[Youtube] Rewrite comment extraction (#167)
Closes #121 TODO: * Add an option for the user to specify newest/popular and max number of comments * Refactor the download code and generalize with TabIE * Parse time_text to timestamp
This commit is contained in:
Matthew
GitHub
parent
ca87974543
commit
a1c5d2ca64
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@ -264,6 +264,7 @@ class InfoExtractor(object):
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properties (all but one of text or html optional):
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* "author" - human-readable name of the comment author
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* "author_id" - user ID of the comment author
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* "author_thumbnail" - The thumbnail of the comment author
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* "id" - Comment ID
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* "html" - Comment as HTML
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* "text" - Plain text of the comment
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@ -271,6 +272,12 @@ class InfoExtractor(object):
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* "parent" - ID of the comment this one is replying to.
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Set to "root" to indicate that this is a
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comment to the original video.
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* "like_count" - Number of positive ratings of the comment
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* "dislike_count" - Number of negative ratings of the comment
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* "is_favorited" - Whether the comment is marked as
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favorite by the video uploader
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* "author_is_uploader" - Whether the comment is made by
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the video uploader
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age_limit: Age restriction for the video, as an integer (years)
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webpage_url: The URL to the video webpage, if given to yt-dlp it
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should allow to get the same result again. (It will be set
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@ -272,15 +272,21 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
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if not self._login():
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return
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_YT_WEB_CLIENT_VERSION = '2.20210301.08.00'
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_DEFAULT_API_DATA = {
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'context': {
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'client': {
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'clientName': 'WEB',
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'clientVersion': '2.20210301.08.00',
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'clientVersion': _YT_WEB_CLIENT_VERSION,
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}
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},
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}
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_DEFAULT_BASIC_API_HEADERS = {
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'X-YouTube-Client-Name': '1',
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'X-YouTube-Client-Version': _YT_WEB_CLIENT_VERSION
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}
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_YT_INITIAL_DATA_RE = r'(?:window\s*\[\s*["\']ytInitialData["\']\s*\]|ytInitialData)\s*=\s*({.+?})\s*;'
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_YT_INITIAL_PLAYER_RESPONSE_RE = r'ytInitialPlayerResponse\s*=\s*({.+?})\s*;'
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_YT_INITIAL_BOUNDARY_RE = r'(?:var\s+meta|</script|\n)'
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@ -315,6 +321,27 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
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self._YT_INITIAL_DATA_RE), webpage, 'yt initial data'),
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video_id)
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def _extract_identity_token(self, webpage, item_id):
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ytcfg = self._extract_ytcfg(item_id, webpage)
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if ytcfg:
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token = try_get(ytcfg, lambda x: x['ID_TOKEN'], compat_str)
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if token:
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return token
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return self._search_regex(
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r'\bID_TOKEN["\']\s*:\s*["\'](.+?)["\']', webpage,
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'identity token', default=None)
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@staticmethod
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def _extract_account_syncid(data):
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"""Extract syncId required to download private playlists of secondary channels"""
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sync_ids = (
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try_get(data, lambda x: x['responseContext']['mainAppWebResponseContext']['datasyncId'], compat_str)
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or '').split("||")
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if len(sync_ids) >= 2 and sync_ids[1]:
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# datasyncid is of the form "channel_syncid||user_syncid" for secondary channel
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# and just "user_syncid||" for primary channel. We only want the channel_syncid
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return sync_ids[0]
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def _extract_ytcfg(self, video_id, webpage):
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return self._parse_json(
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self._search_regex(
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@ -1462,6 +1489,270 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
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(r'%s\s*%s' % (regex, self._YT_INITIAL_BOUNDARY_RE),
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regex), webpage, name, default='{}'), video_id, fatal=False)
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@staticmethod
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def _join_text_entries(runs):
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text = None
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for run in runs:
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if not isinstance(run, dict):
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continue
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sub_text = try_get(run, lambda x: x['text'], compat_str)
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if sub_text:
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if not text:
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text = sub_text
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continue
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text += sub_text
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return text
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def _extract_comment(self, comment_renderer, parent=None):
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comment_id = comment_renderer.get('commentId')
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if not comment_id:
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return
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comment_text_runs = try_get(comment_renderer, lambda x: x['contentText']['runs']) or []
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text = self._join_text_entries(comment_text_runs) or ''
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comment_time_text = try_get(comment_renderer, lambda x: x['publishedTimeText']['runs']) or []
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time_text = self._join_text_entries(comment_time_text)
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author = try_get(comment_renderer, lambda x: x['authorText']['simpleText'], compat_str)
