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  • Book Overview & Buying Practical XMPP
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Practical XMPP

Practical XMPP

By : Lloyd Watkin, Steven Watkin, Koelle
3 (2)
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Practical XMPP

Practical XMPP

3 (2)
By: Lloyd Watkin, Steven Watkin, Koelle
Buy this Book

Overview of this book

XMPP (eXtensible Messaging and Presence Protocol) is a messaging protocol that enables communication between two or more devices via the Internet. With this book, developers will learn about the fundamentals of XMPP, be able to work with the core functionality both server-side and in the browser, as well as starting to explore several of the protocol extensions. You will not only have a solid grasp of XMPP and how it works, but will also be able to use the protocol to build real-world applications that utilize the power of XMPP. By the end of this book, you will know more about networking applications in general, and have a good understanding of how to extend XMPP, as well as using it in sample applications.
Table of Contents (11 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. An Introduction to XMPP and Installing Our First Server
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1. An Introduction to XMPP and Installing Our First Server
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What is XMPP?
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Installing our XMPP server
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Summary
2
2. Diving into the Core XMPP Concepts
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2. Diving into the Core XMPP Concepts
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Introducing the Jabber ID
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Basic building blocks of XMPP communication
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Presence overloading
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Chat state notifications
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Summary
3
3. Building a One-on-One Chat Bot - The "Hello World" of XMPP
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3. Building a One-on-One Chat Bot - The "Hello World" of XMPP
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C2S connection life cycle
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Authenticating with a server
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Installing node-xmpp-client
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Building our echo bot
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Telling the server we're online
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Responding to incoming messages
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Extending our echo bot
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Signing off
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Summary
4
4. Talking XMPP in the Browser Using XMPP-FTW
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4. Talking XMPP in the Browser Using XMPP-FTW
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Interacting with XMPP in the browser
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BOSH
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The WebSocket protocol
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Introducing XMPP-FTW
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Talking to our bot from the browser
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Chatting with our XMPP bot
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Login
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Seeing what the chat bot is up to...
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Hello (hello, hello...)! Is there anybody out there?
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Summary
5
5. Building a Multi-User Chat Application
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5. Building a Multi-User Chat Application
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The basics of MUC
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Joining a room
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Discovering MUC
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Configuring our chat room using data forms
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Data forms in XMPP-FTW
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Creating a chat room
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Building with XMPPMUC
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Updating Prosody to provide an MUC service
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Extending our chat bot to work with an MUC
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Writing a browser-based MUC client
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Building the client
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Handling incoming messages
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Summary
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6. Make Your Static Website Real-Time
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6. Make Your Static Website Real-Time
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Are we there yet?
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Interacting with Publish-Subscribe
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Discovery
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Subscribing
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Subscriptions, affiliations, and access models
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Making your website real-time
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Setting up the server
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Lining up our static website
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Let's get real-time...
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Getting real-time
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Taking things further
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Summary
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7. Creating an XMPP Component
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7. Creating an XMPP Component
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Connection flow for components
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Configuring a component in Prosody
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Building our first XMPP component
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Responding to a chat message
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Summary
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8. Building a Basic XMPP-Based Pong Game
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8. Building a Basic XMPP-Based Pong Game
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Overview of Basic XMPP Pong
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Getting Started
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Developing the HTML canvas
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Drawing and updating the game
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Sending and receiving XMPP messages in Pong
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Sending and receiving a Hello message
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Connecting the clients
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Advertising the Pong feature of clients (Client DISCO)
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Issues with a basic implementation
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Summary
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9. Enhancing XMPPong with a Server Component and Custom Messages
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9. Enhancing XMPPong with a Server Component and Custom Messages
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Designing the information flow for XMPPong
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Developing the XMPP component for XMPPong
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Maintaining the ball state in the component
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Handing DISCO#info requests
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Developing the client
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Modifying the browser view
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Running the server and clients
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Summary
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10. Real-World Deployment and XMPP Extensions
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10. Real-World Deployment and XMPP Extensions
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Server Modules
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DNS setup and SRV records
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Server-to-server communications
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XMPP security
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XMPP scalability
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User Registration
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About the XMPP Standards Foundation
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XMPP and the new rise of multi-user chat
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XMPP and the Internet of Things
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XMPP and Universal Plug-n-Play
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XMPP and WebRTC
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The Future of XMPP
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Summary

Introducing XMPP-FTW

Around the autumn of 2012, as the real-time web was really starting to become an important area, members of the XMPP developer community recognized that developer teams were generating a lot of their own proprietary message setups but, more importantly, were making the same mistakes that had already been solved in XMPP over a decade earlier. The problem is that web developers simply saw XMPP and immediately sought simpler solutions.

Most of the issues arose from having to work with XML. It is not a format that is familiar to most web-developers; developers simply had bad experiences with it (remember SOAP?) or WebSockets were not available and BOSH just seemed slow and cumbersome.

The solution was to deliver an alternative interface to XMPP. Naturally, for the Web, this was JSON over a WebSocket. On the surface, this appears to be an easy goal since many people think, incorrectly, that you can cleanly translate back and forth between XML and JSON. Sadly, all existing attempts...

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