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From: candycanearter07 <candycanearter07@candycanearter07.nomail.afraid>
Newsgroups: comp.os.linux.advocacy
Subject: Re: Something I Never Fucking Knew
Date: Mon, 24 Jun 2024 06:20:04 -0000 (UTC)
Organization: the-candyden-of-code
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Farley Flud <ff@linux.rocks> wrote at 10:57 this Sunday (GMT):
> On Sun, 23 Jun 2024 10:39:54 +0000, Farley Flud wrote:
>
>> 
>> It seems that the EPUB contains some sort of extra data that
>> will distinguish it from an ordinary zip file.
>> 
>
> That extra data is an uncompressed MIME type block.
>
> So the ZIP format is not actually a pure ZIP format.
>
> This also explains why an EPUB can't be unzipped, edited,
> and then zipped again.  The result will not be an EPUB. 


So, you'd just need to edit the file to add the header?
-- 
user <candycane> is generated from /dev/urandom