[imp] Problems on forwarding mail with attachment (filename mangling)

[Jan Schneider]

Please add a ticket to bugs.horde.org

Zitat von Andreas Geesen <ag at netside.de>:

> Since nobody seems to have (had) a similar problem i tried to figure out
> what happens on forwarding an email with an attachment whose name
> contains special characters - that means the filename needs to be
> encoded in 'ISO-8859-15'. The source-view of the message to be forwarded
> shows the filename is encoded already that way.
> In "compose.php" the forwarded message is taken and completely copied
> into the contents of a new message. The function 'attachFilesFromMessage'
> is responsible for copying the all attachments by iterating through
> every attachment and calling 'addMIMEPartAttachment' for every suitable
> attachment. Within that function 'addMIMEPartAttachment' i lost track on
> how the filename of the attachment is getting decoded or maybe its not
> decoded. Maybe this part resides in 'transferDecodeContents' but i am
> not sure now.
> All i know is that on sending the forwarded message the filename is
> corrupted already. Looks like its encoded twice. While building the
> message to be handed over to sendmail i followed the process up to the
> function 'buildAllAttachments'. Inside that function the attachments
> turn out to be in a construct '$this->_cache' and every filename i get
> from '$part->getName(true)' is corrupted already.
>
> Now my hot guess is that the filename needs to be decoded before being
> written into that '_cache'. Is anyone here who has deeper insight into
> imps internals? If anyone thinks this is a 'dev' thing that needs to be
> posted there please pass me a short note. I dont want to bother devs
> unless really necessary.
>
> Regards
> Andreas
>
> Andreas Geesen schrieb:
>
>> Hi all! Nice to be here
>>
>> I searched the archive of this list already on my problem, but havent
>> found anything similar though bug #1300 might have had something to do
>> with it. Since i've got the actual version of IMP (V 4.0.4 and HORDE
>> 3.0.6) bug #1300 should have been solved.
>>
>> Now for the facts....
>>
>> I received an email with an attachment. The name of the attachment
>> contains special characters (german umlauts like ä ö ü - you know) which
>> display absolutely correct since the default charset is iso-8859-15. But
>> now i take this email and forward it to a friend whose inbox is on the
>> same HORDE/IMP server and no matter of choice wether to forward the
>> attachment inline or as attachment the filename is totally screwed when
>> he reads the email.
>>
>> I found out when looking into my sent-mail-Folder that the filename gets
>> scrambled on forwarding since the notice about the removed attachment in
>> the forwarded email shows the same scrambled filename.
>> A short test by forwarding to an external email-Adress (gmx Mailbox)
>> shows the same result: scrambled filename.
>>
>> I peeked into the sources of the received and the forwarded email. Both
>> filenames are marked as iso-8859-15 but thats the only common thing. As
>> you can see 'ö' seems to be invulnerable while 'ä' and 'ü' get messed with.
>>
>> Right display: "Liste-Hermann_Schräder_(Büromöbel)_#2005-10-26.pdf <#>"
>>
>> =?iso-8859-15?b?TGlzdGUtSGVybWFubl9TY2hy5GRlcl8oQvxybw==?= 
>> =?iso-8859-15?b?bfZiZWwpXyMyMDA1LTEwLTI2LnBkZg==?=
>>
>>
>> Scrambled display: "Liste-Hermann_SchrÃ-der_(BÃ-romöbel)_#2005-10-26.pdf"
>>
>> =?iso-8859-15?b?TGlzdGUtSGVybWFubl9TY2hywz9kZXJfKELDPw==?= 
>> =?iso-8859-15?b?cm9tw7ZiZWwpXyMyMDA1LTEwLTI2LnBkZg==?=
>>
>>
>>
>> Anyone with any good ideas? Should i try UTF-8 instead of iso-8859-15?
>> Is it a bug in IMP or a config-thing?
>>
>> Any comments welcome
>>
>> Best regards
>> Andreas
>>
>>
>>
>
> --
> mit freundlichem Gruß
>
>
> Andreas Geesen
>
> NETSIDE ONLINE SERVICE
> Abteilung Softwareentwicklung
>
> Tel: 02562 93980
> Fax: 02562 939811
>
> ag at netside.de
> www.netside.de
>
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>



Jan.

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