_ 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     int_or_none,
  31     PagedList,
  32     RegexNotFoundError,
  33     unescapeHTML,
  34     unified_strdate,
  35     orderedSet,
  36     write_json_file,
  37 )
  38
  39 class YoutubeBaseInfoExtractor(InfoExtractor):
  40     """Provide base functions for Youtube extractors"""
  41     _LOGIN_URL = 'https://accounts.google.com/ServiceLogin'
  42     _LANG_URL = r'https://www.youtube.com/?hl=en&persist_hl=1&gl=US&persist_gl=1&opt_out_ackd=1'
  43     _AGE_URL = 'http://www.youtube.com/verify_age?next_url=/&gl=US&hl=en'
  44     _NETRC_MACHINE = 'youtube'
  45     # If True it will raise an error if no login info is provided
  46     _LOGIN_REQUIRED = False
  47
  48     def _set_language(self):
  49         return bool(self._download_webpage(
  50             self._LANG_URL, None,
  51             note=u'Setting language', errnote='unable to set language',
  52             fatal=False))
  53
  54     def _login(self):
  55         (username, password) = self._get_login_info()
  56         # No authentication to be performed
  57         if username is None:
  58             if self._LOGIN_REQUIRED:
  59                 raise ExtractorError(u'No login info available, needed for using %s.' % self.IE_NAME, expected=True)
  60             return False
  61
  62         login_page = self._download_webpage(
  63             self._LOGIN_URL, None,
  64             note=u'Downloading login page',
  65             errnote=u'unable to fetch login page', fatal=False)
  66         if login_page is False:
  67             return
  68
  69         galx = self._search_regex(r'(?s)<input.+?name="GALX".+?value="(.+?)"',
  70                                   login_page, u'Login GALX parameter')
  71
  72         # Log in
  73         login_form_strs = {
  74                 u'continue': u'https://www.youtube.com/signin?action_handle_signin=true&feature=sign_in_button&hl=en_US&nomobiletemp=1',
  75                 u'Email': username,
  76                 u'GALX': galx,
  77                 u'Passwd': password,
  78                 u'PersistentCookie': u'yes',
  79                 u'_utf8': u'霱',
  80                 u'bgresponse': u'js_disabled',
  81                 u'checkConnection': u'',
  82                 u'checkedDomains': u'youtube',
  83                 u'dnConn': u'',
  84                 u'pstMsg': u'0',
  85                 u'rmShown': u'1',
  86                 u'secTok': u'',
  87                 u'signIn': u'Sign in',
  88                 u'timeStmp': u'',
  89                 u'service': u'youtube',
  90                 u'uilel': u'3',
  91                 u'hl': u'en_US',
  92         }
  93         # Convert to UTF-8 *before* urlencode because Python 2.x's urlencode
  94         # chokes on unicode
  95         login_form = dict((k.encode('utf-8'), v.encode('utf-8')) for k,v in login_form_strs.items())
  96         login_data = compat_urllib_parse.urlencode(login_form).encode('ascii')
  97
  98         req = compat_urllib_request.Request(self._LOGIN_URL, login_data)
  99         login_results = self._download_webpage(
 100             req, None,
 101             note=u'Logging in', errnote=u'unable to log in', fatal=False)
 102         if login_results is False:
 103             return False
 104         if re.search(r'(?i)<form[^>]* id="gaia_loginform"', login_results) is not None:
 105             self._downloader.report_warning(u'unable to log in: bad username or password')
 106             return False
 107         return True
 108
 109     def _confirm_age(self):
 110         age_form = {
 111             'next_url': '/',
 112             'action_confirm': 'Confirm',
 113         }
 114         req = compat_urllib_request.Request(self._AGE_URL, compat_urllib_parse.urlencode(age_form))
 115
 116         self._download_webpage(
 117             req, None,
 118             note=u'Confirming age', errnote=u'Unable to confirm age')
 119         return True
 120
 121     def _real_initialize(self):
 122         if self._downloader is None:
 123             return
 124         if not self._set_language():
 125             return
 126         if not self._login():
 127             return
 128         self._confirm_age()
 129
 130
 131 class YoutubeIE(YoutubeBaseInfoExtractor, SubtitlesInfoExtractor):
 132     IE_DESC = u'YouTube.com'
 133     _VALID_URL = r"""(?x)^
 134                      (
 135                          (?:https?://|//)?                                    # http(s):// or protocol-independent URL (optional)
 136                          (?:(?:(?:(?:\w+\.)?[yY][oO][uU][tT][uU][bB][eE](?:-nocookie)?\.com/|
 137                             (?:www\.)?deturl\.com/www\.youtube\.com/|
 138                             (?:www\.)?pwnyoutube\.com|
 139                             tube\.majestyc\.net/|
 140                             youtube\.googleapis\.com/)                        # the various hostnames, with wildcard subdomains
 141                          (?:.*?\#/)?                                          # handle anchor (#/) redirect urls
 142                          (?:                                                  # the various things that can precede the ID:
 143                              (?:(?:v|embed|e)/)                               # v/ or embed/ or e/
 144                              |(?:                                             # or the v= param in all its forms
 145                                  (?:(?:watch|movie)(?:_popup)?(?:\.php)?)?    # preceding watch(_popup|.php) or nothing (like /?v=xxxx)
 146                                  (?:\?|\#!?)                                  # the params delimiter ? or # or #!
 147                                  (?:.*?&)?                                    # any other preceding param (like /?s=tuff&v=xxxx)
 148                                  v=
 149                              )
 150                          ))
 151                          |youtu\.be/                                          # just youtu.be/xxxx
 152                          )
 153                      )?                                                       # all until now is optional -> you can pass the naked ID
 154                      ([0-9A-Za-z_-]{11})                                      # here is it! the YouTube video ID
 155                      (?(1).+)?                                                # if we found the ID, everything can follow
 156                      $"""
 157     _NEXT_URL_RE = r'[\?&]next_url=([^&]+)'
 158     _formats = {
 159         '5': {'ext': 'flv', 'width': 400, 'height': 240},
 160         '6': {'ext': 'flv', 'width': 450, 'height': 270},
 161         '13': {'ext': '3gp'},
 162         '17': {'ext': '3gp', 'width': 176, 'height': 144},
 163         '18': {'ext': 'mp4', 'width': 640, 'height': 360},
 164         '22': {'ext': 'mp4', 'width': 1280, 'height': 720},
 165         '34': {'ext': 'flv', 'width': 640, 'height': 360},
 166         '35': {'ext': 'flv', 'width': 854, 'height': 480},
 167         '36': {'ext': '3gp', 'width': 320, 'height': 240},
 168         '37': {'ext': 'mp4', 'width': 1920, 'height': 1080},
 169         '38': {'ext': 'mp4', 'width': 4096, 'height': 3072},
 170         '43': {'ext': 'webm', 'width': 640, 'height': 360},
 171         '44': {'ext': 'webm', 'width': 854, 'height': 480},
 172         '45': {'ext': 'webm', 'width': 1280, 'height': 720},
 173         '46': {'ext': 'webm', 'width': 1920, 'height': 1080},
 174
 175
 176         # 3d videos
 177         '82': {'ext': 'mp4', 'height': 360, 'resolution': '360p', 'format_note': '3D', 'preference': -20},
 178         '83': {'ext': 'mp4', 'height': 480, 'resolution': '480p', 'format_note': '3D', 'preference': -20},
 179         '84': {'ext': 'mp4', 'height': 720, 'resolution': '720p', 'format_note': '3D', 'preference': -20},
 180         '85': {'ext': 'mp4', 'height': 1080, 'resolution': '1080p', 'format_note': '3D', 'preference': -20},
 181         '100': {'ext': 'webm', 'height': 360, 'resolution': '360p', 'format_note': '3D', 'preference': -20},
 182         '101': {'ext': 'webm', 'height': 480, 'resolution': '480p', 'format_note': '3D', 'preference': -20},
 183         '102': {'ext': 'webm', 'height': 720, 'resolution': '720p', 'format_note': '3D', 'preference': -20},
 184
 185         # Apple HTTP Live Streaming
 186         '92': {'ext': 'mp4', 'height': 240, 'resolution': '240p', 'format_note': 'HLS', 'preference': -10},
 187         '93': {'ext': 'mp4', 'height': 360, 'resolution': '360p', 'format_note': 'HLS', 'preference': -10},
 188         '94': {'ext': 'mp4', 'height': 480, 'resolution': '480p', 'format_note': 'HLS', 'preference': -10},
 189         '95': {'ext': 'mp4', 'height': 720, 'resolution': '720p', 'format_note': 'HLS', 'preference': -10},
 190         '96': {'ext': 'mp4', 'height': 1080, 'resolution': '1080p', 'format_note': 'HLS', 'preference': -10},
 191         '132': {'ext': 'mp4', 'height': 240, 'resolution': '240p', 'format_note': 'HLS', 'preference': -10},
 192         '151': {'ext': 'mp4', 'height': 72, 'resolution': '72p', 'format_note': 'HLS', 'preference': -10},
 193
 194         # DASH mp4 video
 195         '133': {'ext': 'mp4', 'height': 240, 'resolution': '240p', 'format_note': 'DASH video', 'preference': -40},
 196         '134': {'ext': 'mp4', 'height': 360, 'resolution': '360p', 'format_note': 'DASH video', 'preference': -40},
 197         '135': {'ext': 'mp4', 'height': 480, 'resolution': '480p', 'format_note': 'DASH video', 'preference': -40},
 198         '136': {'ext': 'mp4', 'height': 720, 'resolution': '720p', 'format_note': 'DASH video', 'preference': -40},
 199         '137': {'ext': 'mp4', 'height': 1080, 'resolution': '1080p', 'format_note': 'DASH video', 'preference': -40},
 200         '138': {'ext': 'mp4', 'height': 1081, 'resolution': '>1080p', 'format_note': 'DASH video', 'preference': -40},
 201         '160': {'ext': 'mp4', 'height': 192, 'resolution': '192p', 'format_note': 'DASH video', 'preference': -40},
 202         '264': {'ext': 'mp4', 'height': 1080, 'resolution': '1080p', 'format_note': 'DASH video', 'preference': -40},
 203
 204         # Dash mp4 audio
 205         '139': {'ext': 'm4a', 'format_note': 'DASH audio', 'vcodec': 'none', 'abr': 48, 'preference': -50},
 206         '140': {'ext': 'm4a', 'format_note': 'DASH audio', 'vcodec': 'none', 'abr': 128, 'preference': -50},
 207         '141': {'ext': 'm4a', 'format_note': 'DASH audio', 'vcodec': 'none', 'abr': 256, 'preference': -50},
 208
 209         # Dash webm
 210         '167': {'ext': 'webm', 'height': 360, 'width': 640, 'format_note': 'DASH video', 'container': 'webm', 'vcodec': 'VP8', 'acodec': 'none', 'preference': -40},
 211         '168': {'ext': 'webm', 'height': 480, 'width': 854, 'format_note': 'DASH video', 'container': 'webm', 'vcodec': 'VP8', 'acodec': 'none', 'preference': -40},
 212         '168': {'ext': 'webm', 'height': 1080, 'width': 1920, 'format_note': 'DASH video', 'container': 'webm', 'vcodec': 'VP8', 'acodec': 'none', 'preference': -40},
 213         '218': {'ext': 'webm', 'height': 480, 'width': 854, 'format_note': 'DASH video', 'container': 'webm', 'vcodec': 'VP8', 'acodec': 'none', 'preference': -40},
 214         '219': {'ext': 'webm', 'height': 480, 'width': 854, 'format_note': 'DASH video', 'container': 'webm', 'vcodec': 'VP8', 'acodec': 'none', 'preference': -40},
