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|
- from __future__ import unicode_literals
-
- import re
-
- from .common import InfoExtractor
- from ..utils import (
- ExtractorError,
- orderedSet,
- unescapeHTML,
- )
-
-
- class StanfordOpenClassroomIE(InfoExtractor):
- IE_NAME = 'stanfordoc'
- IE_DESC = 'Stanford Open ClassRoom'
- _VALID_URL = r'https?://openclassroom\.stanford\.edu(?P<path>/?|(/MainFolder/(?:HomePage|CoursePage|VideoPage)\.php([?]course=(?P<course>[^&]+)(&video=(?P<video>[^&]+))?(&.*)?)?))$'
- _TEST = {
- 'url': 'http://openclassroom.stanford.edu/MainFolder/VideoPage.php?course=PracticalUnix&video=intro-environment&speed=100',
- 'md5': '544a9468546059d4e80d76265b0443b8',
- 'info_dict': {
- 'id': 'PracticalUnix_intro-environment',
- 'ext': 'mp4',
- 'title': 'Intro Environment',
- }
- }
-
- def _real_extract(self, url):
- mobj = re.match(self._VALID_URL, url)
-
- if mobj.group('course') and mobj.group('video'): # A specific video
- course = mobj.group('course')
- video = mobj.group('video')
- info = {
- 'id': course + '_' + video,
- 'uploader': None,
- 'upload_date': None,
- }
-
- baseUrl = 'http://openclassroom.stanford.edu/MainFolder/courses/' + course + '/videos/'
- xmlUrl = baseUrl + video + '.xml'
- mdoc = self._download_xml(xmlUrl, info['id'])
- try:
- info['title'] = mdoc.findall('./title')[0].text
- info['url'] = baseUrl + mdoc.findall('./videoFile')[0].text
- except IndexError:
- raise ExtractorError('Invalid metadata XML file')
- return info
- elif mobj.group('course'): # A course page
- course = mobj.group('course')
- info = {
- 'id': course,
- '_type': 'playlist',
- 'uploader': None,
- 'upload_date': None,
- }
-
- coursepage = self._download_webpage(
- url, info['id'],
- note='Downloading course info page',
- errnote='Unable to download course info page')
-
- info['title'] = self._html_search_regex(
- r'<h1>([^<]+)</h1>', coursepage, 'title', default=info['id'])
-
- info['description'] = self._html_search_regex(
- r'(?s)<description>([^<]+)</description>',
- coursepage, 'description', fatal=False)
-
- links = orderedSet(re.findall('<a href="(VideoPage.php\?[^"]+)">', coursepage))
- info['entries'] = [self.url_result(
- 'http://openclassroom.stanford.edu/MainFolder/%s' % unescapeHTML(l)
- ) for l in links]
- return info
- else: # Root page
- info = {
- 'id': 'Stanford OpenClassroom',
- '_type': 'playlist',
- 'uploader': None,
- 'upload_date': None,
- }
- info['title'] = info['id']
-
- rootURL = 'http://openclassroom.stanford.edu/MainFolder/HomePage.php'
- rootpage = self._download_webpage(rootURL, info['id'],
- errnote='Unable to download course info page')
-
- links = orderedSet(re.findall('<a href="(CoursePage.php\?[^"]+)">', rootpage))
- info['entries'] = [self.url_result(
- 'http://openclassroom.stanford.edu/MainFolder/%s' % unescapeHTML(l)
- ) for l in links]
- return info
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