getall.js

var Wreck = require('wreck');

function collectData(count) {
  var results = {};
  var called = 0;
  var index = 0;
  return function (url) {
    results[url] = {
      url: url,
      index: index
    };
    index += 1;
    Wreck.get(url, function (err, res, payload) {
      called += 1;
      results[url].payload = payload;
      if (called === count) {
        done(results);
      }
    });
  }
}

function done(results) {
  var payloads = [];
  Object.keys(results).forEach(function (key) {
    var result = results[key];
    payloads[result.index] = result.payload;
  });
  console.log(payloads.join('\n'));
}

var urls = process.argv.slice(2);
var collector = collectData(urls.length);

urls.forEach(collector);