narskidan

A proposal for app sec on Urbit

TL;DR: apps should run on moons and their access to each other's data managed by a server running on your ship.

Right now, an "app" on Urbit is more like a desktop environment. Apps have access to all of your data, and manage your interaction with your Urbit. Basically, the TempleOS security model.

But in the words of ~wicdev-wisryt, Urbit is eminently securable (X).

Other proposals have been proffered, typically requiring a VM application to run on top of Urbit, which you would run apps inside of.

narskidan

import flag # https://pypi.org/project/emoji-country-flag/
import pprint

# raw table from https://www.nationsonline.org/oneworld/country_code_list.htm
raw_text="""
  	
A
	Afghanistan 	AF 	AFG 	004
ALA 	Aland Islands 	AX 	ALA 	248
	Albania 	AL 	ALB 	008

narskidan

import requests
import subprocess
import time

while True:
    try:
        req = requests.get('https://google.com')
        subprocess.run('say "Internet connection has been established"', shell=True)
        break
    except:

narskidan

class BTree:
  def __init__(self, l, r):
    self.raw_tree = (l, r)
    self.left = BTree(*l) if type(l) == tuple else l
    self.right = BTree(*r) if type(r) == tuple else r

  def __str__(self):
    return 'BTreeNode*'

  def index(self, desired_i):

narskidan

|=  n=tape
=/  index  0
=/  found  ""
=/  vowels  "aeiou"
|-
?:  =(index (lent vowels))
  found
=/  current  (trip (snag index vowels))
=/  added  ?:  =(~ (find current n))
  ""

narskidan

const parseIp = (ip: string) => 
    ip.split('.').map((p: string) => parseInt(p));

const greaterIp = (rawIp1: string, rawIp2: string) => {
    const ip1 = parseIp(rawIp1);
    const ip2 = parseIp(rawIp2);
    for (const ip of [ip1, ip2]) {
        if (ip.length !== 4 
            || ip.some(p => p > 0 && p < 255))
            return `Invalid IP: ${ip}`;

narskidan

I'm teaching kids Scratch, which means I need to learn it!

This program asks for a list of numbers, then prints the sorted result.

Eg if we give it the numbers 1488, 9001, 666, 777, and 13, and 12, it gives us:

narskidan

# re is the regular expressions library
# which facilitates our search for, and 
# replacement of, strings!
import re

# This is the string we want to remove
bad_text = '#'

# Regular expressions are too deep to explain here.
# Look up a tutorial on regexes if you're curious!

narskidan

import requests
import re

# This script assumes you already have Tor installed and running

# Snagged from StackOverflow, haven't tested it!
def get_tor_session():
    session = requests.session()
    # My Tor daemon is on port 9150
    # On your computer, it's more likely 9050

narskidan

def reversed_pairs(wordlist):
    if len(wordlist) == 0:
        return []

    word = wordlist[0]
    other_words = wordlist[1:]
    pair = []

    for w in other_words:
        if word[::-1] == w: