all i have a QT app that opens a IPC port on windows and waits for a connection from a client... when i connect with QT client its fine, however a native windows app, it fails to get the proper data. I am convinced its a character encoding issue. But im unsure as to the *best* way to address it... i can alter either the QT app or the Native windows app..This will only run on windows, so portability isnt a concern. The Client MUST be native windows, so i cant do all QT... (i wish believe me)

I see the count of the data received in the client as "READ(30)", so i know data is going...

QT IPC Socket Code
Qt Code: 
  1. void LocalSocketIpcServer::returnPrinter(QString printer)
  2. {
  3.  
  4. 	PRN_DEBUG() << "Returning: " << printer;
  5.  
  6. 	QByteArray block;
  7.     QDataStream out(&block, QIODevice::ReadWrite);
  8.     out.setVersion(QDataStream::Qt_4_0);
  9.     out << (quint16)0;
  10. 	out << printer;
  11.     out.device()->seek(0);
  12.     out << (quint16)(block.size() - sizeof(quint16));
  13.  
  14.     QLocalSocket *clientConnection = m_server->nextPendingConnection();
  15.  
  16.     connect(clientConnection, SIGNAL(disconnected()),
  17.             clientConnection, SLOT(deleteLater()));
  18.  
  19.     clientConnection->write(block);
  20.     clientConnection->flush();
  21. 	clientConnection->disconnectFromServer();
  22.  
  23. 	emit finishedSending();
  24. }
To copy to clipboard, switch view to plain text mode 


Native Windows client
Qt Code: 
  1. #include <windows.h>
  2.     #include <conio.h>
  3.     #include <iostream>
  4.     using namespace std;
  5.  
  6.     const wchar_t cszPipeName[] = L"\\\\.\\pipe\\TestPort";
  7.  
  8.     int main(int argc, wchar_t* argv[])
  9.     {
  10. 		HANDLE hPipe = INVALID_HANDLE_VALUE;
  11.  
  12. 		do {
  13.  
  14. 			// Get handle to a read only pipe that must exists.
  15. 			hPipe = CreateFileW(
  16. 								cszPipeName,
  17. 								GENERIC_READ, // | GENERIC_WRITE,
  18. 								0,
  19. 								NULL,
  20. 								OPEN_EXISTING,
  21. 								0,
  22. 								NULL
  23. 								);
  24.  
  25. 			if( hPipe == INVALID_HANDLE_VALUE ){
  26. 				cerr << "CreateFile fail. Err: " << GetLastError() << endl;
  27. 				break;
  28. 				}
  29.  
  30. 			cout << "Press any key to exit" << endl;
  31.  
  32. 			wchar_t szMessage[256] = {0};
  33.  
  34. 			// Keep buffer null terminated. Don't use last element.
  35. 			DWORD dwMsgSize = (sizeof(szMessage)-1)*sizeof(wchar_t);
  36.  
  37. 			//while(!_kbhit()) {
  38.  
  39. 				// Read messages until an error on the pipe happen
  40. 				// or the user press any key on the keyboard.
  41. 				DWORD dwRead = 0;
  42. 				BOOL bRet = ReadFile(
  43. 									hPipe,
  44. 									szMessage,
  45. 									dwMsgSize,
  46. 									&dwRead,
  47. 									NULL
  48. 								);
  49. 				if(!bRet) {
  50.  
  51. 						cerr << "Read fail. Err: " << GetLastError() << endl;
  52. 						break;
  53. 				}
  54.  
  55. 				wcout << "READ (" << dwRead << ") " << szMessage << endl;
  56.  
  57. 			//} // end while
  58.  
  59. 		} while(false);  // end do
  60.  
  61. 		if(hPipe != INVALID_HANDLE_VALUE) {
  62. 			CloseHandle(hPipe);
  63. 		}
  64.  
  65.     return 0;
  66.     }
To copy to clipboard, switch view to plain text mode