 215         '242': {'ext': 'webm', 'height': 240, 'resolution': '240p', 'format_note': 'DASH webm', 'preference': -40},
 216         '243': {'ext': 'webm', 'height': 360, 'resolution': '360p', 'format_note': 'DASH webm', 'preference': -40},
 217         '244': {'ext': 'webm', 'height': 480, 'resolution': '480p', 'format_note': 'DASH webm', 'preference': -40},
 218         '245': {'ext': 'webm', 'height': 480, 'resolution': '480p', 'format_note': 'DASH webm', 'preference': -40},
 219         '246': {'ext': 'webm', 'height': 480, 'resolution': '480p', 'format_note': 'DASH webm', 'preference': -40},
 220         '247': {'ext': 'webm', 'height': 720, 'resolution': '720p', 'format_note': 'DASH webm', 'preference': -40},
 221         '248': {'ext': 'webm', 'height': 1080, 'resolution': '1080p', 'format_note': 'DASH webm', 'preference': -40},
 222
 223         # Dash webm audio
 224         '171': {'ext': 'webm', 'vcodec': 'none', 'format_note': 'DASH webm audio', 'abr': 48, 'preference': -50},
 225         '172': {'ext': 'webm', 'vcodec': 'none', 'format_note': 'DASH webm audio', 'abr': 256, 'preference': -50},
 226
 227         # RTMP (unnamed)
 228         '_rtmp': {'protocol': 'rtmp'},
 229     }
 230
 231     IE_NAME = u'youtube'
 232     _TESTS = [
 233         {
 234             u"url":  u"http://www.youtube.com/watch?v=BaW_jenozKc",
 235             u"file":  u"BaW_jenozKc.mp4",
 236             u"info_dict": {
 237                 u"title": u"youtube-dl test video \"'/\\ä↭𝕐",
 238                 u"uploader": u"Philipp Hagemeister",
 239                 u"uploader_id": u"phihag",
 240                 u"upload_date": u"20121002",
 241                 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 ."
 242             }
 243         },
 244         {
 245             u"url":  u"http://www.youtube.com/watch?v=UxxajLWwzqY",
 246             u"file":  u"UxxajLWwzqY.mp4",
 247             u"note": u"Test generic use_cipher_signature video (#897)",
 248             u"info_dict": {
 249                 u"upload_date": u"20120506",
 250                 u"title": u"Icona Pop - I Love It (feat. Charli XCX) [OFFICIAL VIDEO]",
 251                 u"description": u"md5:5b292926389560516e384ac437c0ec07",
 252                 u"uploader": u"Icona Pop",
 253                 u"uploader_id": u"IconaPop"
 254             }
 255         },
 256         {
 257             u"url":  u"https://www.youtube.com/watch?v=07FYdnEawAQ",
 258             u"file":  u"07FYdnEawAQ.mp4",
 259             u"note": u"Test VEVO video with age protection (#956)",
 260             u"info_dict": {
 261                 u"upload_date": u"20130703",
 262                 u"title": u"Justin Timberlake - Tunnel Vision (Explicit)",
 263                 u"description": u"md5:64249768eec3bc4276236606ea996373",
 264                 u"uploader": u"justintimberlakeVEVO",
 265                 u"uploader_id": u"justintimberlakeVEVO"
 266             }
 267         },
 268         {
 269             u"url":  u"//www.YouTube.com/watch?v=yZIXLfi8CZQ",
 270             u"file":  u"yZIXLfi8CZQ.mp4",
 271             u"note": u"Embed-only video (#1746)",
 272             u"info_dict": {
 273                 u"upload_date": u"20120608",
 274                 u"title": u"Principal Sexually Assaults A Teacher - Episode 117 - 8th June 2012",
 275                 u"description": u"md5:09b78bd971f1e3e289601dfba15ca4f7",
 276                 u"uploader": u"SET India",
 277                 u"uploader_id": u"setindia"
 278             }
 279         },
 280         {
 281             u"url": u"http://www.youtube.com/watch?v=a9LDPn-MO4I",
 282             u"file": u"a9LDPn-MO4I.m4a",
 283             u"note": u"256k DASH audio (format 141) via DASH manifest",
 284             u"info_dict": {
 285                 u"upload_date": "20121002",
 286                 u"uploader_id": "8KVIDEO",
 287                 u"description": "No description available.",
 288                 u"uploader": "8KVIDEO",
 289                 u"title": "UHDTV TEST 8K VIDEO.mp4"
 290             },
 291             u"params": {
 292                 u"youtube_include_dash_manifest": True,
 293                 u"format": "141",
 294             },
 295         },
 296     ]
 297
 298
 299     @classmethod
 300     def suitable(cls, url):
 301         """Receives a URL and returns True if suitable for this IE."""
 302         if YoutubePlaylistIE.suitable(url): return False
 303         return re.match(cls._VALID_URL, url) is not None
 304
 305     def __init__(self, *args, **kwargs):
 306         super(YoutubeIE, self).__init__(*args, **kwargs)
 307         self._player_cache = {}
 308
 309     def report_video_info_webpage_download(self, video_id):
 310         """Report attempt to download video info webpage."""
 311         self.to_screen(u'%s: Downloading video info webpage' % video_id)
 312
 313     def report_information_extraction(self, video_id):
 314         """Report attempt to extract video information."""
 315         self.to_screen(u'%s: Extracting video information' % video_id)
 316
 317     def report_unavailable_format(self, video_id, format):
 318         """Report extracted video URL."""
 319         self.to_screen(u'%s: Format %s not available' % (video_id, format))
 320
 321     def report_rtmp_download(self):
 322         """Indicate the download will use the RTMP protocol."""
 323         self.to_screen(u'RTMP download detected')
 324
 325     def _extract_signature_function(self, video_id, player_url, slen):
 326         id_m = re.match(r'.*-(?P<id>[a-zA-Z0-9_-]+)\.(?P<ext>[a-z]+)$',
 327                         player_url)
 328         player_type = id_m.group('ext')
 329         player_id = id_m.group('id')
 330
 331         # Read from filesystem cache
 332         func_id = '%s_%s_%d' % (player_type, player_id, slen)
 333         assert os.path.basename(func_id) == func_id
 334         cache_dir = get_cachedir(self._downloader.params)
 335
 336         cache_enabled = cache_dir is not None
 337         if cache_enabled:
 338             cache_fn = os.path.join(os.path.expanduser(cache_dir),
 339                                     u'youtube-sigfuncs',
 340                                     func_id + '.json')
 341             try:
 342                 with io.open(cache_fn, 'r', encoding='utf-8') as cachef:
 343                     cache_spec = json.load(cachef)
 344                 return lambda s: u''.join(s[i] for i in cache_spec)
 345             except IOError:
 346                 pass  # No cache available
 347
 348         if player_type == 'js':
 349             code = self._download_webpage(
 350                 player_url, video_id,
 351                 note=u'Downloading %s player %s' % (player_type, player_id),
 352                 errnote=u'Download of %s failed' % player_url)
 353             res = self._parse_sig_js(code)
 354         elif player_type == 'swf':
 355             urlh = self._request_webpage(
 356                 player_url, video_id,
 357                 note=u'Downloading %s player %s' % (player_type, player_id),
 358                 errnote=u'Download of %s failed' % player_url)
 359             code = urlh.read()
 360             res = self._parse_sig_swf(code)
 361         else:
 362             assert False, 'Invalid player type %r' % player_type
 363
 364         if cache_enabled:
 365             try:
 366                 test_string = u''.join(map(compat_chr, range(slen)))
 367                 cache_res = res(test_string)
 368                 cache_spec = [ord(c) for c in cache_res]
 369                 try:
 370                     os.makedirs(os.path.dirname(cache_fn))
 371                 except OSError as ose:
 372                     if ose.errno != errno.EEXIST:
 373                         raise
 374                 write_json_file(cache_spec, cache_fn)
 375             except Exception:
 376                 tb = traceback.format_exc()
 377                 self._downloader.report_warning(
 378                     u'Writing cache to %r failed: %s' % (cache_fn, tb))
 379
 380         return res
 381
 382     def _print_sig_code(self, func, slen):
 383         def gen_sig_code(idxs):
 384             def _genslice(start, end, step):
 385                 starts = u'' if start == 0 else str(start)
 386                 ends = (u':%d' % (end+step)) if end + step >= 0 else u':'
 387                 steps = u'' if step == 1 else (u':%d' % step)
 388                 return u's[%s%s%s]' % (starts, ends, steps)
 389
 390             step = None
 391             start = '(Never used)'  # Quelch pyflakes warnings - start will be
 392                                     # set as soon as step is set
 393             for i, prev in zip(idxs[1:], idxs[:-1]):
 394                 if step is not None:
 395                     if i - prev == step:
 396                         continue
 397                     yield _genslice(start, prev, step)
 398                     step = None
 399                     continue
 400                 if i - prev in [-1, 1]:
 401                     step = i - prev
 402                     start = prev
 403                     continue
 404                 else:
 405                     yield u's[%d]' % prev
 406             if step is None:
 407                 yield u's[%d]' % i
 408             else:
 409                 yield _genslice(start, i, step)
 410
 411         test_string = u''.join(map(compat_chr, range(slen)))
 412         cache_res = func(test_string)
 413         cache_spec = [ord(c) for c in cache_res]
 414         expr_code = u' + '.join(gen_sig_code(cache_spec))
 415         code = u'if len(s) == %d:\n    return %s\n' % (slen, expr_code)
 416         self.to_screen(u'Extracted signature function:\n' + code)
 417
 418     def _parse_sig_js(self, jscode):
 419         funcname = self._search_regex(
 420             r'signature=([a-zA-Z]+)', jscode,
 421             u'Initial JS player signature function name')
 422
 423         functions = {}
 424
 425         def argidx(varname):
 426             return string.lowercase.index(varname)
 427
 428         def interpret_statement(stmt, local_vars, allow_recursion=20):
 429             if allow_recursion < 0:
 430                 raise ExtractorError(u'Recursion limit reached')
 431
 432             if stmt.startswith(u'var '):
 433                 stmt = stmt[len(u'var '):]
 434             ass_m = re.match(r'^(?P<out>[a-z]+)(?:\[(?P<index>[^\]]+)\])?' +
 435                              r'=(?P<expr>.*)$', stmt)
 436             if ass_m:
 437                 if ass_m.groupdict().get('index'):
 438                     def assign(val):
 439                         lvar = local_vars[ass_m.group('out')]
 440                         idx = interpret_expression(ass_m.group('index'),
 441                                                    local_vars, allow_recursion)
 442                         assert isinstance(idx, int)
 443                         lvar[idx] = val
 444                         return val
 445                     expr = ass_m.group('expr')
 446                 else:
 447                     def assign(val):
 448                         local_vars[ass_m.group('out')] = val
 449                         return val
 450                     expr = ass_m.group('expr')
 451             elif stmt.startswith(u'return '):
 452                 assign = lambda v: v
 453                 expr = stmt[len(u'return '):]
 454             else:
