Raphaël G. Git Repositories - youtubedl/blob - youtube_dl/extractor/youtube.py

   1 # coding: utf-8
   2
   3 import json
   4 import netrc
   5 import re
   6 import socket
   7
   8 from .common import InfoExtractor, SearchInfoExtractor
   9 from ..utils import (
  10     compat_http_client,
  11     compat_parse_qs,
  12     compat_urllib_error,
  13     compat_urllib_parse,
  14     compat_urllib_request,
  15     compat_str,
  16
  17     clean_html,
  18     get_element_by_id,
  19     ExtractorError,
  20     unescapeHTML,
  21     unified_strdate,
  22 )
  23
  24
  25 class YoutubeIE(InfoExtractor):
  26     """Information extractor for youtube.com."""
  27
  28     _VALID_URL = r"""^
  29                      (
  30                          (?:https?://)?                                       # http(s):// (optional)
  31                          (?:youtu\.be/|(?:\w+\.)?youtube(?:-nocookie)?\.com/|
  32                             tube\.majestyc\.net/)                             # the various hostnames, with wildcard subdomains
  33                          (?:.*?\#/)?                                          # handle anchor (#/) redirect urls
  34                          (?:                                                  # the various things that can precede the ID:
  35                              (?:(?:v|embed|e)/)                               # v/ or embed/ or e/
  36                              |(?:                                             # or the v= param in all its forms
  37                                  (?:watch(?:_popup)?(?:\.php)?)?              # preceding watch(_popup|.php) or nothing (like /?v=xxxx)
  38                                  (?:\?|\#!?)                                  # the params delimiter ? or # or #!
  39                                  (?:.*?&)?                                    # any other preceding param (like /?s=tuff&v=xxxx)
  40                                  v=
  41                              )
  42                          )?                                                   # optional -> youtube.com/xxxx is OK
  43                      )?                                                       # all until now is optional -> you can pass the naked ID
  44                      ([0-9A-Za-z_-]+)                                         # here is it! the YouTube video ID
  45                      (?(1).+)?                                                # if we found the ID, everything can follow
  46                      $"""
  47     _LANG_URL = r'https://www.youtube.com/?hl=en&persist_hl=1&gl=US&persist_gl=1&opt_out_ackd=1'
  48     _LOGIN_URL = 'https://accounts.google.com/ServiceLogin'
  49     _AGE_URL = 'http://www.youtube.com/verify_age?next_url=/&gl=US&hl=en'
  50     _NEXT_URL_RE = r'[\?&]next_url=([^&]+)'
  51     _NETRC_MACHINE = 'youtube'
  52     # Listed in order of quality
  53     _available_formats = ['38', '37', '46', '22', '45', '35', '44', '34', '18', '43', '6', '5', '17', '13']
  54     _available_formats_prefer_free = ['38', '46', '37', '45', '22', '44', '35', '43', '34', '18', '6', '5', '17', '13']
  55     _video_extensions = {
  56         '13': '3gp',
  57         '17': 'mp4',
  58         '18': 'mp4',
  59         '22': 'mp4',
  60         '37': 'mp4',
  61         '38': 'mp4',
  62         '43': 'webm',
  63         '44': 'webm',
  64         '45': 'webm',
  65         '46': 'webm',
  66     }
  67     _video_dimensions = {
  68         '5': '240x400',
  69         '6': '???',
  70         '13': '???',
  71         '17': '144x176',
  72         '18': '360x640',
  73         '22': '720x1280',
  74         '34': '360x640',
  75         '35': '480x854',
  76         '37': '1080x1920',
  77         '38': '3072x4096',
  78         '43': '360x640',
  79         '44': '480x854',
  80         '45': '720x1280',
  81         '46': '1080x1920',
  82     }
  83     IE_NAME = u'youtube'
  84
  85     @classmethod
  86     def suitable(cls, url):
  87         """Receives a URL and returns True if suitable for this IE."""
  88         if YoutubePlaylistIE.suitable(url): return False
  89         return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
  90
  91     def report_lang(self):
  92         """Report attempt to set language."""
  93         self.to_screen(u'Setting language')
  94
  95     def report_login(self):
  96         """Report attempt to log in."""
  97         self.to_screen(u'Logging in')
  98
  99     def report_video_webpage_download(self, video_id):
 100         """Report attempt to download video webpage."""
 101         self.to_screen(u'%s: Downloading video webpage' % video_id)
 102
 103     def report_video_info_webpage_download(self, video_id):
 104         """Report attempt to download video info webpage."""
 105         self.to_screen(u'%s: Downloading video info webpage' % video_id)
 106
 107     def report_video_subtitles_download(self, video_id):
 108         """Report attempt to download video info webpage."""
