youtube_dl/extractor/youtube.py

   1 # coding: utf-8
   2
   3 import collections
   4 import errno
   5 import io
   6 import itertools
   7 import json
   8 import os.path
   9 import re
  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_chr,
  19     compat_parse_qs,
  20     compat_urllib_parse,
  21     compat_urllib_request,
  22     compat_urlparse,
  23     compat_str,
  24
  25     clean_html,
  26     get_cachedir,
  27     get_element_by_id,
  28     get_element_by_attribute,
  29     ExtractorError,
  30     unescapeHTML,
  31     unified_strdate,
  32     orderedSet,
  33     write_json_file,
  34 )
  35
  36 class YoutubeBaseInfoExtractor(InfoExtractor):
  37     """Provide base functions for Youtube extractors"""
  38     _LOGIN_URL = 'https://accounts.google.com/ServiceLogin'
  39     _LANG_URL = r'https://www.youtube.com/?hl=en&persist_hl=1&gl=US&persist_gl=1&opt_out_ackd=1'
  40     _AGE_URL = 'http://www.youtube.com/verify_age?next_url=/&gl=US&hl=en'
  41     _NETRC_MACHINE = 'youtube'
  42     # If True it will raise an error if no login info is provided
  43     _LOGIN_REQUIRED = False
  44
  45     def _set_language(self):
  46         return bool(self._download_webpage(
  47             self._LANG_URL, None,
  48             note=u'Setting language', errnote='unable to set language',
  49             fatal=False))
  50
  51     def _login(self):
  52         (username, password) = self._get_login_info()
  53         # No authentication to be performed
  54         if username is None:
  55             if self._LOGIN_REQUIRED:
  56                 raise ExtractorError(u'No login info available, needed for using %s.' % self.IE_NAME, expected=True)
  57             return False
  58
  59         login_page = self._download_webpage(
  60             self._LOGIN_URL, None,
  61             note=u'Downloading login page',
  62             errnote=u'unable to fetch login page', fatal=False)
  63         if login_page is False:
  64             return
  65
  66         galx = self._search_regex(r'(?s)<input.+?name="GALX".+?value="(.+?)"',
  67                                   login_page, u'Login GALX parameter')
  68
  69         # Log in
  70         login_form_strs = {
  71                 u'continue': u'https://www.youtube.com/signin?action_handle_signin=true&feature=sign_in_button&hl=en_US&nomobiletemp=1',
  72                 u'Email': username,
  73                 u'GALX': galx,
  74                 u'Passwd': password,
  75                 u'PersistentCookie': u'yes',
  76                 u'_utf8': u'霱',
  77                 u'bgresponse': u'js_disabled',
  78                 u'checkConnection': u'',
  79                 u'checkedDomains': u'youtube',
  80                 u'dnConn': u'',
  81                 u'pstMsg': u'0',
  82                 u'rmShown': u'1',
  83                 u'secTok': u'',
  84                 u'signIn': u'Sign in',
  85                 u'timeStmp': u'',
  86                 u'service': u'youtube',
  87                 u'uilel': u'3',
  88                 u'hl': u'en_US',
  89         }
  90         # Convert to UTF-8 *before* urlencode because Python 2.x's urlencode
  91         # chokes on unicode
  92         login_form = dict((k.encode('utf-8'), v.encode('utf-8')) for k,v in login_form_strs.items())
  93         login_data = compat_urllib_parse.urlencode(login_form).encode('ascii')
  94
  95         req = compat_urllib_request.Request(self._LOGIN_URL, login_data)
  96         login_results = self._download_webpage(
  97             req, None,
  98             note=u'Logging in', errnote=u'unable to log in', fatal=False)
  99         if login_results is False:
 100             return False
 101         if re.search(r'(?i)<form[^>]* id="gaia_loginform"', login_results) is not None:
 102             self._downloader.report_warning(u'unable to log in: bad username or password')
 103             return False
 104         return True
 105
 106     def _confirm_age(self):
 107         age_form = {
 108             'next_url': '/',
 109             'action_confirm': 'Confirm',
 110         }
 111         req = compat_urllib_request.Request(self._AGE_URL, compat_urllib_parse.urlencode(age_form))
 112
 113         self._download_webpage(
 114             req, None,
 115             note=u'Confirming age', errnote=u'Unable to confirm age')
 116         return True
 117
 118     def _real_initialize(self):
 119         if self._downloader is None:
 120             return
 121         if not self._set_language():
 122             return
 123         if not self._login():
 124             return
 125         self._confirm_age()
 126
 127
 128 class YoutubeIE(YoutubeBaseInfoExtractor, SubtitlesInfoExtractor):
 129     IE_DESC = u'YouTube.com'
 130     _VALID_URL = r"""(?x)^
 131                      (
 132                          (?:https?://|//)?                                    # http(s):// or protocol-independent URL (optional)
 133                          (?:(?:(?:(?:\w+\.)?[yY][oO][uU][tT][uU][bB][eE](?:-nocookie)?\.com/|
 134                             tube\.majestyc\.net/|
 135                             youtube\.googleapis\.com/)                        # the various hostnames, with wildcard subdomains
 136                          (?:.*?\#/)?                                          # handle anchor (#/) redirect urls
 137                          (?:                                                  # the various things that can precede the ID:
 138                              (?:(?:v|embed|e)/)                               # v/ or embed/ or e/
 139                              |(?:                                             # or the v= param in all its forms
 140                                  (?:(?:watch|movie)(?:_popup)?(?:\.php)?)?    # preceding watch(_popup|.php) or nothing (like /?v=xxxx)
 141                                  (?:\?|\#!?)                                  # the params delimiter ? or # or #!
 142                                  (?:.*?&)?                                    # any other preceding param (like /?s=tuff&v=xxxx)
 143                                  v=
 144                              )
 145                          ))
 146                          |youtu\.be/                                          # just youtu.be/xxxx
 147                          )
 148                      )?                                                       # all until now is optional -> you can pass the naked ID
 149                      ([0-9A-Za-z_-]{11})                                      # here is it! the YouTube video ID
 150                      (?(1).+)?                                                # if we found the ID, everything can follow
 151                      $"""
 152     _NEXT_URL_RE = r'[\?&]next_url=([^&]+)'
 153     _formats = {
 154         '5': {'ext': 'flv', 'width': 400, 'height': 240},
 155         '6': {'ext': 'flv', 'width': 450, 'height': 270},
 156         '13': {'ext': '3gp'},
 157         '17': {'ext': '3gp', 'width': 176, 'height': 144},
 158         '18': {'ext': 'mp4', 'width': 640, 'height': 360},
 159         '22': {'ext': 'mp4', 'width': 1280, 'height': 720},
 160         '34': {'ext': 'flv', 'width': 640, 'height': 360},
 161         '35': {'ext': 'flv', 'width': 854, 'height': 480},
 162         '36': {'ext': '3gp', 'width': 320, 'height': 240},
 163         '37': {'ext': 'mp4', 'width': 1920, 'height': 1080},
 164         '38': {'ext': 'mp4', 'width': 4096, 'height': 3072},
 165         '43': {'ext': 'webm', 'width': 640, 'height': 360},
 166         '44': {'ext': 'webm', 'width': 854, 'height': 480},
 167         '45': {'ext': 'webm', 'width': 1280, 'height': 720},
 168         '46': {'ext': 'webm', 'width': 1920, 'height': 1080},
 169
 170
 171         # 3d videos
 172         '82': {'ext': 'mp4', 'height': 360, 'resolution': '360p', 'format_note': '3D', 'preference': -20},
 173         '83': {'ext': 'mp4', 'height': 480, 'resolution': '480p', 'format_note': '3D', 'preference': -20},
 174         '84': {'ext': 'mp4', 'height': 720, 'resolution': '720p', 'format_note': '3D', 'preference': -20},
 175         '85': {'ext': 'mp4', 'height': 1080, 'resolution': '1080p', 'format_note': '3D', 'preference': -20},
 176         '100': {'ext': 'webm', 'height': 360, 'resolution': '360p', 'format_note': '3D', 'preference': -20},
 177         '101': {'ext': 'webm', 'height': 480, 'resolution': '480p', 'format_note': '3D', 'preference': -20},
 178         '102': {'ext': 'webm', 'height': 720, 'resolution': '720p', 'format_note': '3D', 'preference': -20},
 179
 180         # Apple HTTP Live Streaming
 181         '92': {'ext': 'mp4', 'height': 240, 'resolution': '240p', 'format_note': 'HLS', 'preference': -10},
 182         '93': {'ext': 'mp4', 'height': 360, 'resolution': '360p', 'format_note': 'HLS', 'preference': -10},
 183         '94': {'ext': 'mp4', 'height': 480, 'resolution': '480p', 'format_note': 'HLS', 'preference': -10},
 184         '95': {'ext': 'mp4', 'height': 720, 'resolution': '720p', 'format_note': 'HLS', 'preference': -10},
 185         '96': {'ext': 'mp4', 'height': 1080, 'resolution': '1080p', 'format_note': 'HLS', 'preference': -10},
 186         '132': {'ext': 'mp4', 'height': 240, 'resolution': '240p', 'format_note': 'HLS', 'preference': -10},
 187         '151': {'ext': 'mp4', 'height': 72, 'resolution': '72p', 'format_note': 'HLS', 'preference': -10},
 188
 189         # DASH mp4 video
 190         '133': {'ext': 'mp4', 'height': 240, 'resolution': '240p', 'format_note': 'DASH video', 'preference': -40},
 191         '134': {'ext': 'mp4', 'height': 360, 'resolution': '360p', 'format_note': 'DASH video', 'preference': -40},
 192         '135': {'ext': 'mp4', 'height': 480, 'resolution': '480p', 'format_note': 'DASH video', 'preference': -40},
 193         '136': {'ext': 'mp4', 'height': 720, 'resolution': '720p', 'format_note': 'DASH video', 'preference': -40},
 194         '137': {'ext': 'mp4', 'height': 1080, 'resolution': '1080p', 'format_note': 'DASH video', 'preference': -40},
 195         '138': {'ext': 'mp4', 'height': 1081, 'resolution': '>1080p', 'format_note': 'DASH video', 'preference': -40},
 196         '160': {'ext': 'mp4', 'height': 192, 'resolution': '192p', 'format_note': 'DASH video', 'preference': -40},
 197
 198         # Dash mp4 audio
 199         '139': {'ext': 'm4a', 'format_note': 'DASH audio', 'vcodec': 'none', 'abr': 48, 'preference': -50},
 200         '140': {'ext': 'm4a', 'format_note': 'DASH audio', 'vcodec': 'none', 'abr': 128, 'preference': -50},
 201         '141': {'ext': 'm4a', 'format_note': 'DASH audio', 'vcodec': 'none', 'abr': 256, 'preference': -50},
 202
 203         # Dash webm
 204         '242': {'ext': 'webm', 'height': 240, 'resolution': '240p', 'format_note': 'DASH webm', 'preference': -40},
 205         '243': {'ext': 'webm', 'height': 360, 'resolution': '360p', 'format_note': 'DASH webm', 'preference': -40},
 206         '244': {'ext': 'webm', 'height': 480, 'resolution': '480p', 'format_note': 'DASH webm', 'preference': -40},
 207         '245': {'ext': 'webm', 'height': 480, 'resolution': '480p', 'format_note': 'DASH webm', 'preference': -40},
 208         '246': {'ext': 'webm', 'height': 480, 'resolution': '480p', 'format_note': 'DASH webm', 'preference': -40},
 209         '247': {'ext': 'webm', 'height': 720, 'resolution': '720p', 'format_note': 'DASH webm', 'preference': -40},
 210         '248': {'ext': 'webm', 'height': 1080, 'resolution': '1080p', 'format_note': 'DASH webm', 'preference': -40},
 211
 212         # Dash webm audio
 213         '171': {'ext': 'webm', 'vcodec': 'none', 'format_note': 'DASH webm audio', 'abr': 48, 'preference': -50},
 214         '172': {'ext': 'webm', 'vcodec': 'none', 'format_note': 'DASH webm audio', 'abr': 256, 'preference': -50},
 215     }
 216
 217     IE_NAME = u'youtube'
 218     _TESTS = [
 219         {
 220             u"url":  u"http://www.youtube.com/watch?v=BaW_jenozKc",
 221             u"file":  u"BaW_jenozKc.mp4",
 222             u"info_dict": {
 223                 u"title": u"youtube-dl test video \"'/\\ä↭𝕐",
 224                 u"uploader": u"Philipp Hagemeister",
 225                 u"uploader_id": u"phihag",
 226                 u"upload_date": u"20121002",
 227                 u"description": u"test chars:  \"'/\\ä↭𝕐\ntest URL: https://github.com/rg3/youtube-dl/issues/1892\n\nThis is a test video for youtube-dl.\n\nFor more information, contact phihag@phihag.de ."
