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from __future__ import unicode_literals
import itertools
import json
import os
import re
from .common import InfoExtractor
from ..utils import (
compat_str,
ExtractorError,
formatSeconds,
parse_iso8601,
)
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 = 'justin.tv'
IE_DESC = 'justin.tv and twitch.tv'
_TEST = {
'url': 'http://www.twitch.tv/thegamedevhub/b/296128360',
'md5': 'ecaa8a790c22a40770901460af191c9a',
'info_dict': {
'id': '296128360',
'ext': 'flv',
'upload_date': '20110927',
'uploader_id': 25114803,
'uploader': 'thegamedevhub',
'title': 'Beginner Series - Scripting With Python Pt.1'
}
}
_API_BASE = 'https://api.twitch.tv'
# Return count of items, list of *valid* items
def _parse_page(self, url, video_id, counter):
info_json = self._download_webpage(
url, video_id,
'Downloading video info JSON on page %d' % counter,
'Unable to download video info JSON %d' % counter)
response = json.loads(info_json)
if type(response) != list:
error_text = response.get('error', 'unknown error')
raise ExtractorError('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': compat_str(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 _handle_error(self, response):
if not isinstance(response, dict):
return
error = response.get('error')
if error:
raise ExtractorError(
'%s returned error: %s - %s' % (self.IE_NAME, error, response.get('message')),
expected=True)
def _download_json(self, url, video_id, note='Downloading JSON metadata'):
response = super(JustinTVIE, self)._download_json(url, video_id, note)
self._handle_error(response)
return response
def _extract_media(self, item, item_id):
ITEMS = {
'a': 'video',
'c': 'chapter',
}
info = self._extract_info(self._download_json(
'%s/kraken/videos/%s%s' % (self._API_BASE, item, item_id), item_id,
'Downloading %s info JSON' % ITEMS[item]))
response = self._download_json(
'%s/api/videos/%s%s' % (self._API_BASE, item, item_id), item_id,
'Downloading %s playlist JSON' % ITEMS[item])
entries = []
chunks = response['chunks']
qualities = list(chunks.keys())
for num, fragment in enumerate(zip(*chunks.values()), start=1):
formats = []
for fmt_num, fragment_fmt in enumerate(fragment):
format_id = qualities[fmt_num]
fmt = {
'url': fragment_fmt['url'],
'format_id': format_id,
'quality': 1 if format_id == 'live' else 0,
}
m = re.search(r'^(?P<height>\d+)[Pp]', format_id)
if m:
fmt['height'] = int(m.group('height'))
formats.append(fmt)
self._sort_formats(formats)
entry = dict(info)
entry['title'] = '%s part %d' % (entry['title'], num)
entry['formats'] = formats
entries.append(entry)
return entries
def _extract_info(self, info):
return {
'id': info['_id'],
'title': info['title'],
'description': info['description'],
'duration': info['length'],
'thumbnail': info['preview'],
'uploader': info['channel']['display_name'],
'uploader_id': info['channel']['name'],
'timestamp': parse_iso8601(info['recorded_at']),
'view_count': info['views'],
}
def _real_extract(self, url):
mobj = re.match(self._VALID_URL, url)
api_base = 'http://api.twitch.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'):
return self._extract_media('c', 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('Cannot find archive of a chapter')
archive_id = m.group(1)
api = api_base + '/broadcast/by_chapter/%s.xml' % chapter_id
doc = self._download_xml(
api, chapter_id,
note='Downloading chapter information',
errnote='Chapter information download failed')
for a in doc.findall('.//archive'):
if archive_id == a.find('./id').text:
break
else:
raise ExtractorError('Could not find chapter in chapter information')
video_url = a.find('./video_file_url').text
video_ext = video_url.rpartition('.')[2] or 'flv'
chapter_api_url = 'https://api.twitch.tv/kraken/videos/c' + chapter_id
chapter_info = self._download_json(
chapter_api_url, 'c' + chapter_id,
note='Downloading chapter metadata',
errnote='Download of chapter metadata failed')
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 += '?start=' + TODO:start_timestamp
# bracket_start is 13290, but we want 51670615
self._downloader.report_warning('Chapter detected, but we can just download the whole file. '
'Chapter starts at %s and ends at %s' % (formatSeconds(bracket_start), formatSeconds(bracket_end)))
info = {
'id': '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:
return self._extract_media('a', mobj.group('videoid'))
entries = []
offset = 0
limit = self._JUSTIN_PAGE_LIMIT
for counter in itertools.count(1):
page_url = api + ('?offset=%d&limit=%d' % (offset, limit))
page_count, page_info = self._parse_page(
page_url, video_id, counter)
entries.extend(page_info)
if not paged or page_count != limit:
break
offset += limit
return {
'_type': 'playlist',
'id': video_id,
'entries': entries,
}
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