text: from __future__ import unicode_literals
  
  import base64
  import functools
  import itertools
  import re
  
  from .common import InfoExtractor
  from ..compat import (
      compat_chr,
      compat_ord,
      compat_urllib_parse_unquote,
      compat_urlparse,
  )
  from ..utils import (
      clean_html,
      ExtractorError,
      OnDemandPagedList,
      parse_count,
      str_to_int,
  )
  
  
  class MixcloudIE(InfoExtractor):
      _VALID_URL = r'^(?:https?://)?(?:www\.)?mixcloud\.com/([^/]+)/(?!stream|uploads|favorites|listens|playlists)([^/]+)'
      IE_NAME = 'mixcloud'
  
      _TESTS = [{
          'url': 'http://www.mixcloud.com/dholbach/cryptkeeper/',
          'info_dict': {
              'id': 'dholbach-cryptkeeper',
              'ext': 'm4a',
              'title': 'Cryptkeeper',
              'description': 'After quite a long silence from myself, finally another Drum\'n\'Bass mix with my favourite current dance floor bangers.',
              'uploader': 'Daniel Holbach',
              'uploader_id': 'dholbach',
              'thumbnail': 're:https?://.*\.jpg',
              'view_count': int,
              'like_count': int,
          },
      }, {
          'url': 'http://www.mixcloud.com/gillespeterson/caribou-7-inch-vinyl-mix-chat/',
          'info_dict': {
              'id': 'gillespeterson-caribou-7-inch-vinyl-mix-chat',
              'ext': 'mp3',
              'title': 'Caribou 7 inch Vinyl Mix & Chat',
              'description': 'md5:2b8aec6adce69f9d41724647c65875e8',
              'uploader': 'Gilles Peterson Worldwide',
              'uploader_id': 'gillespeterson',
              'thumbnail': 're:https?://.*',
              'view_count': int,
              'like_count': int,
          },
      }]
  
      # See https://www.mixcloud.com/media/js2/www_js_2.9e23256562c080482435196ca3975ab5.js
      @staticmethod
      def _decrypt_play_info(play_info):
          KEY = 'pleasedontdownloadourmusictheartistswontgetpaid'
  
          play_info = base64.b64decode(play_info.encode('ascii'))
  
          return ''.join([
              compat_chr(compat_ord(ch) ^ compat_ord(KEY[idx % len(KEY)]))
              for idx, ch in enumerate(play_info)])
  
      def _real_extract(self, url):
          mobj = re.match(self._VALID_URL, url)
          uploader = mobj.group(1)
          cloudcast_name = mobj.group(2)
          track_id = compat_urllib_parse_unquote('-'.join((uploader, cloudcast_name)))
  
          webpage = self._download_webpage(url, track_id)
  
          message = self._html_search_regex(
              r'(?s)<div[^>]+class="global-message cloudcast-disabled-notice-light"[^>]*>(.+?)<(?:a|/div)',
              webpage, 'error message', default=None)
  
          encrypted_play_info = self._search_regex(
              r'm-play-info="([^"]+)"', webpage, 'play info')
          play_info = self._parse_json(
              self._decrypt_play_info(encrypted_play_info), track_id)
  
          if message and 'stream_url' not in play_info:
              raise ExtractorError('%s said: %s' % (self.IE_NAME, message), expected=True)
  
          song_url = play_info['stream_url']
  
          PREFIX = (
              r'm-play-on-spacebar[^>]+'
              r'(?:\s+[a-zA-Z0-9-]+(?:="[^"]+")?)*?\s+')
          title = self._html_search_regex(
              PREFIX + r'm-title="([^"]+)"', webpage, 'title')
          thumbnail = self._proto_relative_url(self._html_search_regex(
              PREFIX + r'm-thumbnail-url="([^"]+)"', webpage, 'thumbnail',
              fatal=False))
          uploader = self._html_search_regex(
              PREFIX + r'm-owner-name="([^"]+)"',
              webpage, 'uploader', fatal=False)
          uploader_id = self._search_regex(
              r'\s+"profile": "([^"]+)",', webpage, 'uploader id', fatal=False)
          description = self._og_search_description(webpage)
          like_count = parse_count(self._search_regex(
              r'\bbutton-favorite[^>]+>.*?<span[^>]+class=["\']toggle-number[^>]+>\s*([^<]+)',
              webpage, 'like count', default=None))
          view_count = str_to_int(self._search_regex(
              [r'<meta itemprop="interactionCount" content="UserPlays:([0-9]+)"',
               r'/listeners/?">([0-9,.]+)</a>'],
              webpage, 'play count', default=None))
  
