无法初始化身份 cookie答案

【问题标题】：Cannot initialize Identity cookies无法初始化身份 cookie
【发布时间】：2017-07-24 17:09:39
【问题描述】：

我创建了一个 ASP.NET Core 网站，并且正在尝试设置身份验证。 FormsAuthentication 不见了，所以我想我必须使用 Identity。我制作了一个使用 HttpContext SignInAsync 事物的系统，但它说 cookie 未初始化。我尝试将 UseIdentity 和 AddIdentity 以及其他 10 项内容添加到 Startup.cs，但它说这些没有定义。我还尝试获取 Identy NuGet 包。

编辑：启动.cs：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using StarLegacy.Web.Code.Utils;
using System.IO;
using Microsoft.AspNetCore.Authentication.Cookies;

namespace StarLegacy.Web
{
    public class Startup
    {
        public Startup(IHostingEnvironment env)
        {
            var builder = new ConfigurationBuilder()
                .SetBasePath(env.ContentRootPath)
                .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
                .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
                .AddEnvironmentVariables();
            Configuration = builder.Build();
            try
            {
                DBUtils.Init();
            }
            catch (Exception exception)
            {
                File.WriteAllText("startuperror.txt", exception.ToString());
                Console.Error.WriteLine(exception);
            }
        }

        public IConfigurationRoot Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services) {
            services.AddAntiforgery();
            services.AddAuthorization();
            // Add framework services.
            services.AddMvc();
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
        {
            loggerFactory.AddConsole(Configuration.GetSection("Logging"));
            loggerFactory.AddDebug();

            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseBrowserLink();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
            }

            app.UseStaticFiles();

            app.UseCookieAuthentication();

            app.UseMvc(config =>
            {
                config.MapRoute(
                name: "Default",
                template: "{controller}/{action}/{id?}",
                defaults: new { controller = "Home", action = "Index" }
                );
            });
        }
    }
}

【问题讨论】：

之前是否添加了 app.UseCookieAuthentication()？
那也不存在：/
我建议使用没有 ASP.NET Core Identity 的 cookie 中间件，所以你应该添加 Microsoft.AspNetCore.Authentication.Cookies
谢谢，nuget 包使 UseCookieAuthentication 存在。但是，我仍然收到此错误： InvalidOperationException: No authentication handler is configured to handle the scheme: Cookie
Microsoft.AspNetCore.Authentication.Cookies 用于创建您自己的中间件，这是我强烈推荐的，它为您提供了更多的灵活性，请看一下：docs.microsoft.com/en-us/aspnet/core/security/authentication/… 另外请在问题中提供您的配置和启动功能代码。附言app.UseCookieAuthentication() 可以错过

标签： c# asp.net asp.net-mvc asp.net-core asp.net-identity

【解决方案1】：

将以下内容添加到您的 .csproj：

//身份验证包

<PackageReference Include="Microsoft.AspNetCore.Authentication" Version="1.1.2" />
<PackageReference Include="Microsoft.AspNetCore.Identity" Version="1.1.2" />

运行 cmd dotnet restore
将using语句：using Microsoft.AspNetCore.Authorization;添加到Startup.cs
添加到Startup.cs方法public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)（你显然已经完成了第4步）：
```
    app.UseCookieAuthentication();
    app.UseMvc();
```

【讨论】：