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如何使用ASP.NET Core 2.0存储和还原Cookie?

asp.net-core-2.0 asp.net-core cookies c#

Ahmad Javadi Nezhad · 技术社区 · 6 年前

我创建了一个带有ASP.NET核心的示例web应用程序来测试cookie的存储和检索。不幸的是,我不能储存饼干。

我读过这些问题来解答我的问题:

Cookies in ASP.NET Core rc2

Create cookie with ASP.NET Core

Cookies and ASP.NET Core

但不幸的是我没有找到一个好的答案。

这是索引操作:

public IActionResult IndexA()
{
   Response.Cookies.Append("mykey", "myvalue",
    new CookieOptions()
    {
        Expires = DateTime.Now.AddMinutes(10)
    });
  return View();
}

这是IndexB操作:

public IActionResult IndexB()
{
   var cookie = Request.Cookies["mykey"];
   return View();
}

这是启动类:

public class Startup
{
    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        services.Configure<CookiePolicyOptions>(options =>
        {
        // This lambda determines whether user consent for non-essential cookies is needed for a given request.
        options.CheckConsentNeeded = context => true;
            options.MinimumSameSitePolicy = SameSiteMode.None;
        });


        services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        else
        {
            app.UseExceptionHandler("/Home/Error");
        }

        app.UseStaticFiles();
        app.UseCookiePolicy();

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

2 回复 | 直到 6 年前

Mickaël Derriey 6 年前

我认为这可能与ASP.NET Core 2.1附带的GDPR相关特性有关。我的理解是,它允许网站定义哪些cookie对浏览器是必需的或不是必需的,而非必需的cookie不会被发送。

我能想到的第一件事就是简单地删除非必要cookies的同意检查。 不要在生产中这样做,因为你可能违反规定! . 更改:

services.Configure<CookiePolicyOptions>(options =>
{
    options.CheckConsentNeeded = context => true;
    options.MinimumSameSitePolicy = SameSiteMode.None;
});

到

services.Configure<CookiePolicyOptions>(options =>
{
    // No consent check needed here
    options.CheckConsentNeeded = context => false;
    options.MinimumSameSitePolicy = SameSiteMode.None;
});

第二种可能的解决方法是声明cookie是必需的,因此无论同意检查结果如何,cookie都将被发送到浏览器。为此,请更改:

Response.Cookies.Append(
  "mykey",
  "myvalue",
  new CookieOptions()
  {
      Expires = DateTime.Now.AddMinutes(10)
  });

具有

Response.Cookies.Append(
  "mykey",
  "myvalue",
  new CookieOptions()
  {
      Expires = DateTime.Now.AddMinutes(10),
      // Marking the cookie as essential
      IsEssential = true
  });

Mario Levesque 6 年前

我正在使用ASP.NET core 2.2。以下是我的ConfigureServices(IServiceCollection服务)中的内容,用于将HttpContextAccessor注入控制器。

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc();
        //... some code
        //services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
        services.AddHttpContextAccessor();
    }

    private readonly IHttpContextAccessor _httpContextAccessor;

    public MySomethingController(IHttpContextAccessor httpContextAccessor)
    {
        //... some code
        this._httpContextAccessor = httpContextAccessor;
    }

下面是Action方法的代码:

[HttpGet]
    public IActionResult SomethingToDo()
    {
        //... some code for my controller

        //Section for handling cookies
        //set the key value in Cookie  
        SetCookie("MyOwnKey", "Hello World from cookie", 15.0);

        //read cookie from IHttpContextAccessor 
        string cookieValueFromContext = _httpContextAccessor.HttpContext.Request.Cookies["MyOwnKey"];
        //or 
        string cookieValueFromRequest = GetCookie("MyOwnKey");

        //Delete the cookie object  
        //RemoveCookie("MyOwnKey");

        ViewData["CookieFromContext"] = cookieValueFromContext;
        ViewData["CookieFromRequest"] = cookieValueFromRequest;

        return View();
    }

然后我有以下方法:

    public string GetCookie(string key)
    {
        return Request.Cookies[key];
    }

    public void SetCookie(string key, string value, double? expireTime)
    {
        CookieOptions option = new CookieOptions();
        if (expireTime.HasValue)
            option.Expires = DateTime.Now.AddMinutes(expireTime.Value);
        else
            option.Expires = DateTime.Now.AddMilliseconds(1);
        Response.Cookies.Append(key, value, option);
    }

    public void RemoveCookie(string key)
    {
        Response.Cookies.Delete(key);
    }

我可以在另一个控制器中看到cookie值并将其传递给视图。

...
    private readonly IHttpContextAccessor _httpContextAccessor;
    private readonly IHostingEnvironment _hostingEnvironment;


    public HomeController(IHostingEnvironment hostingEnvironment, IHttpContextAccessor httpContextAccessor)
    {
        this._hostingEnvironment = hostingEnvironment;
        this._httpContextAccessor = httpContextAccessor;
    }

    public IActionResult Index()
    {
        //read cookie from IHttpContextAccessor 
        string cookieValueFromContext = _httpContextAccessor.HttpContext.Request.Cookies["MyOwnKey"];
        ViewData["CookieFromContext"] = cookieValueFromContext;

        return View();
    }

祝你好运