internal void AttachToSession(TcpMapServerSession session)
{
_attachedSession = session;
_cts_wait_upgrade.Cancel();
}
async Task ProcessSocketAsync(Socket socket)
{
//LogMessage("new server conn : " + socket.LocalEndPoint + " , " + socket.RemoteEndPoint);
string sessionid = Guid.NewGuid().ToString();
int tryagainIndex = 0;
TryAgain:
if (!socket.Connected) //this property is not OK .. actually the client has disconnect
{
return;
}
tryagainIndex++;
if (tryagainIndex > 3) //only try 3 times.
{
return;
}
TcpMapServerClient sclient = FindClient();
if (sclient == null)
{
if (DateTime.Now - _lastDisconnectTime < TimeSpan.FromSeconds(8)) //TODO:const connect wait sclient timeout
{
await Task.Delay(500);
goto TryAgain;
}
throw new Exception("no sclient.");
}
TcpMapServerClient presession = null;
try
{
lock (_presessions)
{
if (_presessions.Count != 0)
{
presession = _presessions[0];
_presessions.RemoveAt(0);
}
}
if (presession != null)
{
try
{
await presession.UpgradeSessionAsync(sessionid);
}
catch (Exception x)
{
OnError(x);
LogMessage("Error:ServerWorker presession upgrade failed @" + tryagainIndex + " , " + sessionid);
goto TryAgain;
}
lock (_sessions)
_sessions.Add(presession);
LogMessage("ServerWorker session upgraded @" + tryagainIndex + " , " + sessionid);
}
else
{
await sclient.StartSessionAsync(sessionid);
LogMessage("ServerWorker session created @" + tryagainIndex + " , " + sessionid);
}
}
catch (Exception x)
{
OnError(x);
await Task.Delay(500); //TODO:const...
goto TryAgain;
}
try
{
TcpMapServerSession session = new TcpMapServerSession(socket.CreateStream(), sessionid);
sessionMap.TryAdd(sessionid, session);
LogMessage("Warning: TcpMapServerSession added:" + sessionid);
try
{
if (presession != null)
{
presession.AttachToSession(session);
}
await session.WorkAsync();
}
finally
{
sessionMap.TryRemove(sessionid, out _);
LogMessage("Warning: TcpMapServerSession removed:" + sessionid);
}
}
catch (Exception x)
{
OnError(x);
}
await sclient.CloseSessionAsync(sessionid);
//LogMessage("ServerWorker session closed @" + tryagainIndex);
}