Library import 16 (#2433)

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diff --git a/contrib/tools/python3/Lib/urllib/parse.py b/contrib/tools/python3/Lib/urllib/parse.py
new file mode 100644
index 0000000000..c129b0d797
--- /dev/null
+++ b/contrib/tools/python3/Lib/urllib/parse.py
@@ -0,0 +1,1236 @@
+"""Parse (absolute and relative) URLs.
+
+urlparse module is based upon the following RFC specifications.
+
+RFC 3986 (STD66): "Uniform Resource Identifiers" by T. Berners-Lee, R. Fielding
+and L.  Masinter, January 2005.
+
+RFC 2732 : "Format for Literal IPv6 Addresses in URL's by R.Hinden, B.Carpenter
+and L.Masinter, December 1999.
+
+RFC 2396:  "Uniform Resource Identifiers (URI)": Generic Syntax by T.
+Berners-Lee, R. Fielding, and L. Masinter, August 1998.
+
+RFC 2368: "The mailto URL scheme", by P.Hoffman , L Masinter, J. Zawinski, July 1998.
+
+RFC 1808: "Relative Uniform Resource Locators", by R. Fielding, UC Irvine, June
+1995.
+
+RFC 1738: "Uniform Resource Locators (URL)" by T. Berners-Lee, L. Masinter, M.
+McCahill, December 1994
+
+RFC 3986 is considered the current standard and any future changes to
+urlparse module should conform with it.  The urlparse module is
+currently not entirely compliant with this RFC due to defacto
+scenarios for parsing, and for backward compatibility purposes, some
+parsing quirks from older RFCs are retained. The testcases in
+test_urlparse.py provides a good indicator of parsing behavior.
+
+The WHATWG URL Parser spec should also be considered.  We are not compliant with
+it either due to existing user code API behavior expectations (Hyrum's Law).
+It serves as a useful guide when making changes.
+"""
+
+from collections import namedtuple
+import functools
+import math
+import re
+import types
+import warnings
+import ipaddress
+
+__all__ = ["urlparse", "urlunparse", "urljoin", "urldefrag",
+           "urlsplit", "urlunsplit", "urlencode", "parse_qs",
+           "parse_qsl", "quote", "quote_plus", "quote_from_bytes",
+           "unquote", "unquote_plus", "unquote_to_bytes",
+           "DefragResult", "ParseResult", "SplitResult",
+           "DefragResultBytes", "ParseResultBytes", "SplitResultBytes"]
+
+# A classification of schemes.
+# The empty string classifies URLs with no scheme specified,
+# being the default value returned by “urlsplit” and “urlparse”.
+
+uses_relative = ['', 'ftp', 'http', 'gopher', 'nntp', 'imap',
+                 'wais', 'file', 'https', 'shttp', 'mms',
+                 'prospero', 'rtsp', 'rtsps', 'rtspu', 'sftp',
+                 'svn', 'svn+ssh', 'ws', 'wss']
+
+uses_netloc = ['', 'ftp', 'http', 'gopher', 'nntp', 'telnet',
+               'imap', 'wais', 'file', 'mms', 'https', 'shttp',
+               'snews', 'prospero', 'rtsp', 'rtsps', 'rtspu', 'rsync',
+               'svn', 'svn+ssh', 'sftp', 'nfs', 'git', 'git+ssh',
+               'ws', 'wss', 'itms-services']
+
+uses_params = ['', 'ftp', 'hdl', 'prospero', 'http', 'imap',
+               'https', 'shttp', 'rtsp', 'rtsps', 'rtspu', 'sip',
+               'sips', 'mms', 'sftp', 'tel']
+
+# These are not actually used anymore, but should stay for backwards
+# compatibility.  (They are undocumented, but have a public-looking name.)
+
+non_hierarchical = ['gopher', 'hdl', 'mailto', 'news',
+                    'telnet', 'wais', 'imap', 'snews', 'sip', 'sips']
+
+uses_query = ['', 'http', 'wais', 'imap', 'https', 'shttp', 'mms',
+              'gopher', 'rtsp', 'rtsps', 'rtspu', 'sip', 'sips']
+
+uses_fragment = ['', 'ftp', 'hdl', 'http', 'gopher', 'news',
+                 'nntp', 'wais', 'https', 'shttp', 'snews',
+                 'file', 'prospero']
+
+# Characters valid in scheme names
+scheme_chars = ('abcdefghijklmnopqrstuvwxyz'
+                'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+                '0123456789'
+                '+-.')
+
+# Leading and trailing C0 control and space to be stripped per WHATWG spec.
+# == "".join([chr(i) for i in range(0, 0x20 + 1)])
+_WHATWG_C0_CONTROL_OR_SPACE = '\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f '
+
+# Unsafe bytes to be removed per WHATWG spec
+_UNSAFE_URL_BYTES_TO_REMOVE = ['\t', '\r', '\n']
+
+def clear_cache():
+    """Clear internal performance caches. Undocumented; some tests want it."""
