利用IHttpModule、IHttpHandler做授权类

Global.asax中配置：

    void Application_Start(object sender, EventArgs e)
    {
        // Code that runs on application startup
        List<string> programList = new List<string>();
        programList.Add("WEBR1010");
        Application["ProgramList"] = programList;
    }

 

1.利用IHttpModule

 

using System;
using System.Web;
using System.Collections.Generic;

namespace WintonAuthorization
{
    /// <summary>
    /// HttpModule授权类
    /// </summary>
    public class AuthModule :IHttpModule
    {
        /// <summary>
        /// 初始化
        /// </summary>
        /// <param name="application"></param>
        public void Init(HttpApplication application)
        {
            application.BeginRequest += (new EventHandler(this.Application_BeginRequest));
            //application.EndRequest += (new EventHandler(this.Application_EndRequest));
        }

        /// <summary>
        /// 文件请求开始判断
        /// </summary>
        /// <param name="source"></param>
        /// <param name="e"></param>
        private void Application_BeginRequest(Object source, EventArgs e)
        {
            HttpApplication application = (HttpApplication)source;
            HttpRequest reqest = application.Context.Request;
            
            //url请求
            string fileName = string.Empty;
            string urlStr = reqest.Url.AbsolutePath;
            if (!string.IsNullOrEmpty(urlStr))
            {
                string[] urlArray = urlStr.Split('/');
                fileName = urlArray[urlArray.Length - 1].ToUpper().Replace(".ASPX","");
            }

            //大等于8位的才符合條件
            if (!string.IsNullOrEmpty(fileName) && fileName.Length >= 8)
            {
                 //取前8位
                 fileName = fileName.Substring(0, 8);

                //是否是符合要求的程式
                 bool isOKProgram = false;

                //符合：前3位等于'WEB',第4位為字母,后4位為數字的才需要判斷
                 if ("WEB" == fileName.Substring(0, 3))
                 {
                     if (char.IsLetter(fileName[3]))
                     {
                         if (char.IsDigit(fileName[4]) && char.IsDigit(fileName[5]) && char.IsDigit(fileName[6]) && char.IsDigit(fileName[7]))
                         {
                             isOKProgram = true;
                         }
                     }
                 }

                 if (isOKProgram)
                 {
                     //是否存在文件
                     List<string> programList = application.Context.Application["ProgramList"] as List<string>;
                     if (null != programList && 0 < programList.Count && programList.Contains(fileName))
                     {
                     }
                     else
                     {
                         HttpResponse Response = application.Context.Response;
                         Response.Write("<script >alert('該程式沒有授權！');history.back();</script>");
                     }
                 }
            }
        }

        /// <summary>
        /// 請求結束
        /// </summary>
        /// <param name="source"></param>
        /// <param name="e"></param>
        private void Application_EndRequest(Object source, EventArgs e)
        {
        }

        /// <summary>
        /// 釋放
        /// </summary>
        public void Dispose()
        {

        }   

    }
}

Web.config中 配置：

<httpModules>
      <add name="Auth" type="WintonAuthorization.AuthModule,WintonAuthorization" />
</httpModules>

 

2.利用IHttpHandler

 

using System;
using System.Collections.Generic;
using System.Web;

namespace WintonAuthorization
{
    /// <summary>
    /// 重現實現IHttpHandler
    /// </summary>
    public class AuthHandler:IHttpHandler
    {
        #region IHttpHandler Members

        public bool IsReusable
        {
            get { return false; }
        }

        public void ProcessRequest(HttpContext context)
        {
            HttpRequest reqest = context.Request;

            //url请求
            string fileName = string.Empty;
            string urlStr = reqest.Url.AbsolutePath;
            if (!string.IsNullOrEmpty(urlStr))
            {
                string[] urlArray = urlStr.Split('/');
                fileName = urlArray[urlArray.Length - 1].ToUpper().Replace(".ASPX", "");
                //取前8位
                if (fileName.Length >= 8)
                {
                    fileName = fileName.Substring(0, 8);
                }
            }

            //是否存在文件
            List<string> programList = context.Application["ProgramList"] as List<string>;
            if (!string.IsNullOrEmpty(fileName) && null != programList && 0 < programList.Count && programList.Contains(fileName))
            {
            }
            else
            {
                HttpResponse Response = context.Response;
                Response.Write("<script >alert('該程式沒有授權！');history.back();</script>");
            }
        }

        #endregion
    }
}

Web.config中 配置：

  <httpHandlers>
      <add verb="*" path="*.aspx" type="WintonAuthorization.AuthHandler, WintonAuthorization" />
       </httpHandlers>