gistfile1.js

Function.prototype.curry = function() {
  var fn = this, args = Array.prototype.slice.call(arguments);
  return function() {
    return fn.apply(this, args.concat(
      Array.prototype.slice.call(arguments)));
  };
};

var YES = true,
    NO = false;

var Controller = {
  render: function(template){},
  validate: function(data){},
  
  handler: function(isPost, request, response, params){
    if(isPost) this.validate(params);
    
    this.render("template.ext");
  }
}

app.route = function(url, handler){
  this['get'].call(this, [url, handler.curry(NO)]);
  this['post'].call(this, [url, handler.curry(YES)]);
}

app.route('/', Controller.handler);