On The MIME Type of ePUBs

baskerville · 06-12-2018, 07:22 AM

The MIME type of an ePUB file should be application/epub+zip.

You can find non-conforming ePUBs within your library with:

Code:

file --mime-type **/*.epub | grep -v 'application/epub+zip'

This can happen if the mimetype file:

You can solve the problem by unpacking the ePUB and repacking it with:

Code:

[ -e mimetype ] || printf '%s' 'application/epub+zip' > mimetype
zip -X -Z store abc.epub mimetype
zip -r abc.epub . -x mimetype

06-12-2018, 07:22 AM	#1
baskerville Evangelist Posts: 446 Karma: 305160 Join Date: Aug 2015 Device: Kobo Glo HD, Kobo Aura ONE	On The MIME Type of ePUBs The MIME type of an ePUB file should be application/epub+zip. You can find non-conforming ePUBs within your library with: Code: file --mime-type */.epub \| grep -v 'application/epub+zip' This can happen if the mimetype file: Is missing. Isn't the first entry. Is compressed instead of stored. Has extra fields. Contains the wrong MIME type (seems unlikely). You can solve the problem by unpacking the ePUB and repacking it with: Code: [ -e mimetype ] \|\| printf '%s' 'application/epub+zip' > mimetype zip -X -Z store abc.epub mimetype zip -r abc.epub . -x mimetype

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