_ Git - youtube-dl/blob - youtube_dl/extractor/youtube.py

   1 # coding: utf-8
   2
   3 import json
   4 import netrc
   5 import re
   6 import socket
   7 import itertools
   8
   9 from .common import InfoExtractor, SearchInfoExtractor
  10 from ..utils import (
  11     compat_http_client,
  12     compat_parse_qs,
  13     compat_urllib_error,
  14     compat_urllib_parse,
  15     compat_urllib_request,
  16     compat_str,
  17
  18     clean_html,
  19     get_element_by_id,
  20     ExtractorError,
  21     unescapeHTML,
  22     unified_strdate,
  23     orderedSet,
  24 )
  25
  26 class YoutubeBaseInfoExtractor(InfoExtractor):
  27     """Provide base functions for Youtube extractors"""
  28     _LOGIN_URL = 'https://accounts.google.com/ServiceLogin'
  29     _LANG_URL = r'https://www.youtube.com/?hl=en&persist_hl=1&gl=US&persist_gl=1&opt_out_ackd=1'
  30     _AGE_URL = 'http://www.youtube.com/verify_age?next_url=/&gl=US&hl=en'
  31     _NETRC_MACHINE = 'youtube'
  32     # If True it will raise an error if no login info is provided
  33     _LOGIN_REQUIRED = False
  34
  35     def report_lang(self):
  36         """Report attempt to set language."""
  37         self.to_screen(u'Setting language')
  38
  39     def _set_language(self):
  40         request = compat_urllib_request.Request(self._LANG_URL)
  41         try:
  42             self.report_lang()
  43             compat_urllib_request.urlopen(request).read()
  44         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
  45             self._downloader.report_warning(u'unable to set language: %s' % compat_str(err))
  46             return False
  47         return True
  48
  49     def _login(self):
  50         (username, password) = self._get_login_info()
  51         # No authentication to be performed
  52         if username is None:
  53             if self._LOGIN_REQUIRED:
  54                 raise ExtractorError(u'No login info available, needed for using %s.' % self.IE_NAME, expected=True)
  55             return False
  56
  57         request = compat_urllib_request.Request(self._LOGIN_URL)
  58         try:
  59             login_page = compat_urllib_request.urlopen(request).read().decode('utf-8')
  60         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
  61             self._downloader.report_warning(u'unable to fetch login page: %s' % compat_str(err))
  62             return False
  63
  64         galx = None
  65         dsh = None
  66         match = re.search(re.compile(r'<input.+?name="GALX".+?value="(.+?)"', re.DOTALL), login_page)
  67         if match:
  68           galx = match.group(1)
  69         match = re.search(re.compile(r'<input.+?name="dsh".+?value="(.+?)"', re.DOTALL), login_page)
  70         if match:
  71           dsh = match.group(1)
  72
  73         # Log in
  74         login_form_strs = {
  75                 u'continue': u'https://www.youtube.com/signin?action_handle_signin=true&feature=sign_in_button&hl=en_US&nomobiletemp=1',
  76                 u'Email': username,
  77                 u'GALX': galx,
  78                 u'Passwd': password,
  79                 u'PersistentCookie': u'yes',
  80                 u'_utf8': u'霱',
  81                 u'bgresponse': u'js_disabled',
  82                 u'checkConnection': u'',
  83                 u'checkedDomains': u'youtube',
  84                 u'dnConn': u'',
  85                 u'dsh': dsh,
  86                 u'pstMsg': u'0',
  87                 u'rmShown': u'1',
  88                 u'secTok': u'',
  89                 u'signIn': u'Sign in',
  90                 u'timeStmp': u'',
  91                 u'service': u'youtube',
  92                 u'uilel': u'3',
  93                 u'hl': u'en_US',
  94         }
  95         # Convert to UTF-8 *before* urlencode because Python 2.x's urlencode
  96         # chokes on unicode
  97         login_form = dict((k.encode('utf-8'), v.encode('utf-8')) for k,v in login_form_strs.items())
  98         login_data = compat_urllib_parse.urlencode(login_form).encode('ascii')
  99         request = compat_urllib_request.Request(self._LOGIN_URL, login_data)
 100         try:
 101             self.report_login()
 102             login_results = compat_urllib_request.urlopen(request).read().decode('utf-8')
 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         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 107             self._downloader.report_warning(u'unable to log in: %s' % compat_str(err))
 108             return False
 109         return True
 110
 111     def _confirm_age(self):
 112         age_form = {
 113                 'next_url':     '/',
 114                 'action_confirm':   'Confirm',
 115                 }
 116         request = compat_urllib_request.Request(self._AGE_URL, compat_urllib_parse.urlencode(age_form))
 117         try:
 118             self.report_age_confirmation()
 119             compat_urllib_request.urlopen(request).read().decode('utf-8')
 120         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 121             raise ExtractorError(u'Unable to confirm age: %s' % compat_str(err))
 122         return True
 123
 124     def _real_initialize(self):
 125         if self._downloader is None:
 126             return
 127         if not self._set_language():
 128             return
 129         if not self._login():
 130             return
 131         self._confirm_age()
 132
 133 class YoutubeIE(YoutubeBaseInfoExtractor):
 134     IE_DESC = u'YouTube.com'
 135     _VALID_URL = r"""^
 136                      (
 137                          (?:https?://)?                                       # http(s):// (optional)
 138                          (?:youtu\.be/|(?:\w+\.)?youtube(?:-nocookie)?\.com/|
 139                             tube\.majestyc\.net/)                             # 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                          )?                                                   # optional -> youtube.com/xxxx is OK
 150                      )?                                                       # all until now is optional -> you can pass the naked ID
 151                      ([0-9A-Za-z_-]+)                                         # here is it! the YouTube video ID
 152                      (?(1).+)?                                                # if we found the ID, everything can follow
 153                      $"""
 154     _NEXT_URL_RE = r'[\?&]next_url=([^&]+)'
 155     # Listed in order of quality
 156     _available_formats = ['38', '37', '46', '22', '45', '35', '44', '34', '18', '43', '6', '5', '17', '13',
 157                           '95', '94', '93', '92', '132', '151',
 158                           # 3D
 159                           '85', '84', '102', '83', '101', '82', '100',
 160                           # Dash video
 161                           '138', '137', '248', '136', '247', '135', '246',
 162                           '245', '244', '134', '243', '133', '242', '160',
 163                           # Dash audio
 164                           '141', '172', '140', '171', '139',
 165                           ]
 166     _available_formats_prefer_free = ['38', '46', '37', '45', '22', '44', '35', '43', '34', '18', '6', '5', '17', '13',
