Edited wiki page LifeOfARequest through web user interface.
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* Django
* middleware modules
* request handler matching
- *
* Django
@@ -50,3 +49,5 @@
5. The response is returned to Django layer
Right now we will describe each step individually. Let us start with the first one. At the beginning of each request processing, there is initialization phase which is performed by by init() function. It it responsible for returning three values: a RequestData object associated with the request, an instance of AccessChecker and Mutator.
+
+The second step is to check if the application is currently in the maintenance mode. This may happen if the option has been enabled by developers or if some App Engine features are limited or have been purposely turned off. The latter may happen, for example, if datastore writes are disabled or if there is scheduled maintenance undergoing.
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