public void First_WaitForData()
{
try
{
if (m_pfnCallBack == null)
{
m_pfnCallBack = new AsyncCallback(OnDataReceived);
}
Communications.SocketPacket theSocPkt = new Communications.SocketPacket();
theSocPkt.m_currentSocket = m_Globals.m_communications.m_clientSocket;
// Start listening to the data asynchronously.
int offset = 0;
m_result = m_Globals.m_communications.m_clientSocket.BeginReceive(
theSocPkt.dataBuffer,
offset,
theSocPkt.dataBuffer.Length,
SocketFlags.None,
m_pfnCallBack,
theSocPkt
);
}
catch (SocketException se)
{
MessageBox.Show(se.Message);
}
}
public void WaitForData(System.Net.Sockets.Socket soc)
{
try
{
if (pfnWorkerCallBack == null)
{
// Specify the call back function which is to be
// invoked when there is any write activity by the
// connected client
pfnWorkerCallBack = new AsyncCallback(OnDataReceived);
}
Communications.SocketPacket theSocPkt = new Communications.SocketPacket();
theSocPkt.m_currentSocket = soc;
// Start receiving any data written by the connected client
// asynchronously
int offset = 0;
soc.BeginReceive(
theSocPkt.dataBuffer,
offset,
theSocPkt.dataBuffer.Length,
SocketFlags.None,
pfnWorkerCallBack,
theSocPkt
);
}
catch (SocketException se)
{
MessageBox.Show(se.Message);
}
}
public void OnDataReceived(IAsyncResult asyn)
{
try
{
Communications.SocketPacket socketData = (Communications.SocketPacket)asyn.AsyncState;
int iRx = 0;
// Complete the BeginReceive() asynchronous call by EndReceive() method
// which will return the number of characters written to the stream
// by the client
iRx = socketData.m_currentSocket.EndReceive(asyn);
char[] chars = new char[iRx + 1];
System.Text.Decoder d = System.Text.Encoding.UTF8.GetDecoder();
int charLen = d.GetChars(socketData.dataBuffer, 0, iRx, chars, 0);
System.String szData = new System.String(chars);
EndPoint remoteEndPoint = socketData.m_currentSocket.RemoteEndPoint;
if (LastEndPointStarted == null)
{
LastEndPointStarted = remoteEndPoint;
}
if (LastEndPointStarted == remoteEndPoint)
{ // My attempts to defeat concurrent thread write collisions. I was seeing 2 end points trying to write
// into the socket and that concatenated the bits at the bit level, so no byte received was even remotely
// correct. I put in this equality test to force the last end point we started working with to be the
// winner. The loser's message is ignored.
ReceivedMsg.AppendText(szData);
//when we are sure we received the entire message
//pass the Object received into parameter
//after removing the flag indicating the end of message
String EOMDelimiter = m_Globals.m_communications.EOMDelimiter;
if (ReceivedMsg.GetText().Contains(EOMDelimiter))
{
LastEndPointStarted = null;
String SanitizedMessage = Regex.Replace(ReceivedMsg.GetText(), EOMDelimiter, "");
ProcessCommMessage(SanitizedMessage, socketData.m_currentSocket.RemoteEndPoint);
}
}
// Continue the waiting for data on the Socket
WaitForData(socketData.m_currentSocket);
}
catch (ObjectDisposedException)
{
System.Diagnostics.Debugger.Log(0, "1", "\nOnDataReceived: Socket has been closed\n");
}
catch (SocketException se)
{
MessageBox.Show(se.Message);
}
}
public void OnDataReceived(IAsyncResult asyn)
{
try
{
Communications.SocketPacket theSockId = (Communications.SocketPacket)asyn.AsyncState;
int iRx = theSockId.m_currentSocket.EndReceive(asyn);
char[] chars = new char[iRx + 1];
System.Text.Decoder d = System.Text.Encoding.UTF8.GetDecoder();
int charLen = d.GetChars(theSockId.dataBuffer, 0, iRx, chars, 0);
System.String szData = new System.String(chars);
ReceivedMsg.AppendText(szData);
// If we finished receiving the response (EventData object) from the Broker
// then we will recover it.
String EOMDelimiter = m_Globals.m_communications.EOMDelimiter;
if (ReceivedMsg.GetText().Contains(EOMDelimiter))
{
// Remove the flag "ENDOFMESSAGE"
String SanitizedMessage = Regex.Replace(ReceivedMsg.GetText(), EOMDelimiter, "");
AppendToRichTextBoxHistoryResponses(SanitizedMessage);
ProcessCommMessage(SanitizedMessage);
ReceivedMsg.SetText("");
}
First_WaitForData();
}
catch (ObjectDisposedException)
{
System.Diagnostics.Debugger.Log(0, "1", "\nOnDataReceived: Socket has been closed\n");
}
catch (SocketException se)
{
MessageBox.Show(se.Message);
}
}
