Add support for crunchyroll.com

youtube_dl/extractor/crunchyroll.py

@@ -0,0 +1,171 @@
+# encoding: utf-8
+import re, base64, zlib
+from hashlib import sha1
+from math import pow, sqrt, floor
+from .common import InfoExtractor
+from ..utils import (
+    ExtractorError,
+    compat_urllib_parse,
+    compat_urllib_request,
+    bytes_to_intlist,
+    intlist_to_bytes,
+    unified_strdate,
+    clean_html,
+)
+from ..aes import (
+    aes_cbc_decrypt,
+    inc,
+)
+
+class CrunchyrollIE(InfoExtractor):
+    _VALID_URL = r'(?:https?://)?(?:www\.)?(?P<url>crunchyroll\.com/[^/]*/[^/?&]*?(?P<video_id>[0-9]+))(?:[/?&]|$)'
+    _TESTS = [{
+        u'url': u'http://www.crunchyroll.com/wanna-be-the-strongest-in-the-world/episode-1-an-idol-wrestler-is-born-645513',
+        u'file': u'645513.flv',
+        #u'md5': u'b1639fd6ddfaa43788c85f6d1dddd412',
+        u'info_dict': {
+            u'title': u'Wanna be the Strongest in the World – Episode 1 – An Idol-Wrestler is Born!',
+            u'description': u'md5:2d17137920c64f2f49981a7797d275ef',
+            u'thumbnail': u'http://img1.ak.crunchyroll.com/i/spire1-tmb/20c6b5e10f1a47b10516877d3c039cae1380951166_full.jpg',
+            u'uploader': u'Yomiuri Telecasting Corporation (YTV)',
+            u'upload_date': u'20131013',
+        },
+        u'params': {
+            # rtmp
+            u'skip_download': True,
+        },
+    }]
+
+    _FORMAT_IDS = {
+        u'360':  (u'60', u'106'),
+        u'480':  (u'61', u'106'),
+        u'720':  (u'62', u'106'),
+        u'1080': (u'80', u'108'),
+    }
+
+    def _decrypt_subtitles(self, data, iv, id):
+        data = bytes_to_intlist(data)
+        iv = bytes_to_intlist(iv)
+        id = int(id)
+
+        def obfuscate_key_aux(count, modulo, start):
+            output = list(start)
+            for _ in range(count):
+                output.append(output[-1] + output[-2])
+            # cut off start values
+            output = output[2:]
+            output = list(map(lambda x: x % modulo + 33, output))
+            return output
+
+        def obfuscate_key(key):
+            num1 = int(floor(pow(2, 25) * sqrt(6.9)))
+            num2 = (num1 ^ key) << 5
+            num3 = key ^ num1
+            num4 = num3 ^ (num3 >> 3) ^ num2
+            prefix = intlist_to_bytes(obfuscate_key_aux(20, 97, (1, 2)))
+            shaHash = bytes_to_intlist(sha1(prefix + str(num4).encode(u'ascii')).digest())
+            # Extend 160 Bit hash to 256 Bit
+            return shaHash + [0] * 12
+        
+        key = obfuscate_key(id)
+        class Counter:
+            __value = iv
+            def next_value(self):
+                temp = self.__value
+                self.__value = inc(self.__value)
+                return temp
+        decrypted_data = intlist_to_bytes(aes_cbc_decrypt(data, key, iv))
+        return zlib.decompress(decrypted_data)
+
+    def _convert_subtitles_to_srt(self, subtitles):
+        i=1
+        output = u''
+        for start, end, text in re.findall(r'<event [^>]*?start="([^"]+)" [^>]*?end="([^"]+)" [^>]*?text="([^"]+)"[^>]*?>', subtitles):
+            start = start.replace(u'.', u',')
+            end = end.replace(u'.', u',')
+            text = clean_html(text)
+            text = text.replace(u'\\N', u'\n')
+            if not text:
+                continue
+            output += u'%d\n%s --> %s\n%s\n\n' % (i, start, end, text)
+            i+=1
+        return output
+
+    def _real_extract(self,url):
+        mobj = re.match(self._VALID_URL, url)
+
+        webpage_url = u'http://www.' + mobj.group('url')
+        video_id = mobj.group(u'video_id')
+        webpage = self._download_webpage(webpage_url, video_id)
+        note_m = self._html_search_regex(r'<div class="showmedia-trailer-notice">(.+?)</div>', webpage, u'trailer-notice', default=u'')
+        if note_m:
+            raise ExtractorError(note_m)
+
+        video_title = self._html_search_regex(r'<h1[^>]*>(.+?)</h1>', webpage, u'video_title', flags=re.DOTALL)
+        video_title = re.sub(r' {5} *–? *', u' – ', video_title)
