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[youtubedl] / youtube_dl / extractor / crunchyroll.py
1 # encoding: utf-8
2 from __future__ import unicode_literals
3
4 import re, base64, zlib
5 from hashlib import sha1
6 from math import pow, sqrt, floor
7 from .common import InfoExtractor
8 from ..utils import (
9 ExtractorError,
10 compat_urllib_parse,
11 compat_urllib_request,
12 bytes_to_intlist,
13 intlist_to_bytes,
14 unified_strdate,
15 clean_html,
16 )
17 from ..aes import (
18 aes_cbc_decrypt,
19 inc,
20 )
21
22 class CrunchyrollIE(InfoExtractor):
23 _VALID_URL = r'(?:https?://)?(?:(?P<prefix>www|m)\.)?(?P<url>crunchyroll\.com/(?:[^/]*/[^/?&]*?|media/\?id=)(?P<video_id>[0-9]+))(?:[/?&]|$)'
24 _TESTS = [{
25 'url': 'http://www.crunchyroll.com/wanna-be-the-strongest-in-the-world/episode-1-an-idol-wrestler-is-born-645513',
26 'file': '645513.flv',
27 #'md5': 'b1639fd6ddfaa43788c85f6d1dddd412',
28 'info_dict': {
29 'title': 'Wanna be the Strongest in the World Episode 1 – An Idol-Wrestler is Born!',
30 'description': 'md5:2d17137920c64f2f49981a7797d275ef',
31 'thumbnail': 'http://img1.ak.crunchyroll.com/i/spire1-tmb/20c6b5e10f1a47b10516877d3c039cae1380951166_full.jpg',
32 'uploader': 'Yomiuri Telecasting Corporation (YTV)',
33 'upload_date': '20131013',
34 },
35 'params': {
36 # rtmp
37 'skip_download': True,
38 },
39 }]
40
41 _FORMAT_IDS = {
42 '360': ('60', '106'),
43 '480': ('61', '106'),
44 '720': ('62', '106'),
45 '1080': ('80', '108'),
46 }
47
48 def _decrypt_subtitles(self, data, iv, id):
49 data = bytes_to_intlist(data)
50 iv = bytes_to_intlist(iv)
51 id = int(id)
52
53 def obfuscate_key_aux(count, modulo, start):
54 output = list(start)
55 for _ in range(count):
56 output.append(output[-1] + output[-2])
57 # cut off start values
58 output = output[2:]
59 output = list(map(lambda x: x % modulo + 33, output))
60 return output
61
62 def obfuscate_key(key):
63 num1 = int(floor(pow(2, 25) * sqrt(6.9)))
64 num2 = (num1 ^ key) << 5
65 num3 = key ^ num1
66 num4 = num3 ^ (num3 >> 3) ^ num2
67 prefix = intlist_to_bytes(obfuscate_key_aux(20, 97, (1, 2)))
68 shaHash = bytes_to_intlist(sha1(prefix + str(num4).encode('ascii')).digest())
69 # Extend 160 Bit hash to 256 Bit
70 return shaHash + [0] * 12
71
72 key = obfuscate_key(id)
73 class Counter:
74 __value = iv
75 def next_value(self):
76 temp = self.__value
77 self.__value = inc(self.__value)
78 return temp
79 decrypted_data = intlist_to_bytes(aes_cbc_decrypt(data, key, iv))
80 return zlib.decompress(decrypted_data)
81
82 def _convert_subtitles_to_srt(self, subtitles):
83 i=1
84 output = ''
85 for start, end, text in re.findall(r'<event [^>]*?start="([^"]+)" [^>]*?end="([^"]+)" [^>]*?text="([^"]+)"[^>]*?>', subtitles):
86 start = start.replace('.', ',')
87 end = end.replace('.', ',')
88 text = clean_html(text)
89 text = text.replace('\\N', '\n')
90 if not text:
91 continue
92 output += '%d\n%s --> %s\n%s\n\n' % (i, start, end, text)
93 i+=1
94 return output
95
96 def _real_extract(self,url):
97 mobj = re.match(self._VALID_URL, url)
98 video_id = mobj.group('video_id')
99
100 if mobj.group('prefix') == 'm':
101 mobile_webpage = self._download_webpage(url, video_id, 'Downloading mobile webpage')
102 webpage_url = self._search_regex(r'<link rel="canonical" href="([^"]+)" />', mobile_webpage, 'webpage_url')
103 else:
104 webpage_url = 'http://www.' + mobj.group('url')
105
106 webpage = self._download_webpage(webpage_url, video_id, 'Downloading webpage')
107 note_m = self._html_search_regex(r'<div class="showmedia-trailer-notice">(.+?)</div>', webpage, 'trailer-notice', default='')
108 if note_m:
109 raise ExtractorError(note_m)