 228             }
 229         },
 230         {
 231             u"url":  u"http://www.youtube.com/watch?v=UxxajLWwzqY",
 232             u"file":  u"UxxajLWwzqY.mp4",
 233             u"note": u"Test generic use_cipher_signature video (#897)",
 234             u"info_dict": {
 235                 u"upload_date": u"20120506",
 236                 u"title": u"Icona Pop - I Love It (feat. Charli XCX) [OFFICIAL VIDEO]",
 237                 u"description": u"md5:5b292926389560516e384ac437c0ec07",
 238                 u"uploader": u"Icona Pop",
 239                 u"uploader_id": u"IconaPop"
 240             }
 241         },
 242         {
 243             u"url":  u"https://www.youtube.com/watch?v=07FYdnEawAQ",
 244             u"file":  u"07FYdnEawAQ.mp4",
 245             u"note": u"Test VEVO video with age protection (#956)",
 246             u"info_dict": {
 247                 u"upload_date": u"20130703",
 248                 u"title": u"Justin Timberlake - Tunnel Vision (Explicit)",
 249                 u"description": u"md5:64249768eec3bc4276236606ea996373",
 250                 u"uploader": u"justintimberlakeVEVO",
 251                 u"uploader_id": u"justintimberlakeVEVO"
 252             }
 253         },
 254         {
 255             u"url":  u"//www.YouTube.com/watch?v=yZIXLfi8CZQ",
 256             u"file":  u"yZIXLfi8CZQ.mp4",
 257             u"note": u"Embed-only video (#1746)",
 258             u"info_dict": {
 259                 u"upload_date": u"20120608",
 260                 u"title": u"Principal Sexually Assaults A Teacher - Episode 117 - 8th June 2012",
 261                 u"description": u"md5:09b78bd971f1e3e289601dfba15ca4f7",
 262                 u"uploader": u"SET India",
 263                 u"uploader_id": u"setindia"
 264             }
 265         },
 266     ]
 267
 268
 269     @classmethod
 270     def suitable(cls, url):
 271         """Receives a URL and returns True if suitable for this IE."""
 272         if YoutubePlaylistIE.suitable(url): return False
 273         return re.match(cls._VALID_URL, url) is not None
 274
 275     def __init__(self, *args, **kwargs):
 276         super(YoutubeIE, self).__init__(*args, **kwargs)
 277         self._player_cache = {}
 278
 279     def report_video_info_webpage_download(self, video_id):
 280         """Report attempt to download video info webpage."""
 281         self.to_screen(u'%s: Downloading video info webpage' % video_id)
 282
 283     def report_information_extraction(self, video_id):
 284         """Report attempt to extract video information."""
 285         self.to_screen(u'%s: Extracting video information' % video_id)
 286
 287     def report_unavailable_format(self, video_id, format):
 288         """Report extracted video URL."""
 289         self.to_screen(u'%s: Format %s not available' % (video_id, format))
 290
 291     def report_rtmp_download(self):
 292         """Indicate the download will use the RTMP protocol."""
 293         self.to_screen(u'RTMP download detected')
 294
 295     def _extract_signature_function(self, video_id, player_url, slen):
 296         id_m = re.match(r'.*-(?P<id>[a-zA-Z0-9_-]+)\.(?P<ext>[a-z]+)$',
 297                         player_url)
 298         player_type = id_m.group('ext')
 299         player_id = id_m.group('id')
 300
 301         # Read from filesystem cache
 302         func_id = '%s_%s_%d' % (player_type, player_id, slen)
 303         assert os.path.basename(func_id) == func_id
 304         cache_dir = get_cachedir(self._downloader.params)
 305
 306         cache_enabled = cache_dir is not None
 307         if cache_enabled:
 308             cache_fn = os.path.join(os.path.expanduser(cache_dir),
 309                                     u'youtube-sigfuncs',
 310                                     func_id + '.json')
 311             try:
 312                 with io.open(cache_fn, 'r', encoding='utf-8') as cachef:
 313                     cache_spec = json.load(cachef)
 314                 return lambda s: u''.join(s[i] for i in cache_spec)
 315             except IOError:
 316                 pass  # No cache available
 317
 318         if player_type == 'js':
 319             code = self._download_webpage(
 320                 player_url, video_id,
 321                 note=u'Downloading %s player %s' % (player_type, player_id),
 322                 errnote=u'Download of %s failed' % player_url)
 323             res = self._parse_sig_js(code)
 324         elif player_type == 'swf':
 325             urlh = self._request_webpage(
 326                 player_url, video_id,
 327                 note=u'Downloading %s player %s' % (player_type, player_id),
 328                 errnote=u'Download of %s failed' % player_url)
 329             code = urlh.read()
 330             res = self._parse_sig_swf(code)
 331         else:
 332             assert False, 'Invalid player type %r' % player_type
 333
 334         if cache_enabled:
 335             try:
 336                 test_string = u''.join(map(compat_chr, range(slen)))
 337                 cache_res = res(test_string)
 338                 cache_spec = [ord(c) for c in cache_res]
 339                 try:
 340                     os.makedirs(os.path.dirname(cache_fn))
 341                 except OSError as ose:
 342                     if ose.errno != errno.EEXIST:
 343                         raise
 344                 write_json_file(cache_spec, cache_fn)
 345             except Exception:
 346                 tb = traceback.format_exc()
 347                 self._downloader.report_warning(
 348                     u'Writing cache to %r failed: %s' % (cache_fn, tb))
 349
 350         return res
 351
 352     def _print_sig_code(self, func, slen):
 353         def gen_sig_code(idxs):
 354             def _genslice(start, end, step):
 355                 starts = u'' if start == 0 else str(start)
 356                 ends = (u':%d' % (end+step)) if end + step >= 0 else u':'
 357                 steps = u'' if step == 1 else (u':%d' % step)
 358                 return u's[%s%s%s]' % (starts, ends, steps)
 359
 360             step = None
 361             start = '(Never used)'  # Quelch pyflakes warnings - start will be
 362                                     # set as soon as step is set
 363             for i, prev in zip(idxs[1:], idxs[:-1]):
 364                 if step is not None:
 365                     if i - prev == step:
 366                         continue
 367                     yield _genslice(start, prev, step)
 368                     step = None
 369                     continue
 370                 if i - prev in [-1, 1]:
 371                     step = i - prev
 372                     start = prev
 373                     continue
 374                 else:
 375                     yield u's[%d]' % prev
 376             if step is None:
 377                 yield u's[%d]' % i
 378             else:
 379                 yield _genslice(start, i, step)
 380
 381         test_string = u''.join(map(compat_chr, range(slen)))
 382         cache_res = func(test_string)
 383         cache_spec = [ord(c) for c in cache_res]
 384         expr_code = u' + '.join(gen_sig_code(cache_spec))
 385         code = u'if len(s) == %d:\n    return %s\n' % (slen, expr_code)
 386         self.to_screen(u'Extracted signature function:\n' + code)
 387
 388     def _parse_sig_js(self, jscode):
 389         funcname = self._search_regex(
 390             r'signature=([a-zA-Z]+)', jscode,
 391             u'Initial JS player signature function name')
 392
 393         functions = {}
 394
 395         def argidx(varname):
 396             return string.lowercase.index(varname)
 397
 398         def interpret_statement(stmt, local_vars, allow_recursion=20):
 399             if allow_recursion < 0:
 400                 raise ExtractorError(u'Recursion limit reached')
 401
 402             if stmt.startswith(u'var '):
 403                 stmt = stmt[len(u'var '):]
 404             ass_m = re.match(r'^(?P<out>[a-z]+)(?:\[(?P<index>[^\]]+)\])?' +
 405                              r'=(?P<expr>.*)$', stmt)
 406             if ass_m:
 407                 if ass_m.groupdict().get('index'):
 408                     def assign(val):
 409                         lvar = local_vars[ass_m.group('out')]
 410                         idx = interpret_expression(ass_m.group('index'),
 411                                                    local_vars, allow_recursion)
 412                         assert isinstance(idx, int)
 413                         lvar[idx] = val
 414                         return val
 415                     expr = ass_m.group('expr')
 416                 else:
 417                     def assign(val):
 418                         local_vars[ass_m.group('out')] = val
 419                         return val
 420                     expr = ass_m.group('expr')
 421             elif stmt.startswith(u'return '):
 422                 assign = lambda v: v
 423                 expr = stmt[len(u'return '):]
 424             else:
 425                 raise ExtractorError(
 426                     u'Cannot determine left side of statement in %r' % stmt)
 427
 428             v = interpret_expression(expr, local_vars, allow_recursion)
 429             return assign(v)
 430
 431         def interpret_expression(expr, local_vars, allow_recursion):
 432             if expr.isdigit():
 433                 return int(expr)
 434
 435             if expr.isalpha():
 436                 return local_vars[expr]
 437
 438             m = re.match(r'^(?P<in>[a-z]+)\.(?P<member>.*)$', expr)
 439             if m:
 440                 member = m.group('member')
 441                 val = local_vars[m.group('in')]
 442                 if member == 'split("")':
 443                     return list(val)
 444                 if member == 'join("")':
 445                     return u''.join(val)
 446                 if member == 'length':
 447                     return len(val)
 448                 if member == 'reverse()':
 449                     return val[::-1]
 450                 slice_m = re.match(r'slice\((?P<idx>.*)\)', member)
 451                 if slice_m:
 452                     idx = interpret_expression(