+    urlsplit.cache_clear()
+    _byte_quoter_factory.cache_clear()
+
+# Helpers for bytes handling
+# For 3.2, we deliberately require applications that
+# handle improperly quoted URLs to do their own
+# decoding and encoding. If valid use cases are
+# presented, we may relax this by using latin-1
+# decoding internally for 3.3
+_implicit_encoding = 'ascii'
+_implicit_errors = 'strict'
+
+def _noop(obj):
+    return obj
+
+def _encode_result(obj, encoding=_implicit_encoding,
+                        errors=_implicit_errors):
+    return obj.encode(encoding, errors)
+
+def _decode_args(args, encoding=_implicit_encoding,
+                       errors=_implicit_errors):
+    return tuple(x.decode(encoding, errors) if x else '' for x in args)
+
+def _coerce_args(*args):
+    # Invokes decode if necessary to create str args
+    # and returns the coerced inputs along with
+    # an appropriate result coercion function
+    #   - noop for str inputs
+    #   - encoding function otherwise
+    str_input = isinstance(args[0], str)
+    for arg in args[1:]:
+        # We special-case the empty string to support the
+        # "scheme=''" default argument to some functions
+        if arg and isinstance(arg, str) != str_input:
+            raise TypeError("Cannot mix str and non-str arguments")
+    if str_input:
+        return args + (_noop,)
+    return _decode_args(args) + (_encode_result,)
+
+# Result objects are more helpful than simple tuples
+class _ResultMixinStr(object):
+    """Standard approach to encoding parsed results from str to bytes"""
+    __slots__ = ()
+
+    def encode(self, encoding='ascii', errors='strict'):
+        return self._encoded_counterpart(*(x.encode(encoding, errors) for x in self))
+
+
+class _ResultMixinBytes(object):
+    """Standard approach to decoding parsed results from bytes to str"""
+    __slots__ = ()
+
+    def decode(self, encoding='ascii', errors='strict'):
+        return self._decoded_counterpart(*(x.decode(encoding, errors) for x in self))
+
+
+class _NetlocResultMixinBase(object):
+    """Shared methods for the parsed result objects containing a netloc element"""
+    __slots__ = ()
+
+    @property
+    def username(self):
+        return self._userinfo[0]
+
+    @property
+    def password(self):
+        return self._userinfo[1]
+
+    @property
+    def hostname(self):
+        hostname = self._hostinfo[0]
+        if not hostname:
+            return None
+        # Scoped IPv6 address may have zone info, which must not be lowercased
+        # like http://[fe80::822a:a8ff:fe49:470c%tESt]:1234/keys
+        separator = '%' if isinstance(hostname, str) else b'%'
+        hostname, percent, zone = hostname.partition(separator)
+        return hostname.lower() + percent + zone
+
+    @property
+    def port(self):
+        port = self._hostinfo[1]
+        if port is not None:
+            if port.isdigit() and port.isascii():
+                port = int(port)
+            else:
+                raise ValueError(f"Port could not be cast to integer value as {port!r}")
+            if not (0 <= port <= 65535):
+                raise ValueError("Port out of range 0-65535")
+        return port
+
+    __class_getitem__ = classmethod(types.GenericAlias)
+
+
+class _NetlocResultMixinStr(_NetlocResultMixinBase, _ResultMixinStr):
+    __slots__ = ()
+
+    @property
+    def _userinfo(self):
+        netloc = self.netloc
+        userinfo, have_info, hostinfo = netloc.rpartition('@')
+        if have_info:
+            username, have_password, password = userinfo.partition(':')
+            if not have_password:
+                password = None
+        else:
+            username = password = None
+        return username, password
+
+    @property
+    def _hostinfo(self):
+        netloc = self.netloc
+        _, _, hostinfo = netloc.rpartition('@')
+        _, have_open_br, bracketed = hostinfo.partition('[')
+        if have_open_br:
+            hostname, _, port = bracketed.partition(']')
+            _, _, port = port.partition(':')
+        else:
+            hostname, _, port = hostinfo.partition(':')
+        if not port:
+            port = None
+        return hostname, port
+
+
+class _NetlocResultMixinBytes(_NetlocResultMixinBase, _ResultMixinBytes):
+    __slots__ = ()
+
+    @property
+    def _userinfo(self):
+        netloc = self.netloc
+        userinfo, have_info, hostinfo = netloc.rpartition(b'@')
+        if have_info:
+            username, have_password, password = userinfo.partition(b':')
+            if not have_password:
+                password = None
+        else:
+            username = password = None
+        return username, password
+
+    @property
+    def _hostinfo(self):
+        netloc = self.netloc
+        _, _, hostinfo = netloc.rpartition(b'@')
+        _, have_open_br, bracketed = hostinfo.partition(b'[')
+        if have_open_br:
+            hostname, _, port = bracketed.partition(b']')
+            _, _, port = port.partition(b':')
+        else:
+            hostname, _, port = hostinfo.partition(b':')
+        if not port:
+            port = None
+        return hostname, port
+
+
+_DefragResultBase = namedtuple('DefragResult', 'url fragment')
+_SplitResultBase = namedtuple(
+    'SplitResult', 'scheme netloc path query fragment')
+_ParseResultBase = namedtuple(
+    'ParseResult', 'scheme netloc path params query fragment')
+
+_DefragResultBase.__doc__ = """
+DefragResult(url, fragment)
+
+A 2-tuple that contains the url without fragment identifier and the fragment
+identifier as a separate argument.
+"""
+
+_DefragResultBase.url.__doc__ = """The URL with no fragment identifier."""
+
+_DefragResultBase.fragment.__doc__ = """
+Fragment identifier separated from URL, that allows indirect identification of a
+secondary resource by reference to a primary resource and additional identifying
+information.
+"""
+
+_SplitResultBase.__doc__ = """
+SplitResult(scheme, netloc, path, query, fragment)
+
+A 5-tuple that contains the different components of a URL. Similar to
+ParseResult, but does not split params.
+"""
+
+_SplitResultBase.scheme.__doc__ = """Specifies URL scheme for the request."""
+
+_SplitResultBase.netloc.__doc__ = """
+Network location where the request is made to.
+"""
+
+_SplitResultBase.path.__doc__ = """
+The hierarchical path, such as the path to a file to download.
+"""
+
+_SplitResultBase.query.__doc__ = """
+The query component, that contains non-hierarchical data, that along with data
+in path component, identifies a resource in the scope of URI's scheme and
+network location.
+"""
+
+_SplitResultBase.fragment.__doc__ = """
+Fragment identifier, that allows indirect identification of a secondary resource
+by reference to a primary resource and additional identifying information.