 167                                       '95', '94', '93', '92', '132', '151',
 168                                       '85', '102', '84', '101', '83', '100', '82',
 169                                       # Dash video
 170                                       '138', '248', '137', '247', '136', '246', '245',
 171                                       '244', '135', '243', '134', '242', '133', '160',
 172                                       # Dash audio
 173                                       '172', '141', '171', '140', '139',
 174                                       ]
 175     _video_extensions = {
 176         '13': '3gp',
 177         '17': 'mp4',
 178         '18': 'mp4',
 179         '22': 'mp4',
 180         '37': 'mp4',
 181         '38': 'mp4',
 182         '43': 'webm',
 183         '44': 'webm',
 184         '45': 'webm',
 185         '46': 'webm',
 186
 187         # 3d videos
 188         '82': 'mp4',
 189         '83': 'mp4',
 190         '84': 'mp4',
 191         '85': 'mp4',
 192         '100': 'webm',
 193         '101': 'webm',
 194         '102': 'webm',
 195
 196         # videos that use m3u8
 197         '92': 'mp4',
 198         '93': 'mp4',
 199         '94': 'mp4',
 200         '95': 'mp4',
 201         '96': 'mp4',
 202         '132': 'mp4',
 203         '151': 'mp4',
 204
 205         # Dash mp4
 206         '133': 'mp4',
 207         '134': 'mp4',
 208         '135': 'mp4',
 209         '136': 'mp4',
 210         '137': 'mp4',
 211         '138': 'mp4',
 212         '139': 'mp4',
 213         '140': 'mp4',
 214         '141': 'mp4',
 215         '160': 'mp4',
 216
 217         # Dash webm
 218         '171': 'webm',
 219         '172': 'webm',
 220         '242': 'webm',
 221         '243': 'webm',
 222         '244': 'webm',
 223         '245': 'webm',
 224         '246': 'webm',
 225         '247': 'webm',
 226         '248': 'webm',
 227     }
 228     _video_dimensions = {
 229         '5': '240x400',
 230         '6': '???',
 231         '13': '???',
 232         '17': '144x176',
 233         '18': '360x640',
 234         '22': '720x1280',
 235         '34': '360x640',
 236         '35': '480x854',
 237         '37': '1080x1920',
 238         '38': '3072x4096',
 239         '43': '360x640',
 240         '44': '480x854',
 241         '45': '720x1280',
 242         '46': '1080x1920',
 243         '82': '360p',
 244         '83': '480p',
 245         '84': '720p',
 246         '85': '1080p',
 247         '92': '240p',
 248         '93': '360p',
 249         '94': '480p',
 250         '95': '720p',
 251         '96': '1080p',
 252         '100': '360p',
 253         '101': '480p',
 254         '102': '720p',
 255         '132': '240p',
 256         '151': '72p',
 257         '133': '240p',
 258         '134': '360p',
 259         '135': '480p',
 260         '136': '720p',
 261         '137': '1080p',
 262         '138': '>1080p',
 263         '139': '48k',
 264         '140': '128k',
 265         '141': '256k',
 266         '160': '192p',
 267         '171': '128k',
 268         '172': '256k',
 269         '242': '240p',
 270         '243': '360p',
 271         '244': '480p',
 272         '245': '480p',
 273         '246': '480p',
 274         '247': '720p',
 275         '248': '1080p',
 276     }
 277     _special_itags = {
 278         '82': '3D',
 279         '83': '3D',
 280         '84': '3D',
 281         '85': '3D',
 282         '100': '3D',
 283         '101': '3D',
 284         '102': '3D',
 285         '133': 'DASH Video',
 286         '134': 'DASH Video',
 287         '135': 'DASH Video',
 288         '136': 'DASH Video',
 289         '137': 'DASH Video',
 290         '138': 'DASH Video',
 291         '139': 'DASH Audio',
 292         '140': 'DASH Audio',
 293         '141': 'DASH Audio',
 294         '160': 'DASH Video',
 295         '171': 'DASH Audio',
 296         '172': 'DASH Audio',
 297         '242': 'DASH Video',
 298         '243': 'DASH Video',
 299         '244': 'DASH Video',
 300         '245': 'DASH Video',
 301         '246': 'DASH Video',
 302         '247': 'DASH Video',
 303         '248': 'DASH Video',
 304     }
 305
 306     IE_NAME = u'youtube'
 307     _TESTS = [
 308         {
 309             u"url":  u"http://www.youtube.com/watch?v=BaW_jenozKc",
 310             u"file":  u"BaW_jenozKc.mp4",
 311             u"info_dict": {
 312                 u"title": u"youtube-dl test video \"'/\\ä↭𝕐",
 313                 u"uploader": u"Philipp Hagemeister",
 314                 u"uploader_id": u"phihag",
 315                 u"upload_date": u"20121002",
 316                 u"description": u"test chars:  \"'/\\ä↭𝕐\n\nThis is a test video for youtube-dl.\n\nFor more information, contact phihag@phihag.de ."
 317             }
 318         },
 319         {
 320             u"url":  u"http://www.youtube.com/watch?v=1ltcDfZMA3U",
 321             u"file":  u"1ltcDfZMA3U.flv",
 322             u"note": u"Test VEVO video (#897)",
 323             u"info_dict": {
 324                 u"upload_date": u"20070518",
 325                 u"title": u"Maps - It Will Find You",
 326                 u"description": u"Music video by Maps performing It Will Find You.",
 327                 u"uploader": u"MuteUSA",
 328                 u"uploader_id": u"MuteUSA"
 329             }
 330         },
 331         {
 332             u"url":  u"http://www.youtube.com/watch?v=UxxajLWwzqY",
 333             u"file":  u"UxxajLWwzqY.mp4",
 334             u"note": u"Test generic use_cipher_signature video (#897)",
 335             u"info_dict": {
 336                 u"upload_date": u"20120506",
 337                 u"title": u"Icona Pop - I Love It (feat. Charli XCX) [OFFICIAL VIDEO]",
 338                 u"description": u"md5:b085c9804f5ab69f4adea963a2dceb3c",
 339                 u"uploader": u"Icona Pop",
 340                 u"uploader_id": u"IconaPop"
 341             }
 342         },
 343         {
 344             u"url":  u"https://www.youtube.com/watch?v=07FYdnEawAQ",
 345             u"file":  u"07FYdnEawAQ.mp4",
 346             u"note": u"Test VEVO video with age protection (#956)",
 347             u"info_dict": {
 348                 u"upload_date": u"20130703",
 349                 u"title": u"Justin Timberlake - Tunnel Vision (Explicit)",
 350                 u"description": u"md5:64249768eec3bc4276236606ea996373",
 351                 u"uploader": u"justintimberlakeVEVO",
 352                 u"uploader_id": u"justintimberlakeVEVO"
 353             }
 354         },
 355         {
 356             u'url': u'https://www.youtube.com/watch?v=TGi3HqYrWHE',
 357             u'file': u'TGi3HqYrWHE.mp4',
 358             u'note': u'm3u8 video',
 359             u'info_dict': {
 360                 u'title': u'Triathlon - Men - London 2012 Olympic Games',
 361                 u'description': u'- Men -  TR02 - Triathlon - 07 August 2012 - London 2012 Olympic Games',
 362                 u'uploader': u'olympic',
 363                 u'upload_date': u'20120807',
 364                 u'uploader_id': u'olympic',
 365             },
 366             u'params': {
 367                 u'skip_download': True,
 368             },
 369         },
 370     ]
 371
 372
 373     @classmethod
 374     def suitable(cls, url):
 375         """Receives a URL and returns True if suitable for this IE."""
