[bilibili] Fix extraction (closes #10375)
Thanks @gdkchan for the algorithm
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					 2 changed files with 36 additions and 63 deletions
				
			
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			@ -1,6 +1,7 @@
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version <unreleased>
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Extractors
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* [bilibili] Fix extraction (#10375)
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* [openload] Fix extraction (#10408)
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			@ -1,35 +1,26 @@
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# coding: utf-8
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from __future__ import unicode_literals
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import calendar
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import datetime
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import hashlib
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import re
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from .common import InfoExtractor
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from ..compat import (
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    compat_etree_fromstring,
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    compat_str,
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    compat_parse_qs,
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    compat_xml_parse_error,
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)
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from ..compat import compat_parse_qs
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from ..utils import (
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    ExtractorError,
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    int_or_none,
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    float_or_none,
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    xpath_text,
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    unified_timestamp,
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)
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class BiliBiliIE(InfoExtractor):
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    _WORKING = False
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    _VALID_URL = r'https?://www\.bilibili\.(?:tv|com)/video/av(?P<id>\d+)'
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    _TESTS = [{
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        'url': 'http://www.bilibili.tv/video/av1074402/',
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        'md5': '9fa226fe2b8a9a4d5a69b4c6a183417e',
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        'info_dict': {
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            'id': '1554319',
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            'id': '1074402',
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            'ext': 'mp4',
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            'title': '【金坷垃】金泡沫',
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            'description': 'md5:ce18c2a2d2193f0df2917d270f2e5923',
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			@ -43,24 +34,28 @@ class BiliBiliIE(InfoExtractor):
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    }, {
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        'url': 'http://www.bilibili.com/video/av1041170/',
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        'info_dict': {
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            'id': '1507019',
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            'id': '1041170',
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            'ext': 'mp4',
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            'title': '【BD1080P】刀语【诸神&异域】',
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            'description': '这是个神奇的故事~每个人不留弹幕不给走哦~切利哦!~',
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            'duration': 3382.259,
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            'timestamp': 1396530060,
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            'upload_date': '20140403',
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            'thumbnail': 're:^https?://.+\.jpg',
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            'uploader': '枫叶逝去',
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            'uploader_id': '520116',
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        },
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    }, {
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        'url': 'http://www.bilibili.com/video/av4808130/',
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        'info_dict': {
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            'id': '7802182',
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            'id': '4808130',
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            'ext': 'mp4',
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            'title': '【长篇】哆啦A梦443【钉铛】',
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            'description': '(2016.05.27)来组合客人的脸吧&amp;寻母六千里锭 抱歉,又轮到周日上班现在才到家 封面www.pixiv.net/member_illust.php?mode=medium&amp;illust_id=56912929',
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            'duration': 1493.995,
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            'timestamp': 1464564180,
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            'upload_date': '20160529',
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            'thumbnail': 're:^https?://.+\.jpg',
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            'uploader': '喜欢拉面',
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            'uploader_id': '151066',
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        },
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			@ -68,12 +63,14 @@ class BiliBiliIE(InfoExtractor):
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        # Missing upload time
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        'url': 'http://www.bilibili.com/video/av1867637/',
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        'info_dict': {
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            'id': '2880301',
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            'id': '1867637',
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            'ext': 'mp4',
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            'title': '【HDTV】【喜剧】岳父岳母真难当 (2014)【法国票房冠军】',
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            'description': '一个信奉天主教的法国旧式传统资产阶级家庭中有四个女儿。三个女儿却分别找了阿拉伯、犹太、中国丈夫,老夫老妻唯独期盼剩下未嫁的小女儿能找一个信奉天主教的法国白人,结果没想到小女儿找了一位非裔黑人……【这次应该不会跳帧了】',
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            'duration': 5760.0,
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            'uploader': '黑夜为猫',
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            'uploader_id': '610729',
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            'thumbnail': 're:^https?://.+\.jpg',
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        },
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        'params': {
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            # Just to test metadata extraction
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			@ -82,86 +79,61 @@ class BiliBiliIE(InfoExtractor):
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        'expected_warnings': ['upload time'],
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    }]
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    # BiliBili blocks keys from time to time. The current key is extracted from
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    # the Android client
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    # TODO: find the sign algorithm used in the flash player
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    _APP_KEY = '86385cdc024c0f6c'
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    _APP_KEY = '6f90a59ac58a4123'
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    _BILIBILI_KEY = '0bfd84cc3940035173f35e6777508326'
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    def _real_extract(self, url):
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        mobj = re.match(self._VALID_URL, url)
