IISNativeModule W3C Log CustomField

module.cpp

HRESULT __stdcall RegisterModule(
	DWORD dwServerVersion,
	IHttpModuleRegistrationInfo* pModuleInfo,
	IHttpServer* pGlobalInfo
	) {

    ::OutputDebugString ( TEXT("RegisterModule") );

	 HRESULT hr = S_OK;

    hr = pModuleInfo->SetRequestNotifications( 
        new ModuleFactory,
        RQ_SEND_RESPONSE,
        0
    );

	hr = pModuleInfo->SetPriorityForRequestNotification(RQ_SEND_RESPONSE,PRIORITY_ALIAS_HIGH);

	return hr;
}

HRESULT ModuleFactory::GetHttpModule(
	CHttpModule** ppModule,
	IModuleAllocator* pAllocator
	){
    
    Module* pModule = new Module;

	if (!pModule) {
        return HRESULT_FROM_WIN32( ERROR_NOT_ENOUGH_MEMORY );
    }

    *ppModule = pModule;

    return S_OK;
}

void ModuleFactory::Terminate() {
    delete this;
}

REQUEST_NOTIFICATION_STATUS Module::OnSendResponse(
	IN IHttpContext* pHttpContext,
	IN ISendResponseProvider* pProvider
	){
        if (TRUE == pProvider->GetReadyToLogData())
        {
            PHTTP_LOG_FIELDS_DATA pLogData = 
				(PHTTP_LOG_FIELDS_DATA) pProvider->GetLogData();

            if (NULL != pLogData)
            {
				HRESULT hr;
				PCSTR pszValue = nullptr;
				DWORD dwLength = 0;

				hr = pHttpContext->GetServerVariable(
					"MyVariable",
					&pszValue,
					&dwLength);

				if (FAILED( hr )) 
				{
					pszValue = nullptr;
					dwLength = 0;
				}

				pLogData->Cookie = (PCHAR)pszValue;
				pLogData->CookieLength = dwLength;

                hr = pProvider->SetLogData((HTTP_LOG_DATA *)pLogData);

				if (FAILED(hr))
                {
                    pProvider->SetErrorStatus( hr );
                    return RQ_NOTIFICATION_FINISH_REQUEST;
                }
			}
		}

		return RQ_NOTIFICATION_CONTINUE;
}