 376         if YoutubePlaylistIE.suitable(url) or YoutubeSubscriptionsIE.suitable(url): return False
 377         return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
 378
 379     def report_video_webpage_download(self, video_id):
 380         """Report attempt to download video webpage."""
 381         self.to_screen(u'%s: Downloading video webpage' % video_id)
 382
 383     def report_video_info_webpage_download(self, video_id):
 384         """Report attempt to download video info webpage."""
 385         self.to_screen(u'%s: Downloading video info webpage' % video_id)
 386
 387     def report_video_subtitles_download(self, video_id):
 388         """Report attempt to download video info webpage."""
 389         self.to_screen(u'%s: Checking available subtitles' % video_id)
 390
 391     def report_video_subtitles_request(self, video_id, sub_lang, format):
 392         """Report attempt to download video info webpage."""
 393         self.to_screen(u'%s: Downloading video subtitles for %s.%s' % (video_id, sub_lang, format))
 394
 395     def report_video_subtitles_available(self, video_id, sub_lang_list):
 396         """Report available subtitles."""
 397         sub_lang = ",".join(list(sub_lang_list.keys()))
 398         self.to_screen(u'%s: Available subtitles for video: %s' % (video_id, sub_lang))
 399
 400     def report_information_extraction(self, video_id):
 401         """Report attempt to extract video information."""
 402         self.to_screen(u'%s: Extracting video information' % video_id)
 403
 404     def report_unavailable_format(self, video_id, format):
 405         """Report extracted video URL."""
 406         self.to_screen(u'%s: Format %s not available' % (video_id, format))
 407
 408     def report_rtmp_download(self):
 409         """Indicate the download will use the RTMP protocol."""
 410         self.to_screen(u'RTMP download detected')
 411
 412     def _decrypt_signature(self, s):
 413         """Turn the encrypted s field into a working signature"""
 414
 415         if len(s) == 92:
 416             return s[25] + s[3:25] + s[0] + s[26:42] + s[79] + s[43:79] + s[91] + s[80:83]
 417         elif len(s) == 90:
 418             return s[25] + s[3:25] + s[2] + s[26:40] + s[77] + s[41:77] + s[89] + s[78:81]
 419         elif len(s) == 89:
 420             return s[84:78:-1] + s[87] + s[77:60:-1] + s[0] + s[59:3:-1]
 421         elif len(s) == 88:
 422             return s[48] + s[81:67:-1] + s[82] + s[66:62:-1] + s[85] + s[61:48:-1] + s[67] + s[47:12:-1] + s[3] + s[11:3:-1] + s[2] + s[12]
 423         elif len(s) == 87:
 424             return s[6:27] + s[4] + s[28:39] + s[27] + s[40:59] + s[2] + s[60:]
 425         elif len(s) == 86:
 426             return s[5:20] + s[2] + s[21:]
 427         elif len(s) == 85:
 428             return s[83:34:-1] + s[0] + s[33:27:-1] + s[3] + s[26:19:-1] + s[34] + s[18:3:-1] + s[27]
 429         elif len(s) == 84:
 430             return s[83:27:-1] + s[0] + s[26:5:-1] + s[2:0:-1] + s[27]
 431         elif len(s) == 83:
 432             return s[81:64:-1] + s[82] + s[63:52:-1] + s[45] + s[51:45:-1] + s[1] + s[44:1:-1] + s[0]
 433         elif len(s) == 82:
 434             return s[1:19] + s[0] + s[20:68] + s[19] + s[69:82]
 435         elif len(s) == 81:
 436             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]
 437         elif len(s) == 80:
 438             return s[1:19] + s[0] + s[20:68] + s[19] + s[69:80]
 439         elif len(s) == 79:
 440             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]
 441
 442         else:
 443             raise ExtractorError(u'Unable to decrypt signature, key length %d not supported; retrying might work' % (len(s)))
 444
 445     def _decrypt_signature_age_gate(self, s):
 446         # The videos with age protection use another player, so the algorithms
 447         # can be different.
 448         if len(s) == 86:
 449             return s[2:63] + s[82] + s[64:82] + s[63]
 450         else:
 451             # Fallback to the other algortihms
 452             return self._decrypt_signature(s)
 453
 454
 455     def _get_available_subtitles(self, video_id):
 456         self.report_video_subtitles_download(video_id)
 457         request = compat_urllib_request.Request('http://video.google.com/timedtext?hl=en&type=list&v=%s' % video_id)
 458         try:
 459             sub_list = compat_urllib_request.urlopen(request).read().decode('utf-8')
 460         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 461             return (u'unable to download video subtitles: %s' % compat_str(err), None)
 462         sub_lang_list = re.findall(r'name="([^"]*)"[^>]+lang_code="([\w\-]+)"', sub_list)
 463         sub_lang_list = dict((l[1], l[0]) for l in sub_lang_list)
 464         if not sub_lang_list:
 465             return (u'video doesn\'t have subtitles', None)
 466         return sub_lang_list
 467
 468     def _list_available_subtitles(self, video_id):
 469         sub_lang_list = self._get_available_subtitles(video_id)
 470         self.report_video_subtitles_available(video_id, sub_lang_list)
 471
 472     def _request_subtitle(self, sub_lang, sub_name, video_id, format):
 473         """
 474         Return tuple:
 475         (error_message, sub_lang, sub)
 476         """
 477         self.report_video_subtitles_request(video_id, sub_lang, format)
 478         params = compat_urllib_parse.urlencode({
 479             'lang': sub_lang,
 480             'name': sub_name,
 481             'v': video_id,
 482             'fmt': format,
 483         })
 484         url = 'http://www.youtube.com/api/timedtext?' + params
 485         try:
 486             sub = compat_urllib_request.urlopen(url).read().decode('utf-8')
 487         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 488             return (u'unable to download video subtitles: %s' % compat_str(err), None, None)
 489         if not sub:
 490             return (u'Did not fetch video subtitles', None, None)
 491         return (None, sub_lang, sub)
 492
 493     def _request_automatic_caption(self, video_id, webpage):
 494         """We need the webpage for getting the captions url, pass it as an
 495            argument to speed up the process."""
