using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Web;

namespace WebService
{
    public class HttpHelper
    {
        public static T Post<T>(string url, object parm, string rquestName = "") where T : class
        {
            HttpWebResponse response = null;
            StreamReader resultReader = null;
            string responseContent = string.Empty;
            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                request.Timeout = 30 * 1000;
                request.Method = "POST";
                request.ContentType = "application/json; charset=UTF-8";
                parm = parm ?? "";
                byte[] data = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(parm));
                request.ContentLength = data.Length;
                using (Stream newStream = request.GetRequestStream())
                {
                    newStream.Write(data, 0, data.Length);
                };

                response = (HttpWebResponse)request.GetResponse();
                Stream webStream = response.GetResponseStream();
                if (webStream == null)
                {
                    throw new Exception("Network error");
                }

                int statsCode = (int)response.StatusCode;
                resultReader = new StreamReader(webStream, Encoding.UTF8);
                responseContent = resultReader.ReadToEnd();

                if (response != null)
                    response.Close();
                if (resultReader != null)
                    resultReader.Close();

                if (statsCode != 200)
                {
                    throw new Exception("异常，响应码：" + statsCode.ToString());
                }

                //Logger.Write_Log("System/API请求", rquestName, "请求成功", new { 请求报文 = parm, 接收报文 = responseContent });
                return JsonConvert.DeserializeObject<T>(responseContent);
            }
            catch (Exception ex)
            {
                //Logger.Write_Log("System/API请求", rquestName, "请求异常", new { 请求报文 = parm, 接收报文 = responseContent, 错误 = ex.Message });
                throw ex;
            }
        }
    }
}