youtube_dl/extractor/youtube.py

   1 # coding: utf-8
   2
   3 import collections
   4 import itertools
   5 import io
   6 import json
   7 import netrc
   8 import re
   9 import socket
  10 import string
  11 import struct
  12 import traceback
  13 import zlib
  14
  15 from .common import InfoExtractor, SearchInfoExtractor
  16 from .subtitles import SubtitlesInfoExtractor
  17 from ..utils import (
  18     compat_http_client,
  19     compat_parse_qs,
  20     compat_urllib_error,
  21     compat_urllib_parse,
  22     compat_urllib_request,
  23     compat_str,
  24
  25     clean_html,
  26     get_element_by_id,
  27     ExtractorError,
  28     unescapeHTML,
  29     unified_strdate,
  30     orderedSet,
  31 )
  32
  33 class YoutubeBaseInfoExtractor(InfoExtractor):
  34     """Provide base functions for Youtube extractors"""
  35     _LOGIN_URL = 'https://accounts.google.com/ServiceLogin'
  36     _LANG_URL = r'https://www.youtube.com/?hl=en&persist_hl=1&gl=US&persist_gl=1&opt_out_ackd=1'
  37     _AGE_URL = 'http://www.youtube.com/verify_age?next_url=/&gl=US&hl=en'
  38     _NETRC_MACHINE = 'youtube'
  39     # If True it will raise an error if no login info is provided
  40     _LOGIN_REQUIRED = False
  41
  42     def report_lang(self):
  43         """Report attempt to set language."""
  44         self.to_screen(u'Setting language')
  45
  46     def _set_language(self):
  47         request = compat_urllib_request.Request(self._LANG_URL)
  48         try:
  49             self.report_lang()
  50             compat_urllib_request.urlopen(request).read()
  51         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
  52             self._downloader.report_warning(u'unable to set language: %s' % compat_str(err))
  53             return False
  54         return True
  55
  56     def _login(self):
  57         (username, password) = self._get_login_info()
  58         # No authentication to be performed
  59         if username is None:
  60             if self._LOGIN_REQUIRED:
  61                 raise ExtractorError(u'No login info available, needed for using %s.' % self.IE_NAME, expected=True)
  62             return False
  63
  64         request = compat_urllib_request.Request(self._LOGIN_URL)
  65         try:
  66             login_page = compat_urllib_request.urlopen(request).read().decode('utf-8')
  67         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
  68             self._downloader.report_warning(u'unable to fetch login page: %s' % compat_str(err))
  69             return False
  70
  71         galx = None
  72         dsh = None
  73         match = re.search(re.compile(r'<input.+?name="GALX".+?value="(.+?)"', re.DOTALL), login_page)
  74         if match:
  75           galx = match.group(1)
  76         match = re.search(re.compile(r'<input.+?name="dsh".+?value="(.+?)"', re.DOTALL), login_page)
  77         if match:
  78           dsh = match.group(1)
  79
  80         # Log in
  81         login_form_strs = {
  82                 u'continue': u'https://www.youtube.com/signin?action_handle_signin=true&feature=sign_in_button&hl=en_US&nomobiletemp=1',
  83                 u'Email': username,
  84                 u'GALX': galx,
  85                 u'Passwd': password,
  86                 u'PersistentCookie': u'yes',
  87                 u'_utf8': u'霱',
  88                 u'bgresponse': u'js_disabled',
  89                 u'checkConnection': u'',
  90                 u'checkedDomains': u'youtube',
  91                 u'dnConn': u'',
  92                 u'dsh': dsh,
  93                 u'pstMsg': u'0',
  94                 u'rmShown': u'1',
  95                 u'secTok': u'',
  96                 u'signIn': u'Sign in',
  97                 u'timeStmp': u'',
  98                 u'service': u'youtube',
  99                 u'uilel': u'3',
 100                 u'hl': u'en_US',
 101         }
 102         # Convert to UTF-8 *before* urlencode because Python 2.x's urlencode
 103         # chokes on unicode
 104         login_form = dict((k.encode('utf-8'), v.encode('utf-8')) for k,v in login_form_strs.items())
 105         login_data = compat_urllib_parse.urlencode(login_form).encode('ascii')
 106         request = compat_urllib_request.Request(self._LOGIN_URL, login_data)
 107         try:
 108             self.report_login()
 109             login_results = compat_urllib_request.urlopen(request).read().decode('utf-8')
 110             if re.search(r'(?i)<form[^>]* id="gaia_loginform"', login_results) is not None:
 111                 self._downloader.report_warning(u'unable to log in: bad username or password')
 112                 return False
 113         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 114             self._downloader.report_warning(u'unable to log in: %s' % compat_str(err))
 115             return False
 116         return True
 117
 118     def _confirm_age(self):
 119         age_form = {
 120                 'next_url':     '/',
 121                 'action_confirm':   'Confirm',
 122                 }
 123         request = compat_urllib_request.Request(self._AGE_URL, compat_urllib_parse.urlencode(age_form))
 124         try:
 125             self.report_age_confirmation()
 126             compat_urllib_request.urlopen(request).read().decode('utf-8')
 127         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 128             raise ExtractorError(u'Unable to confirm age: %s' % compat_str(err))
 129         return True
 130
 131     def _real_initialize(self):
 132         if self._downloader is None:
 133             return
 134         if not self._set_language():
 135             return
 136         if not self._login():
 137             return
 138         self._confirm_age()
 139
 140
 141 class YoutubeIE(YoutubeBaseInfoExtractor, SubtitlesInfoExtractor):
 142     IE_DESC = u'YouTube.com'
 143     _VALID_URL = r"""^
 144                      (
 145                          (?:https?://)?                                       # http(s):// (optional)
 146                          (?:(?:(?:(?:\w+\.)?youtube(?:-nocookie)?\.com/|
 147                             tube\.majestyc\.net/|
 148                             youtube\.googleapis\.com/)                        # the various hostnames, with wildcard subdomains
 149                          (?:.*?\#/)?                                          # handle anchor (#/) redirect urls
 150                          (?:                                                  # the various things that can precede the ID:
 151                              (?:(?:v|embed|e)/)                               # v/ or embed/ or e/
 152                              |(?:                                             # or the v= param in all its forms
 153                                  (?:(?:watch|movie)(?:_popup)?(?:\.php)?)?    # preceding watch(_popup|.php) or nothing (like /?v=xxxx)
 154                                  (?:\?|\#!?)                                  # the params delimiter ? or # or #!
 155                                  (?:.*?&)?                                    # any other preceding param (like /?s=tuff&v=xxxx)
 156                                  v=
 157                              )
 158                          ))
 159                          |youtu\.be/                                          # just youtu.be/xxxx
 160                          )
 161                      )?                                                       # all until now is optional -> you can pass the naked ID
 162                      ([0-9A-Za-z_-]{11})                                      # here is it! the YouTube video ID
 163                      (?(1).+)?                                                # if we found the ID, everything can follow
 164                      $"""
 165     _NEXT_URL_RE = r'[\?&]next_url=([^&]+)'
 166     # Listed in order of quality
 167     _available_formats = ['38', '37', '46', '22', '45', '35', '44', '34', '18', '43', '6', '5', '36', '17', '13',
 168                           # Apple HTTP Live Streaming
 169                           '96', '95', '94', '93', '92', '132', '151',
 170                           # 3D
 171                           '85', '84', '102', '83', '101', '82', '100',
 172                           # Dash video
 173                           '138', '137', '248', '136', '247', '135', '246',
 174                           '245', '244', '134', '243', '133', '242', '160',
 175                           # Dash audio
 176                           '141', '172', '140', '171', '139',
 177                           ]
 178     _available_formats_prefer_free = ['38', '46', '37', '45', '22', '44', '35', '43', '34', '18', '6', '5', '36', '17', '13',
 179                                       # Apple HTTP Live Streaming
