106 lines
4.0 KiB
Python
106 lines
4.0 KiB
Python
import re
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from .common import InfoExtractor
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from ..utils import (
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ExtractorError,
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orderedSet,
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unescapeHTML,
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)
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class StanfordOpenClassroomIE(InfoExtractor):
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IE_NAME = u'stanfordoc'
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IE_DESC = u'Stanford Open ClassRoom'
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_VALID_URL = r'^(?:https?://)?openclassroom\.stanford\.edu(?P<path>/?|(/MainFolder/(?:HomePage|CoursePage|VideoPage)\.php([?]course=(?P<course>[^&]+)(&video=(?P<video>[^&]+))?(&.*)?)?))$'
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_TEST = {
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u'url': u'http://openclassroom.stanford.edu/MainFolder/VideoPage.php?course=PracticalUnix&video=intro-environment&speed=100',
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u'file': u'PracticalUnix_intro-environment.mp4',
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u'md5': u'544a9468546059d4e80d76265b0443b8',
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u'info_dict': {
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u"title": u"Intro Environment"
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}
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}
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def _real_extract(self, url):
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mobj = re.match(self._VALID_URL, url)
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if mobj is None:
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raise ExtractorError(u'Invalid URL: %s' % url)
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if mobj.group('course') and mobj.group('video'): # A specific video
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course = mobj.group('course')
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video = mobj.group('video')
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info = {
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'id': course + '_' + video,
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'uploader': None,
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'upload_date': None,
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}
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self.report_extraction(info['id'])
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baseUrl = 'http://openclassroom.stanford.edu/MainFolder/courses/' + course + '/videos/'
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xmlUrl = baseUrl + video + '.xml'
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mdoc = self._download_xml(xmlUrl, info['id'])
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try:
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info['title'] = mdoc.findall('./title')[0].text
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info['url'] = baseUrl + mdoc.findall('./videoFile')[0].text
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except IndexError:
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raise ExtractorError(u'Invalid metadata XML file')
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info['ext'] = info['url'].rpartition('.')[2]
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return [info]
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elif mobj.group('course'): # A course page
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course = mobj.group('course')
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info = {
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'id': course,
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'type': 'playlist',
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'uploader': None,
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'upload_date': None,
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}
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coursepage = self._download_webpage(url, info['id'],
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note='Downloading course info page',
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errnote='Unable to download course info page')
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info['title'] = self._html_search_regex('<h1>([^<]+)</h1>', coursepage, 'title', default=info['id'])
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info['description'] = self._html_search_regex('<description>([^<]+)</description>',
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coursepage, u'description', fatal=False)
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links = orderedSet(re.findall('<a href="(VideoPage.php\?[^"]+)">', coursepage))
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info['list'] = [
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{
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'type': 'reference',
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'url': 'http://openclassroom.stanford.edu/MainFolder/' + unescapeHTML(vpage),
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}
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for vpage in links]
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results = []
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for entry in info['list']:
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assert entry['type'] == 'reference'
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results += self.extract(entry['url'])
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return results
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else: # Root page
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info = {
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'id': 'Stanford OpenClassroom',
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'type': 'playlist',
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'uploader': None,
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'upload_date': None,
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}
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rootURL = 'http://openclassroom.stanford.edu/MainFolder/HomePage.php'
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rootpage = self._download_webpage(rootURL, info['id'],
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errnote=u'Unable to download course info page')
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info['title'] = info['id']
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links = orderedSet(re.findall('<a href="(CoursePage.php\?[^"]+)">', rootpage))
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info['list'] = [
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{
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'type': 'reference',
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'url': 'http://openclassroom.stanford.edu/MainFolder/' + unescapeHTML(cpage),
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}
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for cpage in links]
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results = []
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for entry in info['list']:
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assert entry['type'] == 'reference'
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results += self.extract(entry['url'])
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return results
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