Lazy parser

lazy_parser.js

var MyObject = function (url, req, res, path, body) {
    this.res = res;           // Object
    this.req = req;           // Object
    this.body = body;         // String
    this.url = url;           // Object
    this.method = req.method; // String
    this.get = url.query;     // Object
    this.path = path || {};   // Object 
};

MyObject.prototype = {
    constructor: MyObject,

    /* Lazy Request body parser */
    get post() {
        var req = this.req;
        // create own property to "owerwrite" prototype
        this.post = req.body ? BodyParser.parse(req.headers['content-type'] || '', req.body) : {};
        return this.post;
    }
    /* Other Lazy methods */
};

var myObject = new MyObject(/* ... */);

MyObject.post.pewpew;  // lazy init uses getter get post()
MyObject.post.pewpew2; // now uses own parsed post property