 180                                       '96', '95', '94', '93', '92', '132', '151',
 181                                       # 3D
 182                                       '85', '102', '84', '101', '83', '100', '82',
 183                                       # Dash video
 184                                       '138', '248', '137', '247', '136', '246', '245',
 185                                       '244', '135', '243', '134', '242', '133', '160',
 186                                       # Dash audio
 187                                       '172', '141', '171', '140', '139',
 188                                       ]
 189     _video_formats_map = {
 190         'flv': ['35', '34', '6', '5'],
 191         '3gp': ['36', '17', '13'],
 192         'mp4': ['38', '37', '22', '18'],
 193         'webm': ['46', '45', '44', '43'],
 194     }
 195     _video_extensions = {
 196         '13': '3gp',
 197         '17': '3gp',
 198         '18': 'mp4',
 199         '22': 'mp4',
 200         '36': '3gp',
 201         '37': 'mp4',
 202         '38': 'mp4',
 203         '43': 'webm',
 204         '44': 'webm',
 205         '45': 'webm',
 206         '46': 'webm',
 207
 208         # 3d videos
 209         '82': 'mp4',
 210         '83': 'mp4',
 211         '84': 'mp4',
 212         '85': 'mp4',
 213         '100': 'webm',
 214         '101': 'webm',
 215         '102': 'webm',
 216
 217         # Apple HTTP Live Streaming
 218         '92': 'mp4',
 219         '93': 'mp4',
 220         '94': 'mp4',
 221         '95': 'mp4',
 222         '96': 'mp4',
 223         '132': 'mp4',
 224         '151': 'mp4',
 225
 226         # Dash mp4
 227         '133': 'mp4',
 228         '134': 'mp4',
 229         '135': 'mp4',
 230         '136': 'mp4',
 231         '137': 'mp4',
 232         '138': 'mp4',
 233         '139': 'mp4',
 234         '140': 'mp4',
 235         '141': 'mp4',
 236         '160': 'mp4',
 237
 238         # Dash webm
 239         '171': 'webm',
 240         '172': 'webm',
 241         '242': 'webm',
 242         '243': 'webm',
 243         '244': 'webm',
 244         '245': 'webm',
 245         '246': 'webm',
 246         '247': 'webm',
 247         '248': 'webm',
 248     }
 249     _video_dimensions = {
 250         '5': '240x400',
 251         '6': '???',
 252         '13': '???',
 253         '17': '144x176',
 254         '18': '360x640',
 255         '22': '720x1280',
 256         '34': '360x640',
 257         '35': '480x854',
 258         '36': '240x320',
 259         '37': '1080x1920',
 260         '38': '3072x4096',
 261         '43': '360x640',
 262         '44': '480x854',
 263         '45': '720x1280',
 264         '46': '1080x1920',
 265         '82': '360p',
 266         '83': '480p',
 267         '84': '720p',
 268         '85': '1080p',
 269         '92': '240p',
 270         '93': '360p',
 271         '94': '480p',
 272         '95': '720p',
 273         '96': '1080p',
 274         '100': '360p',
 275         '101': '480p',
 276         '102': '720p',
 277         '132': '240p',
 278         '151': '72p',
 279         '133': '240p',
 280         '134': '360p',
 281         '135': '480p',
 282         '136': '720p',
 283         '137': '1080p',
 284         '138': '>1080p',
 285         '139': '48k',
 286         '140': '128k',
 287         '141': '256k',
 288         '160': '192p',
 289         '171': '128k',
 290         '172': '256k',
 291         '242': '240p',
 292         '243': '360p',
 293         '244': '480p',
 294         '245': '480p',
 295         '246': '480p',
 296         '247': '720p',
 297         '248': '1080p',
 298     }
 299     _special_itags = {
 300         '82': '3D',
 301         '83': '3D',
 302         '84': '3D',
 303         '85': '3D',
 304         '100': '3D',
 305         '101': '3D',
 306         '102': '3D',
 307         '133': 'DASH Video',
 308         '134': 'DASH Video',
 309         '135': 'DASH Video',
 310         '136': 'DASH Video',
 311         '137': 'DASH Video',
 312         '138': 'DASH Video',
 313         '139': 'DASH Audio',
 314         '140': 'DASH Audio',
 315         '141': 'DASH Audio',
 316         '160': 'DASH Video',
 317         '171': 'DASH Audio',
 318         '172': 'DASH Audio',
 319         '242': 'DASH Video',
 320         '243': 'DASH Video',
 321         '244': 'DASH Video',
 322         '245': 'DASH Video',
 323         '246': 'DASH Video',
 324         '247': 'DASH Video',
 325         '248': 'DASH Video',
 326     }
 327
 328     IE_NAME = u'youtube'
 329     _TESTS = [
 330         {
 331             u"url":  u"http://www.youtube.com/watch?v=BaW_jenozKc",
 332             u"file":  u"BaW_jenozKc.mp4",
 333             u"info_dict": {
 334                 u"title": u"youtube-dl test video \"'/\\ä↭𝕐",
 335                 u"uploader": u"Philipp Hagemeister",
 336                 u"uploader_id": u"phihag",
 337                 u"upload_date": u"20121002",
 338                 u"description": u"test chars:  \"'/\\ä↭𝕐\n\nThis is a test video for youtube-dl.\n\nFor more information, contact phihag@phihag.de ."
 339             }
 340         },
 341         {
 342             u"url":  u"http://www.youtube.com/watch?v=1ltcDfZMA3U",
 343             u"file":  u"1ltcDfZMA3U.flv",
 344             u"note": u"Test VEVO video (#897)",
 345             u"info_dict": {
 346                 u"upload_date": u"20070518",
 347                 u"title": u"Maps - It Will Find You",
 348                 u"description": u"Music video by Maps performing It Will Find You.",
 349                 u"uploader": u"MuteUSA",
 350                 u"uploader_id": u"MuteUSA"
 351             }
 352         },
 353         {
 354             u"url":  u"http://www.youtube.com/watch?v=UxxajLWwzqY",
 355             u"file":  u"UxxajLWwzqY.mp4",
 356             u"note": u"Test generic use_cipher_signature video (#897)",
 357             u"info_dict": {
 358                 u"upload_date": u"20120506",
 359                 u"title": u"Icona Pop - I Love It (feat. Charli XCX) [OFFICIAL VIDEO]",
 360                 u"description": u"md5:3e2666e0a55044490499ea45fe9037b7",
 361                 u"uploader": u"Icona Pop",
 362                 u"uploader_id": u"IconaPop"
 363             }
 364         },
 365         {
 366             u"url":  u"https://www.youtube.com/watch?v=07FYdnEawAQ",
 367             u"file":  u"07FYdnEawAQ.mp4",
 368             u"note": u"Test VEVO video with age protection (#956)",
 369             u"info_dict": {
 370                 u"upload_date": u"20130703",
 371                 u"title": u"Justin Timberlake - Tunnel Vision (Explicit)",
 372                 u"description": u"md5:64249768eec3bc4276236606ea996373",
 373                 u"uploader": u"justintimberlakeVEVO",
 374                 u"uploader_id": u"justintimberlakeVEVO"
 375             }
 376         },
 377         {
 378             u'url': u'https://www.youtube.com/watch?v=TGi3HqYrWHE',
 379             u'file': u'TGi3HqYrWHE.mp4',
 380             u'note': u'm3u8 video',
 381             u'info_dict': {
 382                 u'title': u'Triathlon - Men - London 2012 Olympic Games',
 383                 u'description': u'- Men -  TR02 - Triathlon - 07 August 2012 - London 2012 Olympic Games',
 384                 u'uploader': u'olympic',
 385                 u'upload_date': u'20120807',
 386                 u'uploader_id': u'olympic',
 387             },
 388             u'params': {
 389                 u'skip_download': True,
 390             },
 391         },
 392     ]
 393
 394
 395     @classmethod
 396     def suitable(cls, url):
 397         """Receives a URL and returns True if suitable for this IE."""
 398         if YoutubePlaylistIE.suitable(url): return False
 399         return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
 400
 401     def __init__(self, *args, **kwargs):
 402         super(YoutubeIE, self).__init__(*args, **kwargs)
 403         self._jsplayer_cache = {}
 404
 405     def report_video_webpage_download(self, video_id):
 406         """Report attempt to download video webpage."""
 407         self.to_screen(u'%s: Downloading video webpage' % video_id)
 408
 409     def report_video_info_webpage_download(self, video_id):
 410         """Report attempt to download video info webpage."""
 411         self.to_screen(u'%s: Downloading video info webpage' % video_id)
 412
 413     def report_information_extraction(self, video_id):
 414         """Report attempt to extract video information."""
 415         self.to_screen(u'%s: Extracting video information' % video_id)
 416
 417     def report_unavailable_format(self, video_id, format):
 418         """Report extracted video URL."""
 419         self.to_screen(u'%s: Format %s not available' % (video_id, format))
 420
 421     def report_rtmp_download(self):
 422         """Indicate the download will use the RTMP protocol."""
