Simplify negotiation. Drop MSIE hacks. Etc.

1 files changed, 8 insertions, 0 deletions

diff --git a/djangorestframework/exceptions.py b/djangorestframework/exceptions.py
index 6930515d..a405a885 100644
--- a/djangorestframework/exceptions.py
+++ b/djangorestframework/exceptions.py
@@ -31,6 +31,14 @@ class PermissionDenied(APIException):
         self.detail = detail or self.default_detail
 
 
+class InvalidFormat(APIException):
+    status_code = status.HTTP_404_NOT_FOUND
+    default_detail = "Format suffix '.%s' not found."
+
+    def __init__(self, format, detail=None):
+        self.detail = (detail or self.default_detail) % format
+
+
 class MethodNotAllowed(APIException):
     status_code = status.HTTP_405_METHOD_NOT_ALLOWED
     default_detail = "Method '%s' not allowed."