 453                         slice_m.group('idx'), local_vars, allow_recursion-1)
 454                     return val[idx:]
 455
 456             m = re.match(
 457                 r'^(?P<in>[a-z]+)\[(?P<idx>.+)\]$', expr)
 458             if m:
 459                 val = local_vars[m.group('in')]
 460                 idx = interpret_expression(m.group('idx'), local_vars,
 461                                            allow_recursion-1)
 462                 return val[idx]
 463
 464             m = re.match(r'^(?P<a>.+?)(?P<op>[%])(?P<b>.+?)$', expr)
 465             if m:
 466                 a = interpret_expression(m.group('a'),
 467                                          local_vars, allow_recursion)
 468                 b = interpret_expression(m.group('b'),
 469                                          local_vars, allow_recursion)
 470                 return a % b
 471
 472             m = re.match(
 473                 r'^(?P<func>[a-zA-Z]+)\((?P<args>[a-z0-9,]+)\)$', expr)
 474             if m:
 475                 fname = m.group('func')
 476                 if fname not in functions:
 477                     functions[fname] = extract_function(fname)
 478                 argvals = [int(v) if v.isdigit() else local_vars[v]
 479                            for v in m.group('args').split(',')]
 480                 return functions[fname](argvals)
 481             raise ExtractorError(u'Unsupported JS expression %r' % expr)
 482
 483         def extract_function(funcname):
 484             func_m = re.search(
 485                 r'function ' + re.escape(funcname) +
 486                 r'\((?P<args>[a-z,]+)\){(?P<code>[^}]+)}',
 487                 jscode)
 488             argnames = func_m.group('args').split(',')
 489
 490             def resf(args):
 491                 local_vars = dict(zip(argnames, args))
 492                 for stmt in func_m.group('code').split(';'):
 493                     res = interpret_statement(stmt, local_vars)
 494                 return res
 495             return resf
 496
 497         initial_function = extract_function(funcname)
 498         return lambda s: initial_function([s])
 499
 500     def _parse_sig_swf(self, file_contents):
 501         if file_contents[1:3] != b'WS':
 502             raise ExtractorError(
 503                 u'Not an SWF file; header is %r' % file_contents[:3])
 504         if file_contents[:1] == b'C':
 505             content = zlib.decompress(file_contents[8:])
 506         else:
 507             raise NotImplementedError(u'Unsupported compression format %r' %
 508                                       file_contents[:1])
 509
 510         def extract_tags(content):
 511             pos = 0
 512             while pos < len(content):
 513                 header16 = struct.unpack('<H', content[pos:pos+2])[0]
 514                 pos += 2
 515                 tag_code = header16 >> 6
 516                 tag_len = header16 & 0x3f
 517                 if tag_len == 0x3f:
 518                     tag_len = struct.unpack('<I', content[pos:pos+4])[0]
 519                     pos += 4
 520                 assert pos+tag_len <= len(content)
 521                 yield (tag_code, content[pos:pos+tag_len])
 522                 pos += tag_len
 523
 524         code_tag = next(tag
 525                         for tag_code, tag in extract_tags(content)
 526                         if tag_code == 82)
 527         p = code_tag.index(b'\0', 4) + 1
 528         code_reader = io.BytesIO(code_tag[p:])
 529
 530         # Parse ABC (AVM2 ByteCode)
 531         def read_int(reader=None):
 532             if reader is None:
 533                 reader = code_reader
 534             res = 0
 535             shift = 0
 536             for _ in range(5):
 537                 buf = reader.read(1)
 538                 assert len(buf) == 1
 539                 b = struct.unpack('<B', buf)[0]
 540                 res = res | ((b & 0x7f) << shift)
 541                 if b & 0x80 == 0:
 542                     break
 543                 shift += 7
 544             return res
 545
 546         def u30(reader=None):
 547             res = read_int(reader)
 548             assert res & 0xf0000000 == 0
 549             return res
 550         u32 = read_int
 551
 552         def s32(reader=None):
 553             v = read_int(reader)
 554             if v & 0x80000000 != 0:
 555                 v = - ((v ^ 0xffffffff) + 1)
 556             return v
 557
 558         def read_string(reader=None):
 559             if reader is None:
 560                 reader = code_reader
 561             slen = u30(reader)
 562             resb = reader.read(slen)
 563             assert len(resb) == slen
 564             return resb.decode('utf-8')
 565
 566         def read_bytes(count, reader=None):
 567             if reader is None:
 568                 reader = code_reader
 569             resb = reader.read(count)
 570             assert len(resb) == count
 571             return resb
 572
 573         def read_byte(reader=None):
 574             resb = read_bytes(1, reader=reader)
 575             res = struct.unpack('<B', resb)[0]
 576             return res
 577
 578         # minor_version + major_version
 579         read_bytes(2 + 2)
 580
 581         # Constant pool
 582         int_count = u30()
 583         for _c in range(1, int_count):
 584             s32()
 585         uint_count = u30()
 586         for _c in range(1, uint_count):
 587             u32()
 588         double_count = u30()
 589         read_bytes((double_count-1) * 8)
 590         string_count = u30()
 591         constant_strings = [u'']
 592         for _c in range(1, string_count):
 593             s = read_string()
 594             constant_strings.append(s)
 595         namespace_count = u30()
 596         for _c in range(1, namespace_count):
 597             read_bytes(1)  # kind
 598             u30()  # name
 599         ns_set_count = u30()
 600         for _c in range(1, ns_set_count):
 601             count = u30()
 602             for _c2 in range(count):
 603                 u30()
 604         multiname_count = u30()
 605         MULTINAME_SIZES = {
 606             0x07: 2,  # QName
 607             0x0d: 2,  # QNameA
 608             0x0f: 1,  # RTQName
 609             0x10: 1,  # RTQNameA
 610             0x11: 0,  # RTQNameL
 611             0x12: 0,  # RTQNameLA
 612             0x09: 2,  # Multiname
 613             0x0e: 2,  # MultinameA
 614             0x1b: 1,  # MultinameL
 615             0x1c: 1,  # MultinameLA
 616         }
 617         multinames = [u'']
 618         for _c in range(1, multiname_count):
 619             kind = u30()
 620             assert kind in MULTINAME_SIZES, u'Invalid multiname kind %r' % kind
 621             if kind == 0x07:
 622                 u30()  # namespace_idx
 623                 name_idx = u30()
 624                 multinames.append(constant_strings[name_idx])
 625             else:
 626                 multinames.append('[MULTINAME kind: %d]' % kind)
 627                 for _c2 in range(MULTINAME_SIZES[kind]):
 628                     u30()
 629
 630         # Methods
 631         method_count = u30()
 632         MethodInfo = collections.namedtuple(
 633             'MethodInfo',
 634             ['NEED_ARGUMENTS', 'NEED_REST'])
 635         method_infos = []
 636         for method_id in range(method_count):
 637             param_count = u30()
 638             u30()  # return type
 639             for _ in range(param_count):
 640                 u30()  # param type
 641             u30()  # name index (always 0 for youtube)
 642             flags = read_byte()
 643             if flags & 0x08 != 0:
 644                 # Options present
 645                 option_count = u30()
 646                 for c in range(option_count):
 647                     u30()  # val
 648                     read_bytes(1)  # kind
 649             if flags & 0x80 != 0:
 650                 # Param names present
 651                 for _ in range(param_count):
 652                     u30()  # param name
 653             mi = MethodInfo(flags & 0x01 != 0, flags & 0x04 != 0)
 654             method_infos.append(mi)
 655
 656         # Metadata
 657         metadata_count = u30()
 658         for _c in range(metadata_count):
 659             u30()  # name
 660             item_count = u30()
 661             for _c2 in range(item_count):
 662                 u30()  # key
 663                 u30()  # value
 664
 665         def parse_traits_info():
 666             trait_name_idx = u30()
 667             kind_full = read_byte()
 668             kind = kind_full & 0x0f
 669             attrs = kind_full >> 4
 670             methods = {}
 671             if kind in [0x00, 0x06]:  # Slot or Const
 672                 u30()  # Slot id
 673                 u30()  # type_name_idx
 674                 vindex = u30()
 675                 if vindex != 0:
 676                     read_byte()  # vkind
 677             elif kind in [0x01, 0x02, 0x03]:  # Method / Getter / Setter
 678                 u30()  # disp_id
 679                 method_idx = u30()
 680                 methods[multinames[trait_name_idx]] = method_idx
 681             elif kind == 0x04:  # Class
 682                 u30()  # slot_id
 683                 u30()  # classi
 684             elif kind == 0x05:  # Function
 685                 u30()  # slot_id
 686                 function_idx = u30()
 687                 methods[function_idx] = multinames[trait_name_idx]
 688             else:
 689                 raise ExtractorError(u'Unsupported trait kind %d' % kind)
 690
 691             if attrs & 0x4 != 0:  # Metadata present
 692                 metadata_count = u30()
 693                 for _c3 in range(metadata_count):
 694                     u30()  # metadata index
 695
 696             return methods
 697
 698         # Classes
 699         TARGET_CLASSNAME = u'SignatureDecipher'
 700         searched_idx = multinames.index(TARGET_CLASSNAME)
 701         searched_class_id = None
 702         class_count = u30()
 703         for class_id in range(class_count):
 704             name_idx = u30()
 705             if name_idx == searched_idx:
 706                 # We found the class we're looking for!
