server/helpers/logger.ts

   1 // Thanks http://tostring.it/2014/06/23/advanced-logging-with-nodejs/
   2 import { mkdirpSync } from 'fs-extra'
   3 import * as path from 'path'
   4 import * as winston from 'winston'
   5 import { FileTransportOptions } from 'winston/lib/winston/transports'
   6 import { CONFIG } from '../initializers/config'
   7 import { omit } from 'lodash'
   8 import { LOG_FILENAME } from '../initializers/constants'
   9
  10 const label = CONFIG.WEBSERVER.HOSTNAME + ':' + CONFIG.WEBSERVER.PORT
  11
  12 // Create the directory if it does not exist
  13 // FIXME: use async
  14 mkdirpSync(CONFIG.STORAGE.LOG_DIR)
  15
  16 function getLoggerReplacer () {
  17   const seen = new WeakSet()
  18
  19   // Thanks: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Cyclic_object_value#Examples
  20   return (key: string, value: any) => {
  21     if (typeof value === 'object' && value !== null) {
  22       if (seen.has(value)) return
  23
  24       seen.add(value)
  25     }
  26
  27     if (value instanceof Error) {
  28       const error = {}
  29
  30       Object.getOwnPropertyNames(value).forEach(key => { error[key] = value[key] })
  31
  32       return error
  33     }
  34
  35     return value
  36   }
  37 }
  38
  39 const consoleLoggerFormat = winston.format.printf(info => {
  40   const obj = omit(info, 'label', 'timestamp', 'level', 'message')
  41
  42   let additionalInfos = JSON.stringify(obj, getLoggerReplacer(), 2)
  43
  44   if (additionalInfos === undefined || additionalInfos === '{}') additionalInfos = ''
  45   else additionalInfos = ' ' + additionalInfos
  46
  47   return `[${info.label}] ${info.timestamp} ${info.level}: ${info.message}${additionalInfos}`
  48 })
  49
  50 const jsonLoggerFormat = winston.format.printf(info => {
  51   return JSON.stringify(info, getLoggerReplacer())
  52 })
  53
  54 const timestampFormatter = winston.format.timestamp({
  55   format: 'YYYY-MM-DD HH:mm:ss.SSS'
  56 })
  57 const labelFormatter = winston.format.label({
  58   label
  59 })
  60
  61 const fileLoggerOptions: FileTransportOptions = {
  62   filename: path.join(CONFIG.STORAGE.LOG_DIR, LOG_FILENAME),
  63   handleExceptions: true,
  64   format: winston.format.combine(
  65     winston.format.timestamp(),
  66     jsonLoggerFormat
  67   )
  68 }
  69
  70 if (CONFIG.LOG.ROTATION.ENABLED) {
  71   fileLoggerOptions.maxsize = CONFIG.LOG.ROTATION.MAX_FILE_SIZE
  72   fileLoggerOptions.maxFiles = CONFIG.LOG.ROTATION.MAX_FILES
  73 }
  74
  75 const logger = winston.createLogger({
  76   level: CONFIG.LOG.LEVEL,
  77   format: winston.format.combine(
  78     labelFormatter,
  79     winston.format.splat()
  80   ),
  81   transports: [
  82     new winston.transports.File(fileLoggerOptions),
  83     new winston.transports.Console({
  84       handleExceptions: true,
  85       format: winston.format.combine(
  86         timestampFormatter,
  87         winston.format.colorize(),
  88         consoleLoggerFormat
  89       )
  90     })
  91   ],
  92   exitOnError: true
  93 })
  94
  95 function bunyanLogFactory (level: string) {
  96   return function () {
  97     let meta = null
  98     let args: any[] = []
  99     args.concat(arguments)
 100
 101     if (arguments[0] instanceof Error) {
 102       meta = arguments[0].toString()
 103       args = Array.prototype.slice.call(arguments, 1)
 104       args.push(meta)
 105     } else if (typeof (args[0]) !== 'string') {
 106       meta = arguments[0]
 107       args = Array.prototype.slice.call(arguments, 1)
 108       args.push(meta)
 109     }
 110
 111     logger[level].apply(logger, args)
 112   }
 113 }
 114
 115 const bunyanLogger = {
 116   trace: bunyanLogFactory('debug'),
 117   debug: bunyanLogFactory('debug'),
 118   info: bunyanLogFactory('info'),
 119   warn: bunyanLogFactory('warn'),
 120   error: bunyanLogFactory('error'),
 121   fatal: bunyanLogFactory('error')
 122 }
 123 // ---------------------------------------------------------------------------
 124
 125 export {
 126   timestampFormatter,
 127   labelFormatter,
 128   consoleLoggerFormat,
 129   jsonLoggerFormat,
 130   logger,
 131   bunyanLogger
 132 }