node-xmpp-client/README.md

XMPP Client for node

Node-xmpp is a cute but low level tool, so, here is xmpp client.

IQ are handled with callback, presence and roster is manageable, every xmpp events become a node event. This client tries to be as polite as Psi.

Install

You need the low level node xmpp tools, and colors.

npm install .

Test

Async testing is a sport, you need colors for that :

npm install nodeunit

You have to edit a new file in test/conf.js :

exports.conf = {
  a: {
    jid: 'andre@gmail.com',
    password: '42',
    color: 'red',
    host: 'talk.google.com'
  },
  b: {
    jid: 'bob@jabber.org',
    password: 'beuha'
  }
}

Then, you can launch test :

node test/test.js

API

Client handle all the xmpp stack with object, callback, event and handlers. All in async.

Client

The first object is the client :

var c = new Client({
  jid: 'bob@jabber.org',
  password: 'beuha'
}, function() {
    sys.debug("I'm connected");
});

You instiante it with xmpp params and callback, tirggered when connection is done, and roster fetched. All your work should be inside the callback, outside, you don't know your state.

The client throw events :

• presence
• presence:error
• message

And some attributes are available :

• presences
• roster

Bytestreams XEP-00065

Outbound bytestreams are support with either direct connection or the xmpp server proxy.

This depends on (node-hash)[https://github.com/Marak/node_hash].

Creating a bytestream server

var s5bServer	= new BytestreamServer(client);

Create a bew bytestream request

var data	= "abcde";
new Bytestream(s5bServer, {
	name: "filename.txt",
	mimeType: "plain/text",
	length: data.size,
	desc: "Text File Transfer",
	data: data
	}
}, stanza.attrs.from, stanza.attrs.id);

data can also be a function:

data: function(stream) {
	fs.readFile("/path/to/file", function (err, data) {
		if (!err) {
			stream.write(data, "ascii");
		}
	});
}

The following configuration keys are used:

// Proxy mediated S5B settings
proxyJid:			"proxy.example.tld",
proxyHost:			"127.0.0.1",
proxyPort:			7777,
// Direct S5B settings
s5bHost:			"proxy.example.tld",
s5bPort:			8010,

IQ

Iq is handled quietly. You can ask someone with a callback, for the response.

var jabber = this;
this.iq(new xmpp.Element('query', {xmlns: 'jabber:iq:roster'}), function(iq) {
	iq.getChild('query', 'jabber:iq:roster').children.forEach(function(child) {
		//iterating over evrybody
		sys.debug(child.attrs.jid);
	});
});

Answering a distant iq is handled with an handler. Default object handles :

• http://jabber.org/protocol/disco#info :discovery
• jabber:iq:last : last action
• jabber:iq:version : client version

Here is an example :

var jabber = this;
this.registerIqHandler('jabber:iq:last', function(stanza) {
	jabber.resultIq(stanza, new xmpp.Element('query', {
		xmlns: 'jabber:iq:last', seconds:'1'})
		.tree()
	);
});

Not handled iq throws an event : iq:unknow

Room

Just like Client, room is created with a callback, triggered when presence is return from the server.

this.room('beuha', function(status) {

});

Events :

• presence
• message

Available attributes :

• affiliation
• role

PubSub

Pubsub support is experimental for now.