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-rw-r--r--youtube_dl/extractor/stanfordoc.py112
1 files changed, 112 insertions, 0 deletions
diff --git a/youtube_dl/extractor/stanfordoc.py b/youtube_dl/extractor/stanfordoc.py
new file mode 100644
index 000000000..8d3e32ab9
--- /dev/null
+++ b/youtube_dl/extractor/stanfordoc.py
@@ -0,0 +1,112 @@
+import re
+import socket
+import xml.etree.ElementTree
+
+from .common import InfoExtractor
+from ..utils import (
+ compat_http_client,
+ compat_str,
+ compat_urllib_error,
+ compat_urllib_request,
+
+ ExtractorError,
+ orderedSet,
+ unescapeHTML,
+)
+
+
+class StanfordOpenClassroomIE(InfoExtractor):
+ """Information extractor for Stanford's Open ClassRoom"""
+
+ _VALID_URL = r'^(?:https?://)?openclassroom.stanford.edu(?P<path>/?|(/MainFolder/(?:HomePage|CoursePage|VideoPage)\.php([?]course=(?P<course>[^&]+)(&video=(?P<video>[^&]+))?(&.*)?)?))$'
+ IE_NAME = u'stanfordoc'
+
+ def _real_extract(self, url):
+ mobj = re.match(self._VALID_URL, url)
+ if mobj is None:
+ raise ExtractorError(u'Invalid URL: %s' % 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,
+ }
+
+ self.report_extraction(info['id'])
+ baseUrl = 'http://openclassroom.stanford.edu/MainFolder/courses/' + course + '/videos/'
+ xmlUrl = baseUrl + video + '.xml'
+ try:
+ metaXml = compat_urllib_request.urlopen(xmlUrl).read()
+ except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
+ raise ExtractorError(u'Unable to download video info XML: %s' % compat_str(err))
+ mdoc = xml.etree.ElementTree.fromstring(metaXml)
+ try:
+ info['title'] = mdoc.findall('./title')[0].text
+ info['url'] = baseUrl + mdoc.findall('./videoFile')[0].text
+ except IndexError:
+ raise ExtractorError(u'Invalid metadata XML file')
+ info['ext'] = info['url'].rpartition('.')[2]
+ 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('<h1>([^<]+)</h1>', coursepage, 'title', default=info['id'])
+
+ info['description'] = self._html_search_regex('<description>([^<]+)</description>',
+ coursepage, u'description', fatal=False)
+
+ links = orderedSet(re.findall('<a href="(VideoPage.php\?[^"]+)">', coursepage))
+ info['list'] = [
+ {
+ 'type': 'reference',
+ 'url': 'http://openclassroom.stanford.edu/MainFolder/' + unescapeHTML(vpage),
+ }
+ for vpage in links]
+ results = []
+ for entry in info['list']:
+ assert entry['type'] == 'reference'
+ results += self.extract(entry['url'])
+ return results
+ else: # Root page
+ info = {
+ 'id': 'Stanford OpenClassroom',
+ 'type': 'playlist',
+ 'uploader': None,
+ 'upload_date': None,
+ }
+
+ self.report_download_webpage(info['id'])
+ rootURL = 'http://openclassroom.stanford.edu/MainFolder/HomePage.php'
+ try:
+ rootpage = compat_urllib_request.urlopen(rootURL).read()
+ except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
+ raise ExtractorError(u'Unable to download course info page: ' + compat_str(err))
+
+ info['title'] = info['id']
+
+ links = orderedSet(re.findall('<a href="(CoursePage.php\?[^"]+)">', rootpage))
+ info['list'] = [
+ {
+ 'type': 'reference',
+ 'url': 'http://openclassroom.stanford.edu/MainFolder/' + unescapeHTML(cpage),
+ }
+ for cpage in links]
+
+ results = []
+ for entry in info['list']:
+ assert entry['type'] == 'reference'
+ results += self.extract(entry['url'])
+ return results