#region IHttpHandler 成员 bool IHttpHandler.IsReusable { get { return true; } } void IHttpHandler.ProcessRequest(HttpContext context) { string FileName = context.Server.MapPath(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("mydomain.com") > 0) { context.Response.ContentType = "image/JPEG"; context.Response.WriteFile(FileName); } else { context.Response.ContentType = "image/JPEG"; context.Response.WriteFile("no/jpg"); } } } #endregion