"""
The tool to check the availability or syntax of domains, IPv4, IPv6 or URL.
::
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Provides the syntax checker interface.
Author:
Nissar Chababy, @funilrys, contactTATAfunilrysTODTODcom
Special thanks:
https://pyfunceble.github.io/special-thanks.html
Contributors:
https://pyfunceble.github.io/contributors.html
Project link:
https://github.com/funilrys/PyFunceble
Project documentation:
https://pyfunceble.readthedocs.io///en/master/
Project homepage:
https://pyfunceble.github.io/
License:
::
MIT License
Copyright (c) 2017, 2018, 2019, 2020 Nissar Chababy
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
"""
from ipaddress import (
AddressValueError,
IPv4Address,
IPv6Address,
ip_address,
ip_interface,
ip_network,
)
from domain2idna import get as domain2idna
import PyFunceble
[docs]class Check:
"""
Provides our syntax checkers.
:param str subject: The subject (URL, IP or domain) to check.
"""
# 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: https://tools.ietf.org/html/rfc6761
.. _RFC7686: https://tools.ietf.org/html/rfc6761
.. _IANA Special-Use Domain Names: https://www.iana.org/assignments/special-use-domain-names/special-use-domain-names.txt
"""
def __init__(self, subject):
self.subject = subject
if (
self.subject.startswith("*.")
and PyFunceble.CONFIGURATION.wildcard
and PyFunceble.CONFIGURATION.syntax
):
self.subject = self.subject[2:]
[docs] def is_url(
self, return_base=False, return_formatted=False
): # pylint: disable=too-many-branches
"""
Checks if the given subject is a valid URL.
:param bool return_base:
Allow us the return of the url base (if URL formatted correctly).
:param bool return_formatted:
Allow us to get the formatted URL as response.
:return: The validity or the base if asked.
:rtype: bool, str
"""
# We initiate a variable which will save the initial base in case
# we have to convert the base to IDNA.
initial_base = None
if self.subject.startswith("http"):
# The element to test starts with http.
try:
# We initiate a regex which will match the domain or the url base.
regex = r"(^(http:\/\/|https:\/\/)(.+?(?=\/)|.+?$))"
# We extract the url base with the help of the initiated regex.
initial_base = base = PyFunceble.helpers.Regex(regex).match(
self.subject, return_match=True, rematch=True
)[2]
if PyFunceble.CONFIGURATION.idna_conversion:
# We have to convert the domain to IDNA.
# We convert the initial base to IDNA.
base = domain2idna(base)
if ":" in base:
# The port is explicitly given.
# We remove it from the base.
splited_base = base.split(":")
else:
splited_base = None
if splited_base:
# We check if the url base is a valid domain.
domain_status = Check(splited_base[0]).is_domain()
# We check if the url base is a valid IP.
ip_status = Check(splited_base[0]).is_ip()
else:
# We check if the url base is a valid domain.
domain_status = Check(base).is_domain()
# We check if the url base is a valid IP.
ip_status = Check(base).is_ip()
if domain_status or ip_status:
# * The url base is a valid domain.
# and
# * The url base is a valid IP.
if splited_base:
initial_base = base = splited_base[0]
if PyFunceble.CONFIGURATION.idna_conversion and return_formatted:
# * We have to convert to IDNA.
# and
# * We have to return the converted full URL.
# We return the converted full URL.
return PyFunceble.helpers.Regex(
initial_base, escape=True
).replace_match(self.subject, base, occurences=1)
if return_formatted:
# * We do not have to convert to IDNA.
# but
# * We have to return the full URL.
# We return the initially given URL.
return self.subject
if return_base:
# We have to return the base of the URL.
# We return the base of the URL.
return base
# We return True.
return True
except TypeError:
pass
if return_formatted:
# We have to return an URL.
# We return the initily given URL.
return self.subject
# We return False.
return False
[docs] def is_domain(
self, subdomain_check=False
): # pylint:disable=too-many-return-statements, too-many-branches
"""
Checks if the given subject is a valid domain.
:param bool subdomain_check:
Activates the subdomain checking.
.. warning::
Do not manually use.
Please report to :py:func:`~PyFunceble.check.Check.is_subdomain`.
:return: The validity.
:rtype: bool
"""
# We initate our regex which will match for valid domains.
regex_valid_domains = r"^(?=.{0,253}$)(([a-z0-9][a-z0-9-]{0,61}[a-z0-9]|[a-z0-9])\.)+((?=.*[^0-9])([a-z0-9][a-z0-9-]{0,61}[a-z0-9](?:\.)?|[a-z0-9](?:\.)?))$" # pylint: disable=line-too-long
# We initiate our regex which will match for valid subdomains.
regex_valid_subdomains = r"^(?=.{0,253}$)(([a-z0-9_][a-z0-9-_]{0,61}[a-z0-9_-]|[a-z0-9])\.)+((?=.*[^0-9])([a-z0-9][a-z0-9-]{0,61}[a-z0-9]|[a-z0-9]))$" # pylint: disable=line-too-long
try:
# We get the position of the last point.
last_point_index = self.subject.rindex(".")