          return {
              'id': track_id,
              'title': title,
              'url': song_url,
              'description': description,
              'thumbnail': thumbnail,
              'uploader': uploader,
              'uploader_id': uploader_id,
              'view_count': view_count,
              'like_count': like_count,
          }
  
  
  class MixcloudPlaylistBaseIE(InfoExtractor):
      _PAGE_SIZE = 24
  
      def _find_urls_in_page(self, page):
          for url in re.findall(r'm-play-button m-url="(?P<url>[^"]+)"', page):
              yield self.url_result(
                  compat_urlparse.urljoin('https://www.mixcloud.com', clean_html(url)),
                  MixcloudIE.ie_key())
  
      def _fetch_tracks_page(self, path, video_id, page_name, current_page, real_page_number=None):
          real_page_number = real_page_number or current_page + 1
          return self._download_webpage(
              'https://www.mixcloud.com/%s/' % path, video_id,
              note='Download %s (page %d)' % (page_name, current_page + 1),
              errnote='Unable to download %s' % page_name,
              query={'page': real_page_number, 'list': 'main', '_ajax': '1'},
              headers={'X-Requested-With': 'XMLHttpRequest'})
  
      def _tracks_page_func(self, page, video_id, page_name, current_page):
          resp = self._fetch_tracks_page(page, video_id, page_name, current_page)
  
          for item in self._find_urls_in_page(resp):
              yield item
  
      def _get_user_description(self, page_content):
          return self._html_search_regex(
              r'<div[^>]+class="description-text"[^>]*>(.+?)</div>',
              page_content, 'user description', fatal=False)
  
  
  class MixcloudUserIE(MixcloudPlaylistBaseIE):
      _VALID_URL = r'^(?:https?://)?(?:www\.)?mixcloud\.com/(?P<user>[^/]+)/(?P<type>uploads|favorites|listens)?/?$'
      IE_NAME = 'mixcloud:user'
  
      _TESTS = [{
          'url': 'http://www.mixcloud.com/dholbach/',
          'info_dict': {
              'id': 'dholbach_uploads',
              'title': 'Daniel Holbach (uploads)',
              'description': 'md5:327af72d1efeb404a8216c27240d1370',
          },
          'playlist_mincount': 11,
      }, {
          'url': 'http://www.mixcloud.com/dholbach/uploads/',
          'info_dict': {
              'id': 'dholbach_uploads',
              'title': 'Daniel Holbach (uploads)',
              'description': 'md5:327af72d1efeb404a8216c27240d1370',
          },
          'playlist_mincount': 11,
      }, {
          'url': 'http://www.mixcloud.com/dholbach/favorites/',
          'info_dict': {
              'id': 'dholbach_favorites',
              'title': 'Daniel Holbach (favorites)',
              'description': 'md5:327af72d1efeb404a8216c27240d1370',
          },
          'params': {
              'playlist_items': '1-100',
          },
          'playlist_mincount': 100,
      }, {
          'url': 'http://www.mixcloud.com/dholbach/listens/',
          'info_dict': {
              'id': 'dholbach_listens',
              'title': 'Daniel Holbach (listens)',
              'description': 'md5:327af72d1efeb404a8216c27240d1370',
          },
          'params': {
              'playlist_items': '1-100',
          },
          'playlist_mincount': 100,
      }]
  
      def _real_extract(self, url):
          mobj = re.match(self._VALID_URL, url)
          user_id = mobj.group('user')
          list_type = mobj.group('type')
  
