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Practical XMPP

You're reading from   Practical XMPP Unleash the power of XMPP in order to build exciting, realtime, federated applications based on open standards in a secure and highly scalable fashion

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Product type Paperback
Published in Sep 2016
Publisher Packt
ISBN-13 9781785287985
Length 250 pages
Edition 1st Edition
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Authors (3):
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Steven Watkin Steven Watkin
Author Profile Icon Steven Watkin
Steven Watkin
David Koelle David Koelle
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David Koelle
Lloyd Watkin Lloyd Watkin
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Lloyd Watkin
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Toc

Table of Contents (11) Chapters Close

Preface 1. An Introduction to XMPP and Installing Our First Server FREE CHAPTER 2. Diving into the Core XMPP Concepts 3. Building a One-on-One Chat Bot - The "Hello World" of XMPP 4. Talking XMPP in the Browser Using XMPP-FTW 5. Building a Multi-User Chat Application 6. Make Your Static Website Real-Time 7. Creating an XMPP Component 8. Building a Basic XMPP-Based Pong Game 9. Enhancing XMPPong with a Server Component and Custom Messages 10. Real-World Deployment and XMPP Extensions

Telling the server we're online


Once the client is connected, we'll need to tell the server that we're online so that it knows to route any stanzas sent to the bare JID (bot@localhost) through to our script. To do this, we'll need to build a stanza using the library that comes as part of node-xmpp-client called Less than XML or ltx.

We can access ltx via the client object we loaded earlier. To send the presence data, we must first be online, so we'll add a function call in that event to send a presence stanza. Our code now becomes:

const Client = require('node-xmpp-client') 
  , ltx = Client.ltx 
 
const options = { 
  jid: 'bot@localhost', 
  password: 'tellnoone' 
} 
const client = new Client(options) 
client.on('online', (connectionDetails) => { 
  console.log('We are connected!') 
  console.log(connectionDetails) 
  sendPresence() 
}) 
 
const sendPresence = () => { 
  var stanza = new ltx.Element('presence...
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