+"""
+
+_ParseResultBase.__doc__ = """
+ParseResult(scheme, netloc, path, params, query, fragment)
+
+A 6-tuple that contains components of a parsed URL.
+"""
+
+_ParseResultBase.scheme.__doc__ = _SplitResultBase.scheme.__doc__
+_ParseResultBase.netloc.__doc__ = _SplitResultBase.netloc.__doc__
+_ParseResultBase.path.__doc__ = _SplitResultBase.path.__doc__
+_ParseResultBase.params.__doc__ = """
+Parameters for last path element used to dereference the URI in order to provide
+access to perform some operation on the resource.
+"""
+
+_ParseResultBase.query.__doc__ = _SplitResultBase.query.__doc__
+_ParseResultBase.fragment.__doc__ = _SplitResultBase.fragment.__doc__
+
+
+# For backwards compatibility, alias _NetlocResultMixinStr
+# ResultBase is no longer part of the documented API, but it is
+# retained since deprecating it isn't worth the hassle
+ResultBase = _NetlocResultMixinStr
+
+# Structured result objects for string data
+class DefragResult(_DefragResultBase, _ResultMixinStr):
+    __slots__ = ()
+    def geturl(self):
+        if self.fragment:
+            return self.url + '#' + self.fragment
+        else:
+            return self.url
+
+class SplitResult(_SplitResultBase, _NetlocResultMixinStr):
+    __slots__ = ()
+    def geturl(self):
+        return urlunsplit(self)
+
+class ParseResult(_ParseResultBase, _NetlocResultMixinStr):
+    __slots__ = ()
+    def geturl(self):
+        return urlunparse(self)
+
+# Structured result objects for bytes data
+class DefragResultBytes(_DefragResultBase, _ResultMixinBytes):
+    __slots__ = ()
+    def geturl(self):
+        if self.fragment:
+            return self.url + b'#' + self.fragment
+        else:
+            return self.url
+
+class SplitResultBytes(_SplitResultBase, _NetlocResultMixinBytes):
+    __slots__ = ()
+    def geturl(self):
+        return urlunsplit(self)
+
+class ParseResultBytes(_ParseResultBase, _NetlocResultMixinBytes):
+    __slots__ = ()
+    def geturl(self):
+        return urlunparse(self)
+
+# Set up the encode/decode result pairs
+def _fix_result_transcoding():
+    _result_pairs = (
+        (DefragResult, DefragResultBytes),
+        (SplitResult, SplitResultBytes),
+        (ParseResult, ParseResultBytes),
+    )
+    for _decoded, _encoded in _result_pairs:
+        _decoded._encoded_counterpart = _encoded
+        _encoded._decoded_counterpart = _decoded
+
+_fix_result_transcoding()
+del _fix_result_transcoding
+
+def urlparse(url, scheme='', allow_fragments=True):
+    """Parse a URL into 6 components:
+    <scheme>://<netloc>/<path>;<params>?<query>#<fragment>
+
+    The result is a named 6-tuple with fields corresponding to the
+    above. It is either a ParseResult or ParseResultBytes object,
+    depending on the type of the url parameter.
+
+    The username, password, hostname, and port sub-components of netloc
+    can also be accessed as attributes of the returned object.
+
+    The scheme argument provides the default value of the scheme
+    component when no scheme is found in url.
+
+    If allow_fragments is False, no attempt is made to separate the
+    fragment component from the previous component, which can be either
+    path or query.
+
+    Note that % escapes are not expanded.
+    """
+    url, scheme, _coerce_result = _coerce_args(url, scheme)
+    splitresult = urlsplit(url, scheme, allow_fragments)
+    scheme, netloc, url, query, fragment = splitresult
+    if scheme in uses_params and ';' in url:
+        url, params = _splitparams(url)
+    else:
+        params = ''
+    result = ParseResult(scheme, netloc, url, params, query, fragment)
+    return _coerce_result(result)
+
+def _splitparams(url):
+    if '/'  in url:
+        i = url.find(';', url.rfind('/'))
+        if i < 0:
+            return url, ''
+    else:
+        i = url.find(';')
+    return url[:i], url[i+1:]
+
+def _splitnetloc(url, start=0):
+    delim = len(url)   # position of end of domain part of url, default is end
+    for c in '/?#':    # look for delimiters; the order is NOT important
+        wdelim = url.find(c, start)        # find first of this delim
+        if wdelim >= 0:                    # if found
+            delim = min(delim, wdelim)     # use earliest delim position
+    return url[start:delim], url[delim:]   # return (domain, rest)
+
+def _checknetloc(netloc):
+    if not netloc or netloc.isascii():
+        return
+    # looking for characters like \u2100 that expand to 'a/c'
+    # IDNA uses NFKC equivalence, so normalize for this check
+    import unicodedata
+    n = netloc.replace('@', '')   # ignore characters already included
+    n = n.replace(':', '')        # but not the surrounding text
+    n = n.replace('#', '')
+    n = n.replace('?', '')
+    netloc2 = unicodedata.normalize('NFKC', n)
+    if n == netloc2:
+        return
+    for c in '/?#@:':
+        if c in netloc2:
+            raise ValueError("netloc '" + netloc + "' contains invalid " +
+                             "characters under NFKC normalization")
+
+# Valid bracketed hosts are defined in
+# https://www.rfc-editor.org/rfc/rfc3986#page-49 and https://url.spec.whatwg.org/
+def _check_bracketed_host(hostname):
+    if hostname.startswith('v'):
+        if not re.match(r"\Av[a-fA-F0-9]+\..+\Z", hostname):
+            raise ValueError(f"IPvFuture address is invalid")
+    else:
+        ip = ipaddress.ip_address(hostname) # Throws Value Error if not IPv6 or IPv4
+        if isinstance(ip, ipaddress.IPv4Address):
+            raise ValueError(f"An IPv4 address cannot be in brackets")
+
+# typed=True avoids BytesWarnings being emitted during cache key
+# comparison since this API supports both bytes and str input.
