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477 lines
16 KiB
477 lines
16 KiB
from fractions import Fraction
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from urllib.parse import urldefrag, urljoin
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import re
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from jsonschema._utils import (
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ensure_list,
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equal,
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extras_msg,
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find_additional_properties,
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find_evaluated_item_indexes_by_schema,
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find_evaluated_property_keys_by_schema,
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unbool,
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uniq,
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)
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from jsonschema.exceptions import FormatError, ValidationError
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def patternProperties(validator, patternProperties, instance, schema):
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if not validator.is_type(instance, "object"):
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return
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for pattern, subschema in patternProperties.items():
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for k, v in instance.items():
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if re.search(pattern, k):
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yield from validator.descend(
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v, subschema, path=k, schema_path=pattern,
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)
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def propertyNames(validator, propertyNames, instance, schema):
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if not validator.is_type(instance, "object"):
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return
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for property in instance:
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yield from validator.descend(instance=property, schema=propertyNames)
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def additionalProperties(validator, aP, instance, schema):
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if not validator.is_type(instance, "object"):
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return
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extras = set(find_additional_properties(instance, schema))
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if validator.is_type(aP, "object"):
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for extra in extras:
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yield from validator.descend(instance[extra], aP, path=extra)
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elif not aP and extras:
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if "patternProperties" in schema:
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if len(extras) == 1:
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verb = "does"
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else:
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verb = "do"
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joined = ", ".join(repr(each) for each in sorted(extras))
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patterns = ", ".join(
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repr(each) for each in sorted(schema["patternProperties"])
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)
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error = f"{joined} {verb} not match any of the regexes: {patterns}"
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yield ValidationError(error)
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else:
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error = "Additional properties are not allowed (%s %s unexpected)"
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yield ValidationError(error % extras_msg(extras))
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def items(validator, items, instance, schema):
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if not validator.is_type(instance, "array"):
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return
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prefix = len(schema.get("prefixItems", []))
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total = len(instance)
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if items is False and total > prefix:
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message = f"Expected at most {prefix} items, but found {total}"
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yield ValidationError(message)
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else:
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for index in range(prefix, total):
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yield from validator.descend(
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instance=instance[index],
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schema=items,
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path=index,
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)
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def additionalItems(validator, aI, instance, schema):
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if (
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not validator.is_type(instance, "array")
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or validator.is_type(schema.get("items", {}), "object")
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):
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return
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len_items = len(schema.get("items", []))
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if validator.is_type(aI, "object"):
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for index, item in enumerate(instance[len_items:], start=len_items):
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yield from validator.descend(item, aI, path=index)
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elif not aI and len(instance) > len(schema.get("items", [])):
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error = "Additional items are not allowed (%s %s unexpected)"
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yield ValidationError(
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error % extras_msg(instance[len(schema.get("items", [])):]),
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)
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def const(validator, const, instance, schema):
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if not equal(instance, const):
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yield ValidationError(f"{const!r} was expected")
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def contains(validator, contains, instance, schema):
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if not validator.is_type(instance, "array"):
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return
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matches = 0
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min_contains = schema.get("minContains", 1)
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max_contains = schema.get("maxContains", len(instance))
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for each in instance:
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if validator.evolve(schema=contains).is_valid(each):
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matches += 1
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if matches > max_contains:
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yield ValidationError(
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"Too many items match the given schema "
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f"(expected at most {max_contains})",
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validator="maxContains",
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validator_value=max_contains,
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)
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return
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if matches < min_contains:
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if not matches:
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yield ValidationError(
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f"{instance!r} does not contain items "
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"matching the given schema",
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)
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else:
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yield ValidationError(
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"Too few items match the given schema (expected at least "
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f"{min_contains} but only {matches} matched)",
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validator="minContains",
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validator_value=min_contains,
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)
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def exclusiveMinimum(validator, minimum, instance, schema):
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if not validator.is_type(instance, "number"):
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return
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if instance <= minimum:
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yield ValidationError(
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f"{instance!r} is less than or equal to "
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f"the minimum of {minimum!r}",
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)
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def exclusiveMaximum(validator, maximum, instance, schema):
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if not validator.is_type(instance, "number"):
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return
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if instance >= maximum:
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yield ValidationError(
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f"{instance!r} is greater than or equal "
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f"to the maximum of {maximum!r}",
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)
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def minimum(validator, minimum, instance, schema):
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if not validator.is_type(instance, "number"):
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return
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if instance < minimum:
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message = f"{instance!r} is less than the minimum of {minimum!r}"
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yield ValidationError(message)
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def maximum(validator, maximum, instance, schema):
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if not validator.is_type(instance, "number"):
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return
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if instance > maximum:
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message = f"{instance!r} is greater than the maximum of {maximum!r}"
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yield ValidationError(message)
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def multipleOf(validator, dB, instance, schema):
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if not validator.is_type(instance, "number"):
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return
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if isinstance(dB, float):
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quotient = instance / dB
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try:
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failed = int(quotient) != quotient
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except OverflowError:
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# When `instance` is large and `dB` is less than one,
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# quotient can overflow to infinity; and then casting to int
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# raises an error.