 496         sub_lang = self._downloader.params.get('subtitleslang') or 'en'
 497         sub_format = self._downloader.params.get('subtitlesformat')
 498         self.to_screen(u'%s: Looking for automatic captions' % video_id)
 499         mobj = re.search(r';ytplayer.config = ({.*?});', webpage)
 500         err_msg = u'Couldn\'t find automatic captions for "%s"' % sub_lang
 501         if mobj is None:
 502             return [(err_msg, None, None)]
 503         player_config = json.loads(mobj.group(1))
 504         try:
 505             args = player_config[u'args']
 506             caption_url = args[u'ttsurl']
 507             timestamp = args[u'timestamp']
 508             params = compat_urllib_parse.urlencode({
 509                 'lang': 'en',
 510                 'tlang': sub_lang,
 511                 'fmt': sub_format,
 512                 'ts': timestamp,
 513                 'kind': 'asr',
 514             })
 515             subtitles_url = caption_url + '&' + params
 516             sub = self._download_webpage(subtitles_url, video_id, u'Downloading automatic captions')
 517             return [(None, sub_lang, sub)]
 518         except KeyError:
 519             return [(err_msg, None, None)]
 520
 521     def _extract_subtitle(self, video_id):
 522         """
 523         Return a list with a tuple:
 524         [(error_message, sub_lang, sub)]
 525         """
 526         sub_lang_list = self._get_available_subtitles(video_id)
 527         sub_format = self._downloader.params.get('subtitlesformat')
 528         if  isinstance(sub_lang_list,tuple): #There was some error, it didn't get the available subtitles
 529             return [(sub_lang_list[0], None, None)]
 530         if self._downloader.params.get('subtitleslang', False):
 531             sub_lang = self._downloader.params.get('subtitleslang')
 532         elif 'en' in sub_lang_list:
 533             sub_lang = 'en'
 534         else:
 535             sub_lang = list(sub_lang_list.keys())[0]
 536         if not sub_lang in sub_lang_list:
 537             return [(u'no closed captions found in the specified language "%s"' % sub_lang, None, None)]
 538
 539         subtitle = self._request_subtitle(sub_lang, sub_lang_list[sub_lang].encode('utf-8'), video_id, sub_format)
 540         return [subtitle]
 541
 542     def _extract_all_subtitles(self, video_id):
 543         sub_lang_list = self._get_available_subtitles(video_id)
 544         sub_format = self._downloader.params.get('subtitlesformat')
 545         if  isinstance(sub_lang_list,tuple): #There was some error, it didn't get the available subtitles
 546             return [(sub_lang_list[0], None, None)]
 547         subtitles = []
 548         for sub_lang in sub_lang_list:
 549             subtitle = self._request_subtitle(sub_lang, sub_lang_list[sub_lang].encode('utf-8'), video_id, sub_format)
 550             subtitles.append(subtitle)
 551         return subtitles
 552
 553     def _print_formats(self, formats):
 554         print('Available formats:')
 555         for x in formats:
 556             print('%s\t:\t%s\t[%s]%s' %(x, self._video_extensions.get(x, 'flv'),
 557                                         self._video_dimensions.get(x, '???'),
 558                                         ' ('+self._special_itags[x]+')' if x in self._special_itags else ''))
 559
 560     def _extract_id(self, url):
 561         mobj = re.match(self._VALID_URL, url, re.VERBOSE)
 562         if mobj is None:
 563             raise ExtractorError(u'Invalid URL: %s' % url)
 564         video_id = mobj.group(2)
 565         return video_id
 566
 567     def _get_video_url_list(self, url_map):
 568         """
 569         Transform a dictionary in the format {itag:url} to a list of (itag, url)
 570         with the requested formats.
 571         """
 572         req_format = self._downloader.params.get('format', None)
 573         format_limit = self._downloader.params.get('format_limit', None)
 574         available_formats = self._available_formats_prefer_free if self._downloader.params.get('prefer_free_formats', False) else self._available_formats
 575         if format_limit is not None and format_limit in available_formats:
 576             format_list = available_formats[available_formats.index(format_limit):]
 577         else:
 578             format_list = available_formats
 579         existing_formats = [x for x in format_list if x in url_map]
 580         if len(existing_formats) == 0:
 581             raise ExtractorError(u'no known formats available for video')
 582         if self._downloader.params.get('listformats', None):
 583             self._print_formats(existing_formats)
 584             return
 585         if req_format is None or req_format == 'best':
 586             video_url_list = [(existing_formats[0], url_map[existing_formats[0]])] # Best quality
 587         elif req_format == 'worst':
 588             video_url_list = [(existing_formats[-1], url_map[existing_formats[-1]])] # worst quality
 589         elif req_format in ('-1', 'all'):
 590             video_url_list = [(f, url_map[f]) for f in existing_formats] # All formats
 591         else:
 592             # Specific formats. We pick the first in a slash-delimeted sequence.
 593             # For example, if '1/2/3/4' is requested and '2' and '4' are available, we pick '2'.
 594             req_formats = req_format.split('/')
 595             video_url_list = None
 596             for rf in req_formats:
 597                 if rf in url_map:
 598                     video_url_list = [(rf, url_map[rf])]
 599                     break
 600             if video_url_list is None:
 601                 raise ExtractorError(u'requested format not available')
 602         return video_url_list
 603
 604     def _extract_from_m3u8(self, manifest_url, video_id):
 605         url_map = {}
 606         def _get_urls(_manifest):
 607             lines = _manifest.split('\n')
 608             urls = filter(lambda l: l and not l.startswith('#'),
 609                             lines)
 610             return urls
 611         manifest = self._download_webpage(manifest_url, video_id, u'Downloading formats manifest')
 612         formats_urls = _get_urls(manifest)
 613         for format_url in formats_urls:
 614             itag = self._search_regex(r'itag/(\d+?)/', format_url, 'itag')
 615             url_map[itag] = format_url
 616         return url_map
 617
 618     def _real_extract(self, url):
 619         if re.match(r'(?:https?://)?[^/]+/watch\?feature=[a-z_]+$', url):
 620             self._downloader.report_warning(u'Did you forget to quote the URL? Remember that & is a meta-character in most shells, so you want to put the URL in quotes, like  youtube-dl \'http://www.youtube.com/watch?feature=foo&v=BaW_jenozKc\' (or simply  youtube-dl BaW_jenozKc  ).')
