Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Node Web Development - Second Edition

You're reading from   Node Web Development - Second Edition JavaScript is no longer just for browsers and this exciting introduction to Node.js will show you how to build data-intensive applications that run in real time. Benefit from an easy, step-by-step approach that really works.

Arrow left icon
Product type Paperback
Published in Jul 2013
Publisher
ISBN-13 9781782163305
Length 248 pages
Edition Edition
Tools
Arrow right icon
Author (1):
Arrow left icon
David Herron David Herron
Author Profile Icon David Herron
David Herron
Arrow right icon
View More author details
Toc

Table of Contents (17) Chapters Close

Node Web Development Second Edition
Credits
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
1. About Node FREE CHAPTER 2. Setting up Node 3. Node Modules 4. HTTP Servers and Clients – A Web Application's First Steps 5. Implementing a Simple Express Application 6. Data Storage and Retrieval 7. Multiuser Authorization, Deployment, Scaling, and Hosting 8. Dynamic Interaction between the Client and Server Application 9. Unit Testing Index

Sending and receiving events with EventEmitters


EventEmitters are one of the core idioms of Node, because many of the core modules are EventEmitters, and also because EventEmitters make an excellent skeleton to implement asynchronous programming on. EventEmitters have nothing to do with web application development, but they are so much a part of the woodwork that you may skip over their existence. It is with the HTTP classes that we will get our first taste of EventEmitters.

In this chapter we'll be working with the HTTPServer and HTTPClient objects. Both of them are subclasses of EventEmitter and rely on it to send events for each step of the HTTP protocol. Understanding EventEmitter will help you understand not only these objects but many other objects in Node.

The EventEmitter object is defined in the events module of Node. Directly using the EventEmitter class means performing require('events'), but this is not required, except for cases where the program needs to be a subclass of EventEmitter...

lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime
Banner background image