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[youtube-dl] / theplatform.py
1 from __future__ import unicode_literals
2
3 import re
4 import json
5 import time
6 import hmac
7 import binascii
8 import hashlib
9
10
11 from .common import InfoExtractor
12 from ..compat import (
13     compat_str,
14 )
15 from ..utils import (
16     determine_ext,
17     ExtractorError,
18     xpath_with_ns,
19     unsmuggle_url,
20     int_or_none,
21 )
22
23 _x = lambda p: xpath_with_ns(p, {'smil': 'http://www.w3.org/2005/SMIL21/Language'})
24
25
26 class ThePlatformIE(InfoExtractor):
27     _VALID_URL = r'''(?x)
28         (?:https?://(?:link|player)\.theplatform\.com/[sp]/(?P<provider_id>[^/]+)/
29            (?P<config>(?:[^/\?]+/(?:swf|config)|onsite)/select/)?
30          |theplatform:)(?P<id>[^/\?&]+)'''
31
32     _TESTS = [{
33         # from http://www.metacafe.com/watch/cb-e9I_cZgTgIPd/blackberrys_big_bold_z30/
34         'url': 'http://link.theplatform.com/s/dJ5BDC/e9I_cZgTgIPd/meta.smil?format=smil&Tracking=true&mbr=true',
35         'info_dict': {
36             'id': 'e9I_cZgTgIPd',
37             'ext': 'flv',
38             'title': 'Blackberry\'s big, bold Z30',
39             'description': 'The Z30 is Blackberry\'s biggest, baddest mobile messaging device yet.',
40             'duration': 247,
41         },
42         'params': {
43             # rtmp download
44             'skip_download': True,
45         },
46     }, {
47         # from http://www.cnet.com/videos/tesla-model-s-a-second-step-towards-a-cleaner-motoring-future/
48         'url': 'http://link.theplatform.com/s/kYEXFC/22d_qsQ6MIRT',
49         'info_dict': {
50             'id': '22d_qsQ6MIRT',
51             'ext': 'flv',
52             'description': 'md5:ac330c9258c04f9d7512cf26b9595409',
53             'title': 'Tesla Model S: A second step towards a cleaner motoring future',
54         },
55         'params': {
56             # rtmp download
57             'skip_download': True,
58         }
59     }]
60
61     @staticmethod
62     def _sign_url(url, sig_key, sig_secret, life=600, include_qs=False):
63         flags = '10' if include_qs else '00'
64         expiration_date = '%x' % (int(time.time()) + life)
65
66         def str_to_hex(str):
67             return binascii.b2a_hex(str.encode('ascii')).decode('ascii')
68
69         def hex_to_str(hex):
70             return binascii.a2b_hex(hex)
71
72         relative_path = url.split('http://link.theplatform.com/s/')[1].split('?')[0]
73         clear_text = hex_to_str(flags + expiration_date + str_to_hex(relative_path))
74         checksum = hmac.new(sig_key.encode('ascii'), clear_text, hashlib.sha1).hexdigest()
75         sig = flags + expiration_date + checksum + str_to_hex(sig_secret)
76         return '%s&sig=%s' % (url, sig)
77
78     def _real_extract(self, url):
79         url, smuggled_data = unsmuggle_url(url, {})
80
81         mobj = re.match(self._VALID_URL, url)
82         provider_id = mobj.group('provider_id')
83         video_id = mobj.group('id')
84
85         if not provider_id:
86             provider_id = 'dJ5BDC'
87
88         if smuggled_data.get('force_smil_url', False):
89             smil_url = url
90         elif mobj.group('config'):
91             config_url = url + '&form=json'
92             config_url = config_url.replace('swf/', 'config/')
93             config_url = config_url.replace('onsite/', 'onsite/config/')
94             config = self._download_json(config_url, video_id, 'Downloading config')
95             smil_url = config['releaseUrl'] + '&format=SMIL&formats=MPEG4&manifest=f4m'
96         else:
97             smil_url = ('http://link.theplatform.com/s/{0}/{1}/meta.smil?'
98                         'format=smil&mbr=true'.format(provider_id, video_id))
99
100         sig = smuggled_data.get('sig')
101         if sig:
102             smil_url = self._sign_url(smil_url, sig['key'], sig['secret'])
103
104         meta = self._download_xml(smil_url, video_id)
105         try:
106             error_msg = next(
107                 n.attrib['abstract']
108                 for n in meta.findall(_x('.//smil:ref'))
109                 if n.attrib.get('title') == 'Geographic Restriction' or n.attrib.get('title') == 'Expired')
110         except StopIteration:
111             pass
112         else:
113             raise ExtractorError(error_msg, expected=True)
114
115         info_url = 'http://link.theplatform.com/s/{0}/{1}?format=preview'.format(provider_id, video_id)
116         info_json = self._download_webpage(info_url, video_id)
117         info = json.loads(info_json)
118
119         subtitles = {}
120         captions = info.get('captions')
121         if isinstance(captions, list):
122             for caption in captions:
123                 lang, src, mime = caption.get('lang', 'en'), caption.get('src'), caption.get('type')
124                 subtitles[lang] = [{
125                     'ext': 'srt' if mime == 'text/srt' else 'ttml',
126                     'url': src,
127                 }]
128
129         head = meta.find(_x('smil:head'))
130         body = meta.find(_x('smil:body'))
131
132         f4m_node = body.find(_x('smil:seq//smil:video'))
133         if f4m_node is None:
134             f4m_node = body.find(_x('smil:seq/smil:video'))
135         if f4m_node is not None and '.f4m' in f4m_node.attrib['src']:
136             f4m_url = f4m_node.attrib['src']
137             if 'manifest.f4m?' not in f4m_url:
138                 f4m_url += '?'
139             # the parameters are from syfy.com, other sites may use others,
140             # they also work for nbc.com
141             f4m_url += '&g=UXWGVKRWHFSP&hdcore=3.0.3'
142             formats = self._extract_f4m_formats(f4m_url, video_id)
143         else:
144             formats = []
145             switch = body.find(_x('smil:switch'))
146             if switch is None:
147                 switch = body.find(_x('smil:par//smil:switch'))
148             if switch is None:
149                 switch = body.find(_x('smil:par/smil:switch'))
150             if switch is None:
151                 switch = body.find(_x('smil:par'))
152             if switch is not None:
153                 base_url = head.find(_x('smil:meta')).attrib['base']
154                 for f in switch.findall(_x('smil:video')):
155                     attr = f.attrib
156                     width = int_or_none(attr.get('width'))
157                     height = int_or_none(attr.get('height'))
158                     vbr = int_or_none(attr.get('system-bitrate'), 1000)
159                     format_id = '%dx%d_%dk' % (width, height, vbr)
160                     formats.append({
161                         'format_id': format_id,
162                         'url': base_url,
163                         'play_path': 'mp4:' + attr['src'],
164                         'ext': 'flv',
165                         'width': width,
166                         'height': height,
167                         'vbr': vbr,
168                     })
169             else:
170                 switch = body.find(_x('smil:seq//smil:switch'))
171                 if switch is None:
172                     switch = body.find(_x('smil:seq/smil:switch'))
173                 for f in switch.findall(_x('smil:video')):
174                     attr = f.attrib
175                     vbr = int_or_none(attr.get('system-bitrate'), 1000)
176                     ext = determine_ext(attr['src'])
177                     if ext == 'once':
178                         ext = 'mp4'
179                     formats.append({
180                         'format_id': compat_str(vbr),
181                         'url': attr['src'],
182                         'vbr': vbr,
183                         'ext': ext,
184                     })
185             self._sort_formats(formats)
186
187         return {
188             'id': video_id,
189             'title': info['title'],
190             'subtitles': subtitles,
191             'formats': formats,
192             'description': info['description'],
193             'thumbnail': info['defaultThumbnailUrl'],
194             'duration': int_or_none(info.get('duration'), 1000),
195         }