using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Security;
using System.Net;
using System.Security.Cryptography.X509Certificates;
using System.Text;

namespace SAL_OUTSTOCK.Utils
{
    public static class HttpWebHelper
    {
        /// <summary>
        /// post请求
        /// </summary>
        /// <param name="url">请求地址</param>
        /// <param name="postData">请求数据</param>
        /// <param name="certificate2">证书</param>
        /// <returns></returns>
        public static string DoPost(string url, string postData, X509Certificate2 certificate2)
        {
            try
            {
                string result = string.Empty;

                HttpWebRequest request = null;
                if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
                {
                    request = WebRequest.Create(url) as HttpWebRequest;
                    ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
                    request.ProtocolVersion = HttpVersion.Version11;
                    // 这里设置了协议类型。
                    ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;// SecurityProtocolType.Tls1.2; 
                    request.KeepAlive = false;
                    ServicePointManager.CheckCertificateRevocationList = true;
                    ServicePointManager.DefaultConnectionLimit = 100;
                    ServicePointManager.Expect100Continue = false;
                }
                else
                {
                    request = (HttpWebRequest)WebRequest.Create(url);
                }

                //string baseDirectory = AppDomain.CurrentDomain.BaseDirectory;

                ////证书
                //var keystorefile = baseDirectory + @"\bin\ISSUE\testISSUE.pfx";
                //var key = "123456";
                //var cer = new X509Certificate2(keystorefile, key);

                if (certificate2 != null)
                    request.ClientCertificates.Add(certificate2);

                request.Method = "POST";    //使用get方式发送数据
                request.ContentType = "application/json;charset=utf-8";

                byte[] data = Encoding.UTF8.GetBytes(postData);
                Stream newStream = request.GetRequestStream();
                newStream.Write(data, 0, data.Length);
                newStream.Close();

                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                Stream stream = response.GetResponseStream();

                using (StreamReader sr = new StreamReader(stream))
                {
                    result = sr.ReadToEnd();
                }
                return result;
            }

            catch (Exception ex)
            {
                throw ex;
            }

        }

        /// <summary>
        /// post请求
        /// </summary>
        /// <param name="url"></param>
        /// <param name="postData"></param>
        /// <returns></returns>
        public static string DoPost(string url, string postData)
        {
            return DoPost(url, postData, null);
        }

        private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
        {
            if (errors == SslPolicyErrors.None)
                return true; //总是接受  

            return false;
        }
    }
}