1068 lines
36 KiB
Python
1068 lines
36 KiB
Python
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"""Functions for working with URLs.
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Contains implementations of functions from :mod:`urllib.parse` that
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handle bytes and strings.
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"""
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import codecs
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import os
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import re
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import typing as t
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from ._internal import _check_str_tuple
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from ._internal import _decode_idna
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from ._internal import _encode_idna
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from ._internal import _make_encode_wrapper
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from ._internal import _to_str
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if t.TYPE_CHECKING:
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from . import datastructures as ds
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# A regular expression for what a valid schema looks like
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_scheme_re = re.compile(r"^[a-zA-Z0-9+-.]+$")
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# Characters that are safe in any part of an URL.
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_always_safe = frozenset(
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bytearray(
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b"abcdefghijklmnopqrstuvwxyz"
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b"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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b"0123456789"
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b"-._~"
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b"$!'()*+,;" # RFC3986 sub-delims set, not including query string delimiters &=
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)
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)
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_hexdigits = "0123456789ABCDEFabcdef"
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_hextobyte = {
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f"{a}{b}".encode("ascii"): int(f"{a}{b}", 16)
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for a in _hexdigits
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for b in _hexdigits
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}
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_bytetohex = [f"%{char:02X}".encode("ascii") for char in range(256)]
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class _URLTuple(t.NamedTuple):
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scheme: str
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netloc: str
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path: str
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query: str
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fragment: str
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class BaseURL(_URLTuple):
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"""Superclass of :py:class:`URL` and :py:class:`BytesURL`."""
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__slots__ = ()
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_at: str
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_colon: str
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_lbracket: str
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_rbracket: str
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def __str__(self) -> str:
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return self.to_url()
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def replace(self, **kwargs: t.Any) -> "BaseURL":
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"""Return an URL with the same values, except for those parameters
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given new values by whichever keyword arguments are specified."""
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return self._replace(**kwargs)
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@property
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def host(self) -> t.Optional[str]:
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"""The host part of the URL if available, otherwise `None`. The
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host is either the hostname or the IP address mentioned in the
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URL. It will not contain the port.
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"""
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return self._split_host()[0]
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@property
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def ascii_host(self) -> t.Optional[str]:
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"""Works exactly like :attr:`host` but will return a result that
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is restricted to ASCII. If it finds a netloc that is not ASCII
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it will attempt to idna decode it. This is useful for socket
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operations when the URL might include internationalized characters.
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"""
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rv = self.host
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if rv is not None and isinstance(rv, str):
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try:
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rv = _encode_idna(rv) # type: ignore
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except UnicodeError:
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rv = rv.encode("ascii", "ignore") # type: ignore
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return _to_str(rv, "ascii", "ignore")
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@property
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def port(self) -> t.Optional[int]:
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"""The port in the URL as an integer if it was present, `None`
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otherwise. This does not fill in default ports.
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"""
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try:
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rv = int(_to_str(self._split_host()[1]))
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if 0 <= rv <= 65535:
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return rv
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except (ValueError, TypeError):
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pass
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return None
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@property
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def auth(self) -> t.Optional[str]:
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"""The authentication part in the URL if available, `None`
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otherwise.
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"""
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return self._split_netloc()[0]
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@property
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def username(self) -> t.Optional[str]:
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"""The username if it was part of the URL, `None` otherwise.
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This undergoes URL decoding and will always be a string.
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"""
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rv = self._split_auth()[0]
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if rv is not None:
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return _url_unquote_legacy(rv)
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return None
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@property
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def raw_username(self) -> t.Optional[str]:
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"""The username if it was part of the URL, `None` otherwise.
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Unlike :attr:`username` this one is not being decoded.
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"""
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return self._split_auth()[0]
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@property
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def password(self) -> t.Optional[str]:
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"""The password if it was part of the URL, `None` otherwise.
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This undergoes URL decoding and will always be a string.
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"""
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rv = self._split_auth()[1]
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if rv is not None:
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return _url_unquote_legacy(rv)
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return None
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@property
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def raw_password(self) -> t.Optional[str]:
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"""The password if it was part of the URL, `None` otherwise.
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Unlike :attr:`password` this one is not being decoded.
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"""
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return self._split_auth()[1]
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def decode_query(self, *args: t.Any, **kwargs: t.Any) -> "ds.MultiDict[str, str]":
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"""Decodes the query part of the URL. Ths is a shortcut for
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calling :func:`url_decode` on the query argument. The arguments and
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keyword arguments are forwarded to :func:`url_decode` unchanged.
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"""
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return url_decode(self.query, *args, **kwargs)
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def join(self, *args: t.Any, **kwargs: t.Any) -> "BaseURL":
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"""Joins this URL with another one. This is just a convenience
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function for calling into :meth:`url_join` and then parsing the
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return value again.
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"""
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return url_parse(url_join(self, *args, **kwargs))
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def to_url(self) -> str:
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"""Returns a URL string or bytes depending on the type of the
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information stored. This is just a convenience function
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for calling :meth:`url_unparse` for this URL.
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"""
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return url_unparse(self)
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def encode_netloc(self) -> str:
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"""Encodes the netloc part to an ASCII safe URL as bytes."""
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rv = self.ascii_host or ""
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if ":" in rv:
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rv = f"[{rv}]"
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port = self.port
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if port is not None:
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rv = f"{rv}:{port}"
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auth = ":".join(
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filter(
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None,
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[
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url_quote(self.raw_username or "", "utf-8", "strict", "/:%"),
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url_quote(self.raw_password or "", "utf-8", "strict", "/:%"),
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],
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)
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)
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if auth:
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rv = f"{auth}@{rv}"
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return rv
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def decode_netloc(self) -> str:
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"""Decodes the netloc part into a string."""
