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1 | import json | |
2 | import re | |
3 | ||
4 | from .common import InfoExtractor | |
5 | from .youtube import YoutubeIE | |
6 | from ..utils import ( | |
7 | ExtractorError, | |
8 | clean_html, | |
9 | get_element_by_id, | |
10 | ) | |
11 | ||
12 | ||
13 | class TechTVMITIE(InfoExtractor): | |
14 | IE_NAME = 'techtv.mit.edu' | |
15 | _VALID_URL = r'https?://techtv\.mit\.edu/(?:videos|embeds)/(?P<id>\d+)' | |
16 | ||
17 | _TEST = { | |
18 | 'url': 'http://techtv.mit.edu/videos/25418-mit-dna-learning-center-set', | |
19 | 'md5': '00a3a27ee20d44bcaa0933ccec4a2cf7', | |
20 | 'info_dict': { | |
21 | 'id': '25418', | |
22 | 'ext': 'mp4', | |
23 | 'title': 'MIT DNA and Protein Sets', | |
24 | 'description': 'md5:46f5c69ce434f0a97e7c628cc142802d', | |
25 | }, | |
26 | } | |
27 | ||
28 | def _real_extract(self, url): | |
29 | video_id = self._match_id(url) | |
30 | raw_page = self._download_webpage( | |
31 | 'http://techtv.mit.edu/videos/%s' % video_id, video_id) | |
32 | clean_page = re.compile(r'<!--.*?-->', re.S).sub('', raw_page) | |
33 | ||
34 | base_url = self._proto_relative_url(self._search_regex( | |
35 | r'ipadUrl: \'(.+?cloudfront.net/)', raw_page, 'base url'), 'http:') | |
36 | formats_json = self._search_regex( | |
37 | r'bitrates: (\[.+?\])', raw_page, 'video formats') | |
38 | formats_mit = json.loads(formats_json) | |
39 | formats = [ | |
40 | { | |
41 | 'format_id': f['label'], | |
42 | 'url': base_url + f['url'].partition(':')[2], | |
43 | 'ext': f['url'].partition(':')[0], | |
44 | 'format': f['label'], | |
45 | 'width': f['width'], | |
46 | 'vbr': f['bitrate'], | |
47 | } | |
48 | for f in formats_mit | |
49 | ] | |
50 | ||
51 | title = get_element_by_id('edit-title', clean_page) | |
52 | description = clean_html(get_element_by_id('edit-description', clean_page)) | |
53 | thumbnail = self._search_regex( | |
54 | r'playlist:.*?url: \'(.+?)\'', | |
55 | raw_page, 'thumbnail', flags=re.DOTALL) | |
56 | ||
57 | return { | |
58 | 'id': video_id, | |
59 | 'title': title, | |
60 | 'formats': formats, | |
61 | 'description': description, | |
62 | 'thumbnail': thumbnail, | |
63 | } | |
64 | ||
65 | ||
66 | class OCWMITIE(InfoExtractor): | |
67 | IE_NAME = 'ocw.mit.edu' | |
68 | _VALID_URL = r'^https?://ocw\.mit\.edu/courses/(?P<topic>[a-z0-9\-]+)' | |
69 | _BASE_URL = 'http://ocw.mit.edu/' | |
70 | ||
71 | _TESTS = [ | |
72 | { | |
73 | 'url': 'http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-041-probabilistic-systems-analysis-and-applied-probability-fall-2010/video-lectures/lecture-7-multiple-variables-expectations-independence/', | |
74 | 'info_dict': { | |
75 | 'id': 'EObHWIEKGjA', | |
76 | 'ext': 'webm', | |
77 | 'title': 'Lecture 7: Multiple Discrete Random Variables: Expectations, Conditioning, Independence', | |
78 | 'description': 'In this lecture, the professor discussed multiple random variables, expectations, and binomial distribution.', | |
79 | 'upload_date': '20121109', | |
80 | 'uploader_id': 'MIT', | |
81 | 'uploader': 'MIT OpenCourseWare', | |
82 | } | |
83 | }, | |
84 | { | |
85 | 'url': 'http://ocw.mit.edu/courses/mathematics/18-01sc-single-variable-calculus-fall-2010/1.-differentiation/part-a-definition-and-basic-rules/session-1-introduction-to-derivatives/', | |
86 | 'info_dict': { | |
87 | 'id': '7K1sB05pE0A', | |
88 | 'ext': 'mp4', | |
89 | 'title': 'Session 1: Introduction to Derivatives', | |
90 | 'upload_date': '20090818', | |
91 | 'uploader_id': 'MIT', | |
92 | 'uploader': 'MIT OpenCourseWare', | |
93 | 'description': 'This section contains lecture video excerpts, lecture notes, an interactive mathlet with supporting documents, and problem solving videos.', | |
94 | } | |
95 | } | |
96 | ] | |
97 | ||
98 | def _real_extract(self, url): | |
99 | mobj = self._match_valid_url(url) | |
100 | topic = mobj.group('topic') | |
101 | ||
102 | webpage = self._download_webpage(url, topic) | |
103 | title = self._html_search_meta('WT.cg_s', webpage) | |
104 | description = self._html_search_meta('Description', webpage) | |
105 | ||
106 | # search for call to ocw_embed_chapter_media(container_id, media_url, provider, page_url, image_url, start, stop, captions_file) | |
107 | embed_chapter_media = re.search(r'ocw_embed_chapter_media\((.+?)\)', webpage) | |
108 | if embed_chapter_media: | |
109 | metadata = re.sub(r'[\'"]', '', embed_chapter_media.group(1)) | |
110 | metadata = re.split(r', ?', metadata) | |
111 | yt = metadata[1] | |
112 | else: | |
113 | # search for call to ocw_embed_chapter_media(container_id, media_url, provider, page_url, image_url, captions_file) | |
114 | embed_media = re.search(r'ocw_embed_media\((.+?)\)', webpage) | |
115 | if embed_media: | |
116 | metadata = re.sub(r'[\'"]', '', embed_media.group(1)) | |
117 | metadata = re.split(r', ?', metadata) | |
118 | yt = metadata[1] | |
119 | else: | |
120 | raise ExtractorError('Unable to find embedded YouTube video.') | |
121 | video_id = YoutubeIE.extract_id(yt) | |
122 | ||
123 | return { | |
124 | '_type': 'url_transparent', | |
125 | 'id': video_id, | |
126 | 'title': title, | |
127 | 'description': description, | |
128 | 'url': yt, | |
129 | 'ie_key': 'Youtube', | |
130 | } |