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https://github.com/ytdl-org/youtube-dl
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[YoutubeDL] Protect from infinite recursion due to recursively nested playlists (closes #27833)
This commit is contained in:
Sergey M․
parent
9d50f86232
commit
9c9b458145
@ -338,6 +338,8 @@ class YoutubeDL(object):
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_pps = []
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_download_retcode = None
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_num_downloads = None
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_playlist_level = 0
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_playlist_urls = set()
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_screen_file = None
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def __init__(self, params=None, auto_init=True):
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@ -906,115 +908,23 @@ class YoutubeDL(object):
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return self.process_ie_result(
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new_result, download=download, extra_info=extra_info)
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elif result_type in ('playlist', 'multi_video'):
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# We process each entry in the playlist
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playlist = ie_result.get('title') or ie_result.get('id')
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self.to_screen('[download] Downloading playlist: %s' % playlist)
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playlist_results = []
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playliststart = self.params.get('playliststart', 1) - 1
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playlistend = self.params.get('playlistend')
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# For backwards compatibility, interpret -1 as whole list
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if playlistend == -1:
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playlistend = None
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playlistitems_str = self.params.get('playlist_items')
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playlistitems = None
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if playlistitems_str is not None:
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def iter_playlistitems(format):
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for string_segment in format.split(','):
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if '-' in string_segment:
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start, end = string_segment.split('-')
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for item in range(int(start), int(end) + 1):
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yield int(item)
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else:
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yield int(string_segment)
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playlistitems = orderedSet(iter_playlistitems(playlistitems_str))
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ie_entries = ie_result['entries']
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def make_playlistitems_entries(list_ie_entries):
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num_entries = len(list_ie_entries)
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return [
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list_ie_entries[i - 1] for i in playlistitems
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if -num_entries <= i - 1 < num_entries]
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def report_download(num_entries):
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# Protect from infinite recursion due to recursively nested playlists
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# (see https://github.com/ytdl-org/youtube-dl/issues/27833)
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webpage_url = ie_result['webpage_url']
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if webpage_url in self._playlist_urls:
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self.to_screen(
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'[%s] playlist %s: Downloading %d videos' %
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(ie_result['extractor'], playlist, num_entries))
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'[download] Skipping already downloaded playlist: %s'
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% ie_result.get('title') or ie_result.get('id'))
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return
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if isinstance(ie_entries, list):
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n_all_entries = len(ie_entries)
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if playlistitems:
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entries = make_playlistitems_entries(ie_entries)
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else:
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entries = ie_entries[playliststart:playlistend]
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n_entries = len(entries)
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self.to_screen(
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'[%s] playlist %s: Collected %d video ids (downloading %d of them)' %
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(ie_result['extractor'], playlist, n_all_entries, n_entries))
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elif isinstance(ie_entries, PagedList):
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if playlistitems:
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entries = []
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for item in playlistitems:
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entries.extend(ie_entries.getslice(
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item - 1, item
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))
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else:
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entries = ie_entries.getslice(
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playliststart, playlistend)
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n_entries = len(entries)
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report_download(n_entries)
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else: # iterable
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if playlistitems:
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entries = make_playlistitems_entries(list(itertools.islice(
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ie_entries, 0, max(playlistitems))))
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else:
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entries = list(itertools.islice(
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ie_entries, playliststart, playlistend))
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n_entries = len(entries)
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report_download(n_entries)
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if self.params.get('playlistreverse', False):
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entries = entries[::-1]
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if self.params.get('playlistrandom', False):
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random.shuffle(entries)
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x_forwarded_for = ie_result.get('__x_forwarded_for_ip')
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for i, entry in enumerate(entries, 1):
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self.to_screen('[download] Downloading video %s of %s' % (i, n_entries))
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# This __x_forwarded_for_ip thing is a bit ugly but requires
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# minimal changes
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if x_forwarded_for:
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entry['__x_forwarded_for_ip'] = x_forwarded_for
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extra = {
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'n_entries': n_entries,
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'playlist': playlist,
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'playlist_id': ie_result.get('id'),
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'playlist_title': ie_result.get('title'),
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'playlist_uploader': ie_result.get('uploader'),
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'playlist_uploader_id': ie_result.get('uploader_id'),
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'playlist_index': playlistitems[i - 1] if playlistitems else i + playliststart,
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'extractor': ie_result['extractor'],
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'webpage_url': ie_result['webpage_url'],
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'webpage_url_basename': url_basename(ie_result['webpage_url']),
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'extractor_key': ie_result['extractor_key'],
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}
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reason = self._match_entry(entry, incomplete=True)
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if reason is not None:
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self.to_screen('[download] ' + reason)
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continue
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entry_result = self.__process_iterable_entry(entry, download, extra)
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# TODO: skip failed (empty) entries?
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playlist_results.append(entry_result)
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ie_result['entries'] = playlist_results
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self.to_screen('[download] Finished downloading playlist: %s' % playlist)
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return ie_result
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self._playlist_level += 1
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self._playlist_urls.add(webpage_url)
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try:
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return self.__process_playlist(ie_result, download)
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finally:
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self._playlist_level -= 1
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if not self._playlist_level:
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self._playlist_urls.clear()
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elif result_type == 'compat_list':
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self.report_warning(
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'Extractor %s returned a compat_list result. '
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@ -1039,6 +949,118 @@ class YoutubeDL(object):
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else:
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raise Exception('Invalid result type: %s' % result_type)
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def __process_playlist(self, ie_result, download):
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# We process each entry in the playlist
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playlist = ie_result.get('title') or ie_result.get('id')
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self.to_screen('[download] Downloading playlist: %s' % playlist)
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playlist_results = []
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playliststart = self.params.get('playliststart', 1) - 1
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playlistend = self.params.get('playlistend')
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# For backwards compatibility, interpret -1 as whole list
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if playlistend == -1:
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playlistend = None
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playlistitems_str = self.params.get('playlist_items')
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playlistitems = None
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if playlistitems_str is not None:
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def iter_playlistitems(format):
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for string_segment in format.split(','):
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if '-' in string_segment:
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start, end = string_segment.split('-')
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for item in range(int(start), int(end) + 1):
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yield int(item)
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else:
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yield int(string_segment)
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playlistitems = orderedSet(iter_playlistitems(playlistitems_str))
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ie_entries = ie_result['entries']
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def make_playlistitems_entries(list_ie_entries):
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num_entries = len(list_ie_entries)
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return [
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list_ie_entries[i - 1] for i in playlistitems
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if -num_entries <= i - 1 < num_entries]
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def report_download(num_entries):
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self.to_screen(
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'[%s] playlist %s: Downloading %d videos' %
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(ie_result['extractor'], playlist, num_entries))
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if isinstance(ie_entries, list):
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n_all_entries = len(ie_entries)
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if playlistitems:
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entries = make_playlistitems_entries(ie_entries)
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else:
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entries = ie_entries[playliststart:playlistend]
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n_entries = len(entries)
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self.to_screen(
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'[%s] playlist %s: Collected %d video ids (downloading %d of them)' %
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(ie_result['extractor'], playlist, n_all_entries, n_entries))
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elif isinstance(ie_entries, PagedList):
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if playlistitems:
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entries = []
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for item in playlistitems:
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entries.extend(ie_entries.getslice(
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item - 1, item
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))
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else:
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entries = ie_entries.getslice(
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playliststart, playlistend)
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n_entries = len(entries)
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report_download(n_entries)
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else: # iterable
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if playlistitems:
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entries = make_playlistitems_entries(list(itertools.islice(
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ie_entries, 0, max(playlistitems))))
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else:
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entries = list(itertools.islice(
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ie_entries, playliststart, playlistend))
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n_entries = len(entries)
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report_download(n_entries)
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if self.params.get('playlistreverse', False):
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entries = entries[::-1]
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if self.params.get('playlistrandom', False):
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random.shuffle(entries)
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x_forwarded_for = ie_result.get('__x_forwarded_for_ip')
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for i, entry in enumerate(entries, 1):
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self.to_screen('[download] Downloading video %s of %s' % (i, n_entries))
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# This __x_forwarded_for_ip thing is a bit ugly but requires
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# minimal changes
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if x_forwarded_for:
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entry['__x_forwarded_for_ip'] = x_forwarded_for
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extra = {
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'n_entries': n_entries,
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'playlist': playlist,
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'playlist_id': ie_result.get('id'),
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'playlist_title': ie_result.get('title'),
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'playlist_uploader': ie_result.get('uploader'),
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'playlist_uploader_id': ie_result.get('uploader_id'),
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'playlist_index': playlistitems[i - 1] if playlistitems else i + playliststart,
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'extractor': ie_result['extractor'],
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'webpage_url': ie_result['webpage_url'],
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'webpage_url_basename': url_basename(ie_result['webpage_url']),
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'extractor_key': ie_result['extractor_key'],
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}
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reason = self._match_entry(entry, incomplete=True)
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if reason is not None:
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self.to_screen('[download] ' + reason)
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continue
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entry_result = self.__process_iterable_entry(entry, download, extra)
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# TODO: skip failed (empty) entries?
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playlist_results.append(entry_result)
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ie_result['entries'] = playlist_results
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self.to_screen('[download] Finished downloading playlist: %s' % playlist)
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return ie_result
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@__handle_extraction_exceptions
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def __process_iterable_entry(self, entry, download, extra_info):
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return self.process_ie_result(
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