272 lines
12 KiB
Python
272 lines
12 KiB
Python
from youtube import proto, util, yt_data_extract, accounts
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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 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 comment_replies_ctoken(video_id, comment_id, max_results=500):
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params = proto.string(2, comment_id) + proto.uint(9, max_results)
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params = proto.nested(3, params)
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result = proto.nested(2, proto.string(2, video_id)) + proto.uint(3,6) + proto.nested(6, params)
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return base64.urlsafe_b64encode(result).decode('ascii')
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def ctoken_metadata(ctoken):
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result = dict()
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params = proto.parse(proto.b64_to_bytes(ctoken))
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result['video_id'] = proto.parse(params[2])[2].decode('ascii')
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offset_information = proto.parse(params[6])
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result['offset'] = offset_information.get(5, 0)
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result['is_replies'] = False
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if (3 in offset_information) and (2 in proto.parse(offset_information[3])):
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result['is_replies'] = True
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result['sort'] = None
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else:
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try:
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result['sort'] = proto.parse(offset_information[4])[6]
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except KeyError:
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result['sort'] = 0
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return result
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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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if replies: # let's make it use different urls for no reason despite all the data being encoded
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base_url = "https://m.youtube.com/watch_comment?action_get_comment_replies=1&ctoken="
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else:
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base_url = "https://m.youtube.com/watch_comment?action_get_comments=1&ctoken="
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url = base_url + ctoken.replace("=", "%3D") + "&pbj=1"
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for i in range(0,8): # don't retry more than 8 times
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content = util.fetch_url(url, headers=mobile_headers, report_text="Retrieved comments", debug_name='request_comments')
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if content[0:4] == b")]}'": # random closing characters included at beginning of response for some reason
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content = content[4:]
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elif content[0:10] == b'\n<!DOCTYPE': # occasionally returns html instead of json for no reason
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content = b''
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print("got <!DOCTYPE>, retrying")
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continue
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break
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return content
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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(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 parse_comments_polymer(content):
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try:
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video_title = ''
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content = json.loads(util.uppercase_escape(content.decode('utf-8')))
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url = content[1]['url']
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ctoken = urllib.parse.parse_qs(url[url.find('?')+1:])['ctoken'][0]
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metadata = ctoken_metadata(ctoken)
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try:
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comments_raw = content[1]['response']['continuationContents']['commentSectionContinuation']['items']
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except KeyError:
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comments_raw = content[1]['response']['continuationContents']['commentRepliesContinuation']['contents']
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ctoken = util.default_multi_get(content, 1, 'response', 'continuationContents', 'commentSectionContinuation', 'continuations', 0, 'nextContinuationData', 'continuation', default='')
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comments = []
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for comment_json in comments_raw:
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number_of_replies = 0
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try:
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comment_thread = comment_json['commentThreadRenderer']
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except KeyError:
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comment_renderer = comment_json['commentRenderer']
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else:
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if 'commentTargetTitle' in comment_thread:
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video_title = comment_thread['commentTargetTitle']['runs'][0]['text']
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if 'replies' in comment_thread:
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view_replies_text = yt_data_extract.get_plain_text(comment_thread['replies']['commentRepliesRenderer']['moreText'])
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view_replies_text = view_replies_text.replace(',', '')
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match = re.search(r'(\d+)', view_replies_text)
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if match is None:
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number_of_replies = 1
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else:
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number_of_replies = int(match.group(1))
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comment_renderer = comment_thread['comment']['commentRenderer']
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comment = {
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'author_id': comment_renderer.get('authorId', ''),
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'author_avatar': comment_renderer['authorThumbnail']['thumbnails'][0]['url'],
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'likes': comment_renderer['likeCount'],
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'published': yt_data_extract.get_plain_text(comment_renderer['publishedTimeText']),
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'text': comment_renderer['contentText'].get('runs', ''),
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'number_of_replies': number_of_replies,
