Kada Liao kadaliao

Exporting your 2FA tokens from Authy to transfer them into another 2FA application

IMPORTANT - Update regarding deprecation of Authy desktop apps

Past August 2024, Authy stopped supported the desktop version of their apps:
See Authy is shutting down its desktop app | The 2FA app Authy will only be available on Android and iOS starting in August for details.

And indeed, after a while, Authy changed something in their backend which now prevents the old desktop app from logging in. If you are already logged in, then you are in luck, and you can follow the instructions below to export to tokens.

If you are not logged in anymore, but can find a backup of the necessary files, then restore those files, and re-install Authy 2.2.3 following the instructions below, and it should work as expected.

Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

在 Xcode 里下载文件真的是一种折磨, 特别是每次 Xcode 大版本更新都会遇到新的下载内容. 经过一翻周折, 本人找到一个方法可以轻松快速便捷地下载和安装对应的 Simulator 和 Doc 文件

在 Mac 下, 打开 Xcode, 进入 Preference 中的 Downloads 面板
点击任意的下载按钮
打开系统帮助工具 Console
稍等一会儿, 在 Xcode 里取消下载, 然后你会在 Console 里面看到对应的下载地址 (对应的 Cosnole Message 是 (DVTDownloadable: Download Cancelled. Downloadable: ...) 之类的)
复制对应的链接地址, 到某雷或者任何比 Xcode 下载快的工具里
等待下载完成, 进入 /Users/#{Username}/Library/Caches

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

	import tiktoken
	import langdetect
	T = tiktoken.get_encoding("o200k_base")

	length_dict = {}

	for i in range(T.n_vocab):
	try:
	length_dict[i] = len(T.decode([i]))
	except:

	#!/usr/bin/env python3
	# -- coding: utf-8 --

	helpDoc = '''
	Add Page Number to PDF file with Python
	Python 给 PDF 添加页码
	usage:
	python addPageNumberToPDF.py [PDF path]

	require:

	#!/usr/bin/env python

	import subprocess
	from flask import Flask, render_template
	from flask_socketio import SocketIO, send, emit

	HTML = '''
	<html>
	<head>
	<title>WEBSHELL</title>

	# RSA helper class for pycrypto
	# Copyright (c) Dennis Lee
	# Date 21 Mar 2017

	# Description:
	# Python helper class to perform RSA encryption, decryption,
	# signing, verifying signatures & keys generation

	# Dependencies Packages:
	# pycrypto

	#!/bin/bash

	# tmux requires unrecognized OSC sequences to be wrapped with DCS tmux;
	# <sequence> ST, and for all ESCs in <sequence> to be replaced with ESC ESC. It
	# only accepts ESC backslash for ST.
	function print_osc() {
	if [[ -n $TERM ]] ; then
	printf "\033Ptmux;\033\033]"
	else
	printf "\033]"

	#!/usr/bin/python
	# coding=UTF-8
	import re;
	import os;

	# all those glyphs will show as weird squares if you don't have the correct patched font
	file_node_extensions = {
	'.styl' : '',
	'.scss' : '',
	'.htm' : '',