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[extractor/generic] Avoid catastrophic backtracking in KVS regex

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Authored by: bashonly
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bashonly 2023-01-29 00:59:37 -06:00
parent 37e325b92f
commit 8aa0bd5d10
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1 changed files with 3 additions and 3 deletions
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yt_dlp/extractor/generic.py
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@ -2637,11 +2637,11 @@ def _extract_embeds(self, url, webpage, *, urlh=None, info_dict={}):
# Look for generic KVS player (before json-ld bc of some urls that break otherwise) # Look for generic KVS player (before json-ld bc of some urls that break otherwise)
found = self._search_regex(( found = self._search_regex((
r'<script\b[^>]+?\bsrc\s*=\s*(["\'])https?://(?:\S+?/)+kt_player\.js\?v=(?P<ver>\d+(?:\.\d+)+)\1[^>]*>', r'<script\b[^>]+?\bsrc\s*=\s*(["\'])https?://(?:(?!\1)[^?#])+/kt_player\.js\?v=(?P<ver>\d+(?:\.\d+)+)\1[^>]*>',
r'kt_player\s*\(\s*(["\'])(?:(?!\1)[\w\W])+\1\s*,\s*(["\'])https?://(?:\S+?/)+kt_player\.swf\?v=(?P<ver>\d+(?:\.\d+)+)\2\s*,', r'kt_player\s*\(\s*(["\'])(?:(?!\1)[\w\W])+\1\s*,\s*(["\'])https?://(?:(?!\2)[^?#])+/kt_player\.swf\?v=(?P<ver>\d+(?:\.\d+)+)\2\s*,',
), webpage, 'KVS player', group='ver', default=False) ), webpage, 'KVS player', group='ver', default=False)
if found: if found:
self.report_detected('KWS Player') self.report_detected('KVS Player')
if found.split('.')[0] not in ('4', '5', '6'): if found.split('.')[0] not in ('4', '5', '6'):
self.report_warning(f'Untested major version ({found}) in player engine - download may fail.') self.report_warning(f'Untested major version ({found}) in player engine - download may fail.')
return [self._extract_kvs(url, webpage, video_id)] return [self._extract_kvs(url, webpage, video_id)]