.net使用httpHandler添加图片防盗链

.net使用httpHandler添加图片防盗链
1. 配置web.config:

  <!--图片添加水印的配置-->

                <httpHandlers>

                        <add verb="*" path="*.jpg" type="LinkHandler" />

                </httpHandlers>

  <!--图片添加水印的配置结束-->

2. OutLinkHandler.cs:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Drawing;

using System.IO;

/// <summary>

///HttpHandler 实现防盗链效果

/// </summary>

public class LinkHandler:IHttpHandler

{

    public LinkHandler() { }

            //1. 设置不能允许重用

            public bool IsReusable

            {

                get { return false; }

            }

            //2. 编写最终处理程序

            public void ProcessRequest(HttpContext context)

            {

                //context.Request.UrlReferrer.Host   //主机名

                //context.Request.Url.Port  //端口号

 <wbr>  <wbr>  <wbr>  <wbr>  <wbr>  <wbr>  <wbr>  <wbr> //context.Request.UrlReferrer.Authority   <wbr>//服务器端IP

                //根据Ip地址和端口号判断

                if (context.Request.UrlReferrer.Authority == "192.168.123.184" &&

                context.Request.UrlReferrer.Port == context.Request.Url.Port)

                    {

                            context.Response.ContentType="image/jpeg";

                            context.Response.WriteFile(context.Request.PhysicalPath);

                    }

                else

                    {

                    context.Response.ContentType="image/jpeg";

                    context.Response.WriteFile(context.Request.PhysicalApplicationPath+"images/1/LinkError.jpg");

                    }

            }

}