From e5c736aab4b707eba9288cf5e12ffda937bbc32b Mon Sep 17 00:00:00 2001
From: Noah Hilverling <noah.hilverling@netways.de>
Date: Tue, 18 Oct 2016 10:13:58 +0200
Subject: [PATCH] Response: Use method getHeader to check if Content-Type is
 set already

refs #12161
---
 library/Icinga/Web/Response.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/library/Icinga/Web/Response.php b/library/Icinga/Web/Response.php
index 2a90a97b1..ac2573f8d 100644
--- a/library/Icinga/Web/Response.php
+++ b/library/Icinga/Web/Response.php
@@ -300,7 +300,9 @@ class Response extends Zend_Controller_Response_Http
             }
         }
 
-        $this->setHeader('Content-Type', $this->getContentType(), false);
+        if (!$this->getHeader('Content-Type', true)) {
+            $this->setHeader('Content-Type', $this->getContentType());
+        }
     }
 
     /**