diff options
Diffstat (limited to 'youtube/comments.py')
| -rw-r--r-- | youtube/comments.py | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/youtube/comments.py b/youtube/comments.py new file mode 100644 index 0000000..92a89e1 --- /dev/null +++ b/youtube/comments.py @@ -0,0 +1,231 @@ +from youtube import proto, util, yt_data_extract +from youtube.util import ( + concat_or_none, + strip_non_ascii +) +from youtube import yt_app +import settings + +import json +import base64 + +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 request_comments(ctoken, replies=False): + url = 'https://m.youtube.com/youtubei/v1/next' + url += '?key=AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8' + data = json.dumps({ + 'context': { + 'client': { + 'hl': 'en', + 'gl': 'US', + 'clientName': 'MWEB', + 'clientVersion': '2.20240328.08.00', + }, + }, + 'continuation': ctoken.replace('=', '%3D'), + }) + + content = util.fetch_url( + url, headers=util.mobile_xhr_headers + util.json_header, data=data, + report_text='Retrieved comments', debug_name='request_comments') + content = content.decode('utf-8') + + polymer_json = json.loads(content) + return polymer_json + + +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 post_process_comments_info(comments_info): + for comment in comments_info['comments']: + comment['author'] = strip_non_ascii(comment['author']) + comment['author_url'] = concat_or_none( + '/', comment['author_url']) + comment['author_avatar'] = concat_or_none( + settings.img_prefix, comment['author_avatar']) + + comment['permalink'] = concat_or_none( + util.URL_ORIGIN, '/watch?v=', + comments_info['video_id'], + '&lc=', comment['id'] + ) + + reply_count = comment['reply_count'] + comment['replies_url'] = None + if comment['reply_ctoken']: + # change max_replies field to 250 in ctoken + ctoken = comment['reply_ctoken'] + ctoken, err = proto.set_protobuf_value( + ctoken, + 'base64p', 6, 3, 9, value=200) + if err: + print('Error setting ctoken value:') + print(err) + comment['replies_url'] = None + comment['replies_url'] = concat_or_none( + util.URL_ORIGIN, + '/comments?replies=1&ctoken=' + ctoken) + + if reply_count == 0: + comment['view_replies_text'] = 'Reply' + elif reply_count == 1: + comment['view_replies_text'] = '1 reply' + else: + comment['view_replies_text'] = str(reply_count) + ' replies' + + if comment['approx_like_count'] == '1': + comment['likes_text'] = '1 like' + else: + comment['likes_text'] = (str(comment['approx_like_count']) + + ' likes') + + comments_info['include_avatars'] = settings.enable_comment_avatars + if comments_info['ctoken']: + ctoken = comments_info['ctoken'] + if comments_info['is_replies']: + replies_param = '&replies=1' + # change max_replies field to 250 in ctoken + new_ctoken, err = proto.set_protobuf_value( + ctoken, + 'base64p', 6, 3, 9, value=200) + if err: + print('Error setting ctoken value:') + print(err) + else: + ctoken = new_ctoken + else: + replies_param = '' + comments_info['more_comments_url'] = concat_or_none( + util.URL_ORIGIN, '/comments?ctoken=', ctoken, replies_param) + + if comments_info['offset'] is None: + comments_info['page_number'] = None + else: + comments_info['page_number'] = 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'] = concat_or_none( + util.URL_ORIGIN, '/watch?v=', comments_info['video_id']) + comments_info['video_thumbnail'] = concat_or_none( + settings.img_prefix, 'https://i.ytimg.com/vi/', + comments_info['video_id'], '/hqdefault.jpg' + ) + + +def video_comments(video_id, sort=0, offset=0, lc='', secret_key=''): + try: + if settings.comments_mode: + comments_info = {'error': None} + 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') + + this_sort_url = (util.URL_ORIGIN + + '/comments?ctoken=' + + make_comment_ctoken(video_id, sort=sort, lc=lc)) + + comments_info['comment_links'] = [ + (other_sort_text, other_sort_url), + ('Direct link', this_sort_url) + ] + + ctoken = make_comment_ctoken(video_id, sort, offset, lc) + comments_info.update(yt_data_extract.extract_comments_info( + request_comments(ctoken), ctoken=ctoken + )) + post_process_comments_info(comments_info) + + return comments_info + else: + return {} + except util.FetchError as e: + if e.code == '429' and settings.route_tor: + comments_info['error'] = 'Error: YouTube blocked the request because the Tor exit node is overutilized.' + if e.error_message: + comments_info['error'] += '\n\n' + e.error_message + comments_info['error'] += '\n\nExit node IP address: %s' % e.ip + else: + comments_info['error'] = 'YouTube blocked the request. IP address: %s' % e.ip + + except Exception as e: + comments_info['error'] = 'YouTube blocked the request. IP address: %s' % e.ip + + if comments_info.get('error'): + print('Error retrieving comments for ' + str(video_id) + ':\n' + + comments_info['error']) + + return comments_info + + +@yt_app.route('/comments') +def get_comments_page(): + ctoken = request.args.get('ctoken', '') + replies = request.args.get('replies', '0') == '1' + + comments_info = yt_data_extract.extract_comments_info( + request_comments(ctoken, replies), ctoken=ctoken + ) + post_process_comments_info(comments_info) + + if not replies: + if comments_info['sort'] is None or comments_info['video_id'] is None: + other_sort_url = None + else: + 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)] + + return flask.render_template( + 'comments_page.html', + comments_info=comments_info, + slim=request.args.get('slim', False) + ) |