logger.js

const winston = require(‘winston‘);
const moment = require(‘moment‘);
const config = require(‘../conf/config‘);
let customLevels = {
    levels: {
        debug: 0,
        info: 1,
        warn: 2,
        error: 3
    },
    colors: {
        debug: ‘blue‘,
        info: ‘green‘,
        warn: 
 
‘yellow‘,
        error: ‘red‘
    }
};

// create the main logger 等級高的包含等級低的輸出日誌
module.exports = logger = new (winston.Logger)({
    level: ‘debug‘,
    levels: customLevels.levels,
    transports: [
        new (winston.transports.Console)({
            level: ‘error‘,
            levels: customLevels.levels,
            timestamp: function(){
 
return moment().format(‘YYYY-MM-DD HH:mm:ss‘)},
            colorize: true,
            silent: config.logStdout //true關閉，false打開
        }),
        new (winston.transports.File)({
            name: ‘info‘,
            filename: ‘./logs/info.log‘, //項目根目錄
            maxsize: 1024 * 1024 * 50, //50M
            level: ‘
 
info‘,
            levels: customLevels.levels,
            timestamp: function(){return moment().format(‘YYYY-MM-DD HH:mm:ss‘)},
            json: false
        })
    ]
})
winston.addColors(customLevels.colors);

使用：

#引入
const logger = require(‘./util/logger‘);
#輸出
logger.debug(‘事件消息：‘ + JSON.stringify(message));
logger.info(‘事件消息：‘ + JSON.stringify(message));
logger.warn(‘事件消息：‘ + JSON.stringify(message));
logger.error(‘事件消息：‘ + JSON.stringify(message));

查看：

winston自定義日誌管理