BOOL CMapiMessage::GetAttachmentInfo( int idx)
{
ClearTempAttachFile();
BOOL bResult = TRUE;
if ((idx < 0) || (idx >= (int)m_attachNums.Length())) {
return( FALSE);
}
DWORD aNum = m_attachNums[idx];
LPATTACH lpAttach = NULL;
HRESULT hr = m_lpMsg->OpenAttach( aNum, NULL, 0, &lpAttach);
if (HR_FAILED( hr)) {
MAPI_TRACE2( "\t\t****Attachment error, unable to open attachment: %d, 0x%lx\r\n", idx, hr);
return( FALSE);
}
LPSPropValue pVal;
pVal = CMapiApi::GetMapiProperty( lpAttach, PR_ATTACH_MIME_TAG);
if (pVal)
CMapiApi::GetStringFromProp( pVal, m_attachMimeType);
else
m_attachMimeType.Truncate();
pVal = CMapiApi::GetMapiProperty( lpAttach, PR_ATTACH_METHOD);
if (pVal) {
LONG aMethod = CMapiApi::GetLongFromProp( pVal);
if ((aMethod == ATTACH_BY_REF_ONLY) || (aMethod == ATTACH_BY_REFERENCE) || (aMethod == ATTACH_BY_REF_RESOLVE)) {
m_attachPath.Truncate();
pVal = CMapiApi::GetMapiProperty( lpAttach, PR_ATTACH_PATHNAME);
if (pVal)
CMapiApi::GetStringFromProp( pVal, m_attachPath);
MAPI_TRACE2("\t\t** Attachment #%d by ref: %s\r\n",
idx, m_attachPath.get());
m_ownsAttachFile = FALSE;
}
else if (aMethod == ATTACH_BY_VALUE) {
MAPI_TRACE1( "\t\t** Attachment #%d by value.\r\n", idx);
bResult = CopyBinAttachToFile( lpAttach);
}
else if (aMethod == ATTACH_OLE) {
MAPI_TRACE1( "\t\t** Attachment #%d by OLE - yuck!!!\r\n", idx);
}
else if (aMethod == ATTACH_EMBEDDED_MSG) {
MAPI_TRACE1( "\t\t** Attachment #%d by Embedded Message??\r\n", idx);
}
else {
MAPI_TRACE2( "\t\t** Attachment #%d unknown attachment method - 0x%lx\r\n", idx, aMethod);
bResult = FALSE;
}
}
else
bResult = FALSE;
nsCString fName, fExt;
pVal = CMapiApi::GetMapiProperty( lpAttach, PR_ATTACH_LONG_FILENAME);
if (pVal)
CMapiApi::GetStringFromProp( pVal, fName);
pVal = CMapiApi::GetMapiProperty( lpAttach, PR_ATTACH_EXTENSION);
if (pVal)
CMapiApi::GetStringFromProp( pVal, fExt);
pVal = CMapiApi::GetMapiProperty( lpAttach, PR_ATTACH_SIZE);
long sz = 0;
if (pVal)
sz = CMapiApi::GetLongFromProp( pVal);
/*
// I have no idea how this tag is used, how to interpret it's value, etc.
// Fortunately, the Microsoft documentation is ABSOLUTELY NO HELP AT ALL. In fact,
// if one goes by the docs and sample code, this tag is completely 100% useless. I'm
// sure it has some important meaning which will one day be obvious, but for now,
// it is ignored.
