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@dristic /webrtc.js
Last active Sep 20, 2017

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Full code from my WebRTC Data Channel post.
// Fix Vendor Prefixes
var IS_CHROME = !!window.webkitRTCPeerConnection,
RTCPeerConnection,
RTCIceCandidate,
RTCSessionDescription;
if (IS_CHROME) {
RTCPeerConnection = webkitRTCPeerConnection;
RTCIceCandidate = window.RTCIceCandidate;
RTCSessionDescription = window.RTCSessionDescription;
} else {
RTCPeerConnection = mozRTCPeerConnection;
RTCIceCandidate = mozRTCIceCandidate;
RTCSessionDescription = mozRTCSessionDescription;
}
// Signaling Channel (PubNub, Firebase, Socket.io, etc.)
function SignalingChannel(peerConnection) {
// Setup the signaling channel here
this.peerConnection = peerConnection;
}
SignalingChannel.prototype.send = function(message) {
// Send messages using your favorite real-time network
};
SignalingChannel.prototype.onmessage = function(message) {
// If we get a sdp we have to sign and return it
if (message.sdp != null) {
var that = this;
this.peerConnection.setRemoteDescription(new RTCSessionDescription(message.sdp), function () {
that.peerConnection.createAnswer(function (description) {
that.send(description);
});
});
} else {
this.peerConnection.addIceCandidate(new RTCIceCandidate(message.candidate));
}
};
// Create a peer connection object
var connection = new RTCPeerConnection({
iceServers: [
{ 'url': (IS_CHROME ? 'stun:stun.l.google.com:19302' : 'stun:23.21.150.121') }
]
});
// Initiate a signaling channel between two users
var signalingChannel = new SignalingChannel(connection);
// Only one client should initiate the connection, the other client should wait.
function initiateConnection() {
connection.createOffer(function (description) {
signalingChannel.send(description);
});
};
// Firefox does not support unreliable channels at this time
var dataChannel = connection.createDataChannel("my_label", (IS_CHROME ? { reliable: false } : {}));
dataChannel.onmessage = function (event) {
var data = event.data;
console.log("I got data channel message: ", data);
};
dataChannel.onopen = function (event) {
dataChannel.send("Hello World!");
};
// Create a button on the page so only one client initiates the connection.
document.querySelector('#initiate-button').onclick = function (event) {
initiateConnection();
};
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