 109         self.to_screen(u'%s: Checking available subtitles' % video_id)
 110
 111     def report_video_subtitles_request(self, video_id, sub_lang, format):
 112         """Report attempt to download video info webpage."""
 113         self.to_screen(u'%s: Downloading video subtitles for %s.%s' % (video_id, sub_lang, format))
 114
 115     def report_video_subtitles_available(self, video_id, sub_lang_list):
 116         """Report available subtitles."""
 117         sub_lang = ",".join(list(sub_lang_list.keys()))
 118         self.to_screen(u'%s: Available subtitles for video: %s' % (video_id, sub_lang))
 119
 120     def report_information_extraction(self, video_id):
 121         """Report attempt to extract video information."""
 122         self.to_screen(u'%s: Extracting video information' % video_id)
 123
 124     def report_unavailable_format(self, video_id, format):
 125         """Report extracted video URL."""
 126         self.to_screen(u'%s: Format %s not available' % (video_id, format))
 127
 128     def report_rtmp_download(self):
 129         """Indicate the download will use the RTMP protocol."""
 130         self.to_screen(u'RTMP download detected')
 131
 132     def _decrypt_signature(self, s):
 133         """Decrypt the key the two subkeys must have a length of 43"""
 134
 135         if len(s) == 88:
 136             return s[48] + s[81:67:-1] + s[82] + s[66:62:-1] + s[85] + s[61:48:-1] + s[67] + s[47:12:-1] + s[3] + s[11:3:-1] + s[2] + s[12]
 137         elif len(s) == 87:
 138             return s[62] + s[82:62:-1] + s[83] + s[61:52:-1] + s[0] + s[51:2:-1]
 139         elif len(s) == 86:
 140             return s[2:63] + s[82] + s[64:82] + s[63]
 141         elif len(s) == 85:
 142             return s[76] + s[82:76:-1] + s[83] + s[75:60:-1] + s[0] + s[59:50:-1] + s[1] + s[49:2:-1]
 143         elif len(s) == 84:
 144             return s[83:36:-1] + s[2] + s[35:26:-1] + s[3] + s[25:3:-1] + s[26]
 145         elif len(s) == 83:
 146             return s[52] + s[81:55:-1] + s[2] + s[54:52:-1] + s[82] + s[51:36:-1] + s[55] + s[35:2:-1] + s[36]
 147         elif len(s) == 82:
 148             return s[36] + s[79:67:-1] + s[81] + s[66:40:-1] + s[33] + s[39:36:-1] + s[40] + s[35] + s[0] + s[67] + s[32:0:-1] + s[34]
 149
 150         else:
 151             raise ExtractorError(u'Unable to decrypt signature, subkeys length %d not supported; retrying might work' % (len(s)))
 152
 153     def _get_available_subtitles(self, video_id):
 154         self.report_video_subtitles_download(video_id)
 155         request = compat_urllib_request.Request('http://video.google.com/timedtext?hl=en&type=list&v=%s' % video_id)
 156         try:
 157             sub_list = compat_urllib_request.urlopen(request).read().decode('utf-8')
 158         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 159             return (u'unable to download video subtitles: %s' % compat_str(err), None)
 160         sub_lang_list = re.findall(r'name="([^"]*)"[^>]+lang_code="([\w\-]+)"', sub_list)
 161         sub_lang_list = dict((l[1], l[0]) for l in sub_lang_list)
 162         if not sub_lang_list:
 163             return (u'video doesn\'t have subtitles', None)
 164         return sub_lang_list
 165
 166     def _list_available_subtitles(self, video_id):
 167         sub_lang_list = self._get_available_subtitles(video_id)
 168         self.report_video_subtitles_available(video_id, sub_lang_list)
 169
 170     def _request_subtitle(self, sub_lang, sub_name, video_id, format):
 171         """
 172         Return tuple:
 173         (error_message, sub_lang, sub)
 174         """
 175         self.report_video_subtitles_request(video_id, sub_lang, format)
 176         params = compat_urllib_parse.urlencode({
 177             'lang': sub_lang,
 178             'name': sub_name,
 179             'v': video_id,
 180             'fmt': format,
 181         })
 182         url = 'http://www.youtube.com/api/timedtext?' + params
 183         try:
 184             sub = compat_urllib_request.urlopen(url).read().decode('utf-8')
 185         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 186             return (u'unable to download video subtitles: %s' % compat_str(err), None, None)
 187         if not sub:
 188             return (u'Did not fetch video subtitles', None, None)
 189         return (None, sub_lang, sub)
 190
 191     def _request_automatic_caption(self, video_id, webpage):
 192         """We need the webpage for getting the captions url, pass it as an
 193            argument to speed up the process."""
