2014-04-07 22:56:15 +08:00
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# encoding: utf-8
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from __future__ import unicode_literals
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import re
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import base64
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from .common import InfoExtractor
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from ..utils import (
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struct_unpack,
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)
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class RTVEALaCartaIE(InfoExtractor):
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IE_NAME = 'rtve.es:alacarta'
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IE_DESC = 'RTVE a la carta'
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_VALID_URL = r'http://www\.rtve\.es/alacarta/videos/[^/]+/[^/]+/(?P<id>\d+)'
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_TEST = {
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'url': 'http://www.rtve.es/alacarta/videos/balonmano/o-swiss-cup-masculina-final-espana-suecia/2491869/',
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2014-07-21 18:14:06 +08:00
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'md5': '1d49b7e1ca7a7502c56a4bf1b60f1b43',
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2014-04-07 22:56:15 +08:00
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'info_dict': {
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'id': '2491869',
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'ext': 'mp4',
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'title': 'Balonmano - Swiss Cup masculina. Final: España-Suecia',
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},
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}
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def _decrypt_url(self, png):
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encrypted_data = base64.b64decode(png)
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text_index = encrypted_data.find(b'tEXt')
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text_chunk = encrypted_data[text_index-4:]
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length = struct_unpack('!I', text_chunk[:4])[0]
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# Use bytearray to get integers when iterating in both python 2.x and 3.x
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data = bytearray(text_chunk[8:8+length])
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data = [chr(b) for b in data if b != 0]
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hash_index = data.index('#')
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alphabet_data = data[:hash_index]
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url_data = data[hash_index+1:]
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alphabet = []
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e = 0
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d = 0
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for l in alphabet_data:
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if d == 0:
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alphabet.append(l)
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d = e = (e + 1) % 4
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else:
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d -= 1
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url = ''
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f = 0
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e = 3
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b = 1
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for letter in url_data:
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if f == 0:
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l = int(letter)*10
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f = 1
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else:
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if e == 0:
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l += int(letter)
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url += alphabet[l]
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e = (b + 3) % 4
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f = 0
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b += 1
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else:
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e -= 1
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return url
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def _real_extract(self, url):
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mobj = re.match(self._VALID_URL, url)
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video_id = mobj.group('id')
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info = self._download_json(
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'http://www.rtve.es/api/videos/%s/config/alacarta_videos.json' % video_id,
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video_id)['page']['items'][0]
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png_url = 'http://www.rtve.es/ztnr/movil/thumbnail/default/videos/%s.png' % video_id
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png = self._download_webpage(png_url, video_id, 'Downloading url information')
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video_url = self._decrypt_url(png)
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return {
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'id': video_id,
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'title': info['title'],
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'url': video_url,
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'thumbnail': info['image'],
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}
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