Book Image

Practical XMPP

By : Steven Watkin, David Koelle
Book Image

Practical XMPP

By: Steven Watkin, David 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 (16 chapters)
Practical XMPP
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Free Chapter
1
An Introduction to XMPP and Installing Our First Server

Sending and receiving a Hello message


The first thing the client needs to do is create a connection, then send a Hello message, so that the opponent player. This will let us populate the opponentJid member variable, so we have someone to play against and address the paddle updates to. The connect function will be called when we press the button on the webpage to connect, and it will call the sendHello function:

window.connect = function() {
    var options = {
      jid: document.getElementById('username').value,
      password: document.getElementById('password').value
    }
  socket.send('xmpp.login', options)
  socket.once('xmpp.connection', function(connectionDetails) {
      console.log(options.jid + ' is connected!')
      console.log(connectionDetails)
      var jid = connectionDetails.jid.user + ‘@’ +
        onnectionDetails.jid.domain + ‘/’ + connectionDetails.jid.resource
      alert(‘You are connected as ‘ + jid +
  ...