riyaz-ali

let Middleware = function() { };

// executes the middlewares supplying initial args to the first middleware
// this function returns a Promise which gets resolved after the last middleware is executed
Middleware.prototype.exec = function() {
  let args = Array.prototype.slice.call(arguments);
  let that = this
  return new Promise(function(resolve /*,reject */){
    let pr = this;
    let end = function(){