.net core MVC Filters 过滤器介绍
2024-08-23 15:57:08
一、过滤器的优级依次介绍如下(逐次递减)：
Authorization Filter -> Resource Filter -> Acton Filter -> Exception Filter -> Result Filter
的.net Core MVC 中同步过滤器，新增了异步过滤器，对数据可以进行异步处理。
1、Authorization Filter （权限过滤器）
/// <summary>
/// 权限过滤器
/// </summary>
public class GlobalAuthorizationFilter : Attribute, IAuthorizationFilter
{
/// <summary>
/// 优化权最高的过滤器
/// </summary>
/// <param name="context"></param>
public void OnAuthorization(AuthorizationFilterContext context)
{
//context.Result = new ObjectResult("IAuthorizationFilter 过滤输出");
Console.WriteLine("IAuthorizationFilter 过滤输出");
}
}
同步权限过滤器
/// <summary>
/// 异步权限过滤器
/// </summary>
public class GlobalAsyncAuthorizationFilter : Attribute, IAsyncAuthorizationFilter
{
/// <summary>
/// 执行异步Action 过滤器
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public async Task OnAuthorizationAsync(AuthorizationFilterContext context)
{
Console.WriteLine("IAsyncAuthorizationFilter 拦截输出");
await Task.CompletedTask;
}
}
异步权限过滤器
2、Resource Filter （资源过滤器）
/// <summary>
/// 资源过滤器
/// </summary>
public class GlobalResourceFilter : IResourceFilter
{
/// <summary>
/// 获取资源后拦截
/// </summary>
/// <param name="context"></param>
public void OnResourceExecuted(ResourceExecutedContext context)
{
Console.WriteLine("IResourceFilter OnResourceExecuted 输出");
} /// <summary>
/// 获取资源前拦截
/// </summary>
/// <param name="context"></param>
public void OnResourceExecuting(ResourceExecutingContext context)
{
Console.WriteLine("IResourceFilter OnResourceExecuting 输出");
}
}
同步资源过滤器
/// <summary>
/// 异步资源加载过滤器
/// </summary>
public class GlobalAsyncResourceFilter : IAsyncResourceFilter
{
/// <summary>
///
/// </summary>
/// <param name="context"></param>
/// <param name="next"></param>
/// <returns></returns>
public async Task OnResourceExecutionAsync(ResourceExecutingContext context, ResourceExecutionDelegate next)
{
// 执行前
await next.Invoke(); // 执行后
await OnExecutedAsync(context);
} /// <summary>
/// 执行后
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public async Task OnExecutedAsync(ResourceExecutingContext context)
{
Console.WriteLine("IAsyncResourceFilter 执行后");
await Task.CompletedTask;
}
}
资源异步过滤器
3、Acton Filter (Action 过滤器)
/// <summary>
/// Acion过滤器
/// </summary>
public class GlobalActonFilter : Attribute, IActionFilter
{
/// <summary>
/// Acion 执行后拦截
/// </summary>
/// <param name="context"></param>
public void OnActionExecuted(ActionExecutedContext context)
{
Console.WriteLine("IActionFilter OnActionExecuted Acion 执行后拦截");
} /// <summary>
/// Acion 执行前拦截
/// </summary>
/// <param name="context"></param>
public void OnActionExecuting(ActionExecutingContext context)
{
Console.WriteLine("IActionFilter OnActionExecuting Acion 执行前拦截");
}
}
同步Acion过滤器
/// <summary>
/// 异步 Action 过滤器
/// </summary>
public class GlobalAsyncActonFilter : Attribute, IAsyncActionFilter
{
/// <summary>
/// 执行异步Action 过滤器
/// </summary>
/// <param name="context"></param>
/// <param name="next"></param>
/// <returns></returns>
