Slnkdwf/SlnkDWFCom/Zip.cpp

// Zip.cpp : Implementation of CZip

#include "stdafx.h"
#include "Zip.h"

#define DATA_BUFFER_BYTES   4096

#define VERYSECRET ("H&4!0jKd")

// CZip

STDMETHODIMP CZip::InterfaceSupportsErrorInfo(REFIID riid)
{
	static const IID* arr[] = 
	{
		&IID_IZip
	};

	for (int i=0; i < sizeof(arr) / sizeof(arr[0]); i++)
	{
		if (InlineIsEqualGUID(*arr[i],riid))
			return S_OK;
	}
	return S_FALSE;
}

STDMETHODIMP CZip::Open(BSTR ZipPath)
{
	if (m_pZipFile)
		return myAtlReportError (GetObjectCLSID(), "\nCZip::Open zipfile is already open.");

	try
	{
		DWFCore::DWFFile oZipFilename( ZipPath );

		m_pZipFile = new DWFCore::DWFZipFileDescriptor(oZipFilename, DWFZipFileDescriptor::eUnzip);
		m_pZipFile->open();
	}
	catch (DWFException& ex)
	{
		CString err;
		err.Format("%ls\n%ls\n%s\n%ls(%d)",ex.type(),ex.message(),ex.function(),ex.file(),ex.line());
		return myAtlReportError (GetObjectCLSID(), "\nCZip::Open('%ls')\n%s", ZipPath, err);
    }

	return S_OK;
}

STDMETHODIMP CZip::New(BSTR ZipPath)
{
	if (m_pZipFile)
		return myAtlReportError (GetObjectCLSID(), "\nCZip::New zipfile is already open.");

	try
	{
		DWFCore::DWFFile oZipFilename( ZipPath );

		m_pZipFile = new DWFCore::DWFZipFileDescriptor(oZipFilename, DWFZipFileDescriptor::eZip);
		m_pZipFile->open();

	}
	catch (DWFException& ex)
	{
		CString err;
		err.Format("%ls\n%ls\n%s\n%ls(%d)",ex.type(),ex.message(),ex.function(),ex.file(),ex.line());
		return myAtlReportError (GetObjectCLSID(), "\nCZip::New('%ls')\n%s", ZipPath, err);
    }
	return S_OK;
}

STDMETHODIMP CZip::DecryptToStream(VARIANT pStream, BSTR filepath)
{
	return UnzipToStream(pStream, filepath, CComBSTR ( VERYSECRET ));
}

// Gebruik vanuit ASP: oZIP.UnzipToStream(Response, "Geheim");
// want het Response Object implementeerd mooi de IStream interface
STDMETHODIMP CZip::UnzipToStream(VARIANT pStream, BSTR filepath, BSTR Password/*=L""*/)
{
	if (!m_pZipFile)
		return myAtlReportError (GetObjectCLSID(), "\nCZip::UnzipToStream zipfile not open.");

	myTRACE("\nEntering CZip::UnzipToStream");

	CComQIPtr<IStream> pIStream;

	if (pStream.vt!=VT_ERROR)
	{
		VARIANT *var2 = &pStream;
		if (var2->vt==(VT_VARIANT|VT_BYREF)) // ByRef vanuit VBScript
			var2 = (VARIANT *)var2->pvarVal;

        if (var2->vt==VT_DISPATCH)
			pIStream = var2->pdispVal;
		else if (var2->vt==(VT_DISPATCH|VT_BYREF)) // ByRef vanuit VB
			pIStream = *(var2->ppdispVal);

		if (!pIStream)
			return E_INVALIDARG;

		try
		{
			unsigned char* pDataBuffer = DWFCORE_ALLOC_MEMORY( unsigned char, DATA_BUFFER_BYTES );
			if (pDataBuffer == NULL)
			{
				_DWFCORE_THROW( DWFMemoryException, L"No memory for data buffer" );
			}

			DWFCore::DWFInputStream* pUnzipStream = 
					m_pZipFile->unzip((LPCSTR)CString(filepath),(LPCSTR)CString(Password));
			
			while (pUnzipStream->available() > 0)
			{
				size_t nBytes;
				nBytes = pUnzipStream->read( pDataBuffer, DATA_BUFFER_BYTES );
				ULONG cb;
				pIStream->Write((void*)pDataBuffer, (ULONG)nBytes, &cb);
			}

			DWFCORE_FREE_OBJECT (pUnzipStream);
			DWFCORE_FREE_MEMORY( pDataBuffer )
		}
		catch (DWFException& ex)
		{
			CString err;
			err.Format("%ls\n%ls\n%s\n%ls(%d)",ex.type(),ex.message(),ex.function(),ex.file(),ex.line());
			return myAtlReportError (GetObjectCLSID(), "\nCZip::UnzipToStream()\n%s", err);
		}
    }

	return S_OK;
}

STDMETHODIMP CZip::EncryptFromString(BSTR filepath, BSTR data)
{
	return ZipFromString( filepath, data, CComBSTR ( VERYSECRET ));
}

// filepath naam waaronder opgeslagen binnen de ZIP
// data		Visual Basic string
// Password Optioneel
STDMETHODIMP CZip::ZipFromStream(BSTR filepath, VARIANT pStream, BSTR Password)
{
	if (!m_pZipFile)
		return myAtlReportError (GetObjectCLSID(), "\nCZip::ZipFromStream zipfile not open.");

	myTRACE("\nEntering CZip::ZipFromStream");

	CComQIPtr<IStream> pIStream;

	if (pStream.vt!=VT_ERROR)
	{
		VARIANT *var2 = &pStream;
		if (var2->vt==(VT_VARIANT|VT_BYREF)) // ByRef vanuit VBScript
			var2 = (VARIANT *)var2->pvarVal;

        if (var2->vt==VT_DISPATCH)
			pIStream = var2->pdispVal;
		else if (var2->vt==(VT_DISPATCH|VT_BYREF)) // ByRef vanuit VB
			pIStream = *(var2->ppdispVal);

		if (!pIStream)
			return E_INVALIDARG;

		try
		{
			// Naam waaronder binnen de zip is opgeslagen
			DWFCore::DWFString file((LPCSTR)CString(filepath));
			DWFCore::DWFOutputStream* pZipStream;

			pZipStream = m_pZipFile->zip(file,(LPCSTR)CString(Password));

			unsigned char* pDataBuffer = DWFCORE_ALLOC_MEMORY( unsigned char, DATA_BUFFER_BYTES );
			if (pDataBuffer == NULL)
			{
				_DWFCORE_THROW( DWFMemoryException, L"No memory for data buffer" );
			}
			
			ULONG cbRead;
			do
			{
				pIStream->Read((void*)pDataBuffer, DATA_BUFFER_BYTES, &cbRead);
				if (cbRead>0)
					pZipStream->write( pDataBuffer, cbRead);
			}
			while (cbRead == DATA_BUFFER_BYTES);

			pZipStream->flush();

			DWFCORE_FREE_MEMORY( pDataBuffer )
			DWFCORE_FREE_OBJECT (pZipStream);
		}
		catch (DWFException& ex)
		{
			CString err;
			err.Format("%ls\n%ls\n%s\n%ls(%d)",ex.type(),ex.message(),ex.function(),ex.file(),ex.line());
			return myAtlReportError (GetObjectCLSID(), "\nCZip::ZipFromString('%ls')\n%s", filepath, err);
		}
    }
	return S_OK;
}

// filepath naam waaronder opgeslagen binnen de ZIP
// data		Visual Basic string
// Password Optioneel
STDMETHODIMP CZip::ZipFromString(BSTR filepath, BSTR data, BSTR Password)
{
	if (!m_pZipFile)
		return myAtlReportError (GetObjectCLSID(), "\nCZip::ZipFromString zipfile not open.");

	myTRACE("\nEntering CZip::ZipFromString met data lengte: %d\n", SysStringByteLen(data));
	try
	{
		// Naam waaronder binnen de zip is opgeslagen
		DWFCore::DWFString file((LPCSTR)CString(filepath));
		DWFCore::DWFOutputStream* pZipStream;

		pZipStream = m_pZipFile->zip(file,(LPCSTR)CString(Password));
		size_t nBytes=pZipStream->write( data, SysStringByteLen(data));
		pZipStream->flush();
		DWFCORE_FREE_OBJECT (pZipStream);
	}
	catch (DWFException& ex)
	{
		CString err;
		err.Format("%ls\n%ls\n%s\n%ls(%d)",ex.type(),ex.message(),ex.function(),ex.file(),ex.line());
		return myAtlReportError (GetObjectCLSID(), "\nCZip::ZipFromString('%ls')\n%s", filepath, err);
    }
	return S_OK;
}

STDMETHODIMP CZip::Close(void)
{
	if (!m_pZipFile)
		return myAtlReportError (GetObjectCLSID(), "\nCZip::Close zipfile not open.");

	m_pZipFile->close();
	delete m_pZipFile;
	m_pZipFile = NULL;
	return S_OK;
}