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author_id = try_get(comment_renderer,
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lambda x: x['authorEndpoint']['browseEndpoint']['browseId'], compat_str)
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votes = str_to_int(try_get(comment_renderer, (lambda x: x['voteCount']['simpleText'],
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lambda x: x['likeCount']), compat_str)) or 0
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author_thumbnail = try_get(comment_renderer,
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lambda x: x['authorThumbnail']['thumbnails'][-1]['url'], compat_str)
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author_is_uploader = try_get(comment_renderer, lambda x: x['authorIsChannelOwner'], bool)
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is_liked = try_get(comment_renderer, lambda x: x['isLiked'], bool)
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return {
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'id': comment_id,
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'text': text,
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# TODO: This should be parsed to timestamp
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'time_text': time_text,
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'like_count': votes,
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'is_favorited': is_liked,
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'author': author,
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'author_id': author_id,
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'author_thumbnail': author_thumbnail,
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'author_is_uploader': author_is_uploader,
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'parent': parent or 'root'
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}
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def _comment_entries(self, root_continuation_data, identity_token, account_syncid,
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session_token_list, parent=None, comment_counts=None):
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def extract_thread(parent_renderer):
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contents = try_get(parent_renderer, lambda x: x['contents'], list) or []
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if not parent:
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comment_counts[2] = 0
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for content in contents:
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comment_thread_renderer = try_get(content, lambda x: x['commentThreadRenderer'])
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comment_renderer = try_get(
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comment_thread_renderer, (lambda x: x['comment']['commentRenderer'], dict)) or try_get(
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content, (lambda x: x['commentRenderer'], dict))
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if not comment_renderer:
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continue
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comment = self._extract_comment(comment_renderer, parent)
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if not comment:
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continue
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comment_counts[0] += 1
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yield comment
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# Attempt to get the replies
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comment_replies_renderer = try_get(
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comment_thread_renderer, lambda x: x['replies']['commentRepliesRenderer'], dict)
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if comment_replies_renderer:
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comment_counts[2] += 1
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comment_entries_iter = self._comment_entries(
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comment_replies_renderer, identity_token, account_syncid,
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parent=comment.get('id'), session_token_list=session_token_list,
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comment_counts=comment_counts)
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for reply_comment in comment_entries_iter:
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yield reply_comment
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if not comment_counts:
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# comment so far, est. total comments, current comment thread #
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comment_counts = [0, 0, 0]
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headers = self._DEFAULT_BASIC_API_HEADERS.copy()
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# TODO: Generalize the download code with TabIE
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if identity_token:
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headers['x-youtube-identity-token'] = identity_token
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if account_syncid:
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headers['X-Goog-PageId'] = account_syncid
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headers['X-Goog-AuthUser'] = 0
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continuation = YoutubeTabIE._extract_continuation(root_continuation_data) # TODO
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first_continuation = False
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if parent is None:
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first_continuation = True
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for page_num in itertools.count(0):
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if not continuation:
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break
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retries = self._downloader.params.get('extractor_retries', 3)
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count = -1
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last_error = None
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while count < retries:
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count += 1
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if last_error:
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self.report_warning('%s. Retrying ...' % last_error)
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try:
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query = {
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'ctoken': continuation['ctoken'],
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'pbj': 1,
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'type': 'next',
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}
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if parent:
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query['action_get_comment_replies'] = 1
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else:
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query['action_get_comments'] = 1
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comment_prog_str = '(%d/%d)' % (comment_counts[0], comment_counts[1])
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if page_num == 0:
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if first_continuation:
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note_prefix = "Downloading initial comment continuation page"
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else:
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note_prefix = " Downloading comment reply thread %d %s" % (comment_counts[2], comment_prog_str)
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else:
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note_prefix = "%sDownloading comment%s page %d %s" % (
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" " if parent else "",
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' replies' if parent else '',
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page_num,
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comment_prog_str)
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browse = self._download_json(
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'https://www.youtube.com/comment_service_ajax', None,
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'%s %s' % (note_prefix, '(retry #%d)' % count if count else ''),
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headers=headers, query=query,
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data=urlencode_postdata({
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'session_token': session_token_list[0]
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}))
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except ExtractorError as e:
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if isinstance(e.cause, compat_HTTPError) and e.cause.code in (500, 503, 404, 413):
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if e.cause.code == 413:
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self.report_warning("Assumed end of comments (received HTTP Error 413)")
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return
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# Downloading page may result in intermittent 5xx HTTP error
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# Sometimes a 404 is also recieved. See: https://github.com/ytdl-org/youtube-dl/issues/28289
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last_error = 'HTTP Error %s' % e.cause.code
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if e.cause.code == 404:
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last_error = last_error + " (this API is probably deprecated)"
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if count < retries:
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continue
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raise
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else:
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session_token = try_get(browse, lambda x: x['xsrf_token'], compat_str)
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if session_token:
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session_token_list[0] = session_token
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response = try_get(browse,
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(lambda x: x['response'],
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lambda x: x[1]['response'])) or {}
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if response.get('continuationContents'):
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break
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# YouTube sometimes gives reload: now json if something went wrong (e.g. bad auth)
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if browse.get('reload'):
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raise ExtractorError("Invalid or missing params in continuation request", expected=False)
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# TODO: not tested, merged from old extractor
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err_msg = browse.get('externalErrorMessage')
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if err_msg:
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raise ExtractorError('YouTube said: %s' % err_msg, expected=False)
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# Youtube sometimes sends incomplete data
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# See: https://github.com/ytdl-org/youtube-dl/issues/28194
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last_error = 'Incomplete data received'
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if count >= retries:
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self._downloader.report_error(last_error)
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if not response:
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break
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known_continuation_renderers = {
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'itemSectionContinuation': extract_thread,
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'commentRepliesContinuation': extract_thread
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}
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# extract next root continuation from the results
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continuation_contents = try_get(
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response, lambda x: x['continuationContents'], dict) or {}
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for key, value in continuation_contents.items():
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if key not in known_continuation_renderers:
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continue
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continuation_renderer = value
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if first_continuation:
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first_continuation = False
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expected_comment_count = try_get(
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continuation_renderer,
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(lambda x: x['header']['commentsHeaderRenderer']['countText']['runs'][0]['text'],
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lambda x: x['header']['commentsHeaderRenderer']['commentsCount']['runs'][0]['text']),
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compat_str)
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if expected_comment_count:
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comment_counts[1] = str_to_int(expected_comment_count)
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self.to_screen("Downloading ~%d comments" % str_to_int(expected_comment_count))
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yield comment_counts[1]
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# TODO: cli arg.
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# 1/True for newest, 0/False for popular (default)
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comment_sort_index = int(True)
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sort_continuation_renderer = try_get(
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continuation_renderer,
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lambda x: x['header']['commentsHeaderRenderer']['sortMenu']['sortFilterSubMenuRenderer']['subMenuItems']
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[comment_sort_index]['continuation']['reloadContinuationData'], dict)
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# If this fails, the initial continuation page
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# starts off with popular anyways.
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if sort_continuation_renderer:
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continuation = YoutubeTabIE._build_continuation_query(
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continuation=sort_continuation_renderer.get('continuation'),
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ctp=sort_continuation_renderer.get('clickTrackingParams'))
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self.to_screen("Sorting comments by %s" % ('popular' if comment_sort_index == 0 else 'newest'))
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break
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for entry in known_continuation_renderers[key](continuation_renderer):
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yield entry
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continuation = YoutubeTabIE._extract_continuation(continuation_renderer) # TODO
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break
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def _extract_comments(self, ytcfg, video_id, contents, webpage, xsrf_token):
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"""Entry for comment extraction"""
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comments = []
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known_entry_comment_renderers = (
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'itemSectionRenderer',
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)
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estimated_total = 0
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for entry in contents:
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for key, renderer in entry.items():
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if key not in known_entry_comment_renderers:
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continue
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comment_iter = self._comment_entries(
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renderer,
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identity_token=self._extract_identity_token(webpage, item_id=video_id),
