Re: [AudioTF] Agenda 2018-12-14

As Brady said, you need the mimetype file for systems that handle multiple types of ZIPped content.   However it need not be first *unless* (as noted) that system is also using it in a “magic number” scenario.  But such a scenario has *never* been suggested or recommended…

Leonard

From: Ric Wright <rkwright@geofx.com>
Date: Thursday, December 13, 2018 at 1:55 PM
To: Dave Cramer <dauwhe@gmail.com>, Matt Garrish <matt.garrish@gmail.com>
Cc: W3C Publishing Working Group <public-publ-wg@w3.org>
Subject: Re: [AudioTF] Agenda 2018-12-14
Resent-From: <public-publ-wg@w3.org>
Resent-Date: Thursday, December 13, 2018 at 1:54 PM

Right.  I was going to say that I believe that Readium-1 will throw an exception if the mimetype is not present (Did you check Readium, Dave?).  And, at least when I was in charge,  RMSDK would throw an exception if the mimetype was missing. From the fact the Digital Editions fails, I suspect that code is still present.

Ric

From: Dave Cramer <dauwhe@gmail.com<mailto:dauwhe@gmail.com>>
Date: Thursday, December 13, 2018 at 7:57 AM
To: Matt Garrish <matt.garrish@gmail.com<mailto:matt.garrish@gmail.com>>
Cc: W3C Publishing Working Group <public-publ-wg@w3.org<mailto:public-publ-wg@w3.org>>
Subject: Re: [AudioTF] Agenda 2018-12-14
Resent-From: <public-publ-wg@w3.org<mailto:public-publ-wg@w3.org>>
Resent-Date: Thu, 13 Dec 2018 15:57:38 +0000

On Tue, Dec 11, 2018 at 6:40 AM Matt Garrish <matt.garrish@gmail.com<mailto:matt.garrish@gmail.com>> wrote:
The one “feature” of OCF that everyone seems to hate is that it requires the mimetype file be the first in the ZIP container. That makes packaging an EPUB more complicated than just zipping up all the files, since the mimetype typically won’t get inserted first in general zipping scenarios.

If we remove this restriction from OCF 3.2, then we possibly break the loading of publications in reading systems that won’t process a publication without first encountering the mimetype. I have no idea how many that is, or if it’s common to fall back to finding a mimetype elsewhere in the zip if it’s not first.


Yesterday I made an EPUB without a mimetype, and just zipped it. Changed the file extension to EPUB. It would not load at all in iBooks, Adobe Digital Editions, Kobo, or AZARDI. It worked in Google Play Books. Kindle Previewer did process it, and the resulting Mobi worked in Kindle/Mac.

Dave