From 949e4d3e64a73102d0a87c8b34918397a2cec303 Mon Sep 17 00:00:00 2001
From: ConfusedPolarBear <33811686+ConfusedPolarBear@users.noreply.github.com>
Date: Mon, 18 May 2020 16:54:36 -0500
Subject: [PATCH] Apply suggestions from code review

---
 Emby.Server.Implementations/HttpServer/HttpListenerHost.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Emby.Server.Implementations/HttpServer/HttpListenerHost.cs b/Emby.Server.Implementations/HttpServer/HttpListenerHost.cs
index 9a4e858a51..7de4f168c1 100644
--- a/Emby.Server.Implementations/HttpServer/HttpListenerHost.cs
+++ b/Emby.Server.Implementations/HttpServer/HttpListenerHost.cs
@@ -499,7 +499,10 @@ namespace Emby.Server.Implementations.HttpServer
 
                     foreach (var (key, value) in GetDefaultCorsHeaders(httpReq))
                     {
-                        httpRes.Headers.Add(key, value);
+                        if (!httpRes.Headers.ContainsKey(key))
+                        {
+                            httpRes.Headers.Add(key, value);
+                        }
                     }
 
                     bool ignoreStackTrace =