Startup.cs

using Microsoft.VisualBasic.CompilerServices;
using System.Collections.Specialized;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using NLog;
using NLog.Extensions.Logging;
using WEBAPI.Test;

namespace WEBAPI
{
    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)
        {
             //把Nlog注册到webapi
            LogManager.Configuration = new NLogLoggingConfiguration(Configuration.GetSection("NLog"));
            var logger = NLog.Web.NLogBuilder.ConfigureNLog(LogManager.Configuration).GetCurrentClassLogger();
            services.AddSingleton<Logger>(logger);

            services.AddSingleton<Util>();
            services.AddScoped<Dao>();

              //配置跨域策略
            var urls = Configuration["AppConfig:Cores"].Split(',');
            services.AddCors(
                options => options.AddPolicy("Domain",
                builder => builder.WithOrigins(urls)
                .AllowAnyMethod()
                .AllowAnyHeader()
                .AllowAnyOrigin()
                .AllowCredentials()));
            
            //Session
            services.Configure<CookiePolicyOptions>(options =>
            {
                options.CheckConsentNeeded = context => true;
                options.MinimumSameSitePolicy = Microsoft.AspNetCore.Http.SameSiteMode.None;
            });
            //启用内存缓存(该步骤需在AddSession()调用前使用)
            services.AddDistributedMemoryCache();//启用session之前必须先添加内存
            services.AddSession(options =>
            {
                options.Cookie.Name = ".AdventureWorks.Session";
                options.IdleTimeout = TimeSpan.FromSeconds(2000);//设置session的过期时间
                options.Cookie.HttpOnly = true;//设置在浏览器不能通过js获得该cookie的值
            });

            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
           
        }

        // 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
            {
                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
                app.UseHsts();
            }

            app.UseHttpsRedirection();
            app.UseCors("Domain");
            app.UseSession();
            app.UseMvc();
        }
    }
}