问node.js快捷dns查找始终使用ipv4

EN

import Request from 'request';

export class SoapUtility extends Utility 
{

  constructor(options) {
        super();
        otherCode = otherCode;

        this.request = Request;
  };

  requestMainframe(args, callback) 
  {
    this.request.post({
        url: this.endpoints.userLookup,
        method: 'POST',
        family : 4,
        headers: {
            'Content-Type': 'text/xml',
            "Authorization": `Basic ${creds}`
        },
        body: requestBody,
        rejectUnauthorized: false, 
    }, (error, response, body) => {
          callback(error, null);
    });
  }
}