.Net Core 3.0 Api json web token 中间件签权验证和 Cors 中间件处理跨域请求

第一步：在Nuget上安装"Microsoft.AspNet.WebApi.Cors"包，并对api controller使用[EnableCors]特性以及Microsoft.AspNetCore.Authentication.JwtBearer包

第二步：创建.netcore API项目 /控制器：AuthenticateController

 

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using Microsoft.AspNetCore.Authorization; using Microsoft.AspNetCore.Cors; using Microsoft.AspNetCore.Mvc; using Microsoft.Extensions.Options; using Microsoft.IdentityModel.Tokens; using static JSON_WEB_Token.Helper; namespace JSON_WEB_Token.Controllers { //跨域标签
    [EnableCors("anyPolicy")] //API接口打上Authorize标签
 [Authorize] [ApiController] //路由配置
    [Route("api/[controller]/[action]")] public class AuthenticateController : ControllerBase { private JwtSettingsModel _jwtSettings; public AuthenticateController(IOptions<JwtSettingsModel> jwtSetting) { _jwtSettings = jwtSetting.Value; } [HttpPost] public IActionResult Token([FromBody]PasswordModel request) { var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_jwtSettings.SecetKey)); string userId = request.UserName == null ? request.UserName : request.UserNo; if (request.UserName != "test" && request.PassWord != "123" ) { return BadRequest(); } 

            var tokenModel = Helper.GetAccessTokenModel (new UserData() { UserGid = strUserGid, UserNo = "test" }, 24 * 365 ); return Ok(tokenModel); } } public class PasswordModel { public string UserName { get; set; } public string PassWord { get; set; } public string UserNo { get; set; } public string ClientSecret { get; set; } } }

 

 

 

第三步： Helper

using Microsoft.Extensions.Configuration; using Microsoft.IdentityModel.Tokens; using System; using System.Collections.Generic; using System.ComponentModel.DataAnnotations; using System.IdentityModel.Tokens.Jwt; using System.IO; using System.Linq; using System.Security.Claims; using System.Text; using System.Threading.Tasks; namespace JSON_WEB_Token { public  class Helper { public  static AccessTokenResponse GetAccessTokenModel(UserData userData, int hours = 24, DateTime? expireTimeSpan = null) { JwtSettingsModel _jwtSettings = GetAppsettings<JwtSettingsModel>("JwtSettings"); //创建claim
            var claim = new Claim[]{ new Claim(ClaimTypes.Sid,userData.UserGid.ToString()), new Claim(ClaimTypes.Name,userData.UserNo), new Claim(ClaimTypes.Role,TokenRoleType.UserApp), 
 }; //对称秘钥 签名秘钥
            var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_jwtSettings.SecetKey)); //签名证书(秘钥，加密算法)
            var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha256); //生成token
            DateTime expiresDate = expireTimeSpan ?? System.DateTime.Now.AddHours(hours); var token = new JwtSecurityToken(_jwtSettings.Issuer, _jwtSettings.Audience, claim, DateTime.Now, expiresDate, creds); //保存token
            var accessTokenModel = new AccessTokenResponse(); accessTokenModel.TokenType = "Bearer"; accessTokenModel.UserNo = userData.UserNo; accessTokenModel.ExpiresDate = DateTimeToTimestamp(expiresDate); accessTokenModel.AccessToken = new JwtSecurityTokenHandler().WriteToken(token); return accessTokenModel; } public  static long DateTimeToTimestamp(DateTime dateTime) { var start = new DateTime(1970, 1, 1, 0, 0, 0, dateTime.Kind); return Convert.ToInt64((dateTime - start).TotalSeconds); } public class UserData { public Guid UserGid { get; set; } public string UserNo { get; set; } [Required] public string UserName { get; set; } public string PassWord { get; set; } } public class AccessTokenResponse { public string TokenType { get; set; } = "Bearer"; public string UserNo { get; set; } public string AccessToken { get; set; } public long ExpiresDate { get; set; }  } /// <summary>
        /// 获取配置文件信息 /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="setKey"></param>
        /// <returns></returns>
        public static T GetAppsettings<T>(string setKey) { var builder = new Microsoft.Extensions.Configuration.ConfigurationBuilder() .SetBasePath(Directory.GetCurrentDirectory()) .AddJsonFile("appsettings.json").Build(); return builder.GetSection(setKey).Get<T>(); } /// <summary>
        /// Token用户类型 /// </summary>
        public class TokenRoleType { /// <summary>
            /// 匿名Token /// </summary>
            public const string GuoWaiApp = "国外渠道"; /// <summary>
            /// 用户Token /// </summary>
            public const string UserApp = "国内渠道"; } } }

