我使用 ASP.NET Core 創建了一個示例 Web 應用程序來測試 cookie 的存儲和檢索。不幸的是，我無法存儲 cookie。我將首先請求一個 IndexA 操作來存儲 cookie。代碼運行時沒有任何錯誤，但是當我請求 IndexB 操作時。沒有找到指定的值這是 IndexA 操作：public IActionResult IndexA(){ Response.Cookies.Append("mykey", "myvalue", new CookieOptions() { Expires = DateTime.Now.AddMinutes(10) }); return View();}這是 IndexB 操作：public IActionResult IndexB(){ var cookie = Request.Cookies["mykey"]; return View();}這是啟動類：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?}"); }); }}
3 回答
慕的地6264312
TA貢獻1817條經驗 獲得超6個贊
我認為這可能與 ASP.NET Core 2.1 附帶的 GDPR 相關功能有關。我的理解是，它允許網站定義哪些 cookie 對瀏覽器來說是必不可少的，而那些非必需的則不會被發送。
我能想到的第一件事就是簡單地刪除對非必要 cookie 的同意檢查。不要在生產中這樣做，因為你可能會違反規定！. 改變：
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;
});
解決此問題的第二種可能方法是將您的 cookie 聲明為必不可少的，因此無論同意檢查結果如何，您的 cookie 都將被發送到瀏覽器。為此，請更改：
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
TA貢獻1864條經驗 獲得超2個贊
我正在使用 ASP.NET 核心 2.2。這是我在 ConfigureServices(IServiceCollection services) 中將 HttpContextAccessor 注入我的控制器的內容。
public void ConfigureServices(IServiceCollection services)
{
services.AddMvc();
//... some code
//services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
services.AddHttpContextAccessor();
}
這是我的控制器中的內容：
private readonly IHttpContextAccessor _httpContextAccessor;
public MySomethingController(IHttpContextAccessor httpContextAccessor)
{
//... some code
this._httpContextAccessor = httpContextAccessor;
}
下面是 Action 方法的代碼：
[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);
}
我能夠在另一個控制器中看到 cookie 值并將其傳遞給視圖。我在家庭控制器中有這個：
...
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
TA貢獻1851條經驗 獲得超3個贊
一個控制器暴露 HttpContext.Response.Cookies... 不需要通過 ConfigureServices 方法使用依賴注入，也不需要向控制器添加額外的屬性。只需調用 HttpContext.Response.Cookies.Append(...);
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