Book Image

Express Web Application Development

By : Hage Yaaapa
Book Image

Express Web Application Development

By: Hage Yaaapa

Overview of this book

Express is a minimal and flexible node.js web application framework, providing a robust set of features for building single and multi-page, and hybrid web applications. It provides a thin layer of features fundamental to any web application, without obscuring features that developers know and love in node.js. "Express Web Application Development" is a comprehensive guide for those looking to learn how to use the Express web framework for web application development. Starting with the initial setup of the Express web framework, "Express Web Application Development" helps you to understand the fundamentals of the framework. By the end of "Express Web Application Development", you will have acquired enough knowledge and skills to create production-ready Express apps. All of this is made possible by the incremental introduction of more advanced topics, starting from the very essentials. On the way to mastering Express for application development, we teach you the more advanced topics such as routes, views, middleware, forms, sessions, cookies and various other aspects of configuring an Express application. Jade; the recommended HTML template engine, and Stylus; the CSS pre-processor for Express, are covered in detail. Last, but definitely not least, Express Web Application Development also covers practices and setups that are required to make Express apps production-ready.
Table of Contents (15 chapters)
Express Web Application Development
About the Author
About the Reviewers

Handling critical events

All apps are susceptible to crashes and signal terminations. Production-ready apps are supposed to handle these critical events as gracefully and usefully as possible when they can, rather than crash abruptly.

In this section, we will learn how to handle fatal errors and termination signals from our app.

Closing the server

One of the first things to do in the event of something critical is to close the server to new connections, so that we can perform the necessary housekeeping before finally terminating the process.

When we start the server using http.createServer(), the method returns an instance of Node's web server object, which has a method called close() that will stop the server from receiving new requests.


You can read more about the HTTP Server object at

Following is a simple example of using the server's close() method. This app will respond to the first request it receives...