[Tickets #3565] RESOLVED: Attachment modification (newline structure changes)

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Ticket URL: http://bugs.horde.org/ticket/?id=3565
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 Ticket             | 3565
 Updated By         | Michael Slusarz <slusarz at mail.curecanti.org>
 Summary            | Attachment modification (newline structure changes)
 Queue              | IMP
 Version            | HEAD
 State              | Bogus
 Priority           | 2. Medium
 Type               | Bug
 Owners             | Michael Slusarz
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Michael Slusarz <slusarz at mail.curecanti.org> (2006-03-28 12:53) wrote:

It sounds like you are still not understanding the issue.  What the RFC
essentially says is that Quoted-Printable (by default) is not able to
reliably handle binary data.  This is because the Q-P algorithim differs
depending on whether you are feeding it binary vs. non-binary (e.g. text)
data.  Namely, the encoding of line ending characters differ depending on
whether the data is binary or not.

What is important for our purposes is that there is absolutely no way to
determine whether a given data stream is binary or not if it contains only
7bit characters.  The only way to tell if data is binary is via outside
information.  If IMP determines the data is binary, we encode in base64.  If
it is text we encode in quoted-printable.

In this case, IMP is determining the binary-ness of the data via the mime
type the browser is reporting when uploading the file (or via a MIME magic
call if the data is uploaded via application/octet-stream).  In your case,
the browser is reporting this data as a text/* part.  By definition of the
RFCs, a text/* part is NOT BINARY DATA.  Thus, we are encoding the file
correctly.  The issue is with either with your browser or the mime magic
regexs.  In either case, there is nothing broken with the way Horde/IMP is
encoding/decoding the data.