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Passing C++ classes across DCOM

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15 Nov 20012 min read 213.9K   2.5K   42  
Two classes that provide richer interfaces and easier semantics to pass classes via COM/DCOM
// StreamingClient.cpp : Defines the class behaviors for the application.
//

#include "stdafx.h"
#include "StreamingClient.h"
#include "StreamingClientDlg.h"
#include <initguid.h>
#include "StreamingClient_i.c"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CStreamingClientApp

BEGIN_MESSAGE_MAP(CStreamingClientApp, CWinApp)
	//{{AFX_MSG_MAP(CStreamingClientApp)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}AFX_MSG
	ON_COMMAND(ID_HELP, CWinApp::OnHelp)
	ON_THREAD_MESSAGE(ID_MSG_ON_CONNECTION_CHANGED,OnRCVServerEvent)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CStreamingClientApp construction

CStreamingClientApp::CStreamingClientApp()
{
	// TODO: add construction code here,
	// Place all significant initialization in InitInstance
}

/////////////////////////////////////////////////////////////////////////////
// The one and only CStreamingClientApp object

CStreamingClientApp theApp;

/////////////////////////////////////////////////////////////////////////////
// CStreamingClientApp initialization

BOOL CStreamingClientApp::InitInstance()
{
	if (!InitATL())
		return FALSE;

	AfxEnableControlContainer();

	CCommandLineInfo cmdInfo;
	ParseCommandLine(cmdInfo);

	if (cmdInfo.m_bRunEmbedded || cmdInfo.m_bRunAutomated)
	{
		return TRUE;
	}



	// Standard initialization
	// If you are not using these features and wish to reduce the size
	//  of your final executable, you should remove from the following
	//  the specific initialization routines you do not need.

#ifdef _AFXDLL
	Enable3dControls();			// Call this when using MFC in a shared DLL
#else
	Enable3dControlsStatic();	// Call this when linking to MFC statically
#endif

	CStreamingClientDlg dlg;
	m_pMainWnd = &dlg;
	int nResponse = dlg.DoModal();
	if (nResponse == IDOK)
	{
		// TODO: Place code here to handle when the dialog is
		//  dismissed with OK
	}
	else if (nResponse == IDCANCEL)
	{
		// TODO: Place code here to handle when the dialog is
		//  dismissed with Cancel
	}

	// Since the dialog has been closed, return FALSE so that we exit the
	//  application, rather than start the application's message pump.
	return FALSE;
}

	
CStreamingClientModule _Module;

BEGIN_OBJECT_MAP(ObjectMap)
END_OBJECT_MAP()

LONG CStreamingClientModule::Unlock()
{
	AfxOleUnlockApp();
	return 0;
}

LONG CStreamingClientModule::Lock()
{
	AfxOleLockApp();
	return 1;
}
LPCTSTR CStreamingClientModule::FindOneOf(LPCTSTR p1, LPCTSTR p2)
{
	while (*p1 != NULL)
	{
		LPCTSTR p = p2;
		while (*p != NULL)
		{
			if (*p1 == *p)
				return CharNext(p1);
			p = CharNext(p);
		}
		p1++;
	}
	return NULL;
}


int CStreamingClientApp::ExitInstance()
{
	if (m_bATLInited)
	{
		_Module.RevokeClassObjects();
		_Module.Term();
		CoUninitialize();
	}

	return CWinApp::ExitInstance();

}

BOOL CStreamingClientApp::InitATL()
{
	m_bATLInited = TRUE;

#if _WIN32_WINNT >= 0x0400
	HRESULT hRes = CoInitializeEx(NULL, COINIT_MULTITHREADED);
#else
	HRESULT hRes = CoInitialize(NULL);
#endif

	if (FAILED(hRes))
	{
		m_bATLInited = FALSE;
		return FALSE;
	}

	_Module.Init(ObjectMap, AfxGetInstanceHandle());
	_Module.dwThreadID = GetCurrentThreadId();

	LPTSTR lpCmdLine = GetCommandLine(); //this line necessary for _ATL_MIN_CRT
	TCHAR szTokens[] = _T("-/");

	BOOL bRun = TRUE;
	LPCTSTR lpszToken = _Module.FindOneOf(lpCmdLine, szTokens);
	while (lpszToken != NULL)
	{
		if (lstrcmpi(lpszToken, _T("UnregServer"))==0)
		{
			_Module.UpdateRegistryFromResource(IDR_STREAMINGCLIENT, FALSE);
			_Module.UnregisterServer(TRUE); //TRUE means typelib is unreg'd
			bRun = FALSE;
			break;
		}
		if (lstrcmpi(lpszToken, _T("RegServer"))==0)
		{
			_Module.UpdateRegistryFromResource(IDR_STREAMINGCLIENT, TRUE);
			_Module.RegisterServer(TRUE);
			bRun = FALSE;
			break;
		}
		lpszToken = _Module.FindOneOf(lpszToken, szTokens);
	}

	if (!bRun)
	{
		m_bATLInited = FALSE;
		_Module.Term();
		CoUninitialize();
		return FALSE;
	}


    // This provides a NULL DACL which will allow access to everyone.
    CSecurityDescriptor sd;
    sd.InitializeFromThreadToken();
    hRes = CoInitializeSecurity(NULL, -1, NULL, NULL,
        RPC_C_AUTHN_LEVEL_NONE,RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE, NULL);
    _ASSERTE(SUCCEEDED(hRes));

	hRes = _Module.RegisterClassObjects(CLSCTX_LOCAL_SERVER, REGCLS_MULTIPLEUSE);
	if (FAILED(hRes))
	{
		m_bATLInited = FALSE;
		CoUninitialize();
		return FALSE;
	}	



	return TRUE;

}

void CStreamingClientApp::OnRCVServerEvent(WPARAM wParam, LPARAM lParam)
{
	int a = 2;
}

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