Express Route Param Pre-conditions combined with express-namespace

param.js

// This is an example of the Route Param Pre-condition
// feature of Express.  It also uses express-namespace
// Documentation for the Route Param Pre-condition can 
// be found here: 
//  http://expressjs.com/guide.html#route-param pre-conditions
var express = require('express'),
    ns = require('express-namespace'),
    app = express.createServer();

app.param('id', function(req, res, next, id) {
    process.stdout.write('id = ' + id + '\n');
    // Put the id in the request so it can be used by
    // the route handler.  Something more useful could
    // be done here like loading configuration or
    // pulling something out of the database
    req.someId = id;
    next();
});

app.namespace('/:id', function() {

    app.get('/', function(req, res) {
        res.send('hello world: ' + req.someId);
    });
});

app.listen(3000);