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rv = _decode_idna(self.host or "")
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if ":" in rv:
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rv = f"[{rv}]"
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port = self.port
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if port is not None:
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rv = f"{rv}:{port}"
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auth = ":".join(
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filter(
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None,
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[
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_url_unquote_legacy(self.raw_username or "", "/:%@"),
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_url_unquote_legacy(self.raw_password or "", "/:%@"),
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],
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)
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)
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if auth:
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rv = f"{auth}@{rv}"
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return rv
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def to_uri_tuple(self) -> "BaseURL":
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"""Returns a :class:`BytesURL` tuple that holds a URI. This will
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encode all the information in the URL properly to ASCII using the
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rules a web browser would follow.
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It's usually more interesting to directly call :meth:`iri_to_uri` which
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will return a string.
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"""
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return url_parse(iri_to_uri(self))
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def to_iri_tuple(self) -> "BaseURL":
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"""Returns a :class:`URL` tuple that holds a IRI. This will try
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to decode as much information as possible in the URL without
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losing information similar to how a web browser does it for the
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URL bar.
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It's usually more interesting to directly call :meth:`uri_to_iri` which
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will return a string.
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"""
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return url_parse(uri_to_iri(self))
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def get_file_location(
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self, pathformat: t.Optional[str] = None
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) -> t.Tuple[t.Optional[str], t.Optional[str]]:
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"""Returns a tuple with the location of the file in the form
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``(server, location)``. If the netloc is empty in the URL or
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points to localhost, it's represented as ``None``.
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The `pathformat` by default is autodetection but needs to be set
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when working with URLs of a specific system. The supported values
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are ``'windows'`` when working with Windows or DOS paths and
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``'posix'`` when working with posix paths.
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If the URL does not point to a local file, the server and location
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are both represented as ``None``.
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:param pathformat: The expected format of the path component.
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Currently ``'windows'`` and ``'posix'`` are
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supported. Defaults to ``None`` which is
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autodetect.
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"""
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if self.scheme != "file":
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return None, None
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path = url_unquote(self.path)
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host = self.netloc or None
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if pathformat is None:
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if os.name == "nt":
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pathformat = "windows"
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else:
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pathformat = "posix"
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if pathformat == "windows":
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if path[:1] == "/" and path[1:2].isalpha() and path[2:3] in "|:":
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path = f"{path[1:2]}:{path[3:]}"
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windows_share = path[:3] in ("\\" * 3, "/" * 3)
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import ntpath
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path = ntpath.normpath(path)
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# Windows shared drives are represented as ``\\host\\directory``.
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# That results in a URL like ``file://///host/directory``, and a
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# path like ``///host/directory``. We need to special-case this
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# because the path contains the hostname.
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if windows_share and host is None:
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parts = path.lstrip("\\").split("\\", 1)
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if len(parts) == 2:
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host, path = parts
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else:
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host = parts[0]
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path = ""
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elif pathformat == "posix":
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import posixpath
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path = posixpath.normpath(path)
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else:
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raise TypeError(f"Invalid path format {pathformat!r}")
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if host in ("127.0.0.1", "::1", "localhost"):
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host = None
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return host, path
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def _split_netloc(self) -> t.Tuple[t.Optional[str], str]:
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if self._at in self.netloc:
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auth, _, netloc = self.netloc.partition(self._at)
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return auth, netloc
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return None, self.netloc
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def _split_auth(self) -> t.Tuple[t.Optional[str], t.Optional[str]]:
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auth = self._split_netloc()[0]
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if not auth:
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return None, None
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if self._colon not in auth:
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return auth, None
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username, _, password = auth.partition(self._colon)
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return username, password
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def _split_host(self) -> t.Tuple[t.Optional[str], t.Optional[str]]:
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rv = self._split_netloc()[1]
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if not rv:
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return None, None
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if not rv.startswith(self._lbracket):
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if self._colon in rv:
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host, _, port = rv.partition(self._colon)
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return host, port
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return rv, None
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idx = rv.find(self._rbracket)
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if idx < 0:
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return rv, None
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host = rv[1:idx]
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rest = rv[idx + 1 :]
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if rest.startswith(self._colon):
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return host, rest[1:]
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return host, None
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class URL(BaseURL):
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"""Represents a parsed URL. This behaves like a regular tuple but
|
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also has some extra attributes that give further insight into the
|
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URL.
|
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"""
|
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__slots__ = ()
|
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_at = "@"
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_colon = ":"
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_lbracket = "["
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_rbracket = "]"
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def encode(self, charset: str = "utf-8", errors: str = "replace") -> "BytesURL":
|
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"""Encodes the URL to a tuple made out of bytes. The charset is
|
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only being used for the path, query and fragment.
|
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"""
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return BytesURL(
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self.scheme.encode("ascii"), # type: ignore
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self.encode_netloc(),
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self.path.encode(charset, errors), # type: ignore
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self.query.encode(charset, errors), # type: ignore
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self.fragment.encode(charset, errors), # type: ignore
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)
|
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|
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class BytesURL(BaseURL):
|
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"""Represents a parsed URL in bytes."""
|
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|
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__slots__ = ()
|
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_at = b"@" # type: ignore
|
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_colon = b":" # type: ignore
|
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_lbracket = b"[" # type: ignore
|
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_rbracket = b"]" # type: ignore
|
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def __str__(self) -> str:
|
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return self.to_url().decode("utf-8", "replace") # type: ignore
|
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def encode_netloc(self) -> bytes: # type: ignore
|
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"""Returns the netloc unchanged as bytes."""
|
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return self.netloc # type: ignore
|
||
|
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|
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def decode(self, charset: str = "utf-8", errors: str = "replace") -> "URL":
|
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|
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"""Decodes the URL to a tuple made out of strings. The charset is
|
||
|
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only being used for the path, query and fragment.
|
||
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"""
|
||
|
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return URL(
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|
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self.scheme.decode("ascii"), # type: ignore
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||
|
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self.decode_netloc(),
|
||
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self.path.decode(charset, errors), # type: ignore
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||
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self.query.decode(charset, errors), # type: ignore
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self.fragment.decode(charset, errors), # type: ignore
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||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
_unquote_maps: t.Dict[t.FrozenSet[int], t.Dict[bytes, int]] = {frozenset(): _hextobyte}
|
||
|
|
|
||
|
|
|
||
|
|
def _unquote_to_bytes(
|
||
|
|
string: t.Union[str, bytes], unsafe: t.Union[str, bytes] = ""
|
||
|
|
) -> bytes:
|
||
|
|
if isinstance(string, str):
|
||
|
|
string = string.encode("utf-8")
|
||
|
|
|
||
|
|
if isinstance(unsafe, str):
|
||
|
|
unsafe = unsafe.encode("utf-8")
|
||
|
|
|
||
|
|
unsafe = frozenset(bytearray(unsafe))
|
||
|
|
groups = iter(string.split(b"%"))
|
||
|
|
result = bytearray(next(groups, b""))
|
||
|
|
|
||
|
|
try:
|
||
|
|
hex_to_byte = _unquote_maps[unsafe]
|
||
|
|
except KeyError:
|
||
|
|
hex_to_byte = _unquote_maps[unsafe] = {
|
||
|
|
h: b for h, b in _hextobyte.items() if b not in unsafe
|
||
|
|
}
|
||
|
|
|
||
|
|
for group in groups:
|
||
|
|
code = group[:2]
|
||
|
|
|
||
|
|
if code in hex_to_byte:
|
||
|
|
result.append(hex_to_byte[code])
|
||
|
|
result.extend(group[2:])
|
||
|
|
else:
|
||
|
|
result.append(37) # %
|
||
|
|
result.extend(group)
|
||
|
|
|
||
|
|
return bytes(result)
|
||
|
|
|
||
|
|
|
||
|
|
def _url_encode_impl(
|
||
|
|
obj: t.Union[t.Mapping[str, str], t.Iterable[t.Tuple[str, str]]],
|
||
|
|
charset: str,
|
||
|
|
sort: bool,
|
||
|
|
key: t.Optional[t.Callable[[t.Tuple[str, str]], t.Any]],
|
||
|
|
) -> t.Iterator[str]:
|
||
|
|
from .datastructures import iter_multi_items
|
||
|
|
|
||
|
|
iterable: t.Iterable[t.Tuple[str, str]] = iter_multi_items(obj)
|
||
|
|
|
||
|
|
if sort:
|
||
|
|
iterable = sorted(iterable, key=key)
|
||
|
|
|
||
|
|
for key_str, value_str in iterable:
|
||
|
|
if value_str is None:
|
||
|
|
continue
|
||
|
|
|
||
|
|
if not isinstance(key_str, bytes):
|
||
|
|
key_bytes = str(key_str).encode(charset)
|
||
|
|
else:
|
||
|
|
key_bytes = key_str
|
||
|
|
|
||
|
|
if not isinstance(value_str, bytes):
|
||
|
|
value_bytes = str(value_str).encode(charset)
|
||
|
|
else:
|
||
|
|
value_bytes = value_str
|
||
|
|
|
||
|
|
yield f"{_fast_url_quote_plus(key_bytes)}={_fast_url_quote_plus(value_bytes)}"
|
||
|
|
|
||
|
|
|
||
|
|
def _url_unquote_legacy(value: str, unsafe: str = "") -> str:
|
||
|
|
try:
|
||
|
|
return url_unquote(value, charset="utf-8", errors="strict", unsafe=unsafe)
|
||
|
|
except UnicodeError:
|
||
|
|
return url_unquote(value, charset="latin1", unsafe=unsafe)
|
||
|
|
|
||
|
|
|
||
|
|
def url_parse(
|
||
|
|
url: str, scheme: t.Optional[str] = None, allow_fragments: bool = True
|
||
|
|
) -> BaseURL:
|
||
|
|
"""Parses a URL from a string into a :class:`URL` tuple. If the URL
|
||
|
|
is lacking a scheme it can be provided as second argument. Otherwise,
|
||
|
|
it is ignored. Optionally fragments can be stripped from the URL
|
||
|
|
by setting `allow_fragments` to `False`.
|
||
|
|
|
||
|
|
The inverse of this function is :func:`url_unparse`.
|
||
|
|
|
||
|
|
:param url: the URL to parse.
|
||
|
|
:param scheme: the default schema to use if the URL is schemaless.
|
||
|
|
:param allow_fragments: if set to `False` a fragment will be removed
|
||
|
|
from the URL.
|
||
|
|
"""
|
||
|
|
s = _make_encode_wrapper(url)
|
||
|
|
is_text_based = isinstance(url, str)
|
||
|
|
|
||
|
|
if scheme is None:
|
||
|
|
scheme = s("")
|
||
|
|
netloc = query = fragment = s("")
|
||
|
|
i = url.find(s(":"))
|
||
|
|
if i > 0 and _scheme_re.match(_to_str(url[:i], errors="replace")):
|
||
|
|
# make sure "iri" is not actually a port number (in which case
|
||
|
|
# "scheme" is really part of the path)
|
||
|
|
rest = url[i + 1 :]
|
||
|
|
if not rest or any(c not in s("0123456789") for c in rest):
|
||
|
|
# not a port number
|
||
|
|
scheme, url = url[:i].lower(), rest
|
||
|
|
|
||
|
|
if url[:2] == s("//"):
|
||
|
|
delim = len(url)
|
||
|
|
for c in s("/?#"):
|
||
|
|
wdelim = url.find(c, 2)
|
||
|
|
if wdelim >= 0:
|
||
|
|
delim = min(delim, wdelim)
|
||
|
|
netloc, url = url[2:delim], url[delim:]
|
||
|
|
if (s("[") in netloc and s("]") not in netloc) or (
|
||
|
|
s("]") in netloc and s("[") not in netloc
|
||
|
|
):
|
||
|
|
raise ValueError("Invalid IPv6 URL")
|
||
|
|
|
||
|
|
if allow_fragments and s("#") in url:
|
||
|
|
url, fragment = url.split(s("#"), 1)
|
||
|
|
if s("?") in url:
|
||
|
|
url, query = url.split(s("?"), 1)
|
||
|
|
|
||
|
|
result_type = URL if is_text_based else BytesURL
|
||
|
|
return result_type(scheme, netloc, url, query, fragment)
|
||
|
|
|
||
|
|
|
||
|
|
def _make_fast_url_quote(
|
||
|
|
charset: str = "utf-8",
|
||
|
|
errors: str = "strict",
|
||
|
|
safe: t.Union[str, bytes] = "/:",
|
||
|
|
unsafe: t.Union[str, bytes] = "",
|
||
|
|
) -> t.Callable[[bytes], str]:
|
||
|
|
"""Precompile the translation table for a URL encoding function.
