catch (e) {
            if (e.code == 'ENOENT') {
                res.writeHead(404, { 'Content-Type': 'text/plain' });
                res.end('Device not found');
                return;
            } else {
                throw e;
            }
        }
        let smartctl = cp.spawnSync('smartctl', ['-A', '/dev/' + deviceName]);
        res.writeHead(200, { 'Content-Type': 'text/plain' });
        res.end(smartctl.stdout);
    } catch (e) {
        res.writeHead(500, { 'Content-Type': 'text/plain' });
        res.end("Internal server error");
        console.error(e);
    }
}