koa-bunyan-logger

import Koa from 'koa'; import bunyan from 'bunyan'; import koaBunyanLogger from 'koa-bunyan-logger'; const app = new Koa(); // Create a Bunyan logger instance, which koa-bunyan-logger will use const appLogger = bunyan.createLogger({ name: 'my-koa-app', level: 'info', serializers: bunyan.stdSerializers }); // Apply the main logging middleware with the custom logger instance app.use(koaBunyanLogger(appLogger)); // Add middleware for setting a request ID context app.use(koaBunyanLogger.requestIdContext()); // Add middleware for logging request/response cycles app.use(koaBunyanLogger.requestLogger({ // Example option: ignore specific paths from detailed request logging ignorePath: ['/healthcheck', '/metrics'] })); // Custom application middleware to use the logger in a request context app.use(async (ctx, next) => { ctx.log.info('Received request from %s for %s', ctx.request.ip, ctx.path); await next(); // Note: 'x-response-time' header might need to be set by another middleware if desired ctx.log.info({ status: ctx.status }, 'Handled request for %s', ctx.path); }); // Simple route handling app.use(async (ctx) => { if (ctx.path === '/healthcheck') { ctx.body = 'OK'; } else { ctx.body = 'Hello World'; } }); // IMPORTANT: Disable Koa's default error handler to prevent raw stack traces app.on('error', () => {}); const PORT = process.env.PORT ?? 8000; app.listen(PORT, () => { console.log(`Server listening on http://localhost:${PORT}`); console.log('To view structured logs, pipe output to bunyan CLI: node yourfile.js | npx bunyan -o short'); });