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from .common import (get, multi_get, deep_get, multi_deep_get,
liberal_update, conservative_update, remove_redirect, normalize_url,
extract_str, extract_formatted_text, extract_int, extract_approx_int,
extract_date, check_missing_keys, extract_item_info, extract_items,
extract_response)
from youtube import proto
import re
import urllib
from math import ceil
def extract_channel_info(polymer_json, tab):
response, err = extract_response(polymer_json)
if err:
return {'error': err}
metadata = deep_get(response, 'metadata', 'channelMetadataRenderer',
default={})
if not metadata:
metadata = deep_get(response, 'microformat', 'microformatDataRenderer',
default={})
# channel doesn't exist or was terminated
# example terminated channel: https://www.youtube.com/channel/UCnKJeK_r90jDdIuzHXC0Org
if not metadata:
if response.get('alerts'):
error_string = ' '.join(
extract_str(deep_get(alert, 'alertRenderer', 'text'), default='')
for alert in response['alerts']
)
if not error_string:
error_string = 'Failed to extract error'
return {'error': error_string}
elif deep_get(response, 'responseContext', 'errors'):
for error in response['responseContext']['errors'].get('error', []):
if error.get('code') == 'INVALID_VALUE' and error.get('location') == 'browse_id':
return {'error': 'This channel does not exist'}
return {'error': 'Failure getting metadata'}
info = {'error': None}
info['current_tab'] = tab
info['approx_subscriber_count'] = extract_approx_int(deep_get(response,
'header', 'c4TabbedHeaderRenderer', 'subscriberCountText'))
# stuff from microformat (info given by youtube for every page on channel)
info['short_description'] = metadata.get('description')
if info['short_description'] and len(info['short_description']) > 730:
info['short_description'] = info['short_description'][0:730] + '...'
info['channel_name'] = metadata.get('title')
info['avatar'] = normalize_url(multi_deep_get(metadata,
['avatar', 'thumbnails', 0, 'url'],
['thumbnail', 'thumbnails', 0, 'url'],
))
channel_url = multi_get(metadata, 'urlCanonical', 'channelUrl')
if channel_url:
channel_id = get(channel_url.rstrip('/').split('/'), -1)
info['channel_id'] = channel_id
else:
info['channel_id'] = metadata.get('externalId')
if info['channel_id']:
info['channel_url'] = 'https://www.youtube.com/channel/' + channel_id
else:
info['channel_url'] = None
# get items
info['items'] = []
# empty channel
if 'contents' not in response and 'continuationContents' not in response:
return info
if tab in ('videos', 'playlists', 'search'):
items, ctoken = extract_items(response)
additional_info = {'author': info['channel_name'], 'author_url': info['channel_url']}
info['items'] = [extract_item_info(renderer, additional_info) for renderer in items]
if tab == 'search':
info['is_last_page'] = (ctoken is None)
elif tab == 'about':
items, _ = extract_items(response, item_types={'channelAboutFullMetadataRenderer'})
if not items:
info['error'] = 'Could not find channelAboutFullMetadataRenderer'
return info
channel_metadata = items[0]['channelAboutFullMetadataRenderer']
info['links'] = []
for link_json in channel_metadata.get('primaryLinks', ()):
url = remove_redirect(deep_get(link_json, 'navigationEndpoint', 'urlEndpoint', 'url'))
text = extract_str(link_json.get('title'))
info['links'].append( (text, url) )
info['date_joined'] = extract_date(channel_metadata.get('joinedDateText'))
info['view_count'] = extract_int(channel_metadata.get('viewCountText'))
info['description'] = extract_str(channel_metadata.get('description'), default='')
else:
raise NotImplementedError('Unknown or unsupported channel tab: ' + tab)
return info
def extract_search_info(polymer_json):
response, err = extract_response(polymer_json)
if err:
return {'error': err}
info = {'error': None}
info['estimated_results'] = int(response['estimatedResults'])
info['estimated_pages'] = ceil(info['estimated_results']/20)
results, _ = extract_items(response)
info['items'] = []
info['corrections'] = {'type': None}
for renderer in results:
type = list(renderer.keys())[0]
if type == 'shelfRenderer':
continue
if type == 'didYouMeanRenderer':
renderer = renderer[type]
info['corrections'] = {
'type': 'did_you_mean',
'corrected_query': renderer['correctedQueryEndpoint']['searchEndpoint']['query'],
'corrected_query_text': renderer['correctedQuery']['runs'],
}
continue
if type == 'showingResultsForRenderer':
renderer = renderer[type]
info['corrections'] = {
'type': 'showing_results_for',
'corrected_query_text': renderer['correctedQuery']['runs'],
'original_query_text': renderer['originalQuery']['simpleText'],
}
continue
i_info = extract_item_info(renderer)
if i_info.get('type') != 'unsupported':
info['items'].append(i_info)
return info
def extract_playlist_metadata(polymer_json):
response, err = extract_response(polymer_json)
if err:
return {'error': err}
metadata = {'error': None}
header = deep_get(response, 'header', 'playlistHeaderRenderer', default={})
