text: from __future__ import unicode_literals
  
  import re
  
  from .common import InfoExtractor
  from ..utils import (
      determine_ext,
      ExtractorError,
      int_or_none,
      lowercase_escape,
      update_url_query,
  )
  
  
  class GoogleDriveIE(InfoExtractor):
      _VALID_URL = r'''(?x)
                          https?://
                              (?:
                                  (?:docs|drive)\.google\.com/
                                  (?:
                                      (?:uc|open)\?.*?id=|
                                      file/d/
                                  )|
                                  video\.google\.com/get_player\?.*?docid=
                              )
                              (?P<id>[a-zA-Z0-9_-]{28,})
                      '''
      _TESTS = [{
          'url': 'https://drive.google.com/file/d/0ByeS4oOUV-49Zzh4R1J6R09zazQ/edit?pli=1',
          'md5': '5c602afbbf2c1db91831f5d82f678554',
          'info_dict': {
              'id': '0ByeS4oOUV-49Zzh4R1J6R09zazQ',
              'ext': 'mp4',
              'title': 'Big Buck Bunny.mp4',
              'duration': 45,
          }
      }, {
          # video can't be watched anonymously due to view count limit reached,
          # but can be downloaded (see https://github.com/rg3/youtube-dl/issues/14046)
          'url': 'https://drive.google.com/file/d/0B-vUyvmDLdWDcEt4WjBqcmI2XzQ/view',
          'md5': 'bfbd670d03a470bb1e6d4a257adec12e',
          'info_dict': {
              'id': '0B-vUyvmDLdWDcEt4WjBqcmI2XzQ',
              'ext': 'mp4',
              'title': 'Annabelle Creation (2017)- Z.V1 [TH].MP4',
          }
      }, {
          # video id is longer than 28 characters
          'url': 'https://drive.google.com/file/d/1ENcQ_jeCuj7y19s66_Ou9dRP4GKGsodiDQ/edit',
          'info_dict': {
              'id': '1ENcQ_jeCuj7y19s66_Ou9dRP4GKGsodiDQ',
              'ext': 'mp4',
              'title': 'Andreea Banica feat Smiley - Hooky Song (Official Video).mp4',
              'duration': 189,
          },
          'only_matching': True,
      }, {
          'url': 'https://drive.google.com/open?id=0B2fjwgkl1A_CX083Tkowdmt6d28',
          'only_matching': True,
      }, {
          'url': 'https://drive.google.com/uc?id=0B2fjwgkl1A_CX083Tkowdmt6d28',
          'only_matching': True,
      }]
      _FORMATS_EXT = {
          '5': 'flv',
          '6': 'flv',
          '13': '3gp',
          '17': '3gp',
          '18': 'mp4',
          '22': 'mp4',
          '34': 'flv',
          '35': 'flv',
          '36': '3gp',
          '37': 'mp4',
          '38': 'mp4',
          '43': 'webm',
          '44': 'webm',
          '45': 'webm',
          '46': 'webm',
          '59': 'mp4',
      }
      _BASE_URL_CAPTIONS = 'https://drive.google.com/timedtext'
      _CAPTIONS_ENTRY_TAG = {
          'subtitles': 'track',
          'automatic_captions': 'target',
      }
      _caption_formats_ext = []
      _captions_xml = None
  
      @staticmethod
      def _extract_url(webpage):
          mobj = re.search(
              r'<iframe[^>]+src="https?://(?:video\.google\.com/get_player\?.*?docid=|(?:docs|drive)\.google\.com/file/d/)(?P<id>[a-zA-Z0-9_-]{28,})',
              webpage)
          if mobj:
              return 'https://drive.google.com/file/d/%s' % mobj.group('id')
  
      def _download_subtitles_xml(self, video_id, subtitles_id, hl):
          if self._captions_xml:
              return
          self._captions_xml = self._download_xml(
              self._BASE_URL_CAPTIONS, video_id, query={
                  'id': video_id,
                  'vid': subtitles_id,
                  'hl': hl,
                  'v': video_id,
                  'type': 'list',
                  'tlangs': '1',
                  'fmts': '1',
                  'vssids': '1',
              }, note='Downloading subtitles XML',
              errnote='Unable to download subtitles XML', fatal=False)
          if self._captions_xml:
              for f in self._captions_xml.findall('format'):
                  if f.attrib.get('fmt_code') and not f.attrib.get('default'):
                      self._caption_formats_ext.append(f.attrib['fmt_code'])
  
      def _get_captions_by_type(self, video_id, subtitles_id, caption_type,
                                origin_lang_code=None):
          if not subtitles_id or not caption_type:
              return
          captions = {}
          for caption_entry in self._captions_xml.findall(
                  self._CAPTIONS_ENTRY_TAG[caption_type]):
              caption_lang_code = caption_entry.attrib.get('lang_code')
              if not caption_lang_code:
                  continue
              caption_format_data = []
              for caption_format in self._caption_formats_ext:
                  query = {
                      'vid': subtitles_id,
                      'v': video_id,
                      'fmt': caption_format,
                      'lang': (caption_lang_code if origin_lang_code is None
                               else origin_lang_code),
                      'type': 'track',
                      'name': '',
                      'kind': '',
                  }
                  if origin_lang_code is not None:
                      query.update({'tlang': caption_lang_code})
                  caption_format_data.append({
                      'url': update_url_query(self._BASE_URL_CAPTIONS, query),
                      'ext': caption_format,
                  })
              captions[caption_lang_code] = caption_format_data
          return captions
  
