292 lines
12 KiB
Python
292 lines
12 KiB
Python
from __future__ import unicode_literals
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import re
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import json
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import random
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import collections
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from .common import InfoExtractor
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from ..compat import (
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compat_str,
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compat_urlparse,
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)
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from ..utils import (
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ExtractorError,
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int_or_none,
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parse_duration,
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qualities,
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sanitized_Request,
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urlencode_postdata,
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)
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class PluralsightBaseIE(InfoExtractor):
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_API_BASE = 'http://app.pluralsight.com'
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class PluralsightIE(PluralsightBaseIE):
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IE_NAME = 'pluralsight'
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_VALID_URL = r'https?://(?:(?:www|app)\.)?pluralsight\.com/training/player\?'
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_LOGIN_URL = 'https://app.pluralsight.com/id/'
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_NETRC_MACHINE = 'pluralsight'
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_TESTS = [{
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'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',
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'md5': '4d458cf5cf4c593788672419a8dd4cf8',
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'info_dict': {
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'id': 'hosting-sql-server-windows-azure-iaas-m7-mgmt-04',
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'ext': 'mp4',
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'title': 'Management of SQL Server - Demo Monitoring',
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'duration': 338,
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},
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'skip': 'Requires pluralsight account credentials',
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}, {
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'url': 'https://app.pluralsight.com/training/player?course=angularjs-get-started&author=scott-allen&name=angularjs-get-started-m1-introduction&clip=0&mode=live',
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'only_matching': True,
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}, {
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# available without pluralsight account
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'url': 'http://app.pluralsight.com/training/player?author=scott-allen&name=angularjs-get-started-m1-introduction&mode=live&clip=0&course=angularjs-get-started',
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'only_matching': True,
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}]
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def _real_initialize(self):
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self._login()
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def _login(self):
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(username, password) = self._get_login_info()
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if username is None:
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return
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login_page = self._download_webpage(
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self._LOGIN_URL, None, 'Downloading login page')
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login_form = self._hidden_inputs(login_page)
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login_form.update({
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'Username': username.encode('utf-8'),
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'Password': password.encode('utf-8'),
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})
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post_url = self._search_regex(
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r'<form[^>]+action=(["\'])(?P<url>.+?)\1', login_page,
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'post url', default=self._LOGIN_URL, group='url')
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if not post_url.startswith('http'):
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post_url = compat_urlparse.urljoin(self._LOGIN_URL, post_url)
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request = sanitized_Request(
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post_url, urlencode_postdata(login_form))
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request.add_header('Content-Type', 'application/x-www-form-urlencoded')
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response = self._download_webpage(
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request, None, 'Logging in as %s' % username)
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error = self._search_regex(
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r'<span[^>]+class="field-validation-error"[^>]*>([^<]+)</span>',
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response, 'error message', default=None)
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if error:
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raise ExtractorError('Unable to login: %s' % error, expected=True)
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if all(p not in response for p in ('__INITIAL_STATE__', '"currentUser"')):
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raise ExtractorError('Unable to log in')
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def _real_extract(self, url):
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qs = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
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author = qs.get('author', [None])[0]
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name = qs.get('name', [None])[0]
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clip_id = qs.get('clip', [None])[0]
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course = qs.get('course', [None])[0]
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if any(not f for f in (author, name, clip_id, course,)):
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raise ExtractorError('Invalid URL', expected=True)
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display_id = '%s-%s' % (name, clip_id)
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webpage = self._download_webpage(url, display_id)
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modules = self._search_regex(
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r'moduleCollection\s*:\s*new\s+ModuleCollection\((\[.+?\])\s*,\s*\$rootScope\)',
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webpage, 'modules', default=None)
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if modules:
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collection = self._parse_json(modules, display_id)
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else:
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# Webpage may be served in different layout (see
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# https://github.com/rg3/youtube-dl/issues/7607)
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collection = self._parse_json(
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self._search_regex(
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r'var\s+initialState\s*=\s*({.+?});\n', webpage, 'initial state'),
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display_id)['course']['modules']
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module, clip = None, None
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for module_ in collection:
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if name in (module_.get('moduleName'), module_.get('name')):
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module = module_
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for clip_ in module_.get('clips', []):
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clip_index = clip_.get('clipIndex')
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if clip_index is None:
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clip_index = clip_.get('index')
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if clip_index is None:
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continue
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if compat_str(clip_index) == clip_id:
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clip = clip_
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break
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if not clip:
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raise ExtractorError('Unable to resolve clip')
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QUALITIES = {
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'low': {'width': 640, 'height': 480},
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'medium': {'width': 848, 'height': 640},
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'high': {'width': 1024, 'height': 768},
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'high-widescreen': {'width': 1280, 'height': 720},
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}
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QUALITIES_PREFERENCE = ('low', 'medium', 'high', 'high-widescreen',)
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quality_key = qualities(QUALITIES_PREFERENCE)
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AllowedQuality = collections.namedtuple('AllowedQuality', ['ext', 'qualities'])
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ALLOWED_QUALITIES = (
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AllowedQuality('webm', ['high', ]),
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AllowedQuality('mp4', ['low', 'medium', 'high', ]),
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)
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# Some courses also offer widescreen resolution for high quality (see
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# https://github.com/rg3/youtube-dl/issues/7766)
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widescreen = True if re.search(
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r'courseSupportsWidescreenVideoFormats\s*:\s*true', webpage) else False
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best_quality = 'high-widescreen' if widescreen else 'high'
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if widescreen:
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for allowed_quality in ALLOWED_QUALITIES:
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allowed_quality.qualities.append(best_quality)
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# In order to minimize the number of calls to ViewClip API and reduce
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# the probability of being throttled or banned by Pluralsight we will request
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# only single format until formats listing was explicitly requested.
