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https://github.com/ytdl-org/youtube-dl
synced 2025-05-30 09:32:40 +09:00
[YouTube] Cache signature timestamp from player JS
* if the YT webpage can't be loaded, getting the `sts` requires loading the player JS: this caches it * based on yt-dlp/yt-dlp#13047, thx bashonly
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dirkf
parent
ec75141bf0
commit
3a42f6ad37
@ -49,6 +49,7 @@ from ..utils import (
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parse_duration,
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parse_qs,
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qualities,
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remove_end,
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remove_start,
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smuggle_url,
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str_or_none,
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@ -1584,6 +1585,15 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
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'397': {'acodec': 'none', 'vcodec': 'av01.0.05M.08'},
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}
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_PLAYER_JS_VARIANT_MAP = (
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('main', 'player_ias.vflset/en_US/base.js'),
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('tce', 'player_ias_tce.vflset/en_US/base.js'),
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('tv', 'tv-player-ias.vflset/tv-player-ias.js'),
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('tv_es6', 'tv-player-es6.vflset/tv-player-es6.js'),
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('phone', 'player-plasma-ias-phone-en_US.vflset/base.js'),
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('tablet', 'player-plasma-ias-tablet-en_US.vflset/base.js'),
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)
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@classmethod
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def suitable(cls, url):
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if parse_qs(url).get('list', [None])[0]:
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@ -1631,36 +1641,83 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
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raise ExtractorError(
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'Cannot identify player %r' % (player_url,), cause=e)
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def _load_player(self, video_id, player_url, fatal=True, player_id=None):
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if not player_id:
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def _player_js_cache_key(self, player_url, extra_id=None, _cache={}):
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if player_url not in _cache:
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player_id = self._extract_player_info(player_url)
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if player_id not in self._code_cache:
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player_path = remove_start(
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compat_urllib_parse.urlparse(player_url).path,
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'/s/player/{0}/'.format(player_id))
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variant = next((k for k, v in self._PLAYER_JS_VARIANT_MAP
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if v == player_path), None)
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if not variant:
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variant = next(
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(k for k, v in self._PLAYER_JS_VARIANT_MAP
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if re.match(re.escape(v).replace('en_US', r'\w+') + '$', player_path)),
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None)
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if not variant:
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self.write_debug(
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'Unable to determine player JS variant\n'
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' player = {0}'.format(player_url), only_once=True)
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variant = re.sub(r'[^a-zA-Z0-9]', '_', remove_end(player_path, '.js'))
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_cache[player_url] = join_nonempty(player_id, variant)
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if extra_id:
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extra_id = '-'.join((_cache[player_url], extra_id))
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assert os.path.basename(extra_id) == extra_id
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return extra_id
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return _cache[player_url]
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def _load_player(self, video_id, player_url, fatal=True):
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player_js_key = self._player_js_cache_key(player_url)
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if player_js_key not in self._code_cache:
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code = self._download_webpage(
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player_url, video_id, fatal=fatal,
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note='Downloading player ' + player_id,
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errnote='Download of %s failed' % player_url)
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note='Downloading player {0}'.format(player_js_key),
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errnote='Download of {0} failed'.format(player_url))
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if code:
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self._code_cache[player_id] = code
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return self._code_cache[player_id] if fatal else self._code_cache.get(player_id)
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self._code_cache[player_js_key] = code
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return self._code_cache.get(player_js_key)
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def _load_player_data_from_cache(self, name, player_url, extra_id=None):
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cache_id = ('youtube-{0}'.format(name), self._player_js_cache_key(player_url, extra_id))
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data = self._player_cache.get(cache_id)
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if data:
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return data
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data = self.cache.load(*cache_id, min_ver='2025.04.07')
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if data:
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self._player_cache[cache_id] = data
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return data
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def _store_player_data_to_cache(self, name, player_url, data, extra_id=None):
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cache_id = ('youtube-{0}'.format(name), self._player_js_cache_key(player_url, extra_id))
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if cache_id not in self._player_cache:
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self.cache.store(cache_id[0], cache_id[1], data)
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self._player_cache[cache_id] = data
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def _extract_signature_function(self, video_id, player_url, example_sig):
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player_id = self._extract_player_info(player_url)
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# player_id = self._extract_player_info(player_url)
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# Read from filesystem cache
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func_id = 'js_{0}_{1}'.format(
