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path: root/youtube_dl/extractor/mixcloud.py
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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_str,
    compat_urllib_parse_unquote,
    compat_urlparse,
)
from ..utils import (
    clean_html,
    ExtractorError,
    OnDemandPagedList,
    str_to_int,
)


class MixcloudIE(InfoExtractor):
    _VALID_URL = r'https?://(?:(?:www|beta|m)\.)?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': r're:https?://.*\.jpg',
            'view_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,
        },
    }, {
        'url': 'https://beta.mixcloud.com/RedLightRadio/nosedrip-15-red-light-radio-01-18-2016/',
        'only_matching': True,
    }]

    _keys = [
        'return { requestAnimationFrame: function(callback) { callback(); }, innerHeight: 500 };',
        'pleasedontdownloadourmusictheartistswontgetpaid',
        'window.addEventListener = window.addEventListener || function() {};',
        '(function() { return new Date().toLocaleDateString(); })()'
    ]
    _current_key = None

    # See https://www.mixcloud.com/media/js2/www_js_2.9e23256562c080482435196ca3975ab5.js
    def _decrypt_play_info(self, play_info, video_id):
        play_info = base64.b64decode(play_info.encode('ascii'))
        for num, key in enumerate(self._keys, start=1):
            try:
                return self._parse_json(
                    ''.join([
                        compat_chr(compat_ord(ch) ^ compat_ord(key[idx % len(key)]))
                        for idx, ch in enumerate(play_info)]),
                    video_id)
            except ExtractorError:
                if num == len(self._keys):
                    raise

    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)

        if not self._current_key:
            js_url = self._search_regex(
                r'<script[^>]+\bsrc=["\"](https://(?:www\.)?mixcloud\.com/media/js2/www_js_4\.[^>]+\.js)',
                webpage, 'js url', default=None)
            if js_url:
                js = self._download_webpage(js_url, track_id, fatal=False)
                if js:
                    KEY_RE_TEMPLATE = r'player\s*:\s*{.*?\b%s\s*:\s*(["\'])(?P<key>(?:(?!\1).)+)\1'
                    for key_name in ('value', 'key_value', 'key_value.*?', '.*?value.*?'):
                        key = self._search_regex(
                            KEY_RE_TEMPLATE % key_name, js, 'key',
                            default=None, group='key')
                        if key and isinstance(key, compat_str):
                            self._keys.insert(0, key)
                            self._current_key = key

        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._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']

        title = self._html_search_regex(r'm-title="([^"]+)"', webpage, 'title')
        thumbnail = self._proto_relative_url(self._html_search_regex(
            r'm-thumbnail-url="([^"]+)"', webpage, 'thumbnail', fatal=False))
        uploader = self._html_search_regex(
            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)
        view_count = str_to_int(self._search_regex(
            [r'<meta itemprop="interactionCount" content="UserPlays:([0-9]+)"',
             r'/listeners/?">([0-9,.]+)</a>',
             r'(?:m|data)-tooltip=["\']([\d,.]+) plays'],
            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,
        }


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="profile-bio"[^>]*>(.+?)</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:def36060ac8747b3aabca54924897e47',
        },
        'playlist_mincount': 11,
    }, {
        'url': 'http://www.mixcloud.com/dholbach/uploads/',
        'info_dict': {
            'id': 'dholbach_uploads',
            'title': 'Daniel Holbach (uploads)',
            'description': 'md5:def36060ac8747b3aabca54924897e47',
        },
        'playlist_mincount': 11,
    }, {
        'url': 'http://www.mixcloud.com/dholbach/favorites/',
        'info_dict': {
            'id': 'dholbach_favorites',
            'title': 'Daniel Holbach (favorites)',
            'description': 'md5:def36060ac8747b3aabca54924897e47',
        },
        '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:def36060ac8747b3aabca54924897e47',
        },
        '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/',
        'only_matching': True,
    }]

    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)

        webpage = self._download_webpage(
            url, user_id,
            note='Downloading playlist page',
            errnote='Unable to download playlist page')

        title = self._html_search_regex(
            r'<a[^>]+class="parent active"[^>]*><b>\d+</b><span[^>]*>([^<]+)',
            webpage, 'playlist title',
            default=None) or self._og_search_title(webpage, fatal=False)
        description = self._get_user_description(webpage)

        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, 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)