updownload.js

var fs = require('fs');
var data = //Your data source(an array of items)
var request = require('request');
var async = require('async');

var j = request.jar();

//If you need cookie auth
var cookie = request.cookie('cookieKey=cookieValue');
var url = 'you url server, example: http://mydomain.com';
j.setCookie(cookie, url);
request = request.defaults({jar:j})

function updateIcons(){

	var url = '<your url path to upload images>';

	async.eachSeries(data, function iterator(item, callback) {

		if(tour.icon){
			var filename = './images/' + item.filename;
			var imageData = fs.createReadStream(filename);
			
			var httpRequest = request.post(url, function(err,response,body){
				if(err) console.log(err);
				else if (response.statusCode > 300){
					return console.log(response.statusCode);
				}
				else{
			    try{
			    	//You can output some success log here
			      callback();
			    }catch(e){
			        console.log(e); //error in the above string(in this case,yes)!
			    }

				}				
			});

			var form = httpRequest.form();
			form.append('<id field name>',item.id);
			form.append('<file field name>', imageData);
			
		}else{
			callback();
		}

	});
}

function downloadIcons(){
	var basePath = './images/';
	var baseUrl = 'your url path to images on a server';
	
	var download = function(uri, filename, callback) {
	  console.log(uri, filename);

	  if(filename && typeof filename !== 'undefined'){
		  // make the filename not need a directory
		  var file = filename.split('/')[filename.split('/').length - 1];

		  request.head(uri, function(err, res, body) {

		    console.log('content-type:', res.headers['content-type']);
		    console.log('content-length:', res.headers['content-length']);

		    var r = request(uri).pipe(fs.createWriteStream(basePath + file));
		    r.on('close', callback);
		    r.on('error', error);
		  });
		}
	};

	for(var i = 0; i < data.length; i++){
		var item = data[i];
		if(item.icon){

		  var img_src = item.filename;
		  var filepath = (baseUrl + img_src).toString();

		  download(filepath, img_src, function() {
		    console.log('downloaded', img_src);
		  });
		}

	  //break;

	}	

	var error = function(message) {
	  console.log(message);
	};

}

downloadIcons();
//updateIcons();