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[ie/youtube] Fix n function name extraction for player 20dfca59 (#10611)

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Closes #10608
Authored by: bashonly
This commit is contained in:
bashonly
2024-07-31 16:19:30 -05:00
committed by GitHub
parent 7e3e4779ad
commit 011b4a04db
2 changed files with 24 additions and 6 deletions
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26
yt_dlp/extractor/youtube.py
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@@ -3174,18 +3174,32 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
return ret
def _extract_n_function_name(self, jscode):
# Examples (with placeholders nfunc, narray, idx):
# * .get("n"))&&(b=nfunc(b)
# * .get("n"))&&(b=narray[idx](b)
# * b=String.fromCharCode(110),c=a.get(b))&&c=narray[idx](c)
# * a.D&&(b="nn"[+a.D],c=a.get(b))&&(c=narray[idx](c),a.set(b,c),narray.length||nfunc("")
# * a.D&&(PL(a),b=a.j.n||null)&&(b=narray[0](b),a.set("n",b),narray.length||nfunc("")
funcname, idx = self._search_regex(
r'''(?x)
(?:
\.get\("n"\)\)&&\(b=|
(?:
b=String\.fromCharCode\(110\)|
([a-zA-Z0-9$.]+)&&\(b="nn"\[\+\1\]
),c=a\.get\(b\)\)&&\(c=
)
(?P<nfunc>[a-zA-Z0-9$]+)(?:\[(?P<idx>\d+)\])?\([a-zA-Z0-9]\)''',
jscode, 'Initial JS player n function name', group=('nfunc', 'idx'))
if not idx:
(?P<str_idx>[a-zA-Z0-9_$.]+)&&\(b="nn"\[\+(?P=str_idx)\]
),c=a\.get\(b\)\)&&\(c=|
\b(?P<var>[a-zA-Z0-9_$]+)=
)(?P<nfunc>[a-zA-Z0-9_$]+)(?:\[(?P<idx>\d+)\])?\([a-zA-Z]\)
(?(var),[a-zA-Z0-9_$]+\.set\("n"\,(?P=var)\),(?P=nfunc)\.length)''',
jscode, 'n function name', group=('nfunc', 'idx'), default=(None, None))
if not funcname:
self.report_warning('Falling back to generic n function search')
return self._search_regex(
r'''(?xs)
;\s*(?P<name>[a-zA-Z0-9_$]+)\s*=\s*function\([a-zA-Z0-9_$]+\)
\s*\{(?:(?!};).)+?["']enhanced_except_''',
jscode, 'Initial JS player n function name', group='name')
elif not idx:
return funcname
return json.loads(js_to_json(self._search_regex(