+@functools.lru_cache(typed=True)
+def urlsplit(url, scheme='', allow_fragments=True):
+    """Parse a URL into 5 components:
+    <scheme>://<netloc>/<path>?<query>#<fragment>
+
+    The result is a named 5-tuple with fields corresponding to the
+    above. It is either a SplitResult or SplitResultBytes object,
+    depending on the type of the url parameter.
+
+    The username, password, hostname, and port sub-components of netloc
+    can also be accessed as attributes of the returned object.
+
+    The scheme argument provides the default value of the scheme
+    component when no scheme is found in url.
+
+    If allow_fragments is False, no attempt is made to separate the
+    fragment component from the previous component, which can be either
+    path or query.
+
+    Note that % escapes are not expanded.
+    """
+
+    url, scheme, _coerce_result = _coerce_args(url, scheme)
+    # Only lstrip url as some applications rely on preserving trailing space.
+    # (https://url.spec.whatwg.org/#concept-basic-url-parser would strip both)
+    url = url.lstrip(_WHATWG_C0_CONTROL_OR_SPACE)
+    scheme = scheme.strip(_WHATWG_C0_CONTROL_OR_SPACE)
+
+    for b in _UNSAFE_URL_BYTES_TO_REMOVE:
+        url = url.replace(b, "")
+        scheme = scheme.replace(b, "")
+
+    allow_fragments = bool(allow_fragments)
+    netloc = query = fragment = ''
+    i = url.find(':')
+    if i > 0 and url[0].isascii() and url[0].isalpha():
+        for c in url[:i]:
+            if c not in scheme_chars:
+                break
+        else:
+            scheme, url = url[:i].lower(), url[i+1:]
+    if url[:2] == '//':
+        netloc, url = _splitnetloc(url, 2)
+        if (('[' in netloc and ']' not in netloc) or
+                (']' in netloc and '[' not in netloc)):
+            raise ValueError("Invalid IPv6 URL")
+        if '[' in netloc and ']' in netloc:
+            bracketed_host = netloc.partition('[')[2].partition(']')[0]
+            _check_bracketed_host(bracketed_host)
+    if allow_fragments and '#' in url:
+        url, fragment = url.split('#', 1)
+    if '?' in url:
+        url, query = url.split('?', 1)
+    _checknetloc(netloc)
+    v = SplitResult(scheme, netloc, url, query, fragment)
+    return _coerce_result(v)
+
+def urlunparse(components):
+    """Put a parsed URL back together again.  This may result in a
+    slightly different, but equivalent URL, if the URL that was parsed
+    originally had redundant delimiters, e.g. a ? with an empty query
+    (the draft states that these are equivalent)."""
+    scheme, netloc, url, params, query, fragment, _coerce_result = (
+                                                  _coerce_args(*components))
+    if params:
+        url = "%s;%s" % (url, params)
+    return _coerce_result(urlunsplit((scheme, netloc, url, query, fragment)))
+
+def urlunsplit(components):
+    """Combine the elements of a tuple as returned by urlsplit() into a
+    complete URL as a string. The data argument can be any five-item iterable.
+    This may result in a slightly different, but equivalent URL, if the URL that
+    was parsed originally had unnecessary delimiters (for example, a ? with an
+    empty query; the RFC states that these are equivalent)."""
+    scheme, netloc, url, query, fragment, _coerce_result = (
+                                          _coerce_args(*components))
+    if netloc or (scheme and scheme in uses_netloc and url[:2] != '//'):
+        if url and url[:1] != '/': url = '/' + url
+        url = '//' + (netloc or '') + url
+    if scheme:
+        url = scheme + ':' + url
+    if query:
+        url = url + '?' + query
+    if fragment:
+        url = url + '#' + fragment
+    return _coerce_result(url)
+
+def urljoin(base, url, allow_fragments=True):
+    """Join a base URL and a possibly relative URL to form an absolute
+    interpretation of the latter."""
+    if not base:
+        return url
+    if not url:
+        return base
+
+    base, url, _coerce_result = _coerce_args(base, url)
+    bscheme, bnetloc, bpath, bparams, bquery, bfragment = \
+            urlparse(base, '', allow_fragments)
+    scheme, netloc, path, params, query, fragment = \
+            urlparse(url, bscheme, allow_fragments)
+
+    if scheme != bscheme or scheme not in uses_relative:
+        return _coerce_result(url)
+    if scheme in uses_netloc:
+        if netloc:
+            return _coerce_result(urlunparse((scheme, netloc, path,
+                                              params, query, fragment)))
+        netloc = bnetloc
+
+    if not path and not params:
+        path = bpath
+        params = bparams
+        if not query:
+            query = bquery
+        return _coerce_result(urlunparse((scheme, netloc, path,
+                                          params, query, fragment)))
+
+    base_parts = bpath.split('/')
+    if base_parts[-1] != '':
+        # the last item is not a directory, so will not be taken into account
+        # in resolving the relative path
+        del base_parts[-1]
+
+    # for rfc3986, ignore all base path should the first character be root.
+    if path[:1] == '/':
+        segments = path.split('/')
+    else:
+        segments = base_parts + path.split('/')
+        # filter out elements that would cause redundant slashes on re-joining
+        # the resolved_path
+        segments[1:-1] = filter(None, segments[1:-1])
+
+    resolved_path = []
+
+    for seg in segments:
+        if seg == '..':
+            try:
+                resolved_path.pop()
+            except IndexError:
+                # ignore any .. segments that would otherwise cause an IndexError
+                # when popped from resolved_path if resolving for rfc3986
+                pass
+        elif seg == '.':
+            continue
+        else:
+            resolved_path.append(seg)
+
+    if segments[-1] in ('.', '..'):
+        # do some post-processing here. if the last segment was a relative dir,
+        # then we need to append the trailing '/'
+        resolved_path.append('')
+
+    return _coerce_result(urlunparse((scheme, netloc, '/'.join(
+        resolved_path) or '/', params, query, fragment)))
+
+
+def urldefrag(url):
+    """Removes any existing fragment from URL.
