AWS Lambda Function to Get Internet IP

lambda-get-ip.js

const http = require('http');

exports.handler = function(event, context, callback) {
  const option = {
    "hostname": "api.ipify.org",
    "path": "/?format=JSON",
    "method": "GET"
  };

  callback(null, Request(option).
    then((data) => {
      console.log('IP = ', data);
    }).catch((err) => {
      console.error(err);
    })
  );
};

function Request(options) {
  return new Promise((resolve, reject) => {
    const req = http.request(options, (res) => {
      let body = '';
      // console.log('Status:', res.statusCode);
      // console.log('Headers:', JSON.stringify(res.headers));
      res.setEncoding('utf8');
      res.on('data', (chunk) => body += chunk);
      res.on('end', () => {
        // console.log('Successfully processed HTTP response');
        // If we know it's JSON, parse it
        if (res.headers['content-type'] === 'application/json') {
            body = JSON.parse(body);
        }
        resolve(body);
      });
    });
    req.on('error', (err) => {
        reject(err);
    });
    req.write('');
    req.end();
  });
}