1ec02199ea
Because of the new ctoken methodology for getting comment replies, the more comments button automatically works inside the comment reply thread when there are more replies than the limit (250). This commit also updates the max_replies for that ctoken so the next 250 replies will be retrieved for the more comments ctoken. Signed-off-by: Jesús <heckyel@hyperbola.info>
224 lines
8.3 KiB
Python
224 lines
8.3 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 urllib
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import re
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import traceback
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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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mobile_headers = {
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'User-Agent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_1 like Mac OS X) AppleWebKit/603.1.30 (KHTML, like Gecko) Version/10.0 Mobile/14E304 Safari/602.1',
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'Accept': '*/*',
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'Accept-Language': 'en-US,en;q=0.5',
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'X-YouTube-Client-Name': '2',
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'X-YouTube-Client-Version': '2.20180823',
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}
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def request_comments(ctoken, replies=False):
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base_url = 'https://m.youtube.com/watch_comment?'
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if replies:
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base_url += 'action_get_comment_replies=1&ctoken='
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else:
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base_url += 'action_get_comments=1&ctoken='
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url = base_url + ctoken.replace("=", "%3D") + "&pbj=1"
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content = util.fetch_url(
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url, headers=mobile_headers,
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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'])
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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=250)
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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(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['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['like_count']) + ' 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=250)
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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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comments_info['page_number'] = page_number = str(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'], '/mqdefault.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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comments_info.update(yt_data_extract.extract_comments_info(
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request_comments(
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make_comment_ctoken(video_id, sort, offset, lc, secret_key)
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)
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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'] = traceback.format_exc()
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except Exception as e:
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comments_info['error'] = traceback.format_exc()
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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(request_comments(ctoken, replies))
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post_process_comments_info(comments_info)
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if not replies:
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other_sort_url = util.URL_ORIGIN + '/comments?ctoken=' + make_comment_ctoken(comments_info['video_id'], sort=1 - comments_info['sort'])
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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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