.net core 学习小结之 Cookie-based认证

• 在startup中添加授权相关的管道

  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;
  
  namespace mvcforcookie
  {
      using Microsoft.AspNetCore.Authorization;
      using Microsoft.AspNetCore.Authentication.Cookies;
      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.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme).AddCookie(option => option.LoginPath = "/Acounnt/Index");
              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)
          {
              if (env.IsDevelopment())
              {
                  app.UseDeveloperExceptionPage();
              }
              else
              {
                  app.UseExceptionHandler("/Home/Error");
              }
              app.UseStaticFiles();
              app.UseAuthentication();
              app.UseMvc(routes =>
              {
                  routes.MapRoute(
                      name: "default",
                      template: "{controller=Home}/{action=Index}/{id?}");
              });
          }
      }
  }

• 将需要权限访问的页面贴上特性标签 
  [Authorize(Roles="Admin")] 表名只有Admin身份的人才能进入Admin控制器
• 用户成功输入用户名和密码之后生成用户票据

  using System;
  using System.Collections.Generic;
  using System.Diagnostics;
  using System.Linq;
  using System.Threading.Tasks;
  using Microsoft.AspNetCore.Mvc;
  using mvcforcookie.Models;
  
  namespace mvcforcookie.Controllers
  {
      using Microsoft.AspNetCore.Authorization;
      using Microsoft.AspNetCore.Authentication.Cookies;
      using Microsoft.AspNetCore.Authentication;
      using System.Security.Claims;
      public class AcounntController : Controller
      {
          public IActionResult Index()
          {
              //数据库查询用户输入的用户名和密码等一系列匹配操作
              //模拟用户登录后的操作
              //创建一个用户身份
              var claims=new List<Claim>{
                  new Claim(ClaimTypes.Name,"cyao"),
                  new Claim(ClaimTypes.Role,"Admin")
              };
              var claimidentity=new ClaimsIdentity(claims,CookieAuthenticationDefaults.AuthenticationScheme);
              //向上下文容器中添加当前用户
              HttpContext.SignInAsync(CookieAuthenticationDefaults.AuthenticationScheme,new ClaimsPrincipal(claimidentity));
              return Ok();
          }
          public IActionResult LoginOut()
          {
              HttpContext.SignOutAsync(CookieAuthenticationDefaults.AuthenticationScheme);
              return Ok();
          }
      }
  }

• 如果要获取当前用户的身份和用户名的话

        ViewBag.User= User.Claims.Where(c =>c.Type==ClaimTypes.Name).First().Value;
        ViewBag.Type= User.Claims.Where(c =>c.Type==ClaimTypes.Role).First().Value;