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youtube-dl/youtube_dl/extractor/youku.py

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2013-06-23 20:01:02 +00:00
import json
import math
import random
import re
import time
from .common import InfoExtractor
from ..utils import (
ExtractorError,
)
class YoukuIE(InfoExtractor):
_VALID_URL = r'(?:http://)?v\.youku\.com/v_show/id_(?P<ID>[A-Za-z0-9]+)\.html'
def _gen_sid(self):
nowTime = int(time.time() * 1000)
random1 = random.randint(1000,1998)
random2 = random.randint(1000,9999)
return "%d%d%d" %(nowTime,random1,random2)
def _get_file_ID_mix_string(self, seed):
mixed = []
source = list("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/\:._-1234567890")
seed = float(seed)
for i in range(len(source)):
seed = (seed * 211 + 30031 ) % 65536
index = math.floor(seed / 65536 * len(source) )
mixed.append(source[int(index)])
source.remove(source[int(index)])
#return ''.join(mixed)
return mixed
def _get_file_id(self, fileId, seed):
mixed = self._get_file_ID_mix_string(seed)
ids = fileId.split('*')
realId = []
for ch in ids:
if ch:
realId.append(mixed[int(ch)])
return ''.join(realId)
def _real_extract(self, url):
mobj = re.match(self._VALID_URL, url)
if mobj is None:
raise ExtractorError(u'Invalid URL: %s' % url)
video_id = mobj.group('ID')
info_url = 'http://v.youku.com/player/getPlayList/VideoIDS/' + video_id
jsondata = self._download_webpage(info_url, video_id)
self.report_extraction(video_id)
try:
config = json.loads(jsondata)
video_title = config['data'][0]['title']
seed = config['data'][0]['seed']
format = self._downloader.params.get('format', None)
supported_format = list(config['data'][0]['streamfileids'].keys())
if format is None or format == 'best':
if 'hd2' in supported_format:
format = 'hd2'
else:
format = 'flv'
ext = u'flv'
elif format == 'worst':
format = 'mp4'
ext = u'mp4'
else:
format = 'flv'
ext = u'flv'
fileid = config['data'][0]['streamfileids'][format]
keys = [s['k'] for s in config['data'][0]['segs'][format]]
except (UnicodeDecodeError, ValueError, KeyError):
raise ExtractorError(u'Unable to extract info section')
files_info=[]
sid = self._gen_sid()
fileid = self._get_file_id(fileid, seed)
#column 8,9 of fileid represent the segment number
#fileid[7:9] should be changed
for index, key in enumerate(keys):
temp_fileid = '%s%02X%s' % (fileid[0:8], index, fileid[10:])
download_url = 'http://f.youku.com/player/getFlvPath/sid/%s_%02X/st/flv/fileid/%s?k=%s' % (sid, index, temp_fileid, key)
info = {
'id': '%s_part%02d' % (video_id, index),
'url': download_url,
'uploader': None,
'upload_date': None,
'title': video_title,
'ext': ext,
}
files_info.append(info)
return files_info