# And with the help of the position of the last point, we get the domain extension.
extension = self.subject[last_point_index + 1 :]
if not extension and self.subject.endswith("."):
try:
extension = [x for x in self.subject.split(".") if x][-1]
except IndexError:
pass
if not extension or (
extension not in PyFunceble.IANALOOKUP
and extension not in self.SPECIAL_USE_DOMAIN_NAMES_EXTENSIONS
):
# * The extension is not found.
# or
# * The extension is not into the IANA database.
# or
# * The extension is not into our mapping of
# the "Special-Use Domain Names" specification.
# We return false.
return False
if (
PyFunceble.helpers.Regex(regex_valid_domains).match(
self.subject, return_match=False
)
and not subdomain_check
):
# * The element pass the domain validation.
# and
# * We are not checking if it is a subdomain.
# We return True. The domain is valid.
return True
# The element did not pass the domain validation. That means that
# it has invalid character or the position of - or _ are not right.
if extension in PyFunceble.PSLOOOKUP:
# The extension is into the psl database.
for suffix in PyFunceble.PSLOOOKUP[extension]:
# We loop through the element of the extension into the psl database.
try:
# We try to get the position of the currently read suffix
# in the element ot test.
suffix_index = self.subject.rindex("." + suffix)
# We get the element to check.
# The idea here is to delete the suffix, then retest with our
# subdomains regex.
to_check = self.subject[:suffix_index]
if "." not in to_check and subdomain_check:
# * There is no point into the new element to check.
# and
# * We are checking if it is a subdomain.
# We return False, it is not a subdomain.
return False
if "." in to_check and subdomain_check:
# * There is a point into the new element to check.
# and
# * We are checking if it is a subdomain.
# We return True, it is a subdomain.
return True
# We are not checking if it is a subdomain.
if "." in to_check:
# There is a point into the new element to check.
# We check if it passes our subdomain regex.
# * True: It's a valid domain.
# * False: It's an invalid domain.
return PyFunceble.helpers.Regex(
regex_valid_subdomains
).match(to_check, return_match=False)
except ValueError:
# In case of a value error because the position is not found,
# we continue to the next element.
pass
# * The extension is not into the psl database.
# or
# * there was no point into the suffix checking.
# We get the element before the last point.
to_check = self.subject[:last_point_index]
if "." in to_check and subdomain_check:
# * There is a point in to_check.
# and
# * We are checking if it is a subdomain.
# We return True, it is a subdomain.
return True
# We are not checking if it is a subdomain.
if "." in to_check:
# There is a point in to_check.
# We check if it passes our subdomain regex.
# * True: It's a valid domain.
# * False: It's an invalid domain.
return PyFunceble.helpers.Regex(regex_valid_subdomains).match(
to_check, return_match=False
)
except (ValueError, AttributeError):
# In case of a value or attribute error we ignore them.
pass
# And we return False, the domain is not valid.
return False
[docs] def is_subdomain(self):
"""
Checks if the given subject is a valid subdomain.
:return: The validity.
:rtype: bool
"""
# We return the status of the check.
return self.is_domain(subdomain_check=True)
[docs] def is_ip(self):
"""
Checks if the given subject is a valid IPv4 or IPv6.
:return: The validity.
:rtype: bool
"""
return self.is_ipv4() or self.is_ipv6()
[docs] def is_ipv4(self):
"""
Checks if the given subject is a valid IPv4.
:return: The validity.
:rtype: bool
"""
try:
try:
return ip_address(self.subject).version == 4
except ValueError:
try:
return ip_interface(self.subject).version == 4
except ValueError:
return ip_network(self.subject, strict=False).version == 4
except ValueError:
return False
[docs] def is_ipv6(self):
"""
Checks if the given subject is a valid IPv6.
:return: The validity.
:rtype: bool
"""
try:
try:
return ip_address(self.subject).version == 6
except ValueError:
try:
return ip_interface(self.subject).version == 6
except ValueError:
return ip_network(self.subject, strict=False).version == 6
except ValueError:
return False
[docs] def is_ip_range(self): # pragma: no cover
"""
Checks if the given subject is a valid IPv4 or IPv6 range.
:return: The validity.
:rtype: bool
"""
return self.is_ipv4_range() or self.is_ipv6_range()
[docs] def is_ipv4_range(self):
"""
Checks if the given subject is a valid IPv4 range.
:return: The validity.
:rtype: bool
"""
if self.is_ipv4():
if "/" in self.subject:
block = int(self.subject.split("/")[-1])
return 0 <= block <= 32
return False
[docs] def is_ipv6_range(self):
"""
Checks if the given subject is a valid IPv6 range.
:return: The validity.
:rtype: bool
"""
if self.is_ipv6():
if "/" in self.subject:
block = int(self.subject.split("/")[-1])
return 0 <= block <= 128
return False
[docs] def is_reserved_ip(self): # pragma: no cover
"""
Checks if the given subject is a reserved IPv4 or IPv6.
