mini-logger

A really simple logger for web server or others.

Install

npm install mini-logger

Goal

Log levels for logger is useless. Just let debug module handle the debug log. All you need is error log and some custom categories. mini-logger just write logs into different files or stdout, do not care formats(only format Errors and Objects).

Features

• rolling log files based on datetime
• easy to extended
• custom categories
• encoding support
• support Error / Object format

Usage

Example

var path = require('path');
var Logger = require('mini-logger');
var logger = Logger({
  dir: path.join(__dirname, 'logs'),
  categories: [ 'http' ],
  format: '[{category}.]YYYY-MM-DD[.log]'
});

logger.error(new Error('error'));
logger.http('http request url: %s', 'https://github.com');

Options

• dir: log directory path, required.
• categories: custom categories, all categories will add a method to Logger's instance
• format: log file name's format, will pase to momentjs to format. {category} will replace with logger category, default is [{category.}]YYYY-MM-DD[.log]
• stdout: write logs into stdout, default is false
• file: write logs into file, default is true
• errorFormater: formater for errors, default is error-formater
• seperator: the seperator of each line of logs, default is os.EOL + os.EOL
• encoding: output logs' encoding, default is utf-8
• flushInterval: all logs will cache in memory first, every flushInterval ms flush into files. default is 1s
• duration: cut the logs every duration ms. default is 1h
• mkdir: everytime before create a writeStream, will try to mkdirp first. useful when format is like YYYY/MM/DD/[{category}.log], default to false
• timestamp: write timestamp with format YYYYMMDDHHmmssSSS before every line of logs, default is false

Events

Logger will emit an error event when any write streams emit an error. If you don't listen this error event, it will default hanlde by:

function onerror(err) {
  console.error(err.stack);
}

License

MIT