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account_syncid=self._extract_account_syncid(ytcfg),
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session_token_list=[xsrf_token])
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for comment in comment_iter:
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if isinstance(comment, int):
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estimated_total = comment
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continue
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comments.append(comment)
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break
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self.to_screen("Downloaded %d/%d comments" % (len(comments), estimated_total))
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return {
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'comments': comments,
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'comment_count': len(comments),
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}
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def _real_extract(self, url):
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url, smuggled_data = unsmuggle_url(url, {})
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video_id = self._match_id(url)
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@ -2024,156 +2315,8 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
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errnote='Unable to download video annotations', fatal=False,
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data=urlencode_postdata({xsrf_field_name: xsrf_token}))
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# Get comments
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# TODO: Refactor and move to seperate function
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def extract_comments():
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expected_video_comment_count = 0
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video_comments = []
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comment_xsrf = xsrf_token
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def find_value(html, key, num_chars=2, separator='"'):
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pos_begin = html.find(key) + len(key) + num_chars
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pos_end = html.find(separator, pos_begin)
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return html[pos_begin: pos_end]
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def search_dict(partial, key):
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if isinstance(partial, dict):
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for k, v in partial.items():
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if k == key:
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yield v
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else:
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for o in search_dict(v, key):
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yield o
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elif isinstance(partial, list):
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for i in partial:
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for o in search_dict(i, key):
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yield o
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continuations = []
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if initial_data:
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try:
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ncd = next(search_dict(initial_data, 'nextContinuationData'))
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continuations = [ncd['continuation']]
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# Handle videos where comments have been disabled entirely
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except StopIteration:
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pass
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def get_continuation(continuation, session_token, replies=False):
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query = {
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'pbj': 1,
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'ctoken': continuation,
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}
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if replies:
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query['action_get_comment_replies'] = 1
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else:
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query['action_get_comments'] = 1
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while True:
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content, handle = self._download_webpage_handle(
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'https://www.youtube.com/comment_service_ajax',
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video_id,
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note=False,
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expected_status=[413],
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data=urlencode_postdata({
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'session_token': session_token
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}),
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query=query,
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headers={
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'Accept': '*/*',
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'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0',
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'X-YouTube-Client-Name': '1',
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'X-YouTube-Client-Version': '2.20201202.06.01'
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}
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)
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response_code = handle.getcode()
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if (response_code == 200):
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return self._parse_json(content, video_id)
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if (response_code == 413):
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return None
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raise ExtractorError('Unexpected HTTP error code: %s' % response_code)
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first_continuation = True
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chain_msg = ''
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self.to_screen('Downloading comments')
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while continuations:
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continuation = continuations.pop()
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comment_response = get_continuation(continuation, comment_xsrf)
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if not comment_response:
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continue
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if list(search_dict(comment_response, 'externalErrorMessage')):
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raise ExtractorError('Error returned from server: ' + next(search_dict(comment_response, 'externalErrorMessage')))
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if 'continuationContents' not in comment_response['response']:
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# Something is wrong here. Youtube won't accept this continuation token for some reason and responds with a user satisfaction dialog (error?)
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continue
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# not sure if this actually helps
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if 'xsrf_token' in comment_response:
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comment_xsrf = comment_response['xsrf_token']
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item_section = comment_response['response']['continuationContents']['itemSectionContinuation']
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if first_continuation:
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expected_video_comment_count = int(item_section['header']['commentsHeaderRenderer']['countText']['runs'][0]['text'].replace(' Comments', '').replace('1 Comment', '1').replace(',', ''))
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first_continuation = False
|
||||
if 'contents' not in item_section:
