Ignore request with swift.source in env

swift.source in env indicates request
that originate in swift middleware as a side
effect of another client request.

These requests should not be metered, this
fix adds a check for swift.source in env
and avoids generating a metering event.

Change-Id: I2ecbde8667cc366b192a2248abc93d0936956978
Closes-bug: 1485711

ceilometermiddleware/swift.py

@@ -161,9 +161,10 @@ class Swift(object):
 
     @_log_and_ignore_error
     def emit_event(self, env, bytes_received, bytes_sent, outcome='success'):
-        if (env.get('HTTP_X_SERVICE_PROJECT_ID') or
+        if ((env.get('HTTP_X_SERVICE_PROJECT_ID') or
                 env.get('HTTP_X_PROJECT_ID') or
-                env.get('HTTP_X_TENANT_ID')) in self.ignore_projects:
+                env.get('HTTP_X_TENANT_ID')) in self.ignore_projects or
+                env.get('swift.source') is not None):
             return
 
         path = urlparse.quote(env['PATH_INFO'])

ceilometermiddleware/tests/test_swift.py

@@ -381,3 +381,16 @@ class TestSwift(tests_base.TestCase):
             self.assertIsNone(metadata['container'])
             self.assertIsNone(metadata['object'])
             self.assertEqual('head', data[2]['target']['action'])
+
+    def test_put_with_swift_source(self):
+        app = swift.Swift(FakeApp(), {})
+
+        req = FakeRequest(
+            '/1.0/account/container/obj',
+            environ={'REQUEST_METHOD': 'PUT',
+                     'wsgi.input':
+                     six.moves.cStringIO('some stuff'),
+                     'swift.source': 'RL'})
+        with mock.patch('oslo_messaging.Notifier.info') as notify:
+            list(app(req.environ, self.start_response))
+            self.assertEqual(False, notify.called)