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import base64
import youtube.common as common
import urllib
import json
from string import Template
import youtube.proto as proto
import gevent
import math
with open("yt_playlist_template.html", "r") as file:
yt_playlist_template = Template(file.read())
def youtube_obfuscated_endian(offset):
if offset < 128:
return bytes((offset,))
first_byte = 255 & offset
second_byte = 255 & (offset >> 7)
second_byte = second_byte | 1
# The next 2 bytes encode the offset in little endian order,
# BUT, it's done in a strange way. The least significant bit (LSB) of the second byte is not part
# of the offset. Instead, to get the number which the two bytes encode, that LSB
# of the second byte is combined with the most significant bit (MSB) of the first byte
# in a logical AND. Replace the two bits with the result of the AND to get the two little endian
# bytes that represent the offset.
return bytes((first_byte, second_byte))
# just some garbage that's required, don't know what it means, if it means anything.
ctoken_header = b'\xe2\xa9\x85\xb2\x02' # e2 a9 85 b2 02
def byte(x):
return bytes((x,))
# TL;DR: the offset is hidden inside 3 nested base 64 encodes with random junk data added on the side periodically
def create_ctoken(playlist_id, offset):
obfuscated_offset = b'\x08' + youtube_obfuscated_endian(offset) # 0x08 slapped on for no apparent reason
obfuscated_offset = b'PT:' + base64.urlsafe_b64encode(obfuscated_offset).replace(b'=', b'')
obfuscated_offset = b'z' + byte(len(obfuscated_offset)) + obfuscated_offset
obfuscated_offset = base64.urlsafe_b64encode(obfuscated_offset).replace(b'=', b'%3D')
playlist_bytes = b'VL' + bytes(playlist_id, 'ascii')
main_info = b'\x12' + byte(len(playlist_bytes)) + playlist_bytes + b'\x1a' + byte(len(obfuscated_offset)) + obfuscated_offset
ctoken = base64.urlsafe_b64encode(ctoken_header + byte(len(main_info)) + main_info)
return ctoken.decode('ascii')
def playlist_ctoken(playlist_id, offset):
offset = proto.uint(1, offset)
# this is just obfuscation as far as I can tell. It doesn't even follow protobuf
offset = b'PT:' + proto.unpadded_b64encode(offset)
offset = proto.string(15, offset)
continuation_info = proto.string( 3, proto.percent_b64encode(offset) )
playlist_id = proto.string(2, 'VL' + playlist_id )
pointless_nest = proto.string(80226972, playlist_id + continuation_info)
return base64.urlsafe_b64encode(pointless_nest).decode('ascii')
# initial request types:
# polymer_json: https://m.youtube.com/playlist?list=PLv3TTBr1W_9tppikBxAE_G6qjWdBljBHJ&pbj=1&lact=0
# ajax json: https://m.youtube.com/playlist?list=PLv3TTBr1W_9tppikBxAE_G6qjWdBljBHJ&pbj=1&lact=0 with header X-YouTube-Client-Version: 1.20180418
