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[YoutubeDL] Protect from infinite recursion due to recursively nested playlists (closes #27833)

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Sergey M․ 2021-01-16 01:46:41 +07:00
parent 9d50f86232
commit 9c9b458145
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1 changed files with 129 additions and 107 deletions
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68
youtube_dl/YoutubeDL.py
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@ -338,6 +338,8 @@ class YoutubeDL(object):
_pps = []
_download_retcode = None
_num_downloads = None
_playlist_level = 0
_playlist_urls = set()
_screen_file = None
def __init__(self, params=None, auto_init=True):
@ -906,8 +908,51 @@ class YoutubeDL(object):
return self.process_ie_result(
new_result, download=download, extra_info=extra_info)
elif result_type in ('playlist', 'multi_video'):
# Protect from infinite recursion due to recursively nested playlists
# (see https://github.com/ytdl-org/youtube-dl/issues/27833)
webpage_url = ie_result['webpage_url']
if webpage_url in self._playlist_urls:
self.to_screen(
'[download] Skipping already downloaded playlist: %s'
% ie_result.get('title') or ie_result.get('id'))
return
self._playlist_level += 1
self._playlist_urls.add(webpage_url)
try:
return self.__process_playlist(ie_result, download)
finally:
self._playlist_level -= 1
if not self._playlist_level:
self._playlist_urls.clear()
elif result_type == 'compat_list':
self.report_warning(
'Extractor %s returned a compat_list result. '
'It needs to be updated.' % ie_result.get('extractor'))
def _fixup(r):
self.add_extra_info(
r,
{
'extractor': ie_result['extractor'],
'webpage_url': ie_result['webpage_url'],
'webpage_url_basename': url_basename(ie_result['webpage_url']),
'extractor_key': ie_result['extractor_key'],
}
)
return r
ie_result['entries'] = [
self.process_ie_result(_fixup(r), download, extra_info)
for r in ie_result['entries']
]
return ie_result
else:
raise Exception('Invalid result type: %s' % result_type)
def __process_playlist(self, ie_result, download):
# We process each entry in the playlist
playlist = ie_result.get('title') or ie_result.get('id')
self.to_screen('[download] Downloading playlist: %s' % playlist)
playlist_results = []
@ -1015,29 +1060,6 @@ class YoutubeDL(object):
ie_result['entries'] = playlist_results
self.to_screen('[download] Finished downloading playlist: %s' % playlist)
return ie_result
elif result_type == 'compat_list':
self.report_warning(
'Extractor %s returned a compat_list result. '
'It needs to be updated.' % ie_result.get('extractor'))
def _fixup(r):
self.add_extra_info(
r,
{
'extractor': ie_result['extractor'],
'webpage_url': ie_result['webpage_url'],
'webpage_url_basename': url_basename(ie_result['webpage_url']),
'extractor_key': ie_result['extractor_key'],
}
)
return r
ie_result['entries'] = [
self.process_ie_result(_fixup(r), download, extra_info)
for r in ie_result['entries']
]
return ie_result
else:
raise Exception('Invalid result type: %s' % result_type)
@__handle_extraction_exceptions
def __process_iterable_entry(self, entry, download, extra_info):