Worker1 Worker1 - 4 months ago 23
Javascript Question

Node xmpp messages are not sent to correct destination

I'm using node-xmpp server as a chat server for 2 clients:Psi and Spark.I register an account for every client.I want to send from Psi account a message to Spark account.Every time when i send a message from an account the same account receive the message.I want to add friend to my list(i don't know why doesn'w work..probably is not implemented) and to send messages correctly.I'm using node xmpp server/examples/server-and-client.js.Thanks for advices.

Answer

This complete code work pretty well for me:

var xmpp = require('node-xmpp-server');

function generateRoster(jid, name, id, to) {
    // This is a roster request, we create the response node
    var roster = new xmpp.Element('iq', {
        id: id,
        to: to,
        type: 'set'
    });

    roster.c('query', {xmlns: 'jabber:iq:roster', ver: 'ver13'})// We add a children tag `query`, with the two attribute xmlns and ver
        .c('item', { // We add a children 'Item'
            jid: jid, // We send the jid and the name
            name: name,
            subscription: 'both'
        }).c('group').t('Connected Clients'); // We add it to the 'Connected Clients' group

    return roster;
}

var startServer = function (done) {
    // Sets up the server.
    server = new xmpp.C2S.TCPServer({
        port: 5222,
        domain: 'localhost'
    });

    var connectedUsers = [];
    var clientsHandles = {};

    // On connection event. When a client connects.
    server.on('connection', function (client) {
        var userJid = null;
        // That's the way you add mods to a given server.

        // Allows the developer to register the jid against anything they want
        client.on('register', function (opts, cb) {
            console.log('REGISTER');
            console.log(cb);
            cb(false)
        });

        // Allows the developer to authenticate users against anything they want.
        client.on('authenticate', function (opts, cb) {
            //console.log('server:', opts.username, opts.password, 'AUTHENTICATING')
            if (opts.password === 'secret') {
                //console.log('server:', opts.username, 'AUTH OK')
                cb(null, opts)
            }
            else {
                //console.log('server:', opts.username, 'AUTH FAIL')
                cb(false)
            }
        });

        client.on('online', function () {
            userJid = client.jid.user + '@' + client.jid.domain + '/' + client.jid.resource;
            console.log(userJid + 'ONLINE');

            for (var i = 0; i < connectedUsers.length; i++) {
                var myRoster = generateRoster(userJid, userJid, 'myRandomId', connectedUsers[i]);

                if (clientsHandles[connectedUsers[i]]) {
                    clientsHandles[connectedUsers[i]].send(myRoster);
                    console.log("Sending my new infos to ", connectedUsers[i]);
                }
            }

            connectedUsers.push(userJid);
            client.jid.userJid = userJid;
            clientsHandles[userJid] = client;
        });

        // Stanza handling
        client.on('stanza', function (stanza) {
            if (stanza.is('message') && (stanza.attrs.type !== 'error')) {
                if (clientsHandles[stanza.attrs.to]) {
                    clientsHandles[stanza.attrs.to].send(stanza);
                }
            }
            else if (stanza.is('presence')) {
                // We loop through the user list
                for (var j = 0; j < connectedUsers.length; j++) {
                    console.log(stanza.toString());
                    var jid = connectedUsers[j];
                    stanza.to = jid;
                    clientsHandles[jid].send(stanza);
                }
            }
            else if (stanza.is('iq') && stanza.attrs.type == 'get') {
                for (var i = 0; i < stanza.children.length; i++) {
                    if (stanza.children[i].name == 'query' && stanza.children[i].attrs.xmlns == 'jabber:iq:roster') {

                        // We loop through the user list
                        for (var j = 0; j < connectedUsers.length; j++) {

                            var roster = generateRoster(connectedUsers[j], connectedUsers[j], stanza.attrs.id, stanza.attrs.from);
                            client.send(roster); // We send it back to the client
                        }

                    }
                }
                client.send(stanza);
            }
            else {
                client.send(stanza);
            }
        });

        // On Disconnect event. When a client disconnects
        client.on('disconnect', function () {
            if (userJid) {
                console.log(userJid, "DISCONNECTED");
                connectedUsers.splice(connectedUsers.indexOf(userJid), 1);
                delete clientsHandles[userJid];
            }
        });

    });

    server.on('listening', done)
};

startServer(function () {
    console.log("Server running");
});

When a message stanza arrives, I check wether the receiver is connected or not and if so I send the stanza to it.

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