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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 urllib
import re
import traceback
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')
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):
base_url = 'https://m.youtube.com/watch_comment?'
if replies:
base_url += 'action_get_comment_replies=1&ctoken='
else:
base_url += 'action_get_comments=1&ctoken='
url = base_url + ctoken.replace("=", "%3D") + "&pbj=1"
content = util.fetch_url(
url, headers=mobile_headers,
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=250)
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=250)
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'], '/mqdefault.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)
]
comments_info.update(yt_data_extract.extract_comments_info(
request_comments(
make_comment_ctoken(video_id, sort, offset, lc, secret_key)
)
))
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'] = traceback.format_exc()
except Exception as e:
comments_info['error'] = traceback.format_exc()
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))
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)
)
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