 455                 raise ExtractorError(
 456                     u'Cannot determine left side of statement in %r' % stmt)
 457
 458             v = interpret_expression(expr, local_vars, allow_recursion)
 459             return assign(v)
 460
 461         def interpret_expression(expr, local_vars, allow_recursion):
 462             if expr.isdigit():
 463                 return int(expr)
 464
 465             if expr.isalpha():
 466                 return local_vars[expr]
 467
 468             m = re.match(r'^(?P<in>[a-z]+)\.(?P<member>.*)$', expr)
 469             if m:
 470                 member = m.group('member')
 471                 val = local_vars[m.group('in')]
 472                 if member == 'split("")':
 473                     return list(val)
 474                 if member == 'join("")':
 475                     return u''.join(val)
 476                 if member == 'length':
 477                     return len(val)
 478                 if member == 'reverse()':
 479                     return val[::-1]
 480                 slice_m = re.match(r'slice\((?P<idx>.*)\)', member)
 481                 if slice_m:
 482                     idx = interpret_expression(
 483                         slice_m.group('idx'), local_vars, allow_recursion-1)
 484                     return val[idx:]
 485
 486             m = re.match(
 487                 r'^(?P<in>[a-z]+)\[(?P<idx>.+)\]$', expr)
 488             if m:
 489                 val = local_vars[m.group('in')]
 490                 idx = interpret_expression(m.group('idx'), local_vars,
 491                                            allow_recursion-1)
 492                 return val[idx]
 493
 494             m = re.match(r'^(?P<a>.+?)(?P<op>[%])(?P<b>.+?)$', expr)
 495             if m:
 496                 a = interpret_expression(m.group('a'),
 497                                          local_vars, allow_recursion)
 498                 b = interpret_expression(m.group('b'),
 499                                          local_vars, allow_recursion)
 500                 return a % b
 501
 502             m = re.match(
 503                 r'^(?P<func>[a-zA-Z]+)\((?P<args>[a-z0-9,]+)\)$', expr)
 504             if m:
 505                 fname = m.group('func')
 506                 if fname not in functions:
 507                     functions[fname] = extract_function(fname)
 508                 argvals = [int(v) if v.isdigit() else local_vars[v]
 509                            for v in m.group('args').split(',')]
 510                 return functions[fname](argvals)
 511             raise ExtractorError(u'Unsupported JS expression %r' % expr)
 512
 513         def extract_function(funcname):
 514             func_m = re.search(
 515                 r'function ' + re.escape(funcname) +
 516                 r'\((?P<args>[a-z,]+)\){(?P<code>[^}]+)}',
 517                 jscode)
 518             argnames = func_m.group('args').split(',')
 519
 520             def resf(args):
 521                 local_vars = dict(zip(argnames, args))
 522                 for stmt in func_m.group('code').split(';'):
 523                     res = interpret_statement(stmt, local_vars)
 524                 return res
 525             return resf
 526
 527         initial_function = extract_function(funcname)
 528         return lambda s: initial_function([s])
 529
 530     def _parse_sig_swf(self, file_contents):
 531         if file_contents[1:3] != b'WS':
 532             raise ExtractorError(
 533                 u'Not an SWF file; header is %r' % file_contents[:3])
 534         if file_contents[:1] == b'C':
 535             content = zlib.decompress(file_contents[8:])
 536         else:
 537             raise NotImplementedError(u'Unsupported compression format %r' %
 538                                       file_contents[:1])
 539
 540         def extract_tags(content):
 541             pos = 0
 542             while pos < len(content):
 543                 header16 = struct.unpack('<H', content[pos:pos+2])[0]
 544                 pos += 2
 545                 tag_code = header16 >> 6
 546                 tag_len = header16 & 0x3f
 547                 if tag_len == 0x3f:
 548                     tag_len = struct.unpack('<I', content[pos:pos+4])[0]
 549                     pos += 4
 550                 assert pos+tag_len <= len(content)
 551                 yield (tag_code, content[pos:pos+tag_len])
 552                 pos += tag_len
 553
 554         code_tag = next(tag
 555                         for tag_code, tag in extract_tags(content)
 556                         if tag_code == 82)
 557         p = code_tag.index(b'\0', 4) + 1
 558         code_reader = io.BytesIO(code_tag[p:])
 559
 560         # Parse ABC (AVM2 ByteCode)
 561         def read_int(reader=None):
 562             if reader is None:
 563                 reader = code_reader
 564             res = 0
 565             shift = 0
 566             for _ in range(5):
 567                 buf = reader.read(1)
 568                 assert len(buf) == 1
 569                 b = struct.unpack('<B', buf)[0]
 570                 res = res | ((b & 0x7f) << shift)
 571                 if b & 0x80 == 0:
 572                     break
 573                 shift += 7
 574             return res
 575
 576         def u30(reader=None):
 577             res = read_int(reader)
 578             assert res & 0xf0000000 == 0
 579             return res
 580         u32 = read_int
 581
 582         def s32(reader=None):
 583             v = read_int(reader)
 584             if v & 0x80000000 != 0:
 585                 v = - ((v ^ 0xffffffff) + 1)
 586             return v
 587
 588         def read_string(reader=None):
 589             if reader is None:
 590                 reader = code_reader
 591             slen = u30(reader)
 592             resb = reader.read(slen)
 593             assert len(resb) == slen
 594             return resb.decode('utf-8')
 595
 596         def read_bytes(count, reader=None):
 597             if reader is None:
 598                 reader = code_reader
 599             resb = reader.read(count)
 600             assert len(resb) == count
 601             return resb
 602
 603         def read_byte(reader=None):
 604             resb = read_bytes(1, reader=reader)
 605             res = struct.unpack('<B', resb)[0]
 606             return res
 607
 608         # minor_version + major_version
 609         read_bytes(2 + 2)
 610
 611         # Constant pool
 612         int_count = u30()
 613         for _c in range(1, int_count):
 614             s32()
 615         uint_count = u30()
 616         for _c in range(1, uint_count):
 617             u32()
 618         double_count = u30()
 619         read_bytes((double_count-1) * 8)
 620         string_count = u30()
 621         constant_strings = [u'']
 622         for _c in range(1, string_count):
 623             s = read_string()
 624             constant_strings.append(s)
 625         namespace_count = u30()
 626         for _c in range(1, namespace_count):
 627             read_bytes(1)  # kind
 628             u30()  # name
 629         ns_set_count = u30()
 630         for _c in range(1, ns_set_count):
 631             count = u30()
 632             for _c2 in range(count):
 633                 u30()
 634         multiname_count = u30()
 635         MULTINAME_SIZES = {
 636             0x07: 2,  # QName
 637             0x0d: 2,  # QNameA
 638             0x0f: 1,  # RTQName
 639             0x10: 1,  # RTQNameA
 640             0x11: 0,  # RTQNameL
 641             0x12: 0,  # RTQNameLA
 642             0x09: 2,  # Multiname
 643             0x0e: 2,  # MultinameA
 644             0x1b: 1,  # MultinameL
 645             0x1c: 1,  # MultinameLA
 646         }
 647         multinames = [u'']
 648         for _c in range(1, multiname_count):
 649             kind = u30()
 650             assert kind in MULTINAME_SIZES, u'Invalid multiname kind %r' % kind
 651             if kind == 0x07:
 652                 u30()  # namespace_idx
 653                 name_idx = u30()
 654                 multinames.append(constant_strings[name_idx])
 655             else:
 656                 multinames.append('[MULTINAME kind: %d]' % kind)
 657                 for _c2 in range(MULTINAME_SIZES[kind]):
 658                     u30()
 659
 660         # Methods
 661         method_count = u30()
 662         MethodInfo = collections.namedtuple(
 663             'MethodInfo',
 664             ['NEED_ARGUMENTS', 'NEED_REST'])
 665         method_infos = []
 666         for method_id in range(method_count):
 667             param_count = u30()
 668             u30()  # return type
 669             for _ in range(param_count):
 670                 u30()  # param type
 671             u30()  # name index (always 0 for youtube)
 672             flags = read_byte()
 673             if flags & 0x08 != 0:
 674                 # Options present
 675                 option_count = u30()
 676                 for c in range(option_count):
 677                     u30()  # val
 678                     read_bytes(1)  # kind
 679             if flags & 0x80 != 0:
 680                 # Param names present
 681                 for _ in range(param_count):
 682                     u30()  # param name
 683             mi = MethodInfo(flags & 0x01 != 0, flags & 0x04 != 0)
 684             method_infos.append(mi)
 685
 686         # Metadata
 687         metadata_count = u30()
 688         for _c in range(metadata_count):
 689             u30()  # name
 690             item_count = u30()
 691             for _c2 in range(item_count):
 692                 u30()  # key
 693                 u30()  # value
 694
 695         def parse_traits_info():
 696             trait_name_idx = u30()
 697             kind_full = read_byte()
 698             kind = kind_full & 0x0f
 699             attrs = kind_full >> 4
 700             methods = {}
 701             if kind in [0x00, 0x06]:  # Slot or Const
 702                 u30()  # Slot id
 703                 u30()  # type_name_idx
 704                 vindex = u30()
 705                 if vindex != 0:
 706                     read_byte()  # vkind
 707             elif kind in [0x01, 0x02, 0x03]:  # Method / Getter / Setter
 708                 u30()  # disp_id
 709                 method_idx = u30()
 710                 methods[multinames[trait_name_idx]] = method_idx
 711             elif kind == 0x04:  # Class
 712                 u30()  # slot_id
 713                 u30()  # classi
 714             elif kind == 0x05:  # Function
 715                 u30()  # slot_id
 716                 function_idx = u30()
 717                 methods[function_idx] = multinames[trait_name_idx]
 718             else:
 719                 raise ExtractorError(u'Unsupported trait kind %d' % kind)
 720
 721             if attrs & 0x4 != 0:  # Metadata present
 722                 metadata_count = u30()
 723                 for _c3 in range(metadata_count):
 724                     u30()  # metadata index
 725
 726             return methods
 727
 728         # Classes
 729         TARGET_CLASSNAME = u'SignatureDecipher'
 730         searched_idx = multinames.index(TARGET_CLASSNAME)
 731         searched_class_id = None
 732         class_count = u30()
 733         for class_id in range(class_count):
 734             name_idx = u30()
 735             if name_idx == searched_idx:
 736                 # We found the class we're looking for!