|
||
|
|
|
||
|
|
Unlike :func:`url_quote`, the generated function only takes the
|
||
|
|
string to quote.
|
||
|
|
|
||
|
|
:param charset: The charset to encode the result with.
|
||
|
|
:param errors: How to handle encoding errors.
|
||
|
|
:param safe: An optional sequence of safe characters to never encode.
|
||
|
|
:param unsafe: An optional sequence of unsafe characters to always encode.
|
||
|
|
"""
|
||
|
|
if isinstance(safe, str):
|
||
|
|
safe = safe.encode(charset, errors)
|
||
|
|
|
||
|
|
if isinstance(unsafe, str):
|
||
|
|
unsafe = unsafe.encode(charset, errors)
|
||
|
|
|
||
|
|
safe = (frozenset(bytearray(safe)) | _always_safe) - frozenset(bytearray(unsafe))
|
||
|
|
table = [chr(c) if c in safe else f"%{c:02X}" for c in range(256)]
|
||
|
|
|
||
|
|
def quote(string: bytes) -> str:
|
||
|
|
return "".join([table[c] for c in string])
|
||
|
|
|
||
|
|
return quote
|
||
|
|
|
||
|
|
|
||
|
|
_fast_url_quote = _make_fast_url_quote()
|
||
|
|
_fast_quote_plus = _make_fast_url_quote(safe=" ", unsafe="+")
|
||
|
|
|
||
|
|
|
||
|
|
def _fast_url_quote_plus(string: bytes) -> str:
|
||
|
|
return _fast_quote_plus(string).replace(" ", "+")
|
||
|
|
|
||
|
|
|
||
|
|
def url_quote(
|
||
|
|
string: t.Union[str, bytes],
|
||
|
|
charset: str = "utf-8",
|
||
|
|
errors: str = "strict",
|
||
|
|
safe: t.Union[str, bytes] = "/:",
|
||
|
|
unsafe: t.Union[str, bytes] = "",
|
||
|
|
) -> str:
|
||
|
|
"""URL encode a single string with a given encoding.
|
||
|
|
|
||
|
|
:param s: the string to quote.
|
||
|
|
:param charset: the charset to be used.
|
||
|
|
:param safe: an optional sequence of safe characters.
|
||
|
|
:param unsafe: an optional sequence of unsafe characters.
|
||
|
|
|
||
|
|
.. versionadded:: 0.9.2
|
||
|
|
The `unsafe` parameter was added.
|
||
|
|
"""
|
||
|
|
if not isinstance(string, (str, bytes, bytearray)):
|
||
|
|
string = str(string)
|
||
|
|
if isinstance(string, str):
|
||
|
|
string = string.encode(charset, errors)
|
||
|
|
if isinstance(safe, str):
|
||
|
|
safe = safe.encode(charset, errors)
|
||
|
|
if isinstance(unsafe, str):
|
||
|
|
unsafe = unsafe.encode(charset, errors)
|
||
|
|
safe = (frozenset(bytearray(safe)) | _always_safe) - frozenset(bytearray(unsafe))
|
||
|
|
rv = bytearray()
|
||
|
|
for char in bytearray(string):
|
||
|
|
if char in safe:
|
||
|
|
rv.append(char)
|
||
|
|
else:
|
||
|
|
rv.extend(_bytetohex[char])
|
||
|
|
return bytes(rv).decode(charset)
|
||
|
|
|
||
|
|
|
||
|
|
def url_quote_plus(
|
||
|
|
string: str, charset: str = "utf-8", errors: str = "strict", safe: str = ""
|
||
|
|
) -> str:
|
||
|
|
"""URL encode a single string with the given encoding and convert
|
||
|
|
whitespace to "+".
|
||
|
|
|
||
|
|
:param s: The string to quote.
|
||
|
|
:param charset: The charset to be used.
|
||
|
|
:param safe: An optional sequence of safe characters.
|
||
|
|
"""
|
||
|
|
return url_quote(string, charset, errors, safe + " ", "+").replace(" ", "+")
|
||
|
|
|
||
|
|
|
||
|
|
def url_unparse(components: t.Tuple[str, str, str, str, str]) -> str:
|
||
|
|
"""The reverse operation to :meth:`url_parse`. This accepts arbitrary
|
||
|
|
as well as :class:`URL` tuples and returns a URL as a string.
|
||
|
|
|
||
|
|
:param components: the parsed URL as tuple which should be converted
|
||
|
|
into a URL string.
|
||
|
|
"""
|
||
|
|
_check_str_tuple(components)
|
||
|
|
scheme, netloc, path, query, fragment = components
|
||
|
|
s = _make_encode_wrapper(scheme)
|
||
|
|
url = s("")
|
||
|
|
|
||
|
|
# We generally treat file:///x and file:/x the same which is also
|
||
|
|
# what browsers seem to do. This also allows us to ignore a schema
|
||
|
|
# register for netloc utilization or having to differentiate between
|
||
|
|
# empty and missing netloc.
|
||
|
|
if netloc or (scheme and path.startswith(s("/"))):
|
||
|
|
if path and path[:1] != s("/"):
|
||
|
|
path = s("/") + path
|
||
|
|
url = s("//") + (netloc or s("")) + path
|
||
|
|
elif path:
|
||
|
|
url += path
|
||
|
|
if scheme:
|
||
|
|
url = scheme + s(":") + url
|
||
|
|
if query:
|
||
|
|
url = url + s("?") + query
|
||
|
|
if fragment:
|
||
|
|
url = url + s("#") + fragment
|
||
|
|
return url
|
||
|
|
|
||
|
|
|
||
|
|
def url_unquote(
|
||
|
|
s: t.Union[str, bytes],
|
||
|
|
charset: str = "utf-8",
|
||
|
|
errors: str = "replace",
|
||
|
|
unsafe: str = "",
|
||
|
|
) -> str:
|
||
|
|
"""URL decode a single string with a given encoding. If the charset
|
||
|
|
is set to `None` no decoding is performed and raw bytes are
|
||
|
|
returned.
