_ Git - youtube-dl/blob - 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     PagedList,
  31     RegexNotFoundError,
  32     unescapeHTML,
  33     unified_strdate,
  34     orderedSet,
  35     write_json_file,
  36 )
  37
  38 class YoutubeBaseInfoExtractor(InfoExtractor):
  39     """Provide base functions for Youtube extractors"""
  40     _LOGIN_URL = 'https://accounts.google.com/ServiceLogin'
  41     _LANG_URL = r'https://www.youtube.com/?hl=en&persist_hl=1&gl=US&persist_gl=1&opt_out_ackd=1'
  42     _AGE_URL = 'http://www.youtube.com/verify_age?next_url=/&gl=US&hl=en'
  43     _NETRC_MACHINE = 'youtube'
  44     # If True it will raise an error if no login info is provided
  45     _LOGIN_REQUIRED = False
  46
  47     def _set_language(self):
  48         return bool(self._download_webpage(
  49             self._LANG_URL, None,
  50             note=u'Setting language', errnote='unable to set language',
  51             fatal=False))
  52
  53     def _login(self):
  54         (username, password) = self._get_login_info()
  55         # No authentication to be performed
  56         if username is None:
  57             if self._LOGIN_REQUIRED:
  58                 raise ExtractorError(u'No login info available, needed for using %s.' % self.IE_NAME, expected=True)
  59             return False
  60
  61         login_page = self._download_webpage(
  62             self._LOGIN_URL, None,
  63             note=u'Downloading login page',
  64             errnote=u'unable to fetch login page', fatal=False)
  65         if login_page is False:
  66             return
  67
  68         galx = self._search_regex(r'(?s)<input.+?name="GALX".+?value="(.+?)"',
  69                                   login_page, u'Login GALX parameter')
  70
  71         # Log in
  72         login_form_strs = {
  73                 u'continue': u'https://www.youtube.com/signin?action_handle_signin=true&feature=sign_in_button&hl=en_US&nomobiletemp=1',
  74                 u'Email': username,
  75                 u'GALX': galx,
  76                 u'Passwd': password,
  77                 u'PersistentCookie': u'yes',
  78                 u'_utf8': u'霱',
  79                 u'bgresponse': u'js_disabled',
  80                 u'checkConnection': u'',
  81                 u'checkedDomains': u'youtube',
  82                 u'dnConn': u'',
  83                 u'pstMsg': u'0',
  84                 u'rmShown': u'1',
  85                 u'secTok': u'',
  86                 u'signIn': u'Sign in',
  87                 u'timeStmp': u'',
  88                 u'service': u'youtube',
  89                 u'uilel': u'3',
  90                 u'hl': u'en_US',
  91         }
  92         # Convert to UTF-8 *before* urlencode because Python 2.x's urlencode
  93         # chokes on unicode
  94         login_form = dict((k.encode('utf-8'), v.encode('utf-8')) for k,v in login_form_strs.items())
  95         login_data = compat_urllib_parse.urlencode(login_form).encode('ascii')
  96
  97         req = compat_urllib_request.Request(self._LOGIN_URL, login_data)
  98         login_results = self._download_webpage(
  99             req, None,
 100             note=u'Logging in', errnote=u'unable to log in', fatal=False)
 101         if login_results is False:
 102             return False
 103         if re.search(r'(?i)<form[^>]* id="gaia_loginform"', login_results) is not None:
 104             self._downloader.report_warning(u'unable to log in: bad username or password')
 105             return False
 106         return True
 107
 108     def _confirm_age(self):
 109         age_form = {
 110             'next_url': '/',
 111             'action_confirm': 'Confirm',
 112         }
 113         req = compat_urllib_request.Request(self._AGE_URL, compat_urllib_parse.urlencode(age_form))
 114
 115         self._download_webpage(
 116             req, None,
 117             note=u'Confirming age', errnote=u'Unable to confirm age')
 118         return True
 119
 120     def _real_initialize(self):
 121         if self._downloader is None:
 122             return
 123         if not self._set_language():
 124             return
 125         if not self._login():
 126             return
 127         self._confirm_age()
 128
 129
 130 class YoutubeIE(YoutubeBaseInfoExtractor, SubtitlesInfoExtractor):
 131     IE_DESC = u'YouTube.com'
 132     _VALID_URL = r"""(?x)^
 133                      (
 134                          (?:https?://|//)?                                    # http(s):// or protocol-independent URL (optional)
 135                          (?:(?:(?:(?:\w+\.)?[yY][oO][uU][tT][uU][bB][eE](?:-nocookie)?\.com/|
 136                             (?:www\.)?deturl\.com/www\.youtube\.com/|
 137                             (?:www\.)?pwnyoutube\.com|
 138                             tube\.majestyc\.net/|
 139                             youtube\.googleapis\.com/)                        # the various hostnames, with wildcard subdomains
 140                          (?:.*?\#/)?                                          # handle anchor (#/) redirect urls
 141                          (?:                                                  # the various things that can precede the ID:
 142                              (?:(?:v|embed|e)/)                               # v/ or embed/ or e/
 143                              |(?:                                             # or the v= param in all its forms
 144                                  (?:(?:watch|movie)(?:_popup)?(?:\.php)?)?    # preceding watch(_popup|.php) or nothing (like /?v=xxxx)
 145                                  (?:\?|\#!?)                                  # the params delimiter ? or # or #!
 146                                  (?:.*?&)?                                    # any other preceding param (like /?s=tuff&v=xxxx)
 147                                  v=
 148                              )
 149                          ))
 150                          |youtu\.be/                                          # just youtu.be/xxxx
 151                          )
 152                      )?                                                       # all until now is optional -> you can pass the naked ID
 153                      ([0-9A-Za-z_-]{11})                                      # here is it! the YouTube video ID
 154                      (?(1).+)?                                                # if we found the ID, everything can follow
 155                      $"""
 156     _NEXT_URL_RE = r'[\?&]next_url=([^&]+)'
 157     _formats = {
 158         '5': {'ext': 'flv', 'width': 400, 'height': 240},
 159         '6': {'ext': 'flv', 'width': 450, 'height': 270},
 160         '13': {'ext': '3gp'},
 161         '17': {'ext': '3gp', 'width': 176, 'height': 144},
 162         '18': {'ext': 'mp4', 'width': 640, 'height': 360},
 163         '22': {'ext': 'mp4', 'width': 1280, 'height': 720},
 164         '34': {'ext': 'flv', 'width': 640, 'height': 360},
 165         '35': {'ext': 'flv', 'width': 854, 'height': 480},
 166         '36': {'ext': '3gp', 'width': 320, 'height': 240},
 167         '37': {'ext': 'mp4', 'width': 1920, 'height': 1080},
 168         '38': {'ext': 'mp4', 'width': 4096, 'height': 3072},
 169         '43': {'ext': 'webm', 'width': 640, 'height': 360},
 170         '44': {'ext': 'webm', 'width': 854, 'height': 480},
 171         '45': {'ext': 'webm', 'width': 1280, 'height': 720},
 172         '46': {'ext': 'webm', 'width': 1920, 'height': 1080},
 173
 174
 175         # 3d videos
 176         '82': {'ext': 'mp4', 'height': 360, 'resolution': '360p', 'format_note': '3D', 'preference': -20},
 177         '83': {'ext': 'mp4', 'height': 480, 'resolution': '480p', 'format_note': '3D', 'preference': -20},
 178         '84': {'ext': 'mp4', 'height': 720, 'resolution': '720p', 'format_note': '3D', 'preference': -20},
 179         '85': {'ext': 'mp4', 'height': 1080, 'resolution': '1080p', 'format_note': '3D', 'preference': -20},
 180         '100': {'ext': 'webm', 'height': 360, 'resolution': '360p', 'format_note': '3D', 'preference': -20},
 181         '101': {'ext': 'webm', 'height': 480, 'resolution': '480p', 'format_note': '3D', 'preference': -20},
 182         '102': {'ext': 'webm', 'height': 720, 'resolution': '720p', 'format_note': '3D', 'preference': -20},
 183
 184         # Apple HTTP Live Streaming
 185         '92': {'ext': 'mp4', 'height': 240, 'resolution': '240p', 'format_note': 'HLS', 'preference': -10},
 186         '93': {'ext': 'mp4', 'height': 360, 'resolution': '360p', 'format_note': 'HLS', 'preference': -10},
 187         '94': {'ext': 'mp4', 'height': 480, 'resolution': '480p', 'format_note': 'HLS', 'preference': -10},
 188         '95': {'ext': 'mp4', 'height': 720, 'resolution': '720p', 'format_note': 'HLS', 'preference': -10},
 189         '96': {'ext': 'mp4', 'height': 1080, 'resolution': '1080p', 'format_note': 'HLS', 'preference': -10},
 190         '132': {'ext': 'mp4', 'height': 240, 'resolution': '240p', 'format_note': 'HLS', 'preference': -10},
 191         '151': {'ext': 'mp4', 'height': 72, 'resolution': '72p', 'format_note': 'HLS', 'preference': -10},
 192
 193         # DASH mp4 video
 194         '133': {'ext': 'mp4', 'height': 240, 'resolution': '240p', 'format_note': 'DASH video', 'preference': -40},
 195         '134': {'ext': 'mp4', 'height': 360, 'resolution': '360p', 'format_note': 'DASH video', 'preference': -40},
 196         '135': {'ext': 'mp4', 'height': 480, 'resolution': '480p', 'format_note': 'DASH video', 'preference': -40},
 197         '136': {'ext': 'mp4', 'height': 720, 'resolution': '720p', 'format_note': 'DASH video', 'preference': -40},
 198         '137': {'ext': 'mp4', 'height': 1080, 'resolution': '1080p', 'format_note': 'DASH video', 'preference': -40},
 199         '138': {'ext': 'mp4', 'height': 1081, 'resolution': '>1080p', 'format_note': 'DASH video', 'preference': -40},
 200         '160': {'ext': 'mp4', 'height': 192, 'resolution': '192p', 'format_note': 'DASH video', 'preference': -40},
 201         '264': {'ext': 'mp4', 'height': 1080, 'resolution': '1080p', 'format_note': 'DASH video', 'preference': -40},
 202
 203         # Dash mp4 audio
 204         '139': {'ext': 'm4a', 'format_note': 'DASH audio', 'vcodec': 'none', 'abr': 48, 'preference': -50},
 205         '140': {'ext': 'm4a', 'format_note': 'DASH audio', 'vcodec': 'none', 'abr': 128, 'preference': -50},
 206         '141': {'ext': 'm4a', 'format_note': 'DASH audio', 'vcodec': 'none', 'abr': 256, 'preference': -50},
 207
 208         # Dash webm
 209         '242': {'ext': 'webm', 'height': 240, 'resolution': '240p', 'format_note': 'DASH webm', 'preference': -40},
 210         '243': {'ext': 'webm', 'height': 360, 'resolution': '360p', 'format_note': 'DASH webm', 'preference': -40},
 211         '244': {'ext': 'webm', 'height': 480, 'resolution': '480p', 'format_note': 'DASH webm', 'preference': -40},
 212         '245': {'ext': 'webm', 'height': 480, 'resolution': '480p', 'format_note': 'DASH webm', 'preference': -40},
 213         '246': {'ext': 'webm', 'height': 480, 'resolution': '480p', 'format_note': 'DASH webm', 'preference': -40},
 214         '247': {'ext': 'webm', 'height': 720, 'resolution': '720p', 'format_note': 'DASH webm', 'preference': -40},
 215         '248': {'ext': 'webm', 'height': 1080, 'resolution': '1080p', 'format_note': 'DASH webm', 'preference': -40},
 216
 217         # Dash webm audio
 218         '171': {'ext': 'webm', 'vcodec': 'none', 'format_note': 'DASH webm audio', 'abr': 48, 'preference': -50},
 219         '172': {'ext': 'webm', 'vcodec': 'none', 'format_note': 'DASH webm audio', 'abr': 256, 'preference': -50},
 220
 221         # RTMP (unnamed)
 222         '_rtmp': {'protocol': 'rtmp'},
 223     }
 224
 225     IE_NAME = u'youtube'
 226     _TESTS = [
 227         {
 228             u"url":  u"http://www.youtube.com/watch?v=BaW_jenozKc",
 229             u"file":  u"BaW_jenozKc.mp4",
 230             u"info_dict": {
 231                 u"title": u"youtube-dl test video \"'/\\ä↭𝕐",
 232                 u"uploader": u"Philipp Hagemeister",
 233                 u"uploader_id": u"phihag",
 234                 u"upload_date": u"20121002",
 235                 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 ."
