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A ghost

Nathan myobie

A ghost
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myobie / params.ex
Created May 26, 2021
I'm not saying this is a good idea, but I'm not not saying it
View params.ex
defmodule POC.Params do
import Ecto.Changeset
@spec permit(map, map) :: map
def permit(input, types) do
{types, nested} = Enum.reduce(types, {%{}, %{}}, &process_types/2)
{%{}, types}
|> cast(input, Map.keys(types))
|> permit_nested(nested)
myobie / router.ex
Last active Apr 15, 2021
A pipeline for proxying large file uploads
View router.ex
defmodule AppWeb.Router do
use AppWeb, :router
pipeline :browser do
plug Plug.Parsers,
parsers: [:urlencoded, :multipart, :json],
pass: ["*/*"],
json_decoder: Phoenix.json_library()
plug Plug.MethodOverride
myobie / poller.ex
Last active Apr 8, 2021
GenServer for longpoll requests with backoff in case of errors
View poller.ex
defmodule Example.Poller do
use GenServer
@backoff [
View identifier.swift
import Foundation
public struct Identifier:
Codable, CustomStringConvertible, ExpressibleByStringLiteral,
Hashable, RawRepresentable
public let rawValue: [UInt8]
public let dataValue: Data
private let stringValue: String

Previewing encrypted content on the web

This would be an extension to The Open Graph protocol.

As more and more people are using privacy preserving tools for sharing content on the web, more content embedded into web pages will be end-to-end encrypted and decrypted in-browser by javascript or wasm code.

A current problem with previews of web URLs is they require the server to know the exact contents of the URL and be able to provide a preview as a resource either inside a header or as a URL to an image. If the primary content at the URL were encrypted, no preview could be provided directly by the server.

What the server could provide is an encrypted preview which was encrypted with a symmetric key by the original creator using one of the standard algorithms provided by webcrypto. Then the browser/client could find the decryption key in the URL fragment (or prompt the user for it) to then facilitate the decryption of the preview content safely on device. This would provide a standard

myobie / application.ex
Last active Apr 1, 2021
Using Finch with ExAws
View application.ex
defmodule Example.Application do
@moduledoc false
use Application
def start(_type, _args) do
children = [
{Phoenix.PubSub, name: Example.PubSub},
View runner.ts
const worker = new Worker('/tests.js')
worker.onmessage = e => {
if ( && {
if ( === 'console') {
const type = || 'log'
const msg = || '<empty>'
switch (type) {
case 'error':
myobie / drain.js
Last active Jan 25, 2021
Drain an array of potential promises with a max concurrency factor
View drain.js
/** @typedef {() => Promise<unknown>} Task */
* @param {Task[]} pending
* @param {number} max
* @returns {Promise<unknown[]>}
export function drain (pending, max) {
return new Promise((resolve, reject) => {
let nextIndex = 0
myobie / build-utils.cjs
Created Jan 7, 2021
Using estrella to build tests, serve-handler to serve the results, and playwright to execute the tests and stream the logs back to the node console
View build-utils.cjs
const { join, resolve } = require('path')
const { basename, build, file, log, glob, cliopts, stdoutStyle, watch } = require('estrella')
async function serve (cwd, opts = null) {
opts || (opts = {})
let pkgOpts = { devServerPort: null, publicPath: null, rewrites: null, redirects: null }
if (isNodeProject(cwd)) {
const pkg = JSON.parse(await, 'package.json'), { encoding: 'utf8' }))
myobie / tests.ts
Created Jan 7, 2021
Build tests with esbuild, serve them with vercel's serve-handler, then use playwright to open a browser and stream the console back to the node console
View tests.ts
// NOTE: we are just assuming _tests is an alright place to render to
export async function buildAndRunTests (cwd: string): Promise<void> {
const [{ once }] = cliopts.parse(
['o, once', 'run the tests and then exit']
await file.mkdirs(join(cwd, '_tests'))
await buildBrowserTests(cwd)