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