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Winston logger and daily rotator
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| /** | |
| * Configurations of logger. | |
| */ | |
| const winston = require('winston'); | |
| process.env.NODE_ENV = "production"; | |
| const env = process.env.NODE_ENV; | |
| const fs = require('fs'); | |
| var util = require('util'); | |
| const logDir = 'applicationlog'; | |
| // Create the log directory if it does not exist | |
| if (!fs.existsSync(logDir)) { | |
| fs.mkdirSync(logDir); | |
| } | |
| const successLogger = new (winston.Logger)({ | |
| transports: [ | |
| // colorize the output to the console | |
| new (winston.transports.Console)({ | |
| colorize: true, | |
| level: "info" | |
| }), | |
| new (require('winston-daily-rotate-file'))({ | |
| filename: `${logDir}/-results.log`, | |
| datePattern: 'dd-MM-yyyy', | |
| prepend: true, | |
| level: "info", | |
| timestamp : function() { | |
| return getDateTime(); | |
| } | |
| }) | |
| ] | |
| }); | |
| const errorLogger = new (winston.Logger)({ | |
| transports: [ | |
| // colorize the output to the console | |
| new (winston.transports.Console)({ | |
| colorize: true, | |
| level: "error" | |
| }), | |
| new (require('winston-daily-rotate-file'))({ | |
| filename: `${logDir}/-error.log`, | |
| datePattern: 'dd-MM-yyyy', | |
| prepend: true, | |
| level: "error", | |
| timestamp : function() { | |
| return getDateTime(); | |
| } | |
| }) | |
| ] | |
| }); | |
| if (env === "production") { | |
| errorLogger.remove(winston.transports.Console); | |
| successLogger.remove(winston.transports.Console); | |
| } | |
| function getDateTime(){ | |
| var currentdate = new Date(); | |
| var datetime = currentdate.getDate() + "/" | |
| + (currentdate.getMonth()+1) + "/" | |
| + currentdate.getFullYear() + " " | |
| + currentdate.getHours() + ":" | |
| + currentdate.getMinutes() + ":" | |
| + currentdate.getSeconds(); | |
| return datetime; | |
| } | |
| function formatArgs(args){ | |
| return [util.format.apply(util.format, Array.prototype.slice.call(args))]; | |
| } | |
| console.log = function(){ | |
| successLogger.info.apply(successLogger, formatArgs(arguments)); | |
| }; | |
| console.error = function(){ | |
| errorLogger.error.apply(errorLogger, formatArgs(arguments)); | |
| }; | |
| module.exports = { | |
| 'successlog': successLogger, | |
| 'errorlog': errorLogger | |
| }; |
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