Add Response::getStream that return STDOUT resource

Author: Metalaka

Response/Response.php

@@ -916,6 +916,16 @@ public function truncate($size)
         return true;
     }
 
+    /**
+     * Get the current stream.
+     *
+     * @return  resource
+     */
+    public function getStream()
+    {
+        return fopen('php://stdout', 'w');
+    }
+
     /**
      * Get this object hash.
      *