Raphaël G. Git Repositories - youtubedl/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
   8 from .common import InfoExtractor
   9 from ..compat import (
  10     compat_str,
  11     compat_urlparse,
  12 )
  13 from ..utils import (
  14     dict_get,
  15     ExtractorError,
  16     float_or_none,
  17     int_or_none,
  18     parse_duration,
  19     qualities,
  20     srt_subtitles_timecode,
  21     try_get,
  22     update_url_query,
  23     urlencode_postdata,
  24 )
  25
  26
  27 class PluralsightBaseIE(InfoExtractor):
  28     _API_BASE = 'https://app.pluralsight.com'
  29
  30     def _download_course(self, course_id, url, display_id):
  31         try:
  32             return self._download_course_rpc(course_id, url, display_id)
  33         except ExtractorError:
  34             # Old API fallback
  35             return self._download_json(
  36                 'https://app.pluralsight.com/player/user/api/v1/player/payload',
  37                 display_id, data=urlencode_postdata({'courseId': course_id}),
  38                 headers={'Referer': url})
  39
  40     def _download_course_rpc(self, course_id, url, display_id):
  41         response = self._download_json(
  42             '%s/player/functions/rpc' % self._API_BASE, display_id,
  43             'Downloading course JSON',
  44             data=json.dumps({
  45                 'fn': 'bootstrapPlayer',
  46                 'payload': {
  47                     'courseId': course_id,
  48                 },
  49             }).encode('utf-8'),
  50             headers={
  51                 'Content-Type': 'application/json;charset=utf-8',
  52                 'Referer': url,
  53             })
  54
  55         course = try_get(response, lambda x: x['payload']['course'], dict)
  56         if course:
  57             return course
  58
  59         raise ExtractorError(
  60             '%s said: %s' % (self.IE_NAME, response['error']['message']),
  61             expected=True)
  62
  63
  64 class PluralsightIE(PluralsightBaseIE):
  65     IE_NAME = 'pluralsight'
  66     _VALID_URL = r'https?://(?:(?:www|app)\.)?pluralsight\.com/(?:training/)?player\?'
  67     _LOGIN_URL = 'https://app.pluralsight.com/id/'
  68
  69     _NETRC_MACHINE = 'pluralsight'
  70
  71     _TESTS = [{
  72         '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',
  73         'md5': '4d458cf5cf4c593788672419a8dd4cf8',
  74         'info_dict': {
  75             'id': 'hosting-sql-server-windows-azure-iaas-m7-mgmt-04',
  76             'ext': 'mp4',
  77             'title': 'Demo Monitoring',
  78             'duration': 338,
  79         },
  80         'skip': 'Requires pluralsight account credentials',
  81     }, {
  82         'url': 'https://app.pluralsight.com/training/player?course=angularjs-get-started&author=scott-allen&name=angularjs-get-started-m1-introduction&clip=0&mode=live',
  83         'only_matching': True,
  84     }, {
  85         # available without pluralsight account
  86         'url': 'http://app.pluralsight.com/training/player?author=scott-allen&name=angularjs-get-started-m1-introduction&mode=live&clip=0&course=angularjs-get-started',
  87         'only_matching': True,
  88     }, {
  89         'url': 'https://app.pluralsight.com/player?course=ccna-intro-networking&author=ross-bagurdes&name=ccna-intro-networking-m06&clip=0',
  90         'only_matching': True,
  91     }]
  92
  93     def _real_initialize(self):
  94         self._login()
  95
  96     def _login(self):
  97         username, password = self._get_login_info()
  98         if username is None:
  99             return
 100
 101         login_page = self._download_webpage(
 102             self._LOGIN_URL, None, 'Downloading login page')
 103
 104         login_form = self._hidden_inputs(login_page)
 105
 106         login_form.update({
 107             'Username': username,
 108             'Password': password,
 109         })
 110
 111         post_url = self._search_regex(
 112             r'<form[^>]+action=(["\'])(?P<url>.+?)\1', login_page,
 113             'post url', default=self._LOGIN_URL, group='url')
 114
 115         if not post_url.startswith('http'):
 116             post_url = compat_urlparse.urljoin(self._LOGIN_URL, post_url)
 117
 118         response = self._download_webpage(
 119             post_url, None, 'Logging in',
 120             data=urlencode_postdata(login_form),
 121             headers={'Content-Type': 'application/x-www-form-urlencoded'})
 122
 123         error = self._search_regex(
 124             r'<span[^>]+class="field-validation-error"[^>]*>([^<]+)</span>',
 125             response, 'error message', default=None)
 126         if error:
 127             raise ExtractorError('Unable to login: %s' % error, expected=True)
 128
 129         if all(p not in response for p in ('__INITIAL_STATE__', '"currentUser"')):
 130             BLOCKED = 'Your account has been blocked due to suspicious activity'
 131             if BLOCKED in response:
 132                 raise ExtractorError(
 133                     'Unable to login: %s' % BLOCKED, expected=True)
 134             MUST_AGREE = 'To continue using Pluralsight, you must agree to'
 135             if any(p in response for p in (MUST_AGREE, '>Disagree<', '>Agree<')):
 136                 raise ExtractorError(
 137                     'Unable to login: %s some documents. Go to pluralsight.com, '
 138                     'log in and agree with what Pluralsight requires.'