 236             }
 237         },
 238         {
 239             u"url":  u"http://www.youtube.com/watch?v=UxxajLWwzqY",
 240             u"file":  u"UxxajLWwzqY.mp4",
 241             u"note": u"Test generic use_cipher_signature video (#897)",
 242             u"info_dict": {
 243                 u"upload_date": u"20120506",
 244                 u"title": u"Icona Pop - I Love It (feat. Charli XCX) [OFFICIAL VIDEO]",
 245                 u"description": u"md5:5b292926389560516e384ac437c0ec07",
 246                 u"uploader": u"Icona Pop",
 247                 u"uploader_id": u"IconaPop"
 248             }
 249         },
 250         {
 251             u"url":  u"https://www.youtube.com/watch?v=07FYdnEawAQ",
 252             u"file":  u"07FYdnEawAQ.mp4",
 253             u"note": u"Test VEVO video with age protection (#956)",
 254             u"info_dict": {
 255                 u"upload_date": u"20130703",
 256                 u"title": u"Justin Timberlake - Tunnel Vision (Explicit)",
 257                 u"description": u"md5:64249768eec3bc4276236606ea996373",
 258                 u"uploader": u"justintimberlakeVEVO",
 259                 u"uploader_id": u"justintimberlakeVEVO"
 260             }
 261         },
 262         {
 263             u"url":  u"//www.YouTube.com/watch?v=yZIXLfi8CZQ",
 264             u"file":  u"yZIXLfi8CZQ.mp4",
 265             u"note": u"Embed-only video (#1746)",
 266             u"info_dict": {
 267                 u"upload_date": u"20120608",
 268                 u"title": u"Principal Sexually Assaults A Teacher - Episode 117 - 8th June 2012",
 269                 u"description": u"md5:09b78bd971f1e3e289601dfba15ca4f7",
 270                 u"uploader": u"SET India",
 271                 u"uploader_id": u"setindia"
 272             }
 273         },
 274     ]
 275
 276
 277     @classmethod
 278     def suitable(cls, url):
 279         """Receives a URL and returns True if suitable for this IE."""
 280         if YoutubePlaylistIE.suitable(url): return False
 281         return re.match(cls._VALID_URL, url) is not None
 282
 283     def __init__(self, *args, **kwargs):
 284         super(YoutubeIE, self).__init__(*args, **kwargs)
 285         self._player_cache = {}
 286
 287     def report_video_info_webpage_download(self, video_id):
 288         """Report attempt to download video info webpage."""
 289         self.to_screen(u'%s: Downloading video info webpage' % video_id)
 290
 291     def report_information_extraction(self, video_id):
 292         """Report attempt to extract video information."""
 293         self.to_screen(u'%s: Extracting video information' % video_id)
 294
 295     def report_unavailable_format(self, video_id, format):
 296         """Report extracted video URL."""
 297         self.to_screen(u'%s: Format %s not available' % (video_id, format))
 298
 299     def report_rtmp_download(self):
 300         """Indicate the download will use the RTMP protocol."""
 301         self.to_screen(u'RTMP download detected')
 302
 303     def _extract_signature_function(self, video_id, player_url, slen):
 304         id_m = re.match(r'.*-(?P<id>[a-zA-Z0-9_-]+)\.(?P<ext>[a-z]+)$',
 305                         player_url)
 306         player_type = id_m.group('ext')
 307         player_id = id_m.group('id')
 308
 309         # Read from filesystem cache
 310         func_id = '%s_%s_%d' % (player_type, player_id, slen)
 311         assert os.path.basename(func_id) == func_id
 312         cache_dir = get_cachedir(self._downloader.params)
 313
 314         cache_enabled = cache_dir is not None
 315         if cache_enabled:
 316             cache_fn = os.path.join(os.path.expanduser(cache_dir),
 317                                     u'youtube-sigfuncs',
 318                                     func_id + '.json')
 319             try:
 320                 with io.open(cache_fn, 'r', encoding='utf-8') as cachef:
 321                     cache_spec = json.load(cachef)
 322                 return lambda s: u''.join(s[i] for i in cache_spec)
 323             except IOError:
 324                 pass  # No cache available
 325
 326         if player_type == 'js':
 327             code = self._download_webpage(
 328                 player_url, video_id,
 329                 note=u'Downloading %s player %s' % (player_type, player_id),
 330                 errnote=u'Download of %s failed' % player_url)
 331             res = self._parse_sig_js(code)
 332         elif player_type == 'swf':
 333             urlh = self._request_webpage(
 334                 player_url, video_id,
 335                 note=u'Downloading %s player %s' % (player_type, player_id),
 336                 errnote=u'Download of %s failed' % player_url)
 337             code = urlh.read()
 338             res = self._parse_sig_swf(code)
 339         else:
 340             assert False, 'Invalid player type %r' % player_type
 341
 342         if cache_enabled:
 343             try:
 344                 test_string = u''.join(map(compat_chr, range(slen)))
 345                 cache_res = res(test_string)
 346                 cache_spec = [ord(c) for c in cache_res]
 347                 try:
 348                     os.makedirs(os.path.dirname(cache_fn))
 349                 except OSError as ose:
 350                     if ose.errno != errno.EEXIST:
 351                         raise
 352                 write_json_file(cache_spec, cache_fn)
 353             except Exception:
 354                 tb = traceback.format_exc()
 355                 self._downloader.report_warning(
 356                     u'Writing cache to %r failed: %s' % (cache_fn, tb))
 357
 358         return res
 359
 360     def _print_sig_code(self, func, slen):
 361         def gen_sig_code(idxs):
 362             def _genslice(start, end, step):
 363                 starts = u'' if start == 0 else str(start)
 364                 ends = (u':%d' % (end+step)) if end + step >= 0 else u':'
 365                 steps = u'' if step == 1 else (u':%d' % step)
 366                 return u's[%s%s%s]' % (starts, ends, steps)
 367
 368             step = None
 369             start = '(Never used)'  # Quelch pyflakes warnings - start will be
 370                                     # set as soon as step is set
 371             for i, prev in zip(idxs[1:], idxs[:-1]):
 372                 if step is not None:
 373                     if i - prev == step:
 374                         continue
 375                     yield _genslice(start, prev, step)
 376                     step = None
 377                     continue
 378                 if i - prev in [-1, 1]:
 379                     step = i - prev
 380                     start = prev
 381                     continue
 382                 else:
 383                     yield u's[%d]' % prev
 384             if step is None:
 385                 yield u's[%d]' % i
 386             else:
 387                 yield _genslice(start, i, step)
 388
 389         test_string = u''.join(map(compat_chr, range(slen)))
 390         cache_res = func(test_string)
 391         cache_spec = [ord(c) for c in cache_res]
 392         expr_code = u' + '.join(gen_sig_code(cache_spec))
 393         code = u'if len(s) == %d:\n    return %s\n' % (slen, expr_code)
 394         self.to_screen(u'Extracted signature function:\n' + code)
 395
 396     def _parse_sig_js(self, jscode):
 397         funcname = self._search_regex(
 398             r'signature=([a-zA-Z]+)', jscode,
 399             u'Initial JS player signature function name')
 400
 401         functions = {}
 402
 403         def argidx(varname):
 404             return string.lowercase.index(varname)
 405
 406         def interpret_statement(stmt, local_vars, allow_recursion=20):
 407             if allow_recursion < 0:
 408                 raise ExtractorError(u'Recursion limit reached')
 409
 410             if stmt.startswith(u'var '):
 411                 stmt = stmt[len(u'var '):]
 412             ass_m = re.match(r'^(?P<out>[a-z]+)(?:\[(?P<index>[^\]]+)\])?' +
 413                              r'=(?P<expr>.*)$', stmt)
 414             if ass_m:
 415                 if ass_m.groupdict().get('index'):
 416                     def assign(val):
 417                         lvar = local_vars[ass_m.group('out')]
 418                         idx = interpret_expression(ass_m.group('index'),
 419                                                    local_vars, allow_recursion)
 420                         assert isinstance(idx, int)
 421                         lvar[idx] = val
 422                         return val
 423                     expr = ass_m.group('expr')
 424                 else:
 425                     def assign(val):
 426                         local_vars[ass_m.group('out')] = val
 427                         return val
 428                     expr = ass_m.group('expr')
 429             elif stmt.startswith(u'return '):
 430                 assign = lambda v: v
 431                 expr = stmt[len(u'return '):]
 432             else:
 433                 raise ExtractorError(
 434                     u'Cannot determine left side of statement in %r' % stmt)
 435
 436             v = interpret_expression(expr, local_vars, allow_recursion)
 437             return assign(v)
 438
 439         def interpret_expression(expr, local_vars, allow_recursion):
 440             if expr.isdigit():
 441                 return int(expr)
 442
 443             if expr.isalpha():
 444                 return local_vars[expr]
 445
 446             m = re.match(r'^(?P<in>[a-z]+)\.(?P<member>.*)$', expr)
 447             if m:
 448                 member = m.group('member')
 449                 val = local_vars[m.group('in')]
 450                 if member == 'split("")':
 451                     return list(val)
 452                 if member == 'join("")':
 453                     return u''.join(val)
 454                 if member == 'length':
 455                     return len(val)
 456                 if member == 'reverse()':
 457                     return val[::-1]
 458                 slice_m = re.match(r'slice\((?P<idx>.*)\)', member)
 459                 if slice_m:
 460                     idx = interpret_expression(