 737                 searched_class_id = class_id
 738             u30()  # super_name idx
 739             flags = read_byte()
 740             if flags & 0x08 != 0:  # Protected namespace is present
 741                 u30()  # protected_ns_idx
 742             intrf_count = u30()
 743             for _c2 in range(intrf_count):
 744                 u30()
 745             u30()  # iinit
 746             trait_count = u30()
 747             for _c2 in range(trait_count):
 748                 parse_traits_info()
 749
 750         if searched_class_id is None:
 751             raise ExtractorError(u'Target class %r not found' %
 752                                  TARGET_CLASSNAME)
 753
 754         method_names = {}
 755         method_idxs = {}
 756         for class_id in range(class_count):
 757             u30()  # cinit
 758             trait_count = u30()
 759             for _c2 in range(trait_count):
 760                 trait_methods = parse_traits_info()
 761                 if class_id == searched_class_id:
 762                     method_names.update(trait_methods.items())
 763                     method_idxs.update(dict(
 764                         (idx, name)
 765                         for name, idx in trait_methods.items()))
 766
 767         # Scripts
 768         script_count = u30()
 769         for _c in range(script_count):
 770             u30()  # init
 771             trait_count = u30()
 772             for _c2 in range(trait_count):
 773                 parse_traits_info()
 774
 775         # Method bodies
 776         method_body_count = u30()
 777         Method = collections.namedtuple('Method', ['code', 'local_count'])
 778         methods = {}
 779         for _c in range(method_body_count):
 780             method_idx = u30()
 781             u30()  # max_stack
 782             local_count = u30()
 783             u30()  # init_scope_depth
 784             u30()  # max_scope_depth
 785             code_length = u30()
 786             code = read_bytes(code_length)
 787             if method_idx in method_idxs:
 788                 m = Method(code, local_count)
 789                 methods[method_idxs[method_idx]] = m
 790             exception_count = u30()
 791             for _c2 in range(exception_count):
 792                 u30()  # from
 793                 u30()  # to
 794                 u30()  # target
 795                 u30()  # exc_type
 796                 u30()  # var_name
 797             trait_count = u30()
 798             for _c2 in range(trait_count):
 799                 parse_traits_info()
 800
 801         assert p + code_reader.tell() == len(code_tag)
 802         assert len(methods) == len(method_idxs)
 803
 804         method_pyfunctions = {}
 805
 806         def extract_function(func_name):
 807             if func_name in method_pyfunctions:
 808                 return method_pyfunctions[func_name]
 809             if func_name not in methods:
 810                 raise ExtractorError(u'Cannot find function %r' % func_name)
 811             m = methods[func_name]
 812
 813             def resfunc(args):
 814                 registers = ['(this)'] + list(args) + [None] * m.local_count
 815                 stack = []
 816                 coder = io.BytesIO(m.code)
 817                 while True:
 818                     opcode = struct.unpack('!B', coder.read(1))[0]
 819                     if opcode == 36:  # pushbyte
 820                         v = struct.unpack('!B', coder.read(1))[0]
 821                         stack.append(v)
 822                     elif opcode == 44:  # pushstring
 823                         idx = u30(coder)
 824                         stack.append(constant_strings[idx])
 825                     elif opcode == 48:  # pushscope
 826                         # We don't implement the scope register, so we'll just
 827                         # ignore the popped value
 828                         stack.pop()
 829                     elif opcode == 70:  # callproperty
 830                         index = u30(coder)
 831                         mname = multinames[index]
 832                         arg_count = u30(coder)
 833                         args = list(reversed(
 834                             [stack.pop() for _ in range(arg_count)]))
 835                         obj = stack.pop()
 836                         if mname == u'split':
 837                             assert len(args) == 1
 838                             assert isinstance(args[0], compat_str)
 839                             assert isinstance(obj, compat_str)
 840                             if args[0] == u'':
 841                                 res = list(obj)
 842                             else:
 843                                 res = obj.split(args[0])
 844                             stack.append(res)
 845                         elif mname == u'slice':
 846                             assert len(args) == 1
 847                             assert isinstance(args[0], int)
 848                             assert isinstance(obj, list)
 849                             res = obj[args[0]:]
 850                             stack.append(res)
 851                         elif mname == u'join':
 852                             assert len(args) == 1
 853                             assert isinstance(args[0], compat_str)
 854                             assert isinstance(obj, list)
 855                             res = args[0].join(obj)
 856                             stack.append(res)
 857                         elif mname in method_pyfunctions:
 858                             stack.append(method_pyfunctions[mname](args))
 859                         else:
 860                             raise NotImplementedError(
 861                                 u'Unsupported property %r on %r'
 862                                 % (mname, obj))
 863                     elif opcode == 72:  # returnvalue
 864                         res = stack.pop()
 865                         return res
 866                     elif opcode == 79:  # callpropvoid
 867                         index = u30(coder)
 868                         mname = multinames[index]
 869                         arg_count = u30(coder)
 870                         args = list(reversed(
 871                             [stack.pop() for _ in range(arg_count)]))
 872                         obj = stack.pop()
 873                         if mname == u'reverse':
 874                             assert isinstance(obj, list)
 875                             obj.reverse()
 876                         else:
 877                             raise NotImplementedError(
 878                                 u'Unsupported (void) property %r on %r'
 879                                 % (mname, obj))
 880                     elif opcode == 93:  # findpropstrict
 881                         index = u30(coder)
 882                         mname = multinames[index]
 883                         res = extract_function(mname)
 884                         stack.append(res)
 885                     elif opcode == 97:  # setproperty
 886                         index = u30(coder)
 887                         value = stack.pop()
 888                         idx = stack.pop()
 889                         obj = stack.pop()
 890                         assert isinstance(obj, list)
 891                         assert isinstance(idx, int)
 892                         obj[idx] = value
 893                     elif opcode == 98:  # getlocal
 894                         index = u30(coder)
 895                         stack.append(registers[index])
 896                     elif opcode == 99:  # setlocal
 897                         index = u30(coder)
 898                         value = stack.pop()
 899                         registers[index] = value
 900                     elif opcode == 102:  # getproperty
 901                         index = u30(coder)
 902                         pname = multinames[index]
 903                         if pname == u'length':
 904                             obj = stack.pop()
 905                             assert isinstance(obj, list)
 906                             stack.append(len(obj))
 907                         else:  # Assume attribute access
 908                             idx = stack.pop()
 909                             assert isinstance(idx, int)
 910                             obj = stack.pop()
 911                             assert isinstance(obj, list)
 912                             stack.append(obj[idx])
 913                     elif opcode == 128:  # coerce
 914                         u30(coder)
 915                     elif opcode == 133:  # coerce_s
 916                         assert isinstance(stack[-1], (type(None), compat_str))
 917                     elif opcode == 164:  # modulo
 918                         value2 = stack.pop()
 919                         value1 = stack.pop()
 920                         res = value1 % value2
 921                         stack.append(res)
 922                     elif opcode == 208:  # getlocal_0
 923                         stack.append(registers[0])
 924                     elif opcode == 209:  # getlocal_1
 925                         stack.append(registers[1])
 926                     elif opcode == 210:  # getlocal_2
 927                         stack.append(registers[2])
 928                     elif opcode == 211:  # getlocal_3
 929                         stack.append(registers[3])
 930                     elif opcode == 214:  # setlocal_2
 931                         registers[2] = stack.pop()
 932                     elif opcode == 215:  # setlocal_3
 933                         registers[3] = stack.pop()
 934                     else:
 935                         raise NotImplementedError(
 936                             u'Unsupported opcode %d' % opcode)
 937
 938             method_pyfunctions[func_name] = resfunc
 939             return resfunc
 940
 941         initial_function = extract_function(u'decipher')
 942         return lambda s: initial_function([s])
 943
 944     def _decrypt_signature(self, s, video_id, player_url, age_gate=False):
 945         """Turn the encrypted s field into a working signature"""
 946
 947         if player_url is not None:
 948             if player_url.startswith(u'//'):
 949                 player_url = u'https:' + player_url
 950             try:
 951                 player_id = (player_url, len(s))
 952                 if player_id not in self._player_cache:
 953                     func = self._extract_signature_function(
 954                         video_id, player_url, len(s)
 955                     )
 956                     self._player_cache[player_id] = func
 957                 func = self._player_cache[player_id]
 958                 if self._downloader.params.get('youtube_print_sig_code'):
 959                     self._print_sig_code(func, len(s))
 960                 return func(s)
 961             except Exception:
 962                 tb = traceback.format_exc()
 963                 self._downloader.report_warning(
 964                     u'Automatic signature extraction failed: ' + tb)
 965
 966             self._downloader.report_warning(
 967                 u'Warning: Falling back to static signature algorithm')
 968
 969         return self._static_decrypt_signature(
 970             s, video_id, player_url, age_gate)
 971
 972     def _static_decrypt_signature(self, s, video_id, player_url, age_gate):
 973         if age_gate:
 974             # The videos with age protection use another player, so the
 975             # algorithms can be different.
