Don't know if useful

gistfile1.txt

'use strict';

var Promise = require('bluebird');

module.exports = getStreamData;

// return ascii character value from two ascii character values in hex representation
function fromHex(b1, b2) {
    b1 -= 48; if (b1 > 9) { b1 -= 7; } // A -> 10
    b2 -= 48; if (b2 > 9) { b2 -= 7; }
    return b1 * 16 + b2;
};

function getStreamData(stream) {
    var buffers = [ ], deferred = Promise.defer();
    stream.on('data', function (chunk) {
        buffers.push(chunk);
    });
    stream.on('error', function (err) {
        deferred.reject(err);
    });
    stream.on('end', function () {
        // lazy evaluation
        buffers.__defineGetter__('buffer', function () {
            var buf = Buffer.concat(buffers);
            Object.defineProperty(buffers, 'buffer', {
                value: buf
            });
            return buf;
        });
        buffers.__defineGetter__('fromQueryString', function () {
            var buf = buffers.buffer, iskey = true,
                key = [], val = [], obj = { },
                i = 0, j = 0, x = buf.length;
            
            while (i < x) {
                switch(buf[i]) {
                    case 38: // &
                        iskey = true;
                        obj[(new Buffer(key)).toString()] = (new Buffer(val)).toString();
                        key.length = val.length = 0;
                    break;
                    
                    case 61: // =
                        iskey = false;
                    break;
                    
                    case 37: // %
                        i++;
                        (iskey ? key : val).push(fromHex(buf[i++], buf[i]));
                    break;
                    
                    default:
                        (iskey ? key : val).push(buf[i]);
                    break;
                }
                i++;
            }
            obj[(new Buffer(key)).toString()] = (new Buffer(val)).toString();
            
            Object.defineProperty(buffers, 'object', { value: obj });
            buffers.__defineGetter__('string', function () {
                var str = JSON.stringify(obj);
                Object.defineProperty(buffers, 'string', {
                    value: str
                });
                return str;
            });
            buffers.__defineGetter__('buffer', function () {
                var buf = new Buffer(buffers.string);
                Object.defineProperty(buffers, 'buffer', {
                    value: buf
                });
                return buf;
            });
            
            return obj;
        });
        buffers.__defineGetter__('string', function (encoding) {
            var str = buffers.buffer.toString(encoding);
            Object.defineProperty(buffers, 'string', {
                value: str
            });
            return str;
        });
        buffers.__defineGetter__
        buffers.__defineGetter__('object', function () {
            var obj;
            try { obj = JSON.parse(buffers.string); }
            catch (e) { obj = new Error(e); }
            
            Object.defineProperty(buffers, 'object', {
                value: obj
            });
            return obj;
        });
        deferred.resolve(buffers);
    });
    return deferred.promise;
};