A simple node module that makes console.log/error/warn/debug statements log through winston (simply include at the beginning of your app)

logging.js

'use strict';

var util = require('util'),
    winston = require('winston'),
    logger = new winston.Logger(),
    production = (process.env.NODE_ENV || '').toLowerCase() === 'production';

module.exports = {
    middleware: function(req, res, next){
        console.info(req.method, req.url, res.statusCode);
        next();
    },
    production: production
};

// Override the built-in console methods with winston hooks
switch((process.env.NODE_ENV || '').toLowerCase()){
    case 'production':
        production = true;
        logger.add(winston.transports.File, {
            filename: __dirname + '/application.log',
            handleExceptions: true,
            exitOnError: false,
            level: 'warn'
        });
        break;
    case 'test':
        // Don't set up the logger overrides
        return;
    default:
        logger.add(winston.transports.Console, {
            colorize: true,
            timestamp: true,
            level: 'info'
        });
        break;
}

function formatArgs(args){
    return [util.format.apply(util.format, Array.prototype.slice.call(args))];
}

console.log = function(){
    logger.info.apply(logger, formatArgs(arguments));
};
console.info = function(){
    logger.info.apply(logger, formatArgs(arguments));
};
console.warn = function(){
    logger.warn.apply(logger, formatArgs(arguments));
};
console.error = function(){
    logger.error.apply(logger, formatArgs(arguments));
};
console.debug = function(){
    logger.debug.apply(logger, formatArgs(arguments));
};

thx!

helpful

line 44 - >
logger.info.apply(logger, formatArgs(arguments));
should be (?) ->
logger.log.apply(logger, formatArgs(arguments));

awesome, thanks!

The code is right. I've tried your suggestion and it doesn't work.

This is a very useful idea because it allows you to program as you normally would in debug mode yet override logging in production so that it isn't synchronous. Simple and good.

Simple ES6 syntax :)

    console.log = (...args) => logger.info.call(logger, ...args);
    console.info = (...args) => logger.info.call(logger, ...args);
    console.warn = (...args) => logger.warn.call(logger, ...args);
    console.error = (...args) => logger.error.call(logger, ...args);
    console.debug = (...args) => logger.debug.call(logger, ...args);

This is helpful! Thanks!

Thanks @fega!