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[youtubedl] / youtube_dl / extractor / channel9.py
1 from __future__ import unicode_literals
2
3 import re
4
5 from .common import InfoExtractor
6 from ..utils import ExtractorError
7
8 class Channel9IE(InfoExtractor):
9 '''
10 Common extractor for channel9.msdn.com.
11
12 The type of provided URL (video or playlist) is determined according to
13 meta Search.PageType from web page HTML rather than URL itself, as it is
14 not always possible to do.
15 '''
16 IE_DESC = 'Channel 9'
17 IE_NAME = 'channel9'
18 _VALID_URL = r'https?://(?:www\.)?channel9\.msdn\.com/(?P<contentpath>.+)/?'
19
20 _TESTS = [
21 {
22 'url': 'http://channel9.msdn.com/Events/TechEd/Australia/2013/KOS002',
23 'md5': 'bbd75296ba47916b754e73c3a4bbdf10',
24 'info_dict': {
25 'id': 'Events/TechEd/Australia/2013/KOS002',
26 'ext': 'mp4',
27 'title': 'Developer Kick-Off Session: Stuff We Love',
28 'description': 'md5:c08d72240b7c87fcecafe2692f80e35f',
29 'duration': 4576,
30 'thumbnail': 'http://media.ch9.ms/ch9/9d51/03902f2d-fc97-4d3c-b195-0bfe15a19d51/KOS002_220.jpg',
31 'session_code': 'KOS002',
32 'session_day': 'Day 1',
33 'session_room': 'Arena 1A',
34 'session_speakers': [ 'Ed Blankenship', 'Andrew Coates', 'Brady Gaster', 'Patrick Klug', 'Mads Kristensen' ],
35 },
36 },
37 {
38 'url': 'http://channel9.msdn.com/posts/Self-service-BI-with-Power-BI-nuclear-testing',
39 'md5': 'b43ee4529d111bc37ba7ee4f34813e68',
40 'info_dict': {
41 'id': 'posts/Self-service-BI-with-Power-BI-nuclear-testing',
42 'ext': 'mp4',
43 'title': 'Self-service BI with Power BI - nuclear testing',
44 'description': 'md5:d1e6ecaafa7fb52a2cacdf9599829f5b',
45 'duration': 1540,
46 'thumbnail': 'http://media.ch9.ms/ch9/87e1/0300391f-a455-4c72-bec3-4422f19287e1/selfservicenuk_512.jpg',
47 'authors': [ 'Mike Wilmot' ],
48 },
49 }
50 ]
51
52 _RSS_URL = 'http://channel9.msdn.com/%s/RSS'
53
54 # Sorted by quality
55 _known_formats = ['MP3', 'MP4', 'Mid Quality WMV', 'Mid Quality MP4', 'High Quality WMV', 'High Quality MP4']
56
57 def _restore_bytes(self, formatted_size):
58 if not formatted_size:
59 return 0
60 m = re.match(r'^(?P<size>\d+(?:\.\d+)?)\s+(?P<units>[a-zA-Z]+)', formatted_size)
61 if not m:
62 return 0
63 units = m.group('units')
64 try:
65 exponent = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'].index(units.upper())
66 except ValueError:
67 return 0
68 size = float(m.group('size'))
69 return int(size * (1024 ** exponent))
70
71 def _formats_from_html(self, html):
72 FORMAT_REGEX = r'''
73 (?x)
74 <a\s+href="(?P<url>[^"]+)">(?P<quality>[^<]+)</a>\s*
75 <span\s+class="usage">\((?P<note>[^\)]+)\)</span>\s*
76 (?:<div\s+class="popup\s+rounded">\s*
77 <h3>File\s+size</h3>\s*(?P<filesize>.*?)\s*
78 </div>)? # File size part may be missing
79 '''
80 # Extract known formats
81 formats = [{
82 'url': x.group('url'),
83 'format_id': x.group('quality'),
84 'format_note': x.group('note'),
85 'format': '%s (%s)' % (x.group('quality'), x.group('note')),
86 'filesize': self._restore_bytes(x.group('filesize')), # File size is approximate
87 'preference': self._known_formats.index(x.group('quality')),
88 'vcodec': 'none' if x.group('note') == 'Audio only' else None,
89 } for x in list(re.finditer(FORMAT_REGEX, html)) if x.group('quality') in self._known_formats]
90
91 self._sort_formats(formats)
92
93 return formats
94
95 def _extract_title(self, html):
96 title = self._html_search_meta('title', html, 'title')
97 if title is None:
98 title = self._og_search_title(html)
99 TITLE_SUFFIX = ' (Channel 9)'
100 if title is not None and title.endswith(TITLE_SUFFIX):
101 title = title[:-len(TITLE_SUFFIX)]
102 return title
103
104 def _extract_description(self, html):
105 DESCRIPTION_REGEX = r'''(?sx)
106 <div\s+class="entry-content">\s*
107 <div\s+id="entry-body">\s*
108 (?P<description>.+?)\s*
109 </div>\s*
110 </div>
111 '''
112 m = re.search(DESCRIPTION_REGEX, html)
113 if m is not None:
114 return m.group('description')
115 return self._html_search_meta('description', html, 'description')
116
117 def _extract_duration(self, html):
118 m = re.search(r'data-video_duration="(?P<hours>\d{2}):(?P<minutes>\d{2}):(?P<seconds>\d{2})"', html)
119 return ((int(m.group('hours')) * 60 * 60) + (int(m.group('minutes')) * 60) + int(m.group('seconds'))) if m else None
120
121 def _extract_slides(self, html):
122 m = re.search(r'<a href="(?P<slidesurl>[^"]+)" class="slides">Slides</a>', html)
123 return m.group('slidesurl') if m is not None else None
124
125 def _extract_zip(self, html):
126 m = re.search(r'<a href="(?P<zipurl>[^"]+)" class="zip">Zip</a>', html)
127 return m.group('zipurl') if m is not None else None
128
129 def _extract_avg_rating(self, html):
130 m = re.search(r'<p class="avg-rating">Avg Rating: <span>(?P<avgrating>[^<]+)</span></p>', html)
131 return float(m.group('avgrating')) if m is not None else 0
132
133 def _extract_rating_count(self, html):
134 m = re.search(r'<div class="rating-count">\((?P<ratingcount>[^<]+)\)</div>', html)
135 return int(self._fix_count(m.group('ratingcount'))) if m is not None else 0
136
137 def _extract_view_count(self, html):
138 m = re.search(r'<li class="views">\s*<span class="count">(?P<viewcount>[^<]+)</span> Views\s*</li>', html)
139 return int(self._fix_count(m.group('viewcount'))) if m is not None else 0
140
141 def _extract_comment_count(self, html):
142 m = re.search(r'<li class="comments">\s*<a href="#comments">\s*<span class="count">(?P<commentcount>[^<]+)</span> Comments\s*</a>\s*</li>', html)
143 return int(self._fix_count(m.group('commentcount'))) if m is not None else 0
144
145 def _fix_count(self, count):
146 return int(str(count).replace(',', '')) if count is not None else None
147
148 def _extract_authors(self, html):
149 m = re.search(r'(?s)<li class="author">(.*?)</li>', html)
150 if m is None:
151 return None
152 return re.findall(r'<a href="/Niners/[^"]+">([^<]+)</a>', m.group(1))
153
154 def _extract_session_code(self, html):
155 m = re.search(r'<li class="code">\s*(?P<code>.+?)\s*</li>', html)
156 return m.group('code') if m is not None else None
157
158 def _extract_session_day(self, html):
159 m = re.search(r'<li class="day">\s*<a href="/Events/[^"]+">(?P<day>[^<]+)</a>\s*</li>', html)
160 return m.group('day') if m is not None else None
161
162 def _extract_session_room(self, html):
163 m = re.search(r'<li class="room">\s*(?P<room>.+?)\s*</li>', html)
164 return m.group('room') if m is not None else None
165
166 def _extract_session_speakers(self, html):
167 return re.findall(r'<a href="/Events/Speakers/[^"]+">([^<]+)</a>', html)
168
169 def _extract_content(self, html, content_path):
170 # Look for downloadable content
171 formats = self._formats_from_html(html)
172 slides = self._extract_slides(html)
173 zip_ = self._extract_zip(html)
174
175 # Nothing to download
176 if len(formats) == 0 and slides is None and zip_ is None:
177 self._downloader.report_warning('None of recording, slides or zip are available for %s' % content_path)
178 return
179
180 # Extract meta
181 title = self._extract_title(html)
182 description = self._extract_description(html)
183 thumbnail = self._og_search_thumbnail(html)
184 duration = self._extract_duration(html)
185 avg_rating = self._extract_avg_rating(html)
186 rating_count = self._extract_rating_count(html)
187 view_count = self._extract_view_count(html)
188 comment_count = self._extract_comment_count(html)
189
190 common = {'_type': 'video',
191 'id': content_path,
192 'description': description,
193 'thumbnail': thumbnail,
194 'duration': duration,
195 'avg_rating': avg_rating,
196 'rating_count': rating_count,
197 'view_count': view_count,
198 'comment_count': comment_count,
199 }
200
201 result = []
202
203 if slides is not None:
204 d = common.copy()
205 d.update({ 'title': title + '-Slides', 'url': slides })
206 result.append(d)
207
208 if zip_ is not None:
209 d = common.copy()
210 d.update({ 'title': title + '-Zip', 'url': zip_ })
211 result.append(d)
212
213 if len(formats) > 0:
214 d = common.copy()
215 d.update({ 'title': title, 'formats': formats })
216 result.append(d)
217
218 return result
219
220 def _extract_entry_item(self, html, content_path):
221 contents = self._extract_content(html, content_path)
222 if contents is None:
223 return contents
224
225 authors = self._extract_authors(html)
226
227 for content in contents:
228 content['authors'] = authors
229
230 return contents
231
232 def _extract_session(self, html, content_path):
233 contents = self._extract_content(html, content_path)
234 if contents is None:
235 return contents
236
237 session_meta = {'session_code': self._extract_session_code(html),
238 'session_day': self._extract_session_day(html),
239 'session_room': self._extract_session_room(html),
240 'session_speakers': self._extract_session_speakers(html),
241 }
242
243 for content in contents:
244 content.update(session_meta)
245
246 return contents
247
248 def _extract_list(self, content_path):
249 rss = self._download_xml(self._RSS_URL % content_path, content_path, 'Downloading RSS')
250 entries = [self.url_result(session_url.text, 'Channel9')
251 for session_url in rss.findall('./channel/item/link')]
252 title_text = rss.find('./channel/title').text
253 return self.playlist_result(entries, content_path, title_text)
254
255 def _real_extract(self, url):
256 mobj = re.match(self._VALID_URL, url)
257 content_path = mobj.group('contentpath')
258
259 webpage = self._download_webpage(url, content_path, 'Downloading web page')
260
261 page_type_m = re.search(r'<meta name="Search.PageType" content="(?P<pagetype>[^"]+)"/>', webpage)
262 if page_type_m is None:
263 raise ExtractorError('Search.PageType not found, don\'t know how to process this page', expected=True)
264
265 page_type = page_type_m.group('pagetype')
266 if page_type == 'List': # List page, may contain list of 'item'-like objects
267 return self._extract_list(content_path)
268 elif page_type == 'Entry.Item': # Any 'item'-like page, may contain downloadable content
269 return self._extract_entry_item(webpage, content_path)
270 elif page_type == 'Session': # Event session page, may contain downloadable content
271 return self._extract_session(webpage, content_path)
272 else:
273 raise ExtractorError('Unexpected Search.PageType %s' % page_type, expected=True)