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https://github.com/yt-dlp/yt-dlp.git
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[cookies] Parse cookies leniently (#4780)
Closes #4776, #3778 Authored by: Grub4K
This commit is contained in:
Simon Sawicki
GitHub
parent
5736d79172
commit
8817a80d3a
3 changed files with 244 additions and 1 deletions
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@ -3,6 +3,7 @@
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from yt_dlp import cookies
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from yt_dlp.cookies import (
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LenientSimpleCookie,
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LinuxChromeCookieDecryptor,
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MacChromeCookieDecryptor,
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WindowsChromeCookieDecryptor,
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@ -137,3 +138,148 @@ def test_safari_cookie_parsing(self):
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def test_pbkdf2_sha1(self):
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key = pbkdf2_sha1(b'peanuts', b' ' * 16, 1, 16)
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self.assertEqual(key, b'g\xe1\x8e\x0fQ\x1c\x9b\xf3\xc9`!\xaa\x90\xd9\xd34')
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class TestLenientSimpleCookie(unittest.TestCase):
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def _run_tests(self, *cases):
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for message, raw_cookie, expected in cases:
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cookie = LenientSimpleCookie(raw_cookie)
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with self.subTest(message, expected=expected):
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self.assertEqual(cookie.keys(), expected.keys(), message)
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for key, expected_value in expected.items():
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morsel = cookie[key]
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if isinstance(expected_value, tuple):
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expected_value, expected_attributes = expected_value
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else:
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expected_attributes = {}
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attributes = {
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key: value
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for key, value in dict(morsel).items()
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if value != ""
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}
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self.assertEqual(attributes, expected_attributes, message)
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self.assertEqual(morsel.value, expected_value, message)
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def test_parsing(self):
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self._run_tests(
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# Copied from https://github.com/python/cpython/blob/v3.10.7/Lib/test/test_http_cookies.py
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(
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"Test basic cookie",
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"chips=ahoy; vienna=finger",
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{"chips": "ahoy", "vienna": "finger"},
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),
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(
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"Test quoted cookie",
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'keebler="E=mc2; L=\\"Loves\\"; fudge=\\012;"',
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{"keebler": 'E=mc2; L="Loves"; fudge=\012;'},
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),
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(
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"Allow '=' in an unquoted value",
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"keebler=E=mc2",
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{"keebler": "E=mc2"},
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),
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(
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"Allow cookies with ':' in their name",
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"key:term=value:term",
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{"key:term": "value:term"},
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),
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(
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"Allow '[' and ']' in cookie values",
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"a=b; c=[; d=r; f=h",
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{"a": "b", "c": "[", "d": "r", "f": "h"},
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),
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(
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"Test basic cookie attributes",
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'Customer="WILE_E_COYOTE"; Version=1; Path=/acme',
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{"Customer": ("WILE_E_COYOTE", {"version": "1", "path": "/acme"})},
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),
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(
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"Test flag only cookie attributes",
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'Customer="WILE_E_COYOTE"; HttpOnly; Secure',
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{"Customer": ("WILE_E_COYOTE", {"httponly": True, "secure": True})},
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),
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(
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"Test flag only attribute with values",
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"eggs=scrambled; httponly=foo; secure=bar; Path=/bacon",
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{"eggs": ("scrambled", {"httponly": "foo", "secure": "bar", "path": "/bacon"})},
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),
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(
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"Test special case for 'expires' attribute, 4 digit year",
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'Customer="W"; expires=Wed, 01 Jan 2010 00:00:00 GMT',
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{"Customer": ("W", {"expires": "Wed, 01 Jan 2010 00:00:00 GMT"})},
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),
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(
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"Test special case for 'expires' attribute, 2 digit year",
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'Customer="W"; expires=Wed, 01 Jan 98 00:00:00 GMT',
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{"Customer": ("W", {"expires": "Wed, 01 Jan 98 00:00:00 GMT"})},
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),
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(
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"Test extra spaces in keys and values",
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"eggs = scrambled ; secure ; path = bar ; foo=foo ",
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{"eggs": ("scrambled", {"secure": True, "path": "bar"}), "foo": "foo"},
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),
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(
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"Test quoted attributes",
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'Customer="WILE_E_COYOTE"; Version="1"; Path="/acme"',
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{"Customer": ("WILE_E_COYOTE", {"version": "1", "path": "/acme"})}
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),
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# Our own tests that CPython passes
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(
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"Allow ';' in quoted value",
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'chips="a;hoy"; vienna=finger',
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{"chips": "a;hoy", "vienna": "finger"},
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),
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(
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"Keep only the last set value",
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"a=c; a=b",
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{"a": "b"},
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),
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)
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def test_lenient_parsing(self):
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self._run_tests(
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(
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"Ignore and try to skip invalid cookies",
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'chips={"ahoy;": 1}; vienna="finger;"',
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{"vienna": "finger;"},
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),
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(
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"Ignore cookies without a name",
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"a=b; unnamed; c=d",
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{"a": "b", "c": "d"},
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),
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(
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"Ignore '\"' cookie without name",
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'a=b; "; c=d',
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{"a": "b", "c": "d"},
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),
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(
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"Skip all space separated values",
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"x a=b c=d x; e=f",
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{"a": "b", "c": "d", "e": "f"},
