Node.js Logging

Question

Is there any library which will help me to handle logging in my Node.Js application? All I want to do is, I want to write all logs into a File and also I need an options like ro

Answer 1

Winston is strong choice for most of the developers. I have been using winston for long. Recently I used winston with with papertrail which takes the application logging to next level.

Here is a nice screenshot from their site.

How its useful

• you can manage logs from different systems at one place. this can be very useful when you have two backend communicating and can see logs from both at on place.

• Logs are live. you can see realtime logs of your production server.

• Powerful search and filter

• you can create alerts to send you email if it encounters specific text in log.

and you can find more http://help.papertrailapp.com/kb/how-it-works/event-viewer/

A simple configuration using winston,winston-express and winston-papertrail node modules.

import winston from 'winston';
import expressWinston from 'express-winston';
//
// Requiring `winston-papertrail` will expose
// `winston.transports.Papertrail`
//
require('winston-papertrail').Papertrail;
// create winston transport for Papertrail
var winstonPapertrail = new winston.transports.Papertrail({
  host: 'logsX.papertrailapp.com',
  port: XXXXX
});
app.use(expressWinston.logger({
  transports: [winstonPapertrail],
  meta: true, // optional: control whether you want to log the meta data about the request (default to true)
  msg: "HTTP {{req.method}} {{req.url}}", // optional: customize the default logging message. E.g. "{{res.statusCode}} {{req.method}} {{res.responseTime}}ms {{req.url}}"
  expressFormat: true, // Use the default Express/morgan request formatting. Enabling this will override any msg if true. Will only output colors with colorize set to true
  colorize: true, // Color the text and status code, using the Express/morgan color palette (text: gray, status: default green, 3XX cyan, 4XX yellow, 5XX red).
  ignoreRoute: function (req, res) { return false; } // optional: allows to skip some log messages based on request and/or response
}));