Book Image

Practical XMPP

By : Lloyd Watkin, Steven Watkin, Koelle
Book Image

Practical XMPP

By: Lloyd Watkin, Steven Watkin, Koelle

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)
Free Chapter
1
1. An Introduction to XMPP and Installing Our First Server

Let's get real-time...


OK, now that we have our static site set up, its time to start adding real-time components. As we said at the top of this section, we're going to do four things:

  • Connect anonymously to the server
  • Subscribe to the pubsub node
  • Retrieve a page of historical results
  • Tell the server we're online and receive real-time updates

We've already learned about anonymous server connections, so remembering back to Chapter 5, Building a Multi-User Chat (MUC) Application, we will edit the xmpp.js file to read as follows:

$(window.document).ready(function() { 
  var socket = new Primus('//' + window.document.location.host) 
  socket.on('error', function(error) { console.error(error) }) 
  var login = function() { 
    socket.send( 
      'xmpp.login.anonymous', 
      { jid: '@anonymous.localhost' } 
    ) 
    socket.on('xmpp.connection', function(data) { 
      console.log('Connected as', data.jid) 
      /* subscribeToNode() // Not implemented...