.netcore3.1 获取请求头header中认证信息并调用其它接口

　　如调用某一系统token信息

• controller获取token信息方法

 [HttpPost("UpdatA")]
        [AllowAnonymous]
        public async Task<WebApiResult> UpdateA([FromBody] XXRequest request)
        {
            string _auth = HttpContext.Request.Headers["Authorization"];
         
         ...
        }

• 在service调用时，使用token

   private readonly HttpClient _httpclient;
   public   XXProxy(HttpClient httpClient
            )
        {
            _httpclient = httpClient;
        
       
        }

  public async Task<WebApiResult> UpdateA(Demo request, string token)
        {
            _httpclient.DefaultRequestHeaders.Add("Authorization", token);
            HttpContent postContent = new StringContent(JsonConvert.SerializeObject(request));
            postContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json");
   ...

    }