 976             if len(s) == 86:
 977                 return s[2:63] + s[82] + s[64:82] + s[63]
 978
 979         if len(s) == 93:
 980             return s[86:29:-1] + s[88] + s[28:5:-1]
 981         elif len(s) == 92:
 982             return s[25] + s[3:25] + s[0] + s[26:42] + s[79] + s[43:79] + s[91] + s[80:83]
 983         elif len(s) == 91:
 984             return s[84:27:-1] + s[86] + s[26:5:-1]
 985         elif len(s) == 90:
 986             return s[25] + s[3:25] + s[2] + s[26:40] + s[77] + s[41:77] + s[89] + s[78:81]
 987         elif len(s) == 89:
 988             return s[84:78:-1] + s[87] + s[77:60:-1] + s[0] + s[59:3:-1]
 989         elif len(s) == 88:
 990             return s[7:28] + s[87] + s[29:45] + s[55] + s[46:55] + s[2] + s[56:87] + s[28]
 991         elif len(s) == 87:
 992             return s[6:27] + s[4] + s[28:39] + s[27] + s[40:59] + s[2] + s[60:]
 993         elif len(s) == 86:
 994             return s[80:72:-1] + s[16] + s[71:39:-1] + s[72] + s[38:16:-1] + s[82] + s[15::-1]
 995         elif len(s) == 85:
 996             return s[3:11] + s[0] + s[12:55] + s[84] + s[56:84]
 997         elif len(s) == 84:
 998             return s[78:70:-1] + s[14] + s[69:37:-1] + s[70] + s[36:14:-1] + s[80] + s[:14][::-1]
 999         elif len(s) == 83:
1000             return s[80:63:-1] + s[0] + s[62:0:-1] + s[63]
1001         elif len(s) == 82:
1002             return s[80:37:-1] + s[7] + s[36:7:-1] + s[0] + s[6:0:-1] + s[37]
1003         elif len(s) == 81:
1004             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]
1005         elif len(s) == 80:
1006             return s[1:19] + s[0] + s[20:68] + s[19] + s[69:80]
1007         elif len(s) == 79:
1008             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]
1009
1010         else:
1011             raise ExtractorError(u'Unable to decrypt signature, key length %d not supported; retrying might work' % (len(s)))
1012
1013     def _get_available_subtitles(self, video_id, webpage):
1014         try:
1015             sub_list = self._download_webpage(
1016                 'http://video.google.com/timedtext?hl=en&type=list&v=%s' % video_id,
1017                 video_id, note=False)
1018         except ExtractorError as err:
1019             self._downloader.report_warning(u'unable to download video subtitles: %s' % compat_str(err))
1020             return {}
1021         lang_list = re.findall(r'name="([^"]*)"[^>]+lang_code="([\w\-]+)"', sub_list)
1022
1023         sub_lang_list = {}
1024         for l in lang_list:
1025             lang = l[1]
1026             params = compat_urllib_parse.urlencode({
1027                 'lang': lang,
1028                 'v': video_id,
1029                 'fmt': self._downloader.params.get('subtitlesformat', 'srt'),
1030                 'name': unescapeHTML(l[0]).encode('utf-8'),
1031             })
1032             url = u'http://www.youtube.com/api/timedtext?' + params
1033             sub_lang_list[lang] = url
1034         if not sub_lang_list:
1035             self._downloader.report_warning(u'video doesn\'t have subtitles')
1036             return {}
1037         return sub_lang_list
1038
1039     def _get_available_automatic_caption(self, video_id, webpage):
1040         """We need the webpage for getting the captions url, pass it as an
1041            argument to speed up the process."""
1042         sub_format = self._downloader.params.get('subtitlesformat', 'srt')
1043         self.to_screen(u'%s: Looking for automatic captions' % video_id)
1044         mobj = re.search(r';ytplayer.config = ({.*?});', webpage)
1045         err_msg = u'Couldn\'t find automatic captions for %s' % video_id
1046         if mobj is None:
1047             self._downloader.report_warning(err_msg)
1048             return {}
1049         player_config = json.loads(mobj.group(1))
1050         try:
1051             args = player_config[u'args']
1052             caption_url = args[u'ttsurl']
1053             timestamp = args[u'timestamp']
1054             # We get the available subtitles
1055             list_params = compat_urllib_parse.urlencode({
1056                 'type': 'list',
1057                 'tlangs': 1,
1058                 'asrs': 1,
1059             })
1060             list_url = caption_url + '&' + list_params
1061             caption_list = self._download_xml(list_url, video_id)
1062             original_lang_node = caption_list.find('track')
1063             if original_lang_node is None or original_lang_node.attrib.get('kind') != 'asr' :
1064                 self._downloader.report_warning(u'Video doesn\'t have automatic captions')
1065                 return {}
1066             original_lang = original_lang_node.attrib['lang_code']
1067
1068             sub_lang_list = {}
1069             for lang_node in caption_list.findall('target'):
1070                 sub_lang = lang_node.attrib['lang_code']
1071                 params = compat_urllib_parse.urlencode({
1072                     'lang': original_lang,
1073                     'tlang': sub_lang,
1074                     'fmt': sub_format,
1075                     'ts': timestamp,
1076                     'kind': 'asr',
1077                 })
1078                 sub_lang_list[sub_lang] = caption_url + '&' + params
1079             return sub_lang_list
1080         # An extractor error can be raise by the download process if there are
1081         # no automatic captions but there are subtitles
1082         except (KeyError, ExtractorError):
1083             self._downloader.report_warning(err_msg)
1084             return {}
1085
1086     def _extract_id(self, url):
1087         mobj = re.match(self._VALID_URL, url, re.VERBOSE)
1088         if mobj is None:
1089             raise ExtractorError(u'Invalid URL: %s' % url)
1090         video_id = mobj.group(2)
1091         return video_id
1092
1093     def _extract_from_m3u8(self, manifest_url, video_id):
1094         url_map = {}
1095         def _get_urls(_manifest):
1096             lines = _manifest.split('\n')
1097             urls = filter(lambda l: l and not l.startswith('#'),
1098                             lines)
1099             return urls
1100         manifest = self._download_webpage(manifest_url, video_id, u'Downloading formats manifest')
1101         formats_urls = _get_urls(manifest)
1102         for format_url in formats_urls:
1103             itag = self._search_regex(r'itag/(\d+?)/', format_url, 'itag')
1104             url_map[itag] = format_url
1105         return url_map
1106
1107     def _extract_annotations(self, video_id):
1108         url = 'https://www.youtube.com/annotations_invideo?features=1&legacy=1&video_id=%s' % video_id
1109         return self._download_webpage(url, video_id, note=u'Searching for annotations.', errnote=u'Unable to download video annotations.')
1110
1111     def _real_extract(self, url):
1112         # Extract original video URL from URL with redirection, like age verification, using next_url parameter
1113         mobj = re.search(self._NEXT_URL_RE, url)
1114         if mobj:
1115             url = 'https://www.youtube.com/' + compat_urllib_parse.unquote(mobj.group(1)).lstrip('/')
1116         video_id = self._extract_id(url)
1117
1118         # Get video webpage
1119         url = 'https://www.youtube.com/watch?v=%s&gl=US&hl=en&has_verified=1' % video_id
1120         video_webpage = self._download_webpage(url, video_id)
1121
1122         # Attempt to extract SWF player URL
1123         mobj = re.search(r'swfConfig.*?"(https?:\\/\\/.*?watch.*?-.*?\.swf)"', video_webpage)
1124         if mobj is not None:
1125             player_url = re.sub(r'\\(.)', r'\1', mobj.group(1))
1126         else:
1127             player_url = None
1128
1129         # Get video info
1130         self.report_video_info_webpage_download(video_id)
1131         if re.search(r'player-age-gate-content">', video_webpage) is not None:
1132             self.report_age_confirmation()
1133             age_gate = True
1134             # We simulate the access to the video from www.youtube.com/v/{video_id}
1135             # this can be viewed without login into Youtube
1136             data = compat_urllib_parse.urlencode({'video_id': video_id,
1137                                                   'el': 'player_embedded',
1138                                                   'gl': 'US',
1139                                                   'hl': 'en',
1140                                                   'eurl': 'https://youtube.googleapis.com/v/' + video_id,
1141                                                   'asv': 3,
1142                                                   'sts':'1588',
1143                                                   })
1144             video_info_url = 'https://www.youtube.com/get_video_info?' + data
1145             video_info_webpage = self._download_webpage(video_info_url, video_id,
1146                                     note=False,
1147                                     errnote='unable to download video info webpage')
1148             video_info = compat_parse_qs(video_info_webpage)
1149         else:
1150             age_gate = False
1151             for el_type in ['&el=embedded', '&el=detailpage', '&el=vevo', '']:
1152                 video_info_url = ('https://www.youtube.com/get_video_info?&video_id=%s%s&ps=default&eurl=&gl=US&hl=en'
1153                         % (video_id, el_type))
1154                 video_info_webpage = self._download_webpage(video_info_url, video_id,
1155                                         note=False,
1156                                         errnote='unable to download video info webpage')
1157                 video_info = compat_parse_qs(video_info_webpage)
1158                 if 'token' in video_info:
1159                     break
1160         if 'token' not in video_info:
1161             if 'reason' in video_info:
1162                 raise ExtractorError(u'YouTube said: %s' % video_info['reason'][0], expected=True)
1163             else:
1164                 raise ExtractorError(u'"token" parameter not in video info for unknown reason')
1165
1166         if 'view_count' in video_info:
1167             view_count = int(video_info['view_count'][0])
1168         else:
1169             view_count = None
1170
1171         # Check for "rental" videos
1172         if 'ypc_video_rental_bar_text' in video_info and 'author' not in video_info:
1173             raise ExtractorError(u'"rental" videos not supported')
1174
1175         # Start extracting information
1176         self.report_information_extraction(video_id)
1177
1178         # uploader
1179         if 'author' not in video_info:
1180             raise ExtractorError(u'Unable to extract uploader name')
1181         video_uploader = compat_urllib_parse.unquote_plus(video_info['author'][0])
1182
1183         # uploader_id
1184         video_uploader_id = None
1185         mobj = re.search(r'<link itemprop="url" href="http://www.youtube.com/(?:user|channel)/([^"]+)">', video_webpage)
1186         if mobj is not None:
1187             video_uploader_id = mobj.group(1)
1188         else:
1189             self._downloader.report_warning(u'unable to extract uploader nickname')
1190
1191         # title
1192         if 'title' in video_info:
1193             video_title = compat_urllib_parse.unquote_plus(video_info['title'][0])
1194         else:
1195             self._downloader.report_warning(u'Unable to extract video title')
1196             video_title = u'_'
1197
1198         # thumbnail image
1199         # We try first to get a high quality image:
1200         m_thumb = re.search(r'<span itemprop="thumbnail".*?href="(.*?)">',
1201                             video_webpage, re.DOTALL)
1202         if m_thumb is not None:
1203             video_thumbnail = m_thumb.group(1)
1204         elif 'thumbnail_url' not in video_info:
1205             self._downloader.report_warning(u'unable to extract video thumbnail')
1206             video_thumbnail = None
1207         else:   # don't panic if we can't find it
1208             video_thumbnail = compat_urllib_parse.unquote_plus(video_info['thumbnail_url'][0])
1209
1210         # upload date
1211         upload_date = None
1212         mobj = re.search(r'id="eow-date.*?>(.*?)</span>', video_webpage, re.DOTALL)
1213         if mobj is not None:
1214             upload_date = ' '.join(re.sub(r'[/,-]', r' ', mobj.group(1)).split())
1215             upload_date = unified_strdate(upload_date)
1216
1217         # description
1218         video_description = get_element_by_id("eow-description", video_webpage)
1219         if video_description:
1220             video_description = re.sub(r'''(?x)
1221                 <a\s+
1222                     (?:[a-zA-Z-]+="[^"]+"\s+)*?