110
111 video_title = self._html_search_regex(r'<h1[^>]*>(.+?)</h1>', webpage, 'video_title', flags=re.DOTALL)
112 video_title = re.sub(r' {2,}', ' ', video_title)
113 video_description = self._html_search_regex(r'"description":"([^"]+)', webpage, 'video_description', default='')
114 if not video_description:
115 video_description = None
116 video_upload_date = self._html_search_regex(r'<div>Availability for free users:(.+?)</div>', webpage, 'video_upload_date', fatal=False, flags=re.DOTALL)
117 if video_upload_date:
118 video_upload_date = unified_strdate(video_upload_date)
119 video_uploader = self._html_search_regex(r'<div>\s*Publisher:(.+?)</div>', webpage, 'video_uploader', fatal=False, flags=re.DOTALL)
120
121 playerdata_url = compat_urllib_parse.unquote(self._html_search_regex(r'"config_url":"([^"]+)', webpage, 'playerdata_url'))
122 playerdata_req = compat_urllib_request.Request(playerdata_url)
123 playerdata_req.data = compat_urllib_parse.urlencode({'current_page': webpage_url})
124 playerdata_req.add_header('Content-Type', 'application/x-www-form-urlencoded')
125 playerdata = self._download_webpage(playerdata_req, video_id, note='Downloading media info')
126
127 stream_id = self._search_regex(r'<media_id>([^<]+)', playerdata, 'stream_id')
128 video_thumbnail = self._search_regex(r'<episode_image_url>([^<]+)', playerdata, 'thumbnail', fatal=False)
129
130 formats = []
131 for fmt in re.findall(r'\?p([0-9]{3,4})=1', webpage):
132 stream_quality, stream_format = self._FORMAT_IDS[fmt]
133 video_format = fmt+'p'
134 streamdata_req = compat_urllib_request.Request('http://www.crunchyroll.com/xml/')
135 # urlencode doesn't work!
136 streamdata_req.data = 'req=RpcApiVideoEncode%5FGetStreamInfo&video%5Fencode%5Fquality='+stream_quality+'&media%5Fid='+stream_id+'&video%5Fformat='+stream_format
137 streamdata_req.add_header('Content-Type', 'application/x-www-form-urlencoded')
138 streamdata_req.add_header('Content-Length', str(len(streamdata_req.data)))
139 streamdata = self._download_webpage(streamdata_req, video_id, note='Downloading media info for '+video_format)
140 video_url = self._search_regex(r'<host>([^<]+)', streamdata, 'video_url')
141 video_play_path = self._search_regex(r'<file>([^<]+)', streamdata, 'video_play_path')
142 formats.append({
143 'url': video_url,
144 'play_path': video_play_path,
145 'ext': 'flv',
146 'format': video_format,
147 'format_id': video_format,
148 })
149
150 subtitles = {}
151 for sub_id, sub_name in re.findall(r'\?ssid=([0-9]+)" title="([^"]+)', webpage):
152 sub_page = self._download_webpage('http://www.crunchyroll.com/xml/?req=RpcApiSubtitle_GetXml&subtitle_script_id='+sub_id,\
153 video_id, note='Downloading subtitles for '+sub_name)
154 id = self._search_regex(r'id=\'([0-9]+)', sub_page, 'subtitle_id', fatal=False)
155 iv = self._search_regex(r'<iv>([^<]+)', sub_page, 'subtitle_iv', fatal=False)
156 data = self._search_regex(r'<data>([^<]+)', sub_page, 'subtitle_data', fatal=False)
157 if not id or not iv or not data:
158 continue
159 id = int(id)
160 iv = base64.b64decode(iv)
161 data = base64.b64decode(data)
162
163 subtitle = self._decrypt_subtitles(data, iv, id).decode('utf-8')
164 lang_code = self._search_regex(r'lang_code=\'([^\']+)', subtitle, 'subtitle_lang_code', fatal=False)
165 if not lang_code:
166 continue
167 subtitles[lang_code] = self._convert_subtitles_to_srt(subtitle)
168
169 return {
170 'id': video_id,
171 'title': video_title,
172 'description': video_description,
173 'thumbnail': video_thumbnail,
174 'uploader': video_uploader,
175 'upload_date': video_upload_date,
176 'subtitles': subtitles,
177 'formats': formats,
178 }