[openclassroom] Add new extractor(closes #9147)

youtube_dl/extractor/extractors.py

@@ -544,6 +544,7 @@ from .ooyala import (
     OoyalaIE,
     OoyalaExternalIE,
 )
+from .openclassroom import OpenClassRoomIE
 from .openload import OpenloadIE
 from .ora import OraTVIE
 from .orf import (

youtube_dl/extractor/openclassroom.py

@@ -0,0 +1,42 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+import re
+
+from .common import InfoExtractor
+from ..compat import compat_parse_qs
+from ..utils import (
+    ExtractorError,
+    xpath_text,
+    clean_html,
+)
+
+
+class OpenClassRoomIE(InfoExtractor):
+    _VALID_URL = r'https?://openclassroom\.stanford\.edu/MainFolder/VideoPage\.php\?(?P<query>.*)'
+    _TEST = {
+        'url': 'http://openclassroom.stanford.edu/MainFolder/VideoPage.php?course=PracticalUnix&video=intro-environment&speed=100',
+        'md5': '544a9468546059d4e80d76265b0443b8',
+        'info_dict': {
+            'id': 'intro-environment',
+            'ext': 'mp4',
+            'title': 'Intro Environment',
+            'description': 'md5:7d57306c8649f814ca00bb80dada600e',
+        }
+    }
+    _URL_TEMPLATE = 'http://openclassroom.stanford.edu/MainFolder/courses/%s/videos/%s'
+
+    def _real_extract(self, url):
+        qs = compat_parse_qs(re.match(self._VALID_URL, url).group('query'))
+        if not qs.get('course') or not qs.get('video'):
+            raise ExtractorError('Unsupported URL', expected=True)
+        video_id = qs['video'][0]
+        video_doc = self._download_xml(
+            self._URL_TEMPLATE % (qs['course'][0], video_id + '.xml'), video_id)
+        return {
+            'id': video_id,
+            'title': xpath_text(video_doc, 'title', 'title', True),
+            'url': self._URL_TEMPLATE % (qs['course'][0], xpath_text(
+                video_doc, 'videoFile', 'video url', True)),
+            'description': clean_html(xpath_text(video_doc, 'text')),
+        }