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[youtube-dl] / youtube_dl / extractor / youku.py
1 # coding: utf-8
2
3 import json
4 import math
5 import random
6 import re
7 import time
8
9 from .common import InfoExtractor
10 from ..utils import (
11     ExtractorError,
12 )
13
14
15 class YoukuIE(InfoExtractor):
16     _VALID_URL =  r'(?:(?:http://)?(?:v|player)\.youku\.com/(?:v_show/id_|player\.php/sid/)|youku:)(?P<ID>[A-Za-z0-9]+)(?:\.html|/v\.swf|)'
17     _TEST =   {
18         u"url": u"http://v.youku.com/v_show/id_XNDgyMDQ2NTQw.html",
19         u"file": u"XNDgyMDQ2NTQw_part00.flv",
20         u"md5": u"ffe3f2e435663dc2d1eea34faeff5b5b",
21         u"params": {u"test": False},
22         u"info_dict": {
23             u"title": u"youtube-dl test video \"'/\\ä↭𝕐"
24         }
25     }
26
27
28     def _gen_sid(self):
29         nowTime = int(time.time() * 1000)
30         random1 = random.randint(1000,1998)
31         random2 = random.randint(1000,9999)
32
33         return "%d%d%d" %(nowTime,random1,random2)
34
35     def _get_file_ID_mix_string(self, seed):
36         mixed = []
37         source = list("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/\:._-1234567890")
38         seed = float(seed)
39         for i in range(len(source)):
40             seed  =  (seed * 211 + 30031) % 65536
41             index  =  math.floor(seed / 65536 * len(source))
42             mixed.append(source[int(index)])
43             source.remove(source[int(index)])
44         #return ''.join(mixed)
45         return mixed
46
47     def _get_file_id(self, fileId, seed):
48         mixed = self._get_file_ID_mix_string(seed)
49         ids = fileId.split('*')
50         realId = []
51         for ch in ids:
52             if ch:
53                 realId.append(mixed[int(ch)])
54         return ''.join(realId)
55
56     def _real_extract(self, url):
57         mobj = re.match(self._VALID_URL, url)
58         if mobj is None:
59             raise ExtractorError(u'Invalid URL: %s' % url)
60         video_id = mobj.group('ID')
61
62         info_url = 'http://v.youku.com/player/getPlayList/VideoIDS/' + video_id
63
64         jsondata = self._download_webpage(info_url, video_id)
65
66         self.report_extraction(video_id)
67         try:
68             config = json.loads(jsondata)
69             error_code = config['data'][0].get('error_code')
70             if error_code:
71                 # -8 means blocked outside China.
72                 error = config['data'][0].get('error')  # Chinese and English, separated by newline.
73                 raise ExtractorError(error or u'Server reported error %i' % error_code,
74                     expected=True)
75
76             video_title =  config['data'][0]['title']
77             seed = config['data'][0]['seed']
78
79             format = self._downloader.params.get('format', None)
80             supported_format = list(config['data'][0]['streamfileids'].keys())
81
82             if format is None or format == 'best':
83                 if 'hd2' in supported_format:
84                     format = 'hd2'
85                 else:
86                     format = 'flv'
87                 ext = u'flv'
88             elif format == 'worst':
89                 format = 'mp4'
90                 ext = u'mp4'
91             else:
92                 format = 'flv'
93                 ext = u'flv'
94
95
96             fileid = config['data'][0]['streamfileids'][format]
97             keys = [s['k'] for s in config['data'][0]['segs'][format]]
98             # segs is usually a dictionary, but an empty *list* if an error occured.
99         except (UnicodeDecodeError, ValueError, KeyError):
100             raise ExtractorError(u'Unable to extract info section')
101
102         files_info=[]
103         sid = self._gen_sid()
104         fileid = self._get_file_id(fileid, seed)
105
106         #column 8,9 of fileid represent the segment number
107         #fileid[7:9] should be changed
108         for index, key in enumerate(keys):
109
110             temp_fileid = '%s%02X%s' % (fileid[0:8], index, fileid[10:])
111             download_url = 'http://f.youku.com/player/getFlvPath/sid/%s_%02X/st/flv/fileid/%s?k=%s' % (sid, index, temp_fileid, key)
112
113             info = {
114                 'id': '%s_part%02d' % (video_id, index),
115                 'url': download_url,
116                 'uploader': None,
117                 'upload_date': None,
118                 'title': video_title,
119                 'ext': ext,
120             }
121             files_info.append(info)
122
123         return files_info