 707                 searched_class_id = class_id
 708             u30()  # super_name idx
 709             flags = read_byte()
 710             if flags & 0x08 != 0:  # Protected namespace is present
 711                 u30()  # protected_ns_idx
 712             intrf_count = u30()
 713             for _c2 in range(intrf_count):
 714                 u30()
 715             u30()  # iinit
 716             trait_count = u30()
 717             for _c2 in range(trait_count):
 718                 parse_traits_info()
 719
 720         if searched_class_id is None:
 721             raise ExtractorError(u'Target class %r not found' %
 722                                  TARGET_CLASSNAME)
 723
 724         method_names = {}
 725         method_idxs = {}
 726         for class_id in range(class_count):
 727             u30()  # cinit
 728             trait_count = u30()
 729             for _c2 in range(trait_count):
 730                 trait_methods = parse_traits_info()
 731                 if class_id == searched_class_id:
 732                     method_names.update(trait_methods.items())
 733                     method_idxs.update(dict(
 734                         (idx, name)
 735                         for name, idx in trait_methods.items()))
 736
 737         # Scripts
 738         script_count = u30()
 739         for _c in range(script_count):
 740             u30()  # init
 741             trait_count = u30()
 742             for _c2 in range(trait_count):
 743                 parse_traits_info()
 744
 745         # Method bodies
 746         method_body_count = u30()
 747         Method = collections.namedtuple('Method', ['code', 'local_count'])
 748         methods = {}
 749         for _c in range(method_body_count):
 750             method_idx = u30()
 751             u30()  # max_stack
 752             local_count = u30()
 753             u30()  # init_scope_depth
 754             u30()  # max_scope_depth
 755             code_length = u30()
 756             code = read_bytes(code_length)
 757             if method_idx in method_idxs:
 758                 m = Method(code, local_count)
 759                 methods[method_idxs[method_idx]] = m
 760             exception_count = u30()
 761             for _c2 in range(exception_count):
 762                 u30()  # from
 763                 u30()  # to
 764                 u30()  # target
 765                 u30()  # exc_type
 766                 u30()  # var_name
 767             trait_count = u30()
 768             for _c2 in range(trait_count):
 769                 parse_traits_info()
 770
 771         assert p + code_reader.tell() == len(code_tag)
 772         assert len(methods) == len(method_idxs)
 773
 774         method_pyfunctions = {}
 775
 776         def extract_function(func_name):
 777             if func_name in method_pyfunctions:
 778                 return method_pyfunctions[func_name]
 779             if func_name not in methods:
 780                 raise ExtractorError(u'Cannot find function %r' % func_name)
 781             m = methods[func_name]
 782
 783             def resfunc(args):
 784                 registers = ['(this)'] + list(args) + [None] * m.local_count
 785                 stack = []
 786                 coder = io.BytesIO(m.code)
 787                 while True:
 788                     opcode = struct.unpack('!B', coder.read(1))[0]
 789                     if opcode == 36:  # pushbyte
 790                         v = struct.unpack('!B', coder.read(1))[0]
 791                         stack.append(v)
 792                     elif opcode == 44:  # pushstring
 793                         idx = u30(coder)
 794                         stack.append(constant_strings[idx])
 795                     elif opcode == 48:  # pushscope
 796                         # We don't implement the scope register, so we'll just
 797                         # ignore the popped value
 798                         stack.pop()
 799                     elif opcode == 70:  # callproperty
 800                         index = u30(coder)
 801                         mname = multinames[index]
 802                         arg_count = u30(coder)
 803                         args = list(reversed(
 804                             [stack.pop() for _ in range(arg_count)]))
 805                         obj = stack.pop()
 806                         if mname == u'split':
 807                             assert len(args) == 1
 808                             assert isinstance(args[0], compat_str)
 809                             assert isinstance(obj, compat_str)
 810                             if args[0] == u'':
 811                                 res = list(obj)
 812                             else:
 813                                 res = obj.split(args[0])
 814                             stack.append(res)
 815                         elif mname == u'slice':
 816                             assert len(args) == 1
 817                             assert isinstance(args[0], int)
 818                             assert isinstance(obj, list)
 819                             res = obj[args[0]:]
 820                             stack.append(res)
 821                         elif mname == u'join':
 822                             assert len(args) == 1
 823                             assert isinstance(args[0], compat_str)
 824                             assert isinstance(obj, list)
 825                             res = args[0].join(obj)
 826                             stack.append(res)
 827                         elif mname in method_pyfunctions:
 828                             stack.append(method_pyfunctions[mname](args))
 829                         else:
 830                             raise NotImplementedError(
 831                                 u'Unsupported property %r on %r'
 832                                 % (mname, obj))
 833                     elif opcode == 72:  # returnvalue
 834                         res = stack.pop()
 835                         return res
 836                     elif opcode == 79:  # callpropvoid
 837                         index = u30(coder)
 838                         mname = multinames[index]
 839                         arg_count = u30(coder)
 840                         args = list(reversed(
 841                             [stack.pop() for _ in range(arg_count)]))
 842                         obj = stack.pop()
 843                         if mname == u'reverse':
 844                             assert isinstance(obj, list)
 845                             obj.reverse()
 846                         else:
 847                             raise NotImplementedError(
 848                                 u'Unsupported (void) property %r on %r'
 849                                 % (mname, obj))
 850                     elif opcode == 93:  # findpropstrict
 851                         index = u30(coder)
 852                         mname = multinames[index]
 853                         res = extract_function(mname)
 854                         stack.append(res)
 855                     elif opcode == 97:  # setproperty
 856                         index = u30(coder)
 857                         value = stack.pop()
 858                         idx = stack.pop()
 859                         obj = stack.pop()
 860                         assert isinstance(obj, list)
 861                         assert isinstance(idx, int)
 862                         obj[idx] = value
 863                     elif opcode == 98:  # getlocal
 864                         index = u30(coder)
 865                         stack.append(registers[index])
 866                     elif opcode == 99:  # setlocal
 867                         index = u30(coder)
 868                         value = stack.pop()
 869                         registers[index] = value
 870                     elif opcode == 102:  # getproperty
 871                         index = u30(coder)
 872                         pname = multinames[index]
 873                         if pname == u'length':
 874                             obj = stack.pop()
 875                             assert isinstance(obj, list)
 876                             stack.append(len(obj))
 877                         else:  # Assume attribute access
 878                             idx = stack.pop()
 879                             assert isinstance(idx, int)
 880                             obj = stack.pop()
 881                             assert isinstance(obj, list)
 882                             stack.append(obj[idx])
 883                     elif opcode == 128:  # coerce
 884                         u30(coder)
 885                     elif opcode == 133:  # coerce_s
 886                         assert isinstance(stack[-1], (type(None), compat_str))
 887                     elif opcode == 164:  # modulo
 888                         value2 = stack.pop()
 889                         value1 = stack.pop()
 890                         res = value1 % value2
 891                         stack.append(res)
 892                     elif opcode == 208:  # getlocal_0
 893                         stack.append(registers[0])
 894                     elif opcode == 209:  # getlocal_1
 895                         stack.append(registers[1])
 896                     elif opcode == 210:  # getlocal_2
 897                         stack.append(registers[2])
 898                     elif opcode == 211:  # getlocal_3
 899                         stack.append(registers[3])
 900                     elif opcode == 214:  # setlocal_2
 901                         registers[2] = stack.pop()
 902                     elif opcode == 215:  # setlocal_3
 903                         registers[3] = stack.pop()
 904                     else:
 905                         raise NotImplementedError(
 906                             u'Unsupported opcode %d' % opcode)
 907
 908             method_pyfunctions[func_name] = resfunc
 909             return resfunc
 910
 911         initial_function = extract_function(u'decipher')
 912         return lambda s: initial_function([s])
 913
 914     def _decrypt_signature(self, s, video_id, player_url, age_gate=False):
 915         """Turn the encrypted s field into a working signature"""
 916
 917         if player_url is not None:
 918             if player_url.startswith(u'//'):
 919                 player_url = u'https:' + player_url
 920             try:
 921                 player_id = (player_url, len(s))
 922                 if player_id not in self._player_cache:
 923                     func = self._extract_signature_function(
 924                         video_id, player_url, len(s)
 925                     )
 926                     self._player_cache[player_id] = func
 927                 func = self._player_cache[player_id]
 928                 if self._downloader.params.get('youtube_print_sig_code'):
 929                     self._print_sig_code(func, len(s))
 930                 return func(s)
 931             except Exception:
 932                 tb = traceback.format_exc()
 933                 self._downloader.report_warning(
 934                     u'Automatic signature extraction failed: ' + tb)
 935
 936             self._downloader.report_warning(
 937                 u'Warning: Falling back to static signature algorithm')
 938
 939         return self._static_decrypt_signature(
 940             s, video_id, player_url, age_gate)
 941
 942     def _static_decrypt_signature(self, s, video_id, player_url, age_gate):
 943         if age_gate:
 944             # The videos with age protection use another player, so the
 945             # algorithms can be different.
