diff options
Diffstat (limited to 'youtube_dl/extractor/youtube.py')
| -rw-r--r-- | youtube_dl/extractor/youtube.py | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/youtube_dl/extractor/youtube.py b/youtube_dl/extractor/youtube.py index 7f8c0c532..54073ef86 100644 --- a/youtube_dl/extractor/youtube.py +++ b/youtube_dl/extractor/youtube.py @@ -1652,7 +1652,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor): assert os.path.basename(func_id) == func_id self.write_debug('Extracting signature function {0}'.format(func_id)) - cache_spec, code = self.cache.load('youtube-sigfuncs', func_id), None + cache_spec, code = self.cache.load('youtube-sigfuncs', func_id, min_ver='2025.04.07'), None if not cache_spec: code = self._load_player(video_id, player_url, player_id) @@ -1813,6 +1813,10 @@ class YoutubeIE(YoutubeBaseInfoExtractor): return ret def _extract_n_function_name(self, jscode): + func_name, idx = None, None + # these special cases are redundant and probably obsolete (2025-04): + # they make the tests run ~10% faster without fallback warnings + r""" func_name, idx = self._search_regex( # (y=NuD(),Mw(k),q=k.Z[y]||null)&&(q=narray[idx](q),k.set(y,q),k.V||NuD(''))}}; # (R="nn"[+J.Z],mW(J),N=J.K[R]||null)&&(N=narray[idx](N),J.set(R,N))}}; @@ -1839,9 +1843,28 @@ class YoutubeIE(YoutubeBaseInfoExtractor): \(\s*[\w$]+\s*\) ''', jscode, 'Initial JS player n function name', group=('nfunc', 'idx'), default=(None, None)) + """ + + if not func_name: + # nfunc=function(x){...}|function nfunc(x); ... + # ... var y=[nfunc]|y[idx]=nfunc); + # obvious REs hang, so use a two-stage tactic + for m in re.finditer(r'''(?x) + [\n;]var\s(?:(?:(?!,).)+,|\s)*?(?!\d)[\w$]+(?:\[(?P<idx>\d+)\])?\s*=\s* + (?(idx)|\[\s*)(?P<nfunc>(?!\d)[\w$]+)(?(idx)|\s*\]) + \s*?[;\n] + ''', jscode): + func_name = self._search_regex( + r'[;,]\s*(function\s+)?({0})(?(1)|\s*=\s*function)\s*\((?!\d)[\w$]+\)\s*\{1}(?!\s*return\s)'.format( + re.escape(m.group('nfunc')), '{'), + jscode, 'Initial JS player n function name (2)', group=2, default=None) + if func_name: + idx = m.group('idx') + break + # thx bashonly: yt-dlp/yt-dlp/pull/10611 if not func_name: - self.report_warning('Falling back to generic n function search') + self.report_warning('Falling back to generic n function search', only_once=True) return self._search_regex( r'''(?xs) (?:(?<=[^\w$])|^) # instead of \b, which ignores $ @@ -1855,14 +1878,14 @@ class YoutubeIE(YoutubeBaseInfoExtractor): return func_name return self._search_json( - r'var\s+{0}\s*='.format(re.escape(func_name)), jscode, + r'(?<![\w-])var\s(?:(?:(?!,).)+,|\s)*?{0}\s*='.format(re.escape(func_name)), jscode, 'Initial JS player n function list ({0}.{1})'.format(func_name, idx), - func_name, contains_pattern=r'\[[\s\S]+\]', end_pattern='[,;]', + func_name, contains_pattern=r'\[.+\]', end_pattern='[,;]', transform_source=js_to_json)[int(idx)] def _extract_n_function_code(self, video_id, player_url): player_id = self._extract_player_info(player_url) - func_code = self.cache.load('youtube-nsig', player_id) + func_code = self.cache.load('youtube-nsig', player_id, min_ver='2025.04.07') jscode = func_code or self._load_player(video_id, player_url) jsi = JSInterpreter(jscode) |