 423         self.to_screen(u'RTMP download detected')
 424
 425     def _extract_signature_function(self, video_id, player_url):
 426         id_m = re.match(r'.*-(?P<id>[^.]+)\.(?P<ext>[^.]+)$', player_url)
 427         player_type = id_m.group('ext')
 428         player_id = id_m.group('id')
 429
 430         if player_type == 'js':
 431             code = self._download_webpage(
 432                 player_url, video_id,
 433                 note=u'Downloading %s player %s' % (player_type, jsplayer_id),
 434                 errnote=u'Download of %s failed' % player_url)
 435             return self._parse_sig_js(code)
 436         elif player_tpye == 'swf':
 437             urlh = self._request_webpage(
 438                 player_url, video_id,
 439                 note=u'Downloading %s player %s' % (player_type, jsplayer_id),
 440                 errnote=u'Download of %s failed' % player_url)
 441             code = urlh.read()
 442             return self._parse_sig_swf(code)
 443         else:
 444             assert False, 'Invalid player type %r' % player_type
 445
 446     def _parse_sig_js(self, jscode):
 447         funcname = self._search_regex(
 448             r'signature=([a-zA-Z]+)', jscode,
 449             u'Initial JS player signature function name')
 450
 451         functions = {}
 452
 453         def argidx(varname):
 454             return string.lowercase.index(varname)
 455
 456         def interpret_statement(stmt, local_vars, allow_recursion=20):
 457             if allow_recursion < 0:
 458                 raise ExctractorError(u'Recursion limit reached')
 459
 460             if stmt.startswith(u'var '):
 461                 stmt = stmt[len(u'var '):]
 462             ass_m = re.match(r'^(?P<out>[a-z]+)(?:\[(?P<index>[^\]]+)\])?' +
 463                              r'=(?P<expr>.*)$', stmt)
 464             if ass_m:
 465                 if ass_m.groupdict().get('index'):
 466                     def assign(val):
 467                         lvar = local_vars[ass_m.group('out')]
 468                         idx = interpret_expression(ass_m.group('index'),
 469                                                    local_vars, allow_recursion)
 470                         assert isinstance(idx, int)
 471                         lvar[idx] = val
 472                         return val
 473                     expr = ass_m.group('expr')
 474                 else:
 475                     def assign(val):
 476                         local_vars[ass_m.group('out')] = val
 477                         return val
 478                     expr = ass_m.group('expr')
 479             elif stmt.startswith(u'return '):
 480                 assign = lambda v: v
 481                 expr = stmt[len(u'return '):]
 482             else:
 483                 raise ExtractorError(
 484                     u'Cannot determine left side of statement in %r' % stmt)
 485
 486             v = interpret_expression(expr, local_vars, allow_recursion)
 487             return assign(v)
 488
 489         def interpret_expression(expr, local_vars, allow_recursion):
 490             if expr.isdigit():
 491                 return int(expr)
 492
 493             if expr.isalpha():
 494                 return local_vars[expr]
 495
 496             m = re.match(r'^(?P<in>[a-z]+)\.(?P<member>.*)$', expr)
 497             if m:
 498                 member = m.group('member')
 499                 val = local_vars[m.group('in')]
 500                 if member == 'split("")':
 501                     return list(val)
 502                 if member == 'join("")':
 503                     return u''.join(val)
 504                 if member == 'length':
 505                     return len(val)
 506                 if member == 'reverse()':
 507                     return val[::-1]
 508                 slice_m = re.match(r'slice\((?P<idx>.*)\)', member)
 509                 if slice_m:
 510                     idx = interpret_expression(
 511                         slice_m.group('idx'), local_vars, allow_recursion-1)
 512                     return val[idx:]
 513
 514             m = re.match(
 515                 r'^(?P<in>[a-z]+)\[(?P<idx>.+)\]$', expr)
 516             if m:
 517                 val = local_vars[m.group('in')]
 518                 idx = interpret_expression(m.group('idx'), local_vars,
 519                                            allow_recursion-1)
 520                 return val[idx]
 521
 522             m = re.match(r'^(?P<a>.+?)(?P<op>[%])(?P<b>.+?)$', expr)
 523             if m:
 524                 a = interpret_expression(m.group('a'),
 525                                          local_vars, allow_recursion)
 526                 b = interpret_expression(m.group('b'),
 527                                          local_vars, allow_recursion)
 528                 return a % b
 529
 530             m = re.match(
 531                 r'^(?P<func>[a-zA-Z]+)\((?P<args>[a-z0-9,]+)\)$', expr)
 532             if m:
 533                 fname = m.group('func')
 534                 if fname not in functions:
 535                     functions[fname] = extract_function(fname)
 536                 argvals = [int(v) if v.isdigit() else local_vars[v]
 537                            for v in m.group('args').split(',')]
 538                 return functions[fname](argvals)
 539             raise ExtractorError(u'Unsupported JS expression %r' % expr)
 540
 541         def extract_function(funcname):
 542             func_m = re.search(
 543                 r'function ' + re.escape(funcname) +
 544                 r'\((?P<args>[a-z,]+)\){(?P<code>[^}]+)}',
 545                 jscode)
 546             argnames = func_m.group('args').split(',')
 547
 548             def resf(args):
 549                 local_vars = dict(zip(argnames, args))
 550                 for stmt in func_m.group('code').split(';'):
 551                     res = interpret_statement(stmt, local_vars)
 552                 return res
 553             return resf
 554
 555         initial_function = extract_function(funcname)
 556         return lambda s: initial_function([s])
 557
 558     def _parse_sig_swf(self, file_contents):
 559         if file_contents[1:3] != b'WS':
 560             raise ExtractorError(
 561                 u'Not an SWF file; header is %r' % file_contents[:3])
 562         if file_contents[:1] == b'C':
 563             content = zlib.decompress(file_contents[8:])
 564         else:
 565             raise NotImplementedError(u'Unsupported compression format %r' %
 566                                       file_contents[:1])
 567
 568         def extract_tags(content):
 569             pos = 0
 570             while pos < len(content):
 571                 header16 = struct.unpack('<H', content[pos:pos+2])[0]
 572                 pos += 2
 573                 tag_code = header16 >> 6
 574                 tag_len = header16 & 0x3f
 575                 if tag_len == 0x3f:
 576                     tag_len = struct.unpack('<I', content[pos:pos+4])[0]
 577                     pos += 4
 578                 assert pos+tag_len <= len(content)
 579                 yield (tag_code, content[pos:pos+tag_len])
 580                 pos += tag_len
 581
 582         code_tag = next(tag
 583                         for tag_code, tag in extract_tags(content)
 584                         if tag_code == 82)
 585         p = code_tag.index(b'\0', 4) + 1
 586
 587         # Parse ABC (AVM2 ByteCode)
 588         def read_int(data=None, pos=None):
 589             if hasattr(data, 'read'):
 590                 assert pos is None
 591
 592                 res = 0
 593                 shift = 0
 594                 for _ in range(5):
 595                     buf = data.read(1)
 596                     assert len(buf) == 1
 597                     b = struct.unpack('<B', buf)[0]
 598                     res = res | ((b & 0x7f) << shift)
 599                     if b & 0x80 == 0:
 600                         break
 601                     shift += 7
 602                 return res
 603
 604             if data is None:
 605                 data = code_tag
 606             if pos is None:
 607                 pos = p
 608             res = 0
 609             shift = 0
 610             for _ in range(5):
 611                 b = struct.unpack('<B', data[pos:pos+1])[0]
 612                 pos += 1
 613                 res = res | ((b & 0x7f) << shift)
 614                 if b & 0x80 == 0:
 615                     break
 616                 shift += 7
 617             return (res, pos)
 618         assert read_int(b'\x00', 0) == (0, 1)
 619         assert read_int(b'\x10', 0) == (16, 1)
 620         assert read_int(b'\x34', 0) == (0x34, 1)
 621         assert read_int(b'\xb4\x12', 0) == (0x12 * 0x80 + 0x34, 2)
 622         assert read_int(b'\xff\xff\xff\x00', 0) == (0x1fffff, 4)
 623
 624         def u30(*args, **kwargs):
 625             res = read_int(*args, **kwargs)
 626             if isinstance(res, tuple):
 627                 assert res[0] & 0xf0000000 == 0
 628             else:
 629                 assert res & 0xf0000000 == 0
 630             return res
 631         u32 = read_int
 632
 633         def s32(data=None, pos=None):
 634             v, pos = read_int(data, pos)
 635             if v & 0x80000000 != 0:
 636                 v = - ((v ^ 0xffffffff) + 1)
 637             return (v, pos)
 638         assert s32(b'\xff\xff\xff\xff\x0f', 0) == (-1, 5)
 639
 640         def string():
 641             slen, p = u30()
 642             return (code_tag[p:p+slen].decode('utf-8'), p + slen)
 643
 644         def read_byte(data=None, pos=None):
 645             if data is None:
 646                 data = code_tag
 647             if pos is None:
 648                 pos = p
 649             res = struct.unpack('<B', data[pos:pos+1])[0]
 650             return (res, pos + 1)
 651
 652         # minor_version + major_version
 653         p += 2 + 2
 654
 655         # Constant pool
 656         int_count, p = u30()
 657         for _c in range(1, int_count):
 658             _, p = s32()
 659         uint_count, p = u30()
 660         for _c in range(1, uint_count):
 661             _, p = u32()
 662         double_count, p = u30()
 663         p += (double_count-1) * 8
 664         string_count, p = u30()
 665         constant_strings = [u'']
 666         for _c in range(1, string_count):
 667             s, p = string()
 668             constant_strings.append(s)
 669         namespace_count, p = u30()
 670         for _c in range(1, namespace_count):
 671             p += 1        # kind
 672             _, p = u30()  # name
 673         ns_set_count, p = u30()
 674         for _c in range(1, ns_set_count):
 675             count, p = u30()
 676             for _c2 in range(count):
 677                 _, p = u30()
 678         multiname_count, p = u30()
 679         MULTINAME_SIZES = {
 680             0x07: 2,  # QName
 681             0x0d: 2,  # QNameA
 682             0x0f: 1,  # RTQName
 683             0x10: 1,  # RTQNameA
 684             0x11: 0,  # RTQNameL
 685             0x12: 0,  # RTQNameLA
 686             0x09: 2,  # Multiname
 687             0x0e: 2,  # MultinameA
 688             0x1b: 1,  # MultinameL
 689             0x1c: 1,  # MultinameLA
 690         }
 691         multinames = [u'']
 692         for _c in range(1, multiname_count):
 693             kind, p = u30()
 694             assert kind in MULTINAME_SIZES, u'Invalid multiname kind %r' % kind
 695             if kind == 0x07:
 696                 namespace_idx, p = u30()
 697                 name_idx, p = u30()
 698                 multinames.append(constant_strings[name_idx])
 699             else:
 700                 multinames.append('[MULTINAME kind: %d]' % kind)
 701                 for _c2 in range(MULTINAME_SIZES[kind]):
 702                     _, p = u30()
 703
 704         # Methods
 705         method_count, p = u30()
 706         MethodInfo = collections.namedtuple(
 707             'MethodInfo',
 708             ['NEED_ARGUMENTS', 'NEED_REST'])
 709         method_infos = []
 710         for method_id in range(method_count):
 711             param_count, p = u30()
 712             _, p = u30()  # return type
 713             for _ in range(param_count):
 714                 _, p = u30()  # param type
 715             _, p = u30()  # name index (always 0 for youtube)
 716             flags, p = read_byte()
 717             if flags & 0x08 != 0:
 718                 # Options present
 719                 option_count, p = u30()
 720                 for c in range(option_count):
 721                     _, p = u30()  # val
 722                     p += 1        # kind
 723             if flags & 0x80 != 0:
 724                 # Param names present
 725                 for _ in range(param_count):
 726                     _, p = u30()  # param name
 727             mi = MethodInfo(flags & 0x01 != 0, flags & 0x04 != 0)
 728             method_infos.append(mi)
 729
 730         # Metadata
 731         metadata_count, p = u30()
 732         for _c in range(metadata_count):
 733             _, p = u30()  # name
 734             item_count, p = u30()
 735             for _c2 in range(item_count):
 736                 _, p = u30()  # key
 737                 _, p = u30()  # value
 738
 739         def parse_traits_info(pos=None):
 740             if pos is None:
 741                 pos = p
 742             trait_name_idx, pos = u30(pos=pos)
 743             kind_full, pos = read_byte(pos=pos)
 744             kind = kind_full & 0x0f
 745             attrs = kind_full >> 4
 746             methods = {}
 747             if kind in [0x00, 0x06]:  # Slot or Const
 748                 _, pos = u30(pos=pos)  # Slot id
 749                 type_name_idx, pos = u30(pos=pos)
 750                 vindex, pos = u30(pos=pos)
 751                 if vindex != 0:
 752                     _, pos = read_byte(pos=pos)  # vkind
 753             elif kind in [0x01, 0x02, 0x03]:  # Method / Getter / Setter
 754                 _, pos = u30(pos=pos)  # disp_id
 755                 method_idx, pos = u30(pos=pos)
 756                 methods[multinames[trait_name_idx]] = method_idx
 757             elif kind == 0x04:  # Class
 758                 _, pos = u30(pos=pos)  # slot_id
 759                 _, pos = u30(pos=pos)  # classi
 760             elif kind == 0x05:  # Function
 761                 _, pos = u30(pos=pos)  # slot_id
 762                 function_idx, pos = u30(pos=pos)
 763                 methods[function_idx] = multinames[trait_name_idx]
 764             else:
 765                 raise ExtractorError(u'Unsupported trait kind %d' % kind)
 766
 767             if attrs & 0x4 != 0:  # Metadata present
 768                 metadata_count, pos = u30(pos=pos)
 769                 for _c3 in range(metadata_count):
 770                     _, pos = u30(pos=pos)
 771
 772             return (methods, pos)
 773
 774         # Classes
 775         TARGET_CLASSNAME = u'SignatureDecipher'
 776         searched_idx = multinames.index(TARGET_CLASSNAME)
 777         searched_class_id = None
 778         class_count, p = u30()
 779         for class_id in range(class_count):
 780             name_idx, p = u30()
 781             if name_idx == searched_idx:
 782                 # We found the class we're looking for!
