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[extractor/youtube] Fallback regex for nsig code extraction
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@ -2661,7 +2661,10 @@ def _decrypt_nsig(self, s, video_id, player_url):
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raise ExtractorError('Cannot decrypt nsig without player_url')
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player_url = urljoin('https://www.youtube.com', player_url)
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jsi, player_id, func_code = self._extract_n_function_code(video_id, player_url)
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try:
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jsi, player_id, func_code = self._extract_n_function_code(video_id, player_url)
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except ExtractorError as e:
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raise ExtractorError('Unable to extract nsig function code', cause=e)
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if self.get_param('youtube_print_sig_code'):
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self.to_screen(f'Extracted nsig function from {player_id}:\n{func_code[1]}\n')
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@ -2706,7 +2709,20 @@ def _extract_n_function_code(self, video_id, player_url):
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if func_code:
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return jsi, player_id, func_code
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func_code = jsi.extract_function_code(self._extract_n_function_name(jscode))
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func_name = self._extract_n_function_name(jscode)
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# For redundancy
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func_code = self._search_regex(
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r'''(?xs)%s\s*=\s*function\s*\((?P<var>[\w$]+)\)\s*
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# NB: The end of the regex is intentionally kept strict
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{(?P<code>.+?}\s*return\ [\w$]+.join\(""\))};''' % func_name,
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jscode, 'nsig function', group=('var', 'code'), default=None)
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if func_code:
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func_code = ([func_code[0]], func_code[1])
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else:
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self.write_debug('Extracting nsig function with jsinterp')
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func_code = jsi.extract_function_code(func_name)
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self.cache.store('youtube-nsig', player_id, func_code)
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return jsi, player_id, func_code
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