 139                     % MUST_AGREE, expected=True)
 140
 141             raise ExtractorError('Unable to log in')
 142
 143     def _get_subtitles(self, author, clip_idx, lang, name, duration, video_id):
 144         captions_post = {
 145             'a': author,
 146             'cn': clip_idx,
 147             'lc': lang,
 148             'm': name,
 149         }
 150         captions = self._download_json(
 151             '%s/player/retrieve-captions' % self._API_BASE, video_id,
 152             'Downloading captions JSON', 'Unable to download captions JSON',
 153             fatal=False, data=json.dumps(captions_post).encode('utf-8'),
 154             headers={'Content-Type': 'application/json;charset=utf-8'})
 155         if captions:
 156             return {
 157                 lang: [{
 158                     'ext': 'json',
 159                     'data': json.dumps(captions),
 160                 }, {
 161                     'ext': 'srt',
 162                     'data': self._convert_subtitles(duration, captions),
 163                 }]
 164             }
 165
 166     @staticmethod
 167     def _convert_subtitles(duration, subs):
 168         srt = ''
 169         TIME_OFFSET_KEYS = ('displayTimeOffset', 'DisplayTimeOffset')
 170         TEXT_KEYS = ('text', 'Text')
 171         for num, current in enumerate(subs):
 172             current = subs[num]
 173             start, text = (
 174                 float_or_none(dict_get(current, TIME_OFFSET_KEYS, skip_false_values=False)),
 175                 dict_get(current, TEXT_KEYS))
 176             if start is None or text is None:
 177                 continue
 178             end = duration if num == len(subs) - 1 else float_or_none(
 179                 dict_get(subs[num + 1], TIME_OFFSET_KEYS, skip_false_values=False))
 180             if end is None:
 181                 continue
 182             srt += os.linesep.join(
 183                 (
 184                     '%d' % num,
 185                     '%s --> %s' % (
 186                         srt_subtitles_timecode(start),
 187                         srt_subtitles_timecode(end)),
 188                     text,
 189                     os.linesep,
 190                 ))
 191         return srt
 192
 193     def _real_extract(self, url):
 194         qs = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
 195
 196         author = qs.get('author', [None])[0]
 197         name = qs.get('name', [None])[0]
 198         clip_idx = qs.get('clip', [None])[0]
 199         course_name = qs.get('course', [None])[0]
 200
 201         if any(not f for f in (author, name, clip_idx, course_name,)):
 202             raise ExtractorError('Invalid URL', expected=True)
 203
 204         display_id = '%s-%s' % (name, clip_idx)
 205
 206         course = self._download_course(course_name, url, display_id)
 207
 208         collection = course['modules']
 209
 210         clip = None
 211
 212         for module_ in collection:
 213             if name in (module_.get('moduleName'), module_.get('name')):
 214                 for clip_ in module_.get('clips', []):
 215                     clip_index = clip_.get('clipIndex')
 216                     if clip_index is None:
 217                         clip_index = clip_.get('index')
 218                     if clip_index is None:
 219                         continue
 220                     if compat_str(clip_index) == clip_idx:
 221                         clip = clip_
 222                         break
 223
 224         if not clip:
 225             raise ExtractorError('Unable to resolve clip')
 226
 227         title = clip['title']
 228         clip_id = clip.get('clipName') or clip.get('name') or clip['clipId']
 229
 230         QUALITIES = {
 231             'low': {'width': 640, 'height': 480},
 232             'medium': {'width': 848, 'height': 640},