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#
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# In this case we fall back to Fraction logic, which is
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# exact and cannot overflow. The performance is also
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# acceptable: we try the fast all-float option first, and
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# we know that fraction(dB) can have at most a few hundred
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# digits in each part. The worst-case slowdown is therefore
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# for already-slow enormous integers or Decimals.
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failed = (Fraction(instance) / Fraction(dB)).denominator != 1
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else:
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failed = instance % dB
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if failed:
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yield ValidationError(f"{instance!r} is not a multiple of {dB}")
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def minItems(validator, mI, instance, schema):
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if validator.is_type(instance, "array") and len(instance) < mI:
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yield ValidationError(f"{instance!r} is too short")
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def maxItems(validator, mI, instance, schema):
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if validator.is_type(instance, "array") and len(instance) > mI:
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yield ValidationError(f"{instance!r} is too long")
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def uniqueItems(validator, uI, instance, schema):
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if (
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uI
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and validator.is_type(instance, "array")
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and not uniq(instance)
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):
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yield ValidationError(f"{instance!r} has non-unique elements")
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def pattern(validator, patrn, instance, schema):
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if (
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validator.is_type(instance, "string")
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and not re.search(patrn, instance)
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):
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yield ValidationError(f"{instance!r} does not match {patrn!r}")
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def format(validator, format, instance, schema):
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if validator.format_checker is not None:
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try:
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validator.format_checker.check(instance, format)
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except FormatError as error:
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yield ValidationError(error.message, cause=error.cause)
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def minLength(validator, mL, instance, schema):
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if validator.is_type(instance, "string") and len(instance) < mL:
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yield ValidationError(f"{instance!r} is too short")
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def maxLength(validator, mL, instance, schema):
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if validator.is_type(instance, "string") and len(instance) > mL:
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yield ValidationError(f"{instance!r} is too long")
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def dependentRequired(validator, dependentRequired, instance, schema):
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if not validator.is_type(instance, "object"):
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return
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for property, dependency in dependentRequired.items():
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if property not in instance:
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continue
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for each in dependency:
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if each not in instance:
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message = f"{each!r} is a dependency of {property!r}"
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yield ValidationError(message)
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def dependentSchemas(validator, dependentSchemas, instance, schema):
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if not validator.is_type(instance, "object"):
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return
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for property, dependency in dependentSchemas.items():
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if property not in instance:
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continue
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yield from validator.descend(
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instance, dependency, schema_path=property,
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)
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def enum(validator, enums, instance, schema):
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if instance == 0 or instance == 1:
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unbooled = unbool(instance)
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if all(unbooled != unbool(each) for each in enums):
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yield ValidationError(f"{instance!r} is not one of {enums!r}")
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elif instance not in enums:
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yield ValidationError(f"{instance!r} is not one of {enums!r}")
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def ref(validator, ref, instance, schema):
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resolve = getattr(validator.resolver, "resolve", None)
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if resolve is None:
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with validator.resolver.resolving(ref) as resolved:
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yield from validator.descend(instance, resolved)
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else:
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scope, resolved = validator.resolver.resolve(ref)
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validator.resolver.push_scope(scope)
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try:
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yield from validator.descend(instance, resolved)
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finally:
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validator.resolver.pop_scope()
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def dynamicRef(validator, dynamicRef, instance, schema):
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_, fragment = urldefrag(dynamicRef)
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for url in validator.resolver._scopes_stack:
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lookup_url = urljoin(url, dynamicRef)
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with validator.resolver.resolving(lookup_url) as subschema:
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if ("$dynamicAnchor" in subschema
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and fragment == subschema["$dynamicAnchor"]):
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yield from validator.descend(instance, subschema)
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break
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else:
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with validator.resolver.resolving(dynamicRef) as subschema:
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yield from validator.descend(instance, subschema)
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def type(validator, types, instance, schema):
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types = ensure_list(types)
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if not any(validator.is_type(instance, type) for type in types):
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reprs = ", ".join(repr(type) for type in types)
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yield ValidationError(f"{instance!r} is not of type {reprs}")
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def properties(validator, properties, instance, schema):
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if not validator.is_type(instance, "object"):
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return
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for property, subschema in properties.items():
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if property in instance:
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yield from validator.descend(
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instance[property],
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subschema,
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path=property,
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schema_path=property,
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)
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def required(validator, required, instance, schema):
