New submission from Kovid Goyal <ko...@kovidgoyal.net>:
Hi,
I am the primary developer of calibre (http:/calibre-ebook.com) and yesterday I
released an upgrade of calibre based on python 2.7. Here is a small sampling of
all the diverse errors that my users experienced, related to reading mimetypes
from the registry:
1. Permission denied if running from non privileged account
Traceback (most recent call last):
File "site.py", line 103, in main
File "site.py", line 84, in run_entry_point
File "site-packages\calibre\__init__.py", line 31, in <module>
File "mimetypes.py", line 344, in add_type
File "mimetypes.py", line 355, in init
File "mimetypes.py", line 261, in read_windows_registry
WindowsError: [Error 5] Acceso denegado (Access not allowed)
The fix for this is to trap WindowsError and ignore it in mimetypes.py
2. Mishandling of encoding of registry entries
Traceback (most recent call last):
File "site.py", line 103, in main
File "site.py", line 84, in run_entry_point
File "site-packages\calibre\__init__.py", line 31, in <module>
File "mimetypes.py", line 344, in add_type
File "mimetypes.py", line 355, in init
File "mimetypes.py", line 260, in read_windows_registry
File "mimetypes.py", line 250, in enum_types
UnicodeDecodeError: 'utf8' codec can't decode byte 0xe0 in position 0: invalid
continuation byte
The fix for this is to change
except UnicodeEncodeError
to
except ValueError
3. python -c "import mimetypes; print mimetypes.guess_type('img.jpg')"
('image/pjpeg', None)
Where the output should have been
(image/jpeg', None)
The fix for this is to load the registry entries before the default entris
defined in mimetypes.py
Of course, IMHO, the best possible fix is to simply remove the reading of
mimetypes from the registry. But that is up to whoever maintains this module.
Duplicate (less comprehensive) tickets ont his isuue in your traceker already
are: 9291, 10490, 104314
If the maintainer of this module is unable to fix these issues, let me know and
I will submit a patch, either removing _winreg or fixing the issues
individually.
----------
components: Library (Lib)
messages: 122542
nosy: kovid
priority: normal
severity: normal
status: open
title: mimetypes reading from registry in windows completely broken
versions: Python 2.7
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue10551>
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