|
||
|
|
|
||
|
|
:param s: the string to unquote.
|
||
|
|
:param charset: the charset of the query string. If set to `None`
|
||
|
|
no decoding will take place.
|
||
|
|
:param errors: the error handling for the charset decoding.
|
||
|
|
"""
|
||
|
|
rv = _unquote_to_bytes(s, unsafe)
|
||
|
|
if charset is None:
|
||
|
|
return rv
|
||
|
|
return rv.decode(charset, errors)
|
||
|
|
|
||
|
|
|
||
|
|
def url_unquote_plus(
|
||
|
|
s: t.Union[str, bytes], charset: str = "utf-8", errors: str = "replace"
|
||
|
|
) -> str:
|
||
|
|
"""URL decode a single string with the given `charset` and decode "+" to
|
||
|
|
whitespace.
|
||
|
|
|
||
|
|
Per default encoding errors are ignored. If you want a different behavior
|
||
|
|
you can set `errors` to ``'replace'`` or ``'strict'``.
|
||
|
|
|
||
|
|
:param s: The string to unquote.
|
||
|
|
:param charset: the charset of the query string. If set to `None`
|
||
|
|
no decoding will take place.
|
||
|
|
:param errors: The error handling for the `charset` decoding.
|
||
|
|
"""
|
||
|
|
if isinstance(s, str):
|
||
|
|
s = s.replace("+", " ")
|
||
|
|
else:
|
||
|
|
s = s.replace(b"+", b" ")
|
||
|
|
return url_unquote(s, charset, errors)
|
||
|
|
|
||
|
|
|
||
|
|
def url_fix(s: str, charset: str = "utf-8") -> str:
|
||
|
|
r"""Sometimes you get an URL by a user that just isn't a real URL because
|
||
|
|
it contains unsafe characters like ' ' and so on. This function can fix
|
||
|
|
some of the problems in a similar way browsers handle data entered by the
|
||
|
|
user:
|
||
|
|
|
||
|
|
>>> url_fix('http://de.wikipedia.org/wiki/Elf (Begriffskl\xe4rung)')
|
||
|
|
'http://de.wikipedia.org/wiki/Elf%20(Begriffskl%C3%A4rung)'
|
||
|
|
|
||
|
|
:param s: the string with the URL to fix.
|
||
|
|
:param charset: The target charset for the URL if the url was given
|
||
|
|
as a string.
|
||
|
|
"""
|
||
|
|
# First step is to switch to text processing and to convert
|
||
|
|
# backslashes (which are invalid in URLs anyways) to slashes. This is
|
||
|
|
# consistent with what Chrome does.
|
||
|
|
s = _to_str(s, charset, "replace").replace("\\", "/")
|
||
|
|
|
||
|
|
# For the specific case that we look like a malformed windows URL
|
||
|
|
# we want to fix this up manually:
|
||
|
|
if s.startswith("file://") and s[7:8].isalpha() and s[8:10] in (":/", "|/"):
|
||
|
|
s = f"file:///{s[7:]}"
|
||
|
|
|
||
|
|
url = url_parse(s)
|
||
|
|
path = url_quote(url.path, charset, safe="/%+$!*'(),")
|
||
|
|
qs = url_quote_plus(url.query, charset, safe=":&%=+$!*'(),")
|
||
|
|
anchor = url_quote_plus(url.fragment, charset, safe=":&%=+$!*'(),")
|
||
|
|
return url_unparse((url.scheme, url.encode_netloc(), path, qs, anchor))
|
||
|
|
|
||
|
|
|
||
|
|
# not-unreserved characters remain quoted when unquoting to IRI
|
||
|
|
_to_iri_unsafe = "".join([chr(c) for c in range(128) if c not in _always_safe])
|
||
|
|
|
||
|
|
|
||
|
|
def _codec_error_url_quote(e: UnicodeError) -> t.Tuple[str, int]:
|
||
|
|
"""Used in :func:`uri_to_iri` after unquoting to re-quote any
|
||
|
|
invalid bytes.
|
||
|
|
"""
|
||
|
|
# the docs state that UnicodeError does have these attributes,
|
||
|
|
# but mypy isn't picking them up
|
||
|
|
out = _fast_url_quote(e.object[e.start : e.end]) # type: ignore
|
||
|
|
return out, e.end # type: ignore
|
||
|
|
|
||
|
|
|
||
|
|
codecs.register_error("werkzeug.url_quote", _codec_error_url_quote)
|
||
|
|
|
||
|
|
|
||
|
|
def uri_to_iri(
|
||
|
|
uri: t.Union[str, t.Tuple[str, str, str, str, str]],
|
||
|
|
charset: str = "utf-8",
|
||
|
|
errors: str = "werkzeug.url_quote",
|
||
|
|
) -> str:
|
||
|
|
"""Convert a URI to an IRI. All valid UTF-8 characters are unquoted,
|
||
|
|
leaving all reserved and invalid characters quoted. If the URL has
|
||
|
|
a domain, it is decoded from Punycode.
|
||
|
|
|
||
|
|
>>> uri_to_iri("http://xn--n3h.net/p%C3%A5th?q=%C3%A8ry%DF")
|
||
|
|
'http://\\u2603.net/p\\xe5th?q=\\xe8ry%DF'
|
||
|
|
|
||
|
|
:param uri: The URI to convert.
