I believe I may have found the issue. I was using the validator
incorrectly. I was passing the string to `__init__` like so `
URLValidator('\\')`, instead of passing it to the `__call__` method like
this `URLValidator()('\\')`.
On Tuesday, March 4, 2014 4:13:12 PM UTC-8, rectang...@gmail.com wrote:
>
> When entering two backslashes into the URL validator it raises an
> `sre_constants.error`. As per the
> docs<https://docs.djangoproject.com/en/dev/ref/validators/#writing-validators>,
> it
> seems like the validator should catch this and then chain a `
> ValidationError<https://docs.djangoproject.com/en/dev/ref/exceptions/#django.core.exceptions.ValidationError>`
>
> to the exception. This appears to be an issue with Django's integration
> with Python's regex implementation. This may just be my misunderstanding of
> the way Django handles validation, but it seems like *any *form
> of invalid input should raise a
> `ValidationError<https://docs.djangoproject.com/en/dev/ref/exceptions/#django.core.exceptions.ValidationError>
> `.
>
> I found this while running Django 1.6.2 on Python 3.3.0 on Windows 7.
>
> This session reproduces the bug on my system.
>
> >>> from django.core.validators import URLValidator
> >>> URLValidator('\\')
> Traceback (most recent call last):
> File "C:\Python33\lib\sre_parse.py", line 195, in __next
> c = self.string[self.index + 1]
> IndexError: string index out of range
>
> During handling of the above exception, another exception occurred:
>
> Traceback (most recent call last):
> File "<string>", line 301, in runcode
> File "<interactive input>", line 1, in <module>
> File "C:\Python33\lib\site-packages\django\core\validators.py", line 32,
> in __init__
> self.regex = re.compile(self.regex)
> File "C:\Python33\lib\re.py", line 214, in compile
> return _compile(pattern, flags)
> File "C:\Python33\lib\functools.py", line 258, in wrapper
> result = user_function(*args, **kwds)
> File "C:\Python33\lib\re.py", line 274, in _compile
> return sre_compile.compile(pattern, flags)
> File "C:\Python33\lib\sre_compile.py", line 493, in compile
> p = sre_parse.parse(p, flags)
> File "C:\Python33\lib\sre_parse.py", line 717, in parse
> source = Tokenizer(str)
> File "C:\Python33\lib\sre_parse.py", line 183, in __init__
> self.__next()
> File "C:\Python33\lib\sre_parse.py", line 197, in __next
> raise error("bogus escape (end of line)")
> sre_constants.error: bogus escape (end of line)
>
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