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[extractor/youtube] Make signature extraction non-fatal 

and reduce verbosity of it's warning

Closes #3882
This commit is contained in:
pukkandan 2022-05-28 23:44:36 +05:30
parent 5bbe631e04
commit 52023f1291
No known key found for this signature in database
GPG Key ID: 7EEE9E1E817D0A39
1 changed files with 13 additions and 14 deletions
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27
yt_dlp/extractor/youtube.py
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@ -2530,22 +2530,16 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
def _decrypt_signature(self, s, video_id, player_url):
"""Turn the encrypted s field into a working signature"""
if player_url is None:
raise ExtractorError('Cannot decrypt signature without player_url')
try:
player_id = (player_url, self._signature_cache_id(s))
if player_id not in self._player_cache:
func = self._extract_signature_function(
video_id, player_url, s
)
func = self._extract_signature_function(video_id, player_url, s)
self._player_cache[player_id] = func
func = self._player_cache[player_id]
self._print_sig_code(func, s)
return func(s)
except Exception as e:
raise ExtractorError('Signature extraction failed: ' + traceback.format_exc(), cause=e)
raise ExtractorError(traceback.format_exc(), cause=e, video_id=video_id)
def _decrypt_nsig(self, s, video_id, player_url):
"""Turn the encrypted n field into a working signature"""
@ -3147,13 +3141,17 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
sc = compat_parse_qs(fmt.get('signatureCipher'))
fmt_url = url_or_none(try_get(sc, lambda x: x['url'][0]))
encrypted_sig = try_get(sc, lambda x: x['s'][0])
if not (sc and fmt_url and encrypted_sig):
if not all((sc, fmt_url, player_url, encrypted_sig)):
continue
if not player_url:
try:
fmt_url += '&%s=%s' % (
traverse_obj(sc, ('sp', -1)) or 'signature',
self._decrypt_signature(encrypted_sig, video_id, player_url)
)
except ExtractorError as e:
self.report_warning('Signature extraction failed: Some formats may be missing', only_once=True)
self.write_debug(e, only_once=True)
continue
signature = self._decrypt_signature(sc['s'][0], video_id, player_url)
sp = try_get(sc, lambda x: x['sp'][0]) or 'signature'
fmt_url += '&' + sp + '=' + signature
query = parse_qs(fmt_url)
throttled = False
@ -3164,7 +3162,8 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
except ExtractorError as e:
self.report_warning(
'nsig extraction failed: You may experience throttling for some formats\n'
f'n = {query["n"][0]} ; player = {player_url}\n{e}', only_once=True)
f'n = {query["n"][0]} ; player = {player_url}', only_once=True)
self.write_debug(e, only_once=True)
throttled = True
if itag: