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[youtubedl] / youtube_dl / extractor / pluralsight.py
1 from __future__ import unicode_literals
2
3 import re
4 import json
5 import random
6 import collections
7
8 from .common import InfoExtractor
9 from ..compat import (
10 compat_str,
11 compat_urlparse,
12 )
13 from ..utils import (
14 ExtractorError,
15 int_or_none,
16 parse_duration,
17 qualities,
18 sanitized_Request,
19 urlencode_postdata,
20 )
21
22
23 class PluralsightBaseIE(InfoExtractor):
24 _API_BASE = 'http://app.pluralsight.com'
25
26
27 class PluralsightIE(PluralsightBaseIE):
28 IE_NAME = 'pluralsight'
29 _VALID_URL = r'https?://(?:(?:www|app)\.)?pluralsight\.com/training/player\?'
30 _LOGIN_URL = 'https://app.pluralsight.com/id/'
31
32 _NETRC_MACHINE = 'pluralsight'
33
34 _TESTS = [{
35 'url': 'http://www.pluralsight.com/training/player?author=mike-mckeown&name=hosting-sql-server-windows-azure-iaas-m7-mgmt&mode=live&clip=3&course=hosting-sql-server-windows-azure-iaas',
36 'md5': '4d458cf5cf4c593788672419a8dd4cf8',
37 'info_dict': {
38 'id': 'hosting-sql-server-windows-azure-iaas-m7-mgmt-04',
39 'ext': 'mp4',
40 'title': 'Management of SQL Server - Demo Monitoring',
41 'duration': 338,
42 },
43 'skip': 'Requires pluralsight account credentials',
44 }, {
45 'url': 'https://app.pluralsight.com/training/player?course=angularjs-get-started&author=scott-allen&name=angularjs-get-started-m1-introduction&clip=0&mode=live',
46 'only_matching': True,
47 }, {
48 # available without pluralsight account
49 'url': 'http://app.pluralsight.com/training/player?author=scott-allen&name=angularjs-get-started-m1-introduction&mode=live&clip=0&course=angularjs-get-started',
50 'only_matching': True,
51 }]
52
53 def _real_initialize(self):
54 self._login()
55
56 def _login(self):
57 (username, password) = self._get_login_info()
58 if username is None:
59 return
60
61 login_page = self._download_webpage(
62 self._LOGIN_URL, None, 'Downloading login page')
63
64 login_form = self._hidden_inputs(login_page)
65
66 login_form.update({
67 'Username': username,
68 'Password': password,
69 })
70
71 post_url = self._search_regex(
72 r'<form[^>]+action=(["\'])(?P<url>.+?)\1', login_page,
73 'post url', default=self._LOGIN_URL, group='url')
74
75 if not post_url.startswith('http'):
76 post_url = compat_urlparse.urljoin(self._LOGIN_URL, post_url)
77
78 request = sanitized_Request(
79 post_url, urlencode_postdata(login_form))
80 request.add_header('Content-Type', 'application/x-www-form-urlencoded')
81
82 response = self._download_webpage(
83 request, None, 'Logging in as %s' % username)
84
85 error = self._search_regex(
86 r'<span[^>]+class="field-validation-error"[^>]*>([^<]+)</span>',
87 response, 'error message', default=None)
88 if error:
89 raise ExtractorError('Unable to login: %s' % error, expected=True)
90
91 if all(p not in response for p in ('__INITIAL_STATE__', '"currentUser"')):
92 raise ExtractorError('Unable to log in')
93
94 def _real_extract(self, url):
95 qs = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
96
97 author = qs.get('author', [None])[0]
98 name = qs.get('name', [None])[0]
99 clip_id = qs.get('clip', [None])[0]
100 course = qs.get('course', [None])[0]
101
102 if any(not f for f in (author, name, clip_id, course,)):
103 raise ExtractorError('Invalid URL', expected=True)
104
105 display_id = '%s-%s' % (name, clip_id)
106
107 webpage = self._download_webpage(url, display_id)
108
109 modules = self._search_regex(
110 r'moduleCollection\s*:\s*new\s+ModuleCollection\((\[.+?\])\s*,\s*\$rootScope\)',
111 webpage, 'modules', default=None)
112
113 if modules:
114 collection = self._parse_json(modules, display_id)
