Message 41170 - Python tracker

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Author	ahlstromjc
Date	2002年09月19日.19:29:21
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Module zipfile can not read ZIP archives which have appended archive comments. I have only gotten two complaints about this, but I feel that this limitation should be removed. Archive comments are appended to ZIP archives, and can be up to 64K bytes long. Reading them would require searching the end of the archive for the end record magic number. The attached patch will (1) seek and verify a zero length comment; and if this fails (2) search the last 4K bytes of the file for a comment. The 4K limitation (down from 64K) is for efficiency. This was tested on Python 2.2.1, but zipfile.py has changed since then. So the patch was hand edited into today's CVS zipfile.py version.

Content

Module zipfile can not read ZIP archives which have
appended archive comments. I have only gotten two
complaints about this, but I feel that this limitation
should be removed. Archive comments are appended to
ZIP archives, and can be up to 64K bytes long. Reading
them would require searching the end of the archive for
the end record magic number.
The attached patch will (1) seek and verify a zero
length comment; and if this fails (2) search the last
4K bytes of the file for a comment. The 4K limitation
(down from 64K) is for efficiency.
This was tested on Python 2.2.1, but zipfile.py has
changed since then. So the patch was hand edited into
today's CVS zipfile.py version.

History
Date	User	Action	Args
2007年08月23日 15:15:21	admin	link	issue611760 messages
2007年08月23日 15:15:21	admin	create

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