 783                 searched_class_id = class_id
 784             _, p = u30()  # super_name idx
 785             flags, p = read_byte()
 786             if flags & 0x08 != 0:  # Protected namespace is present
 787                 protected_ns_idx, p = u30()
 788             intrf_count, p = u30()
 789             for _c2 in range(intrf_count):
 790                 _, p = u30()
 791             _, p = u30()  # iinit
 792             trait_count, p = u30()
 793             for _c2 in range(trait_count):
 794                 _, p = parse_traits_info()
 795
 796         if searched_class_id is None:
 797             raise ExtractorError(u'Target class %r not found' %
 798                                  TARGET_CLASSNAME)
 799
 800         method_names = {}
 801         method_idxs = {}
 802         for class_id in range(class_count):
 803             _, p = u30()  # cinit
 804             trait_count, p = u30()
 805             for _c2 in range(trait_count):
 806                 trait_methods, p = parse_traits_info()
 807                 if class_id == searched_class_id:
 808                     method_names.update(trait_methods.items())
 809                     method_idxs.update(dict(
 810                         (idx, name)
 811                         for name, idx in trait_methods.items()))
 812
 813         # Scripts
 814         script_count, p = u30()
 815         for _c in range(script_count):
 816             _, p = u30()  # init
 817             trait_count, p = u30()
 818             for _c2 in range(trait_count):
 819                 _, p = parse_traits_info()
 820
 821         # Method bodies
 822         method_body_count, p = u30()
 823         Method = collections.namedtuple('Method', ['code', 'local_count'])
 824         methods = {}
 825         for _c in range(method_body_count):
 826             method_idx, p = u30()
 827             max_stack, p = u30()
 828             local_count, p = u30()
 829             init_scope_depth, p = u30()
 830             max_scope_depth, p = u30()
 831             code_length, p = u30()
 832             if method_idx in method_idxs:
 833                 m = Method(code_tag[p:p+code_length], local_count)
 834                 methods[method_idxs[method_idx]] = m
 835             p += code_length
 836             exception_count, p = u30()
 837             for _c2 in range(exception_count):
 838                 _, p = u30()  # from
 839                 _, p = u30()  # to
 840                 _, p = u30()  # target
 841                 _, p = u30()  # exc_type
 842                 _, p = u30()  # var_name
 843             trait_count, p = u30()
 844             for _c2 in range(trait_count):
 845                 _, p = parse_traits_info()
 846
 847         assert p == len(code_tag)
 848         assert len(methods) == len(method_idxs)
 849
 850         method_pyfunctions = {}
 851
 852         def extract_function(func_name):
 853             if func_name in method_pyfunctions:
 854                 return method_pyfunctions[func_name]
 855             if func_name not in methods:
 856                 raise ExtractorError(u'Cannot find function %r' % func_name)
 857             m = methods[func_name]
 858
 859             def resfunc(args):
 860                 print('Entering function %s(%r)' % (func_name, args))
 861                 registers = ['(this)'] + list(args) + [None] * m.local_count
 862                 stack = []
 863                 coder = io.BytesIO(m.code)
 864                 while True:
 865                     opcode = struct.unpack('!B', coder.read(1))[0]
 866                     if opcode == 208:  # getlocal_0
 867                         stack.append(registers[0])
 868                     elif opcode == 209:  # getlocal_1
 869                         stack.append(registers[1])
 870                     elif opcode == 210:  # getlocal_2
 871                         stack.append(registers[2])
 872                     elif opcode == 36:  # pushbyte
 873                         v = struct.unpack('!B', coder.read(1))[0]
 874                         stack.append(v)
 875                     elif opcode == 44:  # pushstring
 876                         idx = u30(coder)
 877                         stack.append(constant_strings[idx])
 878                     elif opcode == 48:  # pushscope
 879                         # We don't implement the scope register, so we'll just
 880                         # ignore the popped value
 881                         stack.pop()
 882                     elif opcode == 70:  # callproperty
 883                         index = u30(coder)
 884                         mname = multinames[index]
 885                         arg_count = u30(coder)
 886                         args = list(reversed(
 887                             [stack.pop() for _ in range(arg_count)]))
 888                         obj = stack.pop()
 889                         if mname == u'split':
 890                             assert len(args) == 1
 891                             assert isinstance(args[0], compat_str)
 892                             assert isinstance(obj, compat_str)
 893                             if args[0] == u'':
 894                                 res = list(obj)
 895                             else:
 896                                 res = obj.split(args[0])
 897                             stack.append(res)
 898                         elif mname in method_pyfunctions:
 899                             stack.append(method_pyfunctions[mname](args))
 900                         else:
 901                             raise NotImplementedError(
 902                                 u'Unsupported property %r on %r'
 903                                 % (mname, obj))
 904                     elif opcode == 93:  # findpropstrict
 905                         index = u30(coder)
 906                         mname = multinames[index]
 907                         res = extract_function(mname)
 908                         stack.append(res)
 909                     elif opcode == 97:  # setproperty
 910                         index = u30(coder)
 911                         value = stack.pop()
 912                         idx = stack.pop()
 913                         obj = stack.pop()
 914                         assert isinstance(obj, list)
 915                         assert isinstance(idx, int)
 916                         obj[idx] = value
 917                     elif opcode == 98:  # getlocal
 918                         index = u30(coder)
 919                         stack.append(registers[index])
 920                     elif opcode == 99:  # setlocal
 921                         index = u30(coder)
 922                         value = stack.pop()
 923                         registers[index] = value
 924                     elif opcode == 102:  # getproperty
 925                         index = u30(coder)
 926                         pname = multinames[index]
 927                         if pname == u'length':
 928                             obj = stack.pop()
 929                             assert isinstance(obj, list)
 930                             stack.append(len(obj))
 931                         else:  # Assume attribute access
 932                             idx = stack.pop()
 933                             assert isinstance(idx, int)
 934                             obj = stack.pop()
 935                             assert isinstance(obj, list)
 936                             stack.append(obj[idx])
 937                     elif opcode == 128:  # coerce
 938                         _ = u30(coder)
 939                     elif opcode == 133:  # coerce_s
 940                         assert isinstance(stack[-1], (type(None), compat_str))
 941                     elif opcode == 164:  # modulo
 942                         value2 = stack.pop()
 943                         value1 = stack.pop()
 944                         res = value1 % value2
 945                         stack.append(res)
 946                     elif opcode == 214:  # setlocal_2
 947                         registers[2] = stack.pop()
 948                     elif opcode == 215:  # setlocal_3
 949                         registers[3] = stack.pop()
 950                     else:
 951                         raise NotImplementedError(
 952                             u'Unsupported opcode %d' % opcode)
 953
 954             method_pyfunctions[func_name] = resfunc
 955             return resfunc
 956
 957         initial_function = extract_function(u'decipher')
 958         return lambda s: initial_function([s])
 959
 960     def _decrypt_signature(self, s, video_id, jsplayer_url, age_gate=False):
 961         """Turn the encrypted s field into a working signature"""
 962
 963         if jsplayer_url is not None:
 964             try:
 965                 if jsplayer_url not in self._jsplayer_cache:
 966                     self._jsplayer_cache[jsplayer_url] = self._extract_signature_function(
 967                         video_id, jsplayer_url
 968                     )
 969                 return self._jsplayer_cache[jsplayer_url]([s])
 970             except Exception as e:
 971                 tb = traceback.format_exc()
 972                 self._downloader.report_warning(u'Automatic signature extraction failed: ' + tb)
 973
 974         self._downloader.report_warning(u'Warning: Falling back to static signature algorithm')
 975
 976         if age_gate:
 977             # The videos with age protection use another player, so the
 978             # algorithms can be different.
