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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙfrom __future__ import annotations from contextlib import suppress from uuid import UUID import datetime import ipaddress import re import typing from jsonschema.exceptions import FormatError _FormatCheckCallable = typing.Callable[[object], bool] _F = typing.TypeVar("_F", bound=_FormatCheckCallable) _RaisesType = typing.Union[ typing.Type[Exception], typing.Tuple[typing.Type[Exception], ...], ] class FormatChecker(object): """ A ``format`` property checker. JSON Schema does not mandate that the ``format`` property actually do any validation. If validation is desired however, instances of this class can be hooked into validators to enable format validation. `FormatChecker` objects always return ``True`` when asked about formats that they do not know how to validate. To check a custom format using a function that takes an instance and returns a ``bool``, use the `FormatChecker.checks` or `FormatChecker.cls_checks` decorators. Arguments: formats (~collections.abc.Iterable): The known formats to validate. This argument can be used to limit which formats will be used during validation. """ checkers: dict[ str, tuple[_FormatCheckCallable, _RaisesType], ] = {} def __init__(self, formats: typing.Iterable[str] | None = None): if formats is None: self.checkers = self.checkers.copy() else: self.checkers = dict((k, self.checkers[k]) for k in formats) def __repr__(self): return "".format(sorted(self.checkers)) def checks( self, format: str, raises: _RaisesType = (), ) -> typing.Callable[[_F], _F]: """ Register a decorated function as validating a new format. Arguments: format (str): The format that the decorated function will check. raises (Exception): The exception(s) raised by the decorated function when an invalid instance is found. The exception object will be accessible as the `jsonschema.exceptions.ValidationError.cause` attribute of the resulting validation error. """ def _checks(func: _F) -> _F: self.checkers[format] = (func, raises) return func return _checks @classmethod def cls_checks( cls, format: str, raises: _RaisesType = (), ) -> typing.Callable[[_F], _F]: def _checks(func: _F) -> _F: cls.checkers[format] = (func, raises) return func return _checks def check(self, instance: object, format: str) -> None: """ Check whether the instance conforms to the given format. Arguments: instance (*any primitive type*, i.e. str, number, bool): The instance to check format (str): The format that instance should conform to Raises: FormatError: if the instance does not conform to ``format`` """ if format not in self.checkers: return func, raises = self.checkers[format] result, cause = None, None try: result = func(instance) except raises as e: cause = e if not result: raise FormatError(f"{instance!r} is not a {format!r}", cause=cause) def conforms(self, instance: object, format: str) -> bool: """ Check whether the instance conforms to the given format. Arguments: instance (*any primitive type*, i.e. str, number, bool): The instance to check format (str): The format that instance should conform to Returns: bool: whether it conformed """ try: self.check(instance, format) except FormatError: return False else: return True draft3_format_checker = FormatChecker() draft4_format_checker = FormatChecker() draft6_format_checker = FormatChecker() draft7_format_checker = FormatChecker() draft201909_format_checker = FormatChecker() draft202012_format_checker = FormatChecker() _draft_checkers: dict[str, FormatChecker] = dict( draft3=draft3_format_checker, draft4=draft4_format_checker, draft6=draft6_format_checker, draft7=draft7_format_checker, draft201909=draft201909_format_checker, draft202012=draft202012_format_checker, ) def _checks_drafts( name=None, draft3=None, draft4=None, draft6=None, draft7=None, draft201909=None, draft202012=None, raises=(), ) -> typing.Callable[[_F], _F]: draft3 = draft3 or name draft4 = draft4 or name draft6 = draft6 or name draft7 = draft7 or name draft201909 = draft201909 or name draft202012 = draft202012 or name def wrap(func: _F) -> _F: if draft3: func = _draft_checkers["draft3"].checks(draft3, raises)(func) if draft4: func = _draft_checkers["draft4"].checks(draft4, raises)(func) if draft6: func = _draft_checkers["draft6"].checks(draft6, raises)(func) if draft7: func = _draft_checkers["draft7"].checks(draft7, raises)(func) if draft201909: func = _draft_checkers["draft201909"].checks(draft201909, raises)( func, ) if draft202012: func = _draft_checkers["draft202012"].checks(draft202012, raises)( func, ) # Oy. This is bad global state, but relied upon for now, until # deprecation. See #519 and test_format_checkers_come_with_defaults FormatChecker.cls_checks( draft202012 or draft201909 or draft7 or draft6 or draft4 or draft3, raises, )(func) return func return wrap @_checks_drafts(name="idn-email") @_checks_drafts(name="email") def is_email(instance: object) -> bool: if not isinstance(instance, str): return True return "@" in instance @_checks_drafts( draft3="ip-address", draft4="ipv4", draft6="ipv4", draft7="ipv4", draft201909="ipv4", draft202012="ipv4", raises=ipaddress.AddressValueError, ) def is_ipv4(instance: object) -> bool: if not isinstance(instance, str): return True return bool(ipaddress.IPv4Address(instance)) @_checks_drafts(name="ipv6", raises=ipaddress.AddressValueError) def is_ipv6(instance: object) -> bool: if not isinstance(instance, str): return True address = ipaddress.IPv6Address(instance) return not getattr(address, "scope_id", "") with suppress(ImportError): from fqdn import FQDN @_checks_drafts( draft3="host-name", draft4="hostname", draft6="hostname", draft7="hostname", draft201909="hostname", draft202012="hostname", ) def