ECOM-2150: Added the ga client fetching as a customer header in middleware

common/djangoapps/track/middleware.py

@@ -145,7 +145,7 @@ class TrackMiddleware(object):
         # this: _ga=GA1.2.1033501218.1368477899. The clientId is this part: 1033501218.1368477899.
         google_analytics_cookie = request.COOKIES.get('_ga')
         if google_analytics_cookie is None:
-            context['client_id'] = None
+            context['client_id'] = request.META.get('HTTP_X_EDX_GA_CLIENT_ID')
         else:
             context['client_id'] = '.'.join(google_analytics_cookie.split('.')[2:])
 

common/djangoapps/track/tests/test_middleware.py

@@ -136,12 +136,16 @@ class TrackMiddlewareTestCase(TestCase):
     def test_request_headers(self):
         ip_address = '10.0.0.0'
         user_agent = 'UnitTest/1.0'
+        client_id_header = '123.123'
 
-        factory = RequestFactory(REMOTE_ADDR=ip_address, HTTP_USER_AGENT=user_agent)
+        factory = RequestFactory(
+            REMOTE_ADDR=ip_address, HTTP_USER_AGENT=user_agent, HTTP_X_EDX_GA_CLIENT_ID=client_id_header
+        )
         request = factory.get('/some-path')
         context = self.get_context_for_request(request)
 
         self.assert_dict_subset(context, {
             'ip': ip_address,
             'agent': user_agent,
+            'client_id': client_id_header
         })