ASP.NET MVC 4拦截所有传入的请求

Question

有没有办法让我能够将所有传入的请求捕获到我的ASP.NET MVC 4应用程序并运行一些代码,然后再继续请求到指定的控制器/操作？

我需要使用现有服务运行一些自定义身份验证代码,并且要正确执行此操作,我需要能够拦截来自所有客户端的所有传入请求,以便使用其他服务仔细检查某些内容.

Answer 1

最正确的方法是创建一个继承ActionFilterAttribute和override OnActionExecuting方法的类.然后可以在GlobalFilters中注册Global.asax.cs

当然,这只会拦截实际拥有路线的请求.

Answer 2

您可以使用HttpModule来完成此任务.这是我用来计算所有请求的处理时间的示例:

using System;
using System.Diagnostics;
using System.Web;

namespace Sample.HttpModules
{
    public class PerformanceMonitorModule : IHttpModule
    {

        public void Init(HttpApplication httpApp)
        {
            httpApp.BeginRequest += OnBeginRequest;
            httpApp.EndRequest += OnEndRequest;
            httpApp.PreSendRequestHeaders += OnHeaderSent;
        }

        public void OnHeaderSent(object sender, EventArgs e)
        {
            var httpApp = (HttpApplication)sender;
            httpApp.Context.Items["HeadersSent"] = true;
        }

        // Record the time of the begin request event.
        public void OnBeginRequest(Object sender, EventArgs e)
        {
            var httpApp = (HttpApplication)sender;
            if (httpApp.Request.Path.StartsWith("/media/")) return;
            var timer = new Stopwatch();
            httpApp.Context.Items["Timer"] = timer;
            httpApp.Context.Items["HeadersSent"] = false;
            timer.Start();
        }

        public void OnEndRequest(Object sender, EventArgs e)
        {
            var httpApp = (HttpApplication)sender;
            if (httpApp.Request.Path.StartsWith("/media/")) return;
            var timer = (Stopwatch)httpApp.Context.Items["Timer"];

            if (timer != null)
            {
                timer.Stop();
                if (!(bool)httpApp.Context.Items["HeadersSent"])
                {
                    httpApp.Context.Response.AppendHeader("ProcessTime",
                                                          ((double)timer.ElapsedTicks / Stopwatch.Frequency) * 1000 +
                                                          " ms.");
                }
            }

            httpApp.Context.Items.Remove("Timer");
            httpApp.Context.Items.Remove("HeadersSent");

        }

        public void Dispose() { /* Not needed */ }
    }

}

这就是你在Web.Config中注册模块的方法:

<system.webServer>
    <modules runAllManagedModulesForAllRequests="true">
        <add name="PerformanceMonitorModule" type="Sample.HttpModules.PerformanceMonitorModule" />
    </modules>
<//system.webServer>

Answer 3

我认为你搜索的是这个:

Application_BeginRequest()

http://www.dotnetcurry.com/showarticle.aspx?ID=126

你把它放进去了Global.asax.cs.

    protected void Application_BeginRequest(object sender, EventArgs e)
    {
        HttpContext.Current.Request.....;
    }

我用它来进行调试,但我不确定它对你的情况有多好.