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player_id, self._signature_cache_id(example_sig))
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assert os.path.basename(func_id) == func_id
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self.write_debug('Extracting signature function {0}'.format(func_id))
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cache_spec, code = self.cache.load('youtube-sigfuncs', func_id, min_ver='2025.04.07'), None
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extra_id = self._signature_cache_id(example_sig)
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self.write_debug('Extracting signature function {0}-{1}'.format(player_url, extra_id))
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cache_spec, code = self._load_player_data_from_cache(
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'sigfuncs', player_url, extra_id=extra_id, min_ver='2025.04.07'
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), None
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if not cache_spec:
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code = self._load_player(video_id, player_url, player_id)
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if code:
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res = self._parse_sig_js(code)
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test_string = ''.join(map(compat_chr, range(len(example_sig))))
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cache_spec = [ord(c) for c in res(test_string)]
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self.cache.store('youtube-sigfuncs', func_id, cache_spec)
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code = self._load_player(video_id, player_url)
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if code:
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res = self._parse_sig_js(code)
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test_string = ''.join(map(compat_chr, range(len(example_sig))))
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cache_spec = [ord(c) for c in res(test_string)]
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self._store_player_data_to_cache(
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'sigfuncs', player_url, cache_spec, extra_id=extra_id)
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else:
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self.report_warning(
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'Failed to compute signature function {0}-{1}'.format(
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player_url, extra_id))
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return lambda s: ''.join(s[i] for i in cache_spec)
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@ -1885,22 +1942,21 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
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def _extract_n_function_code(self, video_id, player_url):
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player_id = self._extract_player_info(player_url)
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func_code = self.cache.load('youtube-nsig', player_id, min_ver='2025.04.07')
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func_code = self._load_player_data_from_cache('nsig', player_url)
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jscode = func_code or self._load_player(video_id, player_url)
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jsi = JSInterpreter(jscode)
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if func_code:
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return jsi, player_id, func_code
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return self._extract_n_function_code_jsi(video_id, jsi, player_id)
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def _extract_n_function_code_jsi(self, video_id, jsi, player_id=None):
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return self._extract_n_function_code_jsi(video_id, jsi, player_id, player_url)
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def _extract_n_function_code_jsi(self, video_id, jsi, player_id=None, player_url=None):
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func_name = self._extract_n_function_name(jsi.code)
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func_code = self._extract_sig_fn(jsi, func_name)
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if player_id:
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self.cache.store('youtube-nsig', player_id, func_code)
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if player_url:
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self._store_player_data_to_cache('nsig', player_url, func_code)
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return jsi, player_id, func_code
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def _extract_n_function_from_code(self, jsi, func_code):
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@ -1944,18 +2000,28 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
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Required to tell API what sig/player version is in use.
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"""
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sts = traverse_obj(ytcfg, 'STS', expected_type=int)
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if not sts:
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# Attempt to extract from player
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if player_url is None:
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error_msg = 'Cannot extract signature timestamp without player_url.'
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if fatal:
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raise ExtractorError(error_msg)
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self.report_warning(error_msg)
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return
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code = self._load_player(video_id, player_url, fatal=fatal)
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sts = int_or_none(self._search_regex(
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r'(?:signatureTimestamp|sts)\s*:\s*(?P<sts>[0-9]{5})', code or '',
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'JS player signature timestamp', group='sts', fatal=fatal))
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if sts:
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return sts
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if not player_url:
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error_msg = 'Cannot extract signature timestamp without player url'
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if fatal:
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raise ExtractorError(error_msg)
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self.report_warning(error_msg)
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return None
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sts = self._load_player_data_from_cache('sts', player_url)
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if sts:
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return sts
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# Attempt to extract from player
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code = self._load_player(video_id, player_url, fatal=fatal)
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sts = int_or_none(self._search_regex(
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r'(?:signatureTimestamp|sts)\s*:\s*(?P<sts>[0-9]{5})', code or '',
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'JS player signature timestamp', group='sts', fatal=fatal))
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if sts:
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self._store_player_data_to_cache('sts', player_url, sts)
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return sts
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def _mark_watched(self, video_id, player_response):
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