WebRTC PeerJS Text Chat - Connect to multiple peerID at the same time - webrtc

Question

Hi friends I have been working on to connect to multiple peer id for text chat when i connect to single peer alone it is working
but i am getting problem on connecting multiple peerid at the same time
For example for connecting to single peer we will be using this
var conn = peer.connect(peerId);
conn.on('open', function() {
connect(conn);
});
When i want to connect to multiple peer ID
For ex : var peerIDs = [ 'peerid 1', 'peerid 2', 'peerid 3']
I am using loop for this
for(var i=0 ; i < peerIDs.length ; i++){
conn = peer.connect(peerIDs[i]);
conn.on('open', function() {
connect(conn);
});
}
Here is the complete code:
var userId = new Date().getTime();
//Get the ID from the server
var peer = new Peer(userId, {host: 'localhost', port: 3031, path: '/',debug: true });
var conn;
var connections = [];
//to receive id from the server
peer.on('open', function(id){
console.log('the id is' +id);
});
//in case of error
peer.on('error', function(e){
alert(e.message);
})
//Awaits for the connection
peer.on('connection', connect);
function connect(c){
conn = c;
connections[c.peer].on('data', function(data){
var mess = document.createElement('div');
mess.innerHTML = '<span class="peer">' + c.peer + '</span>: ' + data;
angular.element( document.querySelector( '.messages' ) ).append(mess);
});
connections[c.peer].on('close', function(){
alert(c.peer + 'has left the chat');
});
}
//When user clicks the chat button
$scope.chat = function(){
alert('user clicked the connect button');
var peerIDs = [ 'peerid 1', 'peerid 2', 'peerid 3']
for(var i=0 ; i < peerIDs.length ; i++){
var conn = peer.connect(peerIDs[i]);
conn.on('open', function() {
connections.push(c);
connect(conn);
});
}
}
//send message when clicked
$scope.send = function(){
// For each active connection, send the message.
var msg = angular.element( document.querySelector( '#mess' ) ).val();
//Send message to all connected peers
for(var i in connections){
connections[i].send(msg);
}
angular.element( document.querySelector( '.messages' ) ).append('<div><span class="you">You: </span>' + msg
+ '</div>');
}
Can you please give the insight of how to achieve this.Your help will be Greatly appreciated.

Answer 1

To be able to have multi-connections at the same time, you just need to handle multi-connections at the same time.
// Array of remote peers ID and data channel
var remotePeerIds=[],// You need this to link with specific DOM element
connections=[]; // This is where you manage multi-connections
// create a Peer
var peer = new Peer({key: 'YOUR_KEY'}); // You can use your own peerID here
// Get your local peer id
peer.on('open', function(id) {
console.log('My peer ID is: ' + id);
});
// Start connection with other peer - and handle it
getConnect(remotePeerId){
var conn = peer.connect(remotePeerId);
handleConnection(conn);
}
// Ok now you need to handle the received connection too
peer.on('connection',function(conn){
handleConnection(conn);
});
// Handle connection - this is most important part
handleConnection(conn){
remotePeerIds.push(conn.peer); // Add remote peer to list
conn.on('open', function() {
console.log("Connected with peer: "+remotePeerId);
conn.on('data',function(data){
// You can do whatever you want with the data from this connection - this is also the main part
dataHandler(conn,data);
});
conn.on('error',function(){
// handle error
connectionError(conn);
});
conn.on('close',function(){
// Handle connection closed
connectionClose(conn);
});
connections.push(conn);
});
});
}
// So now you have multi-connections. If you want to send a message to all other peer, just using for loop with all the connections
function broadcastMessage(message){
for(var i=0;i<connections.length,i++){
connections[i].send(message);
}
}
// Or if you want to send a message to a specific peer - you need to know his peerid
function privateMessage(remotePeerId,message){
for(var i=0;i<connections.length,i++){
if(connections[i].peer==remotePeerId){
connections[i].send(message);
break;
}
}
}
This is the main part, you need to add some more code for connection handler in case of error and close.
That's it !