is_host_name(instance: object) -> bool: if not isinstance(instance, str): return True return FQDN(instance).is_valid with suppress(ImportError): # The built-in `idna` codec only implements RFC 3890, so we go elsewhere. import idna @_checks_drafts( draft7="idn-hostname", draft201909="idn-hostname", draft202012="idn-hostname", raises=(idna.IDNAError, UnicodeError), ) def is_idn_host_name(instance: object) -> bool: if not isinstance(instance, str): return True idna.encode(instance) return True try: import rfc3987 except ImportError: with suppress(ImportError): from rfc3986_validator import validate_rfc3986 @_checks_drafts(name="uri") def is_uri(instance: object) -> bool: if not isinstance(instance, str): return True return validate_rfc3986(instance, rule="URI") @_checks_drafts( draft6="uri-reference", draft7="uri-reference", draft201909="uri-reference", draft202012="uri-reference", raises=ValueError, ) def is_uri_reference(instance: object) -> bool: if not isinstance(instance, str): return True return validate_rfc3986(instance, rule="URI_reference") else: @_checks_drafts( draft7="iri", draft201909="iri", draft202012="iri", raises=ValueError, ) def is_iri(instance: object) -> bool: if not isinstance(instance, str): return True return rfc3987.parse(instance, rule="IRI") @_checks_drafts( draft7="iri-reference", draft201909="iri-reference", draft202012="iri-reference", raises=ValueError, ) def is_iri_reference(instance: object) -> bool: if not isinstance(instance, str): return True return rfc3987.parse(instance, rule="IRI_reference") @_checks_drafts(name="uri", raises=ValueError) def is_uri(instance: object) -> bool: if not isinstance(instance, str): return True return rfc3987.parse(instance, rule="URI") @_checks_drafts( draft6="uri-reference", draft7="uri-reference", draft201909="uri-reference", draft202012="uri-reference", raises=ValueError, ) def is_uri_reference(instance: object) -> bool: if not isinstance(instance, str): return True return rfc3987.parse(instance, rule="URI_reference") with suppress(ImportError): from rfc3339_validator import validate_rfc3339 @_checks_drafts(name="date-time") def is_datetime(instance: object) -> bool: if not isinstance(instance, str): return True return validate_rfc3339(instance.upper()) @_checks_drafts( draft7="time", draft201909="time", draft202012="time", ) def is_time(instance: object) -> bool: if not isinstance(instance, str): return True return is_datetime("1970-01-01T" + instance) @_checks_drafts(name="regex", raises=re.error) def is_regex(instance: object) -> bool: if not isinstance(instance, str): return True return bool(re.compile(instance)) @_checks_drafts( draft3="date", draft7="date", draft201909="date", draft202012="date", raises=ValueError, ) def is_date(instance: object) -> bool: if not isinstance(instance, str): return True return bool(instance.isascii() and datetime.date.fromisoformat(instance)) @_checks_drafts(draft3="time", raises=ValueError) def is_draft3_time(instance: object) -> bool: if not isinstance(instance, str): return True return bool(datetime.datetime.strptime(instance, "%H:%M:%S")) with suppress(ImportError): from webcolors import CSS21_NAMES_TO_HEX import webcolors def is_css_color_code(instance: object) -> bool: return webcolors.normalize_hex(instance) @_checks_drafts(draft3="color", raises=(ValueError, TypeError)) def is_css21_color(instance: object) -> bool: if ( not isinstance(instance, str) or instance.lower() in CSS21_NAMES_TO_HEX ): return True return is_css_color_code(instance) with suppress(ImportError): import jsonpointer @_checks_drafts( draft6="json-pointer", draft7="json-pointer", draft201909="json-pointer", draft202012="json-pointer", raises=jsonpointer.JsonPointerException, ) def is_json_pointer(instance: object) -> bool: if not isinstance(instance, str): return True return bool(jsonpointer.JsonPointer(instance)) # TODO: I don't want to maintain this, so it # needs to go either into jsonpointer (pending # https://github.com/stefankoegl/python-json-pointer/issues/34) or # into a new external library. @_checks_drafts( draft7="relative-json-pointer", draft201909="relative-json-pointer", draft202012="relative-json-pointer", raises=jsonpointer.JsonPointerException, ) def is_relative_json_pointer(instance: object) -> bool: # Definition taken from: # https://tools.ietf.org/html/draft-handrews-relative-json-pointer-01#section-3 if not isinstance(instance, str): return True non_negative_integer, rest = [], "" for i, character in enumerate(instance): if character.isdigit(): # digits with a leading "0" are not allowed if i > 0 and int(instance[i - 1]) == 0: return False non_negative_integer.append(character) continue if not non_negative_integer: return False rest = instance[i:] break return (rest == "#") or bool(jsonpointer.JsonPointer(rest)) with suppress(ImportError): import uri_template @_checks_drafts( draft6="uri-template", draft7="uri-template", draft201909="uri-template", draft202012="uri-template", ) def is_uri_template(instance: object) -> bool: if not isinstance(instance, str): return True return uri_template.validate(instance) with suppress(ImportError): import isoduration @_checks_drafts( draft201909="duration", draft202012="duration", raises=isoduration.DurationParsingException, ) def is_duration(instance: object) -> bool: if not isinstance(instance, str): return True return bool(isoduration.parse_duration(instance)) @_checks_drafts( draft201909="uuid", draft202012="uuid", raises=ValueError, ) def is_uuid(instance: object) -> bool: if not isinstance(instance, str): return True UUID(instance) return all(instance[position] == "-" for position in (8, 13, 18, 23))