 979             if len(s) == 86:
 980                 return s[2:63] + s[82] + s[64:82] + s[63]
 981
 982         if len(s) == 92:
 983             return s[25] + s[3:25] + s[0] + s[26:42] + s[79] + s[43:79] + s[91] + s[80:83]
 984         elif len(s) == 90:
 985             return s[25] + s[3:25] + s[2] + s[26:40] + s[77] + s[41:77] + s[89] + s[78:81]
 986         elif len(s) == 89:
 987             return s[84:78:-1] + s[87] + s[77:60:-1] + s[0] + s[59:3:-1]
 988         elif len(s) == 88:
 989             return s[7:28] + s[87] + s[29:45] + s[55] + s[46:55] + s[2] + s[56:87] + s[28]
 990         elif len(s) == 87:
 991             return s[6:27] + s[4] + s[28:39] + s[27] + s[40:59] + s[2] + s[60:]
 992         elif len(s) == 86:
 993             return s[5:34] + s[0] + s[35:38] + s[3] + s[39:45] + s[38] + s[46:53] + s[73] + s[54:73] + s[85] + s[74:85] + s[53]
 994         elif len(s) == 85:
 995             return s[3:11] + s[0] + s[12:55] + s[84] + s[56:84]
 996         elif len(s) == 84:
 997             return s[81:36:-1] + s[0] + s[35:2:-1]
 998         elif len(s) == 83:
 999             return s[81:64:-1] + s[82] + s[63:52:-1] + s[45] + s[51:45:-1] + s[1] + s[44:1:-1] + s[0]
1000         elif len(s) == 82:
1001             return s[80:73:-1] + s[81] + s[72:54:-1] + s[2] + s[53:43:-1] + s[0] + s[42:2:-1] + s[43] + s[1] + s[54]
1002         elif len(s) == 81:
1003             return s[56] + s[79:56:-1] + s[41] + s[55:41:-1] + s[80] + s[40:34:-1] + s[0] + s[33:29:-1] + s[34] + s[28:9:-1] + s[29] + s[8:0:-1] + s[9]
1004         elif len(s) == 80:
1005             return s[1:19] + s[0] + s[20:68] + s[19] + s[69:80]
1006         elif len(s) == 79:
1007             return s[54] + s[77:54:-1] + s[39] + s[53:39:-1] + s[78] + s[38:34:-1] + s[0] + s[33:29:-1] + s[34] + s[28:9:-1] + s[29] + s[8:0:-1] + s[9]
1008
1009         else:
1010             raise ExtractorError(u'Unable to decrypt signature, key length %d not supported; retrying might work' % (len(s)))
1011
1012     def _decrypt_signature_age_gate(self, s):
1013         # The videos with age protection use another player, so the algorithms
1014         # can be different.
1015         if len(s) == 86:
1016             return s[2:63] + s[82] + s[64:82] + s[63]
1017         else:
1018             # Fallback to the other algortihms
1019             return self._decrypt_signature(s)
1020
1021     def _get_available_subtitles(self, video_id):
1022         try:
1023             sub_list = self._download_webpage(
1024                 'http://video.google.com/timedtext?hl=en&type=list&v=%s' % video_id,
1025                 video_id, note=False)
1026         except ExtractorError as err:
1027             self._downloader.report_warning(u'unable to download video subtitles: %s' % compat_str(err))
1028             return {}
1029         lang_list = re.findall(r'name="([^"]*)"[^>]+lang_code="([\w\-]+)"', sub_list)
1030
1031         sub_lang_list = {}
1032         for l in lang_list:
1033             lang = l[1]
1034             params = compat_urllib_parse.urlencode({
1035                 'lang': lang,
1036                 'v': video_id,
1037                 'fmt': self._downloader.params.get('subtitlesformat'),
1038             })
1039             url = u'http://www.youtube.com/api/timedtext?' + params
1040             sub_lang_list[lang] = url
1041         if not sub_lang_list:
1042             self._downloader.report_warning(u'video doesn\'t have subtitles')
1043             return {}
1044         return sub_lang_list
1045
1046     def _get_available_automatic_caption(self, video_id, webpage):
1047         """We need the webpage for getting the captions url, pass it as an
1048            argument to speed up the process."""
1049         sub_format = self._downloader.params.get('subtitlesformat')
1050         self.to_screen(u'%s: Looking for automatic captions' % video_id)
1051         mobj = re.search(r';ytplayer.config = ({.*?});', webpage)
1052         err_msg = u'Couldn\'t find automatic captions for %s' % video_id
1053         if mobj is None:
1054             self._downloader.report_warning(err_msg)
1055             return {}
1056         player_config = json.loads(mobj.group(1))
1057         try:
1058             args = player_config[u'args']
1059             caption_url = args[u'ttsurl']
1060             timestamp = args[u'timestamp']
1061             # We get the available subtitles
1062             list_params = compat_urllib_parse.urlencode({
1063                 'type': 'list',
1064                 'tlangs': 1,
1065                 'asrs': 1,
1066             })
1067             list_url = caption_url + '&' + list_params
1068             list_page = self._download_webpage(list_url, video_id)
1069             caption_list = xml.etree.ElementTree.fromstring(list_page.encode('utf-8'))
1070             original_lang_node = caption_list.find('track')
1071             if original_lang_node.attrib.get('kind') != 'asr' :
1072                 self._downloader.report_warning(u'Video doesn\'t have automatic captions')
1073                 return {}
1074             original_lang = original_lang_node.attrib['lang_code']
1075
1076             sub_lang_list = {}
1077             for lang_node in caption_list.findall('target'):
1078                 sub_lang = lang_node.attrib['lang_code']
1079                 params = compat_urllib_parse.urlencode({
1080                     'lang': original_lang,
1081                     'tlang': sub_lang,
1082                     'fmt': sub_format,
1083                     'ts': timestamp,
1084                     'kind': 'asr',
1085                 })
1086                 sub_lang_list[sub_lang] = caption_url + '&' + params
1087             return sub_lang_list
1088         # An extractor error can be raise by the download process if there are
1089         # no automatic captions but there are subtitles
1090         except (KeyError, ExtractorError):
1091             self._downloader.report_warning(err_msg)
1092             return {}
1093
1094     def _print_formats(self, formats):
1095         print('Available formats:')
1096         for x in formats:
1097             print('%s\t:\t%s\t[%s]%s' %(x, self._video_extensions.get(x, 'flv'),
1098                                         self._video_dimensions.get(x, '???'),
1099                                         ' ('+self._special_itags[x]+')' if x in self._special_itags else ''))
1100
1101     def _extract_id(self, url):
1102         mobj = re.match(self._VALID_URL, url, re.VERBOSE)
1103         if mobj is None:
1104             raise ExtractorError(u'Invalid URL: %s' % url)
1105         video_id = mobj.group(2)
1106         return video_id
1107
1108     def _get_video_url_list(self, url_map):
1109         """
1110         Transform a dictionary in the format {itag:url} to a list of (itag, url)
1111         with the requested formats.
1112         """
1113         req_format = self._downloader.params.get('format', None)
1114         format_limit = self._downloader.params.get('format_limit', None)
1115         available_formats = self._available_formats_prefer_free if self._downloader.params.get('prefer_free_formats', False) else self._available_formats
1116         if format_limit is not None and format_limit in available_formats:
1117             format_list = available_formats[available_formats.index(format_limit):]
1118         else:
1119             format_list = available_formats
1120         existing_formats = [x for x in format_list if x in url_map]
1121         if len(existing_formats) == 0:
1122             raise ExtractorError(u'no known formats available for video')
1123         if self._downloader.params.get('listformats', None):
1124             self._print_formats(existing_formats)
1125             return
1126         if req_format is None or req_format == 'best':
1127             video_url_list = [(existing_formats[0], url_map[existing_formats[0]])] # Best quality
1128         elif req_format == 'worst':
1129             video_url_list = [(existing_formats[-1], url_map[existing_formats[-1]])] # worst quality
1130         elif req_format in ('-1', 'all'):
1131             video_url_list = [(f, url_map[f]) for f in existing_formats] # All formats
1132         else:
1133             # Specific formats. We pick the first in a slash-delimeted sequence.
1134             # Format can be specified as itag or 'mp4' or 'flv' etc. We pick the highest quality
1135             # available in the specified format. For example,
1136             # if '1/2/3/4' is requested and '2' and '4' are available, we pick '2'.
1137             # if '1/mp4/3/4' is requested and '1' and '5' (is a mp4) are available, we pick '1'.
1138             # if '1/mp4/3/4' is requested and '4' and '5' (is a mp4) are available, we pick '5'.
