yt_dlp/extractor/vk.py

   1 import collections
   2 import re
   3
   4 from .common import InfoExtractor
   5 from ..compat import compat_urlparse
   6 from ..utils import (
   7     clean_html,
   8     ExtractorError,
   9     get_element_by_class,
  10     int_or_none,
  11     orderedSet,
  12     str_or_none,
  13     str_to_int,
  14     unescapeHTML,
  15     unified_timestamp,
  16     url_or_none,
  17     urlencode_postdata,
  18 )
  19 from .dailymotion import DailymotionIE
  20 from .odnoklassniki import OdnoklassnikiIE
  21 from .pladform import PladformIE
  22 from .vimeo import VimeoIE
  23 from .youtube import YoutubeIE
  24
  25
  26 class VKBaseIE(InfoExtractor):
  27     _NETRC_MACHINE = 'vk'
  28
  29     def _perform_login(self, username, password):
  30         login_page, url_handle = self._download_webpage_handle(
  31             'https://vk.com', None, 'Downloading login page')
  32
  33         login_form = self._hidden_inputs(login_page)
  34
  35         login_form.update({
  36             'email': username.encode('cp1251'),
  37             'pass': password.encode('cp1251'),
  38         })
  39
  40         # vk serves two same remixlhk cookies in Set-Cookie header and expects
  41         # first one to be actually set
  42         self._apply_first_set_cookie_header(url_handle, 'remixlhk')
  43
  44         login_page = self._download_webpage(
  45             'https://vk.com/login', None,
  46             note='Logging in',
  47             data=urlencode_postdata(login_form))
  48
  49         if re.search(r'onLoginFailed', login_page):
  50             raise ExtractorError(
  51                 'Unable to login, incorrect username and/or password', expected=True)
  52
  53     def _download_payload(self, path, video_id, data, fatal=True):
  54         data['al'] = 1
  55         code, payload = self._download_json(
  56             'https://vk.com/%s.php' % path, video_id,
  57             data=urlencode_postdata(data), fatal=fatal,
  58             headers={'X-Requested-With': 'XMLHttpRequest'})['payload']
  59         if code == '3':
  60             self.raise_login_required()
  61         elif code == '8':
  62             raise ExtractorError(clean_html(payload[0][1:-1]), expected=True)
  63         return payload
  64
  65
  66 class VKIE(VKBaseIE):
  67     IE_NAME = 'vk'
  68     IE_DESC = 'VK'
  69     _VALID_URL = r'''(?x)
  70                     https?://
  71                         (?:
  72                             (?:
  73                                 (?:(?:m|new)\.)?vk\.com/video_|
  74                                 (?:www\.)?daxab.com/
  75                             )
  76                             ext\.php\?(?P<embed_query>.*?\boid=(?P<oid>-?\d+).*?\bid=(?P<id>\d+).*)|
  77                             (?:
  78                                 (?:(?:m|new)\.)?vk\.com/(?:.+?\?.*?z=)?(?:video|clip)|
  79                                 (?:www\.)?daxab.com/embed/
  80                             )
  81                             (?P<videoid>-?\d+_\d+)(?:.*\blist=(?P<list_id>([\da-f]+)|(ln-[\da-zA-Z]+)))?