 194         sub_lang = self._downloader.params.get('subtitleslang') or 'en'
 195         sub_format = self._downloader.params.get('subtitlesformat')
 196         self.to_screen(u'%s: Looking for automatic captions' % video_id)
 197         mobj = re.search(r';ytplayer.config = ({.*?});', webpage)
 198         err_msg = u'Couldn\'t find automatic captions for "%s"' % sub_lang
 199         if mobj is None:
 200             return [(err_msg, None, None)]
 201         player_config = json.loads(mobj.group(1))
 202         try:
 203             args = player_config[u'args']
 204             caption_url = args[u'ttsurl']
 205             timestamp = args[u'timestamp']
 206             params = compat_urllib_parse.urlencode({
 207                 'lang': 'en',
 208                 'tlang': sub_lang,
 209                 'fmt': sub_format,
 210                 'ts': timestamp,
 211                 'kind': 'asr',
 212             })
 213             subtitles_url = caption_url + '&' + params
 214             sub = self._download_webpage(subtitles_url, video_id, u'Downloading automatic captions')
 215             return [(None, sub_lang, sub)]
 216         except KeyError:
 217             return [(err_msg, None, None)]
 218
 219     def _extract_subtitle(self, video_id):
 220         """
 221         Return a list with a tuple:
 222         [(error_message, sub_lang, sub)]
 223         """
 224         sub_lang_list = self._get_available_subtitles(video_id)
 225         sub_format = self._downloader.params.get('subtitlesformat')
 226         if  isinstance(sub_lang_list,tuple): #There was some error, it didn't get the available subtitles
 227             return [(sub_lang_list[0], None, None)]
 228         if self._downloader.params.get('subtitleslang', False):
 229             sub_lang = self._downloader.params.get('subtitleslang')
 230         elif 'en' in sub_lang_list:
 231             sub_lang = 'en'
 232         else:
 233             sub_lang = list(sub_lang_list.keys())[0]
 234         if not sub_lang in sub_lang_list:
 235             return [(u'no closed captions found in the specified language "%s"' % sub_lang, None, None)]
 236
 237         subtitle = self._request_subtitle(sub_lang, sub_lang_list[sub_lang].encode('utf-8'), video_id, sub_format)
 238         return [subtitle]
 239
 240     def _extract_all_subtitles(self, video_id):
 241         sub_lang_list = self._get_available_subtitles(video_id)
 242         sub_format = self._downloader.params.get('subtitlesformat')
 243         if  isinstance(sub_lang_list,tuple): #There was some error, it didn't get the available subtitles
 244             return [(sub_lang_list[0], None, None)]
 245         subtitles = []
 246         for sub_lang in sub_lang_list:
 247             subtitle = self._request_subtitle(sub_lang, sub_lang_list[sub_lang].encode('utf-8'), video_id, sub_format)
 248             subtitles.append(subtitle)
 249         return subtitles
 250
 251     def _print_formats(self, formats):
 252         print('Available formats:')
 253         for x in formats:
 254             print('%s\t:\t%s\t[%s]' %(x, self._video_extensions.get(x, 'flv'), self._video_dimensions.get(x, '???')))
 255
 256     def _real_initialize(self):
 257         if self._downloader is None:
 258             return
 259
 260         username = None
 261         password = None
 262         downloader_params = self._downloader.params
 263
 264         # Attempt to use provided username and password or .netrc data
 265         if downloader_params.get('username', None) is not None:
 266             username = downloader_params['username']
 267             password = downloader_params['password']
 268         elif downloader_params.get('usenetrc', False):
 269             try:
 270                 info = netrc.netrc().authenticators(self._NETRC_MACHINE)
 271                 if info is not None:
 272                     username = info[0]
 273                     password = info[2]
 274                 else:
 275                     raise netrc.NetrcParseError('No authenticators for %s' % self._NETRC_MACHINE)
 276             except (IOError, netrc.NetrcParseError) as err:
 277                 self._downloader.report_warning(u'parsing .netrc: %s' % compat_str(err))
 278                 return
 279
 280         # Set language
 281         request = compat_urllib_request.Request(self._LANG_URL)
 282         try:
 283             self.report_lang()
 284             compat_urllib_request.urlopen(request).read()
 285         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 286             self._downloader.report_warning(u'unable to set language: %s' % compat_str(err))
 287             return
 288
 289         # No authentication to be performed
 290         if username is None:
 291             return
 292
 293         request = compat_urllib_request.Request(self._LOGIN_URL)
 294         try:
 295             login_page = compat_urllib_request.urlopen(request).read().decode('utf-8')
 296         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 297             self._downloader.report_warning(u'unable to fetch login page: %s' % compat_str(err))
 298             return
 299
 300         galx = None
 301         dsh = None
 302         match = re.search(re.compile(r'<input.+?name="GALX".+?value="(.+?)"', re.DOTALL), login_page)
 303         if match:
