Astounds
56ecd6cb1b
Videos without hq720.jpg thumbnails caused mass 404 errors. Now preserves the actual thumbnail URL from YouTube's API response, falls back to hqdefault.jpg only when no thumbnail is provided. Also picks highest quality thumbnail from API (thumbnails[-1]) and adds progressive fallback for subscription/download functions.
232 lines
8.6 KiB
Python
232 lines
8.6 KiB
Python
from youtube import proto, util, yt_data_extract
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from youtube.util import (
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concat_or_none,
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strip_non_ascii
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)
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from youtube import yt_app
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import settings
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import json
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import base64
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import flask
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from flask import request
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# Here's what I know about the secret key (starting with ASJN_i)
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# *The secret key definitely contains the following information (or perhaps the information is stored at youtube's servers):
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# -Video id
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# -Offset
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# -Sort
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# *If the video id or sort in the ctoken contradicts the ASJN, the response is an error. The offset encoded outside the ASJN is ignored entirely.
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# *The ASJN is base64 encoded data, indicated by the fact that the character after "ASJN_i" is one of ("0", "1", "2", "3")
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# *The encoded data is not valid protobuf
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# *The encoded data (after the 5 or so bytes that are always the same) is indistinguishable from random data according to a battery of randomness tests
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# *The ASJN in the ctoken provided by a response changes in regular intervals of about a second or two.
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# *Old ASJN's continue to work, and start at the same comment even if new comments have been posted since
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# *The ASJN has no relation with any of the data in the response it came from
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def make_comment_ctoken(video_id, sort=0, offset=0, lc='', secret_key=''):
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video_id = proto.as_bytes(video_id)
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secret_key = proto.as_bytes(secret_key)
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page_info = proto.string(4, video_id) + proto.uint(6, sort)
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offset_information = proto.nested(4, page_info) + proto.uint(5, offset)
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if secret_key:
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offset_information = proto.string(1, secret_key) + offset_information
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page_params = proto.string(2, video_id)
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if lc:
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page_params += proto.string(6, proto.percent_b64encode(proto.string(15, lc)))
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result = proto.nested(2, page_params) + proto.uint(3, 6) + proto.nested(6, offset_information)
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return base64.urlsafe_b64encode(result).decode('ascii')
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def request_comments(ctoken, replies=False):
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url = 'https://m.youtube.com/youtubei/v1/next'
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url += '?key=AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8'
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data = json.dumps({
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'context': {
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'client': {
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'hl': 'en',
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'gl': 'US',
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'clientName': 'MWEB',
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'clientVersion': '2.20210804.02.00',
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},
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},
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'continuation': ctoken.replace('=', '%3D'),
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})
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content = util.fetch_url(
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url, headers=util.mobile_xhr_headers + util.json_header, data=data,
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report_text='Retrieved comments', debug_name='request_comments')
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content = content.decode('utf-8')
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polymer_json = json.loads(content)
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return polymer_json
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def single_comment_ctoken(video_id, comment_id):
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page_params = proto.string(2, video_id) + proto.string(
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6, proto.percent_b64encode(proto.string(15, comment_id)))
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result = proto.nested(2, page_params) + proto.uint(3, 6)
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return base64.urlsafe_b64encode(result).decode('ascii')
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def post_process_comments_info(comments_info):
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for comment in comments_info['comments']:
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comment['author'] = strip_non_ascii(comment['author']) if comment.get('author') else ""
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comment['author_url'] = concat_or_none(
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'/', comment['author_url'])
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comment['author_avatar'] = concat_or_none(
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settings.img_prefix, comment['author_avatar'])
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comment['permalink'] = concat_or_none(
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util.URL_ORIGIN, '/watch?v=',
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comments_info['video_id'],
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'&lc=', comment['id']
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)
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reply_count = comment['reply_count']
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comment['replies_url'] = None
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if comment['reply_ctoken']:
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# change max_replies field to 250 in ctoken
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ctoken = comment['reply_ctoken']
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ctoken, err = proto.set_protobuf_value(
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ctoken,
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'base64p', 6, 3, 9, value=200)
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if err:
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print('Error setting ctoken value:')
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print(err)
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comment['replies_url'] = None
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comment['replies_url'] = concat_or_none(
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util.URL_ORIGIN,
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'/comments?replies=1&ctoken=' + ctoken)
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if reply_count == 0:
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comment['view_replies_text'] = 'Reply'
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elif reply_count == 1:
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comment['view_replies_text'] = '1 reply'
