[Bug 593459] Re: Some attchments (.pdf, .xlsx) don't have open dialog just save dialog

[Martin Wildam]

I made further tests with the following result: I took such a PDF I got
(offering only the save option) and sent it as new mail with attachment
to myself using Thunderbird.

Result: Open option available! - So it does not depend on the PDF
itself. I assume that it depends on the mailer how it packs the mime
message. Did further investigation and found the following difference:

Attachment header in mime Test-Message that is working:
Content-Type: application/pdf;

 name="#31161-v1-Programmierung_RepCheck.pdf"

Content-Transfer-Encoding: base64

Content-Disposition: attachment;

 filename="#31161-v1-Programmierung_RepCheck.pdf"


Attachment header in Original received mail:
Content-Type: application/octet-stream;

        name="#31161-v1-Programmierung_RepCheck.pdf"

Content-Transfer-Encoding: base64

Content-Description: #31161-v1-Programmierung_RepCheck.pdf

Content-Disposition: attachment;

        filename="#31161-v1-Programmierung_RepCheck.pdf"

It looks like a difference in specified Content-Type. The original mail
I got, was produced with MS Outlook 2007.

HTH.

-- 
Some attchments (.pdf, .xlsx) don't have open dialog just save dialog
https://bugs.launchpad.net/bugs/593459
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