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Stop uuid() from accepting urn:/braced forms via dead-code fallback by mathewOracle · Pull Request #480 · python-validators/validators · GitHub

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Stop uuid() from accepting urn:/braced forms via dead-code fallback #480

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Stop uuid() from accepting urn:/braced forms via dead-code fallback #480

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12 changes: 6 additions & 6 deletions src/validators/uuid.py
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Original file line number Diff line number Diff line change
Expand Up @@ -35,9 +35,9 @@ def uuid(value: Union[str, UUID], /):
return False
if isinstance(value, UUID):
return True
try:
return UUID(value) or re.match(
r"^[0-9a-fA-F]{8}-([0-9a-fA-F]{4}-){3}[0-9a-fA-F]{12}$", value
)
except ValueError:
return False
# Deliberately not delegating to the stdlib UUID() constructor here:
# it accepts far more than this validator documents or tests, e.g.
# `urn:uuid:...`-prefixed and `{braced}` forms, and any UUID version
# (not just v4). A regex keeps acceptance limited to the plain
# (optionally dashed) hex form shown in the docstring and tests.
return bool(re.match(r"^[0-9a-fA-F]{8}-?([0-9a-fA-F]{4}-?){3}[0-9a-fA-F]{12}$", value))
7 changes: 7 additions & 0 deletions tests/test_uuid.py
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,13 @@ def test_returns_true_on_valid_uuid(value: Union[str, UUID]):
("2bc1c94f-0deb-43e9-92a1-4775189ec9f",),
("gbc1c94f-0deb-43e9-92a1-4775189ec9f8",),
("2bc1c94f 0deb-43e9-92a1-4775189ec9f8",),
# Regression: the previous implementation delegated to the stdlib
# UUID() constructor, which is far more permissive than this
# validator's own docstring/regex -- it also accepts urn:-prefixed
# and {braced} forms, neither of which were ever documented,
# tested, or intended to pass here.
("urn:uuid:2bc1c94f-0deb-43e9-92a1-4775189ec9f8",),
("{2bc1c94f-0deb-43e9-92a1-4775189ec9f8}",),
],
)
def test_returns_failed_validation_on_invalid_uuid(value: Union[str, UUID]):
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