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[Youtube] Rework n function extraction pattern
Now also succeeds with player b12cc44b
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1 changed files with 26 additions and 17 deletions
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@ -1661,23 +1661,33 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
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# new: (b=String.fromCharCode(110),c=a.get(b))&&c=nfunc[idx](c)
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# or: (b="nn"[+a.D],c=a.get(b))&&(c=nfunc[idx](c)
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# or: (PL(a),b=a.j.n||null)&&(b=nfunc[idx](b)
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# old: .get("n"))&&(b=nfunc[idx](b)
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# older: .get("n"))&&(b=nfunc(b)
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# or: (b="nn"[+a.D],vL(a),c=a.j[b]||null)&&(c=narray[idx](c),a.set(b,c),narray.length||nfunc("")
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# old: (b=a.get("n"))&&(b=nfunc[idx](b)(?P<c>[a-z])\s*=\s*[a-z]\s*
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# older: (b=a.get("n"))&&(b=nfunc(b)
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r'''(?x)
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(?:\((?:[\w$()\s]+,)*?\s*(?P<b>[a-z])\s*=\s*(?:
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String\s*\.\s*fromCharCode\s*\(\s*110\s*\)|
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"n+"\[\s*\+?s*[\w$.]+\s*]|
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(?P<b1>(?:[\w$]+\s*\.\s*)+n\b(?:(?!&&).)+\))
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)\s*
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(?(b1)
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&&\s*\(\s*(?P=b)|
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(?:
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,(?P<c>[a-z])\s*=\s*[a-z]\s*)?
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\.\s*get\s*\(\s*(?(b)(?P=b)|"n{1,2}")(?:\s*\)){2}\s*
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&&\s*\(\s*(?(c)(?P=c)|(?P=b))
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)
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)\s*=\s*
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(?P<nfunc>[a-zA-Z_$][\w$]*)(?:\s*\[(?P<idx>\d+)\])?\s*\(\s*[\w$]+\s*\)
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\((?:[\w$()\s]+,)*?\s* # (
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(?P<b>[a-z])\s*=\s* # b=
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(?:
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(?: # expect ,c=a.get(b) (etc)
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String\s*\.\s*fromCharCode\s*\(\s*110\s*\)|
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"n+"\[\s*\+?s*[\w$.]+\s*]
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)\s*(?:,[\w$()\s]+(?=,))*|
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(?P<old>[\w$]+) # a (old[er])
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)\s*
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(?(old)
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# b.get("n")
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(?:\.\s*[\w$]+\s*|\[\s*[\w$]+\s*]\s*)*?
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(?:\.\s*n|\[\s*"n"\s*]|\.\s*get\s*\(\s*"n"\s*\))
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| # ,c=a.get(b)
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,\s*(?P<c>[a-z])\s*=\s*[a-z]\s*
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(?:\.\s*[\w$]+\s*|\[\s*[\w$]+\s*]\s*)*?
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(?:\[\s*(?P=b)\s*]|\.\s*get\s*\(\s*(?P=b)\s*\))
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)
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# interstitial junk
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\s*(?:\|\|\s*null\s*)?(?:\)\s*)?&&\s*(?:\(\s*)?
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(?(c)(?P=c)|(?P=b))\s*=\s* # [c|b]=
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# nfunc|nfunc[idx]
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(?P<nfunc>[a-zA-Z_$][\w$]*)(?:\s*\[(?P<idx>\d+)\])?\s*\(\s*[\w$]+\s*\)
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''', jscode, 'Initial JS player n function name', group=('nfunc', 'idx'),
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default=(None, None))
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# thx bashonly: yt-dlp/yt-dlp/pull/10611
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@ -1690,7 +1700,6 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
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\s*\{(?:(?!};).)+?["']enhanced_except_
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''', jscode, 'Initial JS player n function name', group='name')
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if not idx:
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self.report_warning('Falling back to generic n function search')
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return func_name
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return self._parse_json(self._search_regex(
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