WebSocket by Lombardi, Andrew -- Read -- Imperial Library of Trantor

Index

Preface

Who Should Read This Book Goals of This Book Navigating This Book Conventions Used in This Book Using Code Examples Safari® Books Online How to Contact Us Acknowledgments

1. Quick Start

Getting Node and npm

Installing on Windows Installing on OS X Installing on Linux

Hello, World! Example Why WebSocket? Summary

2. WebSocket API

Initializing Stock Example UI WebSocket Events

Event: Open Event: Message Event: Error Event: PING/PONG Event: Close

WebSocket Methods

Method: Send Method: Close

WebSocket Attributes

Attribute: readyState Attribute: bufferedAmount Attribute: protocol

Stock Example Server Testing for WebSocket Support Summary

3. Bidirectional Chat

Long Polling Writing a Basic Chat Application WebSocket Client Client Identity Events and Notifications The Server The Client Summary

4. STOMP over WebSocket

Implementing STOMP

Getting Connected Connecting via the Server

Setting Up RabbitMQ Connecting the Server to RabbitMQ

The Stock Price Daemon

Processing STOMP Requests Client Using RabbitMQ with Web-Stomp

STOMP Client for Web and Node.js Installing the Web-Stomp Plug-in Echo Client for Web-Stomp

Summary

5. WebSocket Compatibility

SockJS

SockJS Chat Server SockJS Chat Client

Socket.IO

Adobe Flash Socket Connecting Socket.IO Chat Server Socket.IO Chat Client

Pusher.com

Channels Events Pusher Chat Server Pusher Chat Client Don’t Forget: Pusher Is a Commercial Solution

Reverse Proxy Summary

6. WebSocket Security

TLS and WebSocket

Generating a Self-Signed Certificate Installing on Windows Installing on OS X Installing on Linux Setting up WebSocket over TLS WebSocket Server over TLS Example

Origin-Based Security Model

Clickjacking X-Frame-Options for Framebusting

Denial of Service Frame Masking Validating Clients

Setting Up Dependencies and Inits Listening for Web Requests WebSocket Server

Summary

7. Debugging and Tools

The Handshake

The Server The Client Download and Configure ZAP

WebSocket Secure to the Rescue Validating the Handshake Inspecting Frames

Masked Payloads

Closing Connection Summary

8. WebSocket Protocol

HTTP 0.9—The Web Is Born HTTP 1.0 and 1.1 WebSocket Open Handshake

Sec-WebSocket-Key and Sec-WebSocket-Accept

Generating the Sec-WebSocket-Key Responding with the Sec-WebSocket-Accept

WebSocket HTTP Headers

WebSocket Frame

Fin Bit Frame Opcodes Masking Length Fragmentation

WebSocket Close Handshake WebSocket Subprotocols WebSocket Extensions Alternate Server Implementations Summary

Index

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