gistfile1.js

/**
 * Module dependencies and config.
 */

var express = require('express')
var rTorrent = require('rtorrent')

var rt = new rTorrent({
	host : 'localhost',
	port : 80,
	path : '/RPC2'
});
rt.details(function(err, torrents) {
	console.log('your list of torrents', torrents);
})

var app = module.exports = express();
app.get('/', function(req, res) {
	res.send('Hello World');
	console.log('page render');
});

app.listen(3000);
console.log('Listening on port 3000');

I have not used rtorrent with nginx.

If you can get to rtorrent with xmlrpc using the server ip/url then use it with you config.

something like.

var rTorrent = require('rtorrent')

var rt = new rTorrent({
    host : '192.168.1.20',
    port : 5000,
    path : '/RPC2'
});
rt.details(function(err, torrents, raw) {
    if(err) throw err;
    console.log('your list of torrents', torrents, raw);
})