  82                         )
  83                     '''
  84     _TESTS = [
  85         {
  86             'url': 'http://vk.com/videos-77521?z=video-77521_162222515%2Fclub77521',
  87             'md5': '7babad3b85ea2e91948005b1b8b0cb84',
  88             'info_dict': {
  89                 'id': '-77521_162222515',
  90                 'ext': 'mp4',
  91                 'title': 'ProtivoGunz - Хуёвая песня',
  92                 'uploader': 're:(?:Noize MC|Alexander Ilyashenko).*',
  93                 'uploader_id': '-77521',
  94                 'duration': 195,
  95                 'timestamp': 1329049880,
  96                 'upload_date': '20120212',
  97             },
  98         },
  99         {
 100             'url': 'http://vk.com/video205387401_165548505',
 101             'info_dict': {
 102                 'id': '205387401_165548505',
 103                 'ext': 'mp4',
 104                 'title': 'No name',
 105                 'uploader': 'Tom Cruise',
 106                 'uploader_id': '205387401',
 107                 'duration': 9,
 108                 'timestamp': 1374364108,
 109                 'upload_date': '20130720',
 110             }
 111         },
 112         {
 113             'note': 'Embedded video',
 114             'url': 'https://vk.com/video_ext.php?oid=-77521&id=162222515&hash=87b046504ccd8bfa',
 115             'md5': '7babad3b85ea2e91948005b1b8b0cb84',
 116             'info_dict': {
 117                 'id': '-77521_162222515',
 118                 'ext': 'mp4',
 119                 'uploader': 're:(?:Noize MC|Alexander Ilyashenko).*',
 120                 'title': 'ProtivoGunz - Хуёвая песня',
 121                 'duration': 195,
 122                 'upload_date': '20120212',
 123                 'timestamp': 1329049880,
 124                 'uploader_id': '-77521',
 125             },
 126         },
 127         {
 128             # VIDEO NOW REMOVED
 129             # please update if you find a video whose URL follows the same pattern
 130             'url': 'http://vk.com/video-8871596_164049491',
 131             'md5': 'a590bcaf3d543576c9bd162812387666',
 132             'note': 'Only available for registered users',
 133             'info_dict': {
 134                 'id': '-8871596_164049491',
 135                 'ext': 'mp4',
 136                 'uploader': 'Триллеры',
 137                 'title': '► Бойцовский клуб / Fight Club 1999 [HD 720]',
 138                 'duration': 8352,
 139                 'upload_date': '20121218',
 140                 'view_count': int,
 141             },
 142             'skip': 'Removed',
 143         },
 144         {
 145             'url': 'http://vk.com/hd_kino_mania?z=video-43215063_168067957%2F15c66b9b533119788d',
 146             'info_dict': {
 147                 'id': '-43215063_168067957',
 148                 'ext': 'mp4',
 149                 'uploader': 'Bro Mazter',
 150                 'title': ' ',
 151                 'duration': 7291,
 152                 'upload_date': '20140328',
 153                 'uploader_id': '223413403',
 154                 'timestamp': 1396018030,
 155             },
 156             'skip': 'Requires vk account credentials',
 157         },
 158         {
 159             'url': 'http://m.vk.com/video-43215063_169084319?list=125c627d1aa1cebb83&from=wall-43215063_2566540',
 160             'md5': '0c45586baa71b7cb1d0784ee3f4e00a6',
 161             'note': 'ivi.ru embed',
 162             'info_dict': {
 163                 'id': '-43215063_169084319',
 164                 'ext': 'mp4',
 165                 'title': 'Книга Илая',
 166                 'duration': 6771,
 167                 'upload_date': '20140626',
 168                 'view_count': int,
 169             },
 170             'skip': 'Removed',
 171         },
 172         {
 173             'url': 'https://vk.com/video-93049196_456239755?list=ln-cBjJ7S4jYYx3ADnmDT',
 174             'info_dict': {
 175                 'id': '-93049196_456239755',
 176                 'ext': 'mp4',
 177                 'title': '8 серия (озвучка)',
 178                 'duration': 8383,
 179                 'upload_date': '20211222',
 180                 'view_count': int,
 181             },
 182         },
 183         {
 184             # video (removed?) only available with list id
 185             'url': 'https://vk.com/video30481095_171201961?list=8764ae2d21f14088d4',
 186             'md5': '091287af5402239a1051c37ec7b92913',
 187             'info_dict': {
 188                 'id': '30481095_171201961',
