forked from xmppjs/xmpp.js
/
client.js
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client.js
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var EventEmitter = require('events').EventEmitter;
var Connection = require('./connection');
var BOSH = require('./bosh');
var WebSockets = require('./websockets');
var JID = require('./jid').JID;
var ltx = require('ltx');
var sasl = require('./sasl');
var util = require('util');
try {
var SRV = require('./srv');
} catch (e) { }
var NS_CLIENT = 'jabber:client';
var NS_REGISTER = 'jabber:iq:register';
var NS_XMPP_SASL = 'urn:ietf:params:xml:ns:xmpp-sasl';
var NS_XMPP_BIND = 'urn:ietf:params:xml:ns:xmpp-bind';
var NS_XMPP_SESSION = 'urn:ietf:params:xml:ns:xmpp-session';
var STATE_PREAUTH = 0,
STATE_AUTH = 1,
STATE_AUTHED = 2,
STATE_BIND = 3,
STATE_SESSION = 4,
STATE_ONLINE = 5;
var IQID_SESSION = 'sess',
IQID_BIND = 'bind';
/**
* params object:
* jid: String (required)
* password: String (required)
* host: String (optional)
* port: Number (optional)
* reconnect: Boolean (optional)
* register: Boolean (option) - register account before authentication
*
* Example:
* var cl = new xmpp.Client({
* jid: "me@example.com",
* password: "secret"
* });
* var aceboo = new xmpp.Client({
* jid: '-' + fbUID + '@chat.facebook.com',
* api_key: '54321', // api key of your facebook app
* access_token: 'abcdefg', // user access token
* host: 'chat.facebook.com',
* });
*/
function Client(params) {
var self = this;
EventEmitter.call(this);
if (typeof params.jid == 'string')
this.jid = new JID(params.jid);
else
this.jid = params.jid;
this.password = params.password;
this.preferredSaslMechanism = params.preferredSaslMechanism;
this.api_key = params.api_key;
this.access_token = params.access_token;
this.register = params.register;
this.state = STATE_PREAUTH;
delete this.did_bind;
delete this.did_session;
if (params.websocketsURL) {
this.connection = new WebSockets.WSConnection(params.websocketsURL);
this.connection.on('connected', function() {
self.connection.startParser();
self.connection.startStream();
});
} else if (params.boshURL) {
this.connection = new BOSH.BOSHConnection({
jid: this.jid,
boshURL: params.boshURL
});
} else {
this.connection = new Connection.Connection();
var connect = function() {
self.state = STATE_PREAUTH;
delete self.did_bind;
delete self.did_session;
if (params.host) {
self.connection.socket.connect(params.port || 5222, params.host);
self.connection.socket.on('connect', function() {
self.connection.startParser();
self.connection.startStream();
});
} else if (!SRV) {
throw "Cannot load SRV";
} else {
var attempt = SRV.connect(self.connection.socket,
['_xmpp-client._tcp'], self.jid.domain, 5222);
attempt.addListener('connect', function() {
self.connection.startParser();
self.connection.startStream();
});
attempt.addListener('error', function(e) {
self.emit('error', e);
});
}
};
if (params.reconnect)
self.reconnect = connect;
connect();
}
this.connection.xmlns[''] = NS_CLIENT;
this.connection.xmppVersion = "1.0";
this.connection.streamTo = this.jid.domain;
this.connection.addListener('rawStanza', this.onRawStanza.bind(this));
this.connection.addListener('end', function() {
self.state = STATE_PREAUTH;
self.emit('offline');
});
}
util.inherits(Client, EventEmitter);
exports.Client = Client;
Client.prototype.send = function(stanza) {
this.connection.send(stanza);
};
Client.prototype.end = function() {
this.connection.end();
};
Client.prototype.onRawStanza = function(stanza) {
/* Actually, we shouldn't wait for <stream:features/> if
this.streamAttrs.version is missing, but who uses pre-XMPP-1.0
these days anyway? */
if (this.state != STATE_ONLINE &&
stanza.is('features', Connection.NS_STREAM)) {
this.streamFeatures = stanza;
this.useFeatures();
} else if (this.state == STATE_AUTH) {
if (stanza.is('challenge', NS_XMPP_SASL)) {
var challengeMsg = decode64(stanza.getText());
var responseMsg = encode64(this.mech.challenge(challengeMsg));
this.send(new ltx.Element('response',
{ xmlns: NS_XMPP_SASL
}).t(responseMsg));
} else if (stanza.is('success', NS_XMPP_SASL)) {
this.mech = null;
this.state = STATE_AUTHED;
this.connection.startParser();
this.connection.startStream();
} else {
this.emit('error', 'XMPP authentication failure');
}
} else if (this.state == STATE_BIND &&
stanza.is('iq') &&
stanza.attrs.id == IQID_BIND) {
if (stanza.attrs.type == 'result') {
this.state = STATE_AUTHED;
this.did_bind = true;
var bindEl = stanza.getChild('bind', NS_XMPP_BIND);
if (bindEl && bindEl.getChild('jid')) {
this.jid = new JID(bindEl.getChild('jid').getText());
}
/* no stream restart, but next feature */
this.useFeatures();
} else {
this.emit('error', 'Cannot bind resource');
}
} else if (this.state == STATE_SESSION &&
stanza.is('iq') &&
stanza.attrs.id == IQID_SESSION) {
if (stanza.attrs.type == 'result') {
this.state = STATE_AUTHED;
this.did_session = true;
/* no stream restart, but next feature (most probably
we'll go online next) */
this.useFeatures();
} else {
this.emit('error', 'Cannot bind resource');
}
} else if (stanza.name == 'stream:error') {
this.emit('error', stanza);
} else if (this.state == STATE_ONLINE) {
this.emit('stanza', stanza);
}
};
/**
* Either we just received <stream:features/>, or we just enabled a
* feature and are looking for the next.
