using Microsoft.AspNetCore.Builder;

using Microsoft.AspNetCore.Http;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Net;

using System.Text;

using System.Threading.Tasks;

namespace WebAuthorize

{

    public static class AuthorizeExtensio

    {

        public static void AddAuthorize(this IApplicationBuilder applicationBuilder)

        {

            applicationBuilder.Use(async (currentContext, nextContext) =>

            {

                if (currentContext.Request.Headers.ContainsKey("Authorization"))

                {

                    var authorize = currentContext.Request.Headers["Authorization"].ToString();

                    if (authorize.Contains("Basic"))//如果是Basic 身份认证

                    {

                        var info = authorize.Replace("Basic ", string.Empty);

                        var bytes = Convert.FromBase64String(info);//反解析Basic 64

                        var contents = Encoding.Default.GetString(bytes);

                        var dd = contents.Split(":").ToArray();

                        var userName = dd[];//用户名

                        var userPwd = dd[];//密码

                        if (userName == "GeBiLaoWang" && userPwd == "")

                        {

                            await currentContext.Response.WriteAsync("验证通过").ConfigureAwait(true); //Response.WriteAsync() 需要引用 Microsoft.AspNetCore.Http;

                            await nextContext?.Invoke();

                            return;

                        }

                    }

                }

                currentContext.Response.StatusCode = (int)HttpStatusCode.Unauthorized;

                await currentContext.Response.WriteAsync("See tou tomorrow!").ConfigureAwait(true);

            });

        }

    }

}

            //添加服务

            app.AddAuthorize();

            app.Run(async (context) =>

            {

                await context.Response.WriteAsync("Hello World!").ConfigureAwait(true);

            });