1223                     title="([^"]+)"\s+
1224                     (?:[a-zA-Z-]+="[^"]+"\s+)*?
1225                     class="yt-uix-redirect-link"\s*>
1226                 [^<]+
1227                 </a>
1228             ''', r'\1', video_description)
1229             video_description = clean_html(video_description)
1230         else:
1231             fd_mobj = re.search(r'<meta name="description" content="([^"]+)"', video_webpage)
1232             if fd_mobj:
1233                 video_description = unescapeHTML(fd_mobj.group(1))
1234             else:
1235                 video_description = u''
1236
1237         def _extract_count(klass):
1238             count = self._search_regex(
1239                 r'class="%s">([\d,]+)</span>' % re.escape(klass),
1240                 video_webpage, klass, default=None)
1241             if count is not None:
1242                 return int(count.replace(',', ''))
1243             return None
1244         like_count = _extract_count(u'likes-count')
1245         dislike_count = _extract_count(u'dislikes-count')
1246
1247         # subtitles
1248         video_subtitles = self.extract_subtitles(video_id, video_webpage)
1249
1250         if self._downloader.params.get('listsubtitles', False):
1251             self._list_available_subtitles(video_id, video_webpage)
1252             return
1253
1254         if 'length_seconds' not in video_info:
1255             self._downloader.report_warning(u'unable to extract video duration')
1256             video_duration = None
1257         else:
1258             video_duration = int(compat_urllib_parse.unquote_plus(video_info['length_seconds'][0]))
1259
1260         # annotations
1261         video_annotations = None
1262         if self._downloader.params.get('writeannotations', False):
1263                 video_annotations = self._extract_annotations(video_id)
1264
1265         # Decide which formats to download
1266         try:
1267             mobj = re.search(r';ytplayer.config = ({.*?});', video_webpage)
1268             if not mobj:
1269                 raise ValueError('Could not find vevo ID')
1270             info = json.loads(mobj.group(1))
1271             args = info['args']
1272             # Easy way to know if the 's' value is in url_encoded_fmt_stream_map
1273             # this signatures are encrypted
1274             if 'url_encoded_fmt_stream_map' not in args:
1275                 raise ValueError(u'No stream_map present')  # caught below
1276             re_signature = re.compile(r'[&,]s=')
1277             m_s = re_signature.search(args['url_encoded_fmt_stream_map'])
1278             if m_s is not None:
1279                 self.to_screen(u'%s: Encrypted signatures detected.' % video_id)
1280                 video_info['url_encoded_fmt_stream_map'] = [args['url_encoded_fmt_stream_map']]
1281             m_s = re_signature.search(args.get('adaptive_fmts', u''))
1282             if m_s is not None:
1283                 if 'adaptive_fmts' in video_info:
1284                     video_info['adaptive_fmts'][0] += ',' + args['adaptive_fmts']
1285                 else:
1286                     video_info['adaptive_fmts'] = [args['adaptive_fmts']]
1287         except ValueError:
1288             pass
1289
1290         def _map_to_format_list(urlmap):
1291             formats = []
1292             for itag, video_real_url in urlmap.items():
1293                 dct = {
1294                     'format_id': itag,
1295                     'url': video_real_url,
1296                     'player_url': player_url,
1297                 }
1298                 if itag in self._formats:
1299                     dct.update(self._formats[itag])
1300                 formats.append(dct)
1301             return formats
1302
1303         if 'conn' in video_info and video_info['conn'][0].startswith('rtmp'):
1304             self.report_rtmp_download()
1305             formats = [{
1306                 'format_id': '_rtmp',
1307                 'protocol': 'rtmp',
1308                 'url': video_info['conn'][0],
1309                 'player_url': player_url,
1310             }]
1311         elif len(video_info.get('url_encoded_fmt_stream_map', [])) >= 1 or len(video_info.get('adaptive_fmts', [])) >= 1:
1312             encoded_url_map = video_info.get('url_encoded_fmt_stream_map', [''])[0] + ',' + video_info.get('adaptive_fmts',[''])[0]
1313             if 'rtmpe%3Dyes' in encoded_url_map:
1314                 raise ExtractorError('rtmpe downloads are not supported, see https://github.com/rg3/youtube-dl/issues/343 for more information.', expected=True)
1315             url_map = {}
1316             for url_data_str in encoded_url_map.split(','):
1317                 url_data = compat_parse_qs(url_data_str)
1318                 if 'itag' in url_data and 'url' in url_data:
1319                     url = url_data['url'][0]
1320                     if 'sig' in url_data:
1321                         url += '&signature=' + url_data['sig'][0]
1322                     elif 's' in url_data:
1323                         encrypted_sig = url_data['s'][0]
1324                         if self._downloader.params.get('verbose'):
1325                             if age_gate:
1326                                 if player_url is None:
1327                                     player_version = 'unknown'
1328                                 else:
1329                                     player_version = self._search_regex(
1330                                         r'-(.+)\.swf$', player_url,
1331                                         u'flash player', fatal=False)
1332                                 player_desc = 'flash player %s' % player_version
1333                             else:
1334                                 player_version = self._search_regex(
1335                                     r'html5player-(.+?)\.js', video_webpage,
1336                                     'html5 player', fatal=False)
1337                                 player_desc = u'html5 player %s' % player_version
1338
1339                             parts_sizes = u'.'.join(compat_str(len(part)) for part in encrypted_sig.split('.'))
1340                             self.to_screen(u'encrypted signature length %d (%s), itag %s, %s' %
1341                                 (len(encrypted_sig), parts_sizes, url_data['itag'][0], player_desc))
1342
1343                         if not age_gate:
1344                             jsplayer_url_json = self._search_regex(
1345                                 r'"assets":.+?"js":\s*("[^"]+")',
1346                                 video_webpage, u'JS player URL')
1347                             player_url = json.loads(jsplayer_url_json)
1348
1349                         signature = self._decrypt_signature(
1350                             encrypted_sig, video_id, player_url, age_gate)
1351                         url += '&signature=' + signature
1352                     if 'ratebypass' not in url:
1353                         url += '&ratebypass=yes'
1354                     url_map[url_data['itag'][0]] = url
1355             formats = _map_to_format_list(url_map)
1356         elif video_info.get('hlsvp'):
1357             manifest_url = video_info['hlsvp'][0]
1358             url_map = self._extract_from_m3u8(manifest_url, video_id)
1359             formats = _map_to_format_list(url_map)
1360         else:
1361             raise ExtractorError(u'no conn, hlsvp or url_encoded_fmt_stream_map information found in video info')
1362
1363         # Look for the DASH manifest
1364         dash_manifest_url_lst = video_info.get('dashmpd')
1365         if (dash_manifest_url_lst and dash_manifest_url_lst[0] and
1366                 self._downloader.params.get('youtube_include_dash_manifest', False)):
1367             try:
1368                 dash_doc = self._download_xml(
1369                     dash_manifest_url_lst[0], video_id,
1370                     note=u'Downloading DASH manifest',
1371                     errnote=u'Could not download DASH manifest')
1372                 for r in dash_doc.findall(u'.//{urn:mpeg:DASH:schema:MPD:2011}Representation'):
1373                     url_el = r.find('{urn:mpeg:DASH:schema:MPD:2011}BaseURL')
1374                     if url_el is None:
1375                         continue
1376                     format_id = r.attrib['id']
1377                     video_url = url_el.text
1378                     filesize = int_or_none(url_el.attrib.get('{http://youtube.com/yt/2012/10/10}contentLength'))
1379                     f = {
1380                         'format_id': format_id,
1381                         'url': video_url,
1382                         'width': int_or_none(r.attrib.get('width')),
1383                         'tbr': int_or_none(r.attrib.get('bandwidth'), 1000),
1384                         'asr': int_or_none(r.attrib.get('audioSamplingRate')),
1385                         'filesize': filesize,
1386                     }
1387                     try:
1388                         existing_format = next(
1389                             fo for fo in formats
1390                             if fo['format_id'] == format_id)
1391                     except StopIteration:
1392                         f.update(self._formats.get(format_id, {}))
1393                         formats.append(f)
1394                     else:
1395                         existing_format.update(f)
1396
1397             except (ExtractorError, KeyError) as e:
1398                 self.report_warning(u'Skipping DASH manifest: %s' % e, video_id)
1399
1400         self._sort_formats(formats)
1401
1402         return {
1403             'id':           video_id,
1404             'uploader':     video_uploader,
1405             'uploader_id':  video_uploader_id,
1406             'upload_date':  upload_date,
1407             'title':        video_title,
1408             'thumbnail':    video_thumbnail,
1409             'description':  video_description,
1410             'subtitles':    video_subtitles,
1411             'duration':     video_duration,
1412             'age_limit':    18 if age_gate else 0,
1413             'annotations':  video_annotations,
1414             'webpage_url': 'https://www.youtube.com/watch?v=%s' % video_id,
1415             'view_count':   view_count,
1416             'like_count': like_count,
1417             'dislike_count': dislike_count,
1418             'formats':      formats,
1419         }
1420
1421 class YoutubePlaylistIE(YoutubeBaseInfoExtractor):
1422     IE_DESC = u'YouTube.com playlists'
1423     _VALID_URL = r"""(?:
1424                         (?:https?://)?
