Refactor SS polling code.

edx_proctoring/callbacks.py

@@ -68,7 +68,8 @@ def start_exam_callback(request, attempt_code):  # pylint: disable=unused-argume
             Context({
                 'exam_attempt_status_url': poll_url,
                 'platform_name': settings.PLATFORM_NAME,
-                'link_urls': settings.PROCTORING_SETTINGS.get('LINK_URLS', {})
+                'link_urls': settings.PROCTORING_SETTINGS.get('LINK_URLS', {}),
+                'default_polling_interval': constants.DEFAULT_CLIENT_POLLING_INTERVAL,
             })
         )
     )

edx_proctoring/templates/proctored_exam/proctoring_launch_callback.html

@@ -187,12 +187,25 @@
     </div>
 
     <script type="text/javascript">
-      var _poll_interval = null;
+      var _poll_interval_id = null;
+      var _current_interval;
 
       $(document).ready(function() {
-        poll_exam_status();
+          set_poll_interval({{default_polling_interval}});
+          poll_exam_status();
       });
 
+      function set_poll_interval(new_polling_interval) {
+
+          // The polling interval will be in seconds, so we need to multiply by 1000 to get the interval in miliseconds.
+          new_pollint_interval = new_polling_interval * 1000;
+          if (new_polling_interval != _current_interval) {
+              clearInterval(_poll_interval_id);
+              _poll_interval_id = setInterval(poll_exam_status, new_polling_interval);
+          }
+
+      }
+
       function poll_exam_status() {
         var url = '{{exam_attempt_status_url}}';
 
@@ -203,9 +216,9 @@
             // NOTE: This is per the API documentation from SoftwareSecure
             window.external.quitApplication();
           }
-          clearInterval(_poll_interval);
+
           // The polling interval is returned in seconds, so we need to multiply by 1000.
-          _poll_interval = setInterval(poll_exam_status, parseInt(data.polling_interval) * 1000);
+          set_poll_interval(parseInt(data.polling_intervall));
         });
       }