Opening maxmind DB and accessing it in nodejs

Previously I was using like this:

Opening Maxmind db in Nodejs

Now, updated the modules as per node 10. So, need help to integrate it.

reference

const maxmind = require('maxmind');
exports.getIsoCountry = function(pIpAddress) {

  modules.debugLog('inside getIsoCountry : ',pIpAddress);

  maxmind.open(sGlAppVariable.maxmindDbPath)
  .then(function(lookup) {
    var ipData = lookup.get(pIpAddress);
    //console.log(ipData);
    console.log('iso_code',ipData.country.iso_code);
    return ipData.country.iso_code;
  });

}

console.log(getIsoCountry('66.6.44.4')); it should print country code. but it is undefined always. because this is a promise.

How to call this getIsoCountry function?

Any help will be appreciated.

You need to wait for execution to complete, for that, you should use Promise.

Modify your code as below, then it should work:

const maxmind = require('maxmind');
exports.getIsoCountry = function(pIpAddress) {
  return new Promise((resolve, reject) => {
    modules.debugLog('inside getIsoCountry : ',pIpAddress);
      maxmind.open(sGlAppVariable.maxmindDbPath)
      .then(function(lookup) {
        var ipData = lookup.get(pIpAddress);
        console.log('iso_code',ipData.country.iso_code);
        resolve(ipData.country.iso_code);
      });
  });
}

getIsoCountry("66.6.44.4").then((rData) => {
  console.log(rData)
});

Below is sample code:

var getIsoCountry = function(pIpAddress) {

  return maxmind().then(function() {
       return "Code for IP: " + pIpAddress;
    });

  function maxmind() {
    return new Promise((resolve, reject) => {
      resolve("done")
    });
  }

}

getIsoCountry("1.1.1.1").then((data) => {
  console.log(data)
});