      def _get_subtitles(self, video_id, subtitles_id, hl):
          if not subtitles_id or not hl:
              return
          self._download_subtitles_xml(video_id, subtitles_id, hl)
          if not self._captions_xml:
              return
          return self._get_captions_by_type(video_id, subtitles_id, 'subtitles')
  
      def _get_automatic_captions(self, video_id, subtitles_id, hl):
          if not subtitles_id or not hl:
              return
          self._download_subtitles_xml(video_id, subtitles_id, hl)
          if not self._captions_xml:
              return
          track = self._captions_xml.find('track')
          if track is None:
              return
          origin_lang_code = track.attrib.get('lang_code')
          if not origin_lang_code:
              return
          return self._get_captions_by_type(
              video_id, subtitles_id, 'automatic_captions', origin_lang_code)
  
      def _real_extract(self, url):
          video_id = self._match_id(url)
          webpage = self._download_webpage(
              'http://docs.google.com/file/d/%s' % video_id, video_id)
  
          title = self._search_regex(
              r'"title"\s*,\s*"([^"]+)', webpage, 'title',
              default=None) or self._og_search_title(webpage)
          duration = int_or_none(self._search_regex(
              r'"length_seconds"\s*,\s*"([^"]+)', webpage, 'length seconds',
              default=None))
  
          formats = []
          fmt_stream_map = self._search_regex(
              r'"fmt_stream_map"\s*,\s*"([^"]+)', webpage,
              'fmt stream map', default='').split(',')
          fmt_list = self._search_regex(
              r'"fmt_list"\s*,\s*"([^"]+)', webpage,
              'fmt_list', default='').split(',')
          if fmt_stream_map and fmt_list:
              resolutions = {}
              for fmt in fmt_list:
                  mobj = re.search(
                      r'^(?P<format_id>\d+)/(?P<width>\d+)[xX](?P<height>\d+)', fmt)
                  if mobj:
                      resolutions[mobj.group('format_id')] = (
                          int(mobj.group('width')), int(mobj.group('height')))
  
              for fmt_stream in fmt_stream_map:
                  fmt_stream_split = fmt_stream.split('|')
                  if len(fmt_stream_split) < 2:
                      continue
                  format_id, format_url = fmt_stream_split[:2]
                  f = {
                      'url': lowercase_escape(format_url),
                      'format_id': format_id,
                      'ext': self._FORMATS_EXT[format_id],
                  }
                  resolution = resolutions.get(format_id)
                  if resolution:
                      f.update({
                          'width': resolution[0],
                          'height': resolution[1],
                      })
                  formats.append(f)
  
          source_url = update_url_query(
              'https://drive.google.com/uc', {
                  'id': video_id,
                  'export': 'download',
              })
          urlh = self._request_webpage(
              source_url, video_id, note='Requesting source file',
              errnote='Unable to request source file', fatal=False)
          if urlh:
              def add_source_format(src_url):
                  formats.append({
                      'url': src_url,
                      'ext': determine_ext(title, 'mp4').lower(),
                      'format_id': 'source',
                      'quality': 1,
                  })
              if urlh.headers.get('Content-Disposition'):
                  add_source_format(source_url)
              else:
                  confirmation_webpage = self._webpage_read_content(
                      urlh, url, video_id, note='Downloading confirmation page',
                      errnote='Unable to confirm download', fatal=False)
                  if confirmation_webpage:
                      confirm = self._search_regex(
                          r'confirm=([^&"\']+)', confirmation_webpage,
                          'confirmation code', fatal=False)
                      if confirm:
                          add_source_format(update_url_query(source_url, {
                              'confirm': confirm,
                          }))
  
          if not formats:
              reason = self._search_regex(
                  r'"reason"\s*,\s*"([^"]+)', webpage, 'reason', default=None)
              if reason:
                  raise ExtractorError(reason, expected=True)
  
          self._sort_formats(formats)
  
          hl = self._search_regex(
              r'"hl"\s*,\s*"([^"]+)', webpage, 'hl', default=None)
          subtitles_id = None
          ttsurl = self._search_regex(
              r'"ttsurl"\s*,\s*"([^"]+)', webpage, 'ttsurl', default=None)
          if ttsurl:
              # the video Id for subtitles will be the last value in the ttsurl
              # query string
              subtitles_id = ttsurl.encode('utf-8').decode(
                  'unicode_escape').split('=')[-1]
  
          return {
              'id': video_id,
              'title': title,
              'thumbnail': self._og_search_thumbnail(webpage, default=None),
              'duration': duration,
              'formats': formats,
              'subtitles': self.extract_subtitles(video_id, subtitles_id, hl),
              'automatic_captions': self.extract_automatic_captions(
                  video_id, subtitles_id, hl),
          }
  