C# 后台POST数据及API接收简记

　　　　背景：项目对接各种卡壳，本地测试处理效果，暂记。

　　　　开发环境：VS 2019 16.4 +NetCore 3.1.1+CoreMVC

　　　　接口为WebApi（Core）

　　　　一、后台请求第三方接口（模拟）

       //参数序列化后直接写入
　　　　 public string Posts(string postData, string url)
        {
            try
            {
                System.Net.ServicePointManager.DefaultConnectionLimit = 50;

                var postRequest = HttpWebRequest.Create(url) as HttpWebRequest;
                postRequest.KeepAlive = false;
                postRequest.Timeout = 5000;
                postRequest.Method = "POST";
                postRequest.ContentType = "application/json;";
                postRequest.ContentLength = postData.Length;
                postRequest.AllowWriteStreamBuffering = false;
                StreamWriter writer = new StreamWriter(postRequest.GetRequestStream(), Encoding.ASCII);
                writer.Write(postData);
                writer.Flush();

                HttpWebResponse response = postRequest.GetResponse() as HttpWebResponse;
                Stream responseStream = response.GetResponseStream();
                using (System.IO.StreamReader reader = new StreamReader(responseStream, Encoding.GetEncoding("UTF-8")))
                {
                    string jsonStr = reader.ReadToEnd();
                    return jsonStr;
                }

            }
            catch (Exception ex)
            {
                _logger.LogInformation("post Error!=" + ex);
            }
            return "";
        }


 　　　　/// 

        /// 内容转换为流写入post
        /// 
        /// 
        /// 
        /// 
        /// 
        public static string PostMoths(string url, string param, Dictionary<string, string> dicHeider = null)
        {
            Encoding encod = Encoding.UTF8;
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "POST";
            request.Accept = "text/html,application/xhtml+xml,*/*";
            request.ContentType = "application/json";
            if (dicHeider != null)
            {
                foreach (KeyValuePair<string, string> item in dicHeider)
                {
                    request.Headers.Add(item.Key, item.Value);
                }
            }
            byte[] buffer = encod.GetBytes(param);
            request.ContentLength = buffer.Length;
            request.GetRequestStream().Write(buffer, 0, buffer.Length);

            using StreamReader reader = new StreamReader(((HttpWebResponse)request.GetResponse()).GetResponseStream(), Encoding.UTF8);
            return reader.ReadToEnd();
        }

　　二、接收方：#测试接收　　　　

 [HttpPost]
        [Route("GetAJWSWJ")]
        public async Task GetAJWSWJ(dynamic jsondata)
        {
　　　　　　　　 try
                {
                    var param = JsonConvert.DeserializeObject(jsondata.ToString());
                    var strParam = param["wsslbh"].ToString();
                    _logger.LogInformation($"接收参数解析!strParam={strParam}");
                    var paramsStr = new { wsslbh = strParam };
                    _logger.LogInformation($"传递参数!strParam={paramsStr}");
                    //var valssss = this.Posts(JsonConvert.SerializeObject(paramsStr), text3);
                    var valssss = this.PostMoths(text3, JsonConvert.SerializeObject(paramsStr));
                    await BodyReturn(JsonConvert.SerializeObject(valssss));
                }
                catch (Exception ex)
                {
                    _logger.LogInformation($"PostMoths Error!" + ex.Message);
                    await BodyReturn(ex.Message);
                }
　　　　　}