+
+    Returns a tuple of the defragmented URL and the fragment.  If
+    the URL contained no fragments, the second element is the
+    empty string.
+    """
+    url, _coerce_result = _coerce_args(url)
+    if '#' in url:
+        s, n, p, a, q, frag = urlparse(url)
+        defrag = urlunparse((s, n, p, a, q, ''))
+    else:
+        frag = ''
+        defrag = url
+    return _coerce_result(DefragResult(defrag, frag))
+
+_hexdig = '0123456789ABCDEFabcdef'
+_hextobyte = None
+
+def unquote_to_bytes(string):
+    """unquote_to_bytes('abc%20def') -> b'abc def'."""
+    return bytes(_unquote_impl(string))
+
+def _unquote_impl(string: bytes | bytearray | str) -> bytes | bytearray:
+    # Note: strings are encoded as UTF-8. This is only an issue if it contains
+    # unescaped non-ASCII characters, which URIs should not.
+    if not string:
+        # Is it a string-like object?
+        string.split
+        return b''
+    if isinstance(string, str):
+        string = string.encode('utf-8')
+    bits = string.split(b'%')
+    if len(bits) == 1:
+        return string
+    res = bytearray(bits[0])
+    append = res.extend
+    # Delay the initialization of the table to not waste memory
+    # if the function is never called
+    global _hextobyte
+    if _hextobyte is None:
+        _hextobyte = {(a + b).encode(): bytes.fromhex(a + b)
+                      for a in _hexdig for b in _hexdig}
+    for item in bits[1:]:
+        try:
+            append(_hextobyte[item[:2]])
+            append(item[2:])
+        except KeyError:
+            append(b'%')
+            append(item)
+    return res
+
+_asciire = re.compile('([\x00-\x7f]+)')
+
+def _generate_unquoted_parts(string, encoding, errors):
+    previous_match_end = 0
+    for ascii_match in _asciire.finditer(string):
+        start, end = ascii_match.span()
+        yield string[previous_match_end:start]  # Non-ASCII
+        # The ascii_match[1] group == string[start:end].
+        yield _unquote_impl(ascii_match[1]).decode(encoding, errors)
+        previous_match_end = end
+    yield string[previous_match_end:]  # Non-ASCII tail
+
+def unquote(string, encoding='utf-8', errors='replace'):
+    """Replace %xx escapes by their single-character equivalent. The optional
+    encoding and errors parameters specify how to decode percent-encoded
+    sequences into Unicode characters, as accepted by the bytes.decode()
+    method.
+    By default, percent-encoded sequences are decoded with UTF-8, and invalid
+    sequences are replaced by a placeholder character.
+
+    unquote('abc%20def') -> 'abc def'.
+    """
+    if isinstance(string, bytes):
+        return _unquote_impl(string).decode(encoding, errors)
+    if '%' not in string:
+        # Is it a string-like object?
+        string.split
+        return string
+    if encoding is None:
+        encoding = 'utf-8'
+    if errors is None:
+        errors = 'replace'
+    return ''.join(_generate_unquoted_parts(string, encoding, errors))
+
+
+def parse_qs(qs, keep_blank_values=False, strict_parsing=False,
+             encoding='utf-8', errors='replace', max_num_fields=None, separator='&'):
+    """Parse a query given as a string argument.
+
+        Arguments:
+
+        qs: percent-encoded query string to be parsed
+
+        keep_blank_values: flag indicating whether blank values in
+            percent-encoded queries should be treated as blank strings.
+            A true value indicates that blanks should be retained as
+            blank strings.  The default false value indicates that
+            blank values are to be ignored and treated as if they were
+            not included.
+
+        strict_parsing: flag indicating what to do with parsing errors.
+            If false (the default), errors are silently ignored.
+            If true, errors raise a ValueError exception.
+
+        encoding and errors: specify how to decode percent-encoded sequences
+            into Unicode characters, as accepted by the bytes.decode() method.
+
+        max_num_fields: int. If set, then throws a ValueError if there
+            are more than n fields read by parse_qsl().
+
+        separator: str. The symbol to use for separating the query arguments.
+            Defaults to &.
+
+        Returns a dictionary.
+    """
+    parsed_result = {}
+    pairs = parse_qsl(qs, keep_blank_values, strict_parsing,
+                      encoding=encoding, errors=errors,
+                      max_num_fields=max_num_fields, separator=separator)
+    for name, value in pairs:
+        if name in parsed_result:
+            parsed_result[name].append(value)
+        else:
+            parsed_result[name] = [value]
+    return parsed_result
+
+
+def parse_qsl(qs, keep_blank_values=False, strict_parsing=False,
+              encoding='utf-8', errors='replace', max_num_fields=None, separator='&'):
+    """Parse a query given as a string argument.
+
+        Arguments:
+
+        qs: percent-encoded query string to be parsed
+
+        keep_blank_values: flag indicating whether blank values in
+            percent-encoded queries should be treated as blank strings.
+            A true value indicates that blanks should be retained as blank
+            strings.  The default false value indicates that blank values
+            are to be ignored and treated as if they were  not included.
+
+        strict_parsing: flag indicating what to do with parsing errors. If
+            false (the default), errors are silently ignored. If true,
+            errors raise a ValueError exception.