 233             'high': {'width': 1024, 'height': 768},
 234             'high-widescreen': {'width': 1280, 'height': 720},
 235         }
 236
 237         QUALITIES_PREFERENCE = ('low', 'medium', 'high', 'high-widescreen',)
 238         quality_key = qualities(QUALITIES_PREFERENCE)
 239
 240         AllowedQuality = collections.namedtuple('AllowedQuality', ['ext', 'qualities'])
 241
 242         ALLOWED_QUALITIES = (
 243             AllowedQuality('webm', ['high', ]),
 244             AllowedQuality('mp4', ['low', 'medium', 'high', ]),
 245         )
 246
 247         # Some courses also offer widescreen resolution for high quality (see
 248         # https://github.com/rg3/youtube-dl/issues/7766)
 249         widescreen = course.get('supportsWideScreenVideoFormats') is True
 250         best_quality = 'high-widescreen' if widescreen else 'high'
 251         if widescreen:
 252             for allowed_quality in ALLOWED_QUALITIES:
 253                 allowed_quality.qualities.append(best_quality)
 254
 255         # In order to minimize the number of calls to ViewClip API and reduce
 256         # the probability of being throttled or banned by Pluralsight we will request
 257         # only single format until formats listing was explicitly requested.
 258         if self._downloader.params.get('listformats', False):
 259             allowed_qualities = ALLOWED_QUALITIES
 260         else:
 261             def guess_allowed_qualities():
 262                 req_format = self._downloader.params.get('format') or 'best'
 263                 req_format_split = req_format.split('-', 1)
 264                 if len(req_format_split) > 1:
 265                     req_ext, req_quality = req_format_split
 266                     req_quality = '-'.join(req_quality.split('-')[:2])
 267                     for allowed_quality in ALLOWED_QUALITIES:
 268                         if req_ext == allowed_quality.ext and req_quality in allowed_quality.qualities:
 269                             return (AllowedQuality(req_ext, (req_quality, )), )
 270                 req_ext = 'webm' if self._downloader.params.get('prefer_free_formats') else 'mp4'
 271                 return (AllowedQuality(req_ext, (best_quality, )), )
 272             allowed_qualities = guess_allowed_qualities()
 273
 274         formats = []
 275         for ext, qualities_ in allowed_qualities:
 276             for quality in qualities_:
 277                 f = QUALITIES[quality].copy()
 278                 clip_post = {
 279                     'author': author,
 280                     'includeCaptions': False,
 281                     'clipIndex': int(clip_idx),
 282                     'courseName': course_name,
 283                     'locale': 'en',
 284                     'moduleName': name,
 285                     'mediaType': ext,
 286                     'quality': '%dx%d' % (f['width'], f['height']),
 287                 }
 288                 format_id = '%s-%s' % (ext, quality)
 289                 viewclip = self._download_json(
 290                     '%s/video/clips/viewclip' % self._API_BASE, display_id,
 291                     'Downloading %s viewclip JSON' % format_id, fatal=False,
 292                     data=json.dumps(clip_post).encode('utf-8'),
 293                     headers={'Content-Type': 'application/json;charset=utf-8'})
 294
 295                 # Pluralsight tracks multiple sequential calls to ViewClip API and start
 296                 # to return 429 HTTP errors after some time (see
 297                 # https://github.com/rg3/youtube-dl/pull/6989). Moreover it may even lead
 298                 # to account ban (see https://github.com/rg3/youtube-dl/issues/6842).
 299                 # To somewhat reduce the probability of these consequences
 300                 # we will sleep random amount of time before each call to ViewClip.
