/// <summary>
/// Called when a message has been successfully sent.
///
/// Decodes the unsent bytes and tries sending them again.
/// </summary>
private void MessageSent(IAsyncResult result)
{
// Protect SendQueue
lock (SendQueue)
{
try
{
// Find out how many bytes were actually sent
int bytes = socket.EndSend(result);
// Get the bytes that we attempted to send
byte[] outgoingBuffer = (byte[])result.AsyncState;
// If no bytes were received, close the socket.
//if (bytes == 0)
//{
// //what to do here???
// socket.Close();
//}
// Prepend the unsent bytes and try sending again.
//else
{
outgoing = encoding.GetString(outgoingBuffer, bytes,
outgoingBuffer.Length - bytes) + outgoing;
SendBytes();
}
}
catch (Exception e)
{
SendRequest sr2 = SendQueue.Dequeue();
ThreadPool.QueueUserWorkItem(x => sr2.sendCallback(e, sr2.payload));
}
}
}
/// <summary>
/// Checks if the entire message has been sent. If the message hasn't been sent
/// or there is another request, begin sending it.
/// </summary>
private void SendBytes()
{
if (SendQueue.Count > 0)
{
// If the entire message has been sent.
if (outgoing == "")
{
// Dequeue the send request.
SendRequest sr = SendQueue.Dequeue();
// Call the appropriate callback.
ThreadPool.QueueUserWorkItem(x => sr.sendCallback(null, sr.payload));
// If there's another request in the queue, get its message and begin sending it.
if (SendQueue.Count > 0)
{
outgoing = SendQueue.Peek().message;
byte[] outgoingBuffer = encoding.GetBytes(outgoing);
outgoing = "";
try
{
socket.BeginSend(outgoingBuffer, 0, outgoingBuffer.Length,
SocketFlags.None, MessageSent, outgoingBuffer);
}
catch (Exception e)
{
SendRequest sr1 = SendQueue.Dequeue();
ThreadPool.QueueUserWorkItem(x => sr1.sendCallback(e, sr1.payload));
}
}
}
// Otherwise, the entire message has not been sent. Send more.
else
{
byte[] outgoingBuffer = encoding.GetBytes(outgoing);
outgoing = "";
try
{
socket.BeginSend(outgoingBuffer, 0, outgoingBuffer.Length,
SocketFlags.None, MessageSent, outgoingBuffer);
}
catch (Exception e)
{
SendRequest sr2 = SendQueue.Dequeue();
ThreadPool.QueueUserWorkItem(x => sr2.sendCallback(e, sr2.payload));
}
}
}
}