[issue1746] ZIP files with archive comments longer than 4k not recognized as valid by zipfile module

[Alan McIntyre]

New submission from Alan McIntyre:

The current behavior of zipfile._EndRecData is to look in the last 4k of
data in a file if it appears it might have an archive comment; this
results in flagging proper ZIP files with comments longer than ~4074
bytes as "not a ZIP file."

I plan on posting a patch for this later, but figured this should be
documented in case I don't get around to it.

----------
components: Library (Lib)
messages: 59411
nosy: alanmcintyre
severity: normal
status: open
title: ZIP files with archive comments longer than 4k not recognized as valid by zipfile module
type: behavior
versions: Python 2.6

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Tracker <report at bugs.python.org>
<http://bugs.python.org/issue1746>
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