115 else:
116 # Webpage may be served in different layout (see
117 # https://github.com/rg3/youtube-dl/issues/7607)
118 collection = self._parse_json(
119 self._search_regex(
120 r'var\s+initialState\s*=\s*({.+?});\n', webpage, 'initial state'),
121 display_id)['course']['modules']
122
123 module, clip = None, None
124
125 for module_ in collection:
126 if name in (module_.get('moduleName'), module_.get('name')):
127 module = module_
128 for clip_ in module_.get('clips', []):
129 clip_index = clip_.get('clipIndex')
130 if clip_index is None:
131 clip_index = clip_.get('index')
132 if clip_index is None:
133 continue
134 if compat_str(clip_index) == clip_id:
135 clip = clip_
136 break
137
138 if not clip:
139 raise ExtractorError('Unable to resolve clip')
140
141 QUALITIES = {
142 'low': {'width': 640, 'height': 480},
143 'medium': {'width': 848, 'height': 640},
144 'high': {'width': 1024, 'height': 768},
145 'high-widescreen': {'width': 1280, 'height': 720},
146 }
147
148 QUALITIES_PREFERENCE = ('low', 'medium', 'high', 'high-widescreen',)
149 quality_key = qualities(QUALITIES_PREFERENCE)
150
151 AllowedQuality = collections.namedtuple('AllowedQuality', ['ext', 'qualities'])
152
153 ALLOWED_QUALITIES = (
154 AllowedQuality('webm', ['high', ]),
155 AllowedQuality('mp4', ['low', 'medium', 'high', ]),
156 )
157
158 # Some courses also offer widescreen resolution for high quality (see
159 # https://github.com/rg3/youtube-dl/issues/7766)
160 widescreen = True if re.search(
161 r'courseSupportsWidescreenVideoFormats\s*:\s*true', webpage) else False
162 best_quality = 'high-widescreen' if widescreen else 'high'
163 if widescreen:
164 for allowed_quality in ALLOWED_QUALITIES:
165 allowed_quality.qualities.append(best_quality)
166
167 # In order to minimize the number of calls to ViewClip API and reduce
168 # the probability of being throttled or banned by Pluralsight we will request
169 # only single format until formats listing was explicitly requested.
170 if self._downloader.params.get('listformats', False):
171 allowed_qualities = ALLOWED_QUALITIES
172 else:
173 def guess_allowed_qualities():
174 req_format = self._downloader.params.get('format') or 'best'
175 req_format_split = req_format.split('-', 1)
176 if len(req_format_split) > 1:
177 req_ext, req_quality = req_format_split
178 for allowed_quality in ALLOWED_QUALITIES:
179 if req_ext == allowed_quality.ext and req_quality in allowed_quality.qualities:
180 return (AllowedQuality(req_ext, (req_quality, )), )
181 req_ext = 'webm' if self._downloader.params.get('prefer_free_formats') else 'mp4'
182 return (AllowedQuality(req_ext, (best_quality, )), )
183 allowed_qualities = guess_allowed_qualities()
184
185 formats = []
186 for ext, qualities_ in allowed_qualities:
187 for quality in qualities_:
188 f = QUALITIES[quality].copy()
189 clip_post = {
190 'a': author,
191 'cap': 'false',
192 'cn': clip_id,
193 'course': course,
194 'lc': 'en',
195 'm': name,
196 'mt': ext,
197 'q': '%dx%d' % (f['width'], f['height']),
198 }
199 request = sanitized_Request(
200 '%s/training/Player/ViewClip' % self._API_BASE,
201 json.dumps(clip_post).encode('utf-8'))
202 request.add_header('Content-Type', 'application/json;charset=utf-8')
203 format_id = '%s-%s' % (ext, quality)
204 clip_url = self._download_webpage(
205 request, display_id, 'Downloading %s URL' % format_id, fatal=False)
206
207 # Pluralsight tracks multiple sequential calls to ViewClip API and start
208 # to return 429 HTTP errors after some time (see
209 # https://github.com/rg3/youtube-dl/pull/6989). Moreover it may even lead
210 # to account ban (see https://github.com/rg3/youtube-dl/issues/6842).