|
||||
# continuation returned no comments?
|
||||
# set an empty array as to not break the for loop
|
||||
item_section['contents'] = []
|
||||
|
||||
for meta_comment in item_section['contents']:
|
||||
comment = meta_comment['commentThreadRenderer']['comment']['commentRenderer']
|
||||
video_comments.append({
|
||||
'id': comment['commentId'],
|
||||
'text': ''.join([c['text'] for c in try_get(comment, lambda x: x['contentText']['runs'], list) or []]),
|
||||
'time_text': ''.join([c['text'] for c in comment['publishedTimeText']['runs']]),
|
||||
'author': comment.get('authorText', {}).get('simpleText', ''),
|
||||
'votes': comment.get('voteCount', {}).get('simpleText', '0'),
|
||||
'author_thumbnail': comment['authorThumbnail']['thumbnails'][-1]['url'],
|
||||
'parent': 'root'
|
||||
})
|
||||
if 'replies' not in meta_comment['commentThreadRenderer']:
|
||||
continue
|
||||
|
||||
reply_continuations = [rcn['nextContinuationData']['continuation'] for rcn in meta_comment['commentThreadRenderer']['replies']['commentRepliesRenderer']['continuations']]
|
||||
while reply_continuations:
|
||||
time.sleep(1)
|
||||
continuation = reply_continuations.pop()
|
||||
replies_data = get_continuation(continuation, comment_xsrf, True)
|
||||
if not replies_data or 'continuationContents' not in replies_data[1]['response']:
|
||||
continue
|
||||
|
||||
if self._downloader.params.get('verbose', False):
|
||||
chain_msg = ' (chain %s)' % comment['commentId']
|
||||
self.to_screen('Comments downloaded: %d of ~%d%s' % (len(video_comments), expected_video_comment_count, chain_msg))
|
||||
reply_comment_meta = replies_data[1]['response']['continuationContents']['commentRepliesContinuation']
|
||||
for reply_meta in reply_comment_meta.get('contents', {}):
|
||||
reply_comment = reply_meta['commentRenderer']
|
||||
video_comments.append({
|
||||
'id': reply_comment['commentId'],
|
||||
'text': ''.join([c['text'] for c in reply_comment['contentText']['runs']]),
|
||||
'time_text': ''.join([c['text'] for c in reply_comment['publishedTimeText']['runs']]),
|
||||
'author': reply_comment.get('authorText', {}).get('simpleText', ''),
|
||||
'votes': reply_comment.get('voteCount', {}).get('simpleText', '0'),
|
||||
'author_thumbnail': reply_comment['authorThumbnail']['thumbnails'][-1]['url'],
|
||||
'parent': comment['commentId']
|
||||
})
|
||||
if 'continuations' not in reply_comment_meta or len(reply_comment_meta['continuations']) == 0:
|
||||
continue
|
||||
reply_continuations += [rcn['nextContinuationData']['continuation'] for rcn in reply_comment_meta['continuations']]
|
||||
|
||||
self.to_screen('Comments downloaded: %d of ~%d' % (len(video_comments), expected_video_comment_count))
|
||||
if 'continuations' in item_section:
|
||||
continuations += [ncd['nextContinuationData']['continuation'] for ncd in item_section['continuations']]
|
||||
time.sleep(1)
|
||||
|
||||
self.to_screen('Total comments downloaded: %d of ~%d' % (len(video_comments), expected_video_comment_count))
|
||||
return {
|
||||
'comments': video_comments,
|
||||
'comment_count': expected_video_comment_count
|
||||
}
|
||||
|
||||
if get_comments:
|
||||
info['__post_extractor'] = extract_comments
|
||||
info['__post_extractor'] = lambda: self._extract_comments(ytcfg, video_id, contents, webpage, xsrf_token)
|
||||
|
||||
self.mark_watched(video_id, player_response)
|
||||
|
||||
|
|
@ -3031,27 +3174,6 @@ class YoutubeTabIE(YoutubeBaseInfoExtractor):
|
|||
if err_msg:
|
||||
raise ExtractorError('YouTube said: %s' % err_msg, expected=expected)
|
||||
|
||||
def _extract_identity_token(self, webpage, item_id):
|
||||
ytcfg = self._extract_ytcfg(item_id, webpage)
|
||||
if ytcfg:
|
||||
token = try_get(ytcfg, lambda x: x['ID_TOKEN'], compat_str)
|
||||
if token:
|
||||
return token
|
||||
return self._search_regex(
|
||||
r'\bID_TOKEN["\']\s*:\s*["\'](.+?)["\']', webpage,
|
||||
'identity token', default=None)
|
||||
|
||||
@staticmethod
|
||||
def _extract_account_syncid(data):
|
||||
"""Extract syncId required to download private playlists of secondary channels"""
|
||||
sync_ids = (
|
||||
try_get(data, lambda x: x['responseContext']['mainAppWebResponseContext']['datasyncId'], compat_str)
|
||||
or '').split("||")
|
||||
if len(sync_ids) >= 2 and sync_ids[1]:
|
||||
# datasyncid is of the form "channel_syncid||user_syncid" for secondary channel
|
||||
# and just "user_syncid||" for primary channel. We only want the channel_syncid
|
||||
return sync_ids[0]
|
||||
|
||||
def _extract_webpage(self, url, item_id):
|
||||
retries = self._downloader.params.get('extractor_retries', 3)
|
||||
count = -1
|
||||
|
|
|
|||
Loading…
Reference in New Issue