1139             req_formats = req_format.split('/')
1140             video_url_list = None
1141             for rf in req_formats:
1142                 if rf in url_map:
1143                     video_url_list = [(rf, url_map[rf])]
1144                     break
1145                 if rf in self._video_formats_map:
1146                     for srf in self._video_formats_map[rf]:
1147                         if srf in url_map:
1148                             video_url_list = [(srf, url_map[srf])]
1149                             break
1150                     else:
1151                         continue
1152                     break
1153             if video_url_list is None:
1154                 raise ExtractorError(u'requested format not available')
1155         return video_url_list
1156
1157     def _extract_from_m3u8(self, manifest_url, video_id):
1158         url_map = {}
1159         def _get_urls(_manifest):
1160             lines = _manifest.split('\n')
1161             urls = filter(lambda l: l and not l.startswith('#'),
1162                             lines)
1163             return urls
1164         manifest = self._download_webpage(manifest_url, video_id, u'Downloading formats manifest')
1165         formats_urls = _get_urls(manifest)
1166         for format_url in formats_urls:
1167             itag = self._search_regex(r'itag/(\d+?)/', format_url, 'itag')
1168             url_map[itag] = format_url
1169         return url_map
1170
1171     def _real_extract(self, url):
1172         if re.match(r'(?:https?://)?[^/]+/watch\?feature=[a-z_]+$', url):
1173             self._downloader.report_warning(u'Did you forget to quote the URL? Remember that & is a meta-character in most shells, so you want to put the URL in quotes, like  youtube-dl \'http://www.youtube.com/watch?feature=foo&v=BaW_jenozKc\' (or simply  youtube-dl BaW_jenozKc  ).')
1174
1175         # Extract original video URL from URL with redirection, like age verification, using next_url parameter
1176         mobj = re.search(self._NEXT_URL_RE, url)
1177         if mobj:
1178             url = 'https://www.youtube.com/' + compat_urllib_parse.unquote(mobj.group(1)).lstrip('/')
1179         video_id = self._extract_id(url)
1180
1181         # Get video webpage
1182         self.report_video_webpage_download(video_id)
1183         url = 'https://www.youtube.com/watch?v=%s&gl=US&hl=en&has_verified=1' % video_id
1184         request = compat_urllib_request.Request(url)
1185         try:
1186             video_webpage_bytes = compat_urllib_request.urlopen(request).read()
1187         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
1188             raise ExtractorError(u'Unable to download video webpage: %s' % compat_str(err))
1189
1190         video_webpage = video_webpage_bytes.decode('utf-8', 'ignore')
1191
1192         # Attempt to extract SWF player URL
1193         mobj = re.search(r'swfConfig.*?"(https?:\\/\\/.*?watch.*?-.*?\.swf)"', video_webpage)
1194         if mobj is not None:
1195             player_url = re.sub(r'\\(.)', r'\1', mobj.group(1))
1196         else:
1197             player_url = None
1198
1199         # Get video info
1200         self.report_video_info_webpage_download(video_id)
1201         if re.search(r'player-age-gate-content">', video_webpage) is not None:
1202             self.report_age_confirmation()
1203             age_gate = True
1204             # We simulate the access to the video from www.youtube.com/v/{video_id}
1205             # this can be viewed without login into Youtube
1206             data = compat_urllib_parse.urlencode({'video_id': video_id,
1207                                                   'el': 'embedded',
1208                                                   'gl': 'US',
1209                                                   'hl': 'en',
1210                                                   'eurl': 'https://youtube.googleapis.com/v/' + video_id,
1211                                                   'asv': 3,
1212                                                   'sts':'1588',
1213                                                   })
1214             video_info_url = 'https://www.youtube.com/get_video_info?' + data
1215             video_info_webpage = self._download_webpage(video_info_url, video_id,
1216                                     note=False,
1217                                     errnote='unable to download video info webpage')
1218             video_info = compat_parse_qs(video_info_webpage)
1219         else:
1220             age_gate = False
1221             for el_type in ['&el=embedded', '&el=detailpage', '&el=vevo', '']:
1222                 video_info_url = ('https://www.youtube.com/get_video_info?&video_id=%s%s&ps=default&eurl=&gl=US&hl=en'
1223                         % (video_id, el_type))
1224                 video_info_webpage = self._download_webpage(video_info_url, video_id,
1225                                         note=False,
1226                                         errnote='unable to download video info webpage')
1227                 video_info = compat_parse_qs(video_info_webpage)
1228                 if 'token' in video_info:
1229                     break
1230         if 'token' not in video_info:
1231             if 'reason' in video_info:
1232                 raise ExtractorError(u'YouTube said: %s' % video_info['reason'][0], expected=True)
1233             else:
1234                 raise ExtractorError(u'"token" parameter not in video info for unknown reason')
1235
1236         # Check for "rental" videos
1237         if 'ypc_video_rental_bar_text' in video_info and 'author' not in video_info:
1238             raise ExtractorError(u'"rental" videos not supported')
1239
1240         # Start extracting information
1241         self.report_information_extraction(video_id)
1242
1243         # uploader
1244         if 'author' not in video_info:
1245             raise ExtractorError(u'Unable to extract uploader name')
1246         video_uploader = compat_urllib_parse.unquote_plus(video_info['author'][0])
1247
1248         # uploader_id
1249         video_uploader_id = None
1250         mobj = re.search(r'<link itemprop="url" href="http://www.youtube.com/(?:user|channel)/([^"]+)">', video_webpage)
1251         if mobj is not None:
1252             video_uploader_id = mobj.group(1)
1253         else:
1254             self._downloader.report_warning(u'unable to extract uploader nickname')
1255
1256         # title
1257         if 'title' not in video_info:
1258             raise ExtractorError(u'Unable to extract video title')
1259         video_title = compat_urllib_parse.unquote_plus(video_info['title'][0])
1260
1261         # thumbnail image
1262         # We try first to get a high quality image:
1263         m_thumb = re.search(r'<span itemprop="thumbnail".*?href="(.*?)">',
1264                             video_webpage, re.DOTALL)
1265         if m_thumb is not None:
1266             video_thumbnail = m_thumb.group(1)
1267         elif 'thumbnail_url' not in video_info:
1268             self._downloader.report_warning(u'unable to extract video thumbnail')
1269             video_thumbnail = ''
1270         else:   # don't panic if we can't find it
1271             video_thumbnail = compat_urllib_parse.unquote_plus(video_info['thumbnail_url'][0])
1272
1273         # upload date
1274         upload_date = None
1275         mobj = re.search(r'id="eow-date.*?>(.*?)</span>', video_webpage, re.DOTALL)
1276         if mobj is not None:
1277             upload_date = ' '.join(re.sub(r'[/,-]', r' ', mobj.group(1)).split())
1278             upload_date = unified_strdate(upload_date)
1279
1280         # description
1281         video_description = get_element_by_id("eow-description", video_webpage)
1282         if video_description:
1283             video_description = clean_html(video_description)
1284         else:
1285             fd_mobj = re.search(r'<meta name="description" content="([^"]+)"', video_webpage)
1286             if fd_mobj:
1287                 video_description = unescapeHTML(fd_mobj.group(1))
1288             else:
1289                 video_description = u''
1290
1291         # subtitles
1292         video_subtitles = self.extract_subtitles(video_id, video_webpage)
1293
1294         if self._downloader.params.get('listsubtitles', False):
1295             self._list_available_subtitles(video_id, video_webpage)
1296             return
1297
1298         if 'length_seconds' not in video_info:
1299             self._downloader.report_warning(u'unable to extract video duration')
1300             video_duration = ''
1301         else:
1302             video_duration = compat_urllib_parse.unquote_plus(video_info['length_seconds'][0])
1303
1304         # Decide which formats to download
1305
1306         try:
1307             mobj = re.search(r';ytplayer.config = ({.*?});', video_webpage)
1308             if not mobj:
1309                 raise ValueError('Could not find vevo ID')
1310             info = json.loads(mobj.group(1))
1311             args = info['args']
1312             # Easy way to know if the 's' value is in url_encoded_fmt_stream_map
1313             # this signatures are encrypted
1314             m_s = re.search(r'[&,]s=', args['url_encoded_fmt_stream_map'])
1315             if m_s is not None:
1316                 self.to_screen(u'%s: Encrypted signatures detected.' % video_id)
1317                 video_info['url_encoded_fmt_stream_map'] = [args['url_encoded_fmt_stream_map']]
1318             m_s = re.search(r'[&,]s=', args.get('adaptive_fmts', u''))
1319             if m_s is not None:
1320                 if 'url_encoded_fmt_stream_map' in video_info:
1321                     video_info['url_encoded_fmt_stream_map'][0] += ',' + args['adaptive_fmts']
1322                 else:
1323                     video_info['url_encoded_fmt_stream_map'] = [args['adaptive_fmts']]
1324             elif 'adaptive_fmts' in video_info:
1325                 if 'url_encoded_fmt_stream_map' in video_info:
1326                     video_info['url_encoded_fmt_stream_map'][0] += ',' + video_info['adaptive_fmts'][0]
1327                 else:
1328                     video_info['url_encoded_fmt_stream_map'] = video_info['adaptive_fmts']
1329         except ValueError:
1330             pass
1331
1332         if 'conn' in video_info and video_info['conn'][0].startswith('rtmp'):
1333             self.report_rtmp_download()
1334             video_url_list = [(None, video_info['conn'][0])]
1335         elif 'url_encoded_fmt_stream_map' in video_info and len(video_info['url_encoded_fmt_stream_map']) >= 1:
1336             if 'rtmpe%3Dyes' in video_info['url_encoded_fmt_stream_map'][0]:
1337                 raise ExtractorError('rtmpe downloads are not supported, see https://github.com/rg3/youtube-dl/issues/343 for more information.', expected=True)
1338             url_map = {}
1339             for url_data_str in video_info['url_encoded_fmt_stream_map'][0].split(','):
1340                 url_data = compat_parse_qs(url_data_str)
1341                 if 'itag' in url_data and 'url' in url_data:
1342                     url = url_data['url'][0]
1343                     if 'sig' in url_data:
1344                         url += '&signature=' + url_data['sig'][0]
1345                     elif 's' in url_data:
1346                         encrypted_sig = url_data['s'][0]
1347                         if self._downloader.params.get('verbose'):
1348                             if age_gate:
1349                                 player_version = self._search_regex(r'-(.+)\.swf$',
1350                                     player_url if player_url else 'NOT FOUND',
1351                                     'flash player', fatal=False)
1352                                 player_desc = 'flash player %s' % player_version
1353                             else:
1354                                 player_version = self._search_regex(r'html5player-(.+?)\.js', video_webpage,
1355                                     'html5 player', fatal=False)
1356                                 player_desc = u'html5 player %s' % player_version
1357
1358                             parts_sizes = u'.'.join(compat_str(len(part)) for part in encrypted_sig.split('.'))
