this demo cant share screen between 3 or more computer

[gaecom]

https://www.webrtc-experiment.com/RTCMultiConnection/screen-sharing.html

[gaecom]

this demo could run successfully between two computer browser. But when i open two browsers in computer A and visit this link ,then i visit this link in another computer B browser ,the computer B browser cant view the shared screen.

[muaz-khan]

@gaecom Can you share console-logs for the browser unable to view the shared screen?

On second system; you're able to see View His Screen button?

[gaecom]

i use socket.io over node.

the problem is: i could view the screen in the second system,on the third system i can see view screen button,but i cant see the screen after i clicked button.

i change the javascript in index.html to the following:

   var server = location.protocol+"//"+location.host+"/";

        var onMessageCallbacks = {};
        var currentUserUUID = Math.round(Math.random() * 60535) + 5000;
        var channel =  decodeURI(location.hash).split("@@")[0].slice("1");

        io.connect(server,{secure: true}).emit('new-channel', {
            channel: channel,
            sender: currentUserUUID
        });

        var config = {
            openSocket:function (config) {
                console.log("channel",channel);
                var socketio = io.connect(server+channel);

                socketio.on('message', function(data) {
                    if(data.sender == currentUserUUID) return;

                    if (onMessageCallbacks[data.channel]) {
                        onMessageCallbacks[data.channel](data.message);
                    };
                });
                onMessageCallbacks[channel] = config.onmessage;

                if (config.onopen) setTimeout(config.onopen, 1000);
                return {
                    send: function (message) {
                        socketio.emit('message', {
                            sender: currentUserUUID,
                            channel: channel,
                            message: message
                        });
                    },
                    channel: channel
                };
            },

[gaecom]

my server code is your node server code copy.

[muaz-khan]

Are you using RTCMultiConnection for screen sharing?

• https://www.webrtc-experiment.com/RTCMultiConnection/screen-sharing.html

You must be overriding openSignalingChannel instead of openSocket.

• https://github.com/muaz-khan/WebRTC-Experiment/tree/master/socketio-over-nodejs#how-to-use

You can use this single-socket snippet as well:

• https://github.com/muaz-khan/WebRTC-Experiment/blob/master/Signaling.md#opensignalingchannel-for-rtcmulticonnectionjs-and-datachaneljs-client-side-code

Above firebase-based demo is also not working for you?

You can try MultiRTC Demo to share screen among multiple users.

If you used addStream method; then RTCMultiConnection will auto renegotiate streams with new users.

Did you try plugin-free screen sharing experiment as well?

• https://www.webrtc-experiment.com/Pluginfree-Screen-Sharing/

[gaecom]

many thanks for your reply.

i've tried RTCMultiConnection one way screen demo with link https://www.webrtc-experiment.com/RTCMultiConnection/OneWay-Screen-TwoWay-Audio.html.

if i defined SIGNALING_SERVER = 'https://webrtc-signaling.nodejitsu.com:443/',the demo works. if i defined SIGNALING_SERVER = 'https://w.cc:443/ which is my node server ,it failed. could your tell me where is webrtc-signaling.nodejitsu.com:443 source code.

the following code is my current node server code.

var fs = require('fs');
var options = {
    key: fs.readFileSync('w.cc.key'),
    cert: fs.readFileSync('w.cc.cert')
};
var _ = require('lodash-node');
var express = require('express');
var https = require('https');
var app = express(),
    server = https.createServer(options,app),
    io = require('socket.io').listen(server,{ log: false });

process.env.NODE_TLS_REJECT_UNAUTHORIZED = '0';
//io.configure('production', function(){
//    io.enable('browser client etag');
//    io.set('log level', 1);
//
//
//});

app.configure(function () {
    var hourMs = 1000 * 60 * 60;
    app.use(express.static('static', {
        maxAge: hourMs
    }));
    app.use(express.directory('static'));
    app.use(express.errorHandler());
});

server.listen(8443);

// ----------------------------------socket.io

var channels = {};

// sometimes it helps!
// io.set('transports', ['xhr-polling']);

io.sockets.on('connection', function (socket) {
    console.log("connection");
    var initiatorChannel = '';
    if (!io.isConnected) {
        io.isConnected = true;
    }

    socket.on('new-channel', function (data) {
        if (!channels[data.channel]) {
            initiatorChannel = data.channel;
        }

        channels[data.channel] = data.channel;
        onNewNamespace(data.channel, data.sender);
    });

    socket.on('presence', function (channel) {
        var isChannelPresent = !! channels[channel];
        socket.emit('presence', isChannelPresent);
    });

    socket.on('disconnect', function (channel) {
        if (initiatorChannel) {
            delete channels[initiatorChannel];
        }
    });
});

function onNewNamespace(channel, sender) {
    io.of('/' + channel).on('connection', function (socket) {
        if (io.isConnected) {
            io.isConnected = false;
            socket.emit('connect', true);
        }

        socket.on('message', function (data) {
            if (data.sender == sender)
                socket.broadcast.emit('message', data.data);
        });
    });
}

[gaecom]

i change my node server code to the following and it works now.thank you very much.

var channels = {};

// sometimes it helps!
// io.set('transports', ['xhr-polling']);

var fs = require('fs');
var options = {
    key: fs.readFileSync('w.cc.key'),
    cert: fs.readFileSync('w.cc.cert')
};
var app = require('express')(),
    server = require('https').createServer(options, app),
    io = require('socket.io').listen(server);
server.listen(8443);

io.sockets.on('connection', function (socket) {
    if (!io.connected) io.connected = true;

    socket.on('new-channel', function (data) {
        onNewNamespace(data.channel, data.sender);
    });
});

function onNewNamespace(channel, sender) {
    io.of('/' + channel).on('connection', function (socket) {
        if (io.isConnected) {
            io.isConnected = false;
            socket.emit('connect', true);
        }

        socket.on('message', function (data) {
            if (data.sender == sender) socket.broadcast.emit('message', data.data);
        });
    });
}