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Paul Mucur mudge

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@mudge
mudge / user.rb
Last active November 9, 2024 12:35
Transparently upgrade from bcrypt to Argon2id with Active Record
require "argon2id"
require "bcrypt"
# Schema: User(name: string, password_digest:string)
class User < ApplicationRecord
attr_reader :password
validates :password_digest, presence: true
validates :password, confirmation: true, allow_blank: true
@mudge
mudge / new.html.erb
Last active November 9, 2023 14:51
Using a custom direct upload controller with Rails Active Storage to limit file size before any data is uploaded
<%= form_with model: @post, data: { controller: 'upload', action: 'direct-upload:error@window->upload#error' } do |f| %>
<%= f.file_field(:image, data: { 'direct-upload-url' => uploads_url }) %>
<%= f.submit %>
<% end %>
@mudge
mudge / webcam-share-ended
Last active October 30, 2023 11:49
A Tuple Trigger to turn an Elgato Key light on and off when your webcam is shared
#!/bin/bash
if [[ "$TUPLE_TRIGGER_IS_SELF" == "true" ]]
then
curl --silent --request PUT --json '{"lights":[{"on":0}]}' http://elgato-key-light-air-2282.local:9123/elgato/lights
fi
@mudge
mudge / production.rb
Last active November 21, 2023 14:06
How to configure Rails and Rack::Attack to use the real client IP when running behind Cloudflare
Rails.application.configure do
# Add Cloudflare's IPs to the trusted proxy list so they are ignored when
# determining the true client IP.
#
# See https://www.cloudflare.com/ips-v4/ and https://www.cloudflare.com/ips-v6/
config.action_dispatch.trusted_proxies = ActionDispatch::RemoteIp::TRUSTED_PROXIES + %w[
173.245.48.0/20
103.21.244.0/22
103.22.200.0/22
103.31.4.0/22
@mudge
mudge / api_controller.rb
Last active March 24, 2023 05:27
Instruct Rails to respect the Accept header even if it contains a wildcard
class ApiController < ApplicationController
before_action :only_respect_accept_header
private
# By default, Rails will ignore the Accept header if it contains a wildcard
# and assume the client wants HTML (or JS if using XMLHttpRequest). See
# https://github.com/rails/rails/blob/a807a4f4f95798616a2a85856f77fdfc48da4832/actionpack/lib/action_dispatch/http/mime_negotiation.rb#L171-L173
#
# If you don't expect your clients to be browsers, we want to override this
@mudge
mudge / pdftk.rb
Created April 23, 2021 13:16
Homebrew Cask for PDFtk
cask "pdftk" do