[issue34472] zipfile: does not include optional descriptor signature

2018-08-23 Thread Silas Sewell 


New submission from Silas Sewell :

When adding a fileobj that is not seekable to a zip using the zipfile module, 
the optional signature value 0x08074b50 is not included. This breaks certain 
zip implementations, including the builtin MacOS Archive Utility.

See https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT sections 
4.3.9.3 and 4.3.9.4

--
components: Library (Lib)
files: zip_stream_example.py
messages: 323943
nosy: silas
priority: normal
severity: normal
status: open
title: zipfile: does not include optional descriptor signature
versions: Python 3.5, Python 3.6, Python 3.7, Python 3.8
Added file: https://bugs.python.org/file47760/zip_stream_example.py

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[issue34472] zipfile: does not include optional descriptor signature

2018-08-23 Thread Silas Sewell 


Change by Silas Sewell :


--
keywords: +patch
pull_requests: +8348
stage:  -> patch review

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