How do I encode a string to base64 using only boost?

Question

I\'m trying to quickly encode a simple ASCII string to base64 (Basic HTTP Authentication using boost::asio) and not paste in any new code code or use any libraries beyond bo

Answer 1

I modified the Answer 8 because it's not functional on my platform.

const std::string base64_padding[] = {"", "==","="};
std::string *m_ArchiveData;

/// \brief  To Base64 string
bool Base64Encode(string* output) 
{  
    try
    {
        UInt32 iPadding_Mask = 0;
        typedef boost::archive::iterators::base64_from_binary
             > Base64EncodeIterator;  
        UInt32 len = m_ArchiveData->size();
        std::stringstream os;

        std::copy(Base64EncodeIterator(m_ArchiveData->c_str()), 
            Base64EncodeIterator(m_ArchiveData->c_str()+len), 
            std::ostream_iterator(os));

        iPadding_Mask = m_ArchiveData->size() % 3;
        os << base64_padding[iPadding_Pask];

        *output = os.str();
        return output->empty() == false;  
    }
    catch (...)
    {
        PLOG_ERROR_DEV("unknown error happens");
        return false;
    }
}  

/// \brief  From Base64 string
bool mcsf_data_header_byte_stream_archive::Base64Decode(const std::string *input) 
{  
    try
    {
        std::stringstream os;
        bool bPaded = false;
        typedef boost::archive::iterators::transform_width, 8, 6> Base64DecodeIterator;  

        UInt32 iLength = input->length();
        // Remove the padding characters, cf. https://svn.boost.org/trac/boost/ticket/5629
        if (iLength && (*input)[iLength-1] == '=') {
            bPaded = true;
            --iLength;
            if (iLength && (*input)[iLength - 1] == '=') 
            {
                --iLength;
            }
        }
        if (iLength == 0)
        {
            return false;
        }

        if(bPaded)
        {
            iLength --;
        }

        copy(Base64DecodeIterator(input->c_str()) ,
            Base64DecodeIterator(input->c_str()+iLength), 
            ostream_iterator(os)); 

        *m_ArchiveData = os.str();
        return m_ArchiveData->empty() == false;
    }
    catch (...)
    {
        PLOG_ERROR_DEV("unknown error happens");
        return false;
    }
}