继承IHttpModule

 

1、新建一个类库，FilterLibrary

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web;

namespace FilterLibrary
{
    public sealed class HttpModule : IHttpModule
    {

        public void Dispose()
        {
            throw new NotImplementedException();
        }

        public void Init(HttpApplication context)
        {
            context.BeginRequest += new EventHandler(context_BeginRequest);
        }
        void context_BeginRequest(object sender,EventArgs e)
        {
            HttpApplication application = sender as HttpApplication;
            HttpContext current = HttpContext.Current;
            HttpRequest request = current.Request;
            application.Context.Response.Write("第三方过滤器"+request.RawUrl);
        }
    }
}

 

2、web.config中注册

<add name="HttpModule" type="FilterLibrary.HttpModule,FilterLibrary"/>
name：类名，type：命名空间名称+类名，逗号分隔，+命名空间名称

 <system.webServer>
    <validation validateIntegratedModeConfiguration="false"/>
    <modules>
      <remove name="DotNetCasClient"/>
      <add name="DotNetCasClient" type="DotNetCasClient.CasAuthenticationModule,DotNetCasClient"/>
      <!--<add name="FirstModule" type="FilterLibrary,FirstModule"/>-->
      <add name="HttpModule" type="FilterLibrary.HttpModule,FilterLibrary"/>
    </modules>
    <httpProtocol>
      <customHeaders>
        <add name="Access-Control-Allow-Origin" value="*"/>
        <add name="Access-Control-Allow-Headers" value="Content-Type"/>
        <add name="Access-Control-Allow-Methods" value="GET, POST, PUT, DELETE, OPTIONS"/>
      </customHeaders>
    </httpProtocol>
    <handlers>
      <remove name="ExtensionlessUrlHandler-Integrated-4.0"/>
      <!--<remove name="OPTIONSVerbHandler" />-->
      <remove name="TRACEVerbHandler"/>
      <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0"/>
    </handlers>
  </system.webServer>