[Python-Dev] Changing string constants to byte arrays ([Python-checkins] r55119 (original) (raw)

[Python-Dev] Changing string constants to byte arrays ([Python-checkins] r55119 - in python/branches/py3k-struni/Lib: codecs.py test/test_codecs.py)

M.-A. Lemburg mal at egenix.com
Fri May 4 15:23:35 CEST 2007

Hi Walter,

if the bytes type does turn out to be a mutable type as suggested in PEP 358, then please make sure that no code (C code in particular), relies on the constantness of these byte objects.

This is especially important when it comes to codecs, since the error callback logic would allow the callback to manipulate the byte object contents and length without the codec taking note of this change.

I expect there to be other places in the interpreter which would break as well.

Otherwise, you end up opening the door for segfaults and easy DOS attacks on Python3.

Regards,

Marc-Andre Lemburg eGenix.com

Professional Python Services directly from the Source (#1, May 04 2007)

Python/Zope Consulting and Support ... http://www.egenix.com/ mxODBC.Zope.Database.Adapter ... http://zope.egenix.com/ mxODBC, mxDateTime, mxTextTools ... http://python.egenix.com/

:::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! ::::

eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611

On 2007-05-04 15:05, walter.doerwald wrote:

Author: walter.doerwald Date: Fri May 4 15:05:09 2007 New Revision: 55119

Modified: python/branches/py3k-struni/Lib/codecs.py python/branches/py3k-struni/Lib/test/testcodecs.py Log: Make the BOM constants in codecs.py bytes. Make the buffered input for decoders a bytes object.

More information about the Python-Dev mailing list