Conditionally add custom IActionResultExecutor to work with minimal APIs

src/ProblemDetails/MinimalApiResultExecutor.cs

@@ -0,0 +1,16 @@
+#if NET6_0_OR_GREATER
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.Infrastructure;
+using System.Threading.Tasks;
+
+namespace Hellang.Middleware.ProblemDetails
+{
+    internal class MinimalApiResultExecutor : IActionResultExecutor<ObjectResult>
+    {
+        public Task ExecuteAsync(ActionContext context, ObjectResult result) =>
+            Results.Json(result.Value, options: null, "application/problem+json", result.StatusCode)
+                .ExecuteAsync(context.HttpContext);
+    }
+}
+#endif

src/ProblemDetails/ProblemDetails.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <Version>6.4.4</Version>
-    <TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>
+    <Version>6.5.0</Version>
+    <TargetFrameworks>netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
     <AssemblyName>Hellang.Middleware.ProblemDetails</AssemblyName>
     <RootNamespace>Hellang.Middleware.ProblemDetails</RootNamespace>
     <Description>Error handling middleware, using RFC7807</Description>

src/ProblemDetails/ProblemDetailsExtensions.cs

@@ -1,9 +1,13 @@
-using System;
+using System;
 using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.Infrastructure;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.DependencyInjection.Extensions;
 using Microsoft.Extensions.Options;
+using LibProblemDetailsFactory = Hellang.Middleware.ProblemDetails.ProblemDetailsFactory;
 
+// TODO: Move to Microsoft.Extensions.DependencyInjection
 namespace Hellang.Middleware.ProblemDetails
 {
     public static class ProblemDetailsExtensions
@@ -31,18 +35,22 @@ public static IServiceCollection AddProblemDetails(this IServiceCollection servi
                 services.Configure(configure);
             }
 
-            services.TryAddSingleton<ProblemDetailsFactory>();
+            services.TryAddSingleton<LibProblemDetailsFactory>();
             services.TryAddSingleton<ProblemDetailsMarkerService, ProblemDetailsMarkerService>();
             services.TryAddEnumerable(ServiceDescriptor.Transient<IConfigureOptions<ProblemDetailsOptions>, ProblemDetailsOptionsSetup>());
 
+#if NET6_0_OR_GREATER
+            services.TryAddSingleton<IActionResultExecutor<ObjectResult>, MinimalApiResultExecutor>();
+#endif
+
             return services;
         }
 
         /// <summary>
         /// Adds the <see cref="ProblemDetailsMiddleware"/> to the application pipeline.
         /// </summary>
         /// <param name="app">The application builder to add the middleware to.</param>
-        /// <exception cref="InvalidOperationException">If <see cref="AddProblemDetails(Microsoft.Extensions.DependencyInjection.IServiceCollection)"/> hasn't been called.</exception>
+        /// <exception cref="InvalidOperationException">If <see cref="AddProblemDetails(IServiceCollection)"/> hasn't been called.</exception>
         public static IApplicationBuilder UseProblemDetails(this IApplicationBuilder app)
         {
             var markerService = app.ApplicationServices.GetService<ProblemDetailsMarkerService>();