+
+        encoding and errors: specify how to decode percent-encoded sequences
+            into Unicode characters, as accepted by the bytes.decode() method.
+
+        max_num_fields: int. If set, then throws a ValueError
+            if there are more than n fields read by parse_qsl().
+
+        separator: str. The symbol to use for separating the query arguments.
+            Defaults to &.
+
+        Returns a list, as G-d intended.
+    """
+    qs, _coerce_result = _coerce_args(qs)
+    separator, _ = _coerce_args(separator)
+
+    if not separator or (not isinstance(separator, (str, bytes))):
+        raise ValueError("Separator must be of type string or bytes.")
+
+    # If max_num_fields is defined then check that the number of fields
+    # is less than max_num_fields. This prevents a memory exhaustion DOS
+    # attack via post bodies with many fields.
+    if max_num_fields is not None:
+        num_fields = 1 + qs.count(separator) if qs else 0
+        if max_num_fields < num_fields:
+            raise ValueError('Max number of fields exceeded')
+
+    r = []
+    query_args = qs.split(separator) if qs else []
+    for name_value in query_args:
+        if not name_value and not strict_parsing:
+            continue
+        nv = name_value.split('=', 1)
+        if len(nv) != 2:
+            if strict_parsing:
+                raise ValueError("bad query field: %r" % (name_value,))
+            # Handle case of a control-name with no equal sign
+            if keep_blank_values:
+                nv.append('')
+            else:
+                continue
+        if len(nv[1]) or keep_blank_values:
+            name = nv[0].replace('+', ' ')
+            name = unquote(name, encoding=encoding, errors=errors)
+            name = _coerce_result(name)
+            value = nv[1].replace('+', ' ')
+            value = unquote(value, encoding=encoding, errors=errors)
+            value = _coerce_result(value)
+            r.append((name, value))
+    return r
+
+def unquote_plus(string, encoding='utf-8', errors='replace'):
+    """Like unquote(), but also replace plus signs by spaces, as required for
+    unquoting HTML form values.
+
+    unquote_plus('%7e/abc+def') -> '~/abc def'
+    """
+    string = string.replace('+', ' ')
+    return unquote(string, encoding, errors)
+
+_ALWAYS_SAFE = frozenset(b'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+                         b'abcdefghijklmnopqrstuvwxyz'
+                         b'0123456789'
+                         b'_.-~')
+_ALWAYS_SAFE_BYTES = bytes(_ALWAYS_SAFE)
+
+def __getattr__(name):
+    if name == 'Quoter':
+        warnings.warn('Deprecated in 3.11. '
+                      'urllib.parse.Quoter will be removed in Python 3.14. '
+                      'It was not intended to be a public API.',
+                      DeprecationWarning, stacklevel=2)
+        return _Quoter
+    raise AttributeError(f'module {__name__!r} has no attribute {name!r}')
+
+class _Quoter(dict):
+    """A mapping from bytes numbers (in range(0,256)) to strings.
+
+    String values are percent-encoded byte values, unless the key < 128, and
+    in either of the specified safe set, or the always safe set.
+    """
+    # Keeps a cache internally, via __missing__, for efficiency (lookups
+    # of cached keys don't call Python code at all).
+    def __init__(self, safe):
+        """safe: bytes object."""
+        self.safe = _ALWAYS_SAFE.union(safe)
+
+    def __repr__(self):
+        return f"<Quoter {dict(self)!r}>"
+
+    def __missing__(self, b):
+        # Handle a cache miss. Store quoted string in cache and return.
+        res = chr(b) if b in self.safe else '%{:02X}'.format(b)
+        self[b] = res
+        return res
+
+def quote(string, safe='/', encoding=None, errors=None):
+    """quote('abc def') -> 'abc%20def'
+
+    Each part of a URL, e.g. the path info, the query, etc., has a
+    different set of reserved characters that must be quoted. The
+    quote function offers a cautious (not minimal) way to quote a
+    string for most of these parts.
+
+    RFC 3986 Uniform Resource Identifier (URI): Generic Syntax lists
+    the following (un)reserved characters.
+
+    unreserved    = ALPHA / DIGIT / "-" / "." / "_" / "~"
+    reserved      = gen-delims / sub-delims
+    gen-delims    = ":" / "/" / "?" / "#" / "[" / "]" / "@"
+    sub-delims    = "!" / "$" / "&" / "'" / "(" / ")"
+                  / "*" / "+" / "," / ";" / "="
+
+    Each of the reserved characters is reserved in some component of a URL,
+    but not necessarily in all of them.
+
+    The quote function %-escapes all characters that are neither in the
+    unreserved chars ("always safe") nor the additional chars set via the
+    safe arg.
+
+    The default for the safe arg is '/'. The character is reserved, but in
+    typical usage the quote function is being called on a path where the
+    existing slash characters are to be preserved.
+
+    Python 3.7 updates from using RFC 2396 to RFC 3986 to quote URL strings.
+    Now, "~" is included in the set of unreserved characters.
+
+    string and safe may be either str or bytes objects. encoding and errors
+    must not be specified if string is a bytes object.
+
+    The optional encoding and errors parameters specify how to deal with
+    non-ASCII characters, as accepted by the str.encode method.
+    By default, encoding='utf-8' (characters are encoded with UTF-8), and
+    errors='strict' (unsupported characters raise a UnicodeEncodeError).
+    """
+    if isinstance(string, str):
+        if not string:
+            return string
+        if encoding is None:
+            encoding = 'utf-8'
+        if errors is None:
+            errors = 'strict'
+        string = string.encode(encoding, errors)
+    else:
+        if encoding is not None:
+            raise TypeError("quote() doesn't support 'encoding' for bytes")
+        if errors is not None:
+            raise TypeError("quote() doesn't support 'errors' for bytes")
+    return quote_from_bytes(string, safe)
+
+def quote_plus(string, safe='', encoding=None, errors=None):
+    """Like quote(), but also replace ' ' with '+', as required for quoting
+    HTML form values. Plus signs in the original string are escaped unless
+    they are included in safe. It also does not have safe default to '/'.
