Opened 10 years ago

Closed 10 years ago

Last modified 10 years ago

#23593 closed Bug (fixed)

UnicodeDecodeError when handling uncaught exception with UTF-8 in URL

Reported by: André Cruz Owned by: Tim Graham
Component: HTTP handling Version: 1.7
Severity: Release blocker Keywords: UnicodeDecodeError
Cc: Triage Stage: Accepted
Has patch: yes Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no


When DEBUG==False, there is UTF-8 in URL, and an uncaught exception occurs:

Traceback (most recent call last):
  File "/Users/andre/work/penv/discosite/lib/python2.7/site-packages/django/core/handlers/", line 187, in __call__
    response = self.get_response(request)
  File "/Users/andre/work/penv/discosite/lib/python2.7/site-packages/django/core/handlers/", line 199, in get_response
    response = self.handle_uncaught_exception(request, resolver, sys.exc_info())
  File "/Users/andre/work/penv/discosite/lib/python2.7/site-packages/django/core/handlers/", line 231, in handle_uncaught_exception
    'request': request
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/logging/", line 1175, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/logging/", line 1268, in _log
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/logging/", line 1278, in handle
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/logging/", line 1318, in callHandlers
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/logging/", line 749, in handle
  File "/Users/andre/work/penv/discosite/lib/python2.7/site-packages/django/utils/", line 124, in emit
    message = "%s\n\nRequest repr(): %s" % (self.format(record), request_repr)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2 in position 30: ordinal not in range(128)

Example request:

$ curl "http://localhost:8000/%5BSC%5D%20TIC%207%C2%BAC"

This did not happen < 1.7.

Change History (7)

comment:1 by Tim Graham, 10 years ago

I couldn't reproduce this using the code from the tutorial:

$ curl "http://localhost:8000/%5BSC%5D%20TIC%207%C2%BAC"
<h1>Not Found</h1><p>The requested URL /[SC] TIC 7ºC was not found on this server.</p>

Could you provide more details? Ideally, a test case for Django's test suite if possible.

comment:2 by André Cruz, 10 years ago

As I mentioned, this happens when DEBUG=False, an exception is thrown while servicing the request, and there is UTF-8 in the URL. It seems you only reproduced the "UTF-8 in the URL part"...

You can put the following url pattern:

urlpatterns = patterns('',
    url(r'^(*)$', 'utils.cross_domain.cross_domain_xml'),

and this will cause an exception. Then self.format(record) will end up: (notice it's unicode)

u'Internal Server Error: /[SC] TIC 7\xbaC\nTraceback (most recent call last):\n  File "/Users/andre/work/penv/discosite/lib/python2.7/site-packages/django/core/handlers/", line 87, in get_response\n    response = middleware_method(request)\n  File "/Users/andre/work/penv/discosite/lib/python2.7/site-packages/django/middleware/", line 72, in process_request\n    if (not urlresolvers.is_valid_path(request.path_info, urlconf) and\n  File "/Users/andre/work/penv/discosite/lib/python2.7/site-packages/django/core/", line 614, in is_valid_path\n    resolve(path, urlconf)\n  File "/Users/andre/work/penv/discosite/lib/python2.7/site-packages/django/core/", line 489, in resolve\n    return get_resolver(urlconf).resolve(path)\n  File "/Users/andre/work/penv/discosite/lib/python2.7/site-packages/django/core/", line 340, in resolve\n    sub_match = pattern.resolve(new_path)\n  File "/Users/andre/work/penv/discosite/lib/python2.7/site-packages/django/core/", line 211, in resolve\n    match =\n  File "/Users/andre/work/penv/discosite/lib/python2.7/site-packages/django/core/", line 179, in regex\n    (regex, six.text_type(e)))\nImproperlyConfigured: "^(*)$" is not a valid regular expression: nothing to repeat'

comment:3 by Tim Graham, 10 years ago

Has patch: set
Needs tests: set
Severity: NormalRelease blocker
Triage Stage: UnreviewedAccepted
Version: master1.7

Adding from __future__ import unicode_literals to django/utils/ seems to fix the issue. We also need a regression test and a mention in the 1.7.1 release notes.

comment:4 by Tim Graham, 10 years ago

Owner: changed from nobody to Tim Graham
Status: newassigned

comment:5 by Tim Graham, 10 years ago

Needs tests: unset

comment:6 by Tim Graham <timograham@…>, 10 years ago

Resolution: fixed
Status: assignedclosed

In 9dff5ce7c70780f4ee91567d98dba227093b49e2:

Fixed #23593 -- Fixed crash in AdminEmailHandler with non-ASCII characters in request.

Thanks edevil for the report and Simon Charette for review.

comment:7 by Tim Graham <timograham@…>, 10 years ago

In 96f022203a552fef19403c01b12fa6d30da560a0:

[1.7.x] Fixed #23593 -- Fixed crash in AdminEmailHandler with non-ASCII characters in request.

Thanks edevil for the report and Simon Charette for review.

Backport of 9dff5ce7c7 from master

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