 189                 'ext': 'mp4',
 190                 'title': 'ТюменцевВВ_09.07.2015',
 191                 'uploader': 'Anton Ivanov',
 192                 'duration': 109,
 193                 'upload_date': '20150709',
 194                 'view_count': int,
 195             },
 196             'skip': 'Removed',
 197         },
 198         {
 199             # youtube embed
 200             'url': 'https://vk.com/video276849682_170681728',
 201             'info_dict': {
 202                 'id': 'V3K4mi0SYkc',
 203                 'ext': 'mp4',
 204                 'title': "DSWD Awards 'Children's Joy Foundation, Inc.' Certificate of Registration and License to Operate",
 205                 'description': 'md5:bf9c26cfa4acdfb146362682edd3827a',
 206                 'duration': 178,
 207                 'upload_date': '20130116',
 208                 'uploader': "Children's Joy Foundation Inc.",
 209                 'uploader_id': 'thecjf',
 210                 'view_count': int,
 211             },
 212         },
 213         {
 214             # dailymotion embed
 215             'url': 'https://vk.com/video-37468416_456239855',
 216             'info_dict': {
 217                 'id': 'k3lz2cmXyRuJQSjGHUv',
 218                 'ext': 'mp4',
 219                 'title': 'md5:d52606645c20b0ddbb21655adaa4f56f',
 220                 'description': 'md5:424b8e88cc873217f520e582ba28bb36',
 221                 'uploader': 'AniLibria.Tv',
 222                 'upload_date': '20160914',
 223                 'uploader_id': 'x1p5vl5',
 224                 'timestamp': 1473877246,
 225             },
 226             'params': {
 227                 'skip_download': True,
 228             },
 229         },
 230         {
 231             # video key is extra_data not url\d+
 232             'url': 'http://vk.com/video-110305615_171782105',
 233             'md5': 'e13fcda136f99764872e739d13fac1d1',
 234             'info_dict': {
 235                 'id': '-110305615_171782105',
 236                 'ext': 'mp4',
 237                 'title': 'S-Dance, репетиции к The way show',
 238                 'uploader': 'THE WAY SHOW | 17 апреля',
 239                 'uploader_id': '-110305615',
 240                 'timestamp': 1454859345,
 241                 'upload_date': '20160207',
 242             },
 243             'params': {
 244                 'skip_download': True,
 245             },
 246         },
 247         {
 248             # finished live stream, postlive_mp4
 249             'url': 'https://vk.com/videos-387766?z=video-387766_456242764%2Fpl_-387766_-2',
 250             'info_dict': {
 251                 'id': '-387766_456242764',
 252                 'ext': 'mp4',
 253                 'title': 'ИгроМир 2016 День 1 — Игромания Утром',
 254                 'uploader': 'Игромания',
 255                 'duration': 5239,
 256                 # TODO: use act=show to extract view_count
 257                 # 'view_count': int,
 258                 'upload_date': '20160929',
 259                 'uploader_id': '-387766',
 260                 'timestamp': 1475137527,
 261             },
 262             'params': {
 263                 'skip_download': True,
 264             },
 265         },
 266         {
 267             # live stream, hls and rtmp links, most likely already finished live
 268             # stream by the time you are reading this comment
 269             'url': 'https://vk.com/video-140332_456239111',
 270             'only_matching': True,
 271         },
 272         {
 273             # removed video, just testing that we match the pattern
 274             'url': 'http://vk.com/feed?z=video-43215063_166094326%2Fbb50cacd3177146d7a',
 275             'only_matching': True,
 276         },
 277         {
 278             # age restricted video, requires vk account credentials
 279             'url': 'https://vk.com/video205387401_164765225',
 280             'only_matching': True,
 281         },
 282         {
 283             # pladform embed
 284             'url': 'https://vk.com/video-76116461_171554880',
 285             'only_matching': True,
 286         },
 287         {
 288             'url': 'http://new.vk.com/video205387401_165548505',
 289             'only_matching': True,
 290         },
 291         {
 292             # This video is no longer available, because its author has been blocked.
 293             'url': 'https://vk.com/video-10639516_456240611',
 294             'only_matching': True,
 295         },
 296         {
 297             # The video is not available in your region.
