http static file server ./public/ with node

serve-public.js

var http = require('http'),
    send = require('send'),  // npm install send
    url = require('url'),

    app = http.createServer(function(req, res){

        function redirect() {
            res.statusCode = 301;
            res.setHeader('Location', req.url + '/');
            res.end('Redirecting to ' + req.url + '/');
        }

        send(req, url.parse(req.url).pathname)
            .root('./public')
            .on('directory', redirect)
            .pipe(res);
    });

app.listen(1975, "0.0.0.0");

console.log("try http://localhost:1975/");