---

mime.cpp

/*
 * Purpose: wxWindows mime implementation
 * Author:  Frank Buß
 * Created: 2002
 */

#include "email.h"
#include "Base64.h"


#include "wx/arrimpl.cpp"
WX_DEFINE_OBJARRAY(wxArrayMimePart);

struct wxMimeTypeMapping
{
    const wxChar* extension;
    const wxChar* mainType;
    const wxChar* subType;
};

// extension, main type, sub type
// TODO: must be merged / integrated / substituted with wxFileType
static const wxMimeTypeMapping g_mimeTypeMappings[] =
{
    { _T("txt"), _T("text"), _T("plain") },
    { _T("htm"), _T("text"), _T("html") },
    { _T("html"), _T("text"), _T("html") },
    { _T("gif"), _T("image"), _T("gif") },
    { _T("png"), _T("image"), _T("png") },
    { _T("jpg"), _T("image"), _T("jpeg") },
    { _T("jpeg"), _T("image"), _T("jpeg") },
    { _T("pdf"), _T("application"), _T("pdf") },
    { _T("doc"), _T("application"), _T("msword") }
};

wxMimePart::wxMimePart(const wxFileName& fileName) :
    m_fileName(fileName)
{
    // setup default encoding
    m_mainType = _T("application");
    m_subType = _T("octet-stream");

    // try to determine encoding by filename extension
    wxString ext = fileName.GetExt().Lower();
    for (int i = 0; i < sizeof(g_mimeTypeMappings) / sizeof(wxMimeTypeMapping); i++) {
        if (g_mimeTypeMappings[i].extension == ext) {
            m_mainType = g_mimeTypeMappings[i].mainType;
            m_subType = g_mimeTypeMappings[i].subType;
            break;
        }
    }
}

void wxMimePart::Encode(wxOutputStream& out)
{
    // TODO: error handling for every return
    // TODO: encoding it on-the-fly without loading it all in memory
    wxFileInputStream in(m_fileName.GetFullPath());
    if (!in.Ok()) return;

    // determine file length
    // TODO: perhaps this can be added to wxFileName for size()
    in.SeekI(0, wxFromEnd);
    size_t len = (size_t) in.TellI();
    in.SeekI(0);
    // that's possible for windows (#include <sys/types.h> and #include <sys/stat.h>):
    // struct _stat lenStat;
    // if (_stat(filename, &lenStat) == -1) return error;
    // size_t len = (size_t) lenStat.st_size;

    if (len == 0) return;

    // read file
    wxUint8* pData = new wxUint8[len];
    if (!pData) {
        wxASSERT_MSG(pData != NULL, _T("out of memory"));
        return;
    }
    in.Read(pData, len);

    // write encoded mime part to stream
    wxString cr("\x00d\x00a");
    wxString result;
    result << "Content-Type: " << m_mainType << "/" << m_subType << "; name=\"" << m_fileName.GetFullName() + "\"" + cr
           << "Content-Transfer-Encoding: base64" << cr
           << "Content-Disposition: attachment; filename=\"" << m_fileName.GetName() << "\"" << cr
           << cr
           << wxBase64::Encode(pData, len) << cr;
    out.Write((const char*) result, result.Length());
}

---