Fixed #879 -- Middleware loader now throws a better error for MIDDLEWARE_CLASSES…

Fixed #879 -- Middleware loader now throws a better error for MIDDLEWARE_CLASSES value without a dot. Thanks, Noah Slater

git-svn-id: http://code.djangoproject.com/svn/django/trunk@1355 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/handlers/base.py

@@ -17,7 +17,10 @@ class BaseHandler:
         self._response_middleware = []
         self._exception_middleware = []
         for middleware_path in settings.MIDDLEWARE_CLASSES:
-            dot = middleware_path.rindex('.')
+            try:
+                dot = middleware_path.rindex('.')
+            except ValueError:
+                raise exceptions.ImproperlyConfigured, '%s isn\'t look like a middleware module' % middleware_path
             mw_module, mw_classname = middleware_path[:dot], middleware_path[dot+1:]
             try:
                 mod = __import__(mw_module, '', '', [''])