 461                         slice_m.group('idx'), local_vars, allow_recursion-1)
 462                     return val[idx:]
 463
 464             m = re.match(
 465                 r'^(?P<in>[a-z]+)\[(?P<idx>.+)\]$', expr)
 466             if m:
 467                 val = local_vars[m.group('in')]
 468                 idx = interpret_expression(m.group('idx'), local_vars,
 469                                            allow_recursion-1)
 470                 return val[idx]
 471
 472             m = re.match(r'^(?P<a>.+?)(?P<op>[%])(?P<b>.+?)$', expr)
 473             if m:
 474                 a = interpret_expression(m.group('a'),
 475                                          local_vars, allow_recursion)
 476                 b = interpret_expression(m.group('b'),
 477                                          local_vars, allow_recursion)
 478                 return a % b
 479
 480             m = re.match(
 481                 r'^(?P<func>[a-zA-Z]+)\((?P<args>[a-z0-9,]+)\)$', expr)
 482             if m:
 483                 fname = m.group('func')
 484                 if fname not in functions:
 485                     functions[fname] = extract_function(fname)
 486                 argvals = [int(v) if v.isdigit() else local_vars[v]
 487                            for v in m.group('args').split(',')]
 488                 return functions[fname](argvals)
 489             raise ExtractorError(u'Unsupported JS expression %r' % expr)
 490
 491         def extract_function(funcname):
 492             func_m = re.search(
 493                 r'function ' + re.escape(funcname) +
 494                 r'\((?P<args>[a-z,]+)\){(?P<code>[^}]+)}',
 495                 jscode)
 496             argnames = func_m.group('args').split(',')
 497
 498             def resf(args):
 499                 local_vars = dict(zip(argnames, args))
 500                 for stmt in func_m.group('code').split(';'):
 501                     res = interpret_statement(stmt, local_vars)
 502                 return res
 503             return resf
 504
 505         initial_function = extract_function(funcname)
 506         return lambda s: initial_function([s])
 507
 508     def _parse_sig_swf(self, file_contents):
 509         if file_contents[1:3] != b'WS':
 510             raise ExtractorError(
 511                 u'Not an SWF file; header is %r' % file_contents[:3])
 512         if file_contents[:1] == b'C':
 513             content = zlib.decompress(file_contents[8:])
 514         else:
 515             raise NotImplementedError(u'Unsupported compression format %r' %
 516                                       file_contents[:1])
 517
 518         def extract_tags(content):
 519             pos = 0
 520             while pos < len(content):
 521                 header16 = struct.unpack('<H', content[pos:pos+2])[0]
 522                 pos += 2
 523                 tag_code = header16 >> 6
 524                 tag_len = header16 & 0x3f
 525                 if tag_len == 0x3f:
 526                     tag_len = struct.unpack('<I', content[pos:pos+4])[0]
 527                     pos += 4
 528                 assert pos+tag_len <= len(content)
 529                 yield (tag_code, content[pos:pos+tag_len])
 530                 pos += tag_len
 531
 532         code_tag = next(tag
 533                         for tag_code, tag in extract_tags(content)
 534                         if tag_code == 82)
 535         p = code_tag.index(b'\0', 4) + 1
 536         code_reader = io.BytesIO(code_tag[p:])
 537
 538         # Parse ABC (AVM2 ByteCode)
 539         def read_int(reader=None):
 540             if reader is None:
 541                 reader = code_reader
 542             res = 0
 543             shift = 0
 544             for _ in range(5):
 545                 buf = reader.read(1)
 546                 assert len(buf) == 1
 547                 b = struct.unpack('<B', buf)[0]
 548                 res = res | ((b & 0x7f) << shift)
 549                 if b & 0x80 == 0:
 550                     break
 551                 shift += 7
 552             return res
 553
 554         def u30(reader=None):
 555             res = read_int(reader)
 556             assert res & 0xf0000000 == 0
 557             return res
 558         u32 = read_int
 559
 560         def s32(reader=None):
 561             v = read_int(reader)
 562             if v & 0x80000000 != 0:
 563                 v = - ((v ^ 0xffffffff) + 1)
 564             return v
 565
 566         def read_string(reader=None):
 567             if reader is None:
 568                 reader = code_reader
 569             slen = u30(reader)
 570             resb = reader.read(slen)
 571             assert len(resb) == slen
 572             return resb.decode('utf-8')
 573
 574         def read_bytes(count, reader=None):
 575             if reader is None:
 576                 reader = code_reader
 577             resb = reader.read(count)
 578             assert len(resb) == count
 579             return resb
 580
 581         def read_byte(reader=None):
 582             resb = read_bytes(1, reader=reader)
 583             res = struct.unpack('<B', resb)[0]
 584             return res
 585
 586         # minor_version + major_version
 587         read_bytes(2 + 2)
 588
 589         # Constant pool
 590         int_count = u30()
 591         for _c in range(1, int_count):
 592             s32()
 593         uint_count = u30()
 594         for _c in range(1, uint_count):
 595             u32()
 596         double_count = u30()
 597         read_bytes((double_count-1) * 8)
 598         string_count = u30()
 599         constant_strings = [u'']
 600         for _c in range(1, string_count):
 601             s = read_string()
 602             constant_strings.append(s)
 603         namespace_count = u30()
 604         for _c in range(1, namespace_count):
 605             read_bytes(1)  # kind
 606             u30()  # name
 607         ns_set_count = u30()
 608         for _c in range(1, ns_set_count):
 609             count = u30()
 610             for _c2 in range(count):
 611                 u30()
 612         multiname_count = u30()
 613         MULTINAME_SIZES = {
 614             0x07: 2,  # QName
 615             0x0d: 2,  # QNameA
 616             0x0f: 1,  # RTQName
 617             0x10: 1,  # RTQNameA
 618             0x11: 0,  # RTQNameL
 619             0x12: 0,  # RTQNameLA
 620             0x09: 2,  # Multiname
 621             0x0e: 2,  # MultinameA
 622             0x1b: 1,  # MultinameL
 623             0x1c: 1,  # MultinameLA
 624         }
 625         multinames = [u'']
 626         for _c in range(1, multiname_count):
 627             kind = u30()
 628             assert kind in MULTINAME_SIZES, u'Invalid multiname kind %r' % kind
 629             if kind == 0x07:
 630                 u30()  # namespace_idx
 631                 name_idx = u30()
 632                 multinames.append(constant_strings[name_idx])
 633             else:
 634                 multinames.append('[MULTINAME kind: %d]' % kind)
 635                 for _c2 in range(MULTINAME_SIZES[kind]):
 636                     u30()
 637
 638         # Methods
 639         method_count = u30()
 640         MethodInfo = collections.namedtuple(
 641             'MethodInfo',
 642             ['NEED_ARGUMENTS', 'NEED_REST'])
 643         method_infos = []
 644         for method_id in range(method_count):
 645             param_count = u30()
 646             u30()  # return type
 647             for _ in range(param_count):
 648                 u30()  # param type
 649             u30()  # name index (always 0 for youtube)
 650             flags = read_byte()
 651             if flags & 0x08 != 0:
 652                 # Options present
 653                 option_count = u30()
 654                 for c in range(option_count):
 655                     u30()  # val
 656                     read_bytes(1)  # kind
 657             if flags & 0x80 != 0:
 658                 # Param names present
 659                 for _ in range(param_count):
 660                     u30()  # param name
 661             mi = MethodInfo(flags & 0x01 != 0, flags & 0x04 != 0)
 662             method_infos.append(mi)
 663
 664         # Metadata
 665         metadata_count = u30()
 666         for _c in range(metadata_count):
 667             u30()  # name
 668             item_count = u30()
 669             for _c2 in range(item_count):
 670                 u30()  # key
 671                 u30()  # value
 672
 673         def parse_traits_info():
 674             trait_name_idx = u30()
 675             kind_full = read_byte()
 676             kind = kind_full & 0x0f
 677             attrs = kind_full >> 4
 678             methods = {}
 679             if kind in [0x00, 0x06]:  # Slot or Const
 680                 u30()  # Slot id
 681                 u30()  # type_name_idx
 682                 vindex = u30()
 683                 if vindex != 0:
 684                     read_byte()  # vkind
 685             elif kind in [0x01, 0x02, 0x03]:  # Method / Getter / Setter
 686                 u30()  # disp_id
 687                 method_idx = u30()
 688                 methods[multinames[trait_name_idx]] = method_idx
 689             elif kind == 0x04:  # Class
 690                 u30()  # slot_id
 691                 u30()  # classi
 692             elif kind == 0x05:  # Function
 693                 u30()  # slot_id
 694                 function_idx = u30()
 695                 methods[function_idx] = multinames[trait_name_idx]
 696             else:
 697                 raise ExtractorError(u'Unsupported trait kind %d' % kind)
 698
 699             if attrs & 0x4 != 0:  # Metadata present
 700                 metadata_count = u30()
 701                 for _c3 in range(metadata_count):
 702                     u30()  # metadata index
 703
 704             return methods
 705
 706         # Classes
 707         TARGET_CLASSNAME = u'SignatureDecipher'
 708         searched_idx = multinames.index(TARGET_CLASSNAME)
 709         searched_class_id = None
 710         class_count = u30()
 711         for class_id in range(class_count):
 712             name_idx = u30()
 713             if name_idx == searched_idx:
 714                 # We found the class we're looking for!
