[Zope] Zope Product - zipfile not compressing

[Istvan Albert]

Hello folks,

I wrote a custom zope product that I wanted to use
create a zip archive from some of the files on the
filesystem and then send this zipfile as a download.

The product works, the zipfile gets created and all the files
are there, only there appears to be no compression at all.
Everything is just stored. Here is how I create the archive:

zip = zipfile.ZipFile(file_name, mode='w', compression=zipfile.ZIP_DEFLATED)

then I keep adding with writestr:

zip.writestr(zinfo, obj_data)

any thoughts?

thanks and best regards.

Istvan.