 621
 622         # Extract original video URL from URL with redirection, like age verification, using next_url parameter
 623         mobj = re.search(self._NEXT_URL_RE, url)
 624         if mobj:
 625             url = 'https://www.youtube.com/' + compat_urllib_parse.unquote(mobj.group(1)).lstrip('/')
 626         video_id = self._extract_id(url)
 627
 628         # Get video webpage
 629         self.report_video_webpage_download(video_id)
 630         url = 'https://www.youtube.com/watch?v=%s&gl=US&hl=en&has_verified=1' % video_id
 631         request = compat_urllib_request.Request(url)
 632         try:
 633             video_webpage_bytes = compat_urllib_request.urlopen(request).read()
 634         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 635             raise ExtractorError(u'Unable to download video webpage: %s' % compat_str(err))
 636
 637         video_webpage = video_webpage_bytes.decode('utf-8', 'ignore')
 638
 639         # Attempt to extract SWF player URL
 640         mobj = re.search(r'swfConfig.*?"(http:\\/\\/.*?watch.*?-.*?\.swf)"', video_webpage)
 641         if mobj is not None:
 642             player_url = re.sub(r'\\(.)', r'\1', mobj.group(1))
 643         else:
 644             player_url = None
 645
 646         # Get video info
 647         self.report_video_info_webpage_download(video_id)
 648         if re.search(r'player-age-gate-content">', video_webpage) is not None:
 649             self.report_age_confirmation()
 650             age_gate = True
 651             # We simulate the access to the video from www.youtube.com/v/{video_id}
 652             # this can be viewed without login into Youtube
 653             data = compat_urllib_parse.urlencode({'video_id': video_id,
 654                                                   'el': 'embedded',
 655                                                   'gl': 'US',
 656                                                   'hl': 'en',
 657                                                   'eurl': 'https://youtube.googleapis.com/v/' + video_id,
 658                                                   'asv': 3,
 659                                                   'sts':'1588',
 660                                                   })
 661             video_info_url = 'https://www.youtube.com/get_video_info?' + data
 662             video_info_webpage = self._download_webpage(video_info_url, video_id,
 663                                     note=False,
 664                                     errnote='unable to download video info webpage')
 665             video_info = compat_parse_qs(video_info_webpage)
 666         else:
 667             age_gate = False
 668             for el_type in ['&el=embedded', '&el=detailpage', '&el=vevo', '']:
 669                 video_info_url = ('https://www.youtube.com/get_video_info?&video_id=%s%s&ps=default&eurl=&gl=US&hl=en'
 670                         % (video_id, el_type))
 671                 video_info_webpage = self._download_webpage(video_info_url, video_id,
 672                                         note=False,
 673                                         errnote='unable to download video info webpage')
 674                 video_info = compat_parse_qs(video_info_webpage)
 675                 if 'token' in video_info:
 676                     break
 677         if 'token' not in video_info:
 678             if 'reason' in video_info:
 679                 raise ExtractorError(u'YouTube said: %s' % video_info['reason'][0], expected=True)
 680             else:
 681                 raise ExtractorError(u'"token" parameter not in video info for unknown reason')
 682
 683         # Check for "rental" videos
 684         if 'ypc_video_rental_bar_text' in video_info and 'author' not in video_info:
 685             raise ExtractorError(u'"rental" videos not supported')
 686
 687         # Start extracting information
 688         self.report_information_extraction(video_id)
 689
 690         # uploader
 691         if 'author' not in video_info:
 692             raise ExtractorError(u'Unable to extract uploader name')
 693         video_uploader = compat_urllib_parse.unquote_plus(video_info['author'][0])
 694
 695         # uploader_id
 696         video_uploader_id = None
 697         mobj = re.search(r'<link itemprop="url" href="http://www.youtube.com/(?:user|channel)/([^"]+)">', video_webpage)
 698         if mobj is not None:
 699             video_uploader_id = mobj.group(1)
 700         else:
 701             self._downloader.report_warning(u'unable to extract uploader nickname')
 702
 703         # title
 704         if 'title' not in video_info:
 705             raise ExtractorError(u'Unable to extract video title')
 706         video_title = compat_urllib_parse.unquote_plus(video_info['title'][0])
 707
 708         # thumbnail image
 709         # We try first to get a high quality image:
 710         m_thumb = re.search(r'<span itemprop="thumbnail".*?href="(.*?)">',
 711                             video_webpage, re.DOTALL)
 712         if m_thumb is not None:
 713             video_thumbnail = m_thumb.group(1)
 714         elif 'thumbnail_url' not in video_info:
 715             self._downloader.report_warning(u'unable to extract video thumbnail')
 716             video_thumbnail = ''
 717         else:   # don't panic if we can't find it
 718             video_thumbnail = compat_urllib_parse.unquote_plus(video_info['thumbnail_url'][0])
 719
 720         # upload date
 721         upload_date = None
 722         mobj = re.search(r'id="eow-date.*?>(.*?)</span>', video_webpage, re.DOTALL)
 723         if mobj is not None:
 724             upload_date = ' '.join(re.sub(r'[/,-]', r' ', mobj.group(1)).split())
 725             upload_date = unified_strdate(upload_date)
 726
 727         # description
 728         video_description = get_element_by_id("eow-description", video_webpage)
 729         if video_description:
 730             video_description = clean_html(video_description)
 731         else:
 732             fd_mobj = re.search(r'<meta name="description" content="([^"]+)"', video_webpage)
 733             if fd_mobj:
 734                 video_description = unescapeHTML(fd_mobj.group(1))
 735             else:
 736                 video_description = u''
 737
 738         # subtitles
 739         video_subtitles = None
 740
 741         if self._downloader.params.get('writesubtitles', False):
 742             video_subtitles = self._extract_subtitle(video_id)
 743             if video_subtitles:
 744                 (sub_error, sub_lang, sub) = video_subtitles[0]
 745                 if sub_error:
 746                     self._downloader.report_warning(sub_error)
 747
 748         if self._downloader.params.get('writeautomaticsub', False):
 749             video_subtitles = self._request_automatic_caption(video_id, video_webpage)
 750             (sub_error, sub_lang, sub) = video_subtitles[0]
 751             if sub_error:
 752                 self._downloader.report_warning(sub_error)
 753
 754         if self._downloader.params.get('allsubtitles', False):
 755             video_subtitles = self._extract_all_subtitles(video_id)
 756             for video_subtitle in video_subtitles:
 757                 (sub_error, sub_lang, sub) = video_subtitle
 758                 if sub_error:
 759                     self._downloader.report_warning(sub_error)
 760
 761         if self._downloader.params.get('listsubtitles', False):