 715                 searched_class_id = class_id
 716             u30()  # super_name idx
 717             flags = read_byte()
 718             if flags & 0x08 != 0:  # Protected namespace is present
 719                 u30()  # protected_ns_idx
 720             intrf_count = u30()
 721             for _c2 in range(intrf_count):
 722                 u30()
 723             u30()  # iinit
 724             trait_count = u30()
 725             for _c2 in range(trait_count):
 726                 parse_traits_info()
 727
 728         if searched_class_id is None:
 729             raise ExtractorError(u'Target class %r not found' %
 730                                  TARGET_CLASSNAME)
 731
 732         method_names = {}
 733         method_idxs = {}
 734         for class_id in range(class_count):
 735             u30()  # cinit
 736             trait_count = u30()
 737             for _c2 in range(trait_count):
 738                 trait_methods = parse_traits_info()
 739                 if class_id == searched_class_id:
 740                     method_names.update(trait_methods.items())
 741                     method_idxs.update(dict(
 742                         (idx, name)
 743                         for name, idx in trait_methods.items()))
 744
 745         # Scripts
 746         script_count = u30()
 747         for _c in range(script_count):
 748             u30()  # init
 749             trait_count = u30()
 750             for _c2 in range(trait_count):
 751                 parse_traits_info()
 752
 753         # Method bodies
 754         method_body_count = u30()
 755         Method = collections.namedtuple('Method', ['code', 'local_count'])
 756         methods = {}
 757         for _c in range(method_body_count):
 758             method_idx = u30()
 759             u30()  # max_stack
 760             local_count = u30()
 761             u30()  # init_scope_depth
 762             u30()  # max_scope_depth
 763             code_length = u30()
 764             code = read_bytes(code_length)
 765             if method_idx in method_idxs:
 766                 m = Method(code, local_count)
 767                 methods[method_idxs[method_idx]] = m
 768             exception_count = u30()
 769             for _c2 in range(exception_count):
 770                 u30()  # from
 771                 u30()  # to
 772                 u30()  # target
 773                 u30()  # exc_type
 774                 u30()  # var_name
 775             trait_count = u30()
 776             for _c2 in range(trait_count):
 777                 parse_traits_info()
 778
 779         assert p + code_reader.tell() == len(code_tag)
 780         assert len(methods) == len(method_idxs)
 781
 782         method_pyfunctions = {}
 783
 784         def extract_function(func_name):
 785             if func_name in method_pyfunctions:
 786                 return method_pyfunctions[func_name]
 787             if func_name not in methods:
 788                 raise ExtractorError(u'Cannot find function %r' % func_name)
 789             m = methods[func_name]
 790
 791             def resfunc(args):
 792                 registers = ['(this)'] + list(args) + [None] * m.local_count
 793                 stack = []
 794                 coder = io.BytesIO(m.code)
 795                 while True:
 796                     opcode = struct.unpack('!B', coder.read(1))[0]
 797                     if opcode == 36:  # pushbyte
 798                         v = struct.unpack('!B', coder.read(1))[0]
 799                         stack.append(v)
 800                     elif opcode == 44:  # pushstring
 801                         idx = u30(coder)
 802                         stack.append(constant_strings[idx])
 803                     elif opcode == 48:  # pushscope
 804                         # We don't implement the scope register, so we'll just
 805                         # ignore the popped value
 806                         stack.pop()
 807                     elif opcode == 70:  # callproperty
 808                         index = u30(coder)
 809                         mname = multinames[index]
 810                         arg_count = u30(coder)
 811                         args = list(reversed(
 812                             [stack.pop() for _ in range(arg_count)]))
 813                         obj = stack.pop()
 814                         if mname == u'split':
 815                             assert len(args) == 1
 816                             assert isinstance(args[0], compat_str)
 817                             assert isinstance(obj, compat_str)
 818                             if args[0] == u'':
 819                                 res = list(obj)
 820                             else:
 821                                 res = obj.split(args[0])
 822                             stack.append(res)
 823                         elif mname == u'slice':
 824                             assert len(args) == 1
 825                             assert isinstance(args[0], int)
 826                             assert isinstance(obj, list)
 827                             res = obj[args[0]:]
 828                             stack.append(res)
 829                         elif mname == u'join':
 830                             assert len(args) == 1
 831                             assert isinstance(args[0], compat_str)
 832                             assert isinstance(obj, list)
 833                             res = args[0].join(obj)
 834                             stack.append(res)
 835                         elif mname in method_pyfunctions:
 836                             stack.append(method_pyfunctions[mname](args))
 837                         else:
 838                             raise NotImplementedError(
 839                                 u'Unsupported property %r on %r'
 840                                 % (mname, obj))
 841                     elif opcode == 72:  # returnvalue
 842                         res = stack.pop()
 843                         return res
 844                     elif opcode == 79:  # callpropvoid
 845                         index = u30(coder)
 846                         mname = multinames[index]
 847                         arg_count = u30(coder)
 848                         args = list(reversed(
 849                             [stack.pop() for _ in range(arg_count)]))
 850                         obj = stack.pop()
 851                         if mname == u'reverse':
 852                             assert isinstance(obj, list)
 853                             obj.reverse()
 854                         else:
 855                             raise NotImplementedError(
 856                                 u'Unsupported (void) property %r on %r'
 857                                 % (mname, obj))
 858                     elif opcode == 93:  # findpropstrict
 859                         index = u30(coder)
 860                         mname = multinames[index]
 861                         res = extract_function(mname)
 862                         stack.append(res)
 863                     elif opcode == 97:  # setproperty
 864                         index = u30(coder)
 865                         value = stack.pop()
 866                         idx = stack.pop()
 867                         obj = stack.pop()
 868                         assert isinstance(obj, list)
 869                         assert isinstance(idx, int)
 870                         obj[idx] = value
 871                     elif opcode == 98:  # getlocal
 872                         index = u30(coder)
 873                         stack.append(registers[index])
 874                     elif opcode == 99:  # setlocal
 875                         index = u30(coder)
 876                         value = stack.pop()
 877                         registers[index] = value
 878                     elif opcode == 102:  # getproperty
 879                         index = u30(coder)
 880                         pname = multinames[index]
 881                         if pname == u'length':
 882                             obj = stack.pop()
 883                             assert isinstance(obj, list)
 884                             stack.append(len(obj))
 885                         else:  # Assume attribute access
 886                             idx = stack.pop()
 887                             assert isinstance(idx, int)
 888                             obj = stack.pop()
 889                             assert isinstance(obj, list)
 890                             stack.append(obj[idx])
 891                     elif opcode == 128:  # coerce
 892                         u30(coder)
 893                     elif opcode == 133:  # coerce_s
 894                         assert isinstance(stack[-1], (type(None), compat_str))
 895                     elif opcode == 164:  # modulo
 896                         value2 = stack.pop()
 897                         value1 = stack.pop()
 898                         res = value1 % value2
 899                         stack.append(res)
 900                     elif opcode == 208:  # getlocal_0
 901                         stack.append(registers[0])
 902                     elif opcode == 209:  # getlocal_1
 903                         stack.append(registers[1])
 904                     elif opcode == 210:  # getlocal_2
 905                         stack.append(registers[2])
 906                     elif opcode == 211:  # getlocal_3
 907                         stack.append(registers[3])
 908                     elif opcode == 214:  # setlocal_2
 909                         registers[2] = stack.pop()
 910                     elif opcode == 215:  # setlocal_3
 911                         registers[3] = stack.pop()
 912                     else:
 913                         raise NotImplementedError(
 914                             u'Unsupported opcode %d' % opcode)
 915
 916             method_pyfunctions[func_name] = resfunc
 917             return resfunc
 918
 919         initial_function = extract_function(u'decipher')
 920         return lambda s: initial_function([s])
 921
 922     def _decrypt_signature(self, s, video_id, player_url, age_gate=False):
 923         """Turn the encrypted s field into a working signature"""
 924
 925         if player_url is not None:
 926             if player_url.startswith(u'//'):
 927                 player_url = u'https:' + player_url
 928             try:
 929                 player_id = (player_url, len(s))
 930                 if player_id not in self._player_cache:
 931                     func = self._extract_signature_function(
 932                         video_id, player_url, len(s)
 933                     )
 934                     self._player_cache[player_id] = func
 935                 func = self._player_cache[player_id]
 936                 if self._downloader.params.get('youtube_print_sig_code'):
 937                     self._print_sig_code(func, len(s))
 938                 return func(s)
 939             except Exception:
 940                 tb = traceback.format_exc()
 941                 self._downloader.report_warning(
 942                     u'Automatic signature extraction failed: ' + tb)
 943
 944             self._downloader.report_warning(
 945                 u'Warning: Falling back to static signature algorithm')
 946
 947         return self._static_decrypt_signature(
 948             s, video_id, player_url, age_gate)
 949
 950     def _static_decrypt_signature(self, s, video_id, player_url, age_gate):
 951         if age_gate:
 952             # The videos with age protection use another player, so the
 953             # algorithms can be different.
