// Send RTC message to client
private static async Task SendMessage(RTCMessage msg, WebSocket socket)
{
string jsonMsg = JsonConvert.SerializeObject(msg);
var textBuffer = new ArraySegment <byte>(Encoding.UTF8.GetBytes(jsonMsg));
var ct = CancellationToken.None;
await socket.SendAsync(textBuffer, WebSocketMessageType.Text, true, ct);
}
public async Task SendVideoOffer(RTCMessage message)
{
try {
message.Sender = Context.ConnectionId;
await Clients.Client(message.Target).receiveVideoOffer(message);
} catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
// Disconnected clients watcher and notifier
private async static Task WatchDisconnectedClients()
{
while (true)
{
// Notify other clients
var disconnectNotify = new RTCMessage(MessageDisconnected)
{
Target = disconnectedIds.Take()
};
foreach (var clientCtx in clients.Values)
{
await SendMessage(disconnectNotify, clientCtx.Socket);
}
}
}
// Process incoming message
private async Task ProcessMessage(RTCMessage msg, RTCClientContext client)
{
string[] allowedTypes =
{
MessageInit, MessageOffer, MessageAnswer, MessageIce
};
if (allowedTypes.Contains(msg.Type))
{
switch (msg.Type)
{
case MessageInit:
// Another client is ready
client.IsReady = true;
var readyMsg = new RTCMessage(MessageAvailableClients)
{
Data = clients.Where(kv => kv.Value != client &&
kv.Value.IsReady)
.Select(kv => kv.Key)
.ToArray(),
Target = clients.Single(kv => kv.Value == client).Key
};
await SendMessage(readyMsg, client.Socket);
break;
default:
// Transfer to paired client
var anotherPeer = clients[msg.Target];
// Relay message
msg.Target = clients.Single(kv => kv.Value == client).Key;
await SendMessage(msg, anotherPeer.Socket);
break;
}
}
}
public async Task SendNewIceCandidate(RTCMessage message)
{
message.Sender = Context.ConnectionId;
await Clients.Client(message.Target).SendAsync("ReceiveNewIceCAndidate", message);
}
public async Task SendVideoAnswer(RTCMessage message)
{
message.Sender = Context.ConnectionId;
await Clients.Client(message.Target).SendAsync("ReceiveVideoAnswer", message);
}
