Handle If-None-Match

AUTHORS

@@ -18,3 +18,4 @@ Patches and Suggestions
 - Radomir Stevanovic (http://github.com/randomir)
 - Steven Honson
 - Cory Benfield (Lukasa) <cory@lukasa.co.uk>
+- Matt Robenolt (https://github.com/mattrobenolt)

README.md

@@ -30,7 +30,7 @@ Freely hosted in [HTTP](http://httpbin.org) &
 - [`/html`](http://httpbin.org/html) Renders an HTML Page.
 - [`/robots.txt`](http://httpbin.org/robots.txt) Returns some robots.txt rules.
 - [`/deny`](http://httpbin.org/deny) Denied by robots.txt file.
-- [`/cache`](http://httpbin.org/cache) Returns 200 unless an If-Modified-Since header is provided, when it returns a 304.
+- [`/cache`](http://httpbin.org/cache) Returns 200 unless an If-Modified-Since or If-None-Match header is provided, when it returns a 304.
 
 
 ## DESCRIPTION

httpbin/core.py

@@ -332,10 +332,10 @@ def decode_base64(value):
 
 @app.route('/cache', methods=('GET',))
 def cache():
-    """Returns a 304 if an If-Modified-Since header is present. Returns the same as a GET otherwise."""
-    if_modified = request.headers.get('If-Modified-Since')
+    """Returns a 304 if an If-Modified-Since header or If-None-Match is present. Returns the same as a GET otherwise."""
+    is_conditional = request.headers.get('If-Modified-Since') or request.headers.get('If-None-Match')
 
-    if if_modified is None:
+    if is_conditional is None:
         return view_get()
     else:
         return status_code(304)