From 901953d98803344a8b52158f681a230ab1438e21 Mon Sep 17 00:00:00 2001
From: Raphael Michel <mail@raphaelmichel.de>
Date: Fri, 9 Nov 2018 11:13:24 +0100
Subject: [PATCH] Add a Retry-After to 409 responses

---
 src/pretix/api/exception.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/pretix/api/exception.py b/src/pretix/api/exception.py
index 47869e7f4..5c1f033ba 100644
--- a/src/pretix/api/exception.py
+++ b/src/pretix/api/exception.py
@@ -10,7 +10,10 @@ def custom_exception_handler(exc, context):
     if isinstance(exc, LockTimeoutException):
         response = Response(
             {'detail': 'The server was too busy to process your request. Please try again.'},
-            status=status.HTTP_409_CONFLICT
+            status=status.HTTP_409_CONFLICT,
+            headers={
+                'Retry-After': 5
+            }
         )
 
     return response