work/Startup.cs

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using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using work.Models.Database;

namespace work
{
    public class Startup
    {
        // This method gets called by the runtime. Use this method to add services to the container.
        // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddCors(options => {
                options.AddPolicy("CorsPolicy", builder =>
                {
                    builder.SetIsOriginAllowed((x) => true)
                   .AllowAnyOrigin()
                   .AllowAnyHeader()
                   .AllowAnyMethod();
                });

            });
            //添加授权规则为cookie 当未登录时跳转到Login.html
            services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme).AddCookie(
                options => { options.LoginPath = new PathString("/Login.html"); } //设置登录页面为/Auth/Signin
            );

            //services.AddMvc();
            services.AddControllersWithViews();
            services.AddControllers();
            //添加数据库引用
            services.AddDbContext<newsContext>();

        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseRouting();

            app.UseCors("CorsPolicy");

            //启用身份验证，加上这句才能生效，
            //注意顺序，在 app.UseRouting();之后
            //开启认证中间件
            app.UseAuthentication();
            //开启授权中间件