ASP.net 使用HttpHandler實現圖片防盜鏈

首先是HttpHandler類的代碼：

using System;using System.Collections.Generic;using System.Web;namespace HttpHandler{    public class JPEGHandler : IHttpHandler    {        #region IHttpHandler 成員     public bool IsReusable        {            get { return true; }        }        public void ProcessRequest(HttpContext context)        {            string fileName = context.Request.FilePath;            if (context.Request.UrlReferrer.Host == null)            {                context.Response.ContentType = "image/JPEG";                context.Response.WriteFile("/no.jpg");            }            else            {                if (context.Request.UrlReferrer.Host.IndexOf("localhost") >= 0)                {                    context.Response.ContentType = "image/JPEG";                    context.Response.WriteFile(fileName);                }                else                {                    context.Response.ContentType = "image/JPEG";                    context.Response.WriteFile("/no.jpg");                }            }        }        #endregion    }}

然後是web.config中的代碼：

<configuration><system.web><httpHandlers><add verb="*" path="*.jpg" type="HttpHandler.JPEGHandler"/></httpHandlers></configuration>

最後就是在網站根目錄下放入no.jpg就可以了。