 946             if len(s) == 86:
 947                 return s[2:63] + s[82] + s[64:82] + s[63]
 948
 949         if len(s) == 93:
 950             return s[86:29:-1] + s[88] + s[28:5:-1]
 951         elif len(s) == 92:
 952             return s[25] + s[3:25] + s[0] + s[26:42] + s[79] + s[43:79] + s[91] + s[80:83]
 953         elif len(s) == 91:
 954             return s[84:27:-1] + s[86] + s[26:5:-1]
 955         elif len(s) == 90:
 956             return s[25] + s[3:25] + s[2] + s[26:40] + s[77] + s[41:77] + s[89] + s[78:81]
 957         elif len(s) == 89:
 958             return s[84:78:-1] + s[87] + s[77:60:-1] + s[0] + s[59:3:-1]
 959         elif len(s) == 88:
 960             return s[7:28] + s[87] + s[29:45] + s[55] + s[46:55] + s[2] + s[56:87] + s[28]
 961         elif len(s) == 87:
 962             return s[6:27] + s[4] + s[28:39] + s[27] + s[40:59] + s[2] + s[60:]
 963         elif len(s) == 86:
 964             return s[80:72:-1] + s[16] + s[71:39:-1] + s[72] + s[38:16:-1] + s[82] + s[15::-1]
 965         elif len(s) == 85:
 966             return s[3:11] + s[0] + s[12:55] + s[84] + s[56:84]
 967         elif len(s) == 84:
 968             return s[78:70:-1] + s[14] + s[69:37:-1] + s[70] + s[36:14:-1] + s[80] + s[:14][::-1]
 969         elif len(s) == 83:
 970             return s[80:63:-1] + s[0] + s[62:0:-1] + s[63]
 971         elif len(s) == 82:
 972             return s[80:37:-1] + s[7] + s[36:7:-1] + s[0] + s[6:0:-1] + s[37]
 973         elif len(s) == 81:
 974             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]
 975         elif len(s) == 80:
 976             return s[1:19] + s[0] + s[20:68] + s[19] + s[69:80]
 977         elif len(s) == 79:
 978             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]
 979
 980         else:
 981             raise ExtractorError(u'Unable to decrypt signature, key length %d not supported; retrying might work' % (len(s)))
 982
 983     def _get_available_subtitles(self, video_id, webpage):
 984         try:
 985             sub_list = self._download_webpage(
 986                 'http://video.google.com/timedtext?hl=en&type=list&v=%s' % video_id,
 987                 video_id, note=False)
 988         except ExtractorError as err:
 989             self._downloader.report_warning(u'unable to download video subtitles: %s' % compat_str(err))
 990             return {}
 991         lang_list = re.findall(r'name="([^"]*)"[^>]+lang_code="([\w\-]+)"', sub_list)
 992
 993         sub_lang_list = {}
 994         for l in lang_list:
 995             lang = l[1]
 996             params = compat_urllib_parse.urlencode({
 997                 'lang': lang,
 998                 'v': video_id,
 999                 'fmt': self._downloader.params.get('subtitlesformat', 'srt'),
1000                 'name': l[0].encode('utf-8'),
1001             })
1002             url = u'http://www.youtube.com/api/timedtext?' + params
1003             sub_lang_list[lang] = url
1004         if not sub_lang_list:
1005             self._downloader.report_warning(u'video doesn\'t have subtitles')
1006             return {}
1007         return sub_lang_list
1008
1009     def _get_available_automatic_caption(self, video_id, webpage):
1010         """We need the webpage for getting the captions url, pass it as an
1011            argument to speed up the process."""
1012         sub_format = self._downloader.params.get('subtitlesformat', 'srt')
1013         self.to_screen(u'%s: Looking for automatic captions' % video_id)
1014         mobj = re.search(r';ytplayer.config = ({.*?});', webpage)
1015         err_msg = u'Couldn\'t find automatic captions for %s' % video_id
1016         if mobj is None:
1017             self._downloader.report_warning(err_msg)
1018             return {}
1019         player_config = json.loads(mobj.group(1))
1020         try:
1021             args = player_config[u'args']
1022             caption_url = args[u'ttsurl']
1023             timestamp = args[u'timestamp']
1024             # We get the available subtitles
1025             list_params = compat_urllib_parse.urlencode({
1026                 'type': 'list',
1027                 'tlangs': 1,
1028                 'asrs': 1,
1029             })
1030             list_url = caption_url + '&' + list_params
1031             caption_list = self._download_xml(list_url, video_id)
1032             original_lang_node = caption_list.find('track')
1033             if original_lang_node is None or original_lang_node.attrib.get('kind') != 'asr' :
1034                 self._downloader.report_warning(u'Video doesn\'t have automatic captions')
1035                 return {}
1036             original_lang = original_lang_node.attrib['lang_code']
1037
1038             sub_lang_list = {}
1039             for lang_node in caption_list.findall('target'):
1040                 sub_lang = lang_node.attrib['lang_code']
1041                 params = compat_urllib_parse.urlencode({
1042                     'lang': original_lang,
1043                     'tlang': sub_lang,
1044                     'fmt': sub_format,
1045                     'ts': timestamp,
1046                     'kind': 'asr',
1047                 })
1048                 sub_lang_list[sub_lang] = caption_url + '&' + params
1049             return sub_lang_list
1050         # An extractor error can be raise by the download process if there are
1051         # no automatic captions but there are subtitles
1052         except (KeyError, ExtractorError):
1053             self._downloader.report_warning(err_msg)
1054             return {}
1055
1056     def _extract_id(self, url):
1057         mobj = re.match(self._VALID_URL, url, re.VERBOSE)
1058         if mobj is None:
1059             raise ExtractorError(u'Invalid URL: %s' % url)
1060         video_id = mobj.group(2)
1061         return video_id
1062
1063     def _get_video_url_list(self, url_map):
1064         """
1065         Transform a dictionary in the format {itag:url} to a list of (itag, url)
1066         with the requested formats.
1067         """
1068         existing_formats = [x for x in self._formats if x in url_map]
1069         if len(existing_formats) == 0:
1070             raise ExtractorError(u'no known formats available for video')
1071         video_url_list = [(f, url_map[f]) for f in existing_formats] # All formats
1072         video_url_list.reverse() # order worst to best
1073         return video_url_list
1074
1075     def _extract_from_m3u8(self, manifest_url, video_id):
1076         url_map = {}
1077         def _get_urls(_manifest):
1078             lines = _manifest.split('\n')
1079             urls = filter(lambda l: l and not l.startswith('#'),
1080                             lines)
1081             return urls
1082         manifest = self._download_webpage(manifest_url, video_id, u'Downloading formats manifest')
1083         formats_urls = _get_urls(manifest)
1084         for format_url in formats_urls:
1085             itag = self._search_regex(r'itag/(\d+?)/', format_url, 'itag')
1086             url_map[itag] = format_url
1087         return url_map
1088
1089     def _extract_annotations(self, video_id):
1090         url = 'https://www.youtube.com/annotations_invideo?features=1&legacy=1&video_id=%s' % video_id
1091         return self._download_webpage(url, video_id, note=u'Searching for annotations.', errnote=u'Unable to download video annotations.')