public async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
{
// 执行前
await next.Invoke(); // 执行后
await OnExecutedAsync(context);
} /// <summary>
/// 执行后
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public async Task OnExecutedAsync(ActionExecutingContext context)
{
Console.WriteLine("IAsyncActionFilter 执行后");
await Task.CompletedTask;
}
}
异步Action过滤器
4、Exception Filter (异常过滤器)
/// <summary>
/// 异常全局过滤器
/// </summary>
public class GlobalExceptionFilter : IExceptionFilter
{
/// <summary>
/// 异常处理
/// </summary>
/// <param name="context">异常上下文</param>
public void OnException(ExceptionContext context)
{
Console.WriteLine(context.Exception);
//如果这里设为false，就表示告诉MVC框架，我没有处理这个错误。然后让它跳转到自己定义的错误页（设为true的话，就表示告诉MVC框架，异常我已经处理了。不需要在跳转到错误页了，也部会抛出黄页了）
context.ExceptionHandled = false;
}
}
同步异常全局过滤器
/// <summary>
/// 异步异常全局过滤器
/// </summary>
public class GlobalAsyncExceptionFilter : IAsyncExceptionFilter
{
/// <summary>
/// 异常异步处理
/// </summary>
/// <param name="context">异常上下文</param>
/// <returns></returns>
public async Task OnExceptionAsync(ExceptionContext context)
{
Console.WriteLine(context.Exception.Message);
//如果这里设为false，就表示告诉MVC框架，我没有处理这个错误。然后让它跳转到自己定义的错误页（设为true的话，就表示告诉MVC框架，异常我已经处理了。不需要在跳转到错误页了，也部会抛出黄页了）
context.ExceptionHandled = false;
await Task.CompletedTask;
}
异步异常全局过滤器
5、Result Filter (结果过滤器)
/// <summary>
/// 结果过滤器
/// </summary>
public class GlobalResultFilter : IResultFilter
{
/// <summary>
/// 动作结果执行后
/// </summary>
/// <param name="context"></param>
public void OnResultExecuted(ResultExecutedContext context)
{
Console.WriteLine("IResultFilter OnResultExecuted Acion 动作结果执行后");
} /// <summary>
/// 动作结果执行前
/// </summary>
/// <param name="context"></param>
public void OnResultExecuting(ResultExecutingContext context)
{
Console.WriteLine("IResultFilter OnResultExecuting Acion 动作结果执行前");
}
}
同步结果过滤器
/// <summary>
/// 异步 结果过滤器
/// </summary>
public class GlobalAsyncResultFilter : IAsyncResultFilter
{ /// <summary>
/// 动作结果执行后
/// </summary>
/// <param name="context"></param>
/// <param name="next"></param>
/// <returns></returns>
public async Task OnResultExecutionAsync(ResultExecutingContext context, ResultExecutionDelegate next)
{
await next.Invoke();
await OnExecutedAsync(context);
} /// <summary>
/// 执行后
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public async Task OnExecutedAsync(ResultExecutingContext context)
{
Console.WriteLine("IAsyncResultFilter 执行");
await Task.CompletedTask;
}
}
异步 结果过滤器
Demo 源码：https://github.com/intotf/netCore/tree/master/WebFilters
最新文章
- magento app/design/adminhtml/default/default/template/sales/order/view/info.phtml XSS Vul
- MVC中Form表单的提交
- sdk和ndk
- Java面向对象的封装
- 49个jquery代码经典片段
- HashMap 实现详解
- java中文件操作
- 使用less函数实现不同背景的CSS样式
- javascript常用开发笔记：一个简单强大的js日期格式化方法
- ASP.Net Core开发(踩坑)指南
- 《Android插件化开发指南》勘误
- Linux squid代理
- 设置防火强开机自启，以及没有成功的tomcat开机自启
- caffe网络中屏蔽某一层的输出Silence层
- createrepo local http yum
- EClassNotFound
- Android Studio 快速实现上传项目到Github（详细步骤）
- Bootstrap的介绍和响应式媒体查询
- php图片采集后按原路径保存图片
- Java 中的方法内部类