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[youtube-dl] / youtube_dl / extractor / mit.py
1 from __future__ import unicode_literals
2
3 import re
4 import json
5
6 from .common import InfoExtractor
7 from .youtube import YoutubeIE
8 from ..utils import (
9     compat_urlparse,
10     clean_html,
11     ExtractorError,
12     get_element_by_id,
13 )
14
15
16 class TechTVMITIE(InfoExtractor):
17     IE_NAME = 'techtv.mit.edu'
18     _VALID_URL = r'https?://techtv\.mit\.edu/(videos|embeds)/(?P<id>\d+)'
19
20     _TEST = {
21         'url': 'http://techtv.mit.edu/videos/25418-mit-dna-learning-center-set',
22         'md5': '1f8cb3e170d41fd74add04d3c9330e5f',
23         'info_dict': {
24             'id': '25418',
25             'ext': 'mp4',
26             'title': 'MIT DNA Learning Center Set',
27             'description': 'md5:82313335e8a8a3f243351ba55bc1b474',
28         },
29     }
30
31     def _real_extract(self, url):
32         mobj = re.match(self._VALID_URL, url)
33         video_id = mobj.group('id')
34         raw_page = self._download_webpage(
35             'http://techtv.mit.edu/videos/%s' % video_id, video_id)
36         clean_page = re.compile(r'<!--.*?-->', re.S).sub('', raw_page)
37
38         base_url = self._search_regex(
39             r'ipadUrl: \'(.+?cloudfront.net/)', raw_page, 'base url')
40         formats_json = self._search_regex(
41             r'bitrates: (\[.+?\])', raw_page, 'video formats')
42         formats_mit = json.loads(formats_json)
43         formats = [
44             {
45                 'format_id': f['label'],
46                 'url': base_url + f['url'].partition(':')[2],
47                 'ext': f['url'].partition(':')[0],
48                 'format': f['label'],
49                 'width': f['width'],
50                 'vbr': f['bitrate'],
51             }
52             for f in formats_mit
53         ]
54
55         title = get_element_by_id('edit-title', clean_page)
56         description = clean_html(get_element_by_id('edit-description', clean_page))
57         thumbnail = self._search_regex(
58             r'playlist:.*?url: \'(.+?)\'',
59             raw_page, 'thumbnail', flags=re.DOTALL)
60
61         return {
62             'id': video_id,
63             'title': title,
64             'formats': formats,
65             'description': description,
66             'thumbnail': thumbnail,
67         }
68
69
70 class MITIE(TechTVMITIE):
71     IE_NAME = 'video.mit.edu'
72     _VALID_URL = r'https?://video\.mit\.edu/watch/(?P<title>[^/]+)'
73
74     _TEST = {
75         'url': 'http://video.mit.edu/watch/the-government-is-profiling-you-13222/',
76         'md5': '7db01d5ccc1895fc5010e9c9e13648da',
77         'info_dict': {
78             'id': '21783',
79             'ext': 'mp4',
80             'title': 'The Government is Profiling You',
81             'description': 'md5:ad5795fe1e1623b73620dbfd47df9afd',
82         },
83     }
84
85     def _real_extract(self, url):
86         mobj = re.match(self._VALID_URL, url)
87         page_title = mobj.group('title')
88         webpage = self._download_webpage(url, page_title)
89         embed_url = self._search_regex(
90             r'<iframe .*?src="(.+?)"', webpage, 'embed url')
91         return self.url_result(embed_url, ie='TechTVMIT')
92
93
94 class OCWMITIE(InfoExtractor):
95     IE_NAME = 'ocw.mit.edu'
96     _VALID_URL = r'^http://ocw\.mit\.edu/courses/(?P<topic>[a-z0-9\-]+)'
97     _BASE_URL = 'http://ocw.mit.edu/'
98
99     _TESTS = [
100         {
101             '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/',
102             'info_dict': {
103                 'id': 'EObHWIEKGjA',
104                 'ext': 'mp4',
105                 'title': 'Lecture 7: Multiple Discrete Random Variables: Expectations, Conditioning, Independence',
106                 'description': 'In this lecture, the professor discussed multiple random variables, expectations, and binomial distribution.',
107                 #'subtitles': '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/MIT6_041F11_lec07_300k.mp4.srt'
108             }
109         },
110         {
111             '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/',
112             'info_dict': {
113                 'id': '7K1sB05pE0A',
114                 'ext': 'mp4',
115                 'title': 'Session 1: Introduction to Derivatives',
116                 'description': 'This section contains lecture video excerpts, lecture notes, an interactive mathlet with supporting documents, and problem solving videos.',
117                 #'subtitles': 'http://ocw.mit.edu//courses/mathematics/18-01sc-single-variable-calculus-fall-2010/ocw-18.01-f07-lec01_300k.SRT'
118             }
119         }
120     ]
121
122     def _real_extract(self, url):
123         mobj = re.match(self._VALID_URL, url)
124         topic = mobj.group('topic')
125
126         webpage = self._download_webpage(url, topic)
127         title = self._html_search_meta('WT.cg_s', webpage)
128         description = self._html_search_meta('Description', webpage)
129
130         # search for call to ocw_embed_chapter_media(container_id, media_url, provider, page_url, image_url, start, stop, captions_file)
131         embed_chapter_media = re.search(r'ocw_embed_chapter_media\((.+?)\)', webpage)
132         if embed_chapter_media:
133             metadata = re.sub(r'[\'"]', '', embed_chapter_media.group(1))
134             metadata = re.split(r', ?', metadata)
135             yt = metadata[1]
136             subs = compat_urlparse.urljoin(self._BASE_URL, metadata[7])
137         else:
138             # search for call to ocw_embed_chapter_media(container_id, media_url, provider, page_url, image_url, captions_file)
139             embed_media = re.search(r'ocw_embed_media\((.+?)\)', webpage)
140             if embed_media:
141                 metadata = re.sub(r'[\'"]', '', embed_media.group(1))
142                 metadata = re.split(r', ?', metadata)
143                 yt = metadata[1]
144                 subs = compat_urlparse.urljoin(self._BASE_URL, metadata[5])
145             else:
146                 raise ExtractorError('Unable to find embedded YouTube video.')
147         video_id = YoutubeIE.extract_id(yt)
148
149         return {
150             '_type': 'url_transparent',
151             'id': video_id,
152             'title': title,
153             'description': description,
154             'url': yt,
155             'url_transparent'
156             'subtitles': subs,
157             'ie_key': 'Youtube',
158         }