如何使用 ASP.NET Core 2.0 存储和恢复 cookie？
我使用 ASP.NET Core 创建了一个示例 Web 应用程序来测试 cookie 的存储和检索。不幸的是，我无法存储 cookie。
我将首先请求一个 IndexA 操作来存储 cookie。代码运行时没有任何错误，但是当我请求 IndexB 操作时。没有找到指定的值
这是 IndexA 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?}");
});
}
}
慕哥92293983回答
-
慕的地6264312
我认为这可能与 ASP.NET Core 2.1 附带的 GDPR 相关功能有关。我的理解是，它允许网站定义哪些 cookie 对浏览器来说是必不可少的，而那些非必需的则不会被发送。我能想到的第一件事就是简单地删除对非必要 cookie 的同意检查。不要在生产中这样做，因为你可能会违反规定！. 改变：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;});解决此问题的第二种可能方法是将您的 cookie 声明为必不可少的，因此无论同意检查结果如何，您的 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) });和Response.Cookies.Append( "mykey", "myvalue", new CookieOptions() { Expires = DateTime.Now.AddMinutes(10), // Marking the cookie as essential IsEssential = true }); -
慕斯王
我正在使用 ASP.NET 核心 2.2。这是我在 ConfigureServices(IServiceCollection services) 中将 HttpContextAccessor 注入我的控制器的内容。 public void ConfigureServices(IServiceCollection services) { services.AddMvc(); //... some code //services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>(); services.AddHttpContextAccessor(); }这是我的控制器中的内容： 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); }我能够在另一个控制器中看到 cookie 值并将其传递给视图。我在家庭控制器中有这个：... 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(); } -
皈依舞
一个控制器暴露 HttpContext.Response.Cookies... 不需要通过 ConfigureServices 方法使用依赖注入，也不需要向控制器添加额外的属性。只需调用 HttpContext.Response.Cookies.Append(...);
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