 954             if len(s) == 86:
 955                 return s[2:63] + s[82] + s[64:82] + s[63]
 956
 957         if len(s) == 93:
 958             return s[86:29:-1] + s[88] + s[28:5:-1]
 959         elif len(s) == 92:
 960             return s[25] + s[3:25] + s[0] + s[26:42] + s[79] + s[43:79] + s[91] + s[80:83]
 961         elif len(s) == 91:
 962             return s[84:27:-1] + s[86] + s[26:5:-1]
 963         elif len(s) == 90:
 964             return s[25] + s[3:25] + s[2] + s[26:40] + s[77] + s[41:77] + s[89] + s[78:81]
 965         elif len(s) == 89:
 966             return s[84:78:-1] + s[87] + s[77:60:-1] + s[0] + s[59:3:-1]
 967         elif len(s) == 88:
 968             return s[7:28] + s[87] + s[29:45] + s[55] + s[46:55] + s[2] + s[56:87] + s[28]
 969         elif len(s) == 87:
 970             return s[6:27] + s[4] + s[28:39] + s[27] + s[40:59] + s[2] + s[60:]
 971         elif len(s) == 86:
 972             return s[80:72:-1] + s[16] + s[71:39:-1] + s[72] + s[38:16:-1] + s[82] + s[15::-1]
 973         elif len(s) == 85:
 974             return s[3:11] + s[0] + s[12:55] + s[84] + s[56:84]
 975         elif len(s) == 84:
 976             return s[78:70:-1] + s[14] + s[69:37:-1] + s[70] + s[36:14:-1] + s[80] + s[:14][::-1]
 977         elif len(s) == 83:
 978             return s[80:63:-1] + s[0] + s[62:0:-1] + s[63]
 979         elif len(s) == 82:
 980             return s[80:37:-1] + s[7] + s[36:7:-1] + s[0] + s[6:0:-1] + s[37]
 981         elif len(s) == 81:
 982             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]
 983         elif len(s) == 80:
 984             return s[1:19] + s[0] + s[20:68] + s[19] + s[69:80]
 985         elif len(s) == 79:
 986             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]
 987
 988         else:
 989             raise ExtractorError(u'Unable to decrypt signature, key length %d not supported; retrying might work' % (len(s)))
 990
 991     def _get_available_subtitles(self, video_id, webpage):
 992         try:
 993             sub_list = self._download_webpage(
 994                 'http://video.google.com/timedtext?hl=en&type=list&v=%s' % video_id,
 995                 video_id, note=False)
 996         except ExtractorError as err:
 997             self._downloader.report_warning(u'unable to download video subtitles: %s' % compat_str(err))
 998             return {}
 999         lang_list = re.findall(r'name="([^"]*)"[^>]+lang_code="([\w\-]+)"', sub_list)
1000
1001         sub_lang_list = {}
1002         for l in lang_list:
1003             lang = l[1]
1004             params = compat_urllib_parse.urlencode({
1005                 'lang': lang,
1006                 'v': video_id,
1007                 'fmt': self._downloader.params.get('subtitlesformat', 'srt'),
1008                 'name': unescapeHTML(l[0]).encode('utf-8'),
1009             })
1010             url = u'http://www.youtube.com/api/timedtext?' + params
1011             sub_lang_list[lang] = url
1012         if not sub_lang_list:
1013             self._downloader.report_warning(u'video doesn\'t have subtitles')
1014             return {}
1015         return sub_lang_list
1016
1017     def _get_available_automatic_caption(self, video_id, webpage):
1018         """We need the webpage for getting the captions url, pass it as an
1019            argument to speed up the process."""
1020         sub_format = self._downloader.params.get('subtitlesformat', 'srt')
1021         self.to_screen(u'%s: Looking for automatic captions' % video_id)
1022         mobj = re.search(r';ytplayer.config = ({.*?});', webpage)
1023         err_msg = u'Couldn\'t find automatic captions for %s' % video_id
1024         if mobj is None:
1025             self._downloader.report_warning(err_msg)
1026             return {}
1027         player_config = json.loads(mobj.group(1))
1028         try:
1029             args = player_config[u'args']
1030             caption_url = args[u'ttsurl']
1031             timestamp = args[u'timestamp']
1032             # We get the available subtitles
1033             list_params = compat_urllib_parse.urlencode({
1034                 'type': 'list',
1035                 'tlangs': 1,
1036                 'asrs': 1,
1037             })
1038             list_url = caption_url + '&' + list_params
1039             caption_list = self._download_xml(list_url, video_id)
1040             original_lang_node = caption_list.find('track')
1041             if original_lang_node is None or original_lang_node.attrib.get('kind') != 'asr' :
1042                 self._downloader.report_warning(u'Video doesn\'t have automatic captions')
1043                 return {}
1044             original_lang = original_lang_node.attrib['lang_code']
1045
1046             sub_lang_list = {}
1047             for lang_node in caption_list.findall('target'):
1048                 sub_lang = lang_node.attrib['lang_code']
1049                 params = compat_urllib_parse.urlencode({
1050                     'lang': original_lang,
1051                     'tlang': sub_lang,
1052                     'fmt': sub_format,
1053                     'ts': timestamp,
1054                     'kind': 'asr',
1055                 })
1056                 sub_lang_list[sub_lang] = caption_url + '&' + params
1057             return sub_lang_list
1058         # An extractor error can be raise by the download process if there are
1059         # no automatic captions but there are subtitles
1060         except (KeyError, ExtractorError):
1061             self._downloader.report_warning(err_msg)
1062             return {}
1063
1064     def _extract_id(self, url):
1065         mobj = re.match(self._VALID_URL, url, re.VERBOSE)
1066         if mobj is None:
1067             raise ExtractorError(u'Invalid URL: %s' % url)
1068         video_id = mobj.group(2)
1069         return video_id
1070
1071     def _get_video_url_list(self, url_map):
1072         """
1073         Transform a dictionary in the format {itag:url} to a list of (itag, url)
1074         with the requested formats.
1075         """
1076         existing_formats = [x for x in self._formats if x in url_map]
1077         if len(existing_formats) == 0:
1078             raise ExtractorError(u'no known formats available for video')
1079         video_url_list = [(f, url_map[f]) for f in existing_formats] # All formats
1080         video_url_list.reverse() # order worst to best
1081         return video_url_list
1082
1083     def _extract_from_m3u8(self, manifest_url, video_id):
1084         url_map = {}
1085         def _get_urls(_manifest):
1086             lines = _manifest.split('\n')
1087             urls = filter(lambda l: l and not l.startswith('#'),
1088                             lines)
1089             return urls
1090         manifest = self._download_webpage(manifest_url, video_id, u'Downloading formats manifest')
1091         formats_urls = _get_urls(manifest)
1092         for format_url in formats_urls:
1093             itag = self._search_regex(r'itag/(\d+?)/', format_url, 'itag')
1094             url_map[itag] = format_url
1095         return url_map
1096
1097     def _extract_annotations(self, video_id):
1098         url = 'https://www.youtube.com/annotations_invideo?features=1&legacy=1&video_id=%s' % video_id
1099         return self._download_webpage(url, video_id, note=u'Searching for annotations.', errnote=u'Unable to download video annotations.')