 762             self._list_available_subtitles(video_id)
 763             return
 764
 765         if 'length_seconds' not in video_info:
 766             self._downloader.report_warning(u'unable to extract video duration')
 767             video_duration = ''
 768         else:
 769             video_duration = compat_urllib_parse.unquote_plus(video_info['length_seconds'][0])
 770
 771         # Decide which formats to download
 772
 773         try:
 774             mobj = re.search(r';ytplayer.config = ({.*?});', video_webpage)
 775             if not mobj:
 776                 raise ValueError('Could not find vevo ID')
 777             info = json.loads(mobj.group(1))
 778             args = info['args']
 779             # Easy way to know if the 's' value is in url_encoded_fmt_stream_map
 780             # this signatures are encrypted
 781             m_s = re.search(r'[&,]s=', args['url_encoded_fmt_stream_map'])
 782             if m_s is not None:
 783                 self.to_screen(u'%s: Encrypted signatures detected.' % video_id)
 784                 video_info['url_encoded_fmt_stream_map'] = [args['url_encoded_fmt_stream_map']]
 785             m_s = re.search(r'[&,]s=', args.get('adaptive_fmts', u''))
 786             if m_s is not None:
 787                 if 'url_encoded_fmt_stream_map' in video_info:
 788                     video_info['url_encoded_fmt_stream_map'][0] += ',' + args['adaptive_fmts']
 789                 else:
 790                     video_info['url_encoded_fmt_stream_map'] = [args['adaptive_fmts']]
 791             elif 'adaptive_fmts' in video_info:
 792                 if 'url_encoded_fmt_stream_map' in video_info:
 793                     video_info['url_encoded_fmt_stream_map'][0] += ',' + video_info['adaptive_fmts'][0]
 794                 else:
 795                     video_info['url_encoded_fmt_stream_map'] = video_info['adaptive_fmts']
 796         except ValueError:
 797             pass
 798
 799         if 'conn' in video_info and video_info['conn'][0].startswith('rtmp'):
 800             self.report_rtmp_download()
 801             video_url_list = [(None, video_info['conn'][0])]
 802         elif 'url_encoded_fmt_stream_map' in video_info and len(video_info['url_encoded_fmt_stream_map']) >= 1:
 803             if 'rtmpe%3Dyes' in video_info['url_encoded_fmt_stream_map'][0]:
 804                 raise ExtractorError('rtmpe downloads are not supported, see https://github.com/rg3/youtube-dl/issues/343 for more information.', expected=True)
 805             url_map = {}
 806             for url_data_str in video_info['url_encoded_fmt_stream_map'][0].split(','):
 807                 url_data = compat_parse_qs(url_data_str)
 808                 if 'itag' in url_data and 'url' in url_data:
 809                     url = url_data['url'][0]
 810                     if 'sig' in url_data:
 811                         url += '&signature=' + url_data['sig'][0]
 812                     elif 's' in url_data:
 813                         if self._downloader.params.get('verbose'):
 814                             s = url_data['s'][0]
 815                             if age_gate:
 816                                 player_version = self._search_regex(r'ad3-(.+?)\.swf',
 817                                     video_info['ad3_module'][0] if 'ad3_module' in video_info else 'NOT FOUND',
 818                                     'flash player', fatal=False)
 819                                 player = 'flash player %s' % player_version
 820                             else:
 821                                 player = u'html5 player %s' % self._search_regex(r'html5player-(.+?)\.js', video_webpage,
 822                                     'html5 player', fatal=False)
 823                             parts_sizes = u'.'.join(compat_str(len(part)) for part in s.split('.'))
 824                             self.to_screen(u'encrypted signature length %d (%s), itag %s, %s' %
 825                                 (len(s), parts_sizes, url_data['itag'][0], player))
 826                         encrypted_sig = url_data['s'][0]
 827                         if age_gate:
 828                             signature = self._decrypt_signature_age_gate(encrypted_sig)
 829                         else:
 830                             signature = self._decrypt_signature(encrypted_sig)
 831                         url += '&signature=' + signature
 832                     if 'ratebypass' not in url:
 833                         url += '&ratebypass=yes'
 834                     url_map[url_data['itag'][0]] = url
 835             video_url_list = self._get_video_url_list(url_map)
 836             if not video_url_list:
 837                 return
 838         elif video_info.get('hlsvp'):
 839             manifest_url = video_info['hlsvp'][0]
 840             url_map = self._extract_from_m3u8(manifest_url, video_id)
 841             video_url_list = self._get_video_url_list(url_map)
 842             if not video_url_list:
 843                 return
 844
 845         else:
 846             raise ExtractorError(u'no conn or url_encoded_fmt_stream_map information found in video info')
 847
 848         results = []
 849         for format_param, video_real_url in video_url_list:
 850             # Extension
 851             video_extension = self._video_extensions.get(format_param, 'flv')
 852
 853             video_format = '{0} - {1}{2}'.format(format_param if format_param else video_extension,
 854                                               self._video_dimensions.get(format_param, '???'),
 855                                               ' ('+self._special_itags[format_param]+')' if format_param in self._special_itags else '')
 856
 857             results.append({
 858                 'id':       video_id,
 859                 'url':      video_real_url,
 860                 'uploader': video_uploader,
 861                 'uploader_id': video_uploader_id,
 862                 'upload_date':  upload_date,
 863                 'title':    video_title,
 864                 'ext':      video_extension,
 865                 'format':   video_format,
 866                 'thumbnail':    video_thumbnail,
 867                 'description':  video_description,
 868                 'player_url':   player_url,
 869                 'subtitles':    video_subtitles,
 870                 'duration':     video_duration
 871             })
 872         return results
 873
 874 class YoutubePlaylistIE(InfoExtractor):
 875     IE_DESC = u'YouTube.com playlists'
 876     _VALID_URL = r"""(?:
 877                         (?:https?://)?
 878                         (?:\w+\.)?
 879                         youtube\.com/
 880                         (?:
 881                            (?:course|view_play_list|my_playlists|artist|playlist|watch)
 882                            \? (?:.*?&)*? (?:p|a|list)=
 883                         |  p/
 884                         )
 885                         ((?:PL|EC|UU|FL)?[0-9A-Za-z-_]{10,})
 886                         .*
 887                      |
 888                         ((?:PL|EC|UU|FL)[0-9A-Za-z-_]{10,})
 889                      )"""
 890     _TEMPLATE_URL = 'https://gdata.youtube.com/feeds/api/playlists/%s?max-results=%i&start-index=%i&v=2&alt=json&safeSearch=none'
 891     _MAX_RESULTS = 50
 892     IE_NAME = u'youtube:playlist'
 893
 894     @classmethod
 895     def suitable(cls, url):
 896         """Receives a URL and returns True if suitable for this IE."""
