_ Git - youtube-dl/blob - youtube_dl/extractor/pluralsight.py

   1 from __future__ import unicode_literals
   2
   3 import collections
   4 import json
   5 import os
   6 import random
   7 import re
   8
   9 from .common import InfoExtractor
  10 from ..compat import (
  11     compat_str,
  12     compat_urlparse,
  13 )
  14 from ..utils import (
  15     ExtractorError,
  16     float_or_none,
  17     int_or_none,
  18     parse_duration,
  19     qualities,
  20     srt_subtitles_timecode,
  21     urlencode_postdata,
  22 )
  23
  24
  25 class PluralsightBaseIE(InfoExtractor):
  26     _API_BASE = 'http://app.pluralsight.com'
  27
  28
  29 class PluralsightIE(PluralsightBaseIE):
  30     IE_NAME = 'pluralsight'
  31     _VALID_URL = r'https?://(?:(?:www|app)\.)?pluralsight\.com/training/player\?'
  32     _LOGIN_URL = 'https://app.pluralsight.com/id/'
  33
  34     _NETRC_MACHINE = 'pluralsight'
  35
  36     _TESTS = [{
  37         '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',
  38         'md5': '4d458cf5cf4c593788672419a8dd4cf8',
  39         'info_dict': {
  40             'id': 'hosting-sql-server-windows-azure-iaas-m7-mgmt-04',
  41             'ext': 'mp4',
  42             'title': 'Management of SQL Server - Demo Monitoring',
  43             'duration': 338,
  44         },
  45         'skip': 'Requires pluralsight account credentials',
  46     }, {
  47         'url': 'https://app.pluralsight.com/training/player?course=angularjs-get-started&author=scott-allen&name=angularjs-get-started-m1-introduction&clip=0&mode=live',
  48         'only_matching': True,
  49     }, {
  50         # available without pluralsight account
  51         'url': 'http://app.pluralsight.com/training/player?author=scott-allen&name=angularjs-get-started-m1-introduction&mode=live&clip=0&course=angularjs-get-started',
  52         'only_matching': True,
  53     }]
  54
  55     def _real_initialize(self):
  56         self._login()
  57
  58     def _login(self):
  59         (username, password) = self._get_login_info()
  60         if username is None:
  61             return
  62
  63         login_page = self._download_webpage(
  64             self._LOGIN_URL, None, 'Downloading login page')
  65
  66         login_form = self._hidden_inputs(login_page)
  67
  68         login_form.update({
  69             'Username': username,
  70             'Password': password,
  71         })
  72
  73         post_url = self._search_regex(
  74             r'<form[^>]+action=(["\'])(?P<url>.+?)\1', login_page,
  75             'post url', default=self._LOGIN_URL, group='url')
  76
  77         if not post_url.startswith('http'):
  78             post_url = compat_urlparse.urljoin(self._LOGIN_URL, post_url)
  79
  80         response = self._download_webpage(
  81             post_url, None, 'Logging in as %s' % username,
  82             data=urlencode_postdata(login_form),
  83             headers={'Content-Type': 'application/x-www-form-urlencoded'})
  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 _get_subtitles(self, author, clip_id, lang, name, duration, video_id):
  95         captions_post = {
  96             'a': author,
  97             'cn': clip_id,
  98             'lc': lang,
  99             'm': name,
 100         }
 101         captions = self._download_json(
 102             '%s/training/Player/Captions' % self._API_BASE, video_id,
 103             'Downloading captions JSON', 'Unable to download captions JSON',
 104             fatal=False, data=json.dumps(captions_post).encode('utf-8'),
 105             headers={'Content-Type': 'application/json;charset=utf-8'})
 106         if captions:
 107             return {
 108                 lang: [{
 109                     'ext': 'json',
 110                     'data': json.dumps(captions),
 111                 }, {
 112                     'ext': 'srt',
 113                     'data': self._convert_subtitles(duration, captions),
 114                 }]
 115             }
 116
 117     @staticmethod
 118     def _convert_subtitles(duration, subs):
 119         srt = ''
 120         for num, current in enumerate(subs):
 121             current = subs[num]
 122             start, text = float_or_none(
 123                 current.get('DisplayTimeOffset')), current.get('Text')
 124             if start is None or text is None:
 125                 continue
 126             end = duration if num == len(subs) - 1 else float_or_none(
 127                 subs[num + 1].get('DisplayTimeOffset'))
 128             if end is None:
 129                 continue
 130             srt += os.linesep.join(
 131                 (
 132                     '%d' % num,
 133                     '%s --> %s' % (
 134                         srt_subtitles_timecode(start),
 135                         srt_subtitles_timecode(end)),
 136                     text,
 137                     os.linesep,
 138                 ))
 139         return srt
 140
 141     def _real_extract(self, url):
 142         qs = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
 143
 144         author = qs.get('author', [None])[0]
 145         name = qs.get('name', [None])[0]
 146         clip_id = qs.get('clip', [None])[0]
 147         course = qs.get('course', [None])[0]
 148
 149         if any(not f for f in (author, name, clip_id, course,)):
 150             raise ExtractorError('Invalid URL', expected=True)