1100
1101     def _real_extract(self, url):
1102         # Extract original video URL from URL with redirection, like age verification, using next_url parameter
1103         mobj = re.search(self._NEXT_URL_RE, url)
1104         if mobj:
1105             url = 'https://www.youtube.com/' + compat_urllib_parse.unquote(mobj.group(1)).lstrip('/')
1106         video_id = self._extract_id(url)
1107
1108         # Get video webpage
1109         url = 'https://www.youtube.com/watch?v=%s&gl=US&hl=en&has_verified=1' % video_id
1110         video_webpage = self._download_webpage(url, video_id)
1111
1112         # Attempt to extract SWF player URL
1113         mobj = re.search(r'swfConfig.*?"(https?:\\/\\/.*?watch.*?-.*?\.swf)"', video_webpage)
1114         if mobj is not None:
1115             player_url = re.sub(r'\\(.)', r'\1', mobj.group(1))
1116         else:
1117             player_url = None
1118
1119         # Get video info
1120         self.report_video_info_webpage_download(video_id)
1121         if re.search(r'player-age-gate-content">', video_webpage) is not None:
1122             self.report_age_confirmation()
1123             age_gate = True
1124             # We simulate the access to the video from www.youtube.com/v/{video_id}
1125             # this can be viewed without login into Youtube
1126             data = compat_urllib_parse.urlencode({'video_id': video_id,
1127                                                   'el': 'player_embedded',
1128                                                   'gl': 'US',
1129                                                   'hl': 'en',
1130                                                   'eurl': 'https://youtube.googleapis.com/v/' + video_id,
1131                                                   'asv': 3,
1132                                                   'sts':'1588',
1133                                                   })
1134             video_info_url = 'https://www.youtube.com/get_video_info?' + data
1135             video_info_webpage = self._download_webpage(video_info_url, video_id,
1136                                     note=False,
1137                                     errnote='unable to download video info webpage')
1138             video_info = compat_parse_qs(video_info_webpage)
1139         else:
1140             age_gate = False
1141             for el_type in ['&el=embedded', '&el=detailpage', '&el=vevo', '']:
1142                 video_info_url = ('https://www.youtube.com/get_video_info?&video_id=%s%s&ps=default&eurl=&gl=US&hl=en'
1143                         % (video_id, el_type))
1144                 video_info_webpage = self._download_webpage(video_info_url, video_id,
1145                                         note=False,
1146                                         errnote='unable to download video info webpage')
1147                 video_info = compat_parse_qs(video_info_webpage)
1148                 if 'token' in video_info:
1149                     break
1150         if 'token' not in video_info:
1151             if 'reason' in video_info:
1152                 raise ExtractorError(u'YouTube said: %s' % video_info['reason'][0], expected=True)
1153             else:
1154                 raise ExtractorError(u'"token" parameter not in video info for unknown reason')
1155
1156         if 'view_count' in video_info:
1157             view_count = int(video_info['view_count'][0])
1158         else:
1159             view_count = None
1160
1161         # Check for "rental" videos
1162         if 'ypc_video_rental_bar_text' in video_info and 'author' not in video_info:
1163             raise ExtractorError(u'"rental" videos not supported')
1164
1165         # Start extracting information
1166         self.report_information_extraction(video_id)
1167
1168         # uploader
1169         if 'author' not in video_info:
1170             raise ExtractorError(u'Unable to extract uploader name')
1171         video_uploader = compat_urllib_parse.unquote_plus(video_info['author'][0])
1172
1173         # uploader_id
1174         video_uploader_id = None
1175         mobj = re.search(r'<link itemprop="url" href="http://www.youtube.com/(?:user|channel)/([^"]+)">', video_webpage)
1176         if mobj is not None:
1177             video_uploader_id = mobj.group(1)
1178         else:
1179             self._downloader.report_warning(u'unable to extract uploader nickname')
1180
1181         # title
1182         if 'title' in video_info:
1183             video_title = compat_urllib_parse.unquote_plus(video_info['title'][0])
1184         else:
1185             self._downloader.report_warning(u'Unable to extract video title')
1186             video_title = u'_'
1187
1188         # thumbnail image
1189         # We try first to get a high quality image:
1190         m_thumb = re.search(r'<span itemprop="thumbnail".*?href="(.*?)">',
1191                             video_webpage, re.DOTALL)
1192         if m_thumb is not None:
1193             video_thumbnail = m_thumb.group(1)
1194         elif 'thumbnail_url' not in video_info:
1195             self._downloader.report_warning(u'unable to extract video thumbnail')
1196             video_thumbnail = None
1197         else:   # don't panic if we can't find it
1198             video_thumbnail = compat_urllib_parse.unquote_plus(video_info['thumbnail_url'][0])
1199
1200         # upload date
1201         upload_date = None
1202         mobj = re.search(r'id="eow-date.*?>(.*?)</span>', video_webpage, re.DOTALL)
1203         if mobj is not None:
1204             upload_date = ' '.join(re.sub(r'[/,-]', r' ', mobj.group(1)).split())
1205             upload_date = unified_strdate(upload_date)
1206
1207         # description
1208         video_description = get_element_by_id("eow-description", video_webpage)
1209         if video_description:
1210             video_description = re.sub(r'''(?x)
1211                 <a\s+
1212                     (?:[a-zA-Z-]+="[^"]+"\s+)*?
1213                     title="([^"]+)"\s+
1214                     (?:[a-zA-Z-]+="[^"]+"\s+)*?
1215                     class="yt-uix-redirect-link"\s*>
1216                 [^<]+
1217                 </a>
1218             ''', r'\1', video_description)
1219             video_description = clean_html(video_description)
1220         else:
1221             fd_mobj = re.search(r'<meta name="description" content="([^"]+)"', video_webpage)
1222             if fd_mobj:
1223                 video_description = unescapeHTML(fd_mobj.group(1))
1224             else:
1225                 video_description = u''
1226
1227         def _extract_count(klass):
1228             count = self._search_regex(
1229                 r'class="%s">([\d,]+)</span>' % re.escape(klass),
1230                 video_webpage, klass, default=None)
1231             if count is not None:
1232                 return int(count.replace(',', ''))
1233             return None
1234         like_count = _extract_count(u'likes-count')
1235         dislike_count = _extract_count(u'dislikes-count')
1236
1237         # subtitles
1238         video_subtitles = self.extract_subtitles(video_id, video_webpage)
1239
1240         if self._downloader.params.get('listsubtitles', False):
1241             self._list_available_subtitles(video_id, video_webpage)
1242             return
1243
1244         if 'length_seconds' not in video_info:
1245             self._downloader.report_warning(u'unable to extract video duration')
1246             video_duration = None
1247         else:
1248             video_duration = int(compat_urllib_parse.unquote_plus(video_info['length_seconds'][0]))
1249
1250         # annotations
1251         video_annotations = None
1252         if self._downloader.params.get('writeannotations', False):
1253                 video_annotations = self._extract_annotations(video_id)
1254
1255         # Decide which formats to download
1256
1257         try:
1258             mobj = re.search(r';ytplayer.config = ({.*?});', video_webpage)
1259             if not mobj:
1260                 raise ValueError('Could not find vevo ID')
1261             info = json.loads(mobj.group(1))
1262             args = info['args']
1263             # Easy way to know if the 's' value is in url_encoded_fmt_stream_map
1264             # this signatures are encrypted
1265             if 'url_encoded_fmt_stream_map' not in args:
1266                 raise ValueError(u'No stream_map present')  # caught below
1267             re_signature = re.compile(r'[&,]s=')
1268             m_s = re_signature.search(args['url_encoded_fmt_stream_map'])
1269             if m_s is not None:
1270                 self.to_screen(u'%s: Encrypted signatures detected.' % video_id)
1271                 video_info['url_encoded_fmt_stream_map'] = [args['url_encoded_fmt_stream_map']]
1272             m_s = re_signature.search(args.get('adaptive_fmts', u''))
1273             if m_s is not None:
1274                 if 'adaptive_fmts' in video_info:
1275                     video_info['adaptive_fmts'][0] += ',' + args['adaptive_fmts']
1276                 else:
1277                     video_info['adaptive_fmts'] = [args['adaptive_fmts']]
1278         except ValueError:
1279             pass
1280
1281         if 'conn' in video_info and video_info['conn'][0].startswith('rtmp'):
1282             self.report_rtmp_download()
1283             video_url_list = [('_rtmp', video_info['conn'][0])]
1284         elif len(video_info.get('url_encoded_fmt_stream_map', [])) >= 1 or len(video_info.get('adaptive_fmts', [])) >= 1:
1285             encoded_url_map = video_info.get('url_encoded_fmt_stream_map', [''])[0] + ',' + video_info.get('adaptive_fmts',[''])[0]
1286             if 'rtmpe%3Dyes' in encoded_url_map:
1287                 raise ExtractorError('rtmpe downloads are not supported, see https://github.com/rg3/youtube-dl/issues/343 for more information.', expected=True)
1288             url_map = {}
1289             for url_data_str in encoded_url_map.split(','):
1290                 url_data = compat_parse_qs(url_data_str)
1291                 if 'itag' in url_data and 'url' in url_data:
1292                     url = url_data['url'][0]
1293                     if 'sig' in url_data:
1294                         url += '&signature=' + url_data['sig'][0]
1295                     elif 's' in url_data:
1296                         encrypted_sig = url_data['s'][0]
1297                         if self._downloader.params.get('verbose'):
1298                             if age_gate:
1299                                 if player_url is None:
1300                                     player_version = 'unknown'
1301                                 else:
1302                                     player_version = self._search_regex(
1303                                         r'-(.+)\.swf$', player_url,
1304                                         u'flash player', fatal=False)
1305                                 player_desc = 'flash player %s' % player_version
1306                             else:
1307                                 player_version = self._search_regex(
1308                                     r'html5player-(.+?)\.js', video_webpage,
1309                                     'html5 player', fatal=False)
1310                                 player_desc = u'html5 player %s' % player_version
1311
1312                             parts_sizes = u'.'.join(compat_str(len(part)) for part in encrypted_sig.split('.'))
1313                             self.to_screen(u'encrypted signature length %d (%s), itag %s, %s' %
1314                                 (len(encrypted_sig), parts_sizes, url_data['itag'][0], player_desc))
1315
1316                         if not age_gate:
1317                             jsplayer_url_json = self._search_regex(
1318                                 r'"assets":.+?"js":\s*("[^"]+")',
1319                                 video_webpage, u'JS player URL')
1320                             player_url = json.loads(jsplayer_url_json)
1321
1322                         signature = self._decrypt_signature(
1323                             encrypted_sig, video_id, player_url, age_gate)
1324                         url += '&signature=' + signature
1325                     if 'ratebypass' not in url:
1326                         url += '&ratebypass=yes'
1327                     url_map[url_data['itag'][0]] = url
1328             video_url_list = self._get_video_url_list(url_map)
1329         elif video_info.get('hlsvp'):
1330             manifest_url = video_info['hlsvp'][0]
1331             url_map = self._extract_from_m3u8(manifest_url, video_id)
1332             video_url_list = self._get_video_url_list(url_map)
1333         else:
1334             raise ExtractorError(u'no conn, hlsvp or url_encoded_fmt_stream_map information found in video info')
1335
1336         formats = []
1337         for itag, video_real_url in video_url_list:
1338             dct = {
1339                 'format_id': itag,
1340                 'url': video_real_url,
1341                 'player_url': player_url,
1342             }
1343             dct.update(self._formats[itag])
1344             formats.append(dct)
1345
1346         self._sort_formats(formats)
1347
1348         return {
1349             'id':           video_id,
1350             'uploader':     video_uploader,
1351             'uploader_id':  video_uploader_id,
1352             'upload_date':  upload_date,
1353             'title':        video_title,
1354             'thumbnail':    video_thumbnail,
1355             'description':  video_description,
1356             'subtitles':    video_subtitles,
1357             'duration':     video_duration,
1358             'age_limit':    18 if age_gate else 0,
1359             'annotations':  video_annotations,
1360             'webpage_url': 'https://www.youtube.com/watch?v=%s' % video_id,
1361             'view_count':   view_count,
1362             'like_count': like_count,
1363             'dislike_count': dislike_count,
1364             'formats':      formats,
1365         }
1366
1367 class YoutubePlaylistIE(YoutubeBaseInfoExtractor):
1368     IE_DESC = u'YouTube.com playlists'
1369     _VALID_URL = r"""(?:
1370                         (?:https?://)?
