一. 配置Web.config（需要IIS服务器已安装请求筛选模块）
<security>
<requestFiltering>
<fileExtensions>
<add fileExtension=".txt" allowed="false" />
<add fileExtension=".exe" allowed="false" />
</fileExtensions>
</requestFiltering>
</security>
二. 添加测试文件夹
三. Download 主代码
public class DownloadController : BaseController
{
[Authorize]
public ActionResult DownloadFile(string name)
{
if (string.IsNullOrEmpty(name))
{
return Json("File name is required, download failed!", JsonRequestBehavior.AllowGet);
}
string[] arr = name.Split('.');
if (arr.Length < 2)
{
return Json("File name format is wrong, download failed!", JsonRequestBehavior.AllowGet);
}
string path = Server.MapPath("/Downloads" + "/" + name);
if (System.IO.File.Exists(path) == false)
{
return Json("File is not exist, download failed!", JsonRequestBehavior.AllowGet);
}
return File(new FileStream(path, FileMode.Open), "application/octet-stream", name);
}
}
四、测试结果：
http://localhost:55215/download/downloadfile?name=test.txt 正常下载
