"""
Copied from raven-python. Used for
`DjangoIntegration(transaction_fron="raven_legacy")`.
"""
from __future__ import absolute_import
import re
if False:
from django.urls.resolvers import URLResolver # type: ignore
from typing import Dict
from typing import List
from typing import Optional
from django.urls.resolvers import URLPattern # type: ignore
from typing import Tuple
from typing import Union
from re import Pattern # type: ignore
try:
from django.urls import get_resolver # type: ignore
except ImportError:
from django.core.urlresolvers import get_resolver # type: ignore
def get_regex(resolver_or_pattern):
# type: (Union[URLPattern, URLResolver]) -> Pattern
"""Utility method for django's deprecated resolver.regex"""
try:
regex = resolver_or_pattern.regex
except AttributeError:
regex = resolver_or_pattern.pattern.regex
return regex
class RavenResolver(object):
_optional_group_matcher = re.compile(r"\(\?\:([^\)]+)\)")
_named_group_matcher = re.compile(r"\(\?P<(\w+)>[^\)]+\)")
_non_named_group_matcher = re.compile(r"\([^\)]+\)")
# [foo|bar|baz]
_either_option_matcher = re.compile(r"\[([^\]]+)\|([^\]]+)\]")
_camel_re = re.compile(r"([A-Z]+)([a-z])")
_cache = {} # type: Dict[URLPattern, str]
def _simplify(self, pattern):
# type: (str) -> str
r"""
Clean up urlpattern regexes into something readable by humans:
From:
> "^(?P<sport_slug>\w+)/athletes/(?P<athlete_slug>\w+)/$"
To:
> "{sport_slug}/athletes/{athlete_slug}/"
"""
# remove optional params
# TODO(dcramer): it'd be nice to change these into [%s] but it currently
# conflicts with the other rules because we're doing regexp matches
# rather than parsing tokens
result = self._optional_group_matcher.sub(lambda m: "%s" % m.group(1), pattern)
# handle named groups first
result = self._named_group_matcher.sub(lambda m: "{%s}" % m.group(1), result)
# handle non-named groups
result = self._non_named_group_matcher.sub("{var}", result)
# handle optional params
result = self._either_option_matcher.sub(lambda m: m.group(1), result)
# clean up any outstanding regex-y characters.
result = (
result.replace("^", "")
.replace("$", "")
.replace("?", "")
.replace("//", "/")
.replace("\\", "")
)
return result
def _resolve(self, resolver, path, parents=None):
# type: (URLResolver, str, Optional[List[URLResolver]]) -> Optional[str]
match = get_regex(resolver).search(path) # Django < 2.0
if not match:
return None
if parents is None:
parents = [resolver]
elif resolver not in parents:
parents = parents + [resolver]
new_path = path[match.end() :]
for pattern in resolver.url_patterns:
# this is an include()
if not pattern.callback:
match = self._resolve(pattern, new_path, parents)
if match:
return match
continue
elif not get_regex(pattern).search(new_path):
continue
try:
return self._cache[pattern]
except KeyError:
pass
prefix = "".join(self._simplify(get_regex(p).pattern) for p in parents)
result = prefix + self._simplify(get_regex(pattern).pattern)
if not result.startswith("/"):
result = "/" + result
self._cache[pattern] = result
return result
return None
def resolve(
self,
path, # type: str
urlconf=None, # type: Union[None, Tuple[URLPattern, URLPattern, URLResolver], Tuple[URLPattern]]
):
# type: (...) -> str
resolver = get_resolver(urlconf)
match = self._resolve(resolver, path)
return match or path
LEGACY_RESOLVER = RavenResolver()
|