1092
1093     def _real_extract(self, url):
1094         # Extract original video URL from URL with redirection, like age verification, using next_url parameter
1095         mobj = re.search(self._NEXT_URL_RE, url)
1096         if mobj:
1097             url = 'https://www.youtube.com/' + compat_urllib_parse.unquote(mobj.group(1)).lstrip('/')
1098         video_id = self._extract_id(url)
1099
1100         # Get video webpage
1101         url = 'https://www.youtube.com/watch?v=%s&gl=US&hl=en&has_verified=1' % video_id
1102         video_webpage = self._download_webpage(url, video_id)
1103
1104         # Attempt to extract SWF player URL
1105         mobj = re.search(r'swfConfig.*?"(https?:\\/\\/.*?watch.*?-.*?\.swf)"', video_webpage)
1106         if mobj is not None:
1107             player_url = re.sub(r'\\(.)', r'\1', mobj.group(1))
1108         else:
1109             player_url = None
1110
1111         # Get video info
1112         self.report_video_info_webpage_download(video_id)
1113         if re.search(r'player-age-gate-content">', video_webpage) is not None:
1114             self.report_age_confirmation()
1115             age_gate = True
1116             # We simulate the access to the video from www.youtube.com/v/{video_id}
1117             # this can be viewed without login into Youtube
1118             data = compat_urllib_parse.urlencode({'video_id': video_id,
1119                                                   'el': 'player_embedded',
1120                                                   'gl': 'US',
1121                                                   'hl': 'en',
1122                                                   'eurl': 'https://youtube.googleapis.com/v/' + video_id,
1123                                                   'asv': 3,
1124                                                   'sts':'1588',
1125                                                   })
1126             video_info_url = 'https://www.youtube.com/get_video_info?' + data
1127             video_info_webpage = self._download_webpage(video_info_url, video_id,
1128                                     note=False,
1129                                     errnote='unable to download video info webpage')
1130             video_info = compat_parse_qs(video_info_webpage)
1131         else:
1132             age_gate = False
1133             for el_type in ['&el=embedded', '&el=detailpage', '&el=vevo', '']:
1134                 video_info_url = ('https://www.youtube.com/get_video_info?&video_id=%s%s&ps=default&eurl=&gl=US&hl=en'
1135                         % (video_id, el_type))
1136                 video_info_webpage = self._download_webpage(video_info_url, video_id,
1137                                         note=False,
1138                                         errnote='unable to download video info webpage')
1139                 video_info = compat_parse_qs(video_info_webpage)
1140                 if 'token' in video_info:
1141                     break
1142         if 'token' not in video_info:
1143             if 'reason' in video_info:
1144                 raise ExtractorError(u'YouTube said: %s' % video_info['reason'][0], expected=True)
1145             else:
1146                 raise ExtractorError(u'"token" parameter not in video info for unknown reason')
1147
1148         if 'view_count' in video_info:
1149             view_count = int(video_info['view_count'][0])
1150         else:
1151             view_count = None
1152
1153         # Check for "rental" videos
1154         if 'ypc_video_rental_bar_text' in video_info and 'author' not in video_info:
1155             raise ExtractorError(u'"rental" videos not supported')
1156
1157         # Start extracting information
1158         self.report_information_extraction(video_id)
1159
1160         # uploader
1161         if 'author' not in video_info:
1162             raise ExtractorError(u'Unable to extract uploader name')
1163         video_uploader = compat_urllib_parse.unquote_plus(video_info['author'][0])
1164
1165         # uploader_id
1166         video_uploader_id = None
1167         mobj = re.search(r'<link itemprop="url" href="http://www.youtube.com/(?:user|channel)/([^"]+)">', video_webpage)
1168         if mobj is not None:
1169             video_uploader_id = mobj.group(1)
1170         else:
1171             self._downloader.report_warning(u'unable to extract uploader nickname')
1172
1173         # title
1174         if 'title' in video_info:
1175             video_title = compat_urllib_parse.unquote_plus(video_info['title'][0])
1176         else:
1177             self._downloader.report_warning(u'Unable to extract video title')
1178             video_title = u'_'
1179
1180         # thumbnail image
1181         # We try first to get a high quality image:
1182         m_thumb = re.search(r'<span itemprop="thumbnail".*?href="(.*?)">',
1183                             video_webpage, re.DOTALL)
1184         if m_thumb is not None:
1185             video_thumbnail = m_thumb.group(1)
1186         elif 'thumbnail_url' not in video_info:
1187             self._downloader.report_warning(u'unable to extract video thumbnail')
1188             video_thumbnail = None
1189         else:   # don't panic if we can't find it
1190             video_thumbnail = compat_urllib_parse.unquote_plus(video_info['thumbnail_url'][0])
1191
1192         # upload date
1193         upload_date = None
1194         mobj = re.search(r'id="eow-date.*?>(.*?)</span>', video_webpage, re.DOTALL)
1195         if mobj is not None:
1196             upload_date = ' '.join(re.sub(r'[/,-]', r' ', mobj.group(1)).split())
1197             upload_date = unified_strdate(upload_date)
1198
1199         # description
1200         video_description = get_element_by_id("eow-description", video_webpage)
1201         if video_description:
1202             video_description = re.sub(r'''(?x)
1203                 <a\s+
1204                     (?:[a-zA-Z-]+="[^"]+"\s+)*?
1205                     title="([^"]+)"\s+
1206                     (?:[a-zA-Z-]+="[^"]+"\s+)*?
1207                     class="yt-uix-redirect-link"\s*>
1208                 [^<]+
1209                 </a>
1210             ''', r'\1', video_description)
1211             video_description = clean_html(video_description)
1212         else:
1213             fd_mobj = re.search(r'<meta name="description" content="([^"]+)"', video_webpage)
1214             if fd_mobj:
1215                 video_description = unescapeHTML(fd_mobj.group(1))
1216             else:
1217                 video_description = u''
1218
1219         def _extract_count(klass):
1220             count = self._search_regex(
1221                 r'class="%s">([\d,]+)</span>' % re.escape(klass),
1222                 video_webpage, klass, default=None)
1223             if count is not None:
1224                 return int(count.replace(',', ''))
1225             return None
1226         like_count = _extract_count(u'likes-count')
1227         dislike_count = _extract_count(u'dislikes-count')
1228
1229         # subtitles
1230         video_subtitles = self.extract_subtitles(video_id, video_webpage)
1231
1232         if self._downloader.params.get('listsubtitles', False):
1233             self._list_available_subtitles(video_id, video_webpage)
1234             return
1235
1236         if 'length_seconds' not in video_info:
1237             self._downloader.report_warning(u'unable to extract video duration')
1238             video_duration = None
1239         else:
1240             video_duration = int(compat_urllib_parse.unquote_plus(video_info['length_seconds'][0]))
1241
1242         # annotations
1243         video_annotations = None
1244         if self._downloader.params.get('writeannotations', False):
1245                 video_annotations = self._extract_annotations(video_id)
1246
1247         # Decide which formats to download
1248
1249         try:
1250             mobj = re.search(r';ytplayer.config = ({.*?});', video_webpage)
1251             if not mobj:
1252                 raise ValueError('Could not find vevo ID')
1253             info = json.loads(mobj.group(1))
1254             args = info['args']
1255             # Easy way to know if the 's' value is in url_encoded_fmt_stream_map
1256             # this signatures are encrypted
1257             if 'url_encoded_fmt_stream_map' not in args:
1258                 raise ValueError(u'No stream_map present')  # caught below
1259             re_signature = re.compile(r'[&,]s=')
1260             m_s = re_signature.search(args['url_encoded_fmt_stream_map'])
1261             if m_s is not None:
1262                 self.to_screen(u'%s: Encrypted signatures detected.' % video_id)
1263                 video_info['url_encoded_fmt_stream_map'] = [args['url_encoded_fmt_stream_map']]
1264             m_s = re_signature.search(args.get('adaptive_fmts', u''))
1265             if m_s is not None:
1266                 if 'adaptive_fmts' in video_info:
1267                     video_info['adaptive_fmts'][0] += ',' + args['adaptive_fmts']
1268                 else:
1269                     video_info['adaptive_fmts'] = [args['adaptive_fmts']]
1270         except ValueError:
1271             pass
1272
1273         if 'conn' in video_info and video_info['conn'][0].startswith('rtmp'):
1274             self.report_rtmp_download()
1275             video_url_list = [(None, video_info['conn'][0])]
1276         elif len(video_info.get('url_encoded_fmt_stream_map', [])) >= 1 or len(video_info.get('adaptive_fmts', [])) >= 1:
1277             encoded_url_map = video_info.get('url_encoded_fmt_stream_map', [''])[0] + ',' + video_info.get('adaptive_fmts',[''])[0]
1278             if 'rtmpe%3Dyes' in encoded_url_map:
1279                 raise ExtractorError('rtmpe downloads are not supported, see https://github.com/rg3/youtube-dl/issues/343 for more information.', expected=True)
1280             url_map = {}
1281             for url_data_str in encoded_url_map.split(','):
1282                 url_data = compat_parse_qs(url_data_str)
1283                 if 'itag' in url_data and 'url' in url_data:
1284                     url = url_data['url'][0]
1285                     if 'sig' in url_data:
1286                         url += '&signature=' + url_data['sig'][0]
1287                     elif 's' in url_data:
1288                         encrypted_sig = url_data['s'][0]
1289                         if self._downloader.params.get('verbose'):
1290                             if age_gate:
1291                                 if player_url is None:
1292                                     player_version = 'unknown'
1293                                 else:
1294                                     player_version = self._search_regex(
1295                                         r'-(.+)\.swf$', player_url,
1296                                         u'flash player', fatal=False)
1297                                 player_desc = 'flash player %s' % player_version
1298                             else:
1299                                 player_version = self._search_regex(
1300                                     r'html5player-(.+?)\.js', video_webpage,
1301                                     'html5 player', fatal=False)
1302                                 player_desc = u'html5 player %s' % player_version
1303
1304                             parts_sizes = u'.'.join(compat_str(len(part)) for part in encrypted_sig.split('.'))
1305                             self.to_screen(u'encrypted signature length %d (%s), itag %s, %s' %
1306                                 (len(encrypted_sig), parts_sizes, url_data['itag'][0], player_desc))
1307
1308                         if not age_gate:
1309                             jsplayer_url_json = self._search_regex(
1310                                 r'"assets":.+?"js":\s*("[^"]+")',
1311                                 video_webpage, u'JS player URL')
1312                             player_url = json.loads(jsplayer_url_json)
1313
1314                         signature = self._decrypt_signature(
1315                             encrypted_sig, video_id, player_url, age_gate)
1316                         url += '&signature=' + signature
1317                     if 'ratebypass' not in url:
1318                         url += '&ratebypass=yes'
1319                     url_map[url_data['itag'][0]] = url
1320             video_url_list = self._get_video_url_list(url_map)
1321         elif video_info.get('hlsvp'):
1322             manifest_url = video_info['hlsvp'][0]
1323             url_map = self._extract_from_m3u8(manifest_url, video_id)
1324             video_url_list = self._get_video_url_list(url_map)
1325         else:
1326             raise ExtractorError(u'no conn, hlsvp or url_encoded_fmt_stream_map information found in video info')
1327
1328         formats = []
1329         for itag, video_real_url in video_url_list:
1330             dct = {
1331                 'format_id': itag,
1332                 'url': video_real_url,
1333                 'player_url': player_url,
1334             }
1335             dct.update(self._formats[itag])
1336             formats.append(dct)
1337
1338         self._sort_formats(formats)
1339
1340         return {
1341             'id':           video_id,
1342             'uploader':     video_uploader,
1343             'uploader_id':  video_uploader_id,
1344             'upload_date':  upload_date,
1345             'title':        video_title,
1346             'thumbnail':    video_thumbnail,
1347             'description':  video_description,
1348             'subtitles':    video_subtitles,
1349             'duration':     video_duration,
1350             'age_limit':    18 if age_gate else 0,
1351             'annotations':  video_annotations,
1352             'webpage_url': 'https://www.youtube.com/watch?v=%s' % video_id,
1353             'view_count':   view_count,
1354             'like_count': like_count,
1355             'dislike_count': dislike_count,
1356             'formats':      formats,
1357         }
1358
1359 class YoutubePlaylistIE(YoutubeBaseInfoExtractor):
1360     IE_DESC = u'YouTube.com playlists'
1361     _VALID_URL = r"""(?:
1362                         (?:https?://)?
