如何使.NET CORE中的静态文件仅对授权用户可用？

Question

<img src="~/static/img1.jpg" />

我使用this article启用了静态文件，但是这些代码不起作用。

[Authorize]
public IActionResult BannerImage()
{
     var file = Path.Combine(Directory.GetCurrentDirectory(), 
                        "MyStaticFiles", "images", "banner1.svg");

      return PhysicalFile(file, "image/svg+xml");
 }

another article也无济于事。 但是我不知道如何仅将图像提供给授权用户？

更新

我添加了将WWWROOT配置为静态目录以设置缓存头的信息

 app.UseStaticFiles(new StaticFileOptions
 {
    FileProvider = new PhysicalFileProvider(
    Path.Combine(Directory.GetCurrentDirectory(), "WWWROOT"))
 });
 app.UseStaticFiles(new StaticFileOptions
    {
        FileProvider = new PhysicalFileProvider(
Path.Combine(Directory.GetCurrentDirectory(), "MyStaticFiles")),
        OnPrepareResponse = x =>
        {
            if (x.Context.User.Identity.IsAuthenticated)
            {
                return;
            }

            x.Context.Response.StatusCode = (int) HttpStatusCode.Unauthorized;
        }
    });

然后授权停止工作。

Answer 1

只需这样做

    public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {
        app.UseStaticFiles(new StaticFileOptions
        {
            OnPrepareResponse = x =>
            {
                if (x.Context.User.Identity.IsAuthenticated)
                {
                    return;
                }

                x.Context.Response.StatusCode = (int) HttpStatusCode.Unauthorized;
            }
        });
        app.UseDefaultFiles();
    }