.net学习图片防盗链

代码实现如下

using System;using System.Collections.Generic;using System.Linq;using System.Web;/// <summary>///全局处理程序///1、新建类，实现IHttpHandler///2、实现相应的功能///3、配置web.config <httpHandlers>      <!-- type="命名空间.类名,程序集的名字"-->      <add verb="*"《请求类型 get post》 path="img/*.jpg" 《那个路径下的图片》 type="DaoLian"《类名》/>    </httpHandlers>/// </summary>public class DaoLian:IHttpHandler{    public bool IsReusable    {        get { return false; }    }    public void ProcessRequest(HttpContext context)    {        context.Response.ContentType = "image/jpeg";        //当前请求        Uri u1 = context.Request.Url;        //上一次请求        Uri u2 = context.Request.UrlReferrer;        //比较域名和端口是否一致        if (CompareUrl(u1, u2))        {            //正常的请求            string path = context.Request.RawUrl;            path = context.Request.MapPath(path);            context.Response.WriteFile(path);        }        else        {             //盗链的请求            //相对路径 相对于浏览器当前请求的文件            string path = context.Request.MapPath("daolian.jpg");            context.Response.WriteFile(path);        }    }    //比较两个uri的域名和端口是否相等    bool CompareUrl(Uri u1, Uri u2)    {        return Uri.Compare(u1, u2, UriComponents.HostAndPort, UriFormat.SafeUnescaped, StringComparison.CurrentCultureIgnoreCase) == 0;    }}

转载于:https://www.cnblogs.com/eric-gms/p/3423559.html