Philipp Hagemeister
11 years ago
2 changed files with 145 additions and 132 deletions
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import json |
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import os |
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import re |
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import xml.etree.ElementTree |
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from .common import InfoExtractor |
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from ..utils import ( |
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ExtractorError, |
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formatSeconds, |
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) |
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class JustinTVIE(InfoExtractor): |
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"""Information extractor for justin.tv and twitch.tv""" |
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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|justin)\.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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_JUSTIN_PAGE_LIMIT = 100 |
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IE_NAME = u'justin.tv' |
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def report_download_page(self, channel, offset): |
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"""Report attempt to download a single page of videos.""" |
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self.to_screen(u'%s: Downloading video information from %d to %d' % |
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(channel, offset, offset + self._JUSTIN_PAGE_LIMIT)) |
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# Return count of items, list of *valid* items |
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def _parse_page(self, url, video_id): |
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webpage = self._download_webpage(url, video_id, |
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u'Downloading video info JSON', |
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u'unable to download video info JSON') |
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response = json.loads(webpage) |
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if type(response) != list: |
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error_text = response.get('error', 'unknown error') |
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raise ExtractorError(u'Justin.tv API: %s' % error_text) |
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info = [] |
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for clip in response: |
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video_url = clip['video_file_url'] |
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if video_url: |
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video_extension = os.path.splitext(video_url)[1][1:] |
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video_date = re.sub('-', '', clip['start_time'][:10]) |
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video_uploader_id = clip.get('user_id', clip.get('channel_id')) |
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video_id = clip['id'] |
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video_title = clip.get('title', video_id) |
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info.append({ |
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'id': video_id, |
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'url': video_url, |
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'title': video_title, |
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'uploader': clip.get('channel_name', video_uploader_id), |
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'uploader_id': video_uploader_id, |
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'upload_date': video_date, |
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'ext': video_extension, |
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}) |
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return (len(response), info) |
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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 is None: |
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raise ExtractorError(u'invalid URL: %s' % url) |
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api_base = 'http://api.justin.tv' |
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paged = False |
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if mobj.group('channelid'): |
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paged = True |
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video_id = mobj.group('channelid') |
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api = api_base + '/channel/archives/%s.json' % video_id |
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elif mobj.group('chapterid'): |
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chapter_id = mobj.group('chapterid') |
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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(u'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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chapter_info_xml = self._download_webpage(api, chapter_id, |
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note=u'Downloading chapter information', |
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errnote=u'Chapter information download failed') |
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doc = xml.etree.ElementTree.fromstring(chapter_info_xml) |
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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(u'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 u'flv' |
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chapter_api_url = u'https://api.twitch.tv/kraken/videos/c' + chapter_id |
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chapter_info_json = self._download_webpage(chapter_api_url, u'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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chapter_info = json.loads(chapter_info_json) |
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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 += u'?start=' + TODO:start_timestamp |
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# bracket_start is 13290, but we want 51670615 |
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self._downloader.report_warning(u'Chapter detected, but we can just download the whole file. ' |
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u'Chapter starts at %s and ends at %s' % (formatSeconds(bracket_start), formatSeconds(bracket_end))) |
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info = { |
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'id': u'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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else: |
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video_id = mobj.group('videoid') |
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api = api_base + '/broadcast/by_archive/%s.json' % video_id |
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self.report_extraction(video_id) |
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info = [] |
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offset = 0 |
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limit = self._JUSTIN_PAGE_LIMIT |
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while True: |
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if paged: |
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self.report_download_page(video_id, offset) |
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page_url = api + ('?offset=%d&limit=%d' % (offset, limit)) |
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page_count, page_info = self._parse_page(page_url, video_id) |
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info.extend(page_info) |
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if not paged or page_count != limit: |
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break |
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offset += limit |
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return info |
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