<%@ WebHandler Language=C# Class=防盜鏈 %>
using Systemusing SystemWeb
public class 防盜鏈 IHttpHandler {
public void ProcessRequest （HttpContext context） { contextResponseContentType = image/JPEGstring fullpath = HttpContextCurrentServerMapPath（~/image/jpg）using （SystemDrawingBitmap bitmap = new SystemDrawingBitmap（fullpath））
{ using （SystemDrawingGraphics g = SystemDrawingGraphicsFromImage（bitmap））
{ if （contextRequestUrlReferrer == null）
{ gClear（SystemDrawingColorWhite）gDrawString（禁止提交圖片 new SystemDrawingFont（宋體 ） SystemDrawingBrushesRosyBrown ）} else if（context RequestUserHostAddress ！=localhost||context Request UserHostAddress ！=）
{ gClear（System Drawing Color White ）gDrawString（禁止盜鏈new SystemDrawingFont （宋體）System Drawing Brushes RosyBrown ）}
} bitmapSave（context Response OutputStream System Drawing Imaging ImageFormatGif ）}
public bool IsReusable { get { return false}
}
From:http://tw.wingwit.com/Article/program/net/201311/13520.html