|
||
|
|
:param charset: The encoding to encode unquoted bytes with.
|
||
|
|
:param errors: Error handler to use during ``bytes.encode``. By
|
||
|
|
default, invalid bytes are left quoted.
|
||
|
|
|
||
|
|
.. versionchanged:: 0.15
|
||
|
|
All reserved and invalid characters remain quoted. Previously,
|
||
|
|
only some reserved characters were preserved, and invalid bytes
|
||
|
|
were replaced instead of left quoted.
|
||
|
|
|
||
|
|
.. versionadded:: 0.6
|
||
|
|
"""
|
||
|
|
if isinstance(uri, tuple):
|
||
|
|
uri = url_unparse(uri)
|
||
|
|
|
||
|
|
uri = url_parse(_to_str(uri, charset))
|
||
|
|
path = url_unquote(uri.path, charset, errors, _to_iri_unsafe)
|
||
|
|
query = url_unquote(uri.query, charset, errors, _to_iri_unsafe)
|
||
|
|
fragment = url_unquote(uri.fragment, charset, errors, _to_iri_unsafe)
|
||
|
|
return url_unparse((uri.scheme, uri.decode_netloc(), path, query, fragment))
|
||
|
|
|
||
|
|
|
||
|
|
# reserved characters remain unquoted when quoting to URI
|
||
|
|
_to_uri_safe = ":/?#[]@!$&'()*+,;=%"
|
||
|
|
|
||
|
|
|
||
|
|
def iri_to_uri(
|
||
|
|
iri: t.Union[str, t.Tuple[str, str, str, str, str]],
|
||
|
|
charset: str = "utf-8",
|
||
|
|
errors: str = "strict",
|
||
|
|
safe_conversion: bool = False,
|
||
|
|
) -> str:
|
||
|
|
"""Convert an IRI to a URI. All non-ASCII and unsafe characters are
|
||
|
|
quoted. If the URL has a domain, it is encoded to Punycode.
|
||
|
|
|
||
|
|
>>> iri_to_uri('http://\\u2603.net/p\\xe5th?q=\\xe8ry%DF')
|
||
|
|
'http://xn--n3h.net/p%C3%A5th?q=%C3%A8ry%DF'
|
||
|
|
|
||
|
|
:param iri: The IRI to convert.
|
||
|
|
:param charset: The encoding of the IRI.
|
||
|
|
:param errors: Error handler to use during ``bytes.encode``.
|
||
|
|
:param safe_conversion: Return the URL unchanged if it only contains
|
||
|
|
ASCII characters and no whitespace. See the explanation below.
|
||
|
|
|
||
|
|
There is a general problem with IRI conversion with some protocols
|
||
|
|
that are in violation of the URI specification. Consider the
|
||
|
|
following two IRIs::
|
||
|
|
|
||
|
|
magnet:?xt=uri:whatever
|
||
|
|
itms-services://?action=download-manifest
|
||
|
|
|
||
|
|
After parsing, we don't know if the scheme requires the ``//``,
|
||
|
|
which is dropped if empty, but conveys different meanings in the
|
||
|
|
final URL if it's present or not. In this case, you can use
|
||
|
|
``safe_conversion``, which will return the URL unchanged if it only
|
||
|
|
contains ASCII characters and no whitespace. This can result in a
|
||
|
|
URI with unquoted characters if it was not already quoted correctly,
|
||
|
|
but preserves the URL's semantics. Werkzeug uses this for the
|
||
|
|
``Location`` header for redirects.
|
||
|
|
|
||
|
|
.. versionchanged:: 0.15
|
||
|
|
All reserved characters remain unquoted. Previously, only some
|
||
|
|
reserved characters were left unquoted.
|
||
|
|
|
||
|
|
.. versionchanged:: 0.9.6
|
||
|
|
The ``safe_conversion`` parameter was added.
|
||
|
|
|
||
|
|
.. versionadded:: 0.6
|
||
|
|
"""
|
||
|
|
if isinstance(iri, tuple):
|
||
|
|
iri = url_unparse(iri)
|
||
|
|
|
||
|
|
if safe_conversion:
|
||
|
|
# If we're not sure if it's safe to convert the URL, and it only
|
||
|
|
# contains ASCII characters, return it unconverted.
|
||
|
|
try:
|
||
|
|
native_iri = _to_str(iri)
|
||
|
|
ascii_iri = native_iri.encode("ascii")
|
||
|
|
|
||
|
|
# Only return if it doesn't have whitespace. (Why?)
|
||
|
|
if len(ascii_iri.split()) == 1:
|
||
|
|
return native_iri
|
||
|
|
except UnicodeError:
|
||
|
|
pass
|
||
|
|
|
||
|
|
iri = url_parse(_to_str(iri, charset, errors))
|
||
|
|
path = url_quote(iri.path, charset, errors, _to_uri_safe)
|
||
|
|
query = url_quote(iri.query, charset, errors, _to_uri_safe)
|
||
|
|
fragment = url_quote(iri.fragment, charset, errors, _to_uri_safe)
|
||
|
|
return url_unparse((iri.scheme, iri.encode_netloc(), path, query, fragment))
|
||
|
|
|
||
|
|
|
||
|
|
def url_decode(
|
||
|
|
s: t.AnyStr,
|
||
|
|
charset: str = "utf-8",
|
||
|
|
include_empty: bool = True,
|
||
|
|
errors: str = "replace",
|
||
|
|
separator: str = "&",
|
||
|
|
cls: t.Optional[t.Type["ds.MultiDict"]] = None,
|
||
|
|
) -> "ds.MultiDict[str, str]":
|
||
|
|
"""Parse a query string and return it as a :class:`MultiDict`.
|
||
|
|
|
||
|
|
:param s: The query string to parse.
|
||
|
|
:param charset: Decode bytes to string with this charset. If not
|
||
|
|
given, bytes are returned as-is.
