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import json
import os
import re
import xml.etree.ElementTree
from .common import InfoExtractor
from ..utils import (
ExtractorError,
formatSeconds,
)
class JustinTVIE(InfoExtractor):
"""Information extractor for justin.tv and twitch.tv"""
# TODO: One broadcast may be split into multiple videos. The key
# 'broadcast_id' is the same for all parts, and 'broadcast_part'
# starts at 1 and increases. Can we treat all parts as one video?
_VALID_URL = r"""(?x)^(?:http://)?(?:www\.)?(?:twitch|justin)\.tv/
(?:
(?P<channelid>[^/]+)|
(?:(?:[^/]+)/b/(?P<videoid>[^/]+))|
(?:(?:[^/]+)/c/(?P<chapterid>[^/]+))
)
/?(?:\#.*)?$
"""
_JUSTIN_PAGE_LIMIT = 100
IE_NAME = u'justin.tv'
def report_download_page(self, channel, offset):
"""Report attempt to download a single page of videos."""
self.to_screen(u'%s: Downloading video information from %d to %d' %
(channel, offset, offset + self._JUSTIN_PAGE_LIMIT))
# Return count of items, list of *valid* items
def _parse_page(self, url, video_id):
webpage = self._download_webpage(url, video_id,
u'Downloading video info JSON',
u'unable to download video info JSON')
response = json.loads(webpage)
if type(response) != list:
error_text = response.get('error', 'unknown error')
raise ExtractorError(u'Justin.tv API: %s' % error_text)
info = []
for clip in response:
video_url = clip['video_file_url']
if video_url:
video_extension = os.path.splitext(video_url)[1][1:]
video_date = re.sub('-', '', clip['start_time'][:10])
video_uploader_id = clip.get('user_id', clip.get('channel_id'))
video_id = clip['id']
video_title = clip.get('title', video_id)
info.append({
'id': video_id,
'url': video_url,
'title': video_title,
'uploader': clip.get('channel_name', video_uploader_id),
'uploader_id': video_uploader_id,
'upload_date': video_date,
'ext': video_extension,
})
return (len(response), info)
def _real_extract(self, url):
mobj = re.match(self._VALID_URL, url)
if mobj is None:
raise ExtractorError(u'invalid URL: %s' % url)
api_base = 'http://api.justin.tv'
paged = False
if mobj.group('channelid'):
paged = True
video_id = mobj.group('channelid')
api = api_base + '/channel/archives/%s.json' % video_id
elif mobj.group('chapterid'):
chapter_id = mobj.group('chapterid')
webpage = self._download_webpage(url, chapter_id)
m = re.search(r'PP\.archive_id = "([0-9]+)";', webpage)
if not m:
raise ExtractorError(u'Cannot find archive of a chapter')
archive_id = m.group(1)
api = api_base + '/broadcast/by_chapter/%s.xml' % chapter_id
chapter_info_xml = self._download_webpage(api, chapter_id,
note=u'Downloading chapter information',
errnote=u'Chapter information download failed')
doc = xml.etree.ElementTree.fromstring(chapter_info_xml)
for a in doc.findall('.//archive'):
if archive_id == a.find('./id').text:
break
else:
raise ExtractorError(u'Could not find chapter in chapter information')
video_url = a.find('./video_file_url').text
video_ext = video_url.rpartition('.')[2] or u'flv'
chapter_api_url = u'https://api.twitch.tv/kraken/videos/c' + chapter_id
chapter_info_json = self._download_webpage(chapter_api_url, u'c' + chapter_id,
note='Downloading chapter metadata',
errnote='Download of chapter metadata failed')
chapter_info = json.loads(chapter_info_json)
bracket_start = int(doc.find('.//bracket_start').text)
bracket_end = int(doc.find('.//bracket_end').text)
# TODO determine start (and probably fix up file)
# youtube-dl -v http://www.twitch.tv/firmbelief/c/1757457
#video_url += u'?start=' + TODO:start_timestamp
# bracket_start is 13290, but we want 51670615
self._downloader.report_warning(u'Chapter detected, but we can just download the whole file. '
u'Chapter starts at %s and ends at %s' % (formatSeconds(bracket_start), formatSeconds(bracket_end)))
info = {
'id': u'c' + chapter_id,
'url': video_url,
'ext': video_ext,
'title': chapter_info['title'],
'thumbnail': chapter_info['preview'],
'description': chapter_info['description'],
'uploader': chapter_info['channel']['display_name'],
'uploader_id': chapter_info['channel']['name'],
}
return [info]
else:
video_id = mobj.group('videoid')
api = api_base + '/broadcast/by_archive/%s.json' % video_id
self.report_extraction(video_id)
info = []
offset = 0
limit = self._JUSTIN_PAGE_LIMIT
while True:
if paged:
self.report_download_page(video_id, offset)
page_url = api + ('?offset=%d&limit=%d' % (offset, limit))
page_count, page_info = self._parse_page(page_url, video_id)
info.extend(page_info)
if not paged or page_count != limit:
break
offset += limit
return info
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