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Improve ytInitialPlayerResponse extraction

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Makes it work if there are additional javascripts statements
after the playerResponse variable

Signed-off-by: Jesús <heckyel@hyperbola.info>
This commit is contained in:
James Taylor 2020-12-16 19:23:39 -08:00 committed by Jesús
parent 8443063fc4
commit 5edcaa4f9d
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GPG Key ID: F6EE7BC59A315766
1 changed files with 10 additions and 2 deletions
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12
youtube/yt_data_extract/watch_extraction.py
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@ -595,7 +595,13 @@ def js_escape_replace(match):
# literal character. e.g., "\a" = "a"
return single_char_codes.get(escaped_sequence, escaped_sequence)
PLAYER_RESPONSE_RE = re.compile(r'<script[^>]*?>var ytInitialPlayerResponse = ({.*?});</script>')
# works but complicated and unsafe:
#PLAYER_RESPONSE_RE = re.compile(r'<script[^>]*?>[^<]*?var ytInitialPlayerResponse = ({(?:"(?:[^"\\]|\\.)*?"|[^"])+?});')
# Because there are sometimes additional statements after the json object
# so we just capture all of those until end of script and tell json decoder
# to ignore extra stuff after the json object
PLAYER_RESPONSE_RE = re.compile(r'<script[^>]*?>[^<]*?var ytInitialPlayerResponse = ({.*?)</script>')
INITIAL_DATA_RE = re.compile(r"<script[^>]*?>var ytInitialData = '(.+?[^\\])';")
BASE_JS_RE = re.compile(r'jsUrl":\s*"([\w\-\./]+?/base.js)"')
JS_STRING_ESCAPE_RE = re.compile(r'\\([^xu]|x..|u....)')
@ -610,7 +616,9 @@ def extract_watch_info_from_html(watch_html):
base_js_url = None
if player_response_match is not None:
player_response = json.loads(player_response_match.group(1))
decoder = json.JSONDecoder()
# this will make it ignore extra stuff after end of object
player_response = decoder.raw_decode(player_response_match.group(1))[0]
else:
return {'error': 'Could not find ytInitialPlayerResponse'}
player_response = None