private void AcceptCallback(IAsyncResult result)
{
ConnectedSocket connected = new ConnectedSocket();
try
{
var socket = (Socket) result.AsyncState;
connected.Socket = socket.EndAccept(result);
var key = connected.Socket.Handle.ToInt32();
if (_clients.ContainsKey(key))
{
Logger.Debug("Socket already connected");
return;
}
connected.Buffer = new byte[1024];
connected.MessageStream = new MemoryStream();
connected.Stream = new NetworkStream(connected.Socket);
_clients.TryAdd(key, connected);
connected.Socket.BeginReceive(connected.Buffer, 0, 5, SocketFlags.None, ReceiveSizeCallback, connected);
}
catch (SocketException e)
{
HandleSocketException(connected, e);
}
catch (Exception e)
{
HandleException(connected, e);
}
finally
{
_serverSocket.BeginAccept(AcceptCallback, result.AsyncState);
}
}
public CommandTask(Action<string, ConnectedSocket> onExecutionEnd, string text, ConnectedSocket client)
{
_onExecutionEnd = onExecutionEnd;
_command = text;
_client = client;
}
private void TryReadSize(int read, ConnectedSocket connected)
{
if (read == 0)
{
CloseConnection(connected);
return;
}
var codedInputStream = CodedInputStream.CreateInstance(connected.Buffer, 0, 5);
var length = codedInputStream.ReadRawVarint32();
var intSize = CodedOutputStream.ComputeRawVarint32Size(length);
connected.ReadLeft = (int) (length + intSize - 5);
connected.MessageStream.Write(connected.Buffer, intSize, 5 - intSize);
connected.Socket.BeginReceive(
connected.Buffer,
0,
Math.Min(connected.ReadLeft, connected.Buffer.Length),
SocketFlags.None,
ReceiveMessageCallback,
connected);
}
private void ParseAndDoWork(ConnectedSocket connected)
{
var message =
Message.ParseFrom(CodedInputStream.CreateInstance(connected.MessageStream.GetBuffer(), 0,
(int) connected.MessageStream.Length));
connected.MessageStream.SetLength(0);
switch (message.Type)
{
case Message.Types.Type.MESSAGE:
ThreadPool.QueueUserWorkItem(BroadcastMessage,
new KeyValuePair<Message, ConnectedSocket>(message, connected));
break;
case Message.Types.Type.COMMAND:
CommandWorker.PutTask(new CommandTask((s, connectedSocket) =>
{
var msg = Message.CreateBuilder()
.SetAuthor("SERVER")
.SetType(Message.Types.Type.MESSAGE)
.SetText(s).Build();
msg.WriteDelimitedTo(connectedSocket.Stream);
},
message.Text,
connected));
break;
}
connected.Socket.BeginReceive(connected.Buffer, 0, 5, SocketFlags.None, ReceiveSizeCallback,
connected);
}
private void HandleSocketException(ConnectedSocket connected, SocketException e)
{
CloseConnection(connected);
Logger.Error("Socket error: " + e.Message);
}
private void CloseConnection(ConnectedSocket connected)
{
connected.Socket.Close();
_clients.TryRemove(connected.Socket.Handle.ToInt32(), out connected);
}