Move json profiles to constant strings.

Jellyfin.Api/BaseJellyfinApiController.cs

@@ -1,4 +1,5 @@
 using System.Net.Mime;
+using MediaBrowser.Common.Json;
 using Microsoft.AspNetCore.Mvc;
 
 namespace Jellyfin.Api
@@ -10,8 +11,8 @@ namespace Jellyfin.Api
     [Route("[controller]")]
     [Produces(
         MediaTypeNames.Application.Json,
-        MediaTypeNames.Application.Json + "; profile=\"CamelCase\"",
-        MediaTypeNames.Application.Json + "; profile=\"PascalCase\"")]
+        JsonDefaults.CamelCaseMediaType,
+        JsonDefaults.PascalCaseMediaType)]
     public class BaseJellyfinApiController : ControllerBase
     {
     }

Jellyfin.Server/Formatters/CamelCaseJsonProfileFormatter.cs

@@ -15,7 +15,7 @@ namespace Jellyfin.Server.Formatters
         public CamelCaseJsonProfileFormatter() : base(JsonDefaults.GetCamelCaseOptions())
         {
             SupportedMediaTypes.Clear();
-            SupportedMediaTypes.Add(MediaTypeHeaderValue.Parse("application/json; profile=\"CamelCase\""));
+            SupportedMediaTypes.Add(MediaTypeHeaderValue.Parse(JsonDefaults.CamelCaseMediaType));
         }
     }
 }

Jellyfin.Server/Formatters/PascalCaseJsonProfileFormatter.cs

@@ -18,7 +18,7 @@ namespace Jellyfin.Server.Formatters
             SupportedMediaTypes.Clear();
             // Add application/json for default formatter
             SupportedMediaTypes.Add(MediaTypeHeaderValue.Parse(MediaTypeNames.Application.Json));
-            SupportedMediaTypes.Add(MediaTypeHeaderValue.Parse("application/json; profile=\"PascalCase\""));
+            SupportedMediaTypes.Add(MediaTypeHeaderValue.Parse(JsonDefaults.PascalCaseMediaType));
         }
     }
 }

MediaBrowser.Common/Json/JsonDefaults.cs

@@ -9,6 +9,16 @@ namespace MediaBrowser.Common.Json
     /// </summary>
     public static class JsonDefaults
     {
+        /// <summary>
+        /// Pascal case json profile media type.
+        /// </summary>
+        public const string PascalCaseMediaType = "application/json; profile=\"PascalCase\"";
+
+        /// <summary>
+        /// Camel case json profile media type.
+        /// </summary>
+        public const string CamelCaseMediaType = "application/json; profile=\"CamelCase\"";
+
         /// <summary>
         /// Gets the default <see cref="JsonSerializerOptions" /> options.
         /// </summary>