 304           galx = match.group(1)
 305
 306         match = re.search(re.compile(r'<input.+?name="dsh".+?value="(.+?)"', re.DOTALL), login_page)
 307         if match:
 308           dsh = match.group(1)
 309
 310         # Log in
 311         login_form_strs = {
 312                 u'continue': u'https://www.youtube.com/signin?action_handle_signin=true&feature=sign_in_button&hl=en_US&nomobiletemp=1',
 313                 u'Email': username,
 314                 u'GALX': galx,
 315                 u'Passwd': password,
 316                 u'PersistentCookie': u'yes',
 317                 u'_utf8': u'霱',
 318                 u'bgresponse': u'js_disabled',
 319                 u'checkConnection': u'',
 320                 u'checkedDomains': u'youtube',
 321                 u'dnConn': u'',
 322                 u'dsh': dsh,
 323                 u'pstMsg': u'0',
 324                 u'rmShown': u'1',
 325                 u'secTok': u'',
 326                 u'signIn': u'Sign in',
 327                 u'timeStmp': u'',
 328                 u'service': u'youtube',
 329                 u'uilel': u'3',
 330                 u'hl': u'en_US',
 331         }
 332         # Convert to UTF-8 *before* urlencode because Python 2.x's urlencode
 333         # chokes on unicode
 334         login_form = dict((k.encode('utf-8'), v.encode('utf-8')) for k,v in login_form_strs.items())
 335         login_data = compat_urllib_parse.urlencode(login_form).encode('ascii')
 336         request = compat_urllib_request.Request(self._LOGIN_URL, login_data)
 337         try:
 338             self.report_login()
 339             login_results = compat_urllib_request.urlopen(request).read().decode('utf-8')
 340             if re.search(r'(?i)<form[^>]* id="gaia_loginform"', login_results) is not None:
 341                 self._downloader.report_warning(u'unable to log in: bad username or password')
 342                 return
 343         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 344             self._downloader.report_warning(u'unable to log in: %s' % compat_str(err))
 345             return
 346
 347         # Confirm age
 348         age_form = {
 349                 'next_url':     '/',
 350                 'action_confirm':   'Confirm',
 351                 }
 352         request = compat_urllib_request.Request(self._AGE_URL, compat_urllib_parse.urlencode(age_form))
 353         try:
 354             self.report_age_confirmation()
 355             compat_urllib_request.urlopen(request).read().decode('utf-8')
 356         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 357             raise ExtractorError(u'Unable to confirm age: %s' % compat_str(err))
 358
 359     def _extract_id(self, url):
 360         mobj = re.match(self._VALID_URL, url, re.VERBOSE)
 361         if mobj is None:
 362             raise ExtractorError(u'Invalid URL: %s' % url)
 363         video_id = mobj.group(2)
 364         return video_id
 365
 366     def _real_extract(self, url):
 367         # Extract original video URL from URL with redirection, like age verification, using next_url parameter
 368         mobj = re.search(self._NEXT_URL_RE, url)
 369         if mobj:
 370             url = 'https://www.youtube.com/' + compat_urllib_parse.unquote(mobj.group(1)).lstrip('/')
 371         video_id = self._extract_id(url)
 372
 373         # Get video webpage
 374         self.report_video_webpage_download(video_id)
 375         url = 'https://www.youtube.com/watch?v=%s&gl=US&hl=en&has_verified=1' % video_id
 376         request = compat_urllib_request.Request(url)
 377         try:
 378             video_webpage_bytes = compat_urllib_request.urlopen(request).read()
 379         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 380             raise ExtractorError(u'Unable to download video webpage: %s' % compat_str(err))
 381
 382         video_webpage = video_webpage_bytes.decode('utf-8', 'ignore')
 383
 384         # Attempt to extract SWF player URL
 385         mobj = re.search(r'swfConfig.*?"(http:\\/\\/.*?watch.*?-.*?\.swf)"', video_webpage)
 386         if mobj is not None:
 387             player_url = re.sub(r'\\(.)', r'\1', mobj.group(1))
 388         else:
 389             player_url = None
 390
 391         # Get video info
 392         self.report_video_info_webpage_download(video_id)
 393         for el_type in ['&el=embedded', '&el=detailpage', '&el=vevo', '']:
 394             video_info_url = ('https://www.youtube.com/get_video_info?&video_id=%s%s&ps=default&eurl=&gl=US&hl=en'
 395                     % (video_id, el_type))
 396             video_info_webpage = self._download_webpage(video_info_url, video_id,
 397                                     note=False,
 398                                     errnote='unable to download video info webpage')
 399             video_info = compat_parse_qs(video_info_webpage)
 400             if 'token' in video_info:
 401                 break
 402         if 'token' not in video_info:
 403             if 'reason' in video_info:
 404                 raise ExtractorError(u'YouTube said: %s' % video_info['reason'][0])
 405             else:
 406                 raise ExtractorError(u'"token" parameter not in video info for unknown reason')
 407
 408         # Check for "rental" videos
 409         if 'ypc_video_rental_bar_text' in video_info and 'author' not in video_info:
