From 6f4151c067b435de7145e78e59f4c5e2a49c8312 Mon Sep 17 00:00:00 2001
From: Bart Koelman <bart@degreed.com>
Date: Tue, 8 Dec 2020 15:04:07 +0100
Subject: [PATCH] Fixed: write content type on invalid Accept headers, to
 enable FireFox to render the response as json.

---
 src/JsonApiDotNetCore/Middleware/JsonApiMiddleware.cs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/JsonApiDotNetCore/Middleware/JsonApiMiddleware.cs b/src/JsonApiDotNetCore/Middleware/JsonApiMiddleware.cs
index fee92a14dc..84d861ab26 100644
--- a/src/JsonApiDotNetCore/Middleware/JsonApiMiddleware.cs
+++ b/src/JsonApiDotNetCore/Middleware/JsonApiMiddleware.cs
@@ -140,6 +140,7 @@ private static async Task<bool> ValidateAcceptHeaderAsync(HttpContext httpContex
 
         private static async Task FlushResponseAsync(HttpResponse httpResponse, JsonSerializerSettings serializerSettings, Error error)
         {
+            httpResponse.ContentType = HeaderConstants.MediaType;
             httpResponse.StatusCode = (int) error.StatusCode;
 
             JsonSerializer serializer = JsonSerializer.CreateDefault(serializerSettings);