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[youtubedl] / youtube_dl / extractor / infoq.py
1 # coding: utf-8
2
3 from __future__ import unicode_literals
4
5 import base64
6
7 from ..compat import (
8 compat_urllib_parse_unquote,
9 compat_urlparse,
10 )
11 from ..utils import (
12 determine_ext,
13 update_url_query,
14 )
15 from .bokecc import BokeCCBaseIE
16
17
18 class InfoQIE(BokeCCBaseIE):
19 _VALID_URL = r'https?://(?:www\.)?infoq\.com/(?:[^/]+/)+(?P<id>[^/]+)'
20
21 _TESTS = [{
22 'url': 'http://www.infoq.com/presentations/A-Few-of-My-Favorite-Python-Things',
23 'md5': 'b5ca0e0a8c1fed93b0e65e48e462f9a2',
24 'info_dict': {
25 'id': 'A-Few-of-My-Favorite-Python-Things',
26 'ext': 'mp4',
27 'description': 'Mike Pirnat presents some tips and tricks, standard libraries and third party packages that make programming in Python a richer experience.',
28 'title': 'A Few of My Favorite [Python] Things',
29 },
30 }, {
31 'url': 'http://www.infoq.com/fr/presentations/changez-avis-sur-javascript',
32 'only_matching': True,
33 }, {
34 'url': 'http://www.infoq.com/cn/presentations/openstack-continued-delivery',
35 'md5': '4918d0cca1497f2244572caf626687ef',
36 'info_dict': {
37 'id': 'openstack-continued-delivery',
38 'title': 'OpenStack持续交付之路',
39 'ext': 'flv',
40 'description': 'md5:308d981fb28fa42f49f9568322c683ff',
41 },
42 }, {
43 'url': 'https://www.infoq.com/presentations/Simple-Made-Easy',
44 'md5': '0e34642d4d9ef44bf86f66f6399672db',
45 'info_dict': {
46 'id': 'Simple-Made-Easy',
47 'title': 'Simple Made Easy',
48 'ext': 'mp3',
49 'description': 'md5:3e0e213a8bbd074796ef89ea35ada25b',
50 },
51 'params': {
52 'format': 'bestaudio',
53 },
54 }]
55
56 def _extract_rtmp_video(self, webpage):
57 # The server URL is hardcoded
58 video_url = 'rtmpe://video.infoq.com/cfx/st/'
59
60 # Extract video URL
61 encoded_id = self._search_regex(
62 r"jsclassref\s*=\s*'([^']*)'", webpage, 'encoded id', default=None)
63
64 real_id = compat_urllib_parse_unquote(base64.b64decode(encoded_id.encode('ascii')).decode('utf-8'))
65 playpath = 'mp4:' + real_id
66
67 return [{
68 'format_id': 'rtmp_video',
69 'url': video_url,
70 'ext': determine_ext(playpath),
71 'play_path': playpath,
72 }]
73
74 def _extract_cf_auth(self, webpage):
75 policy = self._search_regex(r'InfoQConstants\.scp\s*=\s*\'([^\']+)\'', webpage, 'policy')
76 signature = self._search_regex(r'InfoQConstants\.scs\s*=\s*\'([^\']+)\'', webpage, 'signature')
77 key_pair_id = self._search_regex(r'InfoQConstants\.sck\s*=\s*\'([^\']+)\'', webpage, 'key-pair-id')
78 return {
79 'Policy': policy,
80 'Signature': signature,
81 'Key-Pair-Id': key_pair_id,
82 }
83
84 def _extract_http_video(self, webpage):
85 http_video_url = self._search_regex(r'P\.s\s*=\s*\'([^\']+)\'', webpage, 'video URL')
86 http_video_url = update_url_query(http_video_url, self._extract_cf_auth(webpage))
87 return [{
88 'format_id': 'http_video',
89 'url': http_video_url,
90 }]
91
92 def _extract_http_audio(self, webpage, video_id):
93 fields = self._hidden_inputs(webpage)
94 http_audio_url = fields.get('filename')
95 if not http_audio_url:
96 return []
97
98 # base URL is found in the Location header in the response returned by
99 # GET https://www.infoq.com/mp3download.action?filename=... when logged in.
100 http_audio_url = compat_urlparse.urljoin('http://res.infoq.com/downloads/mp3downloads/', http_audio_url)
101 http_audio_url = update_url_query(http_audio_url, self._extract_cf_auth(webpage))
102
103 # audio file seem to be missing some times even if there is a download link
104 # so probe URL to make sure
105 if not self._is_valid_url(http_audio_url, video_id):
106 return []
107
108 return [{
109 'format_id': 'http_audio',
110 'url': http_audio_url,
111 'vcodec': 'none',
112 }]
113
114 def _real_extract(self, url):
115 video_id = self._match_id(url)
116 webpage = self._download_webpage(url, video_id)
117
118 video_title = self._html_search_regex(r'<title>(.*?)</title>', webpage, 'title')
119 video_description = self._html_search_meta('description', webpage, 'description')
120
121 if '/cn/' in url:
122 # for China videos, HTTP video URL exists but always fails with 403
123 formats = self._extract_bokecc_formats(webpage, video_id)
124 else:
125 formats = (
126 self._extract_rtmp_video(webpage) +
127 self._extract_http_video(webpage) +
128 self._extract_http_audio(webpage, video_id))
129
130 self._sort_formats(formats)
131
132 return {
133 'id': video_id,
134 'title': video_title,
135 'description': video_description,
136 'formats': formats,
137 }