From 780b77af58b0a00e062b7f9b12423a2dc181fd8c Mon Sep 17 00:00:00 2001
From: Fabien Potencier <fabien.potencier@gmail.com>
Date: Fri, 27 Sep 2013 17:45:20 +0200
Subject: [PATCH] [HttpKernel] made the cache key generation configurable for
 the default HttpCache store

---
 .../Component/HttpKernel/HttpCache/Store.php  | 21 ++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/Symfony/Component/HttpKernel/HttpCache/Store.php b/src/Symfony/Component/HttpKernel/HttpCache/Store.php
index acddb82652..8e4234d126 100644
--- a/src/Symfony/Component/HttpKernel/HttpCache/Store.php
+++ b/src/Symfony/Component/HttpKernel/HttpCache/Store.php
@@ -364,6 +364,25 @@ class Store implements StoreInterface
         return $this->root.DIRECTORY_SEPARATOR.substr($key, 0, 2).DIRECTORY_SEPARATOR.substr($key, 2, 2).DIRECTORY_SEPARATOR.substr($key, 4, 2).DIRECTORY_SEPARATOR.substr($key, 6);
     }
 
+    /**
+     * Generates a cache key for the given Request.
+     *
+     * This method should return a key that must only depend on a
+     * normalized version of the request URI.
+     *
+     * If the same URI can have more than one representation, based on some
+     * headers, use a Vary header to indicate them, and each representation will
+     * be stored independently under the same cache key.
+     *
+     * @param Request $request A Request instance
+     *
+     * @return string A key for the given Request
+     */
+    protected function generateCacheKey(Request $request)
+    {
+        return 'md'.hash('sha256', $request->getUri());
+    }
+
     /**
      * Returns a cache key for the given Request.
      *
@@ -377,7 +396,7 @@ class Store implements StoreInterface
             return $this->keyCache[$request];
         }
 
-        return $this->keyCache[$request] = 'md'.hash('sha256', $request->getUri());
+        return $this->keyCache[$request] = $this->generateCacheKey($request);
     }
 
     /**