stream.js

var http = require('http');
var fs = require('fs');
http.createServer(function (req, res) {
    res.writeHead(200, {'Content-Type': 'application/xml',
                        'Content-Encoding':'gzip'});  
    fs.createReadStream('medline13n0701.xml.gz').pipe(res);
}).listen(1337, '127.0.0.1');