1371                         (?:\w+\.)?
1372                         youtube\.com/
1373                         (?:
1374                            (?:course|view_play_list|my_playlists|artist|playlist|watch)
1375                            \? (?:.*?&)*? (?:p|a|list)=
1376                         |  p/
1377                         )
1378                         ((?:PL|EC|UU|FL|RD)?[0-9A-Za-z-_]{10,})
1379                         .*
1380                      |
1381                         ((?:PL|EC|UU|FL|RD)[0-9A-Za-z-_]{10,})
1382                      )"""
1383     _TEMPLATE_URL = 'https://www.youtube.com/playlist?list=%s&page=%s'
1384     _MORE_PAGES_INDICATOR = r'data-link-type="next"'
1385     _VIDEO_RE = r'href="/watch\?v=(?P<id>[0-9A-Za-z_-]{11})&amp;[^"]*?index=(?P<index>\d+)'
1386     IE_NAME = u'youtube:playlist'
1387
1388     @classmethod
1389     def suitable(cls, url):
1390         """Receives a URL and returns True if suitable for this IE."""
1391         return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
1392
1393     def _real_initialize(self):
1394         self._login()
1395
1396     def _ids_to_results(self, ids):
1397         return [self.url_result(vid_id, 'Youtube', video_id=vid_id)
1398                        for vid_id in ids]
1399
1400     def _extract_mix(self, playlist_id):
1401         # The mixes are generated from a a single video
1402         # the id of the playlist is just 'RD' + video_id
1403         url = 'https://youtube.com/watch?v=%s&list=%s' % (playlist_id[-11:], playlist_id)
1404         webpage = self._download_webpage(url, playlist_id, u'Downloading Youtube mix')
1405         title_span = (get_element_by_attribute('class', 'title long-title', webpage) or
1406             get_element_by_attribute('class', 'title ', webpage))
1407         title = clean_html(title_span)
1408         video_re = r'data-index="\d+".*?href="/watch\?v=([0-9A-Za-z_-]{11})&amp;[^"]*?list=%s' % re.escape(playlist_id)
1409         ids = orderedSet(re.findall(video_re, webpage))
1410         url_results = self._ids_to_results(ids)
1411
1412         return self.playlist_result(url_results, playlist_id, title)
1413
1414     def _real_extract(self, url):
1415         # Extract playlist id
1416         mobj = re.match(self._VALID_URL, url, re.VERBOSE)
1417         if mobj is None:
1418             raise ExtractorError(u'Invalid URL: %s' % url)
1419         playlist_id = mobj.group(1) or mobj.group(2)
1420
1421         # Check if it's a video-specific URL
1422         query_dict = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
1423         if 'v' in query_dict:
1424             video_id = query_dict['v'][0]
1425             if self._downloader.params.get('noplaylist'):
1426                 self.to_screen(u'Downloading just video %s because of --no-playlist' % video_id)
1427                 return self.url_result(video_id, 'Youtube', video_id=video_id)
1428             else:
1429                 self.to_screen(u'Downloading playlist PL%s - add --no-playlist to just download video %s' % (playlist_id, video_id))
1430
1431         if playlist_id.startswith('RD'):
1432             # Mixes require a custom extraction process
1433             return self._extract_mix(playlist_id)
1434         if playlist_id.startswith('TL'):
1435             raise ExtractorError(u'For downloading YouTube.com top lists, use '
1436                 u'the "yttoplist" keyword, for example "youtube-dl \'yttoplist:music:Top Tracks\'"', expected=True)
1437
1438         # Extract the video ids from the playlist pages
1439         ids = []
1440
1441         for page_num in itertools.count(1):
1442             url = self._TEMPLATE_URL % (playlist_id, page_num)
1443             page = self._download_webpage(url, playlist_id, u'Downloading page #%s' % page_num)
1444             matches = re.finditer(self._VIDEO_RE, page)
1445             # We remove the duplicates and the link with index 0
1446             # (it's not the first video of the playlist)
1447             new_ids = orderedSet(m.group('id') for m in matches if m.group('index') != '0')
1448             ids.extend(new_ids)
1449
1450             if re.search(self._MORE_PAGES_INDICATOR, page) is None:
1451                 break
1452
1453         try:
1454             playlist_title = self._og_search_title(page)
1455         except RegexNotFoundError:
1456             self.report_warning(
1457                 u'Playlist page is missing OpenGraph title, falling back ...',
1458                 playlist_id)
1459             playlist_title = self._html_search_regex(
1460                 r'<h1 class="pl-header-title">(.*?)</h1>', page, u'title')
1461
1462         url_results = self._ids_to_results(ids)
1463         return self.playlist_result(url_results, playlist_id, playlist_title)
1464
1465
1466 class YoutubeTopListIE(YoutubePlaylistIE):
1467     IE_NAME = u'youtube:toplist'
1468     IE_DESC = (u'YouTube.com top lists, "yttoplist:{channel}:{list title}"'
1469         u' (Example: "yttoplist:music:Top Tracks")')
1470     _VALID_URL = r'yttoplist:(?P<chann>.*?):(?P<title>.*?)$'
1471
1472     def _real_extract(self, url):
1473         mobj = re.match(self._VALID_URL, url)
1474         channel = mobj.group('chann')
1475         title = mobj.group('title')
1476         query = compat_urllib_parse.urlencode({'title': title})
1477         playlist_re = 'href="([^"]+?%s[^"]+?)"' % re.escape(query)
1478         channel_page = self._download_webpage('https://www.youtube.com/%s' % channel, title)
1479         link = self._html_search_regex(playlist_re, channel_page, u'list')
1480         url = compat_urlparse.urljoin('https://www.youtube.com/', link)
1481
1482         video_re = r'data-index="\d+".*?data-video-id="([0-9A-Za-z_-]{11})"'
1483         ids = []
1484         # sometimes the webpage doesn't contain the videos
1485         # retry until we get them
1486         for i in itertools.count(0):
1487             msg = u'Downloading Youtube mix'
1488             if i > 0:
1489                 msg += ', retry #%d' % i
1490             webpage = self._download_webpage(url, title, msg)
1491             ids = orderedSet(re.findall(video_re, webpage))
1492             if ids:
1493                 break
1494         url_results = self._ids_to_results(ids)
1495         return self.playlist_result(url_results, playlist_title=title)
1496
1497
1498 class YoutubeChannelIE(InfoExtractor):
1499     IE_DESC = u'YouTube.com channels'
1500     _VALID_URL = r"^(?:https?://)?(?:youtu\.be|(?:\w+\.)?youtube(?:-nocookie)?\.com)/channel/([0-9A-Za-z_-]+)"
1501     _MORE_PAGES_INDICATOR = 'yt-uix-load-more'
1502     _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'
1503     IE_NAME = u'youtube:channel'
1504
1505     def extract_videos_from_page(self, page):
1506         ids_in_page = []
1507         for mobj in re.finditer(r'href="/watch\?v=([0-9A-Za-z_-]+)&?', page):
1508             if mobj.group(1) not in ids_in_page:
1509                 ids_in_page.append(mobj.group(1))
1510         return ids_in_page
1511
1512     def _real_extract(self, url):
1513         # Extract channel id
1514         mobj = re.match(self._VALID_URL, url)
1515         if mobj is None:
1516             raise ExtractorError(u'Invalid URL: %s' % url)
1517
1518         # Download channel page
1519         channel_id = mobj.group(1)
1520         video_ids = []
1521         url = 'https://www.youtube.com/channel/%s/videos' % channel_id
1522         channel_page = self._download_webpage(url, channel_id)
1523         autogenerated = re.search(r'''(?x)
1524                 class="[^"]*?(?:
1525                     channel-header-autogenerated-label|
1526                     yt-channel-title-autogenerated
1527                 )[^"]*"''', channel_page) is not None
1528
1529         if autogenerated:
1530             # The videos are contained in a single page
1531             # the ajax pages can't be used, they are empty
1532             video_ids = self.extract_videos_from_page(channel_page)
1533         else:
1534             # Download all channel pages using the json-based channel_ajax query
1535             for pagenum in itertools.count(1):
1536                 url = self._MORE_PAGES_URL % (pagenum, channel_id)
1537                 page = self._download_webpage(url, channel_id,
1538                                               u'Downloading page #%s' % pagenum)
1539
1540                 page = json.loads(page)
1541
1542                 ids_in_page = self.extract_videos_from_page(page['content_html'])
1543                 video_ids.extend(ids_in_page)
1544
1545                 if self._MORE_PAGES_INDICATOR not in page['load_more_widget_html']:
1546                     break
1547
1548         self._downloader.to_screen(u'[youtube] Channel %s: Found %i videos' % (channel_id, len(video_ids)))
1549
1550         url_entries = [self.url_result(video_id, 'Youtube', video_id=video_id)
1551                        for video_id in video_ids]
1552         return self.playlist_result(url_entries, channel_id)
1553
1554
1555 class YoutubeUserIE(InfoExtractor):
1556     IE_DESC = u'YouTube.com user videos (URL or "ytuser" keyword)'
1557     _VALID_URL = r'(?:(?:(?:https?://)?(?:\w+\.)?youtube\.com/(?:user/)?(?!(?:attribution_link|watch)(?:$|[^a-z_A-Z0-9-])))|ytuser:)(?!feed/)([A-Za-z0-9_-]+)'
1558     _TEMPLATE_URL = 'http://gdata.youtube.com/feeds/api/users/%s'
1559     _GDATA_PAGE_SIZE = 50
1560     _GDATA_URL = 'http://gdata.youtube.com/feeds/api/users/%s/uploads?max-results=%d&start-index=%d&alt=json'
1561     IE_NAME = u'youtube:user'
1562
1563     @classmethod
1564     def suitable(cls, url):
1565         # Don't return True if the url can be extracted with other youtube
1566         # extractor, the regex would is too permissive and it would match.
1567         other_ies = iter(klass for (name, klass) in globals().items() if name.endswith('IE') and klass is not cls)
1568         if any(ie.suitable(url) for ie in other_ies): return False
1569         else: return super(YoutubeUserIE, cls).suitable(url)
1570
1571     def _real_extract(self, url):
1572         # Extract username
1573         mobj = re.match(self._VALID_URL, url)
1574         if mobj is None:
1575             raise ExtractorError(u'Invalid URL: %s' % url)
1576
1577         username = mobj.group(1)
1578
1579         # Download video ids using YouTube Data API. Result size per
1580         # query is limited (currently to 50 videos) so we need to query
1581         # page by page until there are no video ids - it means we got
1582         # all of them.
1583
1584         def download_page(pagenum):
1585             start_index = pagenum * self._GDATA_PAGE_SIZE + 1
1586
1587             gdata_url = self._GDATA_URL % (username, self._GDATA_PAGE_SIZE, start_index)
1588             page = self._download_webpage(
1589                 gdata_url, username,
1590                 u'Downloading video ids from %d to %d' % (
1591                     start_index, start_index + self._GDATA_PAGE_SIZE))
1592
1593             try:
1594                 response = json.loads(page)
1595             except ValueError as err:
1596                 raise ExtractorError(u'Invalid JSON in API response: ' + compat_str(err))
1597             if 'entry' not in response['feed']:
1598                 return
1599
1600             # Extract video identifiers
1601             entries = response['feed']['entry']
1602             for entry in entries:
1603                 title = entry['title']['$t']
1604                 video_id = entry['id']['$t'].split('/')[-1]
1605                 yield {
1606                     '_type': 'url',
1607                     'url': video_id,
1608                     'ie_key': 'Youtube',
1609                     'id': 'video_id',
1610                     'title': title,
1611                 }
1612         url_results = PagedList(download_page, self._GDATA_PAGE_SIZE)
1613
1614         return self.playlist_result(url_results, playlist_title=username)
1615
1616
1617 class YoutubeSearchIE(SearchInfoExtractor):
1618     IE_DESC = u'YouTube.com searches'
1619     _API_URL = 'https://gdata.youtube.com/feeds/api/videos?q=%s&start-index=%i&max-results=50&v=2&alt=jsonc'
1620     _MAX_RESULTS = 1000
1621     IE_NAME = u'youtube:search'
1622     _SEARCH_KEY = 'ytsearch'
1623
1624     def _get_n_results(self, query, n):
1625         """Get a specified number of results for a query"""
1626
1627         video_ids = []
1628         pagenum = 0
1629         limit = n
1630
1631         while (50 * pagenum) < limit:
1632             result_url = self._API_URL % (compat_urllib_parse.quote_plus(query), (50*pagenum)+1)
1633             data_json = self._download_webpage(
1634                 result_url, video_id=u'query "%s"' % query,
1635                 note=u'Downloading page %s' % (pagenum + 1),
1636                 errnote=u'Unable to download API page')
1637             data = json.loads(data_json)
1638             api_response = data['data']
1639
1640             if 'items' not in api_response:
1641                 raise ExtractorError(u'[youtube] No video results')
1642
1643             new_ids = list(video['id'] for video in api_response['items'])
1644             video_ids += new_ids
1645
1646             limit = min(n, api_response['totalItems'])
1647             pagenum += 1
1648
1649         if len(video_ids) > n:
1650             video_ids = video_ids[:n]
1651         videos = [self.url_result(video_id, 'Youtube', video_id=video_id)
1652                   for video_id in video_ids]
1653         return self.playlist_result(videos, query)
1654
1655 class YoutubeSearchDateIE(YoutubeSearchIE):
1656     IE_NAME = YoutubeSearchIE.IE_NAME + ':date'
1657     _API_URL = 'https://gdata.youtube.com/feeds/api/videos?q=%s&start-index=%i&max-results=50&v=2&alt=jsonc&orderby=published'
1658     _SEARCH_KEY = 'ytsearchdate'
1659     IE_DESC = u'YouTube.com searches, newest videos first'
1660
1661 class YoutubeShowIE(InfoExtractor):
1662     IE_DESC = u'YouTube.com (multi-season) shows'
1663     _VALID_URL = r'https?://www\.youtube\.com/show/(.*)'
1664     IE_NAME = u'youtube:show'
1665
1666     def _real_extract(self, url):
1667         mobj = re.match(self._VALID_URL, url)
1668         show_name = mobj.group(1)
1669         webpage = self._download_webpage(url, show_name, u'Downloading show webpage')
1670         # There's one playlist for each season of the show
1671         m_seasons = list(re.finditer(r'href="(/playlist\?list=.*?)"', webpage))
1672         self.to_screen(u'%s: Found %s seasons' % (show_name, len(m_seasons)))
1673         return [self.url_result('https://www.youtube.com' + season.group(1), 'YoutubePlaylist') for season in m_seasons]
1674
1675
1676 class YoutubeFeedsInfoExtractor(YoutubeBaseInfoExtractor):
1677     """
1678     Base class for extractors that fetch info from
1679     http://www.youtube.com/feed_ajax
1680     Subclasses must define the _FEED_NAME and _PLAYLIST_TITLE properties.
1681     """
1682     _LOGIN_REQUIRED = True
1683     # use action_load_personal_feed instead of action_load_system_feed
1684     _PERSONAL_FEED = False
1685
1686     @property
1687     def _FEED_TEMPLATE(self):
1688         action = 'action_load_system_feed'
1689         if self._PERSONAL_FEED:
1690             action = 'action_load_personal_feed'
1691         return 'http://www.youtube.com/feed_ajax?%s=1&feed_name=%s&paging=%%s' % (action, self._FEED_NAME)
1692
1693     @property
1694     def IE_NAME(self):
1695         return u'youtube:%s' % self._FEED_NAME
1696
1697     def _real_initialize(self):
1698         self._login()
1699
1700     def _real_extract(self, url):
1701         feed_entries = []
1702         paging = 0
1703         for i in itertools.count(1):
1704             info = self._download_webpage(self._FEED_TEMPLATE % paging,
1705                                           u'%s feed' % self._FEED_NAME,
1706                                           u'Downloading page %s' % i)
1707             info = json.loads(info)
1708             feed_html = info['feed_html']
1709             m_ids = re.finditer(r'"/watch\?v=(.*?)["&]', feed_html)
1710             ids = orderedSet(m.group(1) for m in m_ids)
1711             feed_entries.extend(
1712                 self.url_result(video_id, 'Youtube', video_id=video_id)
1713                 for video_id in ids)
1714             if info['paging'] is None:
1715                 break
1716             paging = info['paging']
1717         return self.playlist_result(feed_entries, playlist_title=self._PLAYLIST_TITLE)
1718
1719 class YoutubeSubscriptionsIE(YoutubeFeedsInfoExtractor):
1720     IE_DESC = u'YouTube.com subscriptions feed, "ytsubs" keyword(requires authentication)'
1721     _VALID_URL = r'https?://www\.youtube\.com/feed/subscriptions|:ytsubs(?:criptions)?'
1722     _FEED_NAME = 'subscriptions'
1723     _PLAYLIST_TITLE = u'Youtube Subscriptions'
1724
1725 class YoutubeRecommendedIE(YoutubeFeedsInfoExtractor):
1726     IE_DESC = u'YouTube.com recommended videos, "ytrec" keyword (requires authentication)'
1727     _VALID_URL = r'https?://www\.youtube\.com/feed/recommended|:ytrec(?:ommended)?'
1728     _FEED_NAME = 'recommended'
1729     _PLAYLIST_TITLE = u'Youtube Recommended videos'
1730
1731 class YoutubeWatchLaterIE(YoutubeFeedsInfoExtractor):
1732     IE_DESC = u'Youtube watch later list, "ytwatchlater" keyword (requires authentication)'
1733     _VALID_URL = r'https?://www\.youtube\.com/feed/watch_later|:ytwatchlater'
1734     _FEED_NAME = 'watch_later'
1735     _PLAYLIST_TITLE = u'Youtube Watch Later'
1736     _PERSONAL_FEED = True
1737
1738 class YoutubeHistoryIE(YoutubeFeedsInfoExtractor):
1739     IE_DESC = u'Youtube watch history, "ythistory" keyword (requires authentication)'
1740     _VALID_URL = u'https?://www\.youtube\.com/feed/history|:ythistory'
1741     _FEED_NAME = 'history'
1742     _PERSONAL_FEED = True
1743     _PLAYLIST_TITLE = u'Youtube Watch History'
1744
1745 class YoutubeFavouritesIE(YoutubeBaseInfoExtractor):
1746     IE_NAME = u'youtube:favorites'
1747     IE_DESC = u'YouTube.com favourite videos, "ytfav" keyword (requires authentication)'
1748     _VALID_URL = r'https?://www\.youtube\.com/my_favorites|:ytfav(?:ou?rites)?'
1749     _LOGIN_REQUIRED = True
1750
1751     def _real_extract(self, url):
1752         webpage = self._download_webpage('https://www.youtube.com/my_favorites', 'Youtube Favourites videos')
1753         playlist_id = self._search_regex(r'list=(.+?)["&]', webpage, u'favourites playlist id')
1754         return self.url_result(playlist_id, 'YoutubePlaylist')
1755
1756
1757 class YoutubeTruncatedURLIE(InfoExtractor):
1758     IE_NAME = 'youtube:truncated_url'
1759     IE_DESC = False  # Do not list
1760     _VALID_URL = r'(?:https?://)?[^/]+/watch\?feature=[a-z_]+$'
1761
1762     def _real_extract(self, url):
1763         raise ExtractorError(
1764             u'Did you forget to quote the URL? Remember that & is a meta '
1765             u'character in most shells, so you want to put the URL in quotes, '
1766             u'like  youtube-dl '
1767             u'"http://www.youtube.com/watch?feature=foo&v=BaW_jenozKc" '
1768             u' or simply  youtube-dl BaW_jenozKc  .',
1769             expected=True)