+        video_description = self._html_search_regex(r'"description":"([^"]+)', webpage, u'video_description', default=u'')
+        if not video_description:
+            video_description = None
+        video_upload_date = self._html_search_regex(r'<div>Availability for free users:(.+?)</div>', webpage, u'video_upload_date', fatal=False, flags=re.DOTALL)
+        if video_upload_date:
+            video_upload_date = unified_strdate(video_upload_date)
+        video_uploader = self._html_search_regex(r'<div>\s*Publisher:(.+?)</div>', webpage, u'video_uploader', fatal=False, flags=re.DOTALL)
+
+        playerdata_url = compat_urllib_parse.unquote(self._html_search_regex(r'"config_url":"([^"]+)', webpage, u'playerdata_url'))
+        playerdata_req = compat_urllib_request.Request(playerdata_url)
+        playerdata_req.data = compat_urllib_parse.urlencode({u'current_page': webpage_url})
+        playerdata_req.add_header(u'Content-Type', u'application/x-www-form-urlencoded')
+        playerdata = self._download_webpage(playerdata_req, video_id, note=u'Downloading media info')
+        
+        stream_id = self._search_regex(r'<media_id>([^<]+)', playerdata, u'stream_id')
+        video_thumbnail = self._search_regex(r'<episode_image_url>([^<]+)', playerdata, u'thumbnail', fatal=False)
+
+        formats = []
+        for fmt in re.findall(r'\?p([0-9]{3,4})=1', webpage):
+            stream_quality, stream_format = self._FORMAT_IDS[fmt]
+            video_format = fmt+u'p'
+            streamdata_req = compat_urllib_request.Request(u'http://www.crunchyroll.com/xml/')
+            # urlencode doesn't work!
+            streamdata_req.data = u'req=RpcApiVideoEncode%5FGetStreamInfo&video%5Fencode%5Fquality='+stream_quality+u'&media%5Fid='+stream_id+u'&video%5Fformat='+stream_format
+            streamdata_req.add_header(u'Content-Type', u'application/x-www-form-urlencoded')
+            streamdata_req.add_header(u'Content-Length', str(len(streamdata_req.data)))
+            streamdata = self._download_webpage(streamdata_req, video_id, note=u'Downloading media info for '+video_format)
+            video_url = self._search_regex(r'<host>([^<]+)', streamdata, u'video_url')
+            video_play_path = self._search_regex(r'<file>([^<]+)', streamdata, u'video_play_path')
+            formats.append({
+                u'url': video_url,
+                u'play_path':   video_play_path,
+                u'ext': 'flv',
+                u'format': video_format,
+                u'format_id': video_format,
+            })
+
+        subtitles = {}
+        for sub_id, sub_name in re.findall(r'\?ssid=([0-9]+)" title="([^"]+)', webpage):
+            sub_page = self._download_webpage(u'http://www.crunchyroll.com/xml/?req=RpcApiSubtitle_GetXml&subtitle_script_id='+sub_id,\
+                                              video_id, note=u'Downloading subtitles for '+sub_name)
+            id = self._search_regex(r'id=\'([0-9]+)', sub_page, u'subtitle_id', fatal=False)
+            iv = self._search_regex(r'<iv>([^<]+)', sub_page, u'subtitle_iv', fatal=False)
+            data = self._search_regex(r'<data>([^<]+)', sub_page, u'subtitle_data', fatal=False)
+            if not id or not iv or not data:
+                continue
+            id = int(id)
+            iv = base64.b64decode(iv)
+            data = base64.b64decode(data)
+
+            subtitle = self._decrypt_subtitles(data, iv, id).decode(u'utf-8')
+            lang_code = self._search_regex(r'lang_code=\'([^\']+)', subtitle, u'subtitle_lang_code', fatal=False)
+            if not lang_code:
+                continue
+            subtitles[lang_code] = self._convert_subtitles_to_srt(subtitle)
+
+        return {
+            u'id':          video_id,
+            u'title':       video_title,
+            u'description': video_description,
+            u'thumbnail':   video_thumbnail,
+            u'uploader':    video_uploader,
+            u'upload_date': video_upload_date,
+            u'subtitles':   subtitles,
+            u'formats':     formats,
+        }