/**
* Returns the mime type for a given attachment. There are three possible results: - If thumbnail
* Uri, always returns "image/png" (even if there's no attachment) - If the attachment does not
* exist, returns null - Returns the mime type of the attachment
*/
@Override
public String getType(Uri uri) {
long callingId = Binder.clearCallingIdentity();
try {
List<String> segments = uri.getPathSegments();
String id = segments.get(1);
int match = sURIMatcher.match(uri);
String format = (match == ATTACHMENTS_CACHED_FILE_ACCESS) ? null : segments.get(2);
if (AttachmentUtilities.FORMAT_THUMBNAIL.equals(format)) {
return "image/png";
} else {
uri =
(match == ATTACHMENTS_CACHED_FILE_ACCESS)
? rebuildUri(uri)
: ContentUris.withAppendedId(Attachment.CONTENT_URI, Long.parseLong(id));
Cursor c =
getContext().getContentResolver().query(uri, MIME_TYPE_PROJECTION, null, null, null);
try {
if (c.moveToFirst()) {
String mimeType = c.getString(MIME_TYPE_COLUMN_MIME_TYPE);
String fileName = c.getString(MIME_TYPE_COLUMN_FILENAME);
mimeType = AttachmentUtilities.inferMimeType(fileName, mimeType);
return mimeType;
}
} finally {
c.close();
}
return null;
}
} finally {
Binder.restoreCallingIdentity(callingId);
}
}
/**
* Convert a MIME Part object into an Attachment object. Separated for unit testing.
*
* @param part MIME part object to convert
* @return Populated Account object
* @throws MessagingException
*/
@VisibleForTesting
protected static Attachment mimePartToAttachment(final Part part) throws MessagingException {
// Transfer fields from mime format to provider format
final String contentType = MimeUtility.unfoldAndDecode(part.getContentType());
String name = MimeUtility.getHeaderParameter(contentType, "name");
if (TextUtils.isEmpty(name)) {
final String contentDisposition = MimeUtility.unfoldAndDecode(part.getDisposition());
name = MimeUtility.getHeaderParameter(contentDisposition, "filename");
}
// Incoming attachment: Try to pull size from disposition (if not downloaded yet)
long size = 0;
final String disposition = part.getDisposition();
if (!TextUtils.isEmpty(disposition)) {
String s = MimeUtility.getHeaderParameter(disposition, "size");
if (!TextUtils.isEmpty(s)) {
try {
size = Long.parseLong(s);
} catch (final NumberFormatException e) {
LogUtils.d(LogUtils.TAG, e, "Could not decode size \"%s\" from attachment part", size);
}
}
}
// Get partId for unloaded IMAP attachments (if any)
// This is only provided (and used) when we have structure but not the actual attachment
final String[] partIds = part.getHeader(MimeHeader.HEADER_ANDROID_ATTACHMENT_STORE_DATA);
final String partId = partIds != null ? partIds[0] : null;
final Attachment localAttachment = new Attachment();
// Run the mime type through inferMimeType in case we have something generic and can do
// better using the filename extension
localAttachment.mMimeType = AttachmentUtilities.inferMimeType(name, part.getMimeType());
localAttachment.mFileName = name;
localAttachment.mSize = size;
localAttachment.mContentId = part.getContentId();
localAttachment.setContentUri(null); // Will be rewritten by saveAttachmentBody
localAttachment.mLocation = partId;
localAttachment.mEncoding = "B"; // TODO - convert other known encodings
return localAttachment;
}