图片盗链 取得 访问者ip地址

图片盗链 获得 访问者ip地址

 public void ProcessRequest(HttpContext context)        {            //context.Response.ContentType = "text/html";//返回一个text的东西，也就是string            context.Response.ContentType = "image/JPEG";            string fullpath = HttpContext.Current.Server.MapPath("Hydrangeas.JPG");             using(System.Drawing.Bitmap bitmap  = new System.Drawing.Bitmap(fullpath))             {                 using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap))                 {                     if (context.Request.UrlReferrer == null)//直接访问图片，就是UrlReferrer == null                     {                         g.Clear(System.Drawing.Color.White);                         g.DrawString("禁止直接访问图片，请在页面中查看图片",new System.Drawing.Font("宋体",30),System.Drawing.Brushes.Red,0,0);                     }                     else if (context.Request.UrlReferrer.Host != "localhost")//如果访问图片的网址不是localhost，localhost可以变成具体网址                     {                         g.Clear(System.Drawing.Color.White);                         g.DrawString("不要盗链", new System.Drawing.Font("宋体", 30), System.Drawing.Brushes.Red, 0, 0);                     }                 } g.DrawString("你的ip地址是:"+context.Request.UserHostAddress, new System.Drawing.Font("宋体", 30), System.Drawing.Brushes.Red, 0, 0);//获得访问者的ip地址                 bitmap.Save(context.Response.OutputStream,System.Drawing.Imaging.ImageFormat.Jpeg);             }                   }