1359                             self.to_screen(u'encrypted signature length %d (%s), itag %s, %s' %
1360                                 (len(encrypted_sig), parts_sizes, url_data['itag'][0], player_desc))
1361
1362                         if age_gate:
1363                             jsplayer_url = None
1364                         else:
1365                             jsplayer_url_json = self._search_regex(
1366                                 r'"assets":.+?"js":\s*("[^"]+")',
1367                                 video_webpage, u'JS player URL')
1368                             jsplayer_url = json.loads(jsplayer_url_json)
1369
1370                         signature = self._decrypt_signature(encrypted_sig, video_id, jsplayer_url, age_gate)
1371                         url += '&signature=' + signature
1372                     if 'ratebypass' not in url:
1373                         url += '&ratebypass=yes'
1374                     url_map[url_data['itag'][0]] = url
1375             video_url_list = self._get_video_url_list(url_map)
1376             if not video_url_list:
1377                 return
1378         elif video_info.get('hlsvp'):
1379             manifest_url = video_info['hlsvp'][0]
1380             url_map = self._extract_from_m3u8(manifest_url, video_id)
1381             video_url_list = self._get_video_url_list(url_map)
1382             if not video_url_list:
1383                 return
1384
1385         else:
1386             raise ExtractorError(u'no conn or url_encoded_fmt_stream_map information found in video info')
1387
1388         results = []
1389         for format_param, video_real_url in video_url_list:
1390             # Extension
1391             video_extension = self._video_extensions.get(format_param, 'flv')
1392
1393             video_format = '{0} - {1}{2}'.format(format_param if format_param else video_extension,
1394                                               self._video_dimensions.get(format_param, '???'),
1395                                               ' ('+self._special_itags[format_param]+')' if format_param in self._special_itags else '')
1396
1397             results.append({
1398                 'id':       video_id,
1399                 'url':      video_real_url,
1400                 'uploader': video_uploader,
1401                 'uploader_id': video_uploader_id,
1402                 'upload_date':  upload_date,
1403                 'title':    video_title,
1404                 'ext':      video_extension,
1405                 'format':   video_format,
1406                 'thumbnail':    video_thumbnail,
1407                 'description':  video_description,
1408                 'player_url':   player_url,
1409                 'subtitles':    video_subtitles,
1410                 'duration':     video_duration
1411             })
1412         return results
1413
1414 class YoutubePlaylistIE(InfoExtractor):
1415     IE_DESC = u'YouTube.com playlists'
1416     _VALID_URL = r"""(?:
1417                         (?:https?://)?
1418                         (?:\w+\.)?
1419                         youtube\.com/
1420                         (?:
1421                            (?:course|view_play_list|my_playlists|artist|playlist|watch)
1422                            \? (?:.*?&)*? (?:p|a|list)=
1423                         |  p/
1424                         )
1425                         ((?:PL|EC|UU|FL)?[0-9A-Za-z-_]{10,})
1426                         .*
1427                      |
1428                         ((?:PL|EC|UU|FL)[0-9A-Za-z-_]{10,})
1429                      )"""
1430     _TEMPLATE_URL = 'https://gdata.youtube.com/feeds/api/playlists/%s?max-results=%i&start-index=%i&v=2&alt=json&safeSearch=none'
1431     _MAX_RESULTS = 50
1432     IE_NAME = u'youtube:playlist'
1433
1434     @classmethod
1435     def suitable(cls, url):
1436         """Receives a URL and returns True if suitable for this IE."""
1437         return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
1438
1439     def _real_extract(self, url):
1440         # Extract playlist id
1441         mobj = re.match(self._VALID_URL, url, re.VERBOSE)
1442         if mobj is None:
1443             raise ExtractorError(u'Invalid URL: %s' % url)
1444
1445         # Download playlist videos from API
1446         playlist_id = mobj.group(1) or mobj.group(2)
1447         videos = []
1448
1449         for page_num in itertools.count(1):
1450             start_index = self._MAX_RESULTS * (page_num - 1) + 1
1451             if start_index >= 1000:
1452                 self._downloader.report_warning(u'Max number of results reached')
1453                 break
1454             url = self._TEMPLATE_URL % (playlist_id, self._MAX_RESULTS, start_index)
1455             page = self._download_webpage(url, playlist_id, u'Downloading page #%s' % page_num)
1456
1457             try:
1458                 response = json.loads(page)
1459             except ValueError as err:
1460                 raise ExtractorError(u'Invalid JSON in API response: ' + compat_str(err))
1461
1462             if 'feed' not in response:
1463                 raise ExtractorError(u'Got a malformed response from YouTube API')
1464             playlist_title = response['feed']['title']['$t']
1465             if 'entry' not in response['feed']:
1466                 # Number of videos is a multiple of self._MAX_RESULTS
1467                 break
1468
1469             for entry in response['feed']['entry']:
1470                 index = entry['yt$position']['$t']
1471                 if 'media$group' in entry and 'yt$videoid' in entry['media$group']:
1472                     videos.append((
1473                         index,
1474                         'https://www.youtube.com/watch?v=' + entry['media$group']['yt$videoid']['$t']
1475                     ))
1476
1477         videos = [v[1] for v in sorted(videos)]
1478
1479         url_results = [self.url_result(vurl, 'Youtube') for vurl in videos]
1480         return [self.playlist_result(url_results, playlist_id, playlist_title)]
1481
1482
1483 class YoutubeChannelIE(InfoExtractor):
1484     IE_DESC = u'YouTube.com channels'
1485     _VALID_URL = r"^(?:https?://)?(?:youtu\.be|(?:\w+\.)?youtube(?:-nocookie)?\.com)/channel/([0-9A-Za-z_-]+)"
1486     _TEMPLATE_URL = 'http://www.youtube.com/channel/%s/videos?sort=da&flow=list&view=0&page=%s&gl=US&hl=en'
1487     _MORE_PAGES_INDICATOR = 'yt-uix-load-more'
1488     _MORE_PAGES_URL = 'http://www.youtube.com/c4_browse_ajax?action_load_more_videos=1&flow=list&paging=%s&view=0&sort=da&channel_id=%s'
1489     IE_NAME = u'youtube:channel'
1490
1491     def extract_videos_from_page(self, page):
1492         ids_in_page = []
1493         for mobj in re.finditer(r'href="/watch\?v=([0-9A-Za-z_-]+)&?', page):
1494             if mobj.group(1) not in ids_in_page:
1495                 ids_in_page.append(mobj.group(1))
1496         return ids_in_page
1497
1498     def _real_extract(self, url):
1499         # Extract channel id
1500         mobj = re.match(self._VALID_URL, url)
1501         if mobj is None:
1502             raise ExtractorError(u'Invalid URL: %s' % url)
1503
1504         # Download channel page
1505         channel_id = mobj.group(1)
1506         video_ids = []
1507         pagenum = 1
1508
1509         url = self._TEMPLATE_URL % (channel_id, pagenum)
1510         page = self._download_webpage(url, channel_id,
1511                                       u'Downloading page #%s' % pagenum)
1512
1513         # Extract video identifiers
1514         ids_in_page = self.extract_videos_from_page(page)
1515         video_ids.extend(ids_in_page)
1516
1517         # Download any subsequent channel pages using the json-based channel_ajax query
1518         if self._MORE_PAGES_INDICATOR in page:
1519             for pagenum in itertools.count(1):
1520                 url = self._MORE_PAGES_URL % (pagenum, channel_id)
1521                 page = self._download_webpage(url, channel_id,
1522                                               u'Downloading page #%s' % pagenum)
1523
1524                 page = json.loads(page)
1525
1526                 ids_in_page = self.extract_videos_from_page(page['content_html'])
1527                 video_ids.extend(ids_in_page)
1528
1529                 if self._MORE_PAGES_INDICATOR  not in page['load_more_widget_html']:
1530                     break
1531
1532         self._downloader.to_screen(u'[youtube] Channel %s: Found %i videos' % (channel_id, len(video_ids)))
1533
1534         urls = ['http://www.youtube.com/watch?v=%s' % id for id in video_ids]
1535         url_entries = [self.url_result(eurl, 'Youtube') for eurl in urls]
1536         return [self.playlist_result(url_entries, channel_id)]
1537
1538
1539 class YoutubeUserIE(InfoExtractor):
1540     IE_DESC = u'YouTube.com user videos (URL or "ytuser" keyword)'
1541     _VALID_URL = r'(?:(?:(?:https?://)?(?:\w+\.)?youtube\.com/(?:user/)?)|ytuser:)(?!feed/)([A-Za-z0-9_-]+)'
1542     _TEMPLATE_URL = 'http://gdata.youtube.com/feeds/api/users/%s'
1543     _GDATA_PAGE_SIZE = 50
1544     _GDATA_URL = 'http://gdata.youtube.com/feeds/api/users/%s/uploads?max-results=%d&start-index=%d&alt=json'
1545     IE_NAME = u'youtube:user'
1546
1547     @classmethod
1548     def suitable(cls, url):
1549         # Don't return True if the url can be extracted with other youtube
1550         # extractor, the regex would is too permissive and it would match.
