public async override Task <WebsocketSessionPeer> JoinSession(HttpContext context, string sessionType, string sessionKey)
{
WebsocketSession targetSession = GetSessionByKey(sessionKey);
if (targetSession == null)
{
targetSession = this.CreateSession(sessionType, sessionKey);
}
if (targetSession.GetPeers().Count > 0)
{
throw new Exception("Unable to join Progress session that already has a subscriber.");
}
WebSocket socket = await context.WebSockets.AcceptWebSocketAsync();
WebsocketSessionPeer peer = targetSession.AddPeer(socket);
targetSession.SetAttribute("hostId", peer.Token.PeerId);
// alert requester of their own token
WebsocketSessionPeerToken hostToken = peer.Token;
WebsocketSessionGreeting greeting = new WebsocketSessionGreeting {
SessionKey = sessionKey, HostToken = hostToken, Token = peer.Token
};
WebsocketSessionMessageResponse greetingResponse = CreateWebsocketResponseMessage(WebsocketSessionMessageType.Greeting, greeting);
SendMessage(peer, greetingResponse);
return(peer);
}
public virtual async Task <WebsocketSessionPeer> JoinSession(HttpContext context, string sessionType, string sessionKey)
{
WebsocketSession targetSession = GetSessionByKey(sessionKey);
if (targetSession == null)
{
targetSession = this.CreateSession(sessionType, sessionKey);
}
WebSocket socket = await context.WebSockets.AcceptWebSocketAsync();
WebsocketSessionPeer sessionSocket = targetSession.AddPeer(socket);
string hostId = sessionSocket.Token.PeerId;
if (targetSession.GetPeers().Count == 1)
{
targetSession.SetAttribute("hostId", hostId);
}
else
{
hostId = targetSession.GetAttributeValue <string>("hostId");
}
// alert requester of their own token, the hosts token and other existing peers
WebsocketSessionPeerToken hostToken = targetSession.GetPeerById(hostId).Token;
WebsocketSessionPeerToken[] participants = targetSession.GetPeers().Where(pair => pair.Value.Token.PeerId != sessionSocket.Token.PeerId).Select(pair => pair.Value.Token).ToArray();
WebsocketSessionGreeting greeting = new WebsocketSessionGreeting {
SessionKey = sessionKey, HostToken = hostToken, Token = sessionSocket.Token, Peers = participants
};
WebsocketSessionMessageResponse greetingResponse = CreateWebsocketResponseMessage(WebsocketSessionMessageType.Greeting, greeting);
SendMessage(sessionSocket, greetingResponse);
return(sessionSocket);
}
public virtual async Task SendBinaryToPeers(string sessionKey, WebSocket socket, ArraySegment <byte> buffer)
{
WebsocketSession session = this.GetSessionByKey(sessionKey);
if (session == null)
{
throw new Exception("Unknown Session requested: " + sessionKey);
}
foreach (var pair in session.GetPeers())
{
if (pair.Value.Socket != socket && pair.Value.Socket.State == WebSocketState.Open)
{
await SendBinary(pair.Value.Socket, buffer);
}
}
}
public virtual async Task SendMessageToPeers(string sessionKey, WebSocket socket, string message)
{
WebsocketSession session = this.GetSessionByKey(sessionKey);
if (session == null)
{
throw new Exception("Unknown Session requested: " + sessionKey);
}
foreach (var pair in session.GetPeers())
{
if (pair.Value.Socket != socket && pair.Value.Socket.State == WebSocketState.Open)
{
await SendMessage(pair.Value.Socket, message);
}
}
}
public async Task SendMessage(string sessionKey, IEnumerable <string> socketIds, string message)
{
WebsocketSession session = this.GetSessionByKey(sessionKey);
if (session == null)
{
throw new Exception("Unknown Session requested: " + sessionKey);
}
foreach (var pair in session.GetPeers())
{
if (socketIds.Contains(pair.Key) && pair.Value.Socket.State == WebSocketState.Open)
{
await SendMessage(pair.Value.Socket, message);
}
}
}
public async Task SendMessage(string sessionKey, IEnumerable <WebSocket> sockets, string message)
{
List <Task> tasks = new List <Task>();
WebsocketSession session = this.GetSessionByKey(sessionKey);
if (session == null)
{
throw new Exception("Unknown Session requested: " + sessionKey);
}
foreach (var pair in session.GetPeers())
{
if (sockets.Contains(pair.Value.Socket) && pair.Value.Socket.State == WebSocketState.Open)
{
tasks.Add(SendMessage(pair.Value.Socket, message));
}
}
await Task.WhenAll(tasks);
}