AnonymousFox

//opt/alt/python27/lib/python2.7/site-packages/jsonschema/_format.py

import datetime
import re
import socket

from jsonschema.compat import str_types
from jsonschema.exceptions import FormatError

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.

:class:`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 :meth:`FormatChecker.checks` or
    :meth:`FormatChecker.cls_checks` decorators.

Arguments:

formats (iterable):

The known formats to validate. This argument can be used to
            limit which formats will be used during validation.

"""

checkers = {}

def __init__(self, formats=None):
        if formats is None:
            self.checkers = self.checkers.copy()
        else:
            self.checkers = dict((k, self.checkers[k]) for k in formats)

def checks(self, format, raises=()):
        """
        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
                :attr:`ValidationError.cause` attribute of the resulting
                validation error.

"""

def _checks(func):
            self.checkers[format] = (func, raises)
            return func
        return _checks

cls_checks = classmethod(checks)

def check(self, instance, format):
        """
        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:

:exc:`FormatError` if 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(
                "%r is not a %r" % (instance, format), cause=cause,
            )

def conforms(self, instance, format):
        """
        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

_draft_checkers = {"draft3": [], "draft4": []}

def _checks_drafts(both=None, draft3=None, draft4=None, raises=()):
    draft3 = draft3 or both
    draft4 = draft4 or both

def wrap(func):
        if draft3:
            _draft_checkers["draft3"].append(draft3)
            func = FormatChecker.cls_checks(draft3, raises)(func)
        if draft4:
            _draft_checkers["draft4"].append(draft4)
            func = FormatChecker.cls_checks(draft4, raises)(func)
        return func
    return wrap

@_checks_drafts("email")
def is_email(instance):
    if not isinstance(instance, str_types):
        return True
    return "@" in instance

_ipv4_re = re.compile(r"^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$")

@_checks_drafts(draft3="ip-address", draft4="ipv4")
def is_ipv4(instance):
    if not isinstance(instance, str_types):
        return True
    if not _ipv4_re.match(instance):
        return False
    return all(0 <= int(component) <= 255 for component in instance.split("."))

if hasattr(socket, "inet_pton"):
    @_checks_drafts("ipv6", raises=socket.error)
    def is_ipv6(instance):
        if not isinstance(instance, str_types):
            return True
        return socket.inet_pton(socket.AF_INET6, instance)

_host_name_re = re.compile(r"^[A-Za-z0-9][A-Za-z0-9\.\-]{1,255}$")

@_checks_drafts(draft3="host-name", draft4="hostname")
def is_host_name(instance):
    if not isinstance(instance, str_types):
        return True
    if not _host_name_re.match(instance):
        return False
    components = instance.split(".")
    for component in components:
        if len(component) > 63:
            return False
    return True

try:
    import rfc3987
except ImportError:
    pass
else:
    @_checks_drafts("uri", raises=ValueError)
    def is_uri(instance):
        if not isinstance(instance, str_types):
            return True
        return rfc3987.parse(instance, rule="URI")

try:
    import strict_rfc3339
except ImportError:
    try:
        import isodate
    except ImportError:
        pass
    else:
        @_checks_drafts("date-time", raises=(ValueError, isodate.ISO8601Error))
        def is_datetime(instance):
            if not isinstance(instance, str_types):
                return True
            return isodate.parse_datetime(instance)
else:
    @_checks_drafts("date-time")
    def is_datetime(instance):
        if not isinstance(instance, str_types):
            return True
        return strict_rfc3339.validate_rfc3339(instance)

@_checks_drafts("regex", raises=re.error)
def is_regex(instance):
    if not isinstance(instance, str_types):
        return True
    return re.compile(instance)

@_checks_drafts(draft3="date", raises=ValueError)
def is_date(instance):
    if not isinstance(instance, str_types):
        return True
    return datetime.datetime.strptime(instance, "%Y-%m-%d")

@_checks_drafts(draft3="time", raises=ValueError)
def is_time(instance):
    if not isinstance(instance, str_types):
        return True
    return datetime.datetime.strptime(instance, "%H:%M:%S")

try:
    import webcolors
except ImportError:
    pass
else:
    def is_css_color_code(instance):
        return webcolors.normalize_hex(instance)

@_checks_drafts(draft3="color", raises=(ValueError, TypeError))
    def is_css21_color(instance):
        if (
            not isinstance(instance, str_types) or
            instance.lower() in webcolors.css21_names_to_hex
        ):
            return True
        return is_css_color_code(instance)

def is_css3_color(instance):
        if instance.lower() in webcolors.css3_names_to_hex:
            return True
        return is_css_color_code(instance)

draft3_format_checker = FormatChecker(_draft_checkers["draft3"])
draft4_format_checker = FormatChecker(_draft_checkers["draft4"])