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import functools
import re
from urllib.parse import urlparse, unquote
from ._types import ProxyType
_ipv4_pattern = (r'^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}'
r'(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$')
_ipv6_pattern = (
r'^(?:(?:(?:[A-F0-9]{1,4}:){6}|(?=(?:[A-F0-9]{0,4}:){0,6}'
r'(?:[0-9]{1,3}\.){3}[0-9]{1,3}$)(([0-9A-F]{1,4}:){0,5}|:)'
r'((:[0-9A-F]{1,4}){1,5}:|:)|::(?:[A-F0-9]{1,4}:){5})'
r'(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])\.){3}'
r'(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])|(?:[A-F0-9]{1,4}:){7}'
r'[A-F0-9]{1,4}|(?=(?:[A-F0-9]{0,4}:){0,7}[A-F0-9]{0,4}$)'
r'(([0-9A-F]{1,4}:){1,7}|:)((:[0-9A-F]{1,4}){1,7}|:)|(?:[A-F0-9]{1,4}:){7}'
r':|:(:[A-F0-9]{1,4}){7})$')
_ipv4_regex = re.compile(_ipv4_pattern)
_ipv6_regex = re.compile(_ipv6_pattern, flags=re.IGNORECASE)
_ipv4_regexb = re.compile(_ipv4_pattern.encode('ascii'))
_ipv6_regexb = re.compile(_ipv6_pattern.encode('ascii'), flags=re.IGNORECASE)
def _is_ip_address(regex, regexb, host):
# if host is None:
# return False
if isinstance(host, str):
return bool(regex.match(host))
elif isinstance(host, (bytes, bytearray, memoryview)):
return bool(regexb.match(host))
else:
raise TypeError('{} [{}] is not a str or bytes' # pragma: no cover
.format(host, type(host)))
is_ipv4_address = functools.partial(_is_ip_address, _ipv4_regex, _ipv4_regexb)
is_ipv6_address = functools.partial(_is_ip_address, _ipv6_regex, _ipv6_regexb)
def is_ip_address(host):
return is_ipv4_address(host) or is_ipv6_address(host)
def parse_proxy_url(url):
parsed = urlparse(url)
scheme = parsed.scheme
if scheme == 'socks5':
proxy_type = ProxyType.SOCKS5
elif scheme == 'socks4':
proxy_type = ProxyType.SOCKS4
elif scheme == 'http':
proxy_type = ProxyType.HTTP
else:
raise ValueError('Invalid scheme component: %s'
% scheme) # pragma: no cover
host = parsed.hostname
if not host:
raise ValueError('Empty host component') # pragma: no cover
try:
port = parsed.port
except (ValueError, TypeError): # pragma: no cover
raise ValueError('Invalid port component')
try:
username, password = (unquote(parsed.username),
unquote(parsed.password))
except (AttributeError, TypeError):
username, password = '', ''
return proxy_type, host, port, username, password
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