|
||
|
|
:param include_empty: Include keys with empty values in the dict.
|
||
|
|
:param errors: Error handling behavior when decoding bytes.
|
||
|
|
:param separator: Separator character between pairs.
|
||
|
|
:param cls: Container to hold result instead of :class:`MultiDict`.
|
||
|
|
|
||
|
|
.. versionchanged:: 2.0
|
||
|
|
The ``decode_keys`` parameter is deprecated and will be removed
|
||
|
|
in Werkzeug 2.1.
|
||
|
|
|
||
|
|
.. versionchanged:: 0.5
|
||
|
|
In previous versions ";" and "&" could be used for url decoding.
|
||
|
|
Now only "&" is supported. If you want to use ";", a different
|
||
|
|
``separator`` can be provided.
|
||
|
|
|
||
|
|
.. versionchanged:: 0.5
|
||
|
|
The ``cls`` parameter was added.
|
||
|
|
"""
|
||
|
|
if cls is None:
|
||
|
|
from .datastructures import MultiDict # noqa: F811
|
||
|
|
|
||
|
|
cls = MultiDict
|
||
|
|
if isinstance(s, str) and not isinstance(separator, str):
|
||
|
|
separator = separator.decode(charset or "ascii")
|
||
|
|
elif isinstance(s, bytes) and not isinstance(separator, bytes):
|
||
|
|
separator = separator.encode(charset or "ascii") # type: ignore
|
||
|
|
return cls(
|
||
|
|
_url_decode_impl(
|
||
|
|
s.split(separator), charset, include_empty, errors # type: ignore
|
||
|
|
)
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
def url_decode_stream(
|
||
|
|
stream: t.IO[bytes],
|
||
|
|
charset: str = "utf-8",
|
||
|
|
include_empty: bool = True,
|
||
|
|
errors: str = "replace",
|
||
|
|
separator: bytes = b"&",
|
||
|
|
cls: t.Optional[t.Type["ds.MultiDict"]] = None,
|
||
|
|
limit: t.Optional[int] = None,
|
||
|
|
) -> "ds.MultiDict[str, str]":
|
||
|
|
"""Works like :func:`url_decode` but decodes a stream. The behavior
|
||
|
|
of stream and limit follows functions like
|
||
|
|
:func:`~werkzeug.wsgi.make_line_iter`. The generator of pairs is
|
||
|
|
directly fed to the `cls` so you can consume the data while it's
|
||
|
|
parsed.
|
||
|
|
|
||
|
|
:param stream: a stream with the encoded querystring
|
||
|
|
:param charset: the charset of the query string. If set to `None`
|
||
|
|
no decoding will take place.
|
||
|
|
:param include_empty: Set to `False` if you don't want empty values to
|
||
|
|
appear in the dict.
|
||
|
|
:param errors: the decoding error behavior.
|
||
|
|
:param separator: the pair separator to be used, defaults to ``&``
|
||
|
|
:param cls: an optional dict class to use. If this is not specified
|
||
|
|
or `None` the default :class:`MultiDict` is used.
|
||
|
|
:param limit: the content length of the URL data. Not necessary if
|
||
|
|
a limited stream is provided.
|
||
|
|
|
||
|
|
.. versionchanged:: 2.0
|
||
|
|
The ``decode_keys`` and ``return_iterator`` parameters are
|
||
|
|
deprecated and will be removed in Werkzeug 2.1.
|
||
|
|
|
||
|
|
.. versionadded:: 0.8
|
||
|
|
"""
|
||
|
|
from .wsgi import make_chunk_iter
|
||
|
|
|
||
|
|
pair_iter = make_chunk_iter(stream, separator, limit)
|
||
|
|
decoder = _url_decode_impl(pair_iter, charset, include_empty, errors)
|
||
|
|
|
||
|
|
if cls is None:
|
||
|
|
from .datastructures import MultiDict # noqa: F811
|
||
|
|
|
||
|
|
cls = MultiDict
|
||
|
|
|
||
|
|
return cls(decoder)
|
||
|
|
|
||
|
|
|
||
|
|
def _url_decode_impl(
|
||
|
|
pair_iter: t.Iterable[t.AnyStr], charset: str, include_empty: bool, errors: str
|
||
|
|
) -> t.Iterator[t.Tuple[str, str]]:
|
||
|
|
for pair in pair_iter:
|
||
|
|
if not pair:
|
||
|
|
continue
|
||
|
|
s = _make_encode_wrapper(pair)
|
||
|
|
equal = s("=")
|
||
|
|
if equal in pair:
|
||
|
|
key, value = pair.split(equal, 1)
|
||
|
|
else:
|
||
|
|
if not include_empty:
|
||
|
|
continue
|
||
|
|
key = pair
|
||
|
|
value = s("")
|
||
|
|
yield (
|
||
|
|
url_unquote_plus(key, charset, errors),
|
||
|
|
url_unquote_plus(value, charset, errors),
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
def url_encode(
|
||
|
|
obj: t.Union[t.Mapping[str, str], t.Iterable[t.Tuple[str, str]]],
|
||
|
|
charset: str = "utf-8",
|
||
|
|
sort: bool = False,
|
||
|
|
key: t.Optional[t.Callable[[t.Tuple[str, str]], t.Any]] = None,
|
||
|
|
separator: str = "&",
|
||
|
|
) -> str:
|
||
|
|
"""URL encode a dict/`MultiDict`. If a value is `None` it will not appear
|
||
|
|
in the result string. Per default only values are encoded into the target
|
||
|
|
charset strings.
|
||
|
|
|
||
|
|
:param obj: the object to encode into a query string.
|
||
|
|
:param charset: the charset of the query string.
|
||
|
|
:param sort: set to `True` if you want parameters to be sorted by `key`.
|
||
|
|
:param separator: the separator to be used for the pairs.
|
||
|
|
:param key: an optional function to be used for sorting. For more details
|
||
|
|
check out the :func:`sorted` documentation.
