using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

/// 

/// myhandler 的摘要说明
/// 
public class myhandler:IHttpHandler
{

    public void ProcessRequest(HttpContext context)
    {
        string FileName = context.Server.MapPath(context.Request.FilePath);

        string host = context.Request.UrlReferrer.Host;

        if (context.Request.UrlReferrer.Host == null)
        {
            context.Response.ContentType = "image/JPEG";
            context.Response.WriteFile("~/error.gif");//被替换图片
        }
        else
        {

            if (host.IndexOf("xh100.com") > -1 || host.IndexOf("baidu.com") > -1 || host.IndexOf("bing.com") > -1 || host.IndexOf("google.com") > -1 || host.IndexOf("sogou.com") > -1 || host.IndexOf("360.cn") > -1)//这里是你的域名
            {
                context.Response.ContentType = "image/JPEG";
                context.Response.WriteFile(FileName);
            }
            else
            {
                context.Response.ContentType = "image/JPEG";
                context.Response.WriteFile("~/error.gif");
            }
        }
    }

    public bool IsReusable
    {
        get { return true; }
    }



	public myhandler()
	{
		//
		// TODO: 在此处添加构造函数逻辑
		//
	}
}