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        video_id = mobj.group('id')
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        video_id = self._match_id(url)
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        webpage = self._download_webpage(url, video_id)
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        params = compat_parse_qs(self._search_regex(
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        cid = compat_parse_qs(self._search_regex(
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            [r'EmbedPlayer\([^)]+,\s*"([^"]+)"\)',
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             r'<iframe[^>]+src="https://secure\.bilibili\.com/secure,([^"]+)"'],
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            webpage, 'player parameters'))
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        cid = params['cid'][0]
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            webpage, 'player parameters'))['cid'][0]
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        info_xml_str = self._download_webpage(
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            'http://interface.bilibili.com/v_cdn_play',
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            cid, query={'appkey': self._APP_KEY, 'cid': cid},
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            note='Downloading video info page')
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        payload = 'appkey=%s&cid=%s&otype=json&quality=2&type=mp4' % (self._APP_KEY, cid)
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        sign = hashlib.md5((payload + self._BILIBILI_KEY).encode('utf-8')).hexdigest()
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        err_msg = None
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        durls = None
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        info_xml = None
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        try:
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            info_xml = compat_etree_fromstring(info_xml_str.encode('utf-8'))
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        except compat_xml_parse_error:
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            info_json = self._parse_json(info_xml_str, video_id, fatal=False)
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            err_msg = (info_json or {}).get('error_text')
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        else:
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            err_msg = xpath_text(info_xml, './message')
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        if info_xml is not None:
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            durls = info_xml.findall('./durl')
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        if not durls:
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            if err_msg:
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                raise ExtractorError('%s said: %s' % (self.IE_NAME, err_msg), expected=True)
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            else:
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                raise ExtractorError('No videos found!')
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        video_info = self._download_json(
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            'http://interface.bilibili.com/playurl?%s&sign=%s' % (payload, sign),
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            video_id, note='Downloading video info page')
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        entries = []
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        for durl in durls:
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            size = xpath_text(durl, ['./filesize', './size'])
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        for idx, durl in enumerate(video_info['durl']):
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            formats = [{
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                'url': durl.find('./url').text,
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                'filesize': int_or_none(size),
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                'url': durl['url'],
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                'filesize': int_or_none(durl['size']),
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            }]
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            for backup_url in durl.findall('./backup_url/url'):
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            for backup_url in durl['backup_url']:
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                formats.append({
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                    'url': backup_url.text,
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                    'url': backup_url,
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                    # backup URLs have lower priorities
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                    'preference': -2 if 'hd.mp4' in backup_url.text else -3,
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                    'preference': -2 if 'hd.mp4' in backup_url else -3,
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                })
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            self._sort_formats(formats)
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            entries.append({
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                'id': '%s_part%s' % (cid, xpath_text(durl, './order')),
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                'duration': int_or_none(xpath_text(durl, './length'), 1000),
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                'id': '%s_part%s' % (video_id, idx),
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                'duration': float_or_none(durl.get('length'), 1000),
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                'formats': formats,
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            })
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        title = self._html_search_regex('<h1[^>]+title="([^"]+)">', webpage, 'title')
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        description = self._html_search_meta('description', webpage)
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        datetime_str = self._html_search_regex(
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            r'<time[^>]+datetime="([^"]+)"', webpage, 'upload time', fatal=False)
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        timestamp = None
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        if datetime_str:
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            timestamp = calendar.timegm(datetime.datetime.strptime(datetime_str, '%Y-%m-%dT%H:%M').timetuple())
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        timestamp = unified_timestamp(self._html_search_regex(
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            r'<time[^>]+datetime="([^"]+)"', webpage, 'upload time', fatal=False))
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        # TODO 'view_count' requires deobfuscating Javascript
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        info = {
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            'id': compat_str(cid),
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            'id': video_id,
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            'title': title,
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            'description': description,
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            'timestamp': timestamp,
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            'thumbnail': self._html_search_meta('thumbnailUrl', webpage),
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            'duration': float_or_none(xpath_text(info_xml, './timelength'), scale=1000),
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            'duration': float_or_none(video_info.get('timelength'), scale=1000),
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        }
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        uploader_mobj = re.search(
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