1363                         (?:\w+\.)?
1364                         youtube\.com/
1365                         (?:
1366                            (?:course|view_play_list|my_playlists|artist|playlist|watch)
1367                            \? (?:.*?&)*? (?:p|a|list)=
1368                         |  p/
1369                         )
1370                         ((?:PL|EC|UU|FL|RD)?[0-9A-Za-z-_]{10,})
1371                         .*
1372                      |
1373                         ((?:PL|EC|UU|FL|RD)[0-9A-Za-z-_]{10,})
1374                      )"""
1375     _TEMPLATE_URL = 'https://www.youtube.com/playlist?list=%s&page=%s'
1376     _MORE_PAGES_INDICATOR = r'data-link-type="next"'
1377     _VIDEO_RE = r'href="/watch\?v=(?P<id>[0-9A-Za-z_-]{11})&amp;[^"]*?index=(?P<index>\d+)'
1378     IE_NAME = u'youtube:playlist'
1379
1380     @classmethod
1381     def suitable(cls, url):
1382         """Receives a URL and returns True if suitable for this IE."""
1383         return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
1384
1385     def _real_initialize(self):
1386         self._login()
1387
1388     def _ids_to_results(self, ids):
1389         return [self.url_result(vid_id, 'Youtube', video_id=vid_id)
1390                        for vid_id in ids]
1391
1392     def _extract_mix(self, playlist_id):
1393         # The mixes are generated from a a single video
1394         # the id of the playlist is just 'RD' + video_id
1395         url = 'https://youtube.com/watch?v=%s&list=%s' % (playlist_id[-11:], playlist_id)
1396         webpage = self._download_webpage(url, playlist_id, u'Downloading Youtube mix')
1397         title_span = (get_element_by_attribute('class', 'title long-title', webpage) or
1398             get_element_by_attribute('class', 'title ', webpage))
1399         title = clean_html(title_span)
1400         video_re = r'data-index="\d+".*?href="/watch\?v=([0-9A-Za-z_-]{11})&amp;[^"]*?list=%s' % re.escape(playlist_id)
1401         ids = orderedSet(re.findall(video_re, webpage))
1402         url_results = self._ids_to_results(ids)
1403
1404         return self.playlist_result(url_results, playlist_id, title)
1405
1406     def _real_extract(self, url):
1407         # Extract playlist id
1408         mobj = re.match(self._VALID_URL, url, re.VERBOSE)
1409         if mobj is None:
1410             raise ExtractorError(u'Invalid URL: %s' % url)
1411         playlist_id = mobj.group(1) or mobj.group(2)
1412
1413         # Check if it's a video-specific URL
1414         query_dict = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
1415         if 'v' in query_dict:
1416             video_id = query_dict['v'][0]
1417             if self._downloader.params.get('noplaylist'):
1418                 self.to_screen(u'Downloading just video %s because of --no-playlist' % video_id)
1419                 return self.url_result(video_id, 'Youtube', video_id=video_id)
1420             else:
1421                 self.to_screen(u'Downloading playlist PL%s - add --no-playlist to just download video %s' % (playlist_id, video_id))
1422
1423         if playlist_id.startswith('RD'):
1424             # Mixes require a custom extraction process
1425             return self._extract_mix(playlist_id)
1426         if playlist_id.startswith('TL'):
1427             raise ExtractorError(u'For downloading YouTube.com top lists, use '
1428                 u'the "yttoplist" keyword, for example "youtube-dl \'yttoplist:music:Top Tracks\'"', expected=True)
1429
1430         # Extract the video ids from the playlist pages
1431         ids = []
1432
1433         for page_num in itertools.count(1):
1434             url = self._TEMPLATE_URL % (playlist_id, page_num)
1435             page = self._download_webpage(url, playlist_id, u'Downloading page #%s' % page_num)
1436             matches = re.finditer(self._VIDEO_RE, page)
1437             # We remove the duplicates and the link with index 0
1438             # (it's not the first video of the playlist)
1439             new_ids = orderedSet(m.group('id') for m in matches if m.group('index') != '0')
1440             ids.extend(new_ids)
1441
1442             if re.search(self._MORE_PAGES_INDICATOR, page) is None:
1443                 break
1444
1445         playlist_title = self._og_search_title(page)
1446
1447         url_results = self._ids_to_results(ids)
1448         return self.playlist_result(url_results, playlist_id, playlist_title)
1449
1450
1451 class YoutubeTopListIE(YoutubePlaylistIE):
1452     IE_NAME = u'youtube:toplist'
1453     IE_DESC = (u'YouTube.com top lists, "yttoplist:{channel}:{list title}"'
1454         u' (Example: "yttoplist:music:Top Tracks")')
1455     _VALID_URL = r'yttoplist:(?P<chann>.*?):(?P<title>.*?)$'
1456
1457     def _real_extract(self, url):
1458         mobj = re.match(self._VALID_URL, url)
1459         channel = mobj.group('chann')
1460         title = mobj.group('title')
1461         query = compat_urllib_parse.urlencode({'title': title})
1462         playlist_re = 'href="([^"]+?%s[^"]+?)"' % re.escape(query)
1463         channel_page = self._download_webpage('https://www.youtube.com/%s' % channel, title)
1464         link = self._html_search_regex(playlist_re, channel_page, u'list')
1465         url = compat_urlparse.urljoin('https://www.youtube.com/', link)
1466
1467         video_re = r'data-index="\d+".*?data-video-id="([0-9A-Za-z_-]{11})"'
1468         ids = []
1469         # sometimes the webpage doesn't contain the videos
1470         # retry until we get them
1471         for i in itertools.count(0):
1472             msg = u'Downloading Youtube mix'
1473             if i > 0:
1474                 msg += ', retry #%d' % i
1475             webpage = self._download_webpage(url, title, msg)
1476             ids = orderedSet(re.findall(video_re, webpage))
1477             if ids:
1478                 break
1479         url_results = self._ids_to_results(ids)
1480         return self.playlist_result(url_results, playlist_title=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     _MORE_PAGES_INDICATOR = 'yt-uix-load-more'
1487     _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'
1488     IE_NAME = u'youtube:channel'
1489
1490     def extract_videos_from_page(self, page):
1491         ids_in_page = []
1492         for mobj in re.finditer(r'href="/watch\?v=([0-9A-Za-z_-]+)&?', page):
1493             if mobj.group(1) not in ids_in_page:
1494                 ids_in_page.append(mobj.group(1))
1495         return ids_in_page
1496
1497     def _real_extract(self, url):
1498         # Extract channel id
1499         mobj = re.match(self._VALID_URL, url)
1500         if mobj is None:
1501             raise ExtractorError(u'Invalid URL: %s' % url)
1502
1503         # Download channel page
1504         channel_id = mobj.group(1)
1505         video_ids = []
1506         url = 'https://www.youtube.com/channel/%s/videos' % channel_id
1507         channel_page = self._download_webpage(url, channel_id)
1508         autogenerated = re.search(r'''(?x)
1509                 class="[^"]*?(?:
1510                     channel-header-autogenerated-label|
1511                     yt-channel-title-autogenerated
1512                 )[^"]*"''', channel_page) is not None
1513
1514         if autogenerated:
1515             # The videos are contained in a single page
1516             # the ajax pages can't be used, they are empty
1517             video_ids = self.extract_videos_from_page(channel_page)
1518         else:
1519             # Download all channel pages using the json-based channel_ajax query
1520             for pagenum in itertools.count(1):
1521                 url = self._MORE_PAGES_URL % (pagenum, channel_id)
1522                 page = self._download_webpage(url, channel_id,
1523                                               u'Downloading page #%s' % pagenum)
1524
1525                 page = json.loads(page)
1526
1527                 ids_in_page = self.extract_videos_from_page(page['content_html'])
1528                 video_ids.extend(ids_in_page)
1529
1530                 if self._MORE_PAGES_INDICATOR not in page['load_more_widget_html']:
1531                     break
1532
1533         self._downloader.to_screen(u'[youtube] Channel %s: Found %i videos' % (channel_id, len(video_ids)))
1534
1535         url_entries = [self.url_result(video_id, 'Youtube', video_id=video_id)
1536                        for video_id in video_ids]
1537         return self.playlist_result(url_entries, channel_id)
1538
1539
1540 class YoutubeUserIE(InfoExtractor):
1541     IE_DESC = u'YouTube.com user videos (URL or "ytuser" keyword)'
1542     _VALID_URL = r'(?:(?:(?:https?://)?(?:\w+\.)?youtube\.com/(?:user/)?(?!(?:attribution_link|watch)(?:$|[^a-z_A-Z0-9-])))|ytuser:)(?!feed/)([A-Za-z0-9_-]+)'
1543     _TEMPLATE_URL = 'http://gdata.youtube.com/feeds/api/users/%s'
1544     _GDATA_PAGE_SIZE = 50
1545     _GDATA_URL = 'http://gdata.youtube.com/feeds/api/users/%s/uploads?max-results=%d&start-index=%d&alt=json'
1546     IE_NAME = u'youtube:user'
1547
1548     @classmethod
1549     def suitable(cls, url):
1550         # Don't return True if the url can be extracted with other youtube
1551         # extractor, the regex would is too permissive and it would match.
1552         other_ies = iter(klass for (name, klass) in globals().items() if name.endswith('IE') and klass is not cls)
1553         if any(ie.suitable(url) for ie in other_ies): return False
1554         else: return super(YoutubeUserIE, cls).suitable(url)
1555
1556     def _real_extract(self, url):
1557         # Extract username
1558         mobj = re.match(self._VALID_URL, url)
1559         if mobj is None:
1560             raise ExtractorError(u'Invalid URL: %s' % url)
1561
1562         username = mobj.group(1)
1563
1564         # Download video ids using YouTube Data API. Result size per
1565         # query is limited (currently to 50 videos) so we need to query
1566         # page by page until there are no video ids - it means we got
1567         # all of them.
