调用APP标准消息接口推送信息http协议

调用协议：Http协议 
调用方式：CRM中新分派线索（实时）或者线索未及时更新（定时，每天执行一次）时，调用APP标准消息接口推送信息，成功后返回标记已通知过。 接口调用方法如下：
{
  "apikey":"xxxsadfsd",
  "identifier":"com.xx.xx",//向移动应用平台申请
  "receiverType":"NAME",
  "receiverValue":"12313",//接收人员工号，多个以逗号分隔
  "title":"aaaaa012",//消息标题
  "content":"您有一条新任务aaa",//消息内容
  "msgType":"CHAT"
}
调用地址：https://xx.xx.com:9780/mapservice/appPush/sendMsg

string url = "https://xx.xx.com:9780/mapservice/appPush/sendMsg";
                    string param = "{\"apikey\": \"xxsad121\",\"identifier\": \"com.xx.xs\",\"receiverType\": \"NAME\",\"receiverValue\": \"" + ownerUser["employeeid"].ToString() + "\",\"title\": \"您有一条信息\", \"content\": \" " + messageTitle + "\",\"msgType\": \"CHAT\"}";
                    Log.WriteLog(param);
                    string callback = PostLead(url, param);
                    Log.WriteLog(callback);
                    System.Web.Script.Serialization.JavaScriptSerializer json = new System.Web.Script.Serialization.JavaScriptSerializer();

                    LeadJson leadjson = json.Deserialize<LeadJson>(callback);
                    if (leadjson.result == "True")
                    {
                        Log.WriteLog(leadjson.result);
                        //userService.Update(entity);
                    } 
 public static string PostLead(string url, string param)
        {
            ServicePointManager.ServerCertificateValidationCallback = RemoteCertificateValidate;
            string strURL = url;
            System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)WebRequest.Create(strURL);
            request.Method = "POST";
            request.ContentType = "application/json;charset=UTF-8";
            string paraUrlCoded = param;
            byte[] payload;
            payload = System.Text.Encoding.UTF8.GetBytes(paraUrlCoded);
            request.ContentLength = payload.Length;
            Stream writer = request.GetRequestStream();
            writer.Write(payload, 0, payload.Length);
            writer.Close();
            System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse();
            System.IO.Stream s= response.GetResponseStream();
            string StrDate = "";
            string strValue = "";
            StreamReader Reader = new StreamReader(s, Encoding.UTF8);
            while ((StrDate = Reader.ReadLine()) != null)
            {
                strValue += StrDate + "\r\n";
            }
            return strValue;

        }

        public class LeadJson
        {
            public String result { get; set; }
        }

//调用Https WebService发布后使用时报“基础连接已经关闭: 未能为 SSL/TLS 安全通道建立信任关系”证书验证失败的解决过程    不加这句话为报错   The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.    
                private static bool RemoteCertificateValidate(object sender, X509Certificate cert, X509Chain chain, SslPolicyErrors error)
        {
            // trust any certificate!!!
            System.Console.WriteLine("Warning, trust any certificate");
            //为了通过证书验证，总是返回true
            return true;
        }