const express = require('express'); const app = express(); const tools = { "2C3AE843A15F": { relayOn: false, ledOn: true, date: "2018-02-01", }, }; const server = app.listen(3000, function () { console.log('Example app listening on port 3000!'); }); app.use('/', express.static('dist')); app.get('/api/tool/:mac', function (req, res) { const mac = req.params.mac; const data = tools[mac]; if (!data) { res.send(404); } console.log("Request from MAC: " + mac); res.setHeader('Content-Type', 'application/json'); res.send(JSON.stringify(data)); });