X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=youtube_dl%2Fextractor%2Fpluralsight.py;h=55c11b3bf89be7196c3c95d0a3fb25dae27ce51b;hb=edc70f4aaf08009c95cb5e91878461cc7b508f68;hp=de7dc739b25c9f5418ec9e1336b161115c8277c2;hpb=563772eda4a42b1fce1f3740fe91bf74e63bd347;p=youtube-dl diff --git a/youtube_dl/extractor/pluralsight.py b/youtube_dl/extractor/pluralsight.py index de7dc739b..55c11b3bf 100644 --- a/youtube_dl/extractor/pluralsight.py +++ b/youtube_dl/extractor/pluralsight.py @@ -1,18 +1,22 @@ from __future__ import unicode_literals +import re import json +import random +import collections from .common import InfoExtractor from ..compat import ( compat_str, compat_urllib_parse, - compat_urllib_request, compat_urlparse, ) from ..utils import ( ExtractorError, int_or_none, parse_duration, + qualities, + sanitized_Request, ) @@ -71,7 +75,7 @@ class PluralsightIE(PluralsightBaseIE): if not post_url.startswith('http'): post_url = compat_urlparse.urljoin(self._LOGIN_URL, post_url) - request = compat_urllib_request.Request( + request = sanitized_Request( post_url, compat_urllib_parse.urlencode(login_form).encode('utf-8')) request.add_header('Content-Type', 'application/x-www-form-urlencoded') @@ -84,6 +88,9 @@ class PluralsightIE(PluralsightBaseIE): if error: raise ExtractorError('Unable to login: %s' % error, expected=True) + if all(p not in response for p in ('__INITIAL_STATE__', '"currentUser"')): + raise ExtractorError('Unable to log in') + def _real_extract(self, url): qs = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query) @@ -99,19 +106,29 @@ class PluralsightIE(PluralsightBaseIE): webpage = self._download_webpage(url, display_id) - collection = self._parse_json( - self._search_regex( - r'moduleCollection\s*:\s*new\s+ModuleCollection\((\[.+?\])\s*,\s*\$rootScope\)', - webpage, 'modules'), - display_id) + modules = self._search_regex( + r'moduleCollection\s*:\s*new\s+ModuleCollection\((\[.+?\])\s*,\s*\$rootScope\)', + webpage, 'modules', default=None) + + if modules: + collection = self._parse_json(modules, display_id) + else: + # Webpage may be served in different layout (see + # https://github.com/rg3/youtube-dl/issues/7607) + collection = self._parse_json( + self._search_regex( + r'var\s+initialState\s*=\s*({.+?});\n', webpage, 'initial state'), + display_id)['course']['modules'] module, clip = None, None for module_ in collection: - if module_.get('moduleName') == name: + if name in (module_.get('moduleName'), module_.get('name')): module = module_ for clip_ in module_.get('clips', []): clip_index = clip_.get('clipIndex') + if clip_index is None: + clip_index = clip_.get('index') if clip_index is None: continue if compat_str(clip_index) == clip_id: @@ -125,16 +142,49 @@ class PluralsightIE(PluralsightBaseIE): 'low': {'width': 640, 'height': 480}, 'medium': {'width': 848, 'height': 640}, 'high': {'width': 1024, 'height': 768}, + 'high-widescreen': {'width': 1280, 'height': 720}, } + QUALITIES_PREFERENCE = ('low', 'medium', 'high', 'high-widescreen',) + quality_key = qualities(QUALITIES_PREFERENCE) + + AllowedQuality = collections.namedtuple('AllowedQuality', ['ext', 'qualities']) + ALLOWED_QUALITIES = ( - ('webm', ('high',)), - ('mp4', ('low', 'medium', 'high',)), + AllowedQuality('webm', ['high', ]), + AllowedQuality('mp4', ['low', 'medium', 'high', ]), ) + # Some courses also offer widescreen resolution for high quality (see + # https://github.com/rg3/youtube-dl/issues/7766) + widescreen = True if re.search( + r'courseSupportsWidescreenVideoFormats\s*:\s*true', webpage) else False + best_quality = 'high-widescreen' if widescreen else 'high' + if widescreen: + for allowed_quality in ALLOWED_QUALITIES: + allowed_quality.qualities.append(best_quality) + + # In order to minimize the number of calls to ViewClip API and reduce + # the probability of being throttled or banned by Pluralsight we will request + # only single format until formats listing was explicitly requested. + if self._downloader.params.get('listformats', False): + allowed_qualities = ALLOWED_QUALITIES + else: + def guess_allowed_qualities(): + req_format = self._downloader.params.get('format') or 'best' + req_format_split = req_format.split('-', 1) + if len(req_format_split) > 1: + req_ext, req_quality = req_format_split + for allowed_quality in ALLOWED_QUALITIES: + if req_ext == allowed_quality.ext and req_quality in allowed_quality.qualities: + return (AllowedQuality(req_ext, (req_quality, )), ) + req_ext = 'webm' if self._downloader.params.get('prefer_free_formats') else 'mp4' + return (AllowedQuality(req_ext, (best_quality, )), ) + allowed_qualities = guess_allowed_qualities() + formats = [] - for ext, qualities in ALLOWED_QUALITIES: - for quality in qualities: + for ext, qualities_ in allowed_qualities: + for quality in qualities_: f = QUALITIES[quality].copy() clip_post = { 'a': author, @@ -146,19 +196,31 @@ class PluralsightIE(PluralsightBaseIE): 'mt': ext, 'q': '%dx%d' % (f['width'], f['height']), } - request = compat_urllib_request.Request( + request = sanitized_Request( '%s/training/Player/ViewClip' % self._API_BASE, json.dumps(clip_post).encode('utf-8')) request.add_header('Content-Type', 'application/json;charset=utf-8') format_id = '%s-%s' % (ext, quality) clip_url = self._download_webpage( request, display_id, 'Downloading %s URL' % format_id, fatal=False) + + # Pluralsight tracks multiple sequential calls to ViewClip API and start + # to return 429 HTTP errors after some time (see + # https://github.com/rg3/youtube-dl/pull/6989). Moreover it may even lead + # to account ban (see https://github.com/rg3/youtube-dl/issues/6842). + # To somewhat reduce the probability of these consequences + # we will sleep random amount of time before each call to ViewClip. + self._sleep( + random.randint(2, 5), display_id, + '%(video_id)s: Waiting for %(timeout)s seconds to avoid throttling') + if not clip_url: continue f.update({ 'url': clip_url, 'ext': ext, 'format_id': format_id, + 'quality': quality_key(quality), }) formats.append(f) self._sort_formats(formats)