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Improve course/category extraction
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dirkf
GitHub
parent
0a99e9f59d
commit
eff6cd4c24
1 changed files with 102 additions and 28 deletions
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@ -1,6 +1,8 @@
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# coding: utf-8
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from __future__ import unicode_literals
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import re
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from .common import InfoExtractor
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from ..compat import (
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compat_kwargs,
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@ -27,6 +29,42 @@ class PlatziBaseIE(InfoExtractor):
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_LOGIN_URL = 'https://platzi.com/login/'
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_NETRC_MACHINE = 'platzi'
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def _raise_extractor_error(self, video_id, reason, expected=True):
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raise ExtractorError('[%s] %s: %s' % (self.IE_NAME, video_id, reason), expected=expected)
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def _download_webpage(self, url_or_request, video_id, *args, **kwargs):
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# CF likes Connection: keep-alive and so disfavours Py2
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# retry on 403 may get in
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kwargs['expected_status'] = 403
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# header parameters required fpor Py3 to breach site's CF fence w/o 403
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headers = kwargs.get('headers') or {}
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new_hdrs = {}
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if 'User-Agent' not in headers:
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headers['User-Agent'] = 'Mozilla/5.0' # (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.0.0 Safari/537.36'
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kwargs['headers'] = new_hdrs = headers
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if new_hdrs:
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kwargs = compat_kwargs(kwargs)
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for _ in range(2):
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x = super(PlatziBaseIE, self)._download_webpage_handle(url_or_request, video_id, *args, **kwargs)
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if x is False:
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return x
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if x[1].getcode() != 403:
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break
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kwargs.pop('expected_status', None)
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note = kwargs.pop('note', '')
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kwargs['note'] = (note or 'Downloading webpage') + ' - retrying'
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kwargs = compat_kwargs(kwargs)
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path = compat_urllib_parse_urlparse(x[1].geturl())
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if path == '/':
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self._raise_extractor_error(video_id, 'Redirected to home page: content expired?')
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elif path =='/login':
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self.raise_login_required()
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else:
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errs = clean_html(get_element_by_class('Errorpage-text', x[0]))
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if errs:
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self._raise_extractor_error(video_id, errs)
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return x[0]
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def _real_initialize(self):
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self._login()
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@ -122,29 +160,10 @@ class PlatziIE(PlatziBaseIE):
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'skip': 'Content expired',
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}]
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def _download_webpage_handle(self, url_or_request, video_id, *args, **kwargs):
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# CF likes Connection: keep-alive and so disfavours Py2
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# retry on 403 may get in
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kwargs['expected_status'] = 403
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x = super(PlatziIE, self)._download_webpage_handle(url_or_request, video_id, *args, **kwargs)
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if x is not False and x[1].getcode() == 403:
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kwargs.pop('expected_status', None)
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note = kwargs.pop('note', '')
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kwargs['note'] = (note or 'Downloading webpage') + ' - retrying'
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x = super(PlatziIE, self)._download_webpage_handle(url_or_request, video_id, *args, **compat_kwargs(kwargs))
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return x
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def _real_extract(self, url):
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lecture_id = self._match_id(url)
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# header parameters required fpor Py3 to breach site's CF fence w/o 403
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headers = {
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'User-Agent': 'Mozilla/5.0',
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}
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webpage, urlh = self._download_webpage_handle(url, lecture_id, headers=headers)
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if compat_urllib_parse_urlparse(urlh.geturl()).path == '/':
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raise ExtractorError(
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'Redirected to home page: content expired?', expected=True)
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webpage = self._download_webpage(url, lecture_id)
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data_preloaded_state = self._parse_json(
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self._search_regex(
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@ -158,11 +177,10 @@ class PlatziIE(PlatziBaseIE):
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why = video_player['blockedInfo'].get('type') or 'unspecified'
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if why == 'unlogged':
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self.raise_login_required()
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raise ExtractorError(
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'All video formats blocked because ' + why, expected=True)
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self._raise_extractor_error(video_id, 'All video formats blocked because ' + why)
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formats = []
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headers['Referer'] = url
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headers = {'Referer': url}
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extractions = {
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'hls': lambda x: formats.extend(self._extract_m3u8_formats(
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server_json[x], lecture_id, 'mp4',
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@ -209,17 +227,35 @@ class PlatziCourseIE(PlatziBaseIE):
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_VALID_URL = r'''(?x)
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https?://
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(?:
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platzi\.com/clases| # es version
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courses\.platzi\.com/classes # en version
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(?P<clas>
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platzi\.com/clases| # es version
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courses\.platzi\.com/classes # en version
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platzi\.com(?:/(?P<curs>cursos))?
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)/(?P<id>[^/?\#&]+)
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'''
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_TESTS = [{
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'url': 'https://platzi.com/web-angular/',
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'info_dict': {
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'id': 'web-angular',
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'title': 'Frontend con Angular',
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},
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'playlist_count': 9,
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}, {
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'url': 'https://platzi.com/cursos/angular/',
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'info_dict': {
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'id': '2478',
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'title': 'Curso de Fundamentos de Angular',
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},
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'playlist_count': 21,
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}, {
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'url': 'https://platzi.com/clases/next-js/',
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'info_dict': {
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'id': '1311',
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'title': 'Curso de Next.js',
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},
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'playlist_count': 22,
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'skip': 'Oops (updating page)',
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}, {
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'url': 'https://courses.platzi.com/classes/communication-codestream/',
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'info_dict': {
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@ -227,16 +263,54 @@ class PlatziCourseIE(PlatziBaseIE):
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'title': 'Codestream Course',
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},
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'playlist_count': 14,
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'skip': 'Content expired',
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}]
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@classmethod
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def _match_valid_url(cls, url):
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return re.match(cls._VALID_URL, url)
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@classmethod
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def suitable(cls, url):
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return False if PlatziIE.suitable(url) else super(PlatziCourseIE, cls).suitable(url)
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def _real_extract(self, url):
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course_name = self._match_id(url)
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def __extract_things(self, webpage, thing_id, thing_pattern):
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return self.playlist_from_matches(
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re.finditer(thing_pattern, webpage),
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playlist_id=thing_id,
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playlist_title=self._og_search_title(webpage, default=None),
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getter=lambda m: urljoin('https://platzi.com', m.group('path')))
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webpage = self._download_webpage(url, course_name)
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def _extract_classes(self, webpage, course_id):
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display_id = course_id
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course_id = self._search_regex(
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r'''(["'])courseId\1\s*:\s*(?P<id>\d+)''',
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webpage, 'course id', group='id', fatal=False) or course_id
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return self.__extract_things(
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webpage, course_id,
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r'''<a\b[^>]+\bhref\s*=\s*['"]?(?P<path>/clases/\d+-%s/[^/]+)'''
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% (display_id, ))
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def _extract_categories(self, webpage, cat_id):
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return self.__extract_things(
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webpage, cat_id,
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r'''<a\b[^>]+\bhref\s*=\s*['"]?(?P<path>/cursos/[^/]+)''')
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def _real_extract(self, url):
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m = self._match_valid_url(url)
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classes, courses, this_id = m.group('clas', 'curs', 'id')
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webpage = self._download_webpage(url, this_id)
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if courses:
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return self._extract_classes(webpage, this_id)
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if not classes:
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return self._extract_categories(webpage, this_id)
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# this branch now seems always to give "Oops" pages
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course_name = this_id
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initialData = self._search_regex(
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(r'window.initialData\s*=\s*({.+?})\s*;\s*\n', r'window.initialData\s*=\s*({.+?})\s*;'),
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