public Boolean AddSubscriber(WsConfSubscriber subscriber)
{
bool result = false;
lock (this)
{
if (noOfModifiers++ == 0)
{
hashSetChangeDone.Reset();
}
if (noOfBroadcasters > 0)
{
Monitor.Wait(this);
}
}
try
{
result = subscribers.Add(subscriber);
}
finally
{
lock (this)
{
if (--noOfModifiers == 0)
{
hashSetChangeDone.Set();
}
}
}
return(result);
}
public void RemoveSubscriber(WsConfSubscriber subscriber)
{
lock (this)
{
if (noOfModifiers++ == 0)
{
hashSetChangeDone.Reset();
}
if (noOfBroadcasters > 0)
{
Monitor.Wait(this);
}
}
try
{
subscribers.Remove(subscriber);
if (disposedSubs != null)
{
disposedSubs.Remove(subscriber);
}
}
finally
{
lock (this)
{
if (--noOfModifiers == 0)
{
hashSetChangeDone.Set();
}
}
}
}
public void OnClose(WsConfSubscriber subsciber, WebSocketCloseStatus status)
{
WsConfPubSubState confState;
if (channels.TryGetValue(channelName, out confState))
{
confState.RemoveSubscriber(subsciber);
}
}
public async Task OnOpen(WsConfSubscriber subscriber)
{
WsConfPubSubState confState;
Boolean substate = false;
if (!channels.TryGetValue(channelName, out confState))
{
//add from databse
confState = channels.GetOrAdd(channelName, new WsConfPubSubState(channelName));
}
substate = confState.AddSubscriber(subscriber);
string sendLog = "{\"Message\":\"Success Connected\"}";
ArraySegment<byte> welcomeBuffer = new ArraySegment<byte>(Encoding.UTF8.GetBytes(sendLog));
Boolean gotSignal = false;
try
{
gotSignal = subscriber.autoREvent.WaitOne();
//await subscriber.subSocket.SendAsync(welcomeBuffer, WebSocketMessageType.Text, true, CancellationToken.None);
}
finally
{
if (gotSignal) subscriber.autoREvent.Set();
}
}
private async Task HandleWebSocket(WebSocketContext wsContext)
{
const int maxMessageSize = 102400;
byte[] receiveBuffer = new byte[maxMessageSize];
WebSocket subSocket = wsContext.WebSocket;
WsConfSubscriber subscriber = new WsConfSubscriber(subSocket);
await OnOpen(subscriber);
while (true)
{
WebSocketReceiveResult receiveResult = null;
try
{
receiveResult = await subSocket.ReceiveAsync(new ArraySegment<byte>(receiveBuffer), CancellationToken.None);
}
catch (WebSocketException wse)
{
OnClose(subscriber, WebSocketCloseStatus.InvalidMessageType);
break;
}
if (receiveResult.MessageType == WebSocketMessageType.Close)
{
OnClose(subscriber, receiveResult.CloseStatus.Value);
await subSocket.CloseOutputAsync(WebSocketCloseStatus.NormalClosure, string.Empty, CancellationToken.None);
}
else if (receiveResult.MessageType == WebSocketMessageType.Binary)
{
OnClose(subscriber, WebSocketCloseStatus.InvalidMessageType);
await subSocket.CloseAsync(WebSocketCloseStatus.InvalidMessageType, "Binary frame not allowed", CancellationToken.None);
}
else
{
int count = receiveResult.Count;
while (receiveResult.EndOfMessage == false)
{
if (count >= maxMessageSize)
{
string closeMessage = string.Format("Max message size: {0} bytes.", maxMessageSize);
OnClose(subscriber, WebSocketCloseStatus.MessageTooBig);
await subSocket.CloseAsync(WebSocketCloseStatus.MessageTooBig, closeMessage, CancellationToken.None);
return;
}
receiveResult = await subSocket.ReceiveAsync(new ArraySegment<byte>(receiveBuffer, count, maxMessageSize - count), CancellationToken.None);
if (receiveResult.Count == 0)
{
}
count += receiveResult.Count;
}
//var receivedString = Encoding.UTF8.GetString(receiveBuffer, 0, count);
}
}
//WebSocket socket = context.WebSocket;
//while (true)
//{
// ArraySegment<byte> buffer = new ArraySegment<byte>(new byte[1024]);
// WebSocketReceiveResult result = await socket.ReceiveAsync(
// buffer, CancellationToken.None);
// if (socket.State == WebSocketState.Open)
// {
// string userMessage = Encoding.UTF8.GetString(
// buffer.Array, 0, result.Count);
// userMessage = "You sent: " + userMessage + " at " +
// DateTime.Now.ToLongTimeString();
// buffer = new ArraySegment<byte>(
// Encoding.UTF8.GetBytes(userMessage));
// await socket.SendAsync(buffer, WebSocketMessageType.Text, true, CancellationToken.None);
// }
// else
// {
// break;
// }
//}
}