*/
Client.prototype.useFeatures = function() {
if (this.state == STATE_PREAUTH &&
this.register) {
delete this.register;
this.doRegister();
} else if (this.state == STATE_PREAUTH &&
this.streamFeatures.getChild('mechanisms', NS_XMPP_SASL)) {
this.state = STATE_AUTH;
var offeredMechs = this.streamFeatures.
getChild('mechanisms', NS_XMPP_SASL).
getChildren('mechanism', NS_XMPP_SASL).
map(function(el) { return el.getText(); });
this.mech = sasl.selectMechanism(offeredMechs, this.preferredSaslMechanism);
if (this.mech) {
this.mech.authzid = this.jid.bare().toString();
this.mech.authcid = this.jid.user;
this.mech.password = this.password;
this.mech.api_key = this.api_key;
this.mech.access_token = this.access_token;
this.mech.realm = this.jid.domain; // anything?
this.mech.digest_uri = "xmpp/" + this.jid.domain;
var authMsg = encode64(this.mech.auth());
this.send(new ltx.Element('auth',
{ xmlns: NS_XMPP_SASL,
mechanism: this.mech.name
}).t(authMsg));
} else {
this.emit('error', 'No usable SASL mechanism');
}
} else if (this.state == STATE_AUTHED &&
!this.did_bind &&
this.streamFeatures.getChild('bind', NS_XMPP_BIND)) {
this.state = STATE_BIND;
var bindEl = new ltx.Element('iq',
{ type: 'set',
id: IQID_BIND
}).c('bind',
{ xmlns: NS_XMPP_BIND
});
if (this.jid.resource)
bindEl.c('resource').t(this.jid.resource);
this.send(bindEl);
} else if (this.state == STATE_AUTHED &&
!this.did_session &&
this.streamFeatures.getChild('session', NS_XMPP_SESSION)) {
this.state = STATE_SESSION;
this.send(new ltx.Element('iq',
{ type: 'set',
to: this.jid.domain,
id: IQID_SESSION
}).c('session',
{ xmlns: NS_XMPP_SESSION
}));
} else if (this.state == STATE_AUTHED) {
/* Ok, we're authenticated and all features have been
processed */
this.state = STATE_ONLINE;
this.emit('online');
}
};
Client.prototype.doRegister = function() {
var id = "register" + Math.ceil(Math.random() * 99999);
var iq = new ltx.Element('iq', { type: 'set',
id: id,
to: this.jid.domain
}).
c('query', { xmlns: NS_REGISTER }).
c('username').t(this.jid.user).up().
c('password').t(this.password);
this.send(iq);
var that = this;
var onReply = function(reply) {
if (reply.is('iq') && reply.attrs.id === id) {
that.removeListener('rawStanza', onReply);
if (reply.attrs.type === 'result') {
/* Registration successful, proceed to auth */
that.useFeatures();
} else {
that.emit('error', new Error("Registration error"));
}
}
};
this.on('rawStanza', onReply);
};
var decode64, encode64, Buffer;
if (typeof btoa === 'function') {
decode64 = function(encoded) {
return atob(encoded);
};
} else {
Buffer = require('buffer').Buffer;
decode64 = function(encoded) {
return (new Buffer(encoded, 'base64')).toString('utf8');
};
}
if (typeof atob === 'function') {
encode64 = function(decoded) {
console.log("encode64", decoded, btoa(decoded));
return btoa(decoded);
};
} else {
Buffer = require('buffer').Buffer;
encode64 = function(decoded) {
return (new Buffer(decoded, 'utf8')).toString('base64');
};
}