如何在 ASP.Net Core 1.1 中使用 Response.Cookies.Append()？

Question

我正在尝试将全球化添加到 Intranet 应用程序，使用 cookie 允许用户选择文化。中间件已设置并运行，但我遇到了基于 UI 选择附加到 cookie 的问题。

该方法直接来自 Asp.Net Core 文档，如下所示：

public void ConfigureServices(IServiceCollection services)
{
    services.Configure<RequestLocalizationOptions>(
        options =>
        {
            var supportedCultures = new List<CultureInfo>
            {
            new CultureInfo("en-US"),
            new CultureInfo("en-GB"),
            new CultureInfo("fr-FR"),
            new CultureInfo("es-ES")
            };

            options.DefaultRequestCulture = new RequestCulture(culture: "en-GB", uiCulture: "en-GB");
            options.SupportedCultures = supportedCultures;
            options.SupportedUICultures = supportedCultures;
        });

    services.AddLocalization();
    services.AddMvc(config =>
    {
        var policy = new AuthorizationPolicyBuilder()
                         .RequireAuthenticatedUser()
                         .Build();
        config.Filters.Add(new AuthorizeFilter(policy));
    })
    .AddViewLocalization();

    services.AddSession(options => {
        options.CookieName = "Intranet";
    });
}

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
    var locOptions = app.ApplicationServices.GetService<IOptions<RequestLocalizationOptions>>();
    app.UseRequestLocalization(locOptions.Value);

    app.UseSession();
    app.UseMvc(routes =>
    {
        routes.MapRoute(
            name: "default",
            template: "{controller=Home}/{action=Index}/{id?}");
    });
}

[HttpPost]
 public IActionResult SetLanguage(string culture, string returnUrl)
  {
    Response.Cookies.Append(
      CookieRequestCultureProvider.DefaultCookieName,
      CookieRequestCultureProvider.MakeCookieValue(new RequestCulture(culture)),
        new CookieOptions { Expires = DateTimeOffset.UtcNow.AddYears(1) 
   });

   return LocalRedirect(returnUrl);
 }

问题是：

1. 响应不存在
2. Lo​​calRedirect 不存在

我试过了：

1. HttpResponse、HttpRequest
2. Lo​​calRedirectResult

Answer 1

首先你必须使用CookieRequestCultureProvider。稍后，您在示例中的操作应该可以正常工作。 我还要补充一点：

CultureInfo.CurrentCulture = culture;
CultureInfo.CurrentUICulture = culture;

这是我的配置：

public void ConfigureServices(IServiceCollection services)
{
    services.AddLocalization(opts => { opts.ResourcesPath = "Resources"; });

    services.AddMvc()
        .AddViewLocalization(
            Microsoft.AspNetCore.Mvc.Razor.LanguageViewLocationExpanderFormat.SubFolder,
            opts => { opts.ResourcesPath = "Resources"; }
        )
        .AddDataAnnotationsLocalization();

    services.Configure<RequestLocalizationOptions>(opts =>
    {
        var supportedCultures = new[]
        {
            new CultureInfo("en-US"), 
            ...               
        };
        opts.DefaultRequestCulture = new Microsoft.AspNetCore.Localization.RequestCulture("en-US");
        opts.SupportedCultures = supportedCultures;
        opts.SupportedUICultures = supportedCultures;
    });
}

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
    app.UseRequestLocalization();

    app.UseMvc(routes =>
    {
        routes.MapRoute(name: "default", template: "{controller=Home}/{action=Index}");
    });
}

Answer 2

从您获得该示例的文档中，您可以看到代码来自 GitHub，其中包含许多示例项目。这个特定的样本来自Localization.StarterWeb。

您的两个“缺失”方法实际上是 ControllerBase 的一部分（这是 Controller 继承自的。因此，如果您将此操作方法放入控制器中，它将起作用。

public class HomeController : Controller
{
    [HttpPost]
    public IActionResult SetLanguage(string culture, string returnUrl)
    {
        Response.Cookies.Append(
            CookieRequestCultureProvider.DefaultCookieName,
            CookieRequestCultureProvider.MakeCookieValue(new RequestCulture(culture)),
            new CookieOptions { Expires = DateTimeOffset.UtcNow.AddYears(1) }
        );

        return LocalRedirect(returnUrl);
    }
}

Answer 3

在 ASP .NET Core 2.1+ 中，如果您通过在 Startup.cs 中调用 app.UseCookiePolicy() 来使用 cookie 策略功能来实现 GDPR，请确保将您的 cookie 标记为必需，否则它不会发送给尚未接受您的政策。

Response.Cookies.Append(
            CookieRequestCultureProvider.DefaultCookieName,
            CookieRequestCultureProvider.MakeCookieValue(new RequestCulture(culture)),
            new CookieOptions 
            { 
                Expires = DateTimeOffset.UtcNow.AddYears(1), 
                IsEssential = true 
            }
        );

显然，您还应该在隐私声明中提及 cookie。