node-filelog v1.0.15

log your data to files

This module gives you the ability to log to files, it uses two logging methods: msg() and err(). As expected msg() is for normal logging, you should use err() to log critical system errors. The logger makes a filename with the current date, this way it separates a different log file for each day. Each file row starts with a timestamp when the log occurred, followed by the keyword in brackets. All this makes it extremely easy for filtering the files with tools like grep.

Simple Usage:

var logger = require('node-filelog'),
    log = new logger();

log.msg('test', 'this is a test log message'); // <163751[test]> this is a test log message

log.err('database', 'authentication error');   // <163751[database]> authentication error

By default the module uses the location of the file that is run from to log your data, for both log and err files. You can custom add your own folders to log just by adding two parameters when instantiating the logger object. ( Folders must exist! )

log = new logger('/path/to/msg-folder', '/path/to/err-folder');

The first parameter is the so called 'keyword', helpful for tagging different logs. If you just want the plain log with no keywords only time and log data use.

log.useShortLog();
 
log.msg('this is a test log message'); // <164924> this is a test log message
log.err('authentication error');       // <164924> authentication error

The format of the date and time is not really readable, but once you understand it it makes sense. Nonetheless there is a possibility to add separators, to make it more human readable:

log.setTimeSeparator(':');

log.msg('test', 'this is a test log message'); // <16:58:31[test]> this is a test log message
log.err('database', 'authentication error');   // <16:58:31[database]> authentication error

The same is applicable for the filename using: log.setDateSeparator(separator)