[Dovecot] Dovecot/IMP Bug with RFC822.SIZE and BODYSTRUCTURE

[Ryan Hulsker]

Ok, I have narrowed my IMP/Dovecot attachment problem down to what I
think is a bug in Dovecot.  The test that follow are performed on
0.99.11.

When you download an attachment in IMP it uses the php function
imap_fetchbody() which contacts the IMAP server and retrieves just the
mime chunk you are looking for.

It does this by first fetching some information about the email, and
then grabs the specific chunk you are looking for in a second request.

The first request looks like this.

"FETCH 258 (ENVELOPE BODY.PEEK[HEADER.FIELDS (Path Message-ID Newsgroups
Followup-To References)] BODYSTRUCTURE INTERNALDATE RFC822.SIZE FLAGS)"

Dovecot responds properly on all parts of this request except for the
BODYSTRUCTURE portion which gets returned as this.

"BODYSTRUCTURE ("text" "plain" NIL NIL NIL "7bit" 0 0 NIL NIL NIL)"

This causes the imap_fetchbody() funtion to freak out and not do the 2nd
request, and it returns 0 bytes.

If I manually try "FETCH 258 (BODYSTRUCTURE)" Dovecot returns the
expected data properly.

I figured there must be an interaction between the BODYSTRUCTURE fetch
and one of the other items that are requested, so I tried them all and
narrowed it down to this.

FETCH 258 (BODYSTRUCTURE) <- works OK

FETCH 258 (BODYSTRUCTURE RFC822.SIZE) <- BODYSTRUCTURE reply is wrong.


I have been surfing through the dovecot source looking for a way to fix
or work around this, but I am only a mediocre C coder.

Can anyone enlighten me?

Ryan Hulsker