# continuation request types:
# polymer_json: https://m.youtube.com/playlist?&ctoken=[...]&pbj=1
# ajax json: https://m.youtube.com/playlist?action_continuation=1&ajax=1&ctoken=[...]
headers_1 = (
('Accept', '*/*'),
('Accept-Language', 'en-US,en;q=0.5'),
('X-YouTube-Client-Name', '1'),
('X-YouTube-Client-Version', '2.20180614'),
)
def playlist_first_page(playlist_id):
url = 'https://m.youtube.com/playlist?list=' + playlist_id + '&ajax=1&disable_polymer=true'
content = common.fetch_url(url, common.mobile_ua + headers_1)
if content[0:4] == b")]}'":
content = content[4:]
content = json.loads(common.uppercase_escape(content.decode('utf-8')))
return content
ajax_info_dispatch = {
'view_count_text': ('views', common.get_text),
'num_videos_text': ('size', lambda node: common.get_text(node).split(' ')[0]),
'thumbnail': ('thumbnail', lambda node: node.url),
'title': ('title', common.get_text),
'owner_text': ('author', common.get_text),
'owner_endpoint': ('author_url', lambda node: node.url),
'description': ('description', common.get_formatted_text),
}
def metadata_info(ajax_json):
info = {}
try:
for key, node in ajax_json.items():
try:
simple_key, function = dispatch[key]
except KeyError:
continue
info[simple_key] = function(node)
return info
except (KeyError,IndexError):
print(ajax_json)
raise
#https://m.youtube.com/playlist?itct=CBMQybcCIhMIptj9xJaJ2wIV2JKcCh3Idwu-&ctoken=4qmFsgI2EiRWTFBMT3kwajlBdmxWWlB0bzZJa2pLZnB1MFNjeC0tN1BHVEMaDmVnWlFWRHBEUWxFJTNE&pbj=1
def get_videos_ajax(playlist_id, page):
url = "https://m.youtube.com/playlist?action_continuation=1&ajax=1&ctoken=" + playlist_ctoken(playlist_id, (int(page)-1)*20)
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': '1.20180508',
}
print("Sending playlist ajax request")
content = common.fetch_url(url, headers)
with open('playlist_debug', 'wb') as f:
f.write(content)
content = content[4:]
print("Finished recieving playlist response")
info = json.loads(common.uppercase_escape(content.decode('utf-8')))
return info
def get_playlist_videos(ajax_json):
videos = []
#info = get_bloated_playlist_videos(playlist_id, page)
#print(info)
video_list = ajax_json['content']['continuation_contents']['contents']
for video_json_crap in video_list:
try:
videos.append({
"title": video_json_crap["title"]['runs'][0]['text'],
"id": video_json_crap["video_id"],
"views": "",
"duration": common.default_multi_get(video_json_crap, 'length', 'runs', 0, 'text', default=''), # livestreams dont have a length
"author": video_json_crap['short_byline']['runs'][0]['text'],
"author_url": '',
"published": '',
'playlist_index': '',
})
except (KeyError, IndexError):
print(video_json_crap)
raise
return videos
def get_playlist_videos_format2(playlist_id, page):
videos = []
info = get_bloated_playlist_videos(playlist_id, page)
video_list = info['response']['continuationContents']['playlistVideoListContinuation']['contents']
for video_json_crap in video_list:
video_json_crap = video_json_crap['videoRenderer']
try:
videos.append({
"title": video_json_crap["title"]['runs'][0]['text'],
"video_id": video_json_crap["videoId"],
"views": "",
"duration": common.default_multi_get(video_json_crap, 'lengthText', 'runs', 0, 'text', default=''), # livestreams dont have a length
"uploader": video_json_crap['shortBylineText']['runs'][0]['text'],
"uploader_url": common.ORIGIN_URL + video_json_crap['shortBylineText']['runs'][0]['navigationEndpoint']['commandMetadata']['webCommandMetadata']['url'],
"published": common.default_multi_get(video_json_crap, 'publishedTimeText', 'simpleText', default=''),
'playlist_index': video_json_crap['index']['runs'][0]['text'],
})
except (KeyError, IndexError):
print(video_json_crap)
raise
return videos
def playlist_videos_html(ajax_json):
result = ''
for info in get_playlist_videos(ajax_json):
result += common.small_video_item_html(info)
return result
playlist_stat_template = Template('''
<div>$stat</div>''')
def get_playlist_page(query_string):
parameters = urllib.parse.parse_qs(query_string)
playlist_id = parameters['list'][0]
page = parameters.get("page", "1")[0]
if page == "1":
first_page_json = playlist_first_page(playlist_id)
this_page_json = first_page_json
else:
tasks = (
gevent.spawn(playlist_first_page, playlist_id ),
gevent.spawn(get_videos_ajax, playlist_id, page)
)
gevent.joinall(tasks)
first_page_json, this_page_json = tasks[0].value, tasks[1].value
try:
video_list = this_page_json['content']['section_list']['contents'][0]['contents'][0]['contents']
except KeyError:
video_list = this_page_json['content']['continuation_contents']['contents']
videos_html = ''
for video_json in video_list:
info = common.ajax_info(video_json)
videos_html += common.video_item_html(info, common.small_video_item_template)
metadata = common.ajax_info(first_page_json['content']['playlist_header'])
video_count = int(metadata['size'].replace(',', ''))
page_buttons = common.page_buttons_html(int(page), math.ceil(video_count/20), common.URL_ORIGIN + "/playlist", query_string)
html_ready = common.get_html_ready(metadata)
html_ready['page_title'] = html_ready['title'] + ' - Page ' + str(page)
stats = ''
stats += playlist_stat_template.substitute(stat=html_ready['size'] + ' videos')
stats += playlist_stat_template.substitute(stat=html_ready['views'])
return yt_playlist_template.substitute(
videos = videos_html,
page_buttons = page_buttons,
stats = stats,
**html_ready
)
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