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ControllerActionFilter.cs
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ControllerActionFilter.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.AspNetCore.Mvc.Core;
namespace Microsoft.AspNetCore.Mvc.Filters;
/// <summary>
/// A filter implementation which delegates to the controller for action filter interfaces.
/// </summary>
internal sealed class ControllerActionFilter : IAsyncActionFilter, IOrderedFilter
{
// Controller-filter methods run farthest from the action by default.
/// <inheritdoc />
public int Order { get; set; } = int.MinValue;
/// <inheritdoc />
public Task OnActionExecutionAsync(
ActionExecutingContext context,
ActionExecutionDelegate next)
{
ArgumentNullException.ThrowIfNull(context);
ArgumentNullException.ThrowIfNull(next);
var controller = context.Controller;
if (controller == null)
{
throw new InvalidOperationException(Resources.FormatPropertyOfTypeCannotBeNull(
nameof(context.Controller),
nameof(ActionExecutingContext)));
}
if (controller is IAsyncActionFilter asyncActionFilter)
{
return asyncActionFilter.OnActionExecutionAsync(context, next);
}
else if (controller is IActionFilter actionFilter)
{
return ExecuteActionFilter(context, next, actionFilter);
}
else
{
return next();
}
}
private static async Task ExecuteActionFilter(
ActionExecutingContext context,
ActionExecutionDelegate next,
IActionFilter actionFilter)
{
actionFilter.OnActionExecuting(context);
if (context.Result == null)
{
actionFilter.OnActionExecuted(await next());
}
}
}