lambda-post.js

'use strict';

exports.handler = (event, context, callback) => {
  const execSync = require('child_process').execSync;
  var http = require('http');
  var ip = event["headers"]["X-Forwarded-For"].split(",")[0];

  http.get({ host: 'freegeoip.net', path: '/json/' + ip }, function(res) {
    res.on("data", function(chunk) {
      var city = JSON.parse(chunk.toString())["city"].toLowerCase();
      var state = JSON.parse(chunk.toString())["region_name"].toLowerCase();
      execSync(cmd(ip, city, state));
    });
  });

  function cmd(ip, city, state) {
    return "curl -X PUT -d '" + data(ip, city, state) + "' '" + url() + "'"
  }

  function url() {
    var datetime = new Date().toISOString().split("-").join("").split("T").join("").split(":").slice(0, -1).join("");
    return "https://my-url.firebaseio.com/datetimes/" + datetime + ".json"
  }

  function data(ip, city, state) {
    return JSON.stringify({"ip": ip, "city": city, "state": state})
  }
};