 298             'url': 'https://vk.com/video-51812607_171445436',
 299             'only_matching': True,
 300         },
 301         {
 302             'url': 'https://vk.com/clip30014565_456240946',
 303             'only_matching': True,
 304         }]
 305
 306     @staticmethod
 307     def _extract_sibnet_urls(webpage):
 308         # https://help.sibnet.ru/?sibnet_video_embed
 309         return [unescapeHTML(mobj.group('url')) for mobj in re.finditer(
 310             r'<iframe\b[^>]+\bsrc=(["\'])(?P<url>(?:https?:)?//video\.sibnet\.ru/shell\.php\?.*?\bvideoid=\d+.*?)\1',
 311             webpage)]
 312
 313     def _real_extract(self, url):
 314         mobj = self._match_valid_url(url)
 315         video_id = mobj.group('videoid')
 316
 317         mv_data = {}
 318         if video_id:
 319             data = {
 320                 'act': 'show_inline',
 321                 'video': video_id,
 322             }
 323             # Some videos (removed?) can only be downloaded with list id specified
 324             list_id = mobj.group('list_id')
 325             if list_id:
 326                 data['list'] = list_id
 327
 328             payload = self._download_payload('al_video', video_id, data)
 329             info_page = payload[1]
 330             opts = payload[-1]
 331             mv_data = opts.get('mvData') or {}
 332             player = opts.get('player') or {}
 333         else:
 334             video_id = '%s_%s' % (mobj.group('oid'), mobj.group('id'))
 335
 336             info_page = self._download_webpage(
 337                 'http://vk.com/video_ext.php?' + mobj.group('embed_query'), video_id)
 338
 339             error_message = self._html_search_regex(
 340                 [r'(?s)<!><div[^>]+class="video_layer_message"[^>]*>(.+?)</div>',
 341                     r'(?s)<div[^>]+id="video_ext_msg"[^>]*>(.+?)</div>'],
 342                 info_page, 'error message', default=None)
 343             if error_message:
 344                 raise ExtractorError(error_message, expected=True)
 345
 346             if re.search(r'<!>/login\.php\?.*\bact=security_check', info_page):
 347                 raise ExtractorError(
 348                     'You are trying to log in from an unusual location. You should confirm ownership at vk.com to log in with this IP.',
 349                     expected=True)
 350
 351             ERROR_COPYRIGHT = 'Video %s has been removed from public access due to rightholder complaint.'
 352
 353             ERRORS = {
 354                 r'>Видеозапись .*? была изъята из публичного доступа в связи с обращением правообладателя.<':
 355                 ERROR_COPYRIGHT,
 356
 357                 r'>The video .*? was removed from public access by request of the copyright holder.<':
 358                 ERROR_COPYRIGHT,
 359
 360                 r'<!>Please log in or <':
 361                 'Video %s is only available for registered users, '
 362                 'use --username and --password options to provide account credentials.',
 363
 364                 r'<!>Unknown error':
 365                 'Video %s does not exist.',
 366
 367                 r'<!>Видео временно недоступно':
 368                 'Video %s is temporarily unavailable.',
 369
 370                 r'<!>Access denied':
 371                 'Access denied to video %s.',
 372
 373                 r'<!>Видеозапись недоступна, так как её автор был заблокирован.':
 374                 'Video %s is no longer available, because its author has been blocked.',
 375
 376                 r'<!>This video is no longer available, because its author has been blocked.':
 377                 'Video %s is no longer available, because its author has been blocked.',
 378
 379                 r'<!>This video is no longer available, because it has been deleted.':
 380                 'Video %s is no longer available, because it has been deleted.',
 381
 382                 r'<!>The video .+? is not available in your region.':
 383                 'Video %s is not available in your region.',
 384             }
 385
 386             for error_re, error_msg in ERRORS.items():
 387                 if re.search(error_re, info_page):
 388                     raise ExtractorError(error_msg % video_id, expected=True)
 389
 390             player = self._parse_json(self._search_regex(
 391                 r'var\s+playerParams\s*=\s*({.+?})\s*;\s*\n',
