From 1f9761e85d0a9ac93c05984eeb8041389e9fc166 Mon Sep 17 00:00:00 2001
From: Sam <sam.saffron@gmail.com>
Date: Tue, 16 Jun 2015 10:30:06 +1000
Subject: [PATCH] FEATURE: add a header to denote an anonymous req was cached

(X-Discourse-Cached)
---
 lib/middleware/anonymous_cache.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/middleware/anonymous_cache.rb b/lib/middleware/anonymous_cache.rb
index d315c53a5..a65eb2df1 100644
--- a/lib/middleware/anonymous_cache.rb
+++ b/lib/middleware/anonymous_cache.rb
@@ -89,6 +89,7 @@ module Middleware
 
         if status == 200 && cache_duration
           headers_stripped = headers.dup.delete_if{|k, _| ["Set-Cookie","X-MiniProfiler-Ids"].include? k}
+          headers_stripped["X-Discourse-Cached"] = "true"
           parts = []
           response.each do |part|
             parts << part