/// <summary>
/// Processes a received message by looking for a newline character to satisfy a receive
/// request. If no newlines are found and there are requests, asks for more data.
/// </summary>
private void ProcessReceivedMessage()
{
// Look for strings ending in a newline.
while ((ReceivedMsg.Count() > 0 && ReceiveQueue.Count > 0))
{
string line = ReceivedMsg.Dequeue();
ReceiveRequest rr = ReceiveQueue.Dequeue();//wrong? when do we do this?
ThreadPool.QueueUserWorkItem(x => rr.receiveCallback(line, null, rr.payload));
}
///////////////////////////////////////////////////////////////////
// If there is no newline and you have a request, call BeginReceive.
while (ReceiveQueue.Count > 0)
{
try{
// Ask for some more data
socket.BeginReceive(buffer, 0, buffer.Length,
SocketFlags.None, MessageReceived, buffer);
//not sure why Matt suggetest this break
break;
}
catch (Exception e)
{
ReceiveRequest rr = ReceiveQueue.Dequeue(); //wrong? when do we do this?
ThreadPool.QueueUserWorkItem(x => rr.receiveCallback(null, e, rr.payload));
incoming = "";
}
}
}
/// <summary>
/// Called when some data has been received.
///
/// Gets the bytes that were received, stores them in a string, and
/// calls a method to process the received message.
/// </summary>
private void MessageReceived(IAsyncResult result)
{
// Protect the ReceiveQueue.
lock (ReceiveQueue)
{
try
{
// Get the buffer to which the data was written.
buffer = (byte[])(result.AsyncState);
// Figure out how many bytes have come in.
int bytes = socket.EndReceive(result);
// If no bytes were received, close the socket.
if (bytes == 0)
{
//socket.Close();
// Enqueue null message
ReceivedMsg.Enqueue(null);
// Call ProcessReceive
ProcessReceivedMessage();
}
// Otherwise, decode the incoming bytes, then process the message.
else
{
// Decode the bytes, and append them to the 'incoming' string member variable.
incoming += encoding.GetString(buffer, 0, bytes);
// Extract messages ending with newlines and enqueue them
//////////////////////////////////////////////////////////////////
// Look for strings ending in a newline.
int index;
while (((index = incoming.IndexOf('\n')) >= 0))
{
// Get the first string ending in a newline.
String line = incoming.Substring(0, index);
ReceivedMsg.Enqueue(line);
incoming = incoming.Substring(index + 1);
}
///////////////////////////////////////////////////////////////////////////////
ProcessReceivedMessage();
}
}
//Error occured
catch (Exception e)
{
ReceiveRequest rr = ReceiveQueue.Dequeue();
ThreadPool.QueueUserWorkItem(x => rr.receiveCallback(null, e, rr.payload));
ProcessReceivedMessage();
incoming = "";
}
}
}