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if self._downloader.params.get('listformats', False):
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allowed_qualities = ALLOWED_QUALITIES
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else:
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def guess_allowed_qualities():
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req_format = self._downloader.params.get('format') or 'best'
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req_format_split = req_format.split('-', 1)
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if len(req_format_split) > 1:
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req_ext, req_quality = req_format_split
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for allowed_quality in ALLOWED_QUALITIES:
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if req_ext == allowed_quality.ext and req_quality in allowed_quality.qualities:
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return (AllowedQuality(req_ext, (req_quality, )), )
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req_ext = 'webm' if self._downloader.params.get('prefer_free_formats') else 'mp4'
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return (AllowedQuality(req_ext, (best_quality, )), )
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allowed_qualities = guess_allowed_qualities()
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formats = []
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for ext, qualities_ in allowed_qualities:
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for quality in qualities_:
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f = QUALITIES[quality].copy()
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clip_post = {
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'a': author,
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'cap': 'false',
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'cn': clip_id,
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'course': course,
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'lc': 'en',
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'm': name,
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'mt': ext,
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'q': '%dx%d' % (f['width'], f['height']),
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}
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request = sanitized_Request(
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'%s/training/Player/ViewClip' % self._API_BASE,
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json.dumps(clip_post).encode('utf-8'))
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request.add_header('Content-Type', 'application/json;charset=utf-8')
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format_id = '%s-%s' % (ext, quality)
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clip_url = self._download_webpage(
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request, display_id, 'Downloading %s URL' % format_id, fatal=False)
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# Pluralsight tracks multiple sequential calls to ViewClip API and start
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# to return 429 HTTP errors after some time (see
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# https://github.com/rg3/youtube-dl/pull/6989). Moreover it may even lead
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# to account ban (see https://github.com/rg3/youtube-dl/issues/6842).
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# To somewhat reduce the probability of these consequences
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# we will sleep random amount of time before each call to ViewClip.
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self._sleep(
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random.randint(2, 5), display_id,
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'%(video_id)s: Waiting for %(timeout)s seconds to avoid throttling')
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if not clip_url:
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continue
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f.update({
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'url': clip_url,
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'ext': ext,
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'format_id': format_id,
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'quality': quality_key(quality),
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})
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formats.append(f)
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self._sort_formats(formats)
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# TODO: captions
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# http://www.pluralsight.com/training/Player/ViewClip + cap = true
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# or
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# http://www.pluralsight.com/training/Player/Captions
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# { a = author, cn = clip_id, lc = end, m = name }
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return {
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'id': clip.get('clipName') or clip['name'],
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'title': '%s - %s' % (module['title'], clip['title']),
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'duration': int_or_none(clip.get('duration')) or parse_duration(clip.get('formattedDuration')),
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'creator': author,
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'formats': formats
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}
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class PluralsightCourseIE(PluralsightBaseIE):
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IE_NAME = 'pluralsight:course'
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_VALID_URL = r'https?://(?:(?:www|app)\.)?pluralsight\.com/(?:library/)?courses/(?P<id>[^/]+)'
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_TESTS = [{
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# Free course from Pluralsight Starter Subscription for Microsoft TechNet
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# https://offers.pluralsight.com/technet?loc=zTS3z&prod=zOTprodz&tech=zOttechz&prog=zOTprogz&type=zSOz&media=zOTmediaz&country=zUSz
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'url': 'http://www.pluralsight.com/courses/hosting-sql-server-windows-azure-iaas',
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'info_dict': {
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'id': 'hosting-sql-server-windows-azure-iaas',
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'title': 'Hosting SQL Server in Microsoft Azure IaaS Fundamentals',
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'description': 'md5:61b37e60f21c4b2f91dc621a977d0986',
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},
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'playlist_count': 31,
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}, {
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# available without pluralsight account
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'url': 'https://www.pluralsight.com/courses/angularjs-get-started',
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'only_matching': True,
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}, {
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'url': 'https://app.pluralsight.com/library/courses/understanding-microsoft-azure-amazon-aws/table-of-contents',
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'only_matching': True,
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}]
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def _real_extract(self, url):
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course_id = self._match_id(url)
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# TODO: PSM cookie
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course = self._download_json(
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'%s/data/course/%s' % (self._API_BASE, course_id),
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course_id, 'Downloading course JSON')
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title = course['title']
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description = course.get('description') or course.get('shortDescription')
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course_data = self._download_json(
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'%s/data/course/content/%s' % (self._API_BASE, course_id),
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course_id, 'Downloading course data JSON')
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entries = []
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for module in course_data:
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for clip in module.get('clips', []):
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player_parameters = clip.get('playerParameters')
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if not player_parameters:
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continue
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entries.append(self.url_result(
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'%s/training/player?%s' % (self._API_BASE, player_parameters),
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'Pluralsight'))
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return self.playlist_result(entries, course_id, title, description)
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