express-correlation-id

import express from 'express'; import correlator from 'express-correlation-id'; const app = express(); // The correlator middleware should generally be placed after other middleware // that might need to run before a correlation ID is established. app.use(express.json()); // Example: other middleware app.use(correlator()); app.get('/', (req, res) => { // Access the correlation ID via the request object console.log('ID for this request (from req.correlationId()):', req.correlationId()); // Access the correlation ID via the module's static method console.log('ID for this request (from correlator.getId()):', correlator.getId()); res.send(`Correlation ID: ${req.correlationId()}`); }); app.get('/set-id', (req, res) => { const newId = `custom-${Math.random().toString(36).substring(2, 9)}`; req.setCorrelationId(newId); // Set via req object // correlator.setId(newId); // Alternatively, set via static method console.log('New ID set for this request:', req.correlationId()); res.send(`New Correlation ID set: ${req.correlationId()}`); }); const PORT = process.env.PORT || 3000; app.listen(PORT, () => { console.log(`Server listening on port ${PORT}`); });