+    """
+    # Check if ' ' in string, where string may either be a str or bytes.  If
+    # there are no spaces, the regular quote will produce the right answer.
+    if ((isinstance(string, str) and ' ' not in string) or
+        (isinstance(string, bytes) and b' ' not in string)):
+        return quote(string, safe, encoding, errors)
+    if isinstance(safe, str):
+        space = ' '
+    else:
+        space = b' '
+    string = quote(string, safe + space, encoding, errors)
+    return string.replace(' ', '+')
+
+# Expectation: A typical program is unlikely to create more than 5 of these.
+@functools.lru_cache
+def _byte_quoter_factory(safe):
+    return _Quoter(safe).__getitem__
+
+def quote_from_bytes(bs, safe='/'):
+    """Like quote(), but accepts a bytes object rather than a str, and does
+    not perform string-to-bytes encoding.  It always returns an ASCII string.
+    quote_from_bytes(b'abc def\x3f') -> 'abc%20def%3f'
+    """
+    if not isinstance(bs, (bytes, bytearray)):
+        raise TypeError("quote_from_bytes() expected bytes")
+    if not bs:
+        return ''
+    if isinstance(safe, str):
+        # Normalize 'safe' by converting to bytes and removing non-ASCII chars
+        safe = safe.encode('ascii', 'ignore')
+    else:
+        # List comprehensions are faster than generator expressions.
+        safe = bytes([c for c in safe if c < 128])
+    if not bs.rstrip(_ALWAYS_SAFE_BYTES + safe):
+        return bs.decode()
+    quoter = _byte_quoter_factory(safe)
+    if (bs_len := len(bs)) < 200_000:
+        return ''.join(map(quoter, bs))
+    else:
+        # This saves memory - https://github.com/python/cpython/issues/95865
+        chunk_size = math.isqrt(bs_len)
+        chunks = [''.join(map(quoter, bs[i:i+chunk_size]))
+                  for i in range(0, bs_len, chunk_size)]
+        return ''.join(chunks)
+
+def urlencode(query, doseq=False, safe='', encoding=None, errors=None,
+              quote_via=quote_plus):
+    """Encode a dict or sequence of two-element tuples into a URL query string.
+
+    If any values in the query arg are sequences and doseq is true, each
+    sequence element is converted to a separate parameter.
+
+    If the query arg is a sequence of two-element tuples, the order of the
+    parameters in the output will match the order of parameters in the
+    input.
+
+    The components of a query arg may each be either a string or a bytes type.
+
+    The safe, encoding, and errors parameters are passed down to the function
+    specified by quote_via (encoding and errors only if a component is a str).
+    """
+
+    if hasattr(query, "items"):
+        query = query.items()
+    else:
+        # It's a bother at times that strings and string-like objects are
+        # sequences.
+        try:
+            # non-sequence items should not work with len()
+            # non-empty strings will fail this
+            if len(query) and not isinstance(query[0], tuple):
+                raise TypeError
+            # Zero-length sequences of all types will get here and succeed,
+            # but that's a minor nit.  Since the original implementation
+            # allowed empty dicts that type of behavior probably should be
+            # preserved for consistency
+        except TypeError as err:
+            raise TypeError("not a valid non-string sequence "
+                            "or mapping object") from err
+
+    l = []
+    if not doseq:
+        for k, v in query:
+            if isinstance(k, bytes):
+                k = quote_via(k, safe)
+            else:
+                k = quote_via(str(k), safe, encoding, errors)
+
+            if isinstance(v, bytes):
+                v = quote_via(v, safe)
+            else:
+                v = quote_via(str(v), safe, encoding, errors)
+            l.append(k + '=' + v)
+    else:
+        for k, v in query:
+            if isinstance(k, bytes):
+                k = quote_via(k, safe)
+            else:
+                k = quote_via(str(k), safe, encoding, errors)
+
+            if isinstance(v, bytes):
+                v = quote_via(v, safe)
+                l.append(k + '=' + v)
+            elif isinstance(v, str):
+                v = quote_via(v, safe, encoding, errors)
+                l.append(k + '=' + v)
+            else:
+                try:
+                    # Is this a sufficient test for sequence-ness?
+                    x = len(v)
+                except TypeError:
+                    # not a sequence
+                    v = quote_via(str(v), safe, encoding, errors)
+                    l.append(k + '=' + v)
+                else:
+                    # loop over the sequence
+                    for elt in v:
+                        if isinstance(elt, bytes):
+                            elt = quote_via(elt, safe)
+                        else:
+                            elt = quote_via(str(elt), safe, encoding, errors)
+                        l.append(k + '=' + elt)
+    return '&'.join(l)
+
+
+def to_bytes(url):
+    warnings.warn("urllib.parse.to_bytes() is deprecated as of 3.8",
+                  DeprecationWarning, stacklevel=2)
+    return _to_bytes(url)
+
+
+def _to_bytes(url):
+    """to_bytes(u"URL") --> 'URL'."""
+    # Most URL schemes require ASCII. If that changes, the conversion
+    # can be relaxed.
+    # XXX get rid of to_bytes()
+    if isinstance(url, str):
+        try:
+            url = url.encode("ASCII").decode()
+        except UnicodeError:
+            raise UnicodeError("URL " + repr(url) +
+                               " contains non-ASCII characters")
+    return url
+
+
+def unwrap(url):
+    """Transform a string like '<URL:scheme://host/path>' into 'scheme://host/path'.
+
+    The string is returned unchanged if it's not a wrapped URL.
