想要实现文件放盗链的功能
首先添加一个全局文件 Global.asax
在 Application_BeginRequest中我们可以判断Http报文头中的UrlReferre是否来源本站。
if (HttpContext.Current.Request.UrlReferrer != null)
{
if (HttpContext.Current.Request.Url.AbsolutePath.EndsWith("jpg", StringComparison.OrdinalIgnoreCase) && HttpContext.Current.Request.UrlReferrer.Host != "localhost")
{
HttpContext.Current.Response.WriteFile(HttpContext.Current.Server.MapPath("~/jzdl.jpg"));
HttpContext.Current.Response.End();
}
}
{
if (HttpContext.Current.Request.Url.AbsolutePath.EndsWith("jpg", StringComparison.OrdinalIgnoreCase) && HttpContext.Current.Request.UrlReferrer.Host != "localhost")
{
HttpContext.Current.Response.WriteFile(HttpContext.Current.Server.MapPath("~/jzdl.jpg"));
HttpContext.Current.Response.End();
}
}