 301                 self._sleep(
 302                     random.randint(2, 5), display_id,
 303                     '%(video_id)s: Waiting for %(timeout)s seconds to avoid throttling')
 304
 305                 if not viewclip:
 306                     continue
 307
 308                 clip_urls = viewclip.get('urls')
 309                 if not isinstance(clip_urls, list):
 310                     continue
 311
 312                 for clip_url_data in clip_urls:
 313                     clip_url = clip_url_data.get('url')
 314                     if not clip_url:
 315                         continue
 316                     cdn = clip_url_data.get('cdn')
 317                     clip_f = f.copy()
 318                     clip_f.update({
 319                         'url': clip_url,
 320                         'ext': ext,
 321                         'format_id': '%s-%s' % (format_id, cdn) if cdn else format_id,
 322                         'quality': quality_key(quality),
 323                         'source_preference': int_or_none(clip_url_data.get('rank')),
 324                     })
 325                     formats.append(clip_f)
 326
 327         self._sort_formats(formats)
 328
 329         duration = int_or_none(
 330             clip.get('duration')) or parse_duration(clip.get('formattedDuration'))
 331
 332         # TODO: other languages?
 333         subtitles = self.extract_subtitles(
 334             author, clip_idx, 'en', name, duration, display_id)
 335
 336         return {
 337             'id': clip_id,
 338             'title': title,
 339             'duration': duration,
 340             'creator': author,
 341             'formats': formats,
 342             'subtitles': subtitles,
 343         }
 344
 345
 346 class PluralsightCourseIE(PluralsightBaseIE):
 347     IE_NAME = 'pluralsight:course'
 348     _VALID_URL = r'https?://(?:(?:www|app)\.)?pluralsight\.com/(?:library/)?courses/(?P<id>[^/]+)'
 349     _TESTS = [{
 350         # Free course from Pluralsight Starter Subscription for Microsoft TechNet
 351         # https://offers.pluralsight.com/technet?loc=zTS3z&prod=zOTprodz&tech=zOttechz&prog=zOTprogz&type=zSOz&media=zOTmediaz&country=zUSz
 352         'url': 'http://www.pluralsight.com/courses/hosting-sql-server-windows-azure-iaas',
 353         'info_dict': {
 354             'id': 'hosting-sql-server-windows-azure-iaas',
 355             'title': 'Hosting SQL Server in Microsoft Azure IaaS Fundamentals',
 356             'description': 'md5:61b37e60f21c4b2f91dc621a977d0986',
 357         },
 358         'playlist_count': 31,
 359     }, {
 360         # available without pluralsight account
 361         'url': 'https://www.pluralsight.com/courses/angularjs-get-started',
 362         'only_matching': True,
 363     }, {
 364         'url': 'https://app.pluralsight.com/library/courses/understanding-microsoft-azure-amazon-aws/table-of-contents',
 365         'only_matching': True,
 366     }]
 367
 368     def _real_extract(self, url):
 369         course_id = self._match_id(url)
 370
 371         # TODO: PSM cookie
 372
 373         course = self._download_course(course_id, url, course_id)
 374
 375         title = course['title']
 376         course_name = course['name']
 377         course_data = course['modules']
 378         description = course.get('description') or course.get('shortDescription')
 379
 380         entries = []
 381         for num, module in enumerate(course_data, 1):
 382             author = module.get('author')
 383             module_name = module.get('name')
 384             if not author or not module_name:
 385                 continue
 386             for clip in module.get('clips', []):
 387                 clip_index = int_or_none(clip.get('index'))
 388                 if clip_index is None:
 389                     continue
 390                 clip_url = update_url_query(
 391                     '%s/player' % self._API_BASE, query={
 392                         'mode': 'live',
 393                         'course': course_name,
 394                         'author': author,
 395                         'name': module_name,
 396                         'clip': clip_index,
 397                     })
 398                 entries.append({
 399                     '_type': 'url_transparent',
 400                     'url': clip_url,
 401                     'ie_key': PluralsightIE.ie_key(),
 402                     'chapter': module.get('title'),
 403                     'chapter_number': num,
 404                     'chapter_id': module.get('moduleRef'),
 405                 })
 406
 407         return self.playlist_result(entries, course_id, title, description)