From ee6b17187fbf19d498c16bd46ec6dd6aaf86f453 Mon Sep 17 00:00:00 2001
From: Viktor Lomakin <vl.dart.py@gmail.com>
Date: Wed, 9 Oct 2019 12:20:17 +0300
Subject: Fixed #30812 -- Made ConditionalGetMiddleware set ETag only for
 responses with non-empty content.

---
 django/utils/cache.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'django/utils')

diff --git a/django/utils/cache.py b/django/utils/cache.py
index 2b37acfd44..3ee01a1e94 100644
--- a/django/utils/cache.py
+++ b/django/utils/cache.py
@@ -98,7 +98,7 @@ def get_max_age(response):
 
 
 def set_response_etag(response):
-    if not response.streaming:
+    if not response.streaming and response.content:
         response['ETag'] = quote_etag(hashlib.md5(response.content).hexdigest())
     return response
 
-- 
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