/// <summary>
  /// 蘋果內(nèi)購支付
  /// </summary>
  public class ApplePay
  {
    /// <summary>
    /// 蘋果驗證支付
    /// </summary>
    /// <param name="appleReceipt">蘋果內(nèi)購的驗證收據(jù)</param>
    /// <param name="orderCode">訂單號</param>
    /// <returns></returns>
    public string ValidateApplePay(string appleReceipt, string orderCode)
    {
      try
      {
        //客戶端post過來的參數(shù)
        //string appleReceipt = HttpContext.Current.Request.Form["appleReceipt"]; //蘋果內(nèi)購的驗證收據(jù)
        //string orderCode = HttpContext.Current.Request.Form["orderCode"];       //訂單號

        // 驗證參數(shù)
        if (appleReceipt.Length < 20)
        {
          return "false";
        }

        string strJosn = string.Format("{{\"receipt-data\":\"{0}\"}}", appleReceipt);
        // 請求驗證
        string strResult = CreatePostHttpResponse(strJosn, System.Convert.ToBoolean(ConfigurationManager.AppSettings["PayEnvironment"]));
        JObject obj = JObject.Parse(strResult);//using Newtonsoft.Json.Linq;

        // 判斷是否購買成功
        #region 蘋果內(nèi)購服務(wù)器驗證碼
        if (obj["status"].ToString() == "0")
        {
          return "true";
        }
        else if (obj["status"].ToString() == "1")
        {
          return "憑據(jù)不在白名單之內(nèi)";
        }
        else if (obj["status"].ToString() == "2")
        {
          return "偽造充值";
        }
        else if (obj["status"].ToString() == "3")
        {
          return "憑據(jù)不存在偽造充值";
        }
        else if (obj["status"].ToString() == "4")
        {
          return "支付時間過期";
        }
        else if (obj["status"].ToString() == "6")
        {
          return "非法憑據(jù)";
        }
        else if (obj["status"].ToString() == "21000")
        {
          return "App Store無法讀取你提供的JSON數(shù)據(jù)";
        }
        else if (obj["status"].ToString() == "21002")
        {
          return "收據(jù)數(shù)據(jù)不符合格式";
        }
        else if (obj["status"].ToString() == "21003")
        {
          return "收據(jù)無法被驗證";
        }
        else if (obj["status"].ToString() == "21004")
        {
          return "你提供的共享密鑰和賬戶的共享密鑰不一致";
        }
        else if (obj["status"].ToString() == "21005")
        {
          return "收據(jù)服務(wù)器當(dāng)前不可用";
        }
        else if (obj["status"].ToString() == "21006")
        {
          return "收據(jù)是有效的，但訂閱服務(wù)已經(jīng)過期允坚。當(dāng)收到這個信息時，解碼后的收據(jù)信息也包含在返回內(nèi)容中";
        }
        else if (obj["status"].ToString() == "21007")
        {
          return "收據(jù)信息是測試用（sandbox），但卻被發(fā)送到產(chǎn)品環(huán)境中驗證";
        }
        else if (obj["status"].ToString() == "21008")
        {
          return "收據(jù)信息是產(chǎn)品環(huán)境中使用，但卻被發(fā)送到測試環(huán)境中驗證";
        }
        else
        {
          return "false";
        }
        #endregion
      }
      catch (System.Exception)
      {
        return null;
      }
    }
    /// <summary>
    /// 請求蘋果支付
    /// </summary>
    /// <param name="datas">strJosn 支付單據(jù)</param>
    /// <param name="isUrl">是否開啟正式模式(默認(rèn)false)</param>
    /// <returns></returns>
    public string CreatePostHttpResponse(string datas, bool isUrl = false)
    {
      try
      {
        //正式購買地址 沙盒購買地址
        string url_buy = "https://buy.itunes.apple.com/verifyReceipt";
        string url_sandbox = "https://sandbox.itunes.apple.com/verifyReceipt";
        string url = isUrl == false ? url_sandbox : url_buy;

        HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
        request.ProtocolVersion = HttpVersion.Version10;
        request.Method = "POST";
        request.ContentType = "application/x-www-form-urlencoded";
        byte[] data = Encoding.GetEncoding("UTF-8").GetBytes(datas.ToString());
        using (Stream stream = request.GetRequestStream())
        {
          stream.Write(data, 0, data.Length);
        }

        HttpWebResponse response = request.GetResponse() as HttpWebResponse;
        Stream responseStream = response.GetResponseStream();   //獲取響應(yīng)的字符串流
        StreamReader sr = new StreamReader(responseStream); //創(chuàng)建一個stream讀取流

        var str = sr.ReadToEnd();
        sr.Close();
        responseStream.Close();
        return str.ToString();
      }
      catch (System.Exception)
      {
        return string.Empty;
      }
    }
  }