RealProxy AOP过滤方法的参数

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.Runtime.Remoting.Proxies;
using System.Runtime.Remoting.Messaging;
using System.Runtime.Remoting.Activation;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Services;
namespace TestRealProxy
{

    public class SqlVerifyProxy : RealProxy
    {
        MarshalByRefObject _target = null;
        public SqlVerifyProxy(Type type, MarshalByRefObject target)
            : base(type)
        {
            this._target = target;
        }
        //覆写Invoke，处理RealProxy截获的各种消息,
        //此种方式最简捷，但不能截获远程对象的激活,好在我们并不是真的要Remoting
        public override IMessage Invoke(IMessage msg)
        {
            IMethodCallMessage call = (IMethodCallMessage)msg;
            IConstructionCallMessage ctr = call as IConstructionCallMessage;
            IMethodReturnMessage back = null;
            //构造函数，只有ContextBoundObject(Inherit from MarshalByRefObject)对象才能截获构造函数
            if (ctr != null)
            {
                RealProxy defaultProxy = RemotingServices.GetRealProxy(_target);
                //如果不做下面这一步，_target还是一个没有直正实例化被代理对象的透明代理，
                //这样的话，会导致没有直正构建对象。
                defaultProxy.InitializeServerObject(ctr);
                //本类是一个RealProxy，它可通过GetTransparentProxy函数得到透明代理
                back = EnterpriseServicesHelper.CreateConstructionReturnMessage(ctr, (MarshalByRefObject)GetTransparentProxy());
            }
            //MarshalByRefObject对象就可截获普通的调用消息，
            //MarshalByRefObject对象告诉编译器，不能将其内部简单的成员函数优化成内联代码，
            //这样才能保证函数调用都能截获。
            else
            {
               
                IDictionary<string, object> dic = new Dictionary<string, object>();

                //过滤参数
                for (int i = 0; i < call.Args.Length;i++ )
                {
                    if (call.Args[i].ToString().Contains("123"))
                        call.Args[i] = call.Args[i].ToString().Replace("123", "123--");
                }
                //dic = actionContext.ActionArguments;
                //if (dic != null && dic.Count > 0)
                //{
                //    foreach (var m in dic)
                //    {
                //        string o = m.Value;//.ToJson();
                //        //  Utils.Filter(o);
                //    }
                //}

               
                System.IO.File.AppendAllText(System.Web.HttpContext.Current.Server.MapPath("~/1.txt"), string.Join(",", call.Args) + "=================");
                back = RemotingServices.ExecuteMessage(_target, call);
            }
            return back;
        }
    }



    //从ProxyAttribute继承，自动实现RealProxy植入
    [AttributeUsage(AttributeTargets.Class)]
    class SqlVerifyProxyAttribute : ProxyAttribute
    {
        //覆写CreateInstance函数，返回我们自建的代理
        public override MarshalByRefObject CreateInstance(Type serverType)
        {
            MarshalByRefObject obj = base.CreateInstance(serverType);
            SqlVerifyProxy proxy = new SqlVerifyProxy(serverType, obj);
            return (MarshalByRefObject)proxy.GetTransparentProxy();
        }
    }

    /// <summary>
    /// 业务代码,需要继承 ContextBoundObject ，凡是调用 Test方法下的方法都会AOP
    /// </summary>
    [SqlVerifyProxy]
    public class Test : ContextBoundObject 
    {

        public void say(string msg)
        { 
        
        }
    
    }

}

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using TestRealProxy;

namespace TestRealProxy2.Controllers
{
    
    [HandleError]
    public class HomeController : Controller
    {

        
        public ActionResult Index(string id)
        {
           //只要调用Test了类下的方法,都会过滤参数
            Test t = new Test();
            t.say(id);
            return View();
        }

        public ActionResult About()
        {
            return View();
        }
    }
}