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from __future__ import unicode_literals
from . import Tags, Warning, register
@register(Tags.urls)
def check_url_config(app_configs, **kwargs):
from django.core.urlresolvers import get_resolver
resolver = get_resolver()
return check_resolver(resolver)
def check_resolver(resolver):
"""
Recursively check the resolver.
"""
from django.core.urlresolvers import RegexURLPattern, RegexURLResolver
warnings = []
for pattern in resolver.url_patterns:
if isinstance(pattern, RegexURLResolver):
warnings.extend(check_include_trailing_dollar(pattern))
# Check resolver recursively
warnings.extend(check_resolver(pattern))
elif isinstance(pattern, RegexURLPattern):
warnings.extend(check_pattern_name(pattern))
warnings.extend(check_pattern_startswith_slash(pattern))
return warnings
def describe_pattern(pattern):
"""
Format the URL pattern for display in warning messages.
"""
description = "'{}'".format(pattern.regex.pattern)
if getattr(pattern, 'name', False):
description += " [name='{}']".format(pattern.name)
return description
def check_include_trailing_dollar(pattern):
"""
Check that include is not used with a regex ending with a dollar.
"""
regex_pattern = pattern.regex.pattern
if regex_pattern.endswith('$') and not regex_pattern.endswith('\$'):
warning = Warning(
"Your URL pattern {} uses include with a regex ending with a '$'. "
"Remove the dollar from the regex to avoid problems including "
"URLs.".format(describe_pattern(pattern)),
id="urls.W001",
)
return [warning]
else:
return []
def check_pattern_startswith_slash(pattern):
"""
Check that the pattern does not begin with a forward slash.
"""
regex_pattern = pattern.regex.pattern
if regex_pattern.startswith('/') or regex_pattern.startswith('^/'):
warning = Warning(
"Your URL pattern {} has a regex beginning with a '/'. "
"Remove this slash as it is unnecessary.".format(describe_pattern(pattern)),
id="urls.W002",
)
return [warning]
else:
return []
def check_pattern_name(pattern):
"""
Check that the pattern name does not contain a colon.
"""
if pattern.name is not None and ":" in pattern.name:
warning = Warning(
"Your URL pattern {} has a name including a ':'. Remove the colon, to "
"avoid ambiguous namespace references.".format(describe_pattern(pattern)),
id="urls.W003",
)
return [warning]
else:
return []
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