Using youtube api (v3) instead of v2 to get the video duration .

TNL-2413

common/djangoapps/terrain/setup_prereqs.py

@@ -28,8 +28,7 @@ SERVICES = {
 
 YOUTUBE_API_URLS = {
     'main': 'https://www.youtube.com/',
-    'player': 'http://www.youtube.com/iframe_api',
-    'metadata': 'http://gdata.youtube.com/feeds/api/videos/',
+    'player': 'https://www.youtube.com/iframe_api',
     # For transcripts, you need to check an actual video, so we will
     # just specify our default video and see if that one is available.
     'transcript': 'http://video.google.com/timedtext?lang=en&v=OEoXaMPEzfM',

common/djangoapps/terrain/stubs/youtube.py

@@ -95,6 +95,9 @@ class StubYouTubeHandler(StubHttpRequestHandler):
             if self.server.config.get('youtube_api_blocked'):
                 self.send_response(404, content='', headers={'Content-type': 'text/plain'})
             else:
+                # Delay the response to simulate network latency
+                time.sleep(self.server.config.get('time_to_response', self.DEFAULT_DELAY_SEC))
+
                 # Get the response to send from YouTube.
                 # We need to do this every time because Google sometimes sends different responses
                 # as part of their own experiments, which has caused our tests to become "flaky"
@@ -117,17 +120,16 @@ class StubYouTubeHandler(StubHttpRequestHandler):
 
         # Construct the response content
         callback = self.get_params['callback']
-        youtube_metadata = json.loads(
-            requests.get(
-                "http://gdata.youtube.com/feeds/api/videos/{id}?v=2&alt=jsonc".format(id=youtube_id)
-            ).text
-        )
+
         data = OrderedDict({
-            'data': OrderedDict({
-                'id': youtube_id,
-                'message': message,
-                'duration': youtube_metadata['data']['duration'],
-            })
+            'items': list(
+                OrderedDict({
+                    'contentDetails': OrderedDict({
+                        'id': youtube_id,
+                        'duration': 'PT2M20S',
+                    })
+                })
+            )
         })
         response = "{cb}({data})".format(cb=callback, data=json.dumps(data))