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