node_http_collect.js

var http = require('http'),
  urls = [],
  results = {}

for(var i = 2; i < process.argv.length; i++) {
  urls.push(process.argv[i])
}

var log_end_results = function() {
  urls.forEach(function(url){
    console.log(results[url].full_response)
  })
}

var populate_complete_response = function(url) {
  results[url].data_list.forEach(function(data){
    results[url].full_response += data
  })
}

var results_storage_for = function(url) {
  return {
    "data_list": [],
    "full_response": '',
    "errors": [],
    "complete": false,
    "data": function(data) {
      results[url].data_list.push(data)
    },
    "error": function(error) {
      results[url].errors.push(error)
    },
    "end": function(end) {
      results[url].complete = true
      populate_complete_response(url)

      all_requests_complete = true

      urls.forEach(function(individual_url){
        if (results[individual_url].complete == false) all_requests_complete = false
      })

      if(all_requests_complete) log_end_results()
    }
  }
}

urls.forEach(function(url) {
  results[url] = results_storage_for(url)

  http.get(url,function(response) {
    response.setEncoding = 'utf8'
    response.on("data", results[url].data)
    response.on("error", results[url].error)
    response.on("end", results[url].end)
  })
})