Code-MCP

import winston from 'winston'; // ============================================ // Formatting // ============================================ const logFormat = winston.format.combine( winston.format.timestamp({ format: 'YYYY-MM-DD HH:mm:ss' }), winston.format.errors({ stack: true }), winston.format.splat(), winston.format.json() ); const consoleFormat = winston.format.combine( winston.format.colorize(), winston.format.printf(({ level, message, timestamp, stack, ...meta }) => { let msg = `${timestamp} [${level}]: ${message}`; if (stack) { msg += `\n${stack}`; } if (Object.keys(meta).length > 0) { msg += `\n${JSON.stringify(meta, null, 2)}`; } return msg; }) ); // ============================================ // Logger Instance // ============================================ export const logger = winston.createLogger({ level: process.env.LOG_LEVEL || 'info', format: logFormat, defaultMeta: { service: 'my-app' }, transports: [ // Console transport new winston.transports.Console({ format: consoleFormat, }), // File transports (production only usually) new winston.transports.File({ filename: 'logs/error.log', level: 'error', maxsize: 5242880, // 5MB maxFiles: 5, }), new winston.transports.File({ filename: 'logs/combined.log', maxsize: 5242880, // 5MB maxFiles: 5, }), ], }); // ============================================ // Request Logger Middleware // ============================================ /* import { Request, Response, NextFunction } from 'express'; export const requestLogger = (req: Request, res: Response, next: NextFunction) => { const start = Date.now(); res.on('finish', () => { const duration = Date.now() - start; logger.info('HTTP Request', { method: req.method, url: req.originalUrl, status: res.statusCode, duration: `${duration}ms`, ip: req.ip, userAgent: req.get('user-agent'), }); }); next(); }; */ // ============================================ // Usage // ============================================ /* logger.info('Server started', { port: 3000 }); logger.warn('Rate limit exceeded', { ip: '192.168.1.1' }); logger.error('Database connection failed', new Error('Connection timeout')); */