1551         other_ies = iter(klass for (name, klass) in globals().items() if name.endswith('IE') and klass is not cls)
1552         if any(ie.suitable(url) for ie in other_ies): return False
1553         else: return super(YoutubeUserIE, cls).suitable(url)
1554
1555     def _real_extract(self, url):
1556         # Extract username
1557         mobj = re.match(self._VALID_URL, url)
1558         if mobj is None:
1559             raise ExtractorError(u'Invalid URL: %s' % url)
1560
1561         username = mobj.group(1)
1562
1563         # Download video ids using YouTube Data API. Result size per
1564         # query is limited (currently to 50 videos) so we need to query
1565         # page by page until there are no video ids - it means we got
1566         # all of them.
1567
1568         video_ids = []
1569
1570         for pagenum in itertools.count(0):
1571             start_index = pagenum * self._GDATA_PAGE_SIZE + 1
1572
1573             gdata_url = self._GDATA_URL % (username, self._GDATA_PAGE_SIZE, start_index)
1574             page = self._download_webpage(gdata_url, username,
1575                                           u'Downloading video ids from %d to %d' % (start_index, start_index + self._GDATA_PAGE_SIZE))
1576
1577             try:
1578                 response = json.loads(page)
1579             except ValueError as err:
1580                 raise ExtractorError(u'Invalid JSON in API response: ' + compat_str(err))
1581             if 'entry' not in response['feed']:
1582                 # Number of videos is a multiple of self._MAX_RESULTS
1583                 break
1584
1585             # Extract video identifiers
1586             ids_in_page = []
1587             for entry in response['feed']['entry']:
1588                 ids_in_page.append(entry['id']['$t'].split('/')[-1])
1589             video_ids.extend(ids_in_page)
1590
1591             # A little optimization - if current page is not
1592             # "full", ie. does not contain PAGE_SIZE video ids then
1593             # we can assume that this page is the last one - there
1594             # are no more ids on further pages - no need to query
1595             # again.
1596
1597             if len(ids_in_page) < self._GDATA_PAGE_SIZE:
1598                 break
1599
1600         urls = ['http://www.youtube.com/watch?v=%s' % video_id for video_id in video_ids]
1601         url_results = [self.url_result(rurl, 'Youtube') for rurl in urls]
1602         return [self.playlist_result(url_results, playlist_title = username)]
1603
1604 class YoutubeSearchIE(SearchInfoExtractor):
1605     IE_DESC = u'YouTube.com searches'
1606     _API_URL = 'https://gdata.youtube.com/feeds/api/videos?q=%s&start-index=%i&max-results=50&v=2&alt=jsonc'
1607     _MAX_RESULTS = 1000
1608     IE_NAME = u'youtube:search'
1609     _SEARCH_KEY = 'ytsearch'
1610
1611     def report_download_page(self, query, pagenum):
1612         """Report attempt to download search page with given number."""
1613         self._downloader.to_screen(u'[youtube] query "%s": Downloading page %s' % (query, pagenum))
1614
1615     def _get_n_results(self, query, n):
1616         """Get a specified number of results for a query"""
1617
1618         video_ids = []
1619         pagenum = 0
1620         limit = n
1621
1622         while (50 * pagenum) < limit:
1623             self.report_download_page(query, pagenum+1)
1624             result_url = self._API_URL % (compat_urllib_parse.quote_plus(query), (50*pagenum)+1)
1625             request = compat_urllib_request.Request(result_url)
1626             try:
1627                 data = compat_urllib_request.urlopen(request).read().decode('utf-8')
1628             except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
1629                 raise ExtractorError(u'Unable to download API page: %s' % compat_str(err))
1630             api_response = json.loads(data)['data']
1631
1632             if not 'items' in api_response:
1633                 raise ExtractorError(u'[youtube] No video results')
1634
1635             new_ids = list(video['id'] for video in api_response['items'])
1636             video_ids += new_ids
1637
1638             limit = min(n, api_response['totalItems'])
1639             pagenum += 1
1640
1641         if len(video_ids) > n:
1642             video_ids = video_ids[:n]
1643         videos = [self.url_result('http://www.youtube.com/watch?v=%s' % id, 'Youtube') for id in video_ids]
1644         return self.playlist_result(videos, query)
1645
1646
1647 class YoutubeShowIE(InfoExtractor):
1648     IE_DESC = u'YouTube.com (multi-season) shows'
1649     _VALID_URL = r'https?://www\.youtube\.com/show/(.*)'
1650     IE_NAME = u'youtube:show'
1651
1652     def _real_extract(self, url):
1653         mobj = re.match(self._VALID_URL, url)
1654         show_name = mobj.group(1)
1655         webpage = self._download_webpage(url, show_name, u'Downloading show webpage')
1656         # There's one playlist for each season of the show
1657         m_seasons = list(re.finditer(r'href="(/playlist\?list=.*?)"', webpage))
1658         self.to_screen(u'%s: Found %s seasons' % (show_name, len(m_seasons)))
1659         return [self.url_result('https://www.youtube.com' + season.group(1), 'YoutubePlaylist') for season in m_seasons]
1660
1661
1662 class YoutubeFeedsInfoExtractor(YoutubeBaseInfoExtractor):
1663     """
1664     Base class for extractors that fetch info from
1665     http://www.youtube.com/feed_ajax
1666     Subclasses must define the _FEED_NAME and _PLAYLIST_TITLE properties.
1667     """
1668     _LOGIN_REQUIRED = True
1669     _PAGING_STEP = 30
1670     # use action_load_personal_feed instead of action_load_system_feed
1671     _PERSONAL_FEED = False
1672
1673     @property
1674     def _FEED_TEMPLATE(self):
1675         action = 'action_load_system_feed'
1676         if self._PERSONAL_FEED:
1677             action = 'action_load_personal_feed'
1678         return 'http://www.youtube.com/feed_ajax?%s=1&feed_name=%s&paging=%%s' % (action, self._FEED_NAME)
1679
1680     @property
1681     def IE_NAME(self):
1682         return u'youtube:%s' % self._FEED_NAME
1683
1684     def _real_initialize(self):
1685         self._login()
1686
1687     def _real_extract(self, url):
1688         feed_entries = []
1689         # The step argument is available only in 2.7 or higher
1690         for i in itertools.count(0):
1691             paging = i*self._PAGING_STEP
1692             info = self._download_webpage(self._FEED_TEMPLATE % paging,
1693                                           u'%s feed' % self._FEED_NAME,
1694                                           u'Downloading page %s' % i)
1695             info = json.loads(info)
1696             feed_html = info['feed_html']
1697             m_ids = re.finditer(r'"/watch\?v=(.*?)["&]', feed_html)
1698             ids = orderedSet(m.group(1) for m in m_ids)
1699             feed_entries.extend(self.url_result(id, 'Youtube') for id in ids)
1700             if info['paging'] is None:
1701                 break
1702         return self.playlist_result(feed_entries, playlist_title=self._PLAYLIST_TITLE)
1703
1704 class YoutubeSubscriptionsIE(YoutubeFeedsInfoExtractor):
1705     IE_DESC = u'YouTube.com subscriptions feed, "ytsubs" keyword(requires authentication)'
1706     _VALID_URL = r'https?://www\.youtube\.com/feed/subscriptions|:ytsubs(?:criptions)?'
1707     _FEED_NAME = 'subscriptions'
1708     _PLAYLIST_TITLE = u'Youtube Subscriptions'
1709
1710 class YoutubeRecommendedIE(YoutubeFeedsInfoExtractor):
1711     IE_DESC = u'YouTube.com recommended videos, "ytrec" keyword (requires authentication)'
1712     _VALID_URL = r'https?://www\.youtube\.com/feed/recommended|:ytrec(?:ommended)?'
1713     _FEED_NAME = 'recommended'
1714     _PLAYLIST_TITLE = u'Youtube Recommended videos'
1715
1716 class YoutubeWatchLaterIE(YoutubeFeedsInfoExtractor):
1717     IE_DESC = u'Youtube watch later list, "ytwatchlater" keyword (requires authentication)'
1718     _VALID_URL = r'https?://www\.youtube\.com/feed/watch_later|:ytwatchlater'
1719     _FEED_NAME = 'watch_later'
1720     _PLAYLIST_TITLE = u'Youtube Watch Later'
1721     _PAGING_STEP = 100
1722     _PERSONAL_FEED = True
1723
1724 class YoutubeFavouritesIE(YoutubeBaseInfoExtractor):
1725     IE_NAME = u'youtube:favorites'
1726     IE_DESC = u'YouTube.com favourite videos, "ytfav" keyword (requires authentication)'
1727     _VALID_URL = r'https?://www\.youtube\.com/my_favorites|:ytfav(?:ou?rites)?'
1728     _LOGIN_REQUIRED = True
1729
1730     def _real_extract(self, url):
1731         webpage = self._download_webpage('https://www.youtube.com/my_favorites', 'Youtube Favourites videos')
1732         playlist_id = self._search_regex(r'list=(.+?)["&]', webpage, u'favourites playlist id')
1733         return self.url_result(playlist_id, 'YoutubePlaylist')