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148 lines
5.3 KiB
148 lines
5.3 KiB
"""Module containing the implementation of the IRIReference class."""
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# -*- coding: utf-8 -*-
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# Copyright (c) 2014 Rackspace
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# Copyright (c) 2015 Ian Stapleton Cordasco
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from collections import namedtuple
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from . import compat
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from . import exceptions
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from . import misc
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from . import normalizers
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from . import uri
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try:
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import idna
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except ImportError: # pragma: no cover
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idna = None
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class IRIReference(namedtuple('IRIReference', misc.URI_COMPONENTS),
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uri.URIMixin):
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"""Immutable object representing a parsed IRI Reference.
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Can be encoded into an URIReference object via the procedure
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specified in RFC 3987 Section 3.1
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.. note::
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The IRI submodule is a new interface and may possibly change in
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the future. Check for changes to the interface when upgrading.
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"""
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slots = ()
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def __new__(cls, scheme, authority, path, query, fragment,
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encoding='utf-8'):
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"""Create a new IRIReference."""
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ref = super(IRIReference, cls).__new__(
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cls,
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scheme or None,
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authority or None,
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path or None,
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query,
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fragment)
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ref.encoding = encoding
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return ref
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def __eq__(self, other):
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"""Compare this reference to another."""
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other_ref = other
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if isinstance(other, tuple):
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other_ref = self.__class__(*other)
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elif not isinstance(other, IRIReference):
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try:
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other_ref = self.__class__.from_string(other)
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except TypeError:
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raise TypeError(
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'Unable to compare {0}() to {1}()'.format(
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type(self).__name__, type(other).__name__))
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# See http://tools.ietf.org/html/rfc3986#section-6.2
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return tuple(self) == tuple(other_ref)
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def _match_subauthority(self):
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return misc.ISUBAUTHORITY_MATCHER.match(self.authority)
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@classmethod
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def from_string(cls, iri_string, encoding='utf-8'):
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"""Parse a IRI reference from the given unicode IRI string.
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:param str iri_string: Unicode IRI to be parsed into a reference.
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:param str encoding: The encoding of the string provided
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:returns: :class:`IRIReference` or subclass thereof
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"""
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iri_string = compat.to_str(iri_string, encoding)
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split_iri = misc.IRI_MATCHER.match(iri_string).groupdict()
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return cls(
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split_iri['scheme'], split_iri['authority'],
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normalizers.encode_component(split_iri['path'], encoding),
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normalizers.encode_component(split_iri['query'], encoding),
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normalizers.encode_component(split_iri['fragment'], encoding),
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encoding,
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)
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def encode(self, idna_encoder=None): # noqa: C901
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"""Encode an IRIReference into a URIReference instance.
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If the ``idna`` module is installed or the ``rfc3986[idna]``
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extra is used then unicode characters in the IRI host
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component will be encoded with IDNA2008.
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:param idna_encoder:
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Function that encodes each part of the host component
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If not given will raise an exception if the IRI
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contains a host component.
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:rtype: uri.URIReference
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:returns: A URI reference
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"""
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authority = self.authority
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if authority:
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if idna_encoder is None:
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if idna is None: # pragma: no cover
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raise exceptions.MissingDependencyError(
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"Could not import the 'idna' module "
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"and the IRI hostname requires encoding"
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)
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def idna_encoder(name):
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if any(ord(c) > 128 for c in name):
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try:
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return idna.encode(name.lower(),
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strict=True,
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std3_rules=True)
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except idna.IDNAError:
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raise exceptions.InvalidAuthority(self.authority)
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return name
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authority = ""
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if self.host:
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authority = ".".join([compat.to_str(idna_encoder(part))
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for part in self.host.split(".")])
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if self.userinfo is not None:
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authority = (normalizers.encode_component(
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self.userinfo, self.encoding) + '@' + authority)
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if self.port is not None:
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authority += ":" + str(self.port)
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return uri.URIReference(self.scheme,
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authority,
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path=self.path,
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query=self.query,
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fragment=self.fragment,
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encoding=self.encoding)
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