1568
1569         url_results = []
1570
1571         for pagenum in itertools.count(0):
1572             start_index = pagenum * self._GDATA_PAGE_SIZE + 1
1573
1574             gdata_url = self._GDATA_URL % (username, self._GDATA_PAGE_SIZE, start_index)
1575             page = self._download_webpage(gdata_url, username,
1576                                           u'Downloading video ids from %d to %d' % (start_index, start_index + self._GDATA_PAGE_SIZE))
1577
1578             try:
1579                 response = json.loads(page)
1580             except ValueError as err:
1581                 raise ExtractorError(u'Invalid JSON in API response: ' + compat_str(err))
1582             if 'entry' not in response['feed']:
1583                 # Number of videos is a multiple of self._MAX_RESULTS
1584                 break
1585
1586             # Extract video identifiers
1587             entries = response['feed']['entry']
1588             for entry in entries:
1589                 title = entry['title']['$t']
1590                 video_id = entry['id']['$t'].split('/')[-1]
1591                 url_results.append({
1592                     '_type': 'url',
1593                     'url': video_id,
1594                     'ie_key': 'Youtube',
1595                     'id': 'video_id',
1596                     'title': title,
1597                 })
1598
1599             # A little optimization - if current page is not
1600             # "full", ie. does not contain PAGE_SIZE video ids then
1601             # we can assume that this page is the last one - there
1602             # are no more ids on further pages - no need to query
1603             # again.
1604
1605             if len(entries) < self._GDATA_PAGE_SIZE:
1606                 break
1607
1608         return self.playlist_result(url_results, playlist_title=username)
1609
1610
1611 class YoutubeSearchIE(SearchInfoExtractor):
1612     IE_DESC = u'YouTube.com searches'
1613     _API_URL = 'https://gdata.youtube.com/feeds/api/videos?q=%s&start-index=%i&max-results=50&v=2&alt=jsonc'
1614     _MAX_RESULTS = 1000
1615     IE_NAME = u'youtube:search'
1616     _SEARCH_KEY = 'ytsearch'
1617
1618     def _get_n_results(self, query, n):
1619         """Get a specified number of results for a query"""
1620
1621         video_ids = []
1622         pagenum = 0
1623         limit = n
1624
1625         while (50 * pagenum) < limit:
1626             result_url = self._API_URL % (compat_urllib_parse.quote_plus(query), (50*pagenum)+1)
1627             data_json = self._download_webpage(
1628                 result_url, video_id=u'query "%s"' % query,
1629                 note=u'Downloading page %s' % (pagenum + 1),
1630                 errnote=u'Unable to download API page')
1631             data = json.loads(data_json)
1632             api_response = data['data']
1633
1634             if 'items' not in api_response:
1635                 raise ExtractorError(u'[youtube] No video results')
1636
1637             new_ids = list(video['id'] for video in api_response['items'])
1638             video_ids += new_ids
1639
1640             limit = min(n, api_response['totalItems'])
1641             pagenum += 1
1642
1643         if len(video_ids) > n:
1644             video_ids = video_ids[:n]
1645         videos = [self.url_result(video_id, 'Youtube', video_id=video_id)
1646                   for video_id in video_ids]
1647         return self.playlist_result(videos, query)
1648
1649 class YoutubeSearchDateIE(YoutubeSearchIE):
1650     IE_NAME = YoutubeSearchIE.IE_NAME + ':date'
1651     _API_URL = 'https://gdata.youtube.com/feeds/api/videos?q=%s&start-index=%i&max-results=50&v=2&alt=jsonc&orderby=published'
1652     _SEARCH_KEY = 'ytsearchdate'
1653     IE_DESC = u'YouTube.com searches, newest videos first'
1654
1655 class YoutubeShowIE(InfoExtractor):
1656     IE_DESC = u'YouTube.com (multi-season) shows'
1657     _VALID_URL = r'https?://www\.youtube\.com/show/(.*)'
1658     IE_NAME = u'youtube:show'
1659
1660     def _real_extract(self, url):
1661         mobj = re.match(self._VALID_URL, url)
1662         show_name = mobj.group(1)
1663         webpage = self._download_webpage(url, show_name, u'Downloading show webpage')
1664         # There's one playlist for each season of the show
1665         m_seasons = list(re.finditer(r'href="(/playlist\?list=.*?)"', webpage))
1666         self.to_screen(u'%s: Found %s seasons' % (show_name, len(m_seasons)))
1667         return [self.url_result('https://www.youtube.com' + season.group(1), 'YoutubePlaylist') for season in m_seasons]
1668
1669
1670 class YoutubeFeedsInfoExtractor(YoutubeBaseInfoExtractor):
1671     """
1672     Base class for extractors that fetch info from
1673     http://www.youtube.com/feed_ajax
1674     Subclasses must define the _FEED_NAME and _PLAYLIST_TITLE properties.
1675     """
1676     _LOGIN_REQUIRED = True
1677     # use action_load_personal_feed instead of action_load_system_feed
1678     _PERSONAL_FEED = False
1679
1680     @property
1681     def _FEED_TEMPLATE(self):
1682         action = 'action_load_system_feed'
1683         if self._PERSONAL_FEED:
1684             action = 'action_load_personal_feed'
1685         return 'http://www.youtube.com/feed_ajax?%s=1&feed_name=%s&paging=%%s' % (action, self._FEED_NAME)
1686
1687     @property
1688     def IE_NAME(self):
1689         return u'youtube:%s' % self._FEED_NAME
1690
1691     def _real_initialize(self):
1692         self._login()
1693
1694     def _real_extract(self, url):
1695         feed_entries = []
1696         paging = 0
1697         for i in itertools.count(1):
1698             info = self._download_webpage(self._FEED_TEMPLATE % paging,
1699                                           u'%s feed' % self._FEED_NAME,
1700                                           u'Downloading page %s' % i)
1701             info = json.loads(info)
1702             feed_html = info['feed_html']
1703             m_ids = re.finditer(r'"/watch\?v=(.*?)["&]', feed_html)
1704             ids = orderedSet(m.group(1) for m in m_ids)
1705             feed_entries.extend(
1706                 self.url_result(video_id, 'Youtube', video_id=video_id)
1707                 for video_id in ids)
1708             if info['paging'] is None:
1709                 break
1710             paging = info['paging']
1711         return self.playlist_result(feed_entries, playlist_title=self._PLAYLIST_TITLE)
1712
1713 class YoutubeSubscriptionsIE(YoutubeFeedsInfoExtractor):
1714     IE_DESC = u'YouTube.com subscriptions feed, "ytsubs" keyword(requires authentication)'
1715     _VALID_URL = r'https?://www\.youtube\.com/feed/subscriptions|:ytsubs(?:criptions)?'
1716     _FEED_NAME = 'subscriptions'
1717     _PLAYLIST_TITLE = u'Youtube Subscriptions'
1718
1719 class YoutubeRecommendedIE(YoutubeFeedsInfoExtractor):
1720     IE_DESC = u'YouTube.com recommended videos, "ytrec" keyword (requires authentication)'
1721     _VALID_URL = r'https?://www\.youtube\.com/feed/recommended|:ytrec(?:ommended)?'
1722     _FEED_NAME = 'recommended'
1723     _PLAYLIST_TITLE = u'Youtube Recommended videos'
1724
1725 class YoutubeWatchLaterIE(YoutubeFeedsInfoExtractor):
1726     IE_DESC = u'Youtube watch later list, "ytwatchlater" keyword (requires authentication)'
1727     _VALID_URL = r'https?://www\.youtube\.com/feed/watch_later|:ytwatchlater'
1728     _FEED_NAME = 'watch_later'
1729     _PLAYLIST_TITLE = u'Youtube Watch Later'
1730     _PERSONAL_FEED = True
1731
1732 class YoutubeHistoryIE(YoutubeFeedsInfoExtractor):
1733     IE_DESC = u'Youtube watch history, "ythistory" keyword (requires authentication)'
1734     _VALID_URL = u'https?://www\.youtube\.com/feed/history|:ythistory'
1735     _FEED_NAME = 'history'
1736     _PERSONAL_FEED = True
1737     _PLAYLIST_TITLE = u'Youtube Watch History'
1738
1739 class YoutubeFavouritesIE(YoutubeBaseInfoExtractor):
1740     IE_NAME = u'youtube:favorites'
1741     IE_DESC = u'YouTube.com favourite videos, "ytfav" keyword (requires authentication)'
1742     _VALID_URL = r'https?://www\.youtube\.com/my_favorites|:ytfav(?:ou?rites)?'
1743     _LOGIN_REQUIRED = True
1744
1745     def _real_extract(self, url):
1746         webpage = self._download_webpage('https://www.youtube.com/my_favorites', 'Youtube Favourites videos')
1747         playlist_id = self._search_regex(r'list=(.+?)["&]', webpage, u'favourites playlist id')
1748         return self.url_result(playlist_id, 'YoutubePlaylist')
1749
1750
1751 class YoutubeTruncatedURLIE(InfoExtractor):
1752     IE_NAME = 'youtube:truncated_url'
1753     IE_DESC = False  # Do not list
1754     _VALID_URL = r'(?:https?://)?[^/]+/watch\?feature=[a-z_]+$'
1755
1756     def _real_extract(self, url):
1757         raise ExtractorError(
1758             u'Did you forget to quote the URL? Remember that & is a meta '
1759             u'character in most shells, so you want to put the URL in quotes, '
1760             u'like  youtube-dl '
1761             u'\'http://www.youtube.com/watch?feature=foo&v=BaW_jenozKc\''
1762             u' (or simply  youtube-dl BaW_jenozKc  ).',
1763             expected=True)