1425                         (?:\w+\.)?
1426                         youtube\.com/
1427                         (?:
1428                            (?:course|view_play_list|my_playlists|artist|playlist|watch)
1429                            \? (?:.*?&)*? (?:p|a|list)=
1430                         |  p/
1431                         )
1432                         ((?:PL|EC|UU|FL|RD)?[0-9A-Za-z-_]{10,})
1433                         .*
1434                      |
1435                         ((?:PL|EC|UU|FL|RD)[0-9A-Za-z-_]{10,})
1436                      )"""
1437     _TEMPLATE_URL = 'https://www.youtube.com/playlist?list=%s&page=%s'
1438     _MORE_PAGES_INDICATOR = r'data-link-type="next"'
1439     _VIDEO_RE = r'href="/watch\?v=(?P<id>[0-9A-Za-z_-]{11})&amp;[^"]*?index=(?P<index>\d+)'
1440     IE_NAME = u'youtube:playlist'
1441
1442     @classmethod
1443     def suitable(cls, url):
1444         """Receives a URL and returns True if suitable for this IE."""
1445         return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
1446
1447     def _real_initialize(self):
1448         self._login()
1449
1450     def _ids_to_results(self, ids):
1451         return [self.url_result(vid_id, 'Youtube', video_id=vid_id)
1452                        for vid_id in ids]
1453
1454     def _extract_mix(self, playlist_id):
1455         # The mixes are generated from a a single video
1456         # the id of the playlist is just 'RD' + video_id
1457         url = 'https://youtube.com/watch?v=%s&list=%s' % (playlist_id[-11:], playlist_id)
1458         webpage = self._download_webpage(url, playlist_id, u'Downloading Youtube mix')
1459         title_span = (get_element_by_attribute('class', 'title long-title', webpage) or
1460             get_element_by_attribute('class', 'title ', webpage))
1461         title = clean_html(title_span)
1462         video_re = r'data-index="\d+".*?href="/watch\?v=([0-9A-Za-z_-]{11})&amp;[^"]*?list=%s' % re.escape(playlist_id)
1463         ids = orderedSet(re.findall(video_re, webpage))
1464         url_results = self._ids_to_results(ids)
1465
1466         return self.playlist_result(url_results, playlist_id, title)
1467
1468     def _real_extract(self, url):
1469         # Extract playlist id
1470         mobj = re.match(self._VALID_URL, url, re.VERBOSE)
1471         if mobj is None:
1472             raise ExtractorError(u'Invalid URL: %s' % url)
1473         playlist_id = mobj.group(1) or mobj.group(2)
1474
1475         # Check if it's a video-specific URL
1476         query_dict = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
1477         if 'v' in query_dict:
1478             video_id = query_dict['v'][0]
1479             if self._downloader.params.get('noplaylist'):
1480                 self.to_screen(u'Downloading just video %s because of --no-playlist' % video_id)
1481                 return self.url_result(video_id, 'Youtube', video_id=video_id)
1482             else:
1483                 self.to_screen(u'Downloading playlist PL%s - add --no-playlist to just download video %s' % (playlist_id, video_id))
1484
1485         if playlist_id.startswith('RD'):
1486             # Mixes require a custom extraction process
1487             return self._extract_mix(playlist_id)
1488         if playlist_id.startswith('TL'):
1489             raise ExtractorError(u'For downloading YouTube.com top lists, use '
1490                 u'the "yttoplist" keyword, for example "youtube-dl \'yttoplist:music:Top Tracks\'"', expected=True)
1491
1492         # Extract the video ids from the playlist pages
1493         ids = []
1494
1495         for page_num in itertools.count(1):
1496             url = self._TEMPLATE_URL % (playlist_id, page_num)
1497             page = self._download_webpage(url, playlist_id, u'Downloading page #%s' % page_num)
1498             matches = re.finditer(self._VIDEO_RE, page)
1499             # We remove the duplicates and the link with index 0
1500             # (it's not the first video of the playlist)
1501             new_ids = orderedSet(m.group('id') for m in matches if m.group('index') != '0')
1502             ids.extend(new_ids)
1503
1504             if re.search(self._MORE_PAGES_INDICATOR, page) is None:
1505                 break
1506
1507         try:
1508             playlist_title = self._og_search_title(page)
1509         except RegexNotFoundError:
1510             self.report_warning(
1511                 u'Playlist page is missing OpenGraph title, falling back ...',
1512                 playlist_id)
1513             playlist_title = self._html_search_regex(
1514                 r'<h1 class="pl-header-title">(.*?)</h1>', page, u'title')
1515
1516         url_results = self._ids_to_results(ids)
1517         return self.playlist_result(url_results, playlist_id, playlist_title)
1518
1519
1520 class YoutubeTopListIE(YoutubePlaylistIE):
1521     IE_NAME = u'youtube:toplist'
1522     IE_DESC = (u'YouTube.com top lists, "yttoplist:{channel}:{list title}"'
1523         u' (Example: "yttoplist:music:Top Tracks")')
1524     _VALID_URL = r'yttoplist:(?P<chann>.*?):(?P<title>.*?)$'
1525
1526     def _real_extract(self, url):
1527         mobj = re.match(self._VALID_URL, url)
1528         channel = mobj.group('chann')
1529         title = mobj.group('title')
1530         query = compat_urllib_parse.urlencode({'title': title})
1531         playlist_re = 'href="([^"]+?%s[^"]+?)"' % re.escape(query)
1532         channel_page = self._download_webpage('https://www.youtube.com/%s' % channel, title)
1533         link = self._html_search_regex(playlist_re, channel_page, u'list')
1534         url = compat_urlparse.urljoin('https://www.youtube.com/', link)
1535
1536         video_re = r'data-index="\d+".*?data-video-id="([0-9A-Za-z_-]{11})"'
1537         ids = []
1538         # sometimes the webpage doesn't contain the videos
1539         # retry until we get them
1540         for i in itertools.count(0):
1541             msg = u'Downloading Youtube mix'
1542             if i > 0:
1543                 msg += ', retry #%d' % i
1544             webpage = self._download_webpage(url, title, msg)
1545             ids = orderedSet(re.findall(video_re, webpage))
1546             if ids:
1547                 break
1548         url_results = self._ids_to_results(ids)
1549         return self.playlist_result(url_results, playlist_title=title)
1550
1551
1552 class YoutubeChannelIE(InfoExtractor):
1553     IE_DESC = u'YouTube.com channels'
1554     _VALID_URL = r"^(?:https?://)?(?:youtu\.be|(?:\w+\.)?youtube(?:-nocookie)?\.com)/channel/([0-9A-Za-z_-]+)"
1555     _MORE_PAGES_INDICATOR = 'yt-uix-load-more'
1556     _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'
1557     IE_NAME = u'youtube:channel'
1558
1559     def extract_videos_from_page(self, page):
1560         ids_in_page = []
1561         for mobj in re.finditer(r'href="/watch\?v=([0-9A-Za-z_-]+)&?', page):
1562             if mobj.group(1) not in ids_in_page:
1563                 ids_in_page.append(mobj.group(1))
1564         return ids_in_page
1565
1566     def _real_extract(self, url):
1567         # Extract channel id
1568         mobj = re.match(self._VALID_URL, url)
1569         if mobj is None:
1570             raise ExtractorError(u'Invalid URL: %s' % url)
1571
1572         # Download channel page
1573         channel_id = mobj.group(1)
1574         video_ids = []
1575         url = 'https://www.youtube.com/channel/%s/videos' % channel_id
1576         channel_page = self._download_webpage(url, channel_id)
1577         autogenerated = re.search(r'''(?x)
1578                 class="[^"]*?(?:
1579                     channel-header-autogenerated-label|
1580                     yt-channel-title-autogenerated
1581                 )[^"]*"''', channel_page) is not None
1582
1583         if autogenerated:
1584             # The videos are contained in a single page
1585             # the ajax pages can't be used, they are empty
1586             video_ids = self.extract_videos_from_page(channel_page)
1587         else:
1588             # Download all channel pages using the json-based channel_ajax query
1589             for pagenum in itertools.count(1):
1590                 url = self._MORE_PAGES_URL % (pagenum, channel_id)
1591                 page = self._download_webpage(url, channel_id,
1592                                               u'Downloading page #%s' % pagenum)
1593
1594                 page = json.loads(page)
1595
1596                 ids_in_page = self.extract_videos_from_page(page['content_html'])
1597                 video_ids.extend(ids_in_page)
1598
1599                 if self._MORE_PAGES_INDICATOR not in page['load_more_widget_html']:
1600                     break
1601
1602         self._downloader.to_screen(u'[youtube] Channel %s: Found %i videos' % (channel_id, len(video_ids)))
1603
1604         url_entries = [self.url_result(video_id, 'Youtube', video_id=video_id)
1605                        for video_id in video_ids]
1606         return self.playlist_result(url_entries, channel_id)
1607
1608
1609 class YoutubeUserIE(InfoExtractor):
1610     IE_DESC = u'YouTube.com user videos (URL or "ytuser" keyword)'
1611     _VALID_URL = r'(?:(?:(?:https?://)?(?:\w+\.)?youtube\.com/(?:user/)?(?!(?:attribution_link|watch)(?:$|[^a-z_A-Z0-9-])))|ytuser:)(?!feed/)([A-Za-z0-9_-]+)'
1612     _TEMPLATE_URL = 'http://gdata.youtube.com/feeds/api/users/%s'
1613     _GDATA_PAGE_SIZE = 50
1614     _GDATA_URL = 'http://gdata.youtube.com/feeds/api/users/%s/uploads?max-results=%d&start-index=%d&alt=json'
1615     IE_NAME = u'youtube:user'
1616
1617     @classmethod
1618     def suitable(cls, url):
1619         # Don't return True if the url can be extracted with other youtube
1620         # extractor, the regex would is too permissive and it would match.
