Service static cert using Node.js

Static serve file

var http = require('http'),
    path = require('path'),
    fs = require('fs');

http.createServer(function(req, res) {
    filename = './cacert.crt'
    path.exists(filename, function(exists) {
        res.writeHead(200, {'Content-disposition': 'attachment; filename=cacert.crt', 'Content-Type': 'text/plain'});
        var fileStream = fs.createReadStream(filename);
        fileStream.pipe(res);

    }); //end path.exists
}).listen(1337);