Re: [Evolution] Opening pdf attachments

[Carpet Nailz <carpetnailz researchintegration org>]

On Wed, 2009-12-16 at 00:23 +0000, Patrick O'Callaghan wrote:
> On Tue, 2009-12-15 at 17:30 -0500, Carpet Nailz wrote:
> > I don't think it's the solution, though. In the case of the email with
> > two pdfs attached, they both are type=application/pdf (according to
> > the
> > properties of the files once I save them to the desktop), yet one (in
> > the email) give me as options to open Evince, Acrobat, OpenOffice
> > writer, & GIMP; while the other (same type) only gives OOwriter/web
> > and
> > gedit. (On the desktop they both give me the same set of apps to open
> > with: Evince, Acrobat, OpenOffice Writer and GIMP.)
>
> This is irrelevant. Evo looks at the MIME types encoded in the message
> itself. Look at the MIME headers using View->Message Source or Ctrl-U.
>
> poc
I took a look at the MIME info in the email Message Source. The
attachment that gave me good "open with" results (Evince,OpenOffice
Writer,Acrobat, Gimp) showed this:
        Content-type: application/pdf; name="knutsonetal_NeuralPredictors.pdf";
x-mac-creator="70727677"; x-mac-type="50444620"
        Content-disposition: attachment;
filename="knutsonetal_NeuralPredictors.pdf"
        Content-transfer-encoding: base64

The other message, which only offered OpenOffice Writer/web and gedit as
open with options, showed this: 

        Content-type: application/octet-stream; name="application of real-time
fMRI.pdf"
        Content-disposition: attachment; filename="application of real-time
fMRI.pdf"
        Content-transfer-encoding: base64
        
I guess I don't understand what determines the MIME type of a pdf. From
what I see when investigating MIME types on the web, there should be a
close relationship between file type (eg, pdf) and mime type. I haven't
been able to find anything but cursory explanations of MIME types that
just link them with file types such as pdf.

Other items:
One forum discussing this included this strange bit of advice, "Inform
the clueless sender about the proper MIME types." Can the sender change
the MIME type of an existing pdf?

The email I'm focusing on included this statement in the message source:
"This message is in MIME format. Since your mail reader does not
understand this format, some or all of this message may not be legible."
Why would Evolution not understand MIME format?

When I went to my wife's Mac (OS X 5) to see what it could tell me about
the pdfs that she sent to me, I couldn't fine anything at all about MIME
type in the "Get Info" for the documents. Each was just described as
"Kind: Portable Document Format," although they had different encoding
software indicated.

Thanks.

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