express-requests-logger

import express from 'express'; import audit from 'express-requests-logger'; import bunyan from 'bunyan'; const app = express(); const port = 3000; // Initialize a Bunyan logger for structured logging const logger = bunyan.createLogger({ name: 'my-express-app', level: 'info' // Set default log level }); // Add express.json() middleware to parse JSON request bodies app.use(express.json()); // Apply the express-requests-logger middleware app.use(audit({ logger: logger, // Provide the initialized logger doubleAudit: true, // Log once on request arrival, and again after response is sent excludeURLs: ['/health'], // URLs to entirely skip logging for request: { maskBody: ['password', 'creditCardNumber'], // Mask sensitive fields in the request body excludeHeaders: ['authorization'] // Exclude 'Authorization' header from logs }, response: { maskBody: ['jwtToken'], // Mask sensitive fields in the response body maxBodyLength: 200 // Limit the length of logged response body content }, shouldSkipAuditFunc: (req, res) => { // Example: Skip logging successful responses to /data return req.path === '/data' && res.statusCode === 200; } })); // Define a simple root route app.get('/', (req, res) => { logger.info('Received request for root path.'); res.status(200).send('Welcome to the API!'); }); // Define a login route to demonstrate body masking app.post('/login', (req, res) => { logger.info('Attempting user login.'); const { username, password } = req.body; if (username === 'test' && password === 'secret') { res.status(200).json({ message: 'Login successful', jwtToken: 'a.b.c.123' }); } else { res.status(401).json({ message: 'Invalid credentials' }); } }); // Define a health check route (will be excluded from logs) app.get('/health', (req, res) => { res.status(200).send('API is healthy'); }); // Start the Express server app.listen(port, () => { logger.info(`Server listening on port ${port}`); });