metadata['title'] = extract_str(header.get('title'))
metadata['first_video_id'] = deep_get(header, 'playEndpoint', 'watchEndpoint', 'videoId')
first_id = re.search(r'([a-z_\-]{11})', deep_get(header,
'thumbnail', 'thumbnails', 0, 'url', default=''))
if first_id:
conservative_update(metadata, 'first_video_id', first_id.group(1))
if metadata['first_video_id'] is None:
metadata['thumbnail'] = None
else:
metadata['thumbnail'] = 'https://i.ytimg.com/vi/' + metadata['first_video_id'] + '/mqdefault.jpg'
metadata['video_count'] = extract_int(header.get('numVideosText'))
metadata['description'] = extract_str(header.get('descriptionText'), default='')
metadata['author'] = extract_str(header.get('ownerText'))
metadata['author_id'] = multi_deep_get(header,
['ownerText', 'runs', 0, 'navigationEndpoint', 'browseEndpoint', 'browseId'],
['ownerEndpoint', 'browseEndpoint', 'browseId'])
if metadata['author_id']:
metadata['author_url'] = 'https://www.youtube.com/channel/' + metadata['author_id']
else:
metadata['author_url'] = None
metadata['view_count'] = extract_int(header.get('viewCountText'))
metadata['like_count'] = extract_int(header.get('likesCountWithoutLikeText'))
for stat in header.get('stats', ()):
text = extract_str(stat)
if 'videos' in text:
conservative_update(metadata, 'video_count', extract_int(text))
elif 'views' in text:
conservative_update(metadata, 'view_count', extract_int(text))
elif 'updated' in text:
metadata['time_published'] = extract_date(text)
return metadata
def extract_playlist_info(polymer_json):
response, err = extract_response(polymer_json)
if err:
return {'error': err}
info = {'error': None}
first_page = 'continuationContents' not in response
video_list, _ = extract_items(response)
info['items'] = [extract_item_info(renderer) for renderer in video_list]
if first_page:
info['metadata'] = extract_playlist_metadata(polymer_json)
return info
def _ctoken_metadata(ctoken):
result = dict()
params = proto.parse(proto.b64_to_bytes(ctoken))
result['video_id'] = proto.parse(params[2])[2].decode('ascii')
offset_information = proto.parse(params[6])
result['offset'] = offset_information.get(5, 0)
result['is_replies'] = False
if (3 in offset_information) and (2 in proto.parse(offset_information[3])):
result['is_replies'] = True
result['sort'] = None
else:
try:
result['sort'] = proto.parse(offset_information[4])[6]
except KeyError:
result['sort'] = 0
return result
def extract_comments_info(polymer_json):
response, err = extract_response(polymer_json)
if err:
return {'error': err}
info = {'error': None}
url = multi_deep_get(polymer_json, [1, 'url'], ['url'])
if url:
ctoken = urllib.parse.parse_qs(url[url.find('?')+1:])['ctoken'][0]
metadata = _ctoken_metadata(ctoken)
else:
metadata = {}
info['video_id'] = metadata.get('video_id')
info['offset'] = metadata.get('offset')
info['is_replies'] = metadata.get('is_replies')
info['sort'] = metadata.get('sort')
info['video_title'] = None
comments, ctoken = extract_items(response,
item_types={'commentThreadRenderer', 'commentRenderer'})
info['comments'] = []
info['ctoken'] = ctoken
for comment in comments:
comment_info = {}
if 'commentThreadRenderer' in comment: # top level comments
conservative_update(info, 'is_replies', False)
comment_thread = comment['commentThreadRenderer']
info['video_title'] = extract_str(comment_thread.get('commentTargetTitle'))
if 'replies' not in comment_thread:
comment_info['reply_count'] = 0
else:
comment_info['reply_count'] = extract_int(deep_get(comment_thread,
'replies', 'commentRepliesRenderer', 'moreText'
), default=1) # With 1 reply, the text reads "View reply"
comment_renderer = deep_get(comment_thread, 'comment', 'commentRenderer', default={})
elif 'commentRenderer' in comment: # replies
comment_info['reply_count'] = 0 # replyCount, below, not present for replies even if the reply has further replies to it
conservative_update(info, 'is_replies', True)
comment_renderer = comment['commentRenderer']
else:
comment_renderer = {}
# These 3 are sometimes absent, likely because the channel was deleted
comment_info['author'] = extract_str(comment_renderer.get('authorText'))
comment_info['author_url'] = normalize_url(deep_get(comment_renderer,
'authorEndpoint', 'commandMetadata', 'webCommandMetadata', 'url'))
comment_info['author_id'] = deep_get(comment_renderer,
'authorEndpoint', 'browseEndpoint', 'browseId')
comment_info['author_avatar'] = normalize_url(deep_get(
comment_renderer, 'authorThumbnail', 'thumbnails', 0, 'url'))
comment_info['id'] = comment_renderer.get('commentId')
comment_info['text'] = extract_formatted_text(comment_renderer.get('contentText'))
comment_info['time_published'] = extract_str(comment_renderer.get('publishedTimeText'))
comment_info['like_count'] = comment_renderer.get('likeCount')
liberal_update(comment_info, 'reply_count', comment_renderer.get('replyCount'))
info['comments'].append(comment_info)
return info
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