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else:
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comment['view_replies_text'] = str(reply_count) + ' replies'
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if comment['approx_like_count'] == '1':
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comment['likes_text'] = '1 like'
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else:
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comment['likes_text'] = (str(comment['approx_like_count'])
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+ ' likes')
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comments_info['include_avatars'] = settings.enable_comment_avatars
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if comments_info['ctoken']:
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ctoken = comments_info['ctoken']
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if comments_info['is_replies']:
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replies_param = '&replies=1'
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# change max_replies field to 250 in ctoken
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new_ctoken, err = proto.set_protobuf_value(
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ctoken,
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'base64p', 6, 3, 9, value=200)
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if err:
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print('Error setting ctoken value:')
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print(err)
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else:
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ctoken = new_ctoken
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else:
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replies_param = ''
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comments_info['more_comments_url'] = concat_or_none(
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util.URL_ORIGIN, '/comments?ctoken=', ctoken, replies_param)
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if comments_info['offset'] is None:
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comments_info['page_number'] = None
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else:
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comments_info['page_number'] = int(comments_info['offset']/20) + 1
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if not comments_info['is_replies']:
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comments_info['sort_text'] = 'top' if comments_info['sort'] == 0 else 'newest'
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comments_info['video_url'] = concat_or_none(
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util.URL_ORIGIN, '/watch?v=', comments_info['video_id'])
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comments_info['video_thumbnail'] = concat_or_none(
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settings.img_prefix, 'https://i.ytimg.com/vi/',
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comments_info['video_id'], '/hqdefault.jpg'
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)
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def video_comments(video_id, sort=0, offset=0, lc='', secret_key=''):
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try:
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if settings.comments_mode:
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comments_info = {'error': None}
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other_sort_url = (
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util.URL_ORIGIN + '/comments?ctoken='
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+ make_comment_ctoken(video_id, sort=1 - sort, lc=lc)
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)
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other_sort_text = 'Sort by ' + ('newest' if sort == 0 else 'top')
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this_sort_url = (util.URL_ORIGIN
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+ '/comments?ctoken='
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+ make_comment_ctoken(video_id, sort=sort, lc=lc))
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comments_info['comment_links'] = [
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(other_sort_text, other_sort_url),
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('Direct link', this_sort_url)
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]
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ctoken = make_comment_ctoken(video_id, sort, offset, lc)
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comments_info.update(yt_data_extract.extract_comments_info(
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request_comments(ctoken), ctoken=ctoken
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))
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post_process_comments_info(comments_info)
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return comments_info
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else:
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return {}
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except util.FetchError as e:
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if e.code == '429' and settings.route_tor:
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comments_info['error'] = 'Error: YouTube blocked the request because the Tor exit node is overutilized.'
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if e.error_message:
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comments_info['error'] += '\n\n' + e.error_message
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comments_info['error'] += '\n\nExit node IP address: %s' % e.ip
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else:
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comments_info['error'] = 'YouTube blocked the request. Error: %s' % str(e)
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except Exception as e:
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comments_info['error'] = 'YouTube blocked the request. Error: %s' % str(e)
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if comments_info.get('error'):
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print('Error retrieving comments for ' + str(video_id) + ':\n' +
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comments_info['error'])
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return comments_info
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@yt_app.route('/comments')
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def get_comments_page():
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ctoken = request.args.get('ctoken', '')
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replies = request.args.get('replies', '0') == '1'
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comments_info = yt_data_extract.extract_comments_info(
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request_comments(ctoken, replies), ctoken=ctoken
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)
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post_process_comments_info(comments_info)
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if not replies:
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if comments_info['sort'] is None or comments_info['video_id'] is None:
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other_sort_url = None
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else:
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other_sort_url = (
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util.URL_ORIGIN
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+ '/comments?ctoken='
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+ make_comment_ctoken(comments_info['video_id'],
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sort=1-comments_info['sort'])
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)
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other_sort_text = 'Sort by ' + ('newest' if comments_info['sort'] == 0 else 'top')
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comments_info['comment_links'] = [(other_sort_text, other_sort_url)]
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return flask.render_template(
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'comments_page.html',
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comments_info=comments_info,
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slim=request.args.get('slim', False)
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)
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