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[3.14] gh-72680: Fix false positives when using zipfile.is_zipfile() (GH-134250)#134401
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…ythonGH-134250)bpo-28494: Improve zipfile.is_zipfile reliabilityThe zipfile.is_zipfile function would only search for the EndOfZipfilesection header. This failed to correctly identify non-zipfiles thatcontained this header. Now the zipfile.is_zipfile function verifiesthe first central directory entry.Changes:* Extended zipfile.is_zipfile to verify zipfile catalog* Added tests to validate failure of binary non-zipfiles* Reuse 'concat' handling for is_zipfile(cherry picked from commit1298511)Co-authored-by: Tim Hatch <timhatch@netflix.com>Co-authored-by: John Jolly <john.jolly@gmail.com>
af428a3 intopython:3.14 45 checks passed
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bpo-28494: Improve zipfile.is_zipfile reliability
The zipfile.is_zipfile function would only search for the EndOfZipfile
section header. This failed to correctly identify non-zipfiles that
contained this header. Now the zipfile.is_zipfile function verifies
the first central directory entry.
Changes:
(cherry picked from commit1298511)
Co-authored-by: Tim Hatchtimhatch@netflix.com
Co-authored-by: John Jollyjohn.jolly@gmail.com