+    """
+    url = str(url).strip()
+    if url[:1] == '<' and url[-1:] == '>':
+        url = url[1:-1].strip()
+    if url[:4] == 'URL:':
+        url = url[4:].strip()
+    return url
+
+
+def splittype(url):
+    warnings.warn("urllib.parse.splittype() is deprecated as of 3.8, "
+                  "use urllib.parse.urlparse() instead",
+                  DeprecationWarning, stacklevel=2)
+    return _splittype(url)
+
+
+_typeprog = None
+def _splittype(url):
+    """splittype('type:opaquestring') --> 'type', 'opaquestring'."""
+    global _typeprog
+    if _typeprog is None:
+        _typeprog = re.compile('([^/:]+):(.*)', re.DOTALL)
+
+    match = _typeprog.match(url)
+    if match:
+        scheme, data = match.groups()
+        return scheme.lower(), data
+    return None, url
+
+
+def splithost(url):
+    warnings.warn("urllib.parse.splithost() is deprecated as of 3.8, "
+                  "use urllib.parse.urlparse() instead",
+                  DeprecationWarning, stacklevel=2)
+    return _splithost(url)
+
+
+_hostprog = None
+def _splithost(url):
+    """splithost('//host[:port]/path') --> 'host[:port]', '/path'."""
+    global _hostprog
+    if _hostprog is None:
+        _hostprog = re.compile('//([^/#?]*)(.*)', re.DOTALL)
+
+    match = _hostprog.match(url)
+    if match:
+        host_port, path = match.groups()
+        if path and path[0] != '/':
+            path = '/' + path
+        return host_port, path
+    return None, url
+
+
+def splituser(host):
+    warnings.warn("urllib.parse.splituser() is deprecated as of 3.8, "
+                  "use urllib.parse.urlparse() instead",
+                  DeprecationWarning, stacklevel=2)
+    return _splituser(host)
+
+
+def _splituser(host):
+    """splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]'."""
+    user, delim, host = host.rpartition('@')
+    return (user if delim else None), host
+
+
+def splitpasswd(user):
+    warnings.warn("urllib.parse.splitpasswd() is deprecated as of 3.8, "
+                  "use urllib.parse.urlparse() instead",
+                  DeprecationWarning, stacklevel=2)
+    return _splitpasswd(user)
+
+
+def _splitpasswd(user):
+    """splitpasswd('user:passwd') -> 'user', 'passwd'."""
+    user, delim, passwd = user.partition(':')
+    return user, (passwd if delim else None)
+
+
+def splitport(host):
+    warnings.warn("urllib.parse.splitport() is deprecated as of 3.8, "
+                  "use urllib.parse.urlparse() instead",
+                  DeprecationWarning, stacklevel=2)
+    return _splitport(host)
+
+
+# splittag('/path#tag') --> '/path', 'tag'
+_portprog = None
+def _splitport(host):
+    """splitport('host:port') --> 'host', 'port'."""
+    global _portprog
+    if _portprog is None:
+        _portprog = re.compile('(.*):([0-9]*)', re.DOTALL)
+
+    match = _portprog.fullmatch(host)
+    if match:
+        host, port = match.groups()
+        if port:
+            return host, port
+    return host, None
+
+
+def splitnport(host, defport=-1):
+    warnings.warn("urllib.parse.splitnport() is deprecated as of 3.8, "
+                  "use urllib.parse.urlparse() instead",
+                  DeprecationWarning, stacklevel=2)
+    return _splitnport(host, defport)
+
+
+def _splitnport(host, defport=-1):
+    """Split host and port, returning numeric port.
+    Return given default port if no ':' found; defaults to -1.
+    Return numerical port if a valid number is found after ':'.
+    Return None if ':' but not a valid number."""
+    host, delim, port = host.rpartition(':')
+    if not delim:
+        host = port
+    elif port:
+        if port.isdigit() and port.isascii():
+            nport = int(port)
+        else:
+            nport = None
+        return host, nport
+    return host, defport
+
+
+def splitquery(url):
+    warnings.warn("urllib.parse.splitquery() is deprecated as of 3.8, "
+                  "use urllib.parse.urlparse() instead",
+                  DeprecationWarning, stacklevel=2)
+    return _splitquery(url)
+
+
+def _splitquery(url):
+    """splitquery('/path?query') --> '/path', 'query'."""
+    path, delim, query = url.rpartition('?')
+    if delim:
+        return path, query
+    return url, None
+
+
+def splittag(url):
+    warnings.warn("urllib.parse.splittag() is deprecated as of 3.8, "
+                  "use urllib.parse.urlparse() instead",
+                  DeprecationWarning, stacklevel=2)
+    return _splittag(url)
+
+
+def _splittag(url):
+    """splittag('/path#tag') --> '/path', 'tag'."""
+    path, delim, tag = url.rpartition('#')
+    if delim:
+        return path, tag
+    return url, None
+
+
+def splitattr(url):
+    warnings.warn("urllib.parse.splitattr() is deprecated as of 3.8, "
+                  "use urllib.parse.urlparse() instead",
+                  DeprecationWarning, stacklevel=2)
+    return _splitattr(url)
+
+
+def _splitattr(url):
+    """splitattr('/path;attr1=value1;attr2=value2;...') ->
+        '/path', ['attr1=value1', 'attr2=value2', ...]."""
+    words = url.split(';')
+    return words[0], words[1:]
+
+
+def splitvalue(attr):
+    warnings.warn("urllib.parse.splitvalue() is deprecated as of 3.8, "
+                  "use urllib.parse.parse_qsl() instead",
+                  DeprecationWarning, stacklevel=2)
+    return _splitvalue(attr)
+
+
+def _splitvalue(attr):
+    """splitvalue('attr=value') --> 'attr', 'value'."""
+    attr, delim, value = attr.partition('=')
+    return attr, (value if delim else None)