 410             raise ExtractorError(u'"rental" videos not supported')
 411
 412         # Start extracting information
 413         self.report_information_extraction(video_id)
 414
 415         # uploader
 416         if 'author' not in video_info:
 417             raise ExtractorError(u'Unable to extract uploader name')
 418         video_uploader = compat_urllib_parse.unquote_plus(video_info['author'][0])
 419
 420         # uploader_id
 421         video_uploader_id = None
 422         mobj = re.search(r'<link itemprop="url" href="http://www.youtube.com/(?:user|channel)/([^"]+)">', video_webpage)
 423         if mobj is not None:
 424             video_uploader_id = mobj.group(1)
 425         else:
 426             self._downloader.report_warning(u'unable to extract uploader nickname')
 427
 428         # title
 429         if 'title' not in video_info:
 430             raise ExtractorError(u'Unable to extract video title')
 431         video_title = compat_urllib_parse.unquote_plus(video_info['title'][0])
 432
 433         # thumbnail image
 434         if 'thumbnail_url' not in video_info:
 435             self._downloader.report_warning(u'unable to extract video thumbnail')
 436             video_thumbnail = ''
 437         else:   # don't panic if we can't find it
 438             video_thumbnail = compat_urllib_parse.unquote_plus(video_info['thumbnail_url'][0])
 439
 440         # upload date
 441         upload_date = None
 442         mobj = re.search(r'id="eow-date.*?>(.*?)</span>', video_webpage, re.DOTALL)
 443         if mobj is not None:
 444             upload_date = ' '.join(re.sub(r'[/,-]', r' ', mobj.group(1)).split())
 445             upload_date = unified_strdate(upload_date)
 446
 447         # description
 448         video_description = get_element_by_id("eow-description", video_webpage)
 449         if video_description:
 450             video_description = clean_html(video_description)
 451         else:
 452             fd_mobj = re.search(r'<meta name="description" content="([^"]+)"', video_webpage)
 453             if fd_mobj:
 454                 video_description = unescapeHTML(fd_mobj.group(1))
 455             else:
 456                 video_description = u''
 457
 458         # subtitles
 459         video_subtitles = None
 460
 461         if self._downloader.params.get('writesubtitles', False):
 462             video_subtitles = self._extract_subtitle(video_id)
 463             if video_subtitles:
 464                 (sub_error, sub_lang, sub) = video_subtitles[0]
 465                 if sub_error:
 466                     self._downloader.report_warning(sub_error)
 467
 468         if self._downloader.params.get('writeautomaticsub', False):
 469             video_subtitles = self._request_automatic_caption(video_id, video_webpage)
 470             (sub_error, sub_lang, sub) = video_subtitles[0]
 471             if sub_error:
 472                 self._downloader.report_warning(sub_error)
 473
 474         if self._downloader.params.get('allsubtitles', False):
 475             video_subtitles = self._extract_all_subtitles(video_id)
 476             for video_subtitle in video_subtitles:
 477                 (sub_error, sub_lang, sub) = video_subtitle
 478                 if sub_error:
 479                     self._downloader.report_warning(sub_error)
 480
 481         if self._downloader.params.get('listsubtitles', False):
 482             self._list_available_subtitles(video_id)
 483             return
 484
 485         if 'length_seconds' not in video_info:
 486             self._downloader.report_warning(u'unable to extract video duration')
 487             video_duration = ''
 488         else:
 489             video_duration = compat_urllib_parse.unquote_plus(video_info['length_seconds'][0])
 490
 491         # Decide which formats to download
 492         req_format = self._downloader.params.get('format', None)
 493
 494         try:
 495             mobj = re.search(r';ytplayer.config = ({.*?});', video_webpage)
 496             if not mobj:
 497                 raise ValueError('Could not find vevo ID')
 498             info = json.loads(mobj.group(1))
 499             args = info['args']
 500             # Easy way to know if the 's' value is in url_encoded_fmt_stream_map
 501             # this signatures are encrypted
 502             m_s = re.search(r'[&,]s=', args['url_encoded_fmt_stream_map'])
 503             if m_s is not None:
 504                 self.to_screen(u'%s: Encrypted signatures detected.' % video_id)
 505                 video_info['url_encoded_fmt_stream_map'] = [args['url_encoded_fmt_stream_map']]
 506         except ValueError:
 507             pass
 508
 509         if 'conn' in video_info and video_info['conn'][0].startswith('rtmp'):
 510             self.report_rtmp_download()
 511             video_url_list = [(None, video_info['conn'][0])]
 512         elif 'url_encoded_fmt_stream_map' in video_info and len(video_info['url_encoded_fmt_stream_map']) >= 1:
 513             url_map = {}
 514             for url_data_str in video_info['url_encoded_fmt_stream_map'][0].split(','):
 515                 url_data = compat_parse_qs(url_data_str)
 516                 if 'itag' in url_data and 'url' in url_data:
 517                     url = url_data['url'][0]
