from youtube import proto, util, yt_data_extract, accounts from youtube import yt_app import settings import json import base64 import urllib import re import flask from flask import request # Here's what I know about the secret key (starting with ASJN_i) # *The secret key definitely contains the following information (or perhaps the information is stored at youtube's servers): # -Video id # -Offset # -Sort # *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. # *The ASJN is base64 encoded data, indicated by the fact that the character after "ASJN_i" is one of ("0", "1", "2", "3") # *The encoded data is not valid protobuf # *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 # *The ASJN in the ctoken provided by a response changes in regular intervals of about a second or two. # *Old ASJN's continue to work, and start at the same comment even if new comments have been posted since # *The ASJN has no relation with any of the data in the response it came from def make_comment_ctoken(video_id, sort=0, offset=0, lc='', secret_key=''): video_id = proto.as_bytes(video_id) secret_key = proto.as_bytes(secret_key) page_info = proto.string(4,video_id) + proto.uint(6, sort) offset_information = proto.nested(4, page_info) + proto.uint(5, offset) if secret_key: offset_information = proto.string(1, secret_key) + offset_information page_params = proto.string(2, video_id) if lc: page_params += proto.string(6, proto.percent_b64encode(proto.string(15, lc))) result = proto.nested(2, page_params) + proto.uint(3,6) + proto.nested(6, offset_information) return base64.urlsafe_b64encode(result).decode('ascii') def comment_replies_ctoken(video_id, comment_id, max_results=500): params = proto.string(2, comment_id) + proto.uint(9, max_results) params = proto.nested(3, params) result = proto.nested(2, proto.string(2, video_id)) + proto.uint(3,6) + proto.nested(6, params) return base64.urlsafe_b64encode(result).decode('ascii') 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 mobile_headers = { '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', 'Accept': '*/*', 'Accept-Language': 'en-US,en;q=0.5', 'X-YouTube-Client-Name': '2', 'X-YouTube-Client-Version': '2.20180823', } def request_comments(ctoken, replies=False): if replies: # let's make it use different urls for no reason despite all the data being encoded base_url = "https://m.youtube.com/watch_comment?action_get_comment_replies=1&ctoken=" else: base_url = "https://m.youtube.com/watch_comment?action_get_comments=1&ctoken=" url = base_url + ctoken.replace("=", "%3D") + "&pbj=1" for i in range(0,8): # don't retry more than 8 times content = util.fetch_url(url, headers=mobile_headers, report_text="Retrieved comments") if content[0:4] == b")]}'": # random closing characters included at beginning of response for some reason content = content[4:] elif content[0:10] == b'\n<!DOCTYPE': # occasionally returns html instead of json for no reason content = b'' print("got <!DOCTYPE>, retrying") continue break '''with open('debug/comments_debug', 'wb') as f: f.write(content)''' return content def single_comment_ctoken(video_id, comment_id): page_params = proto.string(2, video_id) + proto.string(6, proto.percent_b64encode(proto.string(15, comment_id))) result = proto.nested(2, page_params) + proto.uint(3,6) return base64.urlsafe_b64encode(result).decode('ascii') def parse_comments_polymer(content): try: video_title = '' content = json.loads(util.uppercase_escape(content.decode('utf-8'))) url = content[1]['url'] ctoken = urllib.parse.parse_qs(url[url.find('?')+1:])['ctoken'][0] metadata = ctoken_metadata(ctoken) try: comments_raw = content[1]['response']['continuationContents']['commentSectionContinuation']['items'] except KeyError: comments_raw = content[1]['response']['continuationContents']['commentRepliesContinuation']['contents'] ctoken = util.default_multi_get(content, 1, 'response', 'continuationContents', 'commentSectionContinuation', 'continuations', 0, 'nextContinuationData', 'continuation', default='') comments = [] for comment_json in comments_raw: number_of_replies = 0 try: comment_thread = comment_json['commentThreadRenderer'] except KeyError: comment_renderer = comment_json['commentRenderer'] else: if 'commentTargetTitle' in comment_thread: video_title = comment_thread['commentTargetTitle']['runs'][0]['text'] if 'replies' in comment_thread: view_replies_text = yt_data_extract.get_plain_text(comment_thread['replies']['commentRepliesRenderer']['moreText']) view_replies_text = view_replies_text.replace(',', '') match = re.search(r'(\d+)', view_replies_text) if match is None: number_of_replies = 1 else: number_of_replies = int(match.group(1)) comment_renderer = comment_thread['comment']['commentRenderer'] comment = { 'author_id': comment_renderer.get('authorId', ''), 'author_avatar': comment_renderer['authorThumbnail']['thumbnails'][0]['url'], 'likes': comment_renderer['likeCount'], 'published': yt_data_extract.get_plain_text(comment_renderer['publishedTimeText']), 'text': comment_renderer['contentText'].get('runs', ''), 'number_of_replies': number_of_replies, 'comment_id': comment_renderer['commentId'], } if 'authorText' in comment_renderer: # deleted channels have no name or channel link comment['author'] = yt_data_extract.get_plain_text(comment_renderer['authorText']) comment['author_url'] = comment_renderer['authorEndpoint']['commandMetadata']['webCommandMetadata']['url'] comment['author_channel_id'] = comment_renderer['authorEndpoint']['browseEndpoint']['browseId'] else: comment['author'] = '' comment['author_url'] = '' comment['author_channel_id'] = '' comments.append(comment) except Exception as e: print('Error parsing comments: ' + str(e)) comments = () ctoken = '' return { 'ctoken': ctoken, 'comments': comments, 'video_title': video_title, 'video_id': metadata['video_id'], 'offset': metadata['offset'], 'is_replies': metadata['is_replies'], 'sort': metadata['sort'], } def post_process_comments_info(comments_info): for comment in comments_info['comments']: comment['author_url'] = util.URL_ORIGIN + comment['author_url'] comment['author_avatar'] = '/' + comment['author_avatar'] comment['permalink'] = util.URL_ORIGIN + '/watch?v=' + comments_info['video_id'] + '&lc=' + comment['comment_id'] if comment['author_channel_id'] in accounts.accounts: comment['delete_url'] = (util.URL_ORIGIN + '/delete_comment?video_id=' + comments_info['video_id'] + '&channel_id='+ comment['author_channel_id'] + '&author_id=' + comment['author_id'] + '&comment_id=' + comment['comment_id']) num_replies = comment['number_of_replies'] if num_replies == 0: comment['replies_url'] = util.URL_ORIGIN + '/post_comment?parent_id=' + comment['comment_id'] + "&video_id=" + comments_info['video_id'] else: comment['replies_url'] = util.URL_ORIGIN + '/comments?parent_id=' + comment['comment_id'] + "&video_id=" + comments_info['video_id'] if num_replies == 0: comment['view_replies_text'] = 'Reply' elif num_replies == 1: comment['view_replies_text'] = '1 reply' else: comment['view_replies_text'] = str(num_replies) + ' replies' if comment['likes'] == 1: comment['likes_text'] = '1 like' else: comment['likes_text'] = str(comment['likes']) + ' likes' comments_info['include_avatars'] = settings.enable_comment_avatars if comments_info['ctoken'] != '': comments_info['more_comments_url'] = util.URL_ORIGIN + '/comments?ctoken=' + comments_info['ctoken'] comments_info['page_number'] = page_number = str(int(comments_info['offset']/20) + 1) if not comments_info['is_replies']: comments_info['sort_text'] = 'top' if comments_info['sort'] == 0 else 'newest' comments_info['video_url'] = util.URL_ORIGIN + '/watch?v=' + comments_info['video_id'] comments_info['video_thumbnail'] = '/i.ytimg.com/vi/'+ comments_info['video_id'] + '/mqdefault.jpg' def video_comments(video_id, sort=0, offset=0, lc='', secret_key=''): if settings.enable_comments: comments_info = parse_comments_polymer(request_comments(make_comment_ctoken(video_id, sort, offset, lc, secret_key))) post_process_comments_info(comments_info) post_comment_url = util.URL_ORIGIN + "/post_comment?video_id=" + video_id other_sort_url = util.URL_ORIGIN + '/comments?ctoken=' + make_comment_ctoken(video_id, sort=1 - sort, lc=lc) other_sort_text = 'Sort by ' + ('newest' if sort == 0 else 'top') comments_info['comment_links'] = [('Post comment', post_comment_url), (other_sort_text, other_sort_url)] return comments_info return {} @yt_app.route('/comments') def get_comments_page(): ctoken = request.args.get('ctoken', '') replies = False if not ctoken: video_id = request.args['video_id'] parent_id = request.args['parent_id'] ctoken = comment_replies_ctoken(video_id, parent_id) replies = True comments_info = parse_comments_polymer(request_comments(ctoken, replies)) post_process_comments_info(comments_info) if not replies: other_sort_url = util.URL_ORIGIN + '/comments?ctoken=' + make_comment_ctoken(comments_info['video_id'], sort=1 - comments_info['sort']) other_sort_text = 'Sort by ' + ('newest' if comments_info['sort'] == 0 else 'top') comments_info['comment_links'] = [(other_sort_text, other_sort_url)] comment_posting_box_info = { 'form_action': '' if replies else util.URL_ORIGIN + '/post_comment', 'video_id': comments_info['video_id'], 'accounts': accounts.account_list_data(), 'include_video_id_input': not replies, 'replying': replies, } return flask.render_template('comments_page.html', comments_info = comments_info, comment_posting_box_info = comment_posting_box_info, )