JS: download file via node.js

download.js

var http      = require('http');
var url       = require('url');
var fs        = require('fs');
var XmlStream = require('xml-stream');
var config    = require('./config.json'); // already parsed

var downloadFile = function( targetUrl ) {
    var xmlItem   = "";
    var timestamp = parseInt( new Date().getTime() / 1000 );
    var options   = {
        host : url.parse( targetUrl ).host,
        port : 80,
        path : url.parse( targetUrl ).pathname
    };
    var downloadFileName = options.path.substring( options.path.lastIndexOf('/') + 1, options.path.length );
    var downloadFile     = fs.createWriteStream( downloadFileName, {'flags': 'w'});

    http.get( options, function(res) {
        res.setEncoding('utf8');
        var xmlStream = new XmlStream(res);
        
        xmlStream.on('startElement: ' + config.tagname, function(item) {
            xmlItem = {};
        });

        xmlStream.on('updateElement: ' + config.tagname, function(element) {
            console.log(element);
            xmlItem['tomas_id']    = element.$.ObjectID;
            xmlItem['type']        = 'map';
            xmlItem['data_source'] = 'tomas';
        });

        xmlStream.on('text: ' + config.tagname + ' > Latitude', function( element ) {
            xmlItem['latitude'] = element.$text;
        });

        xmlStream.on('text: ' + config.tagname + ' > Longitude', function( element ) {
            xmlItem['longitude'] = element.$text;
        });
        
        xmlStream.on('endElement: ' + config.tagname, function(item) {
            console.log("endElement......");
            console.log( xmlItem );
            xmlItem = {};
        });

        // backup data in file
        xmlStream.on('data', function(data) {
            downloadFile.write(data);
        });

        // when complete
        xmlStream.on('end', function() {
            console.log("download end; duration: " + ( parseInt( new Date().getTime() / 1000 ) - timestamp ) + " seconds." );
            downloadFile.end();
        });
    } );

};

http.createServer( function( req, res ) {
    if ( req.url === "/" ) {
        console.log( config.url );
        downloadFile( config.url );

    }
    res.writeHead( 200, { 'Content-Type' : 'text/plain' } );
    res.end( 'Operation successful' );
} ).listen( 1337, '127.0.0.1' );