 518                     if 'sig' in url_data:
 519                         url += '&signature=' + url_data['sig'][0]
 520                     elif 's' in url_data:
 521                         if self._downloader.params.get('verbose'):
 522                             s = url_data['s'][0]
 523                             player = self._search_regex(r'html5player-(.+?)\.js', video_webpage,
 524                                 'html5 player', fatal=False)
 525                             self.to_screen('encrypted signature length %d (%d.%d), itag %s, html5 player %s' %
 526                                 (len(s), len(s.split('.')[0]), len(s.split('.')[1]), url_data['itag'][0], player))
 527                         signature = self._decrypt_signature(url_data['s'][0])
 528                         url += '&signature=' + signature
 529                     if 'ratebypass' not in url:
 530                         url += '&ratebypass=yes'
 531                     url_map[url_data['itag'][0]] = url
 532
 533             format_limit = self._downloader.params.get('format_limit', None)
 534             available_formats = self._available_formats_prefer_free if self._downloader.params.get('prefer_free_formats', False) else self._available_formats
 535             if format_limit is not None and format_limit in available_formats:
 536                 format_list = available_formats[available_formats.index(format_limit):]
 537             else:
 538                 format_list = available_formats
 539             existing_formats = [x for x in format_list if x in url_map]
 540             if len(existing_formats) == 0:
 541                 raise ExtractorError(u'no known formats available for video')
 542             if self._downloader.params.get('listformats', None):
 543                 self._print_formats(existing_formats)
 544                 return
 545             if req_format is None or req_format == 'best':
 546                 video_url_list = [(existing_formats[0], url_map[existing_formats[0]])] # Best quality
 547             elif req_format == 'worst':
 548                 video_url_list = [(existing_formats[len(existing_formats)-1], url_map[existing_formats[len(existing_formats)-1]])] # worst quality
 549             elif req_format in ('-1', 'all'):
 550                 video_url_list = [(f, url_map[f]) for f in existing_formats] # All formats
 551             else:
 552                 # Specific formats. We pick the first in a slash-delimeted sequence.
 553                 # For example, if '1/2/3/4' is requested and '2' and '4' are available, we pick '2'.
 554                 req_formats = req_format.split('/')
 555                 video_url_list = None
 556                 for rf in req_formats:
 557                     if rf in url_map:
 558                         video_url_list = [(rf, url_map[rf])]
 559                         break
 560                 if video_url_list is None:
 561                     raise ExtractorError(u'requested format not available')
 562         else:
 563             raise ExtractorError(u'no conn or url_encoded_fmt_stream_map information found in video info')
 564
 565         results = []
 566         for format_param, video_real_url in video_url_list:
 567             # Extension
 568             video_extension = self._video_extensions.get(format_param, 'flv')
 569
 570             video_format = '{0} - {1}'.format(format_param if format_param else video_extension,
 571                                               self._video_dimensions.get(format_param, '???'))
 572
 573             results.append({
 574                 'id':       video_id,
 575                 'url':      video_real_url,
 576                 'uploader': video_uploader,
 577                 'uploader_id': video_uploader_id,
 578                 'upload_date':  upload_date,
 579                 'title':    video_title,
 580                 'ext':      video_extension,
 581                 'format':   video_format,
 582                 'thumbnail':    video_thumbnail,
 583                 'description':  video_description,
 584                 'player_url':   player_url,
 585                 'subtitles':    video_subtitles,
 586                 'duration':     video_duration
 587             })
 588         return results
 589
 590 class YoutubePlaylistIE(InfoExtractor):
 591     """Information Extractor for YouTube playlists."""
 592
 593     _VALID_URL = r"""(?:
 594                         (?:https?://)?
 595                         (?:\w+\.)?
 596                         youtube\.com/
 597                         (?:
 598                            (?:course|view_play_list|my_playlists|artist|playlist|watch)
 599                            \? (?:.*?&)*? (?:p|a|list)=
 600                         |  p/
 601                         )
 602                         ((?:PL|EC|UU)?[0-9A-Za-z-_]{10,})
 603                         .*
 604                      |
 605                         ((?:PL|EC|UU)[0-9A-Za-z-_]{10,})
 606                      )"""
 607     _TEMPLATE_URL = 'https://gdata.youtube.com/feeds/api/playlists/%s?max-results=%i&start-index=%i&v=2&alt=json&safeSearch=none'
 608     _MAX_RESULTS = 50
 609     IE_NAME = u'youtube:playlist'
 610
 611     @classmethod
 612     def suitable(cls, url):
 613         """Receives a URL and returns True if suitable for this IE."""
