From de2ce58a4ff41bf91eedb14ad421c620e4c7f8ee Mon Sep 17 00:00:00 2001
From: Nicolas Grekas <nicolas.grekas@gmail.com>
Date: Thu, 1 Nov 2018 18:15:47 +0100
Subject: [PATCH] [HttpFoundation] replace any preexisting Content-Type headers

---
 src/Symfony/Component/HttpFoundation/Response.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Symfony/Component/HttpFoundation/Response.php b/src/Symfony/Component/HttpFoundation/Response.php
index 6b6308e36c..a4ad0e66ae 100644
--- a/src/Symfony/Component/HttpFoundation/Response.php
+++ b/src/Symfony/Component/HttpFoundation/Response.php
@@ -344,8 +344,9 @@ class Response
 
         // headers
         foreach ($this->headers->allPreserveCase() as $name => $values) {
+            $replace = 0 === strcasecmp($name, 'Content-Type');
             foreach ($values as $value) {
-                header($name.': '.$value, false, $this->statusCode);
+                header($name.': '.$value, $replace, $this->statusCode);
             }
         }