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[YouTube] Fix KeyError QV in signature extraction failed

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* temporarily force missing global definition into sig JS
* improve test: thanks https://github.com/yt-dlp/yt-dlp/issues/7327#issuecomment-1595274615
* resolves #32314
This commit is contained in:
dirkf 2023-06-17 15:36:39 +01:00
parent d6433cbb2c
commit ae8ba2c319
2 changed files with 11 additions and 2 deletions
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6
youtube_dl/extractor/youtube.py
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@ -1569,8 +1569,12 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
r'\bc\s*&&\s*[a-zA-Z0-9]+\.set\([^,]+\s*,\s*\([^)]*\)\s*\(\s*(?P<sig>[a-zA-Z0-9$]+)\('),
jscode, 'Initial JS player signature function name', group='sig')
jsi = JSInterpreter(jscode)
# temporary (please) hack for player 6ed0d907 #32314
ah = 'var AH={LR:function(a,b){var c=a[0];a[0]=a[b%a.length];a[b%a.length]=c},QV:function(a){a.reverse()},pO:function(a,b){a.splice(0,b)}};'
jsi = JSInterpreter(ah + jscode)
initial_function = jsi.extract_function(funcname)
return lambda s: initial_function([s])
def _decrypt_signature(self, s, video_id, player_url):