211 # To somewhat reduce the probability of these consequences
212 # we will sleep random amount of time before each call to ViewClip.
213 self._sleep(
214 random.randint(2, 5), display_id,
215 '%(video_id)s: Waiting for %(timeout)s seconds to avoid throttling')
216
217 if not clip_url:
218 continue
219 f.update({
220 'url': clip_url,
221 'ext': ext,
222 'format_id': format_id,
223 'quality': quality_key(quality),
224 })
225 formats.append(f)
226 self._sort_formats(formats)
227
228 # TODO: captions
229 # http://www.pluralsight.com/training/Player/ViewClip + cap = true
230 # or
231 # http://www.pluralsight.com/training/Player/Captions
232 # { a = author, cn = clip_id, lc = end, m = name }
233
234 return {
235 'id': clip.get('clipName') or clip['name'],
236 'title': '%s - %s' % (module['title'], clip['title']),
237 'duration': int_or_none(clip.get('duration')) or parse_duration(clip.get('formattedDuration')),
238 'creator': author,
239 'formats': formats
240 }
241
242
243 class PluralsightCourseIE(PluralsightBaseIE):
244 IE_NAME = 'pluralsight:course'
245 _VALID_URL = r'https?://(?:(?:www|app)\.)?pluralsight\.com/(?:library/)?courses/(?P<id>[^/]+)'
246 _TESTS = [{
247 # Free course from Pluralsight Starter Subscription for Microsoft TechNet
248 # https://offers.pluralsight.com/technet?loc=zTS3z&prod=zOTprodz&tech=zOttechz&prog=zOTprogz&type=zSOz&media=zOTmediaz&country=zUSz
249 'url': 'http://www.pluralsight.com/courses/hosting-sql-server-windows-azure-iaas',
250 'info_dict': {
251 'id': 'hosting-sql-server-windows-azure-iaas',
252 'title': 'Hosting SQL Server in Microsoft Azure IaaS Fundamentals',
253 'description': 'md5:61b37e60f21c4b2f91dc621a977d0986',
254 },
255 'playlist_count': 31,
256 }, {
257 # available without pluralsight account
258 'url': 'https://www.pluralsight.com/courses/angularjs-get-started',
259 'only_matching': True,
260 }, {
261 'url': 'https://app.pluralsight.com/library/courses/understanding-microsoft-azure-amazon-aws/table-of-contents',
262 'only_matching': True,
263 }]
264
265 def _real_extract(self, url):
266 course_id = self._match_id(url)
267
268 # TODO: PSM cookie
269
270 course = self._download_json(
271 '%s/data/course/%s' % (self._API_BASE, course_id),
272 course_id, 'Downloading course JSON')
273
274 title = course['title']
275 description = course.get('description') or course.get('shortDescription')
276
277 course_data = self._download_json(
278 '%s/data/course/content/%s' % (self._API_BASE, course_id),
279 course_id, 'Downloading course data JSON')
280
281 entries = []
282 for num, module in enumerate(course_data, 1):
283 for clip in module.get('clips', []):
284 player_parameters = clip.get('playerParameters')
285 if not player_parameters:
286 continue
287 entries.append({
288 '_type': 'url_transparent',
289 'url': '%s/training/player?%s' % (self._API_BASE, player_parameters),
290 'ie_key': PluralsightIE.ie_key(),
291 'chapter': module.get('title'),
292 'chapter_number': num,
293 'chapter_id': module.get('moduleRef'),
294 })
295
296 return self.playlist_result(entries, course_id, title, description)