Logging stdout and stderr of Node

Question

I am using the boilerplate code of mean.io and starting my server with the command:

node server.js 

How do I log stdout and stderr of my Express application?

Here's my file server.js:

'use strict';  /**  * Module dependencies.  */ var mongoose = require('mongoose'),     passport = require('passport'),     logger = require('mean-logger');  /**  * Main application entry file.  * Please note that the order of loading is important.  */  // Initializing system variables var config = require('./server/config/config'); var db = mongoose.connect(config.db);  // Bootstrap Models, Dependencies, Routes and the app as an express app var app = require('./server/config/system/bootstrap')(passport, db);  // Start the app by listening on <port>, optional hostname app.listen(config.port, config.hostname); console.log('Mean app started on port ' + config.port + ' (' + process.env.NODE_ENV + ')');  // Initializing logger logger.init(app, passport, mongoose);  // Expose app exports = module.exports = app; 

Answer 1

What about this?

console.log("I will goto the STDOUT"); console.error("I will goto the STDERR"); 

Note: both of these functions automatically add new line to your input.

If you don't want those newlines appended to your input, do this

process.stdout.write("I will goto the STDOUT") process.stderr.write("I will goto the STDERR") 

Both process.stdout and process.stderr are streams, so you can even pipe a stream into them. See Node.js docs on streams for more info.

Answer 2

You can do this by writing to stdout and stderr streams

process.stdout.write('Hello') 

or

process.stderr.write('Error') 

Better will be to use some thirdparty logging module like winston or bunyan