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[Youtube] Fix nsig extraction for player 20dfca59 (#32891)
* dirkf's patch for nsig extraction * add generic search per yt-dlp/yt-dlp/pull/10611 - thx bashonly --------- Co-authored-by: dirkf <fieldhouse@gmx.net>
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2 changed files with 30 additions and 6 deletions
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@ -174,6 +174,10 @@ _NSIG_TESTS = [
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'https://www.youtube.com/s/player/5604538d/player_ias.vflset/en_US/base.js',
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'7X-he4jjvMx7BCX', 'sViSydX8IHtdWA',
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),
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(
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'https://www.youtube.com/s/player/20dfca59/player_ias.vflset/en_US/base.js',
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'-fLCxedkAk4LUTK2', 'O8kfRq1y1eyHGw',
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),
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]
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@ -1659,18 +1659,38 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
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def _extract_n_function_name(self, jscode):
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func_name, idx = self._search_regex(
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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)s
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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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r'''(?x)
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(?:\(\s*(?P<b>[a-z])\s*=\s*(?:
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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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)\s*,(?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*&&\s*\(\s*(?(c)(?P=c)|b)\s*=\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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''', jscode, 'Initial JS player n function name', group=('nfunc', 'idx'))
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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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if not func_name:
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self.report_warning('Falling back to generic n function search')
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return self._search_regex(
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r'''(?xs)
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(?:(?<=[^\w$])|^) # instead of \b, which ignores $
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(?P<name>(?!\d)[a-zA-Z\d_$]+)\s*=\s*function\((?!\d)[a-zA-Z\d_$]+\)
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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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