Quoting Nethub Online <nethubonl...@gmail.com>:
Sample A (sending via old version of Horde (Horde Groupware Webmail Edition
1.2.9)
MIME-Version: 1.0
Content-Type: multipart/alternative;
boundary="=_4odon3t0zmn"
Content-Transfer-Encoding: 7bit
User-Agent: Internet Messaging Program (IMP) H3 (4.3.9)
This message is in MIME format.
--=_4odon3t0zmn
Content-Type: text/plain;
charset=UTF-8
Content-Description: Plaintext Version of Message
Content-Disposition: inline
Content-Transfer-Encoding: 7bit
--=_4odon3t0zmn
Content-Type: text/html;
charset=UTF-8
Content-Description: HTML Version of Message
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
Result: The file name of download is "HTML_Version_of_Message" which I
believe about "Content-Description", however is it able to add extension
name for the file download? (e.g. HTML_Version_of_Message.html)
No extension should be added unless that is how it is sent.
"Extension" information is pretty much useless these days - even
Windows doesn't use it anymore. What is more important is the *MIME
type* we send when creating the download link. Any halfway recent OS
will save that MIME part information in the file's metadata when saving.
Sample B (sending from Gmail)
MIME-Version: 1.0
X-Received: by 10.58.211.227 with SMTP id nf3mr17997592vec.20.1373601670297;
Thu, 11 Jul 2013 21:01:10 -0700 (PDT)
Received: by 10.220.15.5 with HTTP; Thu, 11 Jul 2013 21:01:09 -0700 (PDT)
Date: Fri, 12 Jul 2013 12:01:09 +0800
Message-ID:
<cajshyw8ecn6y_pb7ata867n3xgf_fyvnead7q8tzccajy3r...@mail.gmail.com>
Content-Type: multipart/alternative; boundary=047d7bd6b65a9f048b04e1488f90
--047d7bd6b65a9f048b04e1488f90
Content-Type: text/plain; charset=ISO-8859-1
test
--047d7bd6b65a9f048b04e1488f90
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr">test<img src=3D"data:image/jpeg;base64,/9j/4RdzRXhpZgAASUk=
qAAgAAAARAAABAwABAAAAAA8AAAEBAwABAAAAYAkAAAIBAwADAAAA2gAAAAMBAwABAAAABQAAAA=
YBAwABAAAAAgAAAA4BAgAWAAAA4AAAAA8BAgAGAAAA9gAAABABAgANAAAA/AAAABIBAwABAAAAA=
Result: The file name of download is "Text", I believe because of no
"Content-Description", it is no file extension too.
Correct.
I guess IMP recognize it as text because no "Content-Description", is it a
bug or need to use other way to recognize the file type?
No. Content-Description is not machine parseable. It is recognized
as a "text" file since that is the primary portion of the MIME type
(which DOES have a defined syntax).
michael
___________________________________
Michael Slusarz [slus...@horde.org]
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