pVal = CMapiApi::GetMapiProperty( lpAttach, PR_ATTACH_TAG);
if (pVal) {
::MAPIFreeBuffer( pVal);
}
*/
MAPI_TRACE1("\t\t\t--- Mime type: %s\r\n", m_attachMimeType.get());
MAPI_TRACE2("\t\t\t--- File name: %s, extension: %s\r\n",
fName.get(), fExt.get());
MAPI_TRACE1("\t\t\t--- Size: %ld\r\n", sz);
if (fExt.IsEmpty()) {
int idx = fName.RFindChar( '.');
if (idx != -1)
fName.Right( fExt, fName.Length() - idx);
}
if ((fName.RFindChar( '.') == -1) && !fExt.IsEmpty()) {
fName += ".";
fName += fExt;
}
m_attachFileName = fName;
if (m_attachMimeType.IsEmpty()) {
PRUint8 *pType = NULL;
if (!fExt.IsEmpty()) {
pType = CMimeTypes::GetMimeType( fExt);
}
if (pType)
m_attachMimeType = (PC_S8)pType;
else
m_attachMimeType = "application/octet-stream";
}
pVal = CMapiApi::GetMapiProperty( lpAttach, PR_ATTACH_TRANSPORT_NAME);
if (pVal) {
CMapiApi::GetStringFromProp( pVal, fName);
MAPI_TRACE1("\t\t\t--- Transport name: %s\r\n", fName.get());
}
lpAttach->Release();
return( bResult);
}
bool CMapiMessage::AddAttachment(DWORD aNum)
{
LPATTACH lpAttach = NULL;
HRESULT hr = m_lpMsg->OpenAttach(aNum, NULL, 0, &lpAttach);
if (HR_FAILED(hr)) {
MAPI_TRACE2("\t\t****Attachment error, unable to open attachment: %d, 0x%lx\r\n", idx, hr);
return false;
}
bool bResult = false;
attach_data *data = new attach_data;
ULONG aMethod;
if (data) {
bResult = true;
// 1. Get the file that contains the attachment data
LPSPropValue pVal = CMapiApi::GetMapiProperty(lpAttach, PR_ATTACH_METHOD);
if (pVal) {
aMethod = CMapiApi::GetLongFromProp(pVal);
switch (aMethod) {
case ATTACH_BY_VALUE:
MAPI_TRACE1("\t\t** Attachment #%d by value.\r\n", aNum);
bResult = CopyBinAttachToFile(lpAttach, getter_AddRefs(data->tmp_file));
data->delete_file = true;
break;
case ATTACH_BY_REFERENCE:
case ATTACH_BY_REF_RESOLVE:
case ATTACH_BY_REF_ONLY:
pVal = CMapiApi::GetMapiProperty(lpAttach, PR_ATTACH_PATHNAME_W);
if (pVal) {
nsCString path;
CMapiApi::GetStringFromProp(pVal, path);
nsresult rv;
data->tmp_file = do_CreateInstance(NS_LOCAL_FILE_CONTRACTID, &rv);
if (NS_FAILED(rv) || !data->tmp_file) {
MAPI_TRACE0("*** Error creating file spec for attachment\n");
bResult = false;
}
else data->tmp_file->InitWithNativePath(path);
}
MAPI_TRACE2("\t\t** Attachment #%d by ref: %s\r\n",
aNum, m_attachPath.get());
break;
case ATTACH_EMBEDDED_MSG:
MAPI_TRACE1("\t\t** Attachment #%d by Embedded Message??\r\n", aNum);
// Convert the embedded IMessage from PR_ATTACH_DATA_OBJ to rfc822 attachment
// (see http://msdn.microsoft.com/en-us/library/cc842329.aspx)
// This is a recursive call.
bResult = CopyMsgAttachToFile(lpAttach, getter_AddRefs(data->tmp_file));
data->delete_file = true;
break;
case ATTACH_OLE:
MAPI_TRACE1("\t\t** Attachment #%d by OLE - yuck!!!\r\n", aNum);
break;
default:
MAPI_TRACE2("\t\t** Attachment #%d unknown attachment method - 0x%lx\r\n", aNum, aMethod);
bResult = false;
}
}
else
bResult = false;
if (bResult)
bResult = data->tmp_file;
if (bResult) {
bool isFile = false;
bool exists = false;
data->tmp_file->Exists(&exists);
data->tmp_file->IsFile(&isFile);
if (!exists || !isFile) {
bResult = false;
MAPI_TRACE0("Attachment file does not exist\n");
}
}
if (bResult)
bResult = GetURL(data->tmp_file, getter_AddRefs(data->orig_url));
if (bResult) {
// Now we have the file; proceed to the other properties
data->encoding = NS_strdup(ENCODING_BINARY);
nsString fname, fext;
pVal = CMapiApi::GetMapiProperty(lpAttach, PR_ATTACH_LONG_FILENAME_W);
if (!pVal)
pVal = CMapiApi::GetMapiProperty(lpAttach, PR_ATTACH_FILENAME_W);
CMapiApi::GetStringFromProp(pVal, fname);
pVal = CMapiApi::GetMapiProperty(lpAttach, PR_ATTACH_EXTENSION_W);
CMapiApi::GetStringFromProp(pVal, fext);
MAPI_TRACE2("\t\t\t--- File name: %s, extension: %s\r\n",
fname.get(), fext.get());
if (fext.IsEmpty()) {
int idx = fname.RFindChar(L'.');
if (idx != -1)
fext = Substring(fname, idx);
}
else if (fname.RFindChar(L'.') == -1) {
fname += L".";
fname += fext;
}
if (fname.IsEmpty()) {
// If no description use "Attachment i" format.
