HttpClient 调用外部接口（简单实用）

        /// <summary>
        /// 调用外部接口
        /// </summary>
        /// <param name="request">消息体</param>
        /// <returns></returns>
        public static string CallExternalInterface(string request)
        {
            //若传输的消息体是集合或者单个实体都可以转为json字符串来进行传输
            string result = null;
            string requestUrl = "http://127.0.0.1:xxxxx";//模拟请求的url
            //HttpClientHandler跳过SSL验证
            HttpClientHandler httpClientHanlder = new HttpClientHandler() { ServerCertificateCustomValidationCallback = (message, cert, chain, error) => true };
            using (var httpClient = new HttpClient(httpClientHanlder))
            {
                httpClient.Timeout = new TimeSpan(1, 0, 0, 0, 0);
                httpClient.DefaultRequestHeaders.Add("ContentType", "application/json");
                httpClient.DefaultRequestHeaders.Add("Accept", "*/*");
                HttpContent httpContent = new StringContent(request);
                httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
                //post请求
                var response = httpClient.PostAsync(requestUrl, httpContent).GetAwaiter().GetResult();
                if (response.IsSuccessStatusCode)
                {
                    //解析响应体 响应消息
                    result = response.Content.ReadAsStringAsync().Result;
                }
                else
                {
                    result = response.ToString();
                }
            }
            return result;
        }