An example of a simple web server using Node and Express

app.js

var http    = require('http');
var express = require('express');
var routes  = require('./routes');
var app     = express();
var server  = http.createServer(app);

app.configure(function() {
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(express.static(__dirname + '/public'));
  app.use(express.logger());
  app.use(express.errorHandler({
    dumpExceptions: true,
    showStack: true
  }));
  app.use(app.router);
});

routes.configRoutes(app, server);

server.listen(3000);

console.log(
  'Express server listening on port %d in %s mode',
   server.address().port,
   app.settings.env
);

package.json

{
  "name": "exmaple",
  "version": "0.0.0",
  "private": true,
  "dependencies": {
    "express": "3.2.x"
  }
}

routes.js

var configRoutes = function(app, server) {
  app.all('/api/:obj_type/*?', function(request, response, next) {
    response.contentType('json');
    next();
  });

  app.get('/api/:obj_type/list', function(request, response) {
    response.send({ title: request.params.obj_type + ' list' });
  });
};

module.exports = { configRoutes: configRoutes };

Usage:

npm install
node app.js