winston 으로 만든 logger 파일

logger.js

const winston = require('winston');
const config = winston.config;

function getLocalDateTimeString(date) {
    if (date) {
        const todatStr = date.toLocaleDateString('ko-KR', { year: "numeric", month: "2-digit", day: "2-digit", hour : "numeric", minute : "numeric", second : "numeric" });
        const tempArr = todatStr.split(", ");
        const dateArr = tempArr[0].split("/");
        return[dateArr[2], dateArr[0], dateArr[1]].join("-")+" "+tempArr[1];
    }
    return "";
}


const logger =  new (winston.Logger)({
    transports: [
        //콘솔 로그
        new (winston.transports.Console)({
            level : "info",
            timestamp: function() {
                return getLocalDateTimeString(new Date());
            },
            formatter: function(options) {
                // - Return string will be passed to logger.
                // - Optionally, use options.colorize(options.level, <string>) to
                //   colorize output based on the log level.
                return options.timestamp() + ' ' +
                    config.colorize(options.level, options.level.toUpperCase()) + ' ' +
                    (options.message ? options.message : '') +
                    (options.meta && Object.keys(options.meta).length ? '\n\t'+ JSON.stringify(options.meta) : '' );
            }
        }),
        // 파일 로그
        new (winston.transports.File)({
            level : "info",
            filename: 'file_download_info.log',
            timestamp: function() {
                return getLocalDateTimeString(new Date());
            },
            formatter: function(options) {
                return options.timestamp() + ' ' +
                    config.colorize(options.level, options.level.toUpperCase()) + ' ' +
                    (options.message ? options.message : '') +
                    (options.meta && Object.keys(options.meta).length ? '\n\t'+ JSON.stringify(options.meta) : '' );
            }
        })

    ]
});
module.exports = logger;

useLogger.js

const logger = require('./logger');

logger.info("hello");
logger.info({name : "rkd", age : 32});
logger.error(new Error('this is error log'));