Source code for PyFunceble.checker.syntax.domain_base

The tool to check the availability or syntax of domain, IP or URL.


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Provides the base of all domain syntax checker.

    Nissar Chababy, @funilrys, contactTATAfunilrysTODTODcom

Special thanks:


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Project documentation:

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    Copyright 2017, 2018, 2019, 2020, 2022 Nissar Chababy

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.

import functools
from typing import Optional, Tuple

from PyFunceble.checker.base import CheckerBase
from PyFunceble.dataset.iana import IanaDataset
from PyFunceble.dataset.public_suffix import PublicSuffixDataset

[docs]class DomainSyntaxCheckerBase(CheckerBase): """ Provides an interface to check the syntax of a second domain. :param str subject: Optional, The subject to work with. """ # pylint: disable=line-too-long SPECIAL_USE_DOMAIN_NAMES_EXTENSIONS = ["onion"] """ Specifies the extension which are specified as "Special-Use Domain Names" and supported by our project. :type: list .. seealso:: * `RFC6761`_ * `IANA Special-Use Domain Names`_ assignments. * `RFC7686`_ .. _RFC6761: .. _RFC7686: .. _IANA Special-Use Domain Names: """ last_point_index: Optional[int] = None """ Saves the index of the last point. """ iana_dataset: Optional[IanaDataset] = None public_suffix_dataset: Optional[PublicSuffixDataset] = None def __init__(self, subject: Optional[str] = None) -> None: self.iana_dataset = IanaDataset() self.public_suffix_dataset = PublicSuffixDataset() super().__init__(subject)
[docs] def reset_last_point_index(func): # pylint: disable=no-self-argument """ Resets the last point index before executing the decorated method. """ @functools.wraps(func) def wrapper(self, *args, **kwargs): self.last_point_index = None return func(self, *args, **kwargs) # pylint: disable=not-callable return wrapper
[docs] def find_last_point_index(func): # pylint: disable=no-self-argument """ Try to find the index of the last point after the execution of the decorated method. """ @functools.wraps(func) def wrapper(self, *args, **kwargs): result = func(self, *args, **kwargs) # pylint: disable=not-callable self.last_point_index = self.get_last_point_index(self.idna_subject) return result return wrapper
@CheckerBase.subject.setter @reset_last_point_index @find_last_point_index def subject(self, value: str): """ Sets the subject to work with. :param value: The subject to set. :raise TypeError: When the given :code:`value` is not a :py:class:`str`. :raise ValueError: When the given :code:`value` is empty. """ # pylint: disable=no-member super(DomainSyntaxCheckerBase, self.__class__).subject.fset(self, value)
[docs] @staticmethod def get_last_point_index(subject: str) -> Optional[int]: """ Provides the index of the last point of the given subject. """ try: if subject.endswith("."): return subject[:-1].rfind(".") return subject.rindex(".") except ValueError: return None
[docs] def get_subject_without_suffix( self, subject: str, extension: str ) -> Optional[Tuple[Optional[int], Optional[str]]]: """ Provides the given subject without the suffix. :param subject: The subject to work with. :param extension: The extension previously extracted. """ if extension in self.public_suffix_dataset: for suffix in self.public_suffix_dataset.get_available_suffix(extension): try: return subject[: subject.rindex(f".{suffix}")], suffix except ValueError: continue return None, None
[docs] @CheckerBase.ensure_subject_is_given def get_extension(self) -> Optional[str]: """ Provides the extension to work with (if exists). """ if self.last_point_index is None: return None # Plus one is for the leading point. extension = self.idna_subject[self.last_point_index + 1 :] if extension.endswith("."): extension = extension[:-1] return extension
[docs] def is_valid(self) -> bool: """ Validate the given subject. """ raise NotImplementedError()