[twitch] Rename extractor and support channel videos
This commit is contained in:
Sergey M․
176
youtube_dl/extractor/twitch.py
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176
youtube_dl/extractor/twitch.py
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from __future__ import unicode_literals
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import itertools
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import re
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from .common import InfoExtractor
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from ..utils import (
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ExtractorError,
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parse_iso8601,
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)
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class TwitchIE(InfoExtractor):
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# TODO: One broadcast may be split into multiple videos. The key
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# 'broadcast_id' is the same for all parts, and 'broadcast_part'
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# starts at 1 and increases. Can we treat all parts as one video?
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_VALID_URL = r"""(?x)^(?:http://)?(?:www\.)?twitch\.tv/
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(?:
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(?P<channelid>[^/]+)|
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(?:(?:[^/]+)/b/(?P<videoid>[^/]+))|
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(?:(?:[^/]+)/c/(?P<chapterid>[^/]+))
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)
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/?(?:\#.*)?$
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"""
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_PAGE_LIMIT = 100
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_API_BASE = 'https://api.twitch.tv'
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_TEST = {
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'url': 'http://www.twitch.tv/thegamedevhub/b/296128360',
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'md5': 'ecaa8a790c22a40770901460af191c9a',
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'info_dict': {
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'id': '296128360',
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'ext': 'flv',
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'upload_date': '20110927',
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'uploader_id': 25114803,
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'uploader': 'thegamedevhub',
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'title': 'Beginner Series - Scripting With Python Pt.1'
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}
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}
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def _handle_error(self, response):
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if not isinstance(response, dict):
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return
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error = response.get('error')
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if error:
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raise ExtractorError(
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'%s returned error: %s - %s' % (self.IE_NAME, error, response.get('message')),
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expected=True)
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def _download_json(self, url, video_id, note='Downloading JSON metadata'):
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response = super(TwitchIE, self)._download_json(url, video_id, note)
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self._handle_error(response)
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return response
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def _extract_media(self, item, item_id):
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ITEMS = {
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'a': 'video',
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'c': 'chapter',
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}
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info = self._extract_info(self._download_json(
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'%s/kraken/videos/%s%s' % (self._API_BASE, item, item_id), item_id,
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'Downloading %s info JSON' % ITEMS[item]))
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response = self._download_json(
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'%s/api/videos/%s%s' % (self._API_BASE, item, item_id), item_id,
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'Downloading %s playlist JSON' % ITEMS[item])
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entries = []
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chunks = response['chunks']
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qualities = list(chunks.keys())
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for num, fragment in enumerate(zip(*chunks.values()), start=1):
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formats = []
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for fmt_num, fragment_fmt in enumerate(fragment):
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format_id = qualities[fmt_num]
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fmt = {
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'url': fragment_fmt['url'],
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'format_id': format_id,
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'quality': 1 if format_id == 'live' else 0,
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}
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m = re.search(r'^(?P<height>\d+)[Pp]', format_id)
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if m:
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fmt['height'] = int(m.group('height'))
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formats.append(fmt)
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self._sort_formats(formats)
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entry = dict(info)
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entry['title'] = '%s part %d' % (entry['title'], num)
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entry['formats'] = formats
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entries.append(entry)
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return entries
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def _extract_info(self, info):
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return {
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'id': info['_id'],
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'title': info['title'],
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'description': info['description'],
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'duration': info['length'],
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'thumbnail': info['preview'],
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'uploader': info['channel']['display_name'],
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'uploader_id': info['channel']['name'],
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'timestamp': parse_iso8601(info['recorded_at']),
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'view_count': info['views'],
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}
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def _real_extract(self, url):
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mobj = re.match(self._VALID_URL, url)
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if mobj.group('chapterid'):
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return self._extract_media('c', mobj.group('chapterid'))
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"""
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webpage = self._download_webpage(url, chapter_id)
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m = re.search(r'PP\.archive_id = "([0-9]+)";', webpage)
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if not m:
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raise ExtractorError('Cannot find archive of a chapter')
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archive_id = m.group(1)
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api = api_base + '/broadcast/by_chapter/%s.xml' % chapter_id
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doc = self._download_xml(
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api, chapter_id,
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note='Downloading chapter information',
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errnote='Chapter information download failed')
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for a in doc.findall('.//archive'):
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if archive_id == a.find('./id').text:
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break
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else:
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raise ExtractorError('Could not find chapter in chapter information')
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video_url = a.find('./video_file_url').text
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video_ext = video_url.rpartition('.')[2] or 'flv'
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chapter_api_url = 'https://api.twitch.tv/kraken/videos/c' + chapter_id
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chapter_info = self._download_json(
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chapter_api_url, 'c' + chapter_id,
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note='Downloading chapter metadata',
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errnote='Download of chapter metadata failed')
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bracket_start = int(doc.find('.//bracket_start').text)
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bracket_end = int(doc.find('.//bracket_end').text)
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# TODO determine start (and probably fix up file)
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# youtube-dl -v http://www.twitch.tv/firmbelief/c/1757457
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#video_url += '?start=' + TODO:start_timestamp
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# bracket_start is 13290, but we want 51670615
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self._downloader.report_warning('Chapter detected, but we can just download the whole file. '
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'Chapter starts at %s and ends at %s' % (formatSeconds(bracket_start), formatSeconds(bracket_end)))
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info = {
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'id': 'c' + chapter_id,
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'url': video_url,
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'ext': video_ext,
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'title': chapter_info['title'],
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'thumbnail': chapter_info['preview'],
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'description': chapter_info['description'],
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'uploader': chapter_info['channel']['display_name'],
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'uploader_id': chapter_info['channel']['name'],
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}
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return info
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"""
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elif mobj.group('videoid'):
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return self._extract_media('a', mobj.group('videoid'))
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elif mobj.group('channelid'):
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channel_id = mobj.group('channelid')
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info = self._download_json(
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'%s/kraken/channels/%s' % (self._API_BASE, channel_id),
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channel_id, 'Downloading channel info JSON')
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channel_name = info.get('display_name') or info.get('name')
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entries = []
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offset = 0
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limit = self._PAGE_LIMIT
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for counter in itertools.count(1):
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response = self._download_json(
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'%s/kraken/channels/%s/videos/?offset=%d&limit=%d'
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% (self._API_BASE, channel_id, offset, limit),
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channel_id, 'Downloading channel videos JSON page %d' % counter)
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videos = response['videos']
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if not videos:
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break
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entries.extend([self.url_result(video['url'], 'Twitch') for video in videos])
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offset += limit
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return self.playlist_result(entries, channel_id, channel_name)
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