feat: implement CommaDelimitedArrayModelBinderProvider

Jellyfin.Api/Controllers/SessionController.cs

@@ -379,7 +379,7 @@ namespace Jellyfin.Api.Controllers
         public ActionResult PostCapabilities(
             [FromQuery] string? id,
             [FromQuery] string? playableMediaTypes,
-            [FromQuery][ModelBinder(typeof(CommaDelimitedArrayModelBinder))] GeneralCommandType[] supportedCommands,
+            [FromQuery] GeneralCommandType[] supportedCommands,
             [FromQuery] bool supportsMediaControl = false,
             [FromQuery] bool supportsSync = false,
             [FromQuery] bool supportsPersistentIdentifier = true)

Jellyfin.Api/ModelBinders/CommaDelimitedArrayModelBinderProvider.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Microsoft.AspNetCore.Mvc.ModelBinding;
+
+namespace Jellyfin.Api.ModelBinders
+{
+    /// <summary>
+    /// Comma delimited array model binder provider.
+    /// </summary>
+    public class CommaDelimitedArrayModelBinderProvider : IModelBinderProvider
+    {
+        private readonly IModelBinder _binder;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CommaDelimitedArrayModelBinderProvider"/> class.
+        /// </summary>
+        public CommaDelimitedArrayModelBinderProvider()
+        {
+            _binder = new CommaDelimitedArrayModelBinder();
+        }
+
+        /// <inheritdoc />
+        public IModelBinder? GetBinder(ModelBinderProviderContext context)
+        {
+            return context.Metadata.ModelType.IsArray ? _binder : null;
+        }
+    }
+}

Jellyfin.Server/Extensions/ApiServiceCollectionExtensions.cs

@@ -16,6 +16,7 @@ using Jellyfin.Api.Auth.LocalAccessPolicy;
 using Jellyfin.Api.Auth.RequiresElevationPolicy;
 using Jellyfin.Api.Constants;
 using Jellyfin.Api.Controllers;
+using Jellyfin.Api.ModelBinders;
 using Jellyfin.Server.Configuration;
 using Jellyfin.Server.Filters;
 using Jellyfin.Server.Formatters;
@@ -166,6 +167,8 @@ namespace Jellyfin.Server.Extensions
 
                     opts.OutputFormatters.Add(new CssOutputFormatter());
                     opts.OutputFormatters.Add(new XmlOutputFormatter());
+
+                    opts.ModelBinderProviders.Insert(0, new CommaDelimitedArrayModelBinderProvider());
                 })
 
                 // Clear app parts to avoid other assemblies being picked up