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 Boolean AddSubscriber(WsConfSubscriber subscriber)
{
bool result = false;
lock (this)
{
if (noOfModifiers++ == 0)
{
hashSetChangeDone.Reset();
}
if (noOfBroadcasters > 0)
{
Monitor.Wait(this);
}
}
try
{
logger.Info(subscribers + ";" + subscriber);
result = subscribers.Add(subscriber);
}
finally
{
lock (this)
{
if (--noOfModifiers == 0)
{
hashSetChangeDone.Set();
}
}
}
return(result);
}
public async Task OnOpen(WsConfSubscriber subscriber)
{
WsConfPubSubState confState;
Boolean substate = false;
if (!channels.TryGetValue(channelName, out confState))
{
confState = channels.GetOrAdd(channelName, new WsConfPubSubState());
}
substate = confState.AddSubscriber(subscriber);
String sendLog = "{\"Action\" : \"open\",\"host\":\" "
+ remoteHost + "\",\"port\": "
+ remotePort + ", \"subscribe\":"
+ (substate ? "true" : "false")
+ ",\"subscount\":" + confState.GetSubscribersCount() + "}";
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();
}
}
logger.Info("OnOpen " + channelName + "-->" + sendLog);
}
public void OnClose(WsConfSubscriber subsciber, WebSocketCloseStatus status)
{
WsConfPubSubState confState;
if (channels.TryGetValue(channelName, out confState))
{
confState.RemoveSubscriber(subsciber);
}
String sendLog = "{\"Action\" : \"close\",\"host\":\" " + remoteHost + "\",\"port\": " + remotePort + ",\"subscount\":" + confState.GetSubscribersCount() + ",\"CloseStatus\": " + status + "}";
logger.Info("OnClose " + channelName + "-->" + sendLog);
}
private async Task HandleWebSocket(WebSocketContext wsContext)
{
const int maxMessageSize = 1024;
byte[] receiveBuffer = new byte[maxMessageSize];
WebSocket subSocket = wsContext.WebSocket;
WsConfSubscriber subscriber = new WsConfSubscriber(subSocket);
await OnOpen(subscriber);
while (subSocket.State == WebSocketState.Open)
{
WebSocketReceiveResult receiveResult = null;
try
{
receiveResult = await subSocket.ReceiveAsync(new ArraySegment <byte>(receiveBuffer), CancellationToken.None);
}
catch (WebSocketException wse)
{
OnClose(subscriber, WebSocketCloseStatus.InvalidMessageType);
logger.Error("Error at ReceiveAsync", wse);
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)
{
logger.Info("onReceiveAsync " + channelName + "--> BytesCount:0");
}
count += receiveResult.Count;
}
//var receivedString = Encoding.UTF8.GetString(receiveBuffer, 0, count);
}
}
String sendLog = "{\"Action\" : \"close\",\"host\":\" " + remoteHost + "\",\"port\": " + remotePort + "}";
logger.Info("outOfWhile " + channelName + "-->" + sendLog);
}
