_ Git - youtube-dl/blob - youtube_dl/extractor/twitch.py

   1 from __future__ import unicode_literals
   2
   3 import itertools
   4 import re
   5
   6 from .common import InfoExtractor
   7 from ..utils import (
   8     ExtractorError,
   9     parse_iso8601,
  10 )
  11
  12
  13 class TwitchIE(InfoExtractor):
  14     # TODO: One broadcast may be split into multiple videos. The key
  15     # 'broadcast_id' is the same for all parts, and 'broadcast_part'
  16     # starts at 1 and increases. Can we treat all parts as one video?
  17     _VALID_URL = r"""(?x)^(?:http://)?(?:www\.)?twitch\.tv/
  18         (?:
  19             (?P<channelid>[^/]+)|
  20             (?:(?:[^/]+)/b/(?P<videoid>[^/]+))|
  21             (?:(?:[^/]+)/c/(?P<chapterid>[^/]+))
  22         )
  23         /?(?:\#.*)?$
  24         """
  25     _PAGE_LIMIT = 100
  26     _API_BASE = 'https://api.twitch.tv'
  27     _TESTS = [{
  28         'url': 'http://www.twitch.tv/riotgames/b/577357806',
  29         'info_dict': {
  30             'id': 'a577357806',
  31             'title': 'Worlds Semifinals - Star Horn Royal Club vs. OMG',
  32         },
  33         'playlist_mincount': 12,
  34     }, {
  35         'url': 'http://www.twitch.tv/acracingleague/c/5285812',
  36         'info_dict': {
  37             'id': 'c5285812',
  38             'title': 'ACRL Off Season - Sports Cars @ Nordschleife',
  39         },
  40         'playlist_mincount': 3,
  41     }, {
  42         'url': 'http://www.twitch.tv/vanillatv',
  43         'info_dict': {
  44             'id': 'vanillatv',
  45             'title': 'VanillaTV',
  46         },
  47         'playlist_mincount': 412,
  48     }]
  49
  50     def _handle_error(self, response):
  51         if not isinstance(response, dict):
  52             return
  53         error = response.get('error')
  54         if error:
  55             raise ExtractorError(
  56                 '%s returned error: %s - %s' % (self.IE_NAME, error, response.get('message')),
  57                 expected=True)
  58
  59     def _download_json(self, url, video_id, note='Downloading JSON metadata'):
  60         response = super(TwitchIE, self)._download_json(url, video_id, note)
  61         self._handle_error(response)
  62         return response
  63
  64     def _extract_media(self, item, item_id):
  65         ITEMS = {
  66             'a': 'video',
  67             'c': 'chapter',
  68         }
  69         info = self._extract_info(self._download_json(
  70             '%s/kraken/videos/%s%s' % (self._API_BASE, item, item_id), item_id,
  71             'Downloading %s info JSON' % ITEMS[item]))
  72         response = self._download_json(
  73             '%s/api/videos/%s%s' % (self._API_BASE, item, item_id), item_id,
  74             'Downloading %s playlist JSON' % ITEMS[item])
  75         entries = []
  76         chunks = response['chunks']
  77         qualities = list(chunks.keys())
  78         for num, fragment in enumerate(zip(*chunks.values()), start=1):
  79             formats = []
  80             for fmt_num, fragment_fmt in enumerate(fragment):
  81                 format_id = qualities[fmt_num]
  82                 fmt = {
  83                     'url': fragment_fmt['url'],
  84                     'format_id': format_id,
  85                     'quality': 1 if format_id == 'live' else 0,
  86                 }
  87                 m = re.search(r'^(?P<height>\d+)[Pp]', format_id)
  88                 if m:
  89                     fmt['height'] = int(m.group('height'))
  90                 formats.append(fmt)
  91             self._sort_formats(formats)
  92             entry = dict(info)
  93             entry['id'] = '%s_%d' % (entry['id'], num)
  94             entry['title'] = '%s part %d' % (entry['title'], num)
  95             entry['formats'] = formats
  96             entries.append(entry)
  97         return self.playlist_result(entries, info['id'], info['title'])
  98
  99     def _extract_info(self, info):
 100         return {
 101             'id': info['_id'],
 102             'title': info['title'],
 103             'description': info['description'],
 104             'duration': info['length'],
 105             'thumbnail': info['preview'],
