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30 lines
894 B
Python
30 lines
894 B
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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Python 3's "zipfile" has an annoying bug where the `external_attr` field
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of a ZIP file cannot be set to 0. However, if the original DRMed ZIP has
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that set to 0 then we want the DRM-free ZIP to have that as 0, too.
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See https://github.com/python/cpython/issues/87713
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We cannot just set the "external_attr" to 0 as the code to save the ZIP
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resets that variable.
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So, here's a class that inherits from ZipInfo and ensures that EVERY
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read access to that variable will return a 0 ...
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"""
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import zipfile
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class ZeroedZipInfo(zipfile.ZipInfo):
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def __init__(self, zinfo):
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for k in self.__slots__:
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if hasattr(zinfo, k):
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setattr(self, k, getattr(zinfo, k))
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def __getattribute__(self, name):
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if name == "external_attr":
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return 0
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return object.__getattribute__(self, name)
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