 392                 info_page, 'player params'), video_id)
 393
 394         youtube_url = YoutubeIE._extract_url(info_page)
 395         if youtube_url:
 396             return self.url_result(youtube_url, YoutubeIE.ie_key())
 397
 398         vimeo_url = VimeoIE._extract_url(url, info_page)
 399         if vimeo_url is not None:
 400             return self.url_result(vimeo_url, VimeoIE.ie_key())
 401
 402         pladform_url = PladformIE._extract_url(info_page)
 403         if pladform_url:
 404             return self.url_result(pladform_url, PladformIE.ie_key())
 405
 406         m_rutube = re.search(
 407             r'\ssrc="((?:https?:)?//rutube\.ru\\?/(?:video|play)\\?/embed(?:.*?))\\?"', info_page)
 408         if m_rutube is not None:
 409             rutube_url = self._proto_relative_url(
 410                 m_rutube.group(1).replace('\\', ''))
 411             return self.url_result(rutube_url)
 412
 413         dailymotion_urls = DailymotionIE._extract_urls(info_page)
 414         if dailymotion_urls:
 415             return self.url_result(dailymotion_urls[0], DailymotionIE.ie_key())
 416
 417         odnoklassniki_url = OdnoklassnikiIE._extract_url(info_page)
 418         if odnoklassniki_url:
 419             return self.url_result(odnoklassniki_url, OdnoklassnikiIE.ie_key())
 420
 421         sibnet_urls = self._extract_sibnet_urls(info_page)
 422         if sibnet_urls:
 423             return self.url_result(sibnet_urls[0])
 424
 425         m_opts = re.search(r'(?s)var\s+opts\s*=\s*({.+?});', info_page)
 426         if m_opts:
 427             m_opts_url = re.search(r"url\s*:\s*'((?!/\b)[^']+)", m_opts.group(1))
 428             if m_opts_url:
 429                 opts_url = m_opts_url.group(1)
 430                 if opts_url.startswith('//'):
 431                     opts_url = 'http:' + opts_url
 432                 return self.url_result(opts_url)
 433
 434         data = player['params'][0]
 435         title = unescapeHTML(data['md_title'])
 436
 437         # 2 = live
 438         # 3 = post live (finished live)
 439         is_live = data.get('live') == 2
 440
 441         timestamp = unified_timestamp(self._html_search_regex(
 442             r'class=["\']mv_info_date[^>]+>([^<]+)(?:<|from)', info_page,
 443             'upload date', default=None)) or int_or_none(data.get('date'))
 444
 445         view_count = str_to_int(self._search_regex(
 446             r'class=["\']mv_views_count[^>]+>\s*([\d,.]+)',
 447             info_page, 'view count', default=None))
 448
 449         formats = []
 450         for format_id, format_url in data.items():
 451             format_url = url_or_none(format_url)
 452             if not format_url or not format_url.startswith(('http', '//', 'rtmp')):
 453                 continue
 454             if (format_id.startswith(('url', 'cache'))
 455                     or format_id in ('extra_data', 'live_mp4', 'postlive_mp4')):
 456                 height = int_or_none(self._search_regex(
 457                     r'^(?:url|cache)(\d+)', format_id, 'height', default=None))
 458                 formats.append({
 459                     'format_id': format_id,
 460                     'url': format_url,
 461                     'height': height,
 462                 })
 463             elif format_id == 'hls':
 464                 formats.extend(self._extract_m3u8_formats(
 465                     format_url, video_id, 'mp4', 'm3u8_native',
 466                     m3u8_id=format_id, fatal=False, live=is_live))
 467             elif format_id == 'rtmp':
 468                 formats.append({
 469                     'format_id': format_id,
 470                     'url': format_url,
 471                     'ext': 'flv',
 472                 })
 473         self._sort_formats(formats)
 474
 475         subtitles = {}
 476         for sub in data.get('subs') or {}:
 477             subtitles.setdefault(sub.get('lang', 'en'), []).append({
 478                 'ext': sub.get('title', '.srt').split('.')[-1],
 479                 'url': url_or_none(sub.get('url')),
 480             })
 481
 482         return {
 483             'id': video_id,
 484             'formats': formats,
 485             'title': title,
 486             'thumbnail': data.get('jpg'),
 487             'uploader': data.get('md_author'),