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),
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(
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"Skip all space separated values",
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'x a=b; data={"complex": "json", "with": "key=value"}; x c=d x',
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{"a": "b", "c": "d"},
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),
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(
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"Expect quote mending",
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'a=b; invalid="; c=d',
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{"a": "b", "c": "d"},
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),
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(
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"Reset morsel after invalid to not capture attributes",
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"a=b; invalid; Version=1; c=d",
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{"a": "b", "c": "d"},
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),
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(
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"Continue after non-flag attribute without value",
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"a=b; path; Version=1; c=d",
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{"a": "b", "c": "d"},
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),
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)
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@ -1,6 +1,7 @@
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import base64
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import contextlib
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import http.cookiejar
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import http.cookies
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import json
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import os
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import re
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@ -990,3 +991,98 @@ def _parse_browser_specification(browser_name, profile=None, keyring=None, conta
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if profile is not None and _is_path(profile):
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profile = os.path.expanduser(profile)
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return browser_name, profile, keyring, container
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class LenientSimpleCookie(http.cookies.SimpleCookie):
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"""More lenient version of http.cookies.SimpleCookie"""
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# From https://github.com/python/cpython/blob/v3.10.7/Lib/http/cookies.py
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_LEGAL_KEY_CHARS = r"\w\d!#%&'~_`><@,:/\$\*\+\-\.\^\|\)\(\?\}\{\="
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_LEGAL_VALUE_CHARS = _LEGAL_KEY_CHARS + r"\[\]"
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_RESERVED = {
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"expires",
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"path",
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"comment",
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"domain",
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"max-age",
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"secure",
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"httponly",
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"version",
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"samesite",
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}
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_FLAGS = {"secure", "httponly"}
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# Added 'bad' group to catch the remaining value
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_COOKIE_PATTERN = re.compile(r"""
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\s* # Optional whitespace at start of cookie
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(?P<key> # Start of group 'key'
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[""" + _LEGAL_KEY_CHARS + r"""]+?# Any word of at least one letter
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) # End of group 'key'
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( # Optional group: there may not be a value.
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\s*=\s* # Equal Sign
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( # Start of potential value
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(?P<val> # Start of group 'val'
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"(?:[^\\"]|\\.)*" # Any doublequoted string
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| # or
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\w{3},\s[\w\d\s-]{9,11}\s[\d:]{8}\sGMT # Special case for "expires" attr
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| # or
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[""" + _LEGAL_VALUE_CHARS + r"""]* # Any word or empty string
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) # End of group 'val'
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| # or
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(?P<bad>(?:\\;|[^;])*?) # 'bad' group fallback for invalid values
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) # End of potential value
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)? # End of optional value group
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\s* # Any number of spaces.
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(\s+|;|$) # Ending either at space, semicolon, or EOS.
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""", re.ASCII | re.VERBOSE)
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def load(self, data):
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# Workaround for https://github.com/yt-dlp/yt-dlp/issues/4776
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if not isinstance(data, str):
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return super().load(data)
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morsel = None
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index = 0
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length = len(data)
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while 0 <= index < length:
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match = self._COOKIE_PATTERN.search(data, index)
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if not match:
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break
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index = match.end(0)
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if match.group("bad"):
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morsel = None
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continue
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key, value = match.group("key", "val")
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if key[0] == "$":
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if morsel is not None:
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morsel[key[1:]] = True
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continue
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lower_key = key.lower()
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if lower_key in self._RESERVED:
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if morsel is None:
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continue
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if value is None:
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if lower_key not in self._FLAGS:
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morsel = None
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continue
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value = True
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else:
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value, _ = self.value_decode(value)
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morsel[key] = value
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elif value is not None:
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morsel = self.get(key, http.cookies.Morsel())
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real_value, coded_value = self.value_decode(value)
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morsel.set(key, real_value, coded_value)
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self[key] = morsel
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else:
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morsel = None
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@ -22,6 +22,7 @@
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from ..compat import functools # isort: split
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from ..compat import compat_etree_fromstring, compat_expanduser, compat_os_name
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from ..cookies import LenientSimpleCookie
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from ..downloader import FileDownloader
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from ..downloader.f4m import get_base_url, remove_encrypted_media
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from ..utils import (
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@ -3632,7 +3633,7 @@ def _set_cookie(self, domain, name, value, expire_time=None, port=None,
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def _get_cookies(self, url):
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""" Return a http.cookies.SimpleCookie with the cookies for the url """
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return http.cookies.SimpleCookie(self._downloader._calc_cookies(url))
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return LenientSimpleCookie(self._downloader._calc_cookies(url))
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def _apply_first_set_cookie_header(self, url_handle, cookie):
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"""
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