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

Ensuring uptime

We have seen that if a worker process crashes, a new one can be forked by the master process, while the remaining workers can handle the current requests. But what happens when the master process itself crashes?

Uptime concerns are a unique aspect of Node apps, but with proper knowledge and the right tools this concern can be addressed to satisfaction.

Let's look at two popular tools for ensuring Express apps are up and running, with as little downtime as possible.


Ensuring a Node app is restarted when it goes down can easily be accomplished with the help of a Node package called forever.

Install forever as global module, so that we can use it as a command-line tool:

$ npm install forever -g

After forever is installed, type forever --help at the command line to see the various options and commands.

Here is a list of the most common commands to help you get started:



$ forever start app.js

Starts app.js in the background and restarts it if it crashes...