Move ResponseLater into exceptions module

channels/exceptions.py

@@ -0,0 +1,16 @@
+class ConsumeLater(Exception):
+    """
+    Exception that says that the current message should be re-queued back
+    onto its channel as it's not ready to be consumd yet (e.g. global order
+    is being enforced)
+    """
+    pass
+
+
+class ResponseLater(Exception):
+    """
+    Exception raised inside a Django view when the view has passed
+    responsibility for the response to another consumer, and so is not
+    returning a response.
+    """
+    pass

channels/handler.py

@@ -14,6 +14,8 @@ from django.core.urlresolvers import set_script_prefix
 from django.utils import six
 from django.utils.functional import cached_property
 
+from .exceptions import ResponseLater as ResponseLaterOuter
+
 logger = logging.getLogger('django.request')
 
 
@@ -23,13 +25,7 @@ class AsgiRequest(http.HttpRequest):
     dict, and wraps request body handling.
     """
 
-    class ResponseLater(Exception):
+    ResponseLater = ResponseLaterOuter
-        """
-        Exception that will cause any handler to skip around response
-        transmission and presume something else will do it later.
-        """
-        def __init__(self):
-            Exception.__init__(self, "Response later")
 
     def __init__(self, message):
         self.message = message