 488             'uploader_id': str_or_none(data.get('author_id') or mv_data.get('authorId')),
 489             'duration': int_or_none(data.get('duration') or mv_data.get('duration')),
 490             'timestamp': timestamp,
 491             'view_count': view_count,
 492             'like_count': int_or_none(mv_data.get('likes')),
 493             'comment_count': int_or_none(mv_data.get('commcount')),
 494             'is_live': is_live,
 495             'subtitles': subtitles,
 496         }
 497
 498
 499 class VKUserVideosIE(VKBaseIE):
 500     IE_NAME = 'vk:uservideos'
 501     IE_DESC = "VK - User's Videos"
 502     _VALID_URL = r'https?://(?:(?:m|new)\.)?vk\.com/video/@(?P<id>[^?$#/&]+)(?!\?.*\bz=video)(?:[/?#&](?:.*?\bsection=(?P<section>\w+))?|$)'
 503     _TEMPLATE_URL = 'https://vk.com/videos'
 504     _TESTS = [{
 505         'url': 'https://vk.com/video/@mobidevices',
 506         'info_dict': {
 507             'id': '-17892518_all',
 508         },
 509         'playlist_mincount': 1355,
 510     }, {
 511         'url': 'https://vk.com/video/@mobidevices?section=uploaded',
 512         'info_dict': {
 513             'id': '-17892518_uploaded',
 514         },
 515         'playlist_mincount': 182,
 516     }]
 517     _VIDEO = collections.namedtuple('Video', ['owner_id', 'id'])
 518
 519     def _entries(self, page_id, section):
 520         video_list_json = self._download_payload('al_video', page_id, {
 521             'act': 'load_videos_silent',
 522             'offset': 0,
 523             'oid': page_id,
 524             'section': section,
 525         })[0][section]
 526         count = video_list_json['count']
 527         total = video_list_json['total']
 528         video_list = video_list_json['list']
 529
 530         while True:
 531             for video in video_list:
 532                 v = self._VIDEO._make(video[:2])
 533                 video_id = '%d_%d' % (v.owner_id, v.id)
 534                 yield self.url_result(
 535                     'http://vk.com/video' + video_id, VKIE.ie_key(), video_id)
 536             if count >= total:
 537                 break
 538             video_list_json = self._download_payload('al_video', page_id, {
 539                 'act': 'load_videos_silent',
 540                 'offset': count,
 541                 'oid': page_id,
 542                 'section': section,
 543             })[0][section]
 544             count += video_list_json['count']
 545             video_list = video_list_json['list']
 546
 547     def _real_extract(self, url):
 548         u_id, section = self._match_valid_url(url).groups()
 549         webpage = self._download_webpage(url, u_id)
 550         page_id = self._search_regex(r'data-owner-id\s?=\s?"([^"]+)"', webpage, 'page_id')
 551         if not section:
 552             section = 'all'
 553
 554         return self.playlist_result(self._entries(page_id, section), '%s_%s' % (page_id, section))
 555
 556
 557 class VKWallPostIE(VKBaseIE):
 558     IE_NAME = 'vk:wallpost'
 559     _VALID_URL = r'https?://(?:(?:(?:(?:m|new)\.)?vk\.com/(?:[^?]+\?.*\bw=)?wall(?P<id>-?\d+_\d+)))'
 560     _TESTS = [{
 561         # public page URL, audio playlist
 562         'url': 'https://vk.com/bs.official?w=wall-23538238_35',
 563         'info_dict': {
 564             'id': '-23538238_35',
 565             'title': 'Black Shadow - Wall post -23538238_35',
 566             'description': 'md5:3f84b9c4f9ef499731cf1ced9998cc0c',
 567         },
 568         'playlist': [{
 569             'md5': '5ba93864ec5b85f7ce19a9af4af080f6',
 570             'info_dict': {
 571                 'id': '135220665_111806521',
 572                 'ext': 'mp4',
 573                 'title': 'Black Shadow - Слепое Верование',
 574                 'duration': 370,
 575                 'uploader': 'Black Shadow',
 576                 'artist': 'Black Shadow',
 577                 'track': 'Слепое Верование',
 578             },
 579         }, {
 580             'md5': '4cc7e804579122b17ea95af7834c9233',
 581             'info_dict': {
 582                 'id': '135220665_111802303',
 583                 'ext': 'mp4',
 584                 'title': 'Black Shadow - Война - Негасимое Бездны Пламя!',
 585                 'duration': 423,
 586                 'uploader': 'Black Shadow',
 587                 'artist': 'Black Shadow',
 588                 'track': 'Война - Негасимое Бездны Пламя!',
