[imp] problems with some types of multipart attachments

[Ben Poliakoff]

Hi All,

I've encountered a problem with at least two types of multipart MIME
messages (multipart/signed and multipart/appledouble).  

I'm running Horde/Imp from CVS HEAD (updated within the last few days).
I've encountered this problem on two separate web servers.  The IMAP
server is running Cyrus IMAP 2.2.8.

The problem manifests itself when I try to view or download one of
the "sub parts" of the multipart attachment.  In both cases (view or
download) I get a "blank" browser window.

If I look at the source of the pages that I'm getting from my servers I
can't help but notice that the problematic URLs are missing key
elements.

When I look at the "view" URL for a non multipart attachment I see
something like this:

/horde/imp/view.php?popup_view=1&index=39&mailbox=INBOX.attachments&actionID=view_attach&id=2&mimecache=50e9a2337924b0c9179d0c603cf79c2b

And I'm able to view or download the attached file.

But the "view" URL for these problematic attachments looks more like
this:

/horde/imp/view.php?popup_view=1&actionID=view_attach&id=2&mimecache=1710837a257a3e9d5e1062e8a3e32e4d

In other words it's missing the arguments that specify the message index
number and the mailbox (i.e.: "index=39&mailbox=INBOX.attachments").

If I dig around and find the message index number, then I can add it
(and the mailbox) as arguments to the URL and I'm able to view or
download the message.

Does anyone have any idea why the "index" and "mailbox" arguments might
be missing when viewing these multipart MIME messages?

It's a bit bewildering!

Ben