:return: The validity.
:rtype: bool
"""
return self.is_reserved_ipv4() or self.is_reserved_ipv6()
# pylint: disable=line-too-long
[docs] def is_reserved_ipv4(self):
"""
Checks if the given subject is a reserved IPv4.
.. note::
This method has been written on basis of the following links:
* https://en.wikipedia.org/wiki/Reserved_IP_addresses
* https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml
:return: The validity.
:rtype: bool
"""
if self.is_ipv4():
# We are working with an IPv4.
# We list the regex which matched everything.
reserved = [
# Match 0.0.0.0–0.255.255.255
r"(0\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[0-9]{1,}\/[0-9]{1,}))", # pylint: disable=line-too-long
# Match 10.0.0.0–10.255.255.255
r"(10\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[0-9]{1,}\/[0-9]{1,}))", # pylint: disable=line-too-long
# Match 100.64.0.0–100.127.255.255
r"(100\.(0?6[4-9]|0?[7-9][0-9]|1[0-1][0-9]|12[0-7])\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[0-9]{1,}\/[0-9]{1,}))", # pylint: disable=line-too-long
# Match 127.0.0.0–127.255.255.255
r"(127\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[0-9]{1,}\/[0-9]{1,}))", # pylint: disable=line-too-long
# Match 169.254.0.0–169.254.255.255
r"(169\.254\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[0-9]{1,}\/[0-9]{1,}))", # pylint: disable=line-too-long
# Match 172.16.0.0–172.31.255.255
r"(172\.(0?1[6-9]|0?2[0-9]|0?3[0-1])\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[0-9]{1,}\/[0-9]{1,}))", # pylint: disable=line-too-long
# Match 192.0.0.0–192.0.0.255
r"(192\.0\.0\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[0-9]{1,}\/[0-9]{1,}))", # pylint: disable=line-too-long
# Match 192.0.2.0–192.0.2.255
r"(192\.0\.2\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[0-9]{1,}\/[0-9]{1,}))", # pylint: disable=line-too-long
# Match 192.31.196.0–192.31.196.255
r"(192\.31\.196\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[0-9]{1,}\/[0-9]{1,}))", # pylint: disable=line-too-long
# Match 192.52.193.0–192.52.193.255
r"(192\.52\.193\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[0-9]{1,}\/[0-9]{1,}))", # pylint: disable=line-too-long
# Match 192.88.99.0–192.88.99.255
r"(192\.88\.99\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[0-9]{1,}\/[0-9]{1,}))", # pylint: disable=line-too-long
# Match 192.168.0.0–192.168.255.255
r"(192\.168\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[0-9]{1,}\/[0-9]{1,}))", # pylint: disable=line-too-long
# Match 192.175.48.0-192.175.48.255
r"(192\.175\.48\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))",
# Match 198.18.0.0–198.19.255.255
r"(198\.(0?1[8-9])\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[0-9]{1,}\/[0-9]{1,}))", # pylint: disable=line-too-long
# Match 198.51.100.0–198.51.100.255
r"(198\.51\.100\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[0-9]{1,}\/[0-9]{1,}))", # pylint: disable=line-too-long
# Match 203.0.113.0–203.0.113.255
r"(203\.0\.113\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[0-9]{1,}\/[0-9]{1,}))", # pylint: disable=line-too-long
# Match 224.0.0.0–239.255.255.255
r"((22[4-9]|23[0-9])\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[0-9]{1,}\/[0-9]{1,}))", # pylint: disable=line-too-long
# Match 240.0.0.0–255.255.255.254
r"((24[0-9]|25[0-5])\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[0-9]{1,}\/[0-9]{1,}))", # pylint: disable=line-too-long
# Match 255.255.255.255
r"(255\.255\.255\.255)", # pylint: disable=line-too-long
]
# We get a single regex out of the list of regex.
reserved_regex = "({0})".format("|".join(reserved))
try:
address = IPv4Address(self.subject)
# We check if it passes our regex.
# * True: It's reserved.
# * False: It's not reserved.
return (
address.is_multicast
or address.is_private
or address.is_unspecified
or address.is_reserved
or address.is_loopback
or address.is_link_local
or not address.is_global
or PyFunceble.helpers.Regex(reserved_regex).match(
self.subject, return_match=False
)
)
except AddressValueError: # pragma: no cover
return PyFunceble.helpers.Regex(reserved_regex).match(
self.subject, return_match=False
)
# We return False, we are not working with an IPv4
return False
[docs] def is_reserved_ipv6(self):
"""
Checks if the given subject is a reserved IPv6.
:return: The validity.
:rtype: bool
"""
if self.is_ipv6():
try:
address = IPv6Address(self.subject)
return (
address.is_multicast
or address.is_private
or address.is_unspecified
or address.is_reserved
or address.is_loopback
or address.is_link_local
or not address.is_global
)
except AddressValueError:
pass
return False