 151
 152         display_id = '%s-%s' % (name, clip_id)
 153
 154         webpage = self._download_webpage(url, display_id)
 155
 156         modules = self._search_regex(
 157             r'moduleCollection\s*:\s*new\s+ModuleCollection\((\[.+?\])\s*,\s*\$rootScope\)',
 158             webpage, 'modules', default=None)
 159
 160         if modules:
 161             collection = self._parse_json(modules, display_id)
 162         else:
 163             # Webpage may be served in different layout (see
 164             # https://github.com/rg3/youtube-dl/issues/7607)
 165             collection = self._parse_json(
 166                 self._search_regex(
 167                     r'var\s+initialState\s*=\s*({.+?});\n', webpage, 'initial state'),
 168                 display_id)['course']['modules']
 169
 170         module, clip = None, None
 171
 172         for module_ in collection:
 173             if name in (module_.get('moduleName'), module_.get('name')):
 174                 module = module_
 175                 for clip_ in module_.get('clips', []):
 176                     clip_index = clip_.get('clipIndex')
 177                     if clip_index is None:
 178                         clip_index = clip_.get('index')
 179                     if clip_index is None:
 180                         continue
 181                     if compat_str(clip_index) == clip_id:
 182                         clip = clip_
 183                         break
 184
 185         if not clip:
 186             raise ExtractorError('Unable to resolve clip')
 187
 188         title = '%s - %s' % (module['title'], clip['title'])
 189
 190         QUALITIES = {
 191             'low': {'width': 640, 'height': 480},
 192             'medium': {'width': 848, 'height': 640},
 193             'high': {'width': 1024, 'height': 768},
 194             'high-widescreen': {'width': 1280, 'height': 720},
 195         }
 196
 197         QUALITIES_PREFERENCE = ('low', 'medium', 'high', 'high-widescreen',)
 198         quality_key = qualities(QUALITIES_PREFERENCE)
 199
 200         AllowedQuality = collections.namedtuple('AllowedQuality', ['ext', 'qualities'])
 201
 202         ALLOWED_QUALITIES = (
 203             AllowedQuality('webm', ['high', ]),
 204             AllowedQuality('mp4', ['low', 'medium', 'high', ]),
 205         )
 206
 207         # Some courses also offer widescreen resolution for high quality (see
 208         # https://github.com/rg3/youtube-dl/issues/7766)
 209         widescreen = True if re.search(
 210             r'courseSupportsWidescreenVideoFormats\s*:\s*true', webpage) else False
 211         best_quality = 'high-widescreen' if widescreen else 'high'
 212         if widescreen:
 213             for allowed_quality in ALLOWED_QUALITIES:
 214                 allowed_quality.qualities.append(best_quality)
 215
 216         # In order to minimize the number of calls to ViewClip API and reduce
 217         # the probability of being throttled or banned by Pluralsight we will request
 218         # only single format until formats listing was explicitly requested.
 219         if self._downloader.params.get('listformats', False):
 220             allowed_qualities = ALLOWED_QUALITIES
 221         else:
 222             def guess_allowed_qualities():
 223                 req_format = self._downloader.params.get('format') or 'best'
 224                 req_format_split = req_format.split('-', 1)
 225                 if len(req_format_split) > 1:
 226                     req_ext, req_quality = req_format_split
 227                     for allowed_quality in ALLOWED_QUALITIES:
 228                         if req_ext == allowed_quality.ext and req_quality in allowed_quality.qualities:
 229                             return (AllowedQuality(req_ext, (req_quality, )), )
 230                 req_ext = 'webm' if self._downloader.params.get('prefer_free_formats') else 'mp4'
 231                 return (AllowedQuality(req_ext, (best_quality, )), )
 232             allowed_qualities = guess_allowed_qualities()
 233
 234         formats = []
 235         for ext, qualities_ in allowed_qualities:
 236             for quality in qualities_:
 237                 f = QUALITIES[quality].copy()
 238                 clip_post = {
 239                     'a': author,
 240                     'cap': 'false',
 241                     'cn': clip_id,
 242                     'course': course,
 243                     'lc': 'en',
 244                     'm': name,
 245                     'mt': ext,
 246                     'q': '%dx%d' % (f['width'], f['height']),
 247                 }
 248                 format_id = '%s-%s' % (ext, quality)
 249                 clip_url = self._download_webpage(
 250                     '%s/training/Player/ViewClip' % self._API_BASE, display_id,
 251                     'Downloading %s URL' % format_id, fatal=False,
 252                     data=json.dumps(clip_post).encode('utf-8'),
 253                     headers={'Content-Type': 'application/json;charset=utf-8'})
 254
 255                 # Pluralsight tracks multiple sequential calls to ViewClip API and start
 256                 # to return 429 HTTP errors after some time (see
 257                 # https://github.com/rg3/youtube-dl/pull/6989). Moreover it may even lead
 258                 # to account ban (see https://github.com/rg3/youtube-dl/issues/6842).