fname = L"Attachment ";
fname.AppendInt(static_cast<uint32_t>(aNum));
}
data->real_name = ToNewUTF8String(fname);
nsCString tmp;
// We have converted it to the rfc822 document
if (aMethod == ATTACH_EMBEDDED_MSG) {
data->type = NS_strdup(MESSAGE_RFC822);
} else {
pVal = CMapiApi::GetMapiProperty(lpAttach, PR_ATTACH_MIME_TAG_A);
CMapiApi::GetStringFromProp(pVal, tmp);
MAPI_TRACE1("\t\t\t--- Mime type: %s\r\n", tmp.get());
if (tmp.IsEmpty()) {
uint8_t *pType = NULL;
if (!fext.IsEmpty()) {
pType = CMimeTypes::GetMimeType(fext);
}
if (pType)
data->type = NS_strdup((PC_S8)pType);
else
data->type = NS_strdup(APPLICATION_OCTET_STREAM);
}
else
data->type = ToNewCString(tmp);
}
pVal = CMapiApi::GetMapiProperty(lpAttach, PR_ATTACH_CONTENT_ID_A);
CMapiApi::GetStringFromProp(pVal, tmp);
if (!tmp.IsEmpty())
data->cid = ToNewCString(tmp);
}
if (bResult) {
// Now we need to decide if this attachment is embedded or not.
// At first, I tried to simply check for the presence of the Content-Id.
// But it turned out that this method is unreliable, since there exist cases
// when an attachment has a Content-Id while isn't embedded (even in a message
// with a plain-text body!). So next I tried to look for <img> tags that contain
// the found Content-Id. But this is unreliable, too, because there exist cases
// where other places of HTML reference the embedded messages (e.g. it may be
// a background of a table cell, or some CSS; further, it is possible that the
// reference to an embedded object is not in the main body, but in another
// embedded object - like body references a CSS attachment that in turn references
// a picture as a background of its element). From the other hand, it's unreliable
// to relax the search criteria to any occurence of the Content-Id string in the body -
// partly because the string may be simply in a text or other non-referencing part,
// partly because of the abovementioned possibility that the reference is outside
// the body at all.
// There exist the PR_ATTACH_FLAGS property of the attachment. The MS documentation
// tells about two possible flags in it: ATT_INVISIBLE_IN_HTML and ATT_INVISIBLE_IN_RTF.
// There is at least one more undocumented flag: ATT_MHTML_REF. Some sources in Internet
// suggest simply check for the latter flag to distinguish between the embedded
// and ordinary attachments. But my observations indicate that even if the flags
// don't include ATT_MHTML_REF, the attachment is still may be embedded.
// However, my observations always show that the message is embedded if the flags
// is not 0.
// So now I will simply test for the non-zero flags to decide whether the attachment
// is embedded or not. Possible advantage is reliability (I hope).
// Another advantage is that it's much faster than search the body for Content-Id.
DWORD flags = 0;
pVal = CMapiApi::GetMapiProperty(lpAttach, PR_ATTACH_FLAGS);
if (pVal)
flags = CMapiApi::GetLongFromProp(pVal);
if (m_bodyIsHtml && data->cid && (flags != 0)) // this is the embedded attachment
m_embattachments.push_back(data);
else // this is ordinary attachment
m_stdattachments.push_back(data);
}
else {
delete data;
}
}
lpAttach->Release();
return bResult;
}
