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Advanced Express Web Application Development

You're reading from   Advanced Express Web Application Development For experienced JavaScript developers this book is all you need to build highly scalable, robust applications using Express. It takes you step by step through the development of a single page application so you learn empirically.

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Product type Paperback
Published in Nov 2013
Publisher Packt
ISBN-13 9781783282494
Length 148 pages
Edition 1st Edition
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Author (1):
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Andrew Keig Andrew Keig
Author Profile Icon Andrew Keig
Andrew Keig
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Table of Contents (14) Chapters Close

Advanced Express Web Application Development
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
1. Foundations 2. Building a Web API FREE CHAPTER 3. Templating 4. Real-time Communication 5. Security 6. Scaling 7. Production Index

Logging middleware


Express comes with a logger middleware via Connect; it's very useful for debugging an Express application. Let's add it to our Express server ./lib/express/index.js:

var express = require('express')
  , http = require('http')
  , config = require('../configuration')
  , heartbeat = require('../routes/heartbeat')
  , notFound = require('../middleware/notFound')
  , app = express();

app.set('port', config.get('express:port'));
app.use(express.logger({ immediate: true, format: 'dev' }));
app.get('/heartbeat', heartbeat.index);
app.use(notFound.index);

http.createServer(app).listen(app.get('port'));
module.exports = app;

The immediate option will write a log line on request instead of on response. The dev option provides concise output colored by the response status. The logger middleware is placed high in the Express stack in order to log all requests.

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