OpenClassRoom videos (#234)

diff --git a/youtube_dl/__init__.py b/youtube_dl/__init__.py
index 042b852..96e2f0f 100755 (executable)
--- a/youtube_dl/__init__.py
+++ b/youtube_dl/__init__.py
@@ -711,6 +711,25 @@ class FileDownloader(object):
                        return u'"' + title + '" title matched reject pattern "' + rejecttitle + '"'
                return None
 
+       def process_dict(self, info_dict):
+               """ Download and handle the extracted information.
+               For details on the specification of the various types of content, refer to the _process_* functions. """
+               if info_dict['type'] == 'playlist':
+                       self._process_playlist(info_dict)
+               elif info_dict['type'] == 'legacy-video':
+                       self.process_info(info_dict)
+               else:
+                       raise ValueError('Invalid item type')
+
+       def _process_playlist(self, info_dict):
+               assert info_dict['type'] == 'playlist'
+               assert 'title' in info_dict
+               assert 'stitle' in info_dict
+               entries = info_dict['list']
+
+               for e in entries:
+                       self.process_dict(e)
+
        def process_info(self, info_dict):
                """Process a single dictionary returned by an InfoExtractor."""
 
@@ -3744,6 +3763,59 @@ class MixcloudIE(InfoExtractor):
                except UnavailableVideoError, err:
                        self._downloader.trouble(u'ERROR: unable to download file')
 
+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 report_extraction(self, video_id):
+               """Report information extraction."""
+               self._downloader.to_screen(u'[%s] %s: Extracting information' % (self.IE_NAME, video_id))
+
+       def _real_extract(self, url):
+               mobj = re.match(self._VALID_URL, url)
+               if mobj is None:
+                       self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
+                       return
+
+               if mobj.group('course') and mobj.group('video'): # A specific video
+                       course = mobj.group('course')
+                       video = mobj.group('video')
+                       info = {
+                               'id': _simplify_title(course + '_' + video),
+                       }
+       
+                       self.report_extraction(info['id'])
+                       baseUrl = 'http://openclassroom.stanford.edu/MainFolder/courses/' + course + '/videos/'
+                       xmlUrl = baseUrl + video + '.xml'
+                       try:
+                               metaXml = urllib2.urlopen(xmlUrl).read()
+                       except (urllib2.URLError, httplib.HTTPException, socket.error), err:
+                               self._downloader.trouble(u'ERROR: unable to download video info XML: %s' % str(err))
+                               return
+                       mdoc = xml.etree.ElementTree.fromstring(metaXml)
+                       try:
+                               info['title'] = mdoc.findall('./title')[0].text
+                               info['url'] = baseUrl + mdoc.findall('./videoFile')[0].text
+                       except IndexError:
+                               self._downloader.trouble(u'\nERROR: Invalid metadata XML file')
+                               return
+                       info['stitle'] = _simplify_title(info['title'])
+                       info['ext'] = info['url'].rpartition('.')[2]
+                       info['format'] = info['ext']
+                       self._downloader.increment_downloads()
+                       try:
+                               self._downloader.process_info(info)
+                       except UnavailableVideoError, err:
+                               self._downloader.trouble(u'\nERROR: unable to download video')
+               else:
+                       print('TODO: Not yet implemented')
+                       1/0
+
+
+
+
 
 
 class PostProcessor(object):
@@ -4166,6 +4238,7 @@ def gen_extractors():
                SoundcloudIE(),
                InfoQIE(),
                MixcloudIE(),
+               StanfordOpenClassroomIE(),
 
                GenericIE()
        ]