|
||
|
|
|
||
|
|
.. versionchanged:: 2.0
|
||
|
|
The ``encode_keys`` parameter is deprecated and will be removed
|
||
|
|
in Werkzeug 2.1.
|
||
|
|
|
||
|
|
.. versionchanged:: 0.5
|
||
|
|
Added the ``sort``, ``key``, and ``separator`` parameters.
|
||
|
|
"""
|
||
|
|
separator = _to_str(separator, "ascii")
|
||
|
|
return separator.join(_url_encode_impl(obj, charset, sort, key))
|
||
|
|
|
||
|
|
|
||
|
|
def url_encode_stream(
|
||
|
|
obj: t.Union[t.Mapping[str, str], t.Iterable[t.Tuple[str, str]]],
|
||
|
|
stream: t.Optional[t.IO[str]] = None,
|
||
|
|
charset: str = "utf-8",
|
||
|
|
sort: bool = False,
|
||
|
|
key: t.Optional[t.Callable[[t.Tuple[str, str]], t.Any]] = None,
|
||
|
|
separator: str = "&",
|
||
|
|
) -> None:
|
||
|
|
"""Like :meth:`url_encode` but writes the results to a stream
|
||
|
|
object. If the stream is `None` a generator over all encoded
|
||
|
|
pairs is returned.
|
||
|
|
|
||
|
|
:param obj: the object to encode into a query string.
|
||
|
|
:param stream: a stream to write the encoded object into or `None` if
|
||
|
|
an iterator over the encoded pairs should be returned. In
|
||
|
|
that case the separator argument is ignored.
|
||
|
|
:param charset: the charset of the query string.
|
||
|
|
:param sort: set to `True` if you want parameters to be sorted by `key`.
|
||
|
|
:param separator: the separator to be used for the pairs.
|
||
|
|
:param key: an optional function to be used for sorting. For more details
|
||
|
|
check out the :func:`sorted` documentation.
|
||
|
|
|
||
|
|
.. versionchanged:: 2.0
|
||
|
|
The ``encode_keys`` parameter is deprecated and will be removed
|
||
|
|
in Werkzeug 2.1.
|
||
|
|
|
||
|
|
.. versionadded:: 0.8
|
||
|
|
"""
|
||
|
|
separator = _to_str(separator, "ascii")
|
||
|
|
gen = _url_encode_impl(obj, charset, sort, key)
|
||
|
|
if stream is None:
|
||
|
|
return gen # type: ignore
|
||
|
|
for idx, chunk in enumerate(gen):
|
||
|
|
if idx:
|
||
|
|
stream.write(separator)
|
||
|
|
stream.write(chunk)
|
||
|
|
return None
|
||
|
|
|
||
|
|
|
||
|
|
def url_join(
|
||
|
|
base: t.Union[str, t.Tuple[str, str, str, str, str]],
|
||
|
|
url: t.Union[str, t.Tuple[str, str, str, str, str]],
|
||
|
|
allow_fragments: bool = True,
|
||
|
|
) -> str:
|
||
|
|
"""Join a base URL and a possibly relative URL to form an absolute
|
||
|
|
interpretation of the latter.
|
||
|
|
|
||
|
|
:param base: the base URL for the join operation.
|
||
|
|
:param url: the URL to join.
|
||
|
|
:param allow_fragments: indicates whether fragments should be allowed.
|
||
|
|
"""
|
||
|
|
if isinstance(base, tuple):
|
||
|
|
base = url_unparse(base)
|
||
|
|
if isinstance(url, tuple):
|
||
|
|
url = url_unparse(url)
|
||
|
|
|
||
|
|
_check_str_tuple((base, url))
|
||
|
|
s = _make_encode_wrapper(base)
|
||
|
|
|
||
|
|
if not base:
|
||
|
|
return url
|
||
|
|
if not url:
|
||
|
|
return base
|
||
|
|
|
||
|
|
bscheme, bnetloc, bpath, bquery, bfragment = url_parse(
|
||
|
|
base, allow_fragments=allow_fragments
|
||
|
|
)
|
||
|
|
scheme, netloc, path, query, fragment = url_parse(url, bscheme, allow_fragments)
|
||
|
|
if scheme != bscheme:
|
||
|
|
return url
|
||
|
|
if netloc:
|
||
|
|
return url_unparse((scheme, netloc, path, query, fragment))
|
||
|
|
netloc = bnetloc
|
||
|
|
|
||
|
|
if path[:1] == s("/"):
|
||
|
|
segments = path.split(s("/"))
|
||
|
|
elif not path:
|
||
|
|
segments = bpath.split(s("/"))
|
||
|
|
if not query:
|
||
|
|
query = bquery
|
||
|
|
else:
|
||
|
|
segments = bpath.split(s("/"))[:-1] + path.split(s("/"))
|
||
|
|
|
||
|
|
# If the rightmost part is "./" we want to keep the slash but
|
||
|
|
# remove the dot.
|
||
|
|
if segments[-1] == s("."):
|
||
|
|
segments[-1] = s("")
|
||
|
|
|
||
|
|
# Resolve ".." and "."
|
||
|
|
segments = [segment for segment in segments if segment != s(".")]
|
||
|
|
while True:
|
||
|
|
i = 1
|
||
|
|
n = len(segments) - 1
|
||
|
|
while i < n:
|
||
|
|
if segments[i] == s("..") and segments[i - 1] not in (s(""), s("..")):
|
||
|
|
del segments[i - 1 : i + 1]
|
||
|
|
break
|
||
|
|
i += 1
|
||
|
|
else:
|
||
|
|
break
|
||
|
|
|
||
|
|
# Remove trailing ".." if the URL is absolute
|
||
|
|
unwanted_marker = [s(""), s("..")]
|
||
|
|
while segments[:2] == unwanted_marker:
|
||
|
|
del segments[1]
|
||
|
|
|
||
|
|
path = s("/").join(segments)
|
||
|
|
return url_unparse((scheme, netloc, path, query, fragment))
|