第四：JwtSettingsModel

using System; using System.Collections.Generic; using System.Linq; using System.Threading.Tasks; namespace JSON_WEB_Token { public class JwtSettingsModel { //token是谁颁发的
        public string Issuer { get; set; } //token可以给哪些客户端使用
        public string Audience { get; set; } //加密的key 必须是16个字符以上，要大于128个字节
        public string SecetKey { get; set; } } public class AccessTokenErrModel { public string AppId { get; set; } public string errcode { get; set; } public string errmsg { get; set; } public Guid UserGid { get; set; } } }

第五：appsettings

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },

  "AllowedHosts": "*",

  "JwtSettings": {
    "Issuer": "http://localhost:44305",
    "Audience": "http://localhost:44305",
    "SecetKey": "HelloWorldHelloWorldHelloWorld"
  }
}

第六：Startup

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using Microsoft.AspNetCore.Authentication.JwtBearer; 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.Hosting; using Microsoft.Extensions.Logging; using Microsoft.IdentityModel.Tokens; namespace JSON_WEB_Token { 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.AddControllers(); #region json  web   token  添加认证服务
            //将appsettings.json中的JwtSettings部分文件读取到JwtSettings中
            services.Configure<JwtSettingsModel>(Configuration.GetSection("JwtSettings")); //使用Bind的方式读取配置 //将配置绑定到JwtSettings实例中
            var jwtSettings = new JwtSettingsModel(); Configuration.Bind("JwtSettings", jwtSettings); services.AddAuthentication(options => { //认证middleware配置
                options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme; options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme; options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme; }).AddJwtBearer(options => { //options.SaveToken = true; //options.RequireHttpsMetadata = false; //主要是jwt token参数设置
                options.TokenValidationParameters = new TokenValidationParameters { //Token颁发机构
                    ValidIssuer = jwtSettings.Issuer, //颁发给谁
                    ValidAudience = jwtSettings.Audience, //这里的key要进行加密
                    IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(jwtSettings.SecetKey)) }; }); #endregion

            #region 注册跨域请求服务 CORS 中间件处理跨域请求
            //注册跨域请求服务 允许所有来源、所有方法、所有请求标头、允许请求凭据
            services.AddCors(options => { //注册默认策略
                        options.AddDefaultPolicy( builder => { builder.AllowAnyOrigin() .AllowAnyMethod() .AllowAnyHeader() // .AllowCredentials()
 ; }); //注册一个策略名称
                        options.AddPolicy("anyPolicy", builder => { builder.WithOrigins("http://127.0.0.1:9102", "https://www.baidu.com") .AllowAnyMethod() .AllowAnyHeader() // .AllowCredentials()
 ; }); }); services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_3_0); #endregion } // 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(); } else { app.UseExceptionHandler("/Home/Error"); } app.UseHttpsRedirection(); /////////////////////////////////////////////             //授权（Authorization）
 app.UseAuthorization(); ///添加中间件（Middleware） 启用验证
 app.UseAuthentication(); /////////////////////////////////////////////////
            app.UseCors("anyPolicy"); // 设置全局跨域
 app.UseRouting(); app.UseEndpoints(endpoints => { endpoints.MapControllers(); endpoints.MapControllerRoute( name: "default", pattern: "{controller=Authenticate}/{action=Index}/{id?}"); }); } } }

 第七：postman请求