Getting Started with HTML5 WebSocket Programming [Repost]

Develop and deploy your first secure and scalable real-time web application
Overview
Start real-time communication in your web applications
Create a feature-rich WebSocket chat application
Learn the step-by-step configuration of the server and clients
In Detail
WebSockets are capable of bi-directional, full-duplex communication over a persistent TCP connection They provide many benefits compared to the alternatives (for example, long-polling or Comet), such as lower overhead, persistent connections, and low latency. In short, it is the most technically challenging HTML5 feature to implement, but for truly interactive websites, it's a technology worth learning.
Getting Started with HTML5 WebSocket Programming gives you the true power of bi-directional communication, implemented by using the brand new HTML5 WebSocket API. You’ll learn how to configure the server and clients, how to transmit different types of data and how to secure the whole system.
This book will introduce you to the WebSocket world. We start by introducing the WebSocket API, and continue with practical, real-world examples until we can determine how to build multi-functional web apps for any type of device.
You will learn how to configure a web client and a web server that will help you send messages to others using easy-to-use mechanisms. We will also find out how different data types, such as images and videos, can be transferred with little effort. We present additional fallback techniques and solutions for older browsers too. Finally, we will secure our clients from malicious attacks and other threats.
What you will learn from this book
Understand the concepts of the WebSocket API and why it is superior to the existing techniques
Implement a WebSocket client that will connect to a remote server and transmit messages to other clients
Configure a WebSocket server using your existing skills and knowledge
Implement native WebSocket clients for mobile and tablet devices
Support older browsers that do not support HTML5 WebSockets
Approach
Getting Started with HTML5 Websocket Programming takes a tutorial-based approach.
Who this book is written for
This book is for anyone who wants to build high-performance, true, real-time web applications. Being familiar with frontend web development (HTML / XHTML, JavaScript) would be ideal.