 614         return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
 615
 616     def _real_extract(self, url):
 617         # Extract playlist id
 618         mobj = re.match(self._VALID_URL, url, re.VERBOSE)
 619         if mobj is None:
 620             raise ExtractorError(u'Invalid URL: %s' % url)
 621
 622         # Download playlist videos from API
 623         playlist_id = mobj.group(1) or mobj.group(2)
 624         page_num = 1
 625         videos = []
 626
 627         while True:
 628             url = self._TEMPLATE_URL % (playlist_id, self._MAX_RESULTS, self._MAX_RESULTS * (page_num - 1) + 1)
 629             page = self._download_webpage(url, playlist_id, u'Downloading page #%s' % page_num)
 630
 631             try:
 632                 response = json.loads(page)
 633             except ValueError as err:
 634                 raise ExtractorError(u'Invalid JSON in API response: ' + compat_str(err))
 635
 636             if 'feed' not in response:
 637                 raise ExtractorError(u'Got a malformed response from YouTube API')
 638             playlist_title = response['feed']['title']['$t']
 639             if 'entry' not in response['feed']:
 640                 # Number of videos is a multiple of self._MAX_RESULTS
 641                 break
 642
 643             for entry in response['feed']['entry']:
 644                 index = entry['yt$position']['$t']
 645                 if 'media$group' in entry and 'media$player' in entry['media$group']:
 646                     videos.append((index, entry['media$group']['media$player']['url']))
 647
 648             if len(response['feed']['entry']) < self._MAX_RESULTS:
 649                 break
 650             page_num += 1
 651
 652         videos = [v[1] for v in sorted(videos)]
 653
 654         url_results = [self.url_result(url, 'Youtube') for url in videos]
 655         return [self.playlist_result(url_results, playlist_id, playlist_title)]
 656
 657
 658 class YoutubeChannelIE(InfoExtractor):
 659     """Information Extractor for YouTube channels."""
 660
 661     _VALID_URL = r"^(?:https?://)?(?:youtu\.be|(?:\w+\.)?youtube(?:-nocookie)?\.com)/channel/([0-9A-Za-z_-]+)"
 662     _TEMPLATE_URL = 'http://www.youtube.com/channel/%s/videos?sort=da&flow=list&view=0&page=%s&gl=US&hl=en'
 663     _MORE_PAGES_INDICATOR = 'yt-uix-load-more'
 664     _MORE_PAGES_URL = 'http://www.youtube.com/channel_ajax?action_load_more_videos=1&flow=list&paging=%s&view=0&sort=da&channel_id=%s'
 665     IE_NAME = u'youtube:channel'
 666
 667     def extract_videos_from_page(self, page):
 668         ids_in_page = []
 669         for mobj in re.finditer(r'href="/watch\?v=([0-9A-Za-z_-]+)&?', page):
 670             if mobj.group(1) not in ids_in_page:
 671                 ids_in_page.append(mobj.group(1))
 672         return ids_in_page
 673
 674     def _real_extract(self, url):
 675         # Extract channel id
 676         mobj = re.match(self._VALID_URL, url)
 677         if mobj is None:
 678             raise ExtractorError(u'Invalid URL: %s' % url)
 679
 680         # Download channel page
 681         channel_id = mobj.group(1)
 682         video_ids = []
 683         pagenum = 1
 684
 685         url = self._TEMPLATE_URL % (channel_id, pagenum)
 686         page = self._download_webpage(url, channel_id,
 687                                       u'Downloading page #%s' % pagenum)
 688
 689         # Extract video identifiers
 690         ids_in_page = self.extract_videos_from_page(page)
 691         video_ids.extend(ids_in_page)
 692
 693         # Download any subsequent channel pages using the json-based channel_ajax query
 694         if self._MORE_PAGES_INDICATOR in page:
 695             while True:
 696                 pagenum = pagenum + 1
 697
 698                 url = self._MORE_PAGES_URL % (pagenum, channel_id)
 699                 page = self._download_webpage(url, channel_id,
 700                                               u'Downloading page #%s' % pagenum)
 701
 702                 page = json.loads(page)
 703
 704                 ids_in_page = self.extract_videos_from_page(page['content_html'])
 705                 video_ids.extend(ids_in_page)
 706
 707                 if self._MORE_PAGES_INDICATOR  not in page['load_more_widget_html']:
 708                     break
 709
 710         self._downloader.to_screen(u'[youtube] Channel %s: Found %i videos' % (channel_id, len(video_ids)))
 711
 712         urls = ['http://www.youtube.com/watch?v=%s' % id for id in video_ids]
 713         url_entries = [self.url_result(url, 'Youtube') for url in urls]
 714         return [self.playlist_result(url_entries, channel_id)]
 715
 716
 717 class YoutubeUserIE(InfoExtractor):
 718     """Information Extractor for YouTube users."""
