EPUB Zip does not pass epubcheck

[drmacro]

EPUB Zip does not pass epubcheck

[paperdigits]

Could this be an OS related issue? I have found the windows native zip function to be hit and miss, but this is only anecdotal, I can't provide any hard evidence.

I can try and give this a go on Debian this weekend, if I have time.

On October 31, 2014 11:11:01 AM PDT, Eliot Kimber [email protected] wrote:

Getting this failure:

The mimetype file has an extension of length 20. No filename extensions
are permitted for the mimetype file.

From epubcheck for the EPUB Zip file generated by the Ant task. Have
asked Radu and Jean Kaplansky for guidance. Using Oxygen's archive
browser to open and save the EPUB file resolves the issue, so it must
be something with how Ant's Zip implementation works.

Would like to avoid having custom Java code just to make the Zip file.

---

Reply to this email directly or view it on GitHub:
#21

[scalderwood]

I was getting a different error message: Mimetype entry must not have an extra field in its ZIP header

And I fixed that by adding this to the zip task for the mimetype:
zip64Mode="never"

Not sure if that will solve your problem or not, Eliot; I don't run into your problem when executing the ant code against my ePub source files (whether 2 or 3). The above error happens with Ant 1.9.3 on OS X and epubcheck 3.0.1.

[raducoravu]

Some time ago one of my coleagues added an issue which explains why zip64Mode should be added to the ANT task on the old SourceForge DITA For Publishers List:

https://sourceforge.net/p/dita4publishers/bugs/106/

So you must add this flag if you are using ANT 1.9 or newer to publish.

[drmacro]

I'm using Ant 1.8.5, so zip64Mode="never" isn't supported.

Comparing the Zip produced by Ant and by Oxygen at the byte level, the difference is an extended field in the local file header for the mimetype file, consisting of 20 null bytes. So Ant is adding that extended field. Without having researched it, I'm assuming that Ant 1.9 fixes this issue with the zip64Mode option.

[drmacro]

I upgraded to Ant 1.9.4 and confirmed that with @zip64Mode="never" specified that the EPUB file passes epubcheck.

[raducoravu]

ANT 1.9.0 was released in March 7, 2013, so probably it's safe to assume most users use ANT 1.9.0 or newer, so setting @zip64Mode="never" should work for most users.

[drmacro]

Unfortunately, it appears that the OT 1.8.5 comes with Ant 1.8.4 out of the box, so I can't assume it's installed.

I can make a check in the Ant script for the Ant version and issue a message when the version is not 1.9.1 or greater.

[drmacro]

Fixed by #26