 106             'uploader': info['channel']['display_name'],
 107             'uploader_id': info['channel']['name'],
 108             'timestamp': parse_iso8601(info['recorded_at']),
 109             'view_count': info['views'],
 110         }
 111
 112     def _real_extract(self, url):
 113         mobj = re.match(self._VALID_URL, url)
 114         if mobj.group('chapterid'):
 115             return self._extract_media('c', mobj.group('chapterid'))
 116
 117             """
 118             webpage = self._download_webpage(url, chapter_id)
 119             m = re.search(r'PP\.archive_id = "([0-9]+)";', webpage)
 120             if not m:
 121                 raise ExtractorError('Cannot find archive of a chapter')
 122             archive_id = m.group(1)
 123
 124             api = api_base + '/broadcast/by_chapter/%s.xml' % chapter_id
 125             doc = self._download_xml(
 126                 api, chapter_id,
 127                 note='Downloading chapter information',
 128                 errnote='Chapter information download failed')
 129             for a in doc.findall('.//archive'):
 130                 if archive_id == a.find('./id').text:
 131                     break
 132             else:
 133                 raise ExtractorError('Could not find chapter in chapter information')
 134
 135             video_url = a.find('./video_file_url').text
 136             video_ext = video_url.rpartition('.')[2] or 'flv'
 137
 138             chapter_api_url = 'https://api.twitch.tv/kraken/videos/c' + chapter_id
 139             chapter_info = self._download_json(
 140                 chapter_api_url, 'c' + chapter_id,
 141                 note='Downloading chapter metadata',
 142                 errnote='Download of chapter metadata failed')
 143
 144             bracket_start = int(doc.find('.//bracket_start').text)
 145             bracket_end = int(doc.find('.//bracket_end').text)
 146
 147             # TODO determine start (and probably fix up file)
 148             #  youtube-dl -v http://www.twitch.tv/firmbelief/c/1757457
 149             #video_url += '?start=' + TODO:start_timestamp
 150             # bracket_start is 13290, but we want 51670615
 151             self._downloader.report_warning('Chapter detected, but we can just download the whole file. '
 152                                             'Chapter starts at %s and ends at %s' % (formatSeconds(bracket_start), formatSeconds(bracket_end)))
 153
 154             info = {
 155                 'id': 'c' + chapter_id,
 156                 'url': video_url,
 157                 'ext': video_ext,
 158                 'title': chapter_info['title'],
 159                 'thumbnail': chapter_info['preview'],
 160                 'description': chapter_info['description'],
 161                 'uploader': chapter_info['channel']['display_name'],
 162                 'uploader_id': chapter_info['channel']['name'],
 163             }
 164             return info
 165             """
 166         elif mobj.group('videoid'):
 167             return self._extract_media('a', mobj.group('videoid'))
 168         elif mobj.group('channelid'):
 169             channel_id = mobj.group('channelid')
 170             info = self._download_json(
 171                 '%s/kraken/channels/%s' % (self._API_BASE, channel_id),
 172                 channel_id, 'Downloading channel info JSON')
 173             channel_name = info.get('display_name') or info.get('name')
 174             entries = []
 175             offset = 0
 176             limit = self._PAGE_LIMIT
 177             for counter in itertools.count(1):
 178                 response = self._download_json(
 179                     '%s/kraken/channels/%s/videos/?offset=%d&limit=%d'
 180                     % (self._API_BASE, channel_id, offset, limit),
 181                     channel_id, 'Downloading channel videos JSON page %d' % counter)
 182                 videos = response['videos']
 183                 if not videos:
 184                     break
 185                 entries.extend([self.url_result(video['url'], 'Twitch') for video in videos])
 186                 offset += limit
 187             return self.playlist_result(entries, channel_id, channel_name)