1621         other_ies = iter(klass for (name, klass) in globals().items() if name.endswith('IE') and klass is not cls)
1622         if any(ie.suitable(url) for ie in other_ies): return False
1623         else: return super(YoutubeUserIE, cls).suitable(url)
1624
1625     def _real_extract(self, url):
1626         # Extract username
1627         mobj = re.match(self._VALID_URL, url)
1628         if mobj is None:
1629             raise ExtractorError(u'Invalid URL: %s' % url)
1630
1631         username = mobj.group(1)
1632
1633         # Download video ids using YouTube Data API. Result size per
1634         # query is limited (currently to 50 videos) so we need to query
1635         # page by page until there are no video ids - it means we got
1636         # all of them.
1637
1638         def download_page(pagenum):
1639             start_index = pagenum * self._GDATA_PAGE_SIZE + 1
1640
1641             gdata_url = self._GDATA_URL % (username, self._GDATA_PAGE_SIZE, start_index)
1642             page = self._download_webpage(
1643                 gdata_url, username,
1644                 u'Downloading video ids from %d to %d' % (
1645                     start_index, start_index + self._GDATA_PAGE_SIZE))
1646
1647             try:
1648                 response = json.loads(page)
1649             except ValueError as err:
1650                 raise ExtractorError(u'Invalid JSON in API response: ' + compat_str(err))
1651             if 'entry' not in response['feed']:
1652                 return
1653
1654             # Extract video identifiers
1655             entries = response['feed']['entry']
1656             for entry in entries:
1657                 title = entry['title']['$t']
1658                 video_id = entry['id']['$t'].split('/')[-1]
1659                 yield {
1660                     '_type': 'url',
1661                     'url': video_id,
1662                     'ie_key': 'Youtube',
1663                     'id': 'video_id',
1664                     'title': title,
1665                 }
1666         url_results = PagedList(download_page, self._GDATA_PAGE_SIZE)
1667
1668         return self.playlist_result(url_results, playlist_title=username)
1669
1670
1671 class YoutubeSearchIE(SearchInfoExtractor):
1672     IE_DESC = u'YouTube.com searches'
1673     _API_URL = 'https://gdata.youtube.com/feeds/api/videos?q=%s&start-index=%i&max-results=50&v=2&alt=jsonc'
1674     _MAX_RESULTS = 1000
1675     IE_NAME = u'youtube:search'
1676     _SEARCH_KEY = 'ytsearch'
1677
1678     def _get_n_results(self, query, n):
1679         """Get a specified number of results for a query"""
1680
1681         video_ids = []
1682         pagenum = 0
1683         limit = n
1684
1685         while (50 * pagenum) < limit:
1686             result_url = self._API_URL % (compat_urllib_parse.quote_plus(query), (50*pagenum)+1)
1687             data_json = self._download_webpage(
1688                 result_url, video_id=u'query "%s"' % query,
1689                 note=u'Downloading page %s' % (pagenum + 1),
1690                 errnote=u'Unable to download API page')
1691             data = json.loads(data_json)
1692             api_response = data['data']
1693
1694             if 'items' not in api_response:
1695                 raise ExtractorError(u'[youtube] No video results')
1696
1697             new_ids = list(video['id'] for video in api_response['items'])
1698             video_ids += new_ids
1699
1700             limit = min(n, api_response['totalItems'])
1701             pagenum += 1
1702
1703         if len(video_ids) > n:
1704             video_ids = video_ids[:n]
1705         videos = [self.url_result(video_id, 'Youtube', video_id=video_id)
1706                   for video_id in video_ids]
1707         return self.playlist_result(videos, query)
1708
1709 class YoutubeSearchDateIE(YoutubeSearchIE):
1710     IE_NAME = YoutubeSearchIE.IE_NAME + ':date'
1711     _API_URL = 'https://gdata.youtube.com/feeds/api/videos?q=%s&start-index=%i&max-results=50&v=2&alt=jsonc&orderby=published'
1712     _SEARCH_KEY = 'ytsearchdate'
1713     IE_DESC = u'YouTube.com searches, newest videos first'
1714
1715 class YoutubeShowIE(InfoExtractor):
1716     IE_DESC = u'YouTube.com (multi-season) shows'
1717     _VALID_URL = r'https?://www\.youtube\.com/show/(.*)'
1718     IE_NAME = u'youtube:show'
1719
1720     def _real_extract(self, url):
1721         mobj = re.match(self._VALID_URL, url)
1722         show_name = mobj.group(1)
1723         webpage = self._download_webpage(url, show_name, u'Downloading show webpage')
1724         # There's one playlist for each season of the show
1725         m_seasons = list(re.finditer(r'href="(/playlist\?list=.*?)"', webpage))
1726         self.to_screen(u'%s: Found %s seasons' % (show_name, len(m_seasons)))
1727         return [self.url_result('https://www.youtube.com' + season.group(1), 'YoutubePlaylist') for season in m_seasons]
1728
1729
1730 class YoutubeFeedsInfoExtractor(YoutubeBaseInfoExtractor):
1731     """
1732     Base class for extractors that fetch info from
1733     http://www.youtube.com/feed_ajax
1734     Subclasses must define the _FEED_NAME and _PLAYLIST_TITLE properties.
1735     """
1736     _LOGIN_REQUIRED = True
1737     # use action_load_personal_feed instead of action_load_system_feed
1738     _PERSONAL_FEED = False
1739
1740     @property
1741     def _FEED_TEMPLATE(self):
1742         action = 'action_load_system_feed'
1743         if self._PERSONAL_FEED:
1744             action = 'action_load_personal_feed'
1745         return 'http://www.youtube.com/feed_ajax?%s=1&feed_name=%s&paging=%%s' % (action, self._FEED_NAME)
1746
1747     @property
1748     def IE_NAME(self):
1749         return u'youtube:%s' % self._FEED_NAME
1750
1751     def _real_initialize(self):
1752         self._login()
1753
1754     def _real_extract(self, url):
1755         feed_entries = []
1756         paging = 0
1757         for i in itertools.count(1):
1758             info = self._download_webpage(self._FEED_TEMPLATE % paging,
1759                                           u'%s feed' % self._FEED_NAME,
1760                                           u'Downloading page %s' % i)
1761             info = json.loads(info)
1762             feed_html = info['feed_html']
1763             m_ids = re.finditer(r'"/watch\?v=(.*?)["&]', feed_html)
1764             ids = orderedSet(m.group(1) for m in m_ids)
1765             feed_entries.extend(
1766                 self.url_result(video_id, 'Youtube', video_id=video_id)
1767                 for video_id in ids)
1768             if info['paging'] is None:
1769                 break
1770             paging = info['paging']
1771         return self.playlist_result(feed_entries, playlist_title=self._PLAYLIST_TITLE)
1772
1773 class YoutubeSubscriptionsIE(YoutubeFeedsInfoExtractor):
1774     IE_DESC = u'YouTube.com subscriptions feed, "ytsubs" keyword(requires authentication)'
1775     _VALID_URL = r'https?://www\.youtube\.com/feed/subscriptions|:ytsubs(?:criptions)?'
1776     _FEED_NAME = 'subscriptions'
1777     _PLAYLIST_TITLE = u'Youtube Subscriptions'
1778
1779 class YoutubeRecommendedIE(YoutubeFeedsInfoExtractor):
1780     IE_DESC = u'YouTube.com recommended videos, "ytrec" keyword (requires authentication)'
1781     _VALID_URL = r'https?://www\.youtube\.com/feed/recommended|:ytrec(?:ommended)?'
1782     _FEED_NAME = 'recommended'
1783     _PLAYLIST_TITLE = u'Youtube Recommended videos'
1784
1785 class YoutubeWatchLaterIE(YoutubeFeedsInfoExtractor):
1786     IE_DESC = u'Youtube watch later list, "ytwatchlater" keyword (requires authentication)'
1787     _VALID_URL = r'https?://www\.youtube\.com/feed/watch_later|:ytwatchlater'
1788     _FEED_NAME = 'watch_later'
1789     _PLAYLIST_TITLE = u'Youtube Watch Later'
1790     _PERSONAL_FEED = True
1791
1792 class YoutubeHistoryIE(YoutubeFeedsInfoExtractor):
1793     IE_DESC = u'Youtube watch history, "ythistory" keyword (requires authentication)'
1794     _VALID_URL = u'https?://www\.youtube\.com/feed/history|:ythistory'
1795     _FEED_NAME = 'history'
1796     _PERSONAL_FEED = True
1797     _PLAYLIST_TITLE = u'Youtube Watch History'
1798
1799 class YoutubeFavouritesIE(YoutubeBaseInfoExtractor):
1800     IE_NAME = u'youtube:favorites'
1801     IE_DESC = u'YouTube.com favourite videos, "ytfav" keyword (requires authentication)'
1802     _VALID_URL = r'https?://www\.youtube\.com/my_favorites|:ytfav(?:ou?rites)?'
1803     _LOGIN_REQUIRED = True
1804
1805     def _real_extract(self, url):
1806         webpage = self._download_webpage('https://www.youtube.com/my_favorites', 'Youtube Favourites videos')
1807         playlist_id = self._search_regex(r'list=(.+?)["&]', webpage, u'favourites playlist id')
1808         return self.url_result(playlist_id, 'YoutubePlaylist')
1809
1810
1811 class YoutubeTruncatedURLIE(InfoExtractor):
1812     IE_NAME = 'youtube:truncated_url'
1813     IE_DESC = False  # Do not list
1814     _VALID_URL = r'''(?x)
1815         (?:https?://)?[^/]+/watch\?feature=[a-z_]+$|
1816         (?:https?://)?(?:www\.)?youtube\.com/attribution_link\?a=[^&]+$
1817     '''
1818
1819     def _real_extract(self, url):
1820         raise ExtractorError(
1821             u'Did you forget to quote the URL? Remember that & is a meta '
1822             u'character in most shells, so you want to put the URL in quotes, '
1823             u'like  youtube-dl '
1824             u'"http://www.youtube.com/watch?feature=foo&v=BaW_jenozKc" '
1825             u' or simply  youtube-dl BaW_jenozKc  .',
1826             expected=True)