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'comment_id': comment_renderer['commentId'],
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}
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if 'authorText' in comment_renderer: # deleted channels have no name or channel link
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comment['author'] = yt_data_extract.get_plain_text(comment_renderer['authorText'])
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comment['author_url'] = comment_renderer['authorEndpoint']['commandMetadata']['webCommandMetadata']['url']
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comment['author_channel_id'] = comment_renderer['authorEndpoint']['browseEndpoint']['browseId']
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else:
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comment['author'] = ''
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comment['author_url'] = ''
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comment['author_channel_id'] = ''
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comments.append(comment)
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except Exception as e:
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print('Error parsing comments: ' + str(e))
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comments = ()
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ctoken = ''
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return {
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'ctoken': ctoken,
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'comments': comments,
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'video_title': video_title,
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'video_id': metadata['video_id'],
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'offset': metadata['offset'],
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'is_replies': metadata['is_replies'],
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'sort': metadata['sort'],
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}
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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_url'] = util.URL_ORIGIN + comment['author_url']
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comment['author_avatar'] = '/' + comment['author_avatar']
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comment['permalink'] = util.URL_ORIGIN + '/watch?v=' + comments_info['video_id'] + '&lc=' + comment['comment_id']
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if comment['author_channel_id'] in accounts.accounts:
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comment['delete_url'] = (util.URL_ORIGIN + '/delete_comment?video_id='
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+ comments_info['video_id']
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+ '&channel_id='+ comment['author_channel_id']
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+ '&author_id=' + comment['author_id']
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+ '&comment_id=' + comment['comment_id'])
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num_replies = comment['number_of_replies']
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if num_replies == 0:
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comment['replies_url'] = util.URL_ORIGIN + '/post_comment?parent_id=' + comment['comment_id'] + "&video_id=" + comments_info['video_id']
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else:
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comment['replies_url'] = util.URL_ORIGIN + '/comments?parent_id=' + comment['comment_id'] + "&video_id=" + comments_info['video_id']
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if num_replies == 0:
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comment['view_replies_text'] = 'Reply'
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elif num_replies == 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(num_replies) + ' replies'
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if comment['likes'] == 1:
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comment['likes_text'] = '1 like'
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else:
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comment['likes_text'] = str(comment['likes']) + ' 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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comments_info['more_comments_url'] = util.URL_ORIGIN + '/comments?ctoken=' + comments_info['ctoken']
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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'] = util.URL_ORIGIN + '/watch?v=' + comments_info['video_id']
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comments_info['video_thumbnail'] = '/i.ytimg.com/vi/'+ comments_info['video_id'] + '/mqdefault.jpg'
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def video_comments(video_id, sort=0, offset=0, lc='', secret_key=''):
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if settings.enable_comments:
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comments_info = parse_comments_polymer(request_comments(make_comment_ctoken(video_id, sort, offset, lc, secret_key)))
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post_process_comments_info(comments_info)
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post_comment_url = util.URL_ORIGIN + "/post_comment?video_id=" + video_id
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other_sort_url = util.URL_ORIGIN + '/comments?ctoken=' + make_comment_ctoken(video_id, sort=1 - sort, lc=lc)
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other_sort_text = 'Sort by ' + ('newest' if sort == 0 else 'top')
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comments_info['comment_links'] = [('Post comment', post_comment_url), (other_sort_text, other_sort_url)]
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return comments_info
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return {}
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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 = False
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if not ctoken:
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video_id = request.args['video_id']
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parent_id = request.args['parent_id']
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ctoken = comment_replies_ctoken(video_id, parent_id)
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replies = True
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comments_info = parse_comments_polymer(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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comment_posting_box_info = {
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'form_action': '' if replies else util.URL_ORIGIN + '/post_comment',
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'video_id': comments_info['video_id'],
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'accounts': accounts.account_list_data(),
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'include_video_id_input': not replies,
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'replying': replies,
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}
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return flask.render_template('comments_page.html',
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comments_info = comments_info,
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comment_posting_box_info = comment_posting_box_info,
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)
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