 589             },
 590         }],
 591         'params': {
 592             'skip_download': True,
 593         },
 594         'skip': 'Requires vk account credentials',
 595     }, {
 596         # single YouTube embed, no leading -
 597         'url': 'https://vk.com/wall85155021_6319',
 598         'info_dict': {
 599             'id': '85155021_6319',
 600             'title': 'Сергей Горбунов - Wall post 85155021_6319',
 601         },
 602         'playlist_count': 1,
 603         'skip': 'Requires vk account credentials',
 604     }, {
 605         # wall page URL
 606         'url': 'https://vk.com/wall-23538238_35',
 607         'only_matching': True,
 608     }, {
 609         # mobile wall page URL
 610         'url': 'https://m.vk.com/wall-23538238_35',
 611         'only_matching': True,
 612     }]
 613     _BASE64_CHARS = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMN0PQRSTUVWXYZO123456789+/='
 614     _AUDIO = collections.namedtuple('Audio', ['id', 'owner_id', 'url', 'title', 'performer', 'duration', 'album_id', 'unk', 'author_link', 'lyrics', 'flags', 'context', 'extra', 'hashes', 'cover_url', 'ads'])
 615
 616     def _decode(self, enc):
 617         dec = ''
 618         e = n = 0
 619         for c in enc:
 620             r = self._BASE64_CHARS.index(c)
 621             cond = n % 4
 622             e = 64 * e + r if cond else r
 623             n += 1
 624             if cond:
 625                 dec += chr(255 & e >> (-2 * n & 6))
 626         return dec
 627
 628     def _unmask_url(self, mask_url, vk_id):
 629         if 'audio_api_unavailable' in mask_url:
 630             extra = mask_url.split('?extra=')[1].split('#')
 631             func, base = self._decode(extra[1]).split(chr(11))
 632             mask_url = list(self._decode(extra[0]))
 633             url_len = len(mask_url)
 634             indexes = [None] * url_len
 635             index = int(base) ^ vk_id
 636             for n in range(url_len - 1, -1, -1):
 637                 index = (url_len * (n + 1) ^ index + n) % url_len
 638                 indexes[n] = index
 639             for n in range(1, url_len):
 640                 c = mask_url[n]
 641                 index = indexes[url_len - 1 - n]
 642                 mask_url[n] = mask_url[index]
 643                 mask_url[index] = c
 644             mask_url = ''.join(mask_url)
 645         return mask_url
 646
 647     def _real_extract(self, url):
 648         post_id = self._match_id(url)
 649
 650         webpage = self._download_payload('wkview', post_id, {
 651             'act': 'show',
 652             'w': 'wall' + post_id,
 653         })[1]
 654
 655         description = clean_html(get_element_by_class('wall_post_text', webpage))
 656         uploader = clean_html(get_element_by_class('author', webpage))
 657
 658         entries = []
 659
 660         for audio in re.findall(r'data-audio="([^"]+)', webpage):
 661             audio = self._parse_json(unescapeHTML(audio), post_id)
 662             a = self._AUDIO._make(audio[:16])
 663             if not a.url:
 664                 continue
 665             title = unescapeHTML(a.title)
 666             performer = unescapeHTML(a.performer)
 667             entries.append({
 668                 'id': '%s_%s' % (a.owner_id, a.id),
 669                 'url': self._unmask_url(a.url, a.ads['vk_id']),
 670                 'title': '%s - %s' % (performer, title) if performer else title,
 671                 'thumbnails': [{'url': c_url} for c_url in a.cover_url.split(',')] if a.cover_url else None,
 672                 'duration': int_or_none(a.duration),
 673                 'uploader': uploader,
 674                 'artist': performer,
 675                 'track': title,
 676                 'ext': 'mp4',
 677                 'protocol': 'm3u8_native',
 678             })
 679
 680         for video in re.finditer(
 681                 r'<a[^>]+href=(["\'])(?P<url>/video(?:-?[\d_]+).*?)\1', webpage):
 682             entries.append(self.url_result(
 683                 compat_urlparse.urljoin(url, video.group('url')), VKIE.ie_key()))
 684
 685         title = 'Wall post %s' % post_id
 686
 687         return self.playlist_result(
 688             orderedSet(entries), post_id,
 689             '%s - %s' % (uploader, title) if uploader else title,
 690             description)