[issue3997] zipfile and winzip

[vali]

New submission from vali <[EMAIL PROTECTED]>:

using ZipFile library with Python 2.6 or an earlier version creates
archived files that are not compatible with windows compress or Winzip.
Other programs like 7-Zip will not have a problem with the format. 

Bug Description:
if it is attempted to create an archive with more than 65535 (e.g 2^16 +
10)  files winzip or windows compress will show only what is above 65535
(in this case 9 file) 

The attached script tries to create an archive with 2^16 + 1 files and
compress or winzip will show an empty archive.

--
components: Extension Modules
files: bug.py
messages: 74030
nosy: vgeorge
severity: normal
status: open
title: zipfile and winzip
type: behavior
versions: Python 2.6
Added file: http://bugs.python.org/file11654/bug.py

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[issue3997] zipfile and winzip

[vali]

vali <[EMAIL PROTECTED]> added the comment:

The version I used should not have this limitation as archives created
with other languages as Java or C# opens fine in WinZip 11.2 evaluation
version. Also the same issue can be observed in Windows compress utility.

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[issue3997] zipfile and winzip

[vali]

vali <[EMAIL PROTECTED]> added the comment:

Thank you for the quick fix. I could verify that the issue is fixed in
python 2.6 when I use WinZip to open an archive with more than 2^16
files created with attached script (bug.py). However the windows native
compress utility does not seem to be able to recognize the files that
have more than 2^16 files (the error says that the archive is not
valid). However, if I try to create an archive using WinZip or 7zip with
exactly the same files, windows compress utility is able to open the
archive. The same thing would apply if I create the archive using zlib
C# library.

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[issue3997] zipfile and winzip

[vali]

vali <[EMAIL PROTECTED]> added the comment:

I could verify that the patch works with both the Windows Compress
utility, WinZip and 7zip. 
Thank you!

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