Answer 2

#luongnv89 Thanks for your response.
But i am getting problem when i try to connect multiple peerID
For Ex :
// Start connection with other peer - and handle it
function getConnect(remotePeerId){
var conn = peer.connect(remotePeerId);
handleConnection(conn);
}
var peerIDS = ['cttgmy43jy30udi0', 'mhzqhpn8rj4f5hfr'];
for(var i=0 ; i < peerIDS.length ; i++){
getConnect(peerIDS[i]);
}
When i ran the above loop i can able to connect with only the last peerid which i pass in the array in this case it is 'mhzqhpn8rj4f5hfr'
Here i post the console thing
PeerJS: Creating RTCPeerConnection.
peer.min.js:1 PeerJS: Listening for ICE candidates.
peer.min.js:1 PeerJS: Listening for `negotiationneeded`
peer.min.js:1 PeerJS: Listening for data channel
peer.min.js:1 PeerJS: Listening for remote stream
peer.min.js:1 PeerJS: Creating RTCPeerConnection.
peer.min.js:1 PeerJS: Listening for ICE candidates.
peer.min.js:1 PeerJS: Listening for `negotiationneeded`
peer.min.js:1 PeerJS: Listening for data channel
peer.min.js:1 PeerJS: Listening for remote stream
2peer.min.js:1 PeerJS: `negotiationneeded` triggered
peer.min.js:1 PeerJS: Created offer.
peer.min.js:1 PeerJS: Set localDescription: offer for: cttgmy43jy30udi0
peer.min.js:1 PeerJS: Created offer.
peer.min.js:1 PeerJS: Received ICE candidates for: cttgmy43jy30udi0
peer.min.js:1 PeerJS: Set localDescription: offer for: mhzqhpn8rj4f5hfr
peer.min.js:1 PeerJS: Received ICE candidates for: mhzqhpn8rj4f5hfr
peer.min.js:1 PeerJS: Setting remote description RTCSessionDescription {sdp: "v=0
↵o=- 8190108536299128797 2 IN IP4 127.0.0.1
↵s…id:data
↵a=sctpmap:5000 webrtc-datachannel 1024
↵", type: "answer"}
peer.min.js:1 PeerJS: Added ICE candidate for: cttgmy43jy30udi0
peer.min.js:1 PeerJS: Set remoteDescription: ANSWER for: cttgmy43jy30udi0
2peer.min.js:1 PeerJS: Added ICE candidate for: cttgmy43jy30udi0
2peer.min.js:1 PeerJS: Received ICE candidates for: mhzqhpn8rj4f5hfr
peer.min.js:1 PeerJS: Data channel connection success
peer.min.js:1 PeerJS: Setting remote description RTCSessionDescription {sdp: "v=0
↵o=Mozilla-SIPUA-35.0.1 15417 0 IN IP4 0.0.0.0…ap:5000 webrtc-datachannel 1024
↵a=setup:active
↵", type: "answer"}
2peer.min.js:1 PeerJS: Added ICE candidate for: mhzqhpn8rj4f5hfr
peer.min.js:1 PeerJS: Set remoteDescription: ANSWER for: mhzqhpn8rj4f5hfr
peer.min.js:1 PeerJS: Added ICE candidate for: mhzqhpn8rj4f5hfr
peer.min.js:1 PeerJS: Data channel connection success
peer.min.js:1 PeerJS: Added ICE candidate for: mhzqhpn8rj4f5hfr
So what did is to make it work i dont know whether it is the right approach or not...
I just set the delay between connections
var peerIDS = ['cttgmy43jy30udi0', 'mhzqhpn8rj4f5hfr'];
var arrLength = peerIDS.length;
var count = 0;
(function processConnection(){
if(arrLength <= count) return;
getConnect(peerIDS[count]);
count++;
setTimeout(function(){
processConnection()
}, 5000);
})();
And now it is working properly..Can you please tell me whether i am going in a right path or is there anyother better way to accomplish this