Fiddler extension for cracking Taiwan McDonald Coupon app which is available for both Android and iOS version (´・ω・｀)

fiddler.js

/*
======================
Author: 海豹
Date: 2017/1/22
Version: 1.0.0.0
Description: Fiddler extension for cracking Taiwan MacDonald Coupon app which is available for both Android and iOS version (´・ω・｀)
僅供學術使用 請勿用作非法用途
======================
*/
import System;
import System.Windows.Forms;
import System.Random;
import Fiddler;
import Newtonsoft.Json.Linq;
 
var verified;
var today: Date = new Date();
var version = "1.0.0.0";
var coupon_list;
var RNG = new Random();

class Handlers
{
	static function OnBeforeResponse(oSession: Session){
        if (oSession.uriContains("/coupon") && verified == 1){
            oSession.utilDecodeResponse();
            var oJobject = new JObject;
            var oBody = System.Text.Encoding.UTF8.GetString(oSession.responseBodyBytes);
            
            //=======================================================================
            var ParseStatus = 0;
            try
            {
                oJobject = JObject.Parse(oBody);
            }
            catch(e)
            {
                ParseStatus = 1;    
                oJobject = null;                
            }
                
            if (ParseStatus == 1)
            {
                return ;
            }
            //=======================================================================
            
            if (oSession.uriContains("/get_list")){
                for (var id in coupon_list){
                    oJobject['results']['coupons'].Add(gencoupon(coupon_list[id], 1));
                }
                FiddlerApplication.Log.LogString('Coupon List request');
            }
            
            if (oSession.uriContains("/get_detail")){
                oJobject["rc"] = 1;
                oJobject["rm"] = "成功";
                var results = new JObject;
                var coupon_id = JObject.Parse(oSession.GetRequestBodyAsString())["coupon_id"].ToString();
                coupon_id = coupon_id.Substring(coupon_id.Length - 3);
                results.Add("coupon", gencoupon(coupon_id, 1));
                oJobject.Add("results", results);
                FiddlerApplication.Log.LogString('Coupon Detail Request');
            }
            
            if (oSession.uriContains("/redeem")){
                oJobject["rc"] = 1;
                oJobject["rm"] = "成功";
                var results = new JObject;
                var coupon_id = JObject.Parse(oSession.GetRequestBodyAsString())["coupon_id"].ToString();
                var current_time = JObject.Parse(oSession.GetRequestBodyAsString())["source_info"]["device_time"].ToString()
                coupon_id = coupon_id.Substring(coupon_id.Length - 3);
                results.Add("coupon", gencoupon(coupon_id, 2));
                oJobject.Add("results", results);
                oJobject["results"]["coupon"].Add("redeem_datetime", current_time);
                oJobject["results"].Add("current_datetime", current_time);
                FiddlerApplication.Log.LogString('Coupon Redeem');
            }
            oSession.utilSetResponseBody(oJobject.ToString());
        }
        if (oSession.host == "v4.srv.seadog007.me"){
            if (oSession.uriContains("/mcdapp/version")){
                oSession.utilDecodeResponse();
                if (System.Text.Encoding.UTF8.GetString(oSession.responseBodyBytes) == version){
                    FiddlerApplication.Log.LogString('Verification confirmed');
                    verified = 1;
                    var url = "http://v4.srv.seadog007.me/mcdapp/list.txt";
                    FiddlerObject.utilIssueRequest("GET " + url + " HTTP/1.0\r\nLoadList: 1\r\n\r\n");
                    FiddlerApplication.Log.LogString('Fetching Coupon List');
                }else{
                    FiddlerApplication.Log.LogString(oSession.responseBodyBytes);
                    FiddlerApplication.Log.LogString("Verify Failed");
                }
            }
        }
        if (oSession.RequestHeaders["LoadList"] == 1){
            oSession.utilDecodeResponse();
            FiddlerApplication.Log.LogString("Prepare To Prase List");
            coupon_list = System.Text.Encoding.UTF8.GetString(oSession.responseBodyBytes).Remove(System.Text.Encoding.UTF8.GetString(oSession.responseBodyBytes).Length - 1, 1).Split("\n");
            FiddlerApplication.Log.LogString("List: " + coupon_list);
            FiddlerApplication.Log.LogString("List loaded");
        }
	}
       
    static function gencoupon(id, status){
        var coupon = new JObject;
        coupon.Add("coupon_id", int("123456" + id.ToString()));
        coupon.Add("type", "coupon");
        coupon.Add("status", int(status));
        var object_info = new JObject;
        object_info.Add("object_id", 123);
        var image = new JObject;
        image.Add("url", "http://v4.srv.seadog007.me/mcdapp/P_G" + id.ToString() + ".jpg");
        image.Add("width", 1080);
        image.Add("height", 1920);
        object_info.Add("image", image);
        object_info.Add("title", "test");
        object_info.Add("redeem_end_datetime", randomdate() + " 23:59:59");
        coupon.Add("object_info", object_info);
        return coupon;
    }
    static function randomdate(){
        var someDate = new Date();
        var numberOfDaysToAdd = RNG.Next(1,10);
        someDate.setDate(someDate.getDate() + numberOfDaysToAdd); 
        
        var dd = someDate.getDate();
        var mm = someDate.getMonth() + 1;
        var yyyy = someDate.getFullYear();

        return yyyy + "/"+ mm + "/" + dd;
    }
    static function Main() {
        FiddlerApplication.Log.LogString("-----------------New Run-----------------");
        var verified = 0;
        var url = "http://v4.srv.seadog007.me/mcdapp/version";
        FiddlerObject.utilIssueRequest("GET " + url + " HTTP/1.0\r\n\r\n");
        FiddlerApplication.Log.LogString("Verifcating");
        FiddlerObject.StatusText = " CustomRules.js was loaded at: " + today;
    }
}