stdin.js

    postArgs: function(data) {
        data.toString = function(format) {
            return format.replace(/%([^%]+)%/g, function(_, key) {
                return this.hasOwnProperty(key) ? this[key] : '';
            }.bind(this));
        }

        var format = "";
        for (var key in data) {
            if (key !== 'toString') {
                format = format + key + "=%" + key + "%&";
            }
        }
        return data.toString(format);
    },