 259                 # To somewhat reduce the probability of these consequences
 260                 # we will sleep random amount of time before each call to ViewClip.
 261                 self._sleep(
 262                     random.randint(2, 5), display_id,
 263                     '%(video_id)s: Waiting for %(timeout)s seconds to avoid throttling')
 264
 265                 if not clip_url:
 266                     continue
 267                 f.update({
 268                     'url': clip_url,
 269                     'ext': ext,
 270                     'format_id': format_id,
 271                     'quality': quality_key(quality),
 272                 })
 273                 formats.append(f)
 274         self._sort_formats(formats)
 275
 276         duration = int_or_none(
 277             clip.get('duration')) or parse_duration(clip.get('formattedDuration'))
 278
 279         # TODO: other languages?
 280         subtitles = self.extract_subtitles(
 281             author, clip_id, 'en', name, duration, display_id)
 282
 283         return {
 284             'id': clip.get('clipName') or clip['name'],
 285             'title': title,
 286             'duration': duration,
 287             'creator': author,
 288             'formats': formats,
 289             'subtitles': subtitles,
 290         }
 291
 292
 293 class PluralsightCourseIE(PluralsightBaseIE):
 294     IE_NAME = 'pluralsight:course'
 295     _VALID_URL = r'https?://(?:(?:www|app)\.)?pluralsight\.com/(?:library/)?courses/(?P<id>[^/]+)'
 296     _TESTS = [{
 297         # Free course from Pluralsight Starter Subscription for Microsoft TechNet
 298         # https://offers.pluralsight.com/technet?loc=zTS3z&prod=zOTprodz&tech=zOttechz&prog=zOTprogz&type=zSOz&media=zOTmediaz&country=zUSz
 299         'url': 'http://www.pluralsight.com/courses/hosting-sql-server-windows-azure-iaas',
 300         'info_dict': {
 301             'id': 'hosting-sql-server-windows-azure-iaas',
 302             'title': 'Hosting SQL Server in Microsoft Azure IaaS Fundamentals',
 303             'description': 'md5:61b37e60f21c4b2f91dc621a977d0986',
 304         },
 305         'playlist_count': 31,
 306     }, {
 307         # available without pluralsight account
 308         'url': 'https://www.pluralsight.com/courses/angularjs-get-started',
 309         'only_matching': True,
 310     }, {
 311         'url': 'https://app.pluralsight.com/library/courses/understanding-microsoft-azure-amazon-aws/table-of-contents',
 312         'only_matching': True,
 313     }]
 314
 315     def _real_extract(self, url):
 316         course_id = self._match_id(url)
 317
 318         # TODO: PSM cookie
 319
 320         course = self._download_json(
 321             '%s/data/course/%s' % (self._API_BASE, course_id),
 322             course_id, 'Downloading course JSON')
 323
 324         title = course['title']
 325         description = course.get('description') or course.get('shortDescription')
 326
 327         course_data = self._download_json(
 328             '%s/data/course/content/%s' % (self._API_BASE, course_id),
 329             course_id, 'Downloading course data JSON')
 330
 331         entries = []
 332         for num, module in enumerate(course_data, 1):
 333             for clip in module.get('clips', []):
 334                 player_parameters = clip.get('playerParameters')
 335                 if not player_parameters:
 336                     continue
 337                 entries.append({
 338                     '_type': 'url_transparent',
 339                     'url': '%s/training/player?%s' % (self._API_BASE, player_parameters),
 340                     'ie_key': PluralsightIE.ie_key(),
 341                     'chapter': module.get('title'),
 342                     'chapter_number': num,
 343                     'chapter_id': module.get('moduleRef'),
 344                 })
 345
 346         return self.playlist_result(entries, course_id, title, description)