          # if only a profile URL was supplied, default to download all uploads
          if list_type is None:
              list_type = 'uploads'
  
          video_id = '%s_%s' % (user_id, list_type)
  
          profile = self._download_webpage(
              'https://www.mixcloud.com/%s/' % user_id, video_id,
              note='Downloading user profile',
              errnote='Unable to download user profile')
  
          username = self._og_search_title(profile)
          description = self._get_user_description(profile)
  
          entries = OnDemandPagedList(
              functools.partial(
                  self._tracks_page_func,
                  '%s/%s' % (user_id, list_type), video_id, 'list of %s' % list_type),
              self._PAGE_SIZE, use_cache=True)
  
          return self.playlist_result(
              entries, video_id, '%s (%s)' % (username, list_type), description)
  
  
  class MixcloudPlaylistIE(MixcloudPlaylistBaseIE):
      _VALID_URL = r'^(?:https?://)?(?:www\.)?mixcloud\.com/(?P<user>[^/]+)/playlists/(?P<playlist>[^/]+)/?$'
      IE_NAME = 'mixcloud:playlist'
  
      _TESTS = [{
          'url': 'https://www.mixcloud.com/RedBullThre3style/playlists/tokyo-finalists-2015/',
          'info_dict': {
              'id': 'RedBullThre3style_tokyo-finalists-2015',
              'title': 'National Champions 2015',
              'description': 'md5:6ff5fb01ac76a31abc9b3939c16243a3',
          },
          'playlist_mincount': 16,
      }, {
          'url': 'https://www.mixcloud.com/maxvibes/playlists/jazzcat-on-ness-radio/',
          'info_dict': {
              'id': 'maxvibes_jazzcat-on-ness-radio',
              'title': 'Jazzcat on Ness Radio',
              'description': 'md5:7bbbf0d6359a0b8cda85224be0f8f263',
          },
          'playlist_mincount': 23
      }]
  
      def _real_extract(self, url):
          mobj = re.match(self._VALID_URL, url)
          user_id = mobj.group('user')
          playlist_id = mobj.group('playlist')
          video_id = '%s_%s' % (user_id, playlist_id)
  
          profile = self._download_webpage(
              url, user_id,
              note='Downloading playlist page',
              errnote='Unable to download playlist page')
  
          description = self._get_user_description(profile)
          playlist_title = self._html_search_regex(
              r'<span[^>]+class="[^"]*list-playlist-title[^"]*"[^>]*>(.*?)</span>',
              profile, 'playlist title')
  
          entries = OnDemandPagedList(
              functools.partial(
                  self._tracks_page_func,
                  '%s/playlists/%s' % (user_id, playlist_id), video_id, 'tracklist'),
              self._PAGE_SIZE)
  
          return self.playlist_result(entries, video_id, playlist_title, description)
  
  
  class MixcloudStreamIE(MixcloudPlaylistBaseIE):
      _VALID_URL = r'^(?:https?://)?(?:www\.)?mixcloud\.com/(?P<id>[^/]+)/stream/?$'
      IE_NAME = 'mixcloud:stream'
  
      _TEST = {
          'url': 'https://www.mixcloud.com/FirstEar/stream/',
          'info_dict': {
              'id': 'FirstEar',
              'title': 'First Ear',
              'description': 'Curators of good music\nfirstearmusic.com',
          },
          'playlist_mincount': 192,
      }
  
      def _real_extract(self, url):
          user_id = self._match_id(url)
  
          webpage = self._download_webpage(url, user_id)
  
          entries = []
          prev_page_url = None
  
          def _handle_page(page):
              entries.extend(self._find_urls_in_page(page))
              return self._search_regex(
                  r'm-next-page-url="([^"]+)"', page,
                  'next page URL', default=None)
  
          next_page_url = _handle_page(webpage)
  
          for idx in itertools.count(0):
              if not next_page_url or prev_page_url == next_page_url:
                  break
  
              prev_page_url = next_page_url
              current_page = int(self._search_regex(
                  r'\?page=(\d+)', next_page_url, 'next page number'))
  
              next_page_url = _handle_page(self._fetch_tracks_page(
                  '%s/stream' % user_id, user_id, 'stream', idx,
                  real_page_number=current_page))
  
          username = self._og_search_title(webpage)
          description = self._get_user_description(webpage)
  
          return self.playlist_result(entries, user_id, username, description)
  