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