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if not validator.is_type(instance, "object"):
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return
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for property in required:
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if property not in instance:
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yield ValidationError(f"{property!r} is a required property")
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def minProperties(validator, mP, instance, schema):
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if validator.is_type(instance, "object") and len(instance) < mP:
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yield ValidationError(f"{instance!r} does not have enough properties")
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def maxProperties(validator, mP, instance, schema):
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if not validator.is_type(instance, "object"):
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return
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if validator.is_type(instance, "object") and len(instance) > mP:
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yield ValidationError(f"{instance!r} has too many properties")
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def allOf(validator, allOf, instance, schema):
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for index, subschema in enumerate(allOf):
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yield from validator.descend(instance, subschema, schema_path=index)
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def anyOf(validator, anyOf, instance, schema):
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all_errors = []
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for index, subschema in enumerate(anyOf):
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errs = list(validator.descend(instance, subschema, schema_path=index))
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if not errs:
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break
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all_errors.extend(errs)
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else:
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yield ValidationError(
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f"{instance!r} is not valid under any of the given schemas",
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context=all_errors,
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)
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def oneOf(validator, oneOf, instance, schema):
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subschemas = enumerate(oneOf)
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all_errors = []
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for index, subschema in subschemas:
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errs = list(validator.descend(instance, subschema, schema_path=index))
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if not errs:
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first_valid = subschema
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break
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all_errors.extend(errs)
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else:
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yield ValidationError(
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f"{instance!r} is not valid under any of the given schemas",
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context=all_errors,
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)
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more_valid = [
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each for _, each in subschemas
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if validator.evolve(schema=each).is_valid(instance)
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]
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if more_valid:
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more_valid.append(first_valid)
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reprs = ", ".join(repr(schema) for schema in more_valid)
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yield ValidationError(f"{instance!r} is valid under each of {reprs}")
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def not_(validator, not_schema, instance, schema):
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if validator.evolve(schema=not_schema).is_valid(instance):
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message = f"{instance!r} should not be valid under {not_schema!r}"
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yield ValidationError(message)
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def if_(validator, if_schema, instance, schema):
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if validator.evolve(schema=if_schema).is_valid(instance):
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if "then" in schema:
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then = schema["then"]
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yield from validator.descend(instance, then, schema_path="then")
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elif "else" in schema:
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else_ = schema["else"]
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yield from validator.descend(instance, else_, schema_path="else")
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def unevaluatedItems(validator, unevaluatedItems, instance, schema):
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if not validator.is_type(instance, "array"):
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return
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evaluated_item_indexes = find_evaluated_item_indexes_by_schema(
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validator, instance, schema,
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)
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unevaluated_items = [
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item for index, item in enumerate(instance)
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if index not in evaluated_item_indexes
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]
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if unevaluated_items:
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error = "Unevaluated items are not allowed (%s %s unexpected)"
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yield ValidationError(error % extras_msg(unevaluated_items))
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def unevaluatedProperties(validator, unevaluatedProperties, instance, schema):
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if not validator.is_type(instance, "object"):
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return
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evaluated_keys = find_evaluated_property_keys_by_schema(
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validator, instance, schema,
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)
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unevaluated_keys = []
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for property in instance:
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if property not in evaluated_keys:
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for _ in validator.descend(
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instance[property],
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unevaluatedProperties,
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path=property,
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schema_path=property,
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):
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# FIXME: Include context for each unevaluated property
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# indicating why it's invalid under the subschema.
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unevaluated_keys.append(property)
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if unevaluated_keys:
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if unevaluatedProperties is False:
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error = "Unevaluated properties are not allowed (%s %s unexpected)"
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yield ValidationError(error % extras_msg(unevaluated_keys))
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else:
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error = (
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"Unevaluated properties are not valid under "
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"the given schema (%s %s unevaluated and invalid)"
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)
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yield ValidationError(error % extras_msg(unevaluated_keys))
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def prefixItems(validator, prefixItems, instance, schema):
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if not validator.is_type(instance, "array"):
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return
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for (index, item), subschema in zip(enumerate(instance), prefixItems):
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yield from validator.descend(
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instance=item,
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schema=subschema,
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schema_path=index,
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path=index,
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)
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