app.js

var host="somehost";
var request = require('request');
var myMap = new Map();

for(var i = 2 ; i<process.argv.length; i++){
  let orig = process.argv[i];
  //console.log(orig);
  let r = request.get(host+process.argv[i], function (err, res, body) {
    //console.log(r.uri.href);
    rs = r.uri.href.split("/");
    rs1 = "../../images/" + rs[rs.length-1];
    myMap.set(orig,rs1);
    console.log(myMap);
  });
}


console.log("Done");
console.log(myMap);