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[extractor/youtube] Add fallback to phantomjs

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Related #4635
This commit is contained in:
pukkandan 2022-08-18 21:35:18 +05:30
parent 587021cd9f
commit 25836db6be
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GPG Key ID: 7EEE9E1E817D0A39
1 changed files with 31 additions and 6 deletions
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31
yt_dlp/extractor/youtube.py
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@ -17,6 +17,7 @@
import urllib.parse
from .common import InfoExtractor, SearchInfoExtractor
from .openload import PhantomJSwrapper
from ..compat import functools
from ..jsinterp import JSInterpreter
from ..utils import (
@ -2624,8 +2625,23 @@ def _decrypt_nsig(self, s, video_id, player_url):
if self.get_param('youtube_print_sig_code'):
self.to_screen(f'Extracted nsig function from {player_id}:\n{func_code[1]}\n')
try:
extract_nsig = self._cached(self._extract_n_function_from_code, 'nsig func', player_url)
ret = extract_nsig(jsi, func_code)(s)
except JSInterpreter.Exception as e:
try:
jsi = PhantomJSwrapper(self)
except ExtractorError:
raise e
self.report_warning(
f'Native nsig extraction failed: Trying with PhantomJS\n'
f' n = {s} ; player = {player_url}', video_id)
self.write_debug(e)
args, func_body = func_code
ret = jsi.execute(
f'console.log(function({", ".join(args)}) {{ {func_body} }}({s!r}));',
video_id=video_id, note='Executing signature code').strip()
self.write_debug(f'Decrypted nsig {s} => {ret}')
return ret
@ -2655,9 +2671,15 @@ def _extract_n_function_from_code(self, jsi, func_code):
func = jsi.extract_function_from_code(*func_code)
def extract_nsig(s):
try:
ret = func([s])
except JSInterpreter.Exception:
raise
except Exception as e:
raise JSInterpreter.Exception(traceback.format_exc(), cause=e)
if ret.startswith('enhanced_except_'):
raise ExtractorError('Signature function returned an exception')
raise JSInterpreter.Exception('Signature function returned an exception')
return ret
return extract_nsig
@ -3240,9 +3262,12 @@ def _extract_formats_and_subtitles(self, streaming_data, video_id, player_url, i
'n': decrypt_nsig(query['n'][0], video_id, player_url)
})
except ExtractorError as e:
phantomjs_hint = ''
if isinstance(e, JSInterpreter.Exception):
phantomjs_hint = f' Install {self._downloader._format_err("PhantomJS", self._downloader.Styles.EMPHASIS)} to workaround the issue\n'
self.report_warning(
'nsig extraction failed: You may experience throttling for some formats\n'
f'n = {query["n"][0]} ; player = {player_url}', video_id=video_id, only_once=True)
f'nsig extraction failed: You may experience throttling for some formats\n{phantomjs_hint}'
f' n = {query["n"][0]} ; player = {player_url}', video_id=video_id, only_once=True)
self.write_debug(e, only_once=True)
throttled = True