//-------------------------------------------------------------------------
// Function Name :EncodeBase64
// Parameter(s) :LPBYTE *pBuf The binary buffer
// :ULONG ulSize size
// Return :CString the result
// Memo :encoding the binary buffer into Base64 string
//-------------------------------------------------------------------------
CString CXml::Base64Encode(LPBYTE pBuf, ULONG ulSize)
{
ASSERT( m_pDoc != NULL );
ASSERT( pBuf != NULL );
CString strRet = _T("");
try
{
MSXML2::IXMLDOMElementPtr pElement = NULL;
pElement = m_pDoc->createElement( _bstr_t(_T("Base64")) );
ASSERT( pElement != NULL );
HRESULT hr = S_OK;
hr = pElement->put_dataType( _bstr_t(_T("bin.base64")) );
ASSERT( SUCCEEDED(hr) );
SAFEARRAY * pAry = SafeArrayCreateVector( VT_UI1, 0L, ulSize);
::memcpy( pAry->pvData, pBuf, ulSize);
VARIANT var;
VariantInit(&var);
var.parray = pAry;
var.vt = VT_ARRAY | VT_UI1;
pElement->nodeTypedValue = var;
BSTR bstr = NULL;
hr = pElement->get_text( &bstr );
ASSERT( SUCCEEDED(hr) );
strRet = (LPCTSTR)_bstr_t( bstr, true);
if( bstr != NULL )
{
SysFreeString(bstr);
bstr = NULL;
}
RELEASE_PTR(pElement);
}
catch ( _com_error e )
{
TRACE( _T("CXml::Base64Encode failed:%s\n"), e.ErrorMessage());
ASSERT( FALSE );
}
return strRet;
}
//-------------------------------------------------------------------------
// Function Name :Base64Decode
// Parameter(s) :LPCTSTR pszIn Base64编码
// :LPBYTE pBuf 缓冲区首地址
// :ULONG &ulSize 缓冲区大小
// Return :BOOL
// Memo :将Base64编码解码为二进制形式
// 注意！此函数的缓冲区需要在函数调用完后删除
//-------------------------------------------------------------------------
BOOL CXml::Base64Decode(LPCTSTR pszIn, LPBYTE& pBuf, LONG& lSize)
{
ASSERT(m_pDoc != NULL);
try
{
MSXML2::IXMLDOMElementPtr pElement = NULL;
pElement = m_pDoc->createElement(_bstr_t(_T("Base64")));
ASSERT(pElement != NULL);
HRESULT hr = S_OK;
hr = pElement->put_dataType(_bstr_t(_T("bin.base64")));
ASSERT(SUCCEEDED(hr));
hr = pElement->put_text(CComBSTR(pszIn));
ASSERT(SUCCEEDED(hr));
hr = SafeArrayGetUBound(pElement->nodeTypedValue.parray, 1, &lSize);
ASSERT(SUCCEEDED(hr));
lSize ++;
pBuf = new BYTE[lSize];
memset(pBuf, 0, lSize);
memcpy(pBuf, LPVOID(pElement->nodeTypedValue.parray->pvData), lSize);
RELEASE_PTR(pElement);
}
catch (_com_error e)
{
TRACE(_T("CXml::Base64Decode 发生异常：%s\n"), e.ErrorMessage());
ASSERT(FALSE);
return FALSE;
}
return TRUE;
}