private void ReceiveCallback(IAsyncResult result)
{
ConnectionInfo connection = result.AsyncState as ConnectionInfo;
try
{
Socket senderSocket = connection.socket; // socketul de la publisher
SocketError response;
int buffSize = senderSocket.EndReceive(result, out response); // terminam primirea datelor
IPEndPoint remoteIpEndPoint = senderSocket.RemoteEndPoint as IPEndPoint;
if (response == SocketError.Success)
{
byte[] packet = new byte[buffSize]; // alocam memorie pentru packet
Array.Copy(connection.data, packet, packet.Length); // copiem datele din packetul transmis
var data = PacketHandler.Handle(packet); // aflam id-ul si mesajul
if (remoteIpEndPoint.Port != 9001)
{
connection.port = (ushort)remoteIpEndPoint.Port;
if (data.message == "subscribe")
{
string key = data.themeId + "#" + connection.port;
if (!subscribers.TryAdd(key, connection))
{
ConnectionInfo temp;
var j = subscribers.TryRemove(key, out temp);
subscribers.TryAdd(key, connection);
subscribers[key].lostMessages = temp.lostMessages;
}
if (subscribers[key].lostMessages != null && subscribers[key].lostMessages.Any())
{
while (subscribers[key].lostMessages.Any())
{
string message = "";
subscribers[key].lostMessages.TryDequeue(out message);
try
{
subscribers[key].socket.Send(Encoding.ASCII.GetBytes(message));
}
catch (Exception e)
{
Console.WriteLine($"Could not send lostMessage data to {key}. Contact Ernest x_X ...");
}
}
}
}
else if (data.message == "unsubscribe")
{
ConnectionInfo temp;
subscribers.TryRemove(data.themeId + "#" + connection.port, out temp);
}
}
else
{
foreach (var x in subscribers)
{
if (x.Key.Split('#')[0] == data.themeId.ToString())
{
try
{
x.Value.socket.Send(Encoding.ASCII.GetBytes(data.message));
}
catch (Exception e)
{
Console.WriteLine($"Could not send data to {x.Key}. Adding to SendLater...");
x.Value.lostMessages.Enqueue(data.message);
}
}
}
}
}
}
catch (Exception e)
{
Console.WriteLine($"Can't receive data from Client, {e.Message}");
}
finally
{
try
{
connection.socket.BeginReceive(connection.data, 0, connection.data.Length, SocketFlags.None, ReceiveCallback, connection);
//incepem sa primi datele in continuare
}
catch (Exception e)
{
Console.WriteLine($"{e.Message}");
//connection.socket.Close();
}
}
}
