logger.js

const winston = require('winston'); 
const moment = require('moment-timezone'); 
 
// 自定义时间戳格式化函数，转换为北京时间 
const timestampInBeijing = winston.format((info) => { 
 info.timestamp = moment().tz('Asia/Shanghai').format('YYYY-MM-DD HH:mm:ss'); 
 return info; 
}); 
 
// 使用 printf 格式化日志输出 
const myFormat = winston.format.printf(({ level, message, timestamp, meta }) => { 
 //console.log(level, timestamp, meta); // 这行用来调试 
 return `[${level.toUpperCase()}] ${timestamp} ${meta.ip} ${meta.path} ${meta.statusCode} ${message}`; 
}); 
 
const logger = winston.createLogger({ 
 level: 'info', 
 format: winston.format.combine( 
 timestampInBeijing(), // 使用自定义时间戳格式化函数 
 myFormat 
 ), 
 defaultMeta: { service: 'user-service' }, 
 transports: [ 
 new winston.transports.File({ filename: 'error.log', level: 'error' }), 
 new winston.transports.File({ filename: 'combined.log' }), 
 ], 
}); 
 
if (process.env.NODE_ENV !== 'production') { 
 logger.add(new winston.transports.Console({ 
 format: winston.format.combine( 
 winston.format.colorize(), 
 timestampInBeijing(), // 使用自定义时间戳格式化函 
 myFormat 
 ), 
 })); 
} 
 
module.exports = logger;