 897         return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
 898
 899     def _real_extract(self, url):
 900         # Extract playlist id
 901         mobj = re.match(self._VALID_URL, url, re.VERBOSE)
 902         if mobj is None:
 903             raise ExtractorError(u'Invalid URL: %s' % url)
 904
 905         # Download playlist videos from API
 906         playlist_id = mobj.group(1) or mobj.group(2)
 907         videos = []
 908
 909         for page_num in itertools.count(1):
 910             start_index = self._MAX_RESULTS * (page_num - 1) + 1
 911             if start_index >= 1000:
 912                 self._downloader.report_warning(u'Max number of results reached')
 913                 break
 914             url = self._TEMPLATE_URL % (playlist_id, self._MAX_RESULTS, start_index)
 915             page = self._download_webpage(url, playlist_id, u'Downloading page #%s' % page_num)
 916
 917             try:
 918                 response = json.loads(page)
 919             except ValueError as err:
 920                 raise ExtractorError(u'Invalid JSON in API response: ' + compat_str(err))
 921
 922             if 'feed' not in response:
 923                 raise ExtractorError(u'Got a malformed response from YouTube API')
 924             playlist_title = response['feed']['title']['$t']
 925             if 'entry' not in response['feed']:
 926                 # Number of videos is a multiple of self._MAX_RESULTS
 927                 break
 928
 929             for entry in response['feed']['entry']:
 930                 index = entry['yt$position']['$t']
 931                 if 'media$group' in entry and 'media$player' in entry['media$group']:
 932                     videos.append((index, entry['media$group']['media$player']['url']))
 933
 934         videos = [v[1] for v in sorted(videos)]
 935
 936         url_results = [self.url_result(vurl, 'Youtube') for vurl in videos]
 937         return [self.playlist_result(url_results, playlist_id, playlist_title)]
 938
 939
 940 class YoutubeChannelIE(InfoExtractor):
 941     IE_DESC = u'YouTube.com channels'
 942     _VALID_URL = r"^(?:https?://)?(?:youtu\.be|(?:\w+\.)?youtube(?:-nocookie)?\.com)/channel/([0-9A-Za-z_-]+)"
 943     _TEMPLATE_URL = 'http://www.youtube.com/channel/%s/videos?sort=da&flow=list&view=0&page=%s&gl=US&hl=en'
 944     _MORE_PAGES_INDICATOR = 'yt-uix-load-more'
 945     _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'
 946     IE_NAME = u'youtube:channel'
 947
 948     def extract_videos_from_page(self, page):
 949         ids_in_page = []
 950         for mobj in re.finditer(r'href="/watch\?v=([0-9A-Za-z_-]+)&?', page):
 951             if mobj.group(1) not in ids_in_page:
 952                 ids_in_page.append(mobj.group(1))
 953         return ids_in_page
 954
 955     def _real_extract(self, url):
 956         # Extract channel id
 957         mobj = re.match(self._VALID_URL, url)
 958         if mobj is None:
 959             raise ExtractorError(u'Invalid URL: %s' % url)
 960
 961         # Download channel page
 962         channel_id = mobj.group(1)
 963         video_ids = []
 964         pagenum = 1
 965
 966         url = self._TEMPLATE_URL % (channel_id, pagenum)
 967         page = self._download_webpage(url, channel_id,
 968                                       u'Downloading page #%s' % pagenum)
 969
 970         # Extract video identifiers
 971         ids_in_page = self.extract_videos_from_page(page)
 972         video_ids.extend(ids_in_page)
 973
 974         # Download any subsequent channel pages using the json-based channel_ajax query
 975         if self._MORE_PAGES_INDICATOR in page:
 976             for pagenum in itertools.count(1):
 977                 url = self._MORE_PAGES_URL % (pagenum, channel_id)
 978                 page = self._download_webpage(url, channel_id,
 979                                               u'Downloading page #%s' % pagenum)
 980
 981                 page = json.loads(page)
 982
 983                 ids_in_page = self.extract_videos_from_page(page['content_html'])
 984                 video_ids.extend(ids_in_page)
 985
 986                 if self._MORE_PAGES_INDICATOR  not in page['load_more_widget_html']:
 987                     break
 988
 989         self._downloader.to_screen(u'[youtube] Channel %s: Found %i videos' % (channel_id, len(video_ids)))
 990
 991         urls = ['http://www.youtube.com/watch?v=%s' % id for id in video_ids]
 992         url_entries = [self.url_result(eurl, 'Youtube') for eurl in urls]
 993         return [self.playlist_result(url_entries, channel_id)]
 994
 995
 996 class YoutubeUserIE(InfoExtractor):
 997     IE_DESC = u'YouTube.com user videos (URL or "ytuser" keyword)'
 998     _VALID_URL = r'(?:(?:(?:https?://)?(?:\w+\.)?youtube\.com/user/)|ytuser:)([A-Za-z0-9_-]+)'
 999     _TEMPLATE_URL = 'http://gdata.youtube.com/feeds/api/users/%s'
1000     _GDATA_PAGE_SIZE = 50
1001     _GDATA_URL = 'http://gdata.youtube.com/feeds/api/users/%s/uploads?max-results=%d&start-index=%d'
1002     _VIDEO_INDICATOR = r'/watch\?v=(.+?)[\<&]'
1003     IE_NAME = u'youtube:user'
1004
1005     def _real_extract(self, url):
1006         # Extract username
1007         mobj = re.match(self._VALID_URL, url)
1008         if mobj is None:
1009             raise ExtractorError(u'Invalid URL: %s' % url)
1010
1011         username = mobj.group(1)
1012
1013         # Download video ids using YouTube Data API. Result size per
1014         # query is limited (currently to 50 videos) so we need to query
1015         # page by page until there are no video ids - it means we got
1016         # all of them.
1017
1018         video_ids = []
1019
1020         for pagenum in itertools.count(0):
1021             start_index = pagenum * self._GDATA_PAGE_SIZE + 1
1022
1023             gdata_url = self._GDATA_URL % (username, self._GDATA_PAGE_SIZE, start_index)
1024             page = self._download_webpage(gdata_url, username,
1025                                           u'Downloading video ids from %d to %d' % (start_index, start_index + self._GDATA_PAGE_SIZE))
1026
1027             # Extract video identifiers
1028             ids_in_page = []
1029
1030             for mobj in re.finditer(self._VIDEO_INDICATOR, page):
1031                 if mobj.group(1) not in ids_in_page:
1032                     ids_in_page.append(mobj.group(1))
1033
1034             video_ids.extend(ids_in_page)
1035
1036             # A little optimization - if current page is not
1037             # "full", ie. does not contain PAGE_SIZE video ids then
1038             # we can assume that this page is the last one - there
1039             # are no more ids on further pages - no need to query
1040             # again.
