我在同一个.js文件上创建了SOAP客户端和服务器。

索引.js

"use strict"
var soap = require('strong-soap').soap;
var express = require('express');
var Promise = require('promise');
var app = express();
var WSDL = soap.WSDL;

var xml = require('fs').readFileSync('centralsystemservice_1.5.wsdl','utf8');
var xmlCl = require('fs').readFileSync('chargingpointservice_1.5.wsdl','utf8');
var url = './chargingpointservice_1.5.wsdl';
function aa(args)
{
    console.log("<<<>>>",args.bb);
}

var path = "/dek";
var port = 9330;




soap.createClient(url, {}, (err, client) => {
  if(err)
    throw err;
  else 
  {
    client.setEndpoint('http://localhost:9330/Ocpp/ChargePointService/');
    client.ChargePointService.ChargePointServiceSoap12.Reset();
  }
});

app.post('/Ocpp/ChargePointService/', (req, res, next) => {
    console.log(req);
})


app.listen(port, () => {
  console.log("Listening on port "+port);
  soap.listen(app, path, service, xml);
});

我不能写的内容.wsdl文件，因为太长。我有一个问题：如何实现心跳或引导通知等功能？在编写OCPP协议中通信的功能时有什么限制吗？