 719
 720     _VALID_URL = r'(?:(?:(?:https?://)?(?:\w+\.)?youtube\.com/user/)|ytuser:)([A-Za-z0-9_-]+)'
 721     _TEMPLATE_URL = 'http://gdata.youtube.com/feeds/api/users/%s'
 722     _GDATA_PAGE_SIZE = 50
 723     _GDATA_URL = 'http://gdata.youtube.com/feeds/api/users/%s/uploads?max-results=%d&start-index=%d'
 724     _VIDEO_INDICATOR = r'/watch\?v=(.+?)[\<&]'
 725     IE_NAME = u'youtube:user'
 726
 727     def _real_extract(self, url):
 728         # Extract username
 729         mobj = re.match(self._VALID_URL, url)
 730         if mobj is None:
 731             raise ExtractorError(u'Invalid URL: %s' % url)
 732
 733         username = mobj.group(1)
 734
 735         # Download video ids using YouTube Data API. Result size per
 736         # query is limited (currently to 50 videos) so we need to query
 737         # page by page until there are no video ids - it means we got
 738         # all of them.
 739
 740         video_ids = []
 741         pagenum = 0
 742
 743         while True:
 744             start_index = pagenum * self._GDATA_PAGE_SIZE + 1
 745
 746             gdata_url = self._GDATA_URL % (username, self._GDATA_PAGE_SIZE, start_index)
 747             page = self._download_webpage(gdata_url, username,
 748                                           u'Downloading video ids from %d to %d' % (start_index, start_index + self._GDATA_PAGE_SIZE))
 749
 750             # Extract video identifiers
 751             ids_in_page = []
 752
 753             for mobj in re.finditer(self._VIDEO_INDICATOR, page):
 754                 if mobj.group(1) not in ids_in_page:
 755                     ids_in_page.append(mobj.group(1))
 756
 757             video_ids.extend(ids_in_page)
 758
 759             # A little optimization - if current page is not
 760             # "full", ie. does not contain PAGE_SIZE video ids then
 761             # we can assume that this page is the last one - there
 762             # are no more ids on further pages - no need to query
 763             # again.
 764
 765             if len(ids_in_page) < self._GDATA_PAGE_SIZE:
 766                 break
 767
 768             pagenum += 1
 769
 770         urls = ['http://www.youtube.com/watch?v=%s' % video_id for video_id in video_ids]
 771         url_results = [self.url_result(url, 'Youtube') for url in urls]
 772         return [self.playlist_result(url_results, playlist_title = username)]
 773
 774 class YoutubeSearchIE(SearchInfoExtractor):
 775     """Information Extractor for YouTube search queries."""
 776     _API_URL = 'https://gdata.youtube.com/feeds/api/videos?q=%s&start-index=%i&max-results=50&v=2&alt=jsonc'
 777     _MAX_RESULTS = 1000
 778     IE_NAME = u'youtube:search'
 779     _SEARCH_KEY = 'ytsearch'
 780
 781     def report_download_page(self, query, pagenum):
 782         """Report attempt to download search page with given number."""
 783         self._downloader.to_screen(u'[youtube] query "%s": Downloading page %s' % (query, pagenum))
 784
 785     def _get_n_results(self, query, n):
 786         """Get a specified number of results for a query"""
 787
 788         video_ids = []
 789         pagenum = 0
 790         limit = n
 791
 792         while (50 * pagenum) < limit:
 793             self.report_download_page(query, pagenum+1)
 794             result_url = self._API_URL % (compat_urllib_parse.quote_plus(query), (50*pagenum)+1)
 795             request = compat_urllib_request.Request(result_url)
 796             try:
 797                 data = compat_urllib_request.urlopen(request).read().decode('utf-8')
 798             except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 799                 raise ExtractorError(u'Unable to download API page: %s' % compat_str(err))
 800             api_response = json.loads(data)['data']
 801
 802             if not 'items' in api_response:
 803                 raise ExtractorError(u'[youtube] No video results')
 804
 805             new_ids = list(video['id'] for video in api_response['items'])
 806             video_ids += new_ids
 807
 808             limit = min(n, api_response['totalItems'])
 809             pagenum += 1
 810
 811         if len(video_ids) > n:
 812             video_ids = video_ids[:n]
 813         videos = [self.url_result('http://www.youtube.com/watch?v=%s' % id, 'Youtube') for id in video_ids]
 814         return self.playlist_result(videos, query)