251 Resource Filter

示例

新建FeatureDisabledResourceFilter.cs

using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Filters;

namespace CRUDExample.Filters.ResourceFilters
{
    public class FeatureDisabledResourceFilter : IAsyncResourceFilter
    {
        private readonly ILogger<FeatureDisabledResourceFilter> _logger;
        private readonly bool _isDisabled;

        public FeatureDisabledResourceFilter(ILogger<FeatureDisabledResourceFilter> logger, bool isDisabled = true)
        {
            _logger = logger;
            _isDisabled = isDisabled;
        }

        public async Task OnResourceExecutionAsync(ResourceExecutingContext context, ResourceExecutionDelegate next)
        {
            //TO DO: before logic
            _logger.LogInformation("{FilterName}.{MethodName} - before", nameof(FeatureDisabledResourceFilter), nameof(OnResourceExecutionAsync));
            if (_isDisabled)
            {
                //context.Result = new NotFoundResult(); //404 - Note Found

                context.Result = new StatusCodeResult(501); //501 - Not Implemented
            }
            else 
            {
                await next();
                // TO DO: after logic
            _logger.LogInformation("{FilterName}.{MethodName} - after", nameof(FeatureDisabledResourceFilter), nameof(OnResourceExecutionAsync));
            }
        }
    }
}

PersonsController.cs中添加TypeFilter

//处理Post请求
[Route("[action]")]
[HttpPost]
[TypeFilter(typeof(PersonCreateAndEditPostActionFilter))]
[TypeFilter(typeof(FeatureDisabledResourceFilter))]
public async Task<IActionResult> Create(PersonAddRequest personAddRequest)

执行程序点击Create后显示

PersonsController.cs中添加TypeFilter中添加false参数或者删除筛选器后，程序正常运行

//处理Post请求
[Route("[action]")]
[HttpPost]
[TypeFilter(typeof(PersonCreateAndEditPostActionFilter))]
[TypeFilter(typeof(FeatureDisabledResourceFilter), Arguments = new object[] {false})]
public async Task<IActionResult> Create(PersonAddRequest personAddRequest)

Gitee获取源码：

https://gitee.com/huang_jianhua0101/asp.-net-core-8.git