1041
1042             if len(ids_in_page) < self._GDATA_PAGE_SIZE:
1043                 break
1044
1045         urls = ['http://www.youtube.com/watch?v=%s' % video_id for video_id in video_ids]
1046         url_results = [self.url_result(rurl, 'Youtube') for rurl in urls]
1047         return [self.playlist_result(url_results, playlist_title = username)]
1048
1049 class YoutubeSearchIE(SearchInfoExtractor):
1050     IE_DESC = u'YouTube.com searches'
1051     _API_URL = 'https://gdata.youtube.com/feeds/api/videos?q=%s&start-index=%i&max-results=50&v=2&alt=jsonc'
1052     _MAX_RESULTS = 1000
1053     IE_NAME = u'youtube:search'
1054     _SEARCH_KEY = 'ytsearch'
1055
1056     def report_download_page(self, query, pagenum):
1057         """Report attempt to download search page with given number."""
1058         self._downloader.to_screen(u'[youtube] query "%s": Downloading page %s' % (query, pagenum))
1059
1060     def _get_n_results(self, query, n):
1061         """Get a specified number of results for a query"""
1062
1063         video_ids = []
1064         pagenum = 0
1065         limit = n
1066
1067         while (50 * pagenum) < limit:
1068             self.report_download_page(query, pagenum+1)
1069             result_url = self._API_URL % (compat_urllib_parse.quote_plus(query), (50*pagenum)+1)
1070             request = compat_urllib_request.Request(result_url)
1071             try:
1072                 data = compat_urllib_request.urlopen(request).read().decode('utf-8')
1073             except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
1074                 raise ExtractorError(u'Unable to download API page: %s' % compat_str(err))
1075             api_response = json.loads(data)['data']
1076
1077             if not 'items' in api_response:
1078                 raise ExtractorError(u'[youtube] No video results')
1079
1080             new_ids = list(video['id'] for video in api_response['items'])
1081             video_ids += new_ids
1082
1083             limit = min(n, api_response['totalItems'])
1084             pagenum += 1
1085
1086         if len(video_ids) > n:
1087             video_ids = video_ids[:n]
1088         videos = [self.url_result('http://www.youtube.com/watch?v=%s' % id, 'Youtube') for id in video_ids]
1089         return self.playlist_result(videos, query)
1090
1091
1092 class YoutubeShowIE(InfoExtractor):
1093     IE_DESC = u'YouTube.com (multi-season) shows'
1094     _VALID_URL = r'https?://www\.youtube\.com/show/(.*)'
1095     IE_NAME = u'youtube:show'
1096
1097     def _real_extract(self, url):
1098         mobj = re.match(self._VALID_URL, url)
1099         show_name = mobj.group(1)
1100         webpage = self._download_webpage(url, show_name, u'Downloading show webpage')
1101         # There's one playlist for each season of the show
1102         m_seasons = list(re.finditer(r'href="(/playlist\?list=.*?)"', webpage))
1103         self.to_screen(u'%s: Found %s seasons' % (show_name, len(m_seasons)))
1104         return [self.url_result('https://www.youtube.com' + season.group(1), 'YoutubePlaylist') for season in m_seasons]
1105
1106
1107 class YoutubeFeedsInfoExtractor(YoutubeBaseInfoExtractor):
1108     """
1109     Base class for extractors that fetch info from
1110     http://www.youtube.com/feed_ajax
1111     Subclasses must define the _FEED_NAME and _PLAYLIST_TITLE properties.
1112     """
1113     _LOGIN_REQUIRED = True
1114     _PAGING_STEP = 30
1115     # use action_load_personal_feed instead of action_load_system_feed
1116     _PERSONAL_FEED = False
1117
1118     @property
1119     def _FEED_TEMPLATE(self):
1120         action = 'action_load_system_feed'
1121         if self._PERSONAL_FEED:
1122             action = 'action_load_personal_feed'
1123         return 'http://www.youtube.com/feed_ajax?%s=1&feed_name=%s&paging=%%s' % (action, self._FEED_NAME)
1124
1125     @property
1126     def IE_NAME(self):
1127         return u'youtube:%s' % self._FEED_NAME
1128
1129     def _real_initialize(self):
1130         self._login()
1131
1132     def _real_extract(self, url):
1133         feed_entries = []
1134         # The step argument is available only in 2.7 or higher
1135         for i in itertools.count(0):
1136             paging = i*self._PAGING_STEP
1137             info = self._download_webpage(self._FEED_TEMPLATE % paging,
1138                                           u'%s feed' % self._FEED_NAME,
1139                                           u'Downloading page %s' % i)
1140             info = json.loads(info)
1141             feed_html = info['feed_html']
1142             m_ids = re.finditer(r'"/watch\?v=(.*?)["&]', feed_html)
1143             ids = orderedSet(m.group(1) for m in m_ids)
1144             feed_entries.extend(self.url_result(id, 'Youtube') for id in ids)
1145             if info['paging'] is None:
1146                 break
1147         return self.playlist_result(feed_entries, playlist_title=self._PLAYLIST_TITLE)
1148
1149 class YoutubeSubscriptionsIE(YoutubeFeedsInfoExtractor):
1150     IE_DESC = u'YouTube.com subscriptions feed, "ytsubs" keyword(requires authentication)'
1151     _VALID_URL = r'https?://www\.youtube\.com/feed/subscriptions|:ytsubs(?:criptions)?'
1152     _FEED_NAME = 'subscriptions'
1153     _PLAYLIST_TITLE = u'Youtube Subscriptions'
1154
1155 class YoutubeRecommendedIE(YoutubeFeedsInfoExtractor):
1156     IE_DESC = u'YouTube.com recommended videos, "ytrec" keyword (requires authentication)'
1157     _VALID_URL = r'https?://www\.youtube\.com/feed/recommended|:ytrec(?:ommended)?'
1158     _FEED_NAME = 'recommended'
1159     _PLAYLIST_TITLE = u'Youtube Recommended videos'
1160
1161 class YoutubeWatchLaterIE(YoutubeFeedsInfoExtractor):
1162     IE_DESC = u'Youtube watch later list, "ytwatchlater" keyword (requires authentication)'
1163     _VALID_URL = r'https?://www\.youtube\.com/feed/watch_later|:ytwatchlater'
1164     _FEED_NAME = 'watch_later'
1165     _PLAYLIST_TITLE = u'Youtube Watch Later'
1166     _PAGING_STEP = 100
1167     _PERSONAL_FEED = True
1168
1169 class YoutubeFavouritesIE(YoutubeBaseInfoExtractor):
1170     IE_NAME = u'youtube:favorites'
1171     IE_DESC = u'YouTube.com favourite videos, "ytfav" keyword (requires authentication)'
1172     _VALID_URL = r'https?://www\.youtube\.com/my_favorites|:ytfav(?:o?rites)?'
1173     _LOGIN_REQUIRED = True
1174
1175     def _real_extract(self, url):
1176         webpage = self._download_webpage('https://www.youtube.com/my_favorites', 'Youtube Favourites videos')
1177         playlist_id = self._search_regex(r'list=(.+?)["&]', webpage, u'favourites playlist id')
1178         return self.url_result(playlist_id, 'YoutubePlaylist')