asp.net 實現防迅雷等下載工具盜鏈

主要代碼如下：

public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "application/octet-stream";
            HttpRequest req = context.Request;
            string filename = req.Url.AbsolutePath;
            string userid = string.Empty;
            if (HttpContext.Current.Request.Cookies != null && HttpContext.Current.Request.Cookies["userid"] != null)
            {
                userid = HttpContext.Current.Request.Cookies["userid"].Value;
            }
            if (userid == "1")
            {
                string uuu = context.Server.MapPath(filename);
               
                context.Response.TransmitFile(uuu);
            }
            else
            {
                string u2 = context.Server.MapPath("default.rar");
                context.Response.WriteFile(u2);
            }
        }

 

設計思想如下：

1.      利用IHttpHandler接口來監聽對本網站的資源請求後綴名是否是我們要阻止的文件，如果是再判斷是否有下載權限。沒有就給它返回一個默認的無用的文件。