Don't execute handler after filter if StatusCode >= 400

Author: captainsafia

src/Http/Http.Abstractions/src/IRouteHandlerFilter.cs

@@ -14,6 +14,7 @@ public interface IRouteHandlerFilter
     /// </summary>
     /// <param name="context">The <see cref="RouteHandlerFilterContext"/> associated with the current request/response.</param>
     /// <param name="next">The next filter in the pipeline.</param>
-    /// <returns>The result of calling the current filter.</returns>
+    /// <returns>An awaitable result of calling the handler and apply
+    /// any modifications made by filters in the pipeline.</returns>
     ValueTask<object?> InvokeAsync(RouteHandlerFilterContext context, Func<RouteHandlerFilterContext, ValueTask<object?>> next);
 }

src/Http/Http.Extensions/src/RequestDelegateFactory.cs

@@ -225,12 +225,12 @@ private static FactoryContext CreateFactoryContext(RequestDelegateFactoryOptions
     private static Func<RouteHandlerFilterContext, ValueTask<object?>> CreateFilterPipeline(MethodInfo methodInfo, Expression? target, FactoryContext factoryContext)
     {
         Debug.Assert(factoryContext.Filters is not null);
-        // httpContext.Response.StatusCode == 400
+        // httpContext.Response.StatusCode >= 400
         // ? Task.CompletedTask
         // : handler((string)context.Parameters[0], (int)context.Parameters[1])
         var filteredInvocation = Expression.Lambda<Func<RouteHandlerFilterContext, ValueTask<object?>>>(
             Expression.Condition(
-                Expression.Equal(FilterContextHttpContextStatusCodeExpr, Expression.Constant(400)),
+                Expression.GreaterThanOrEqual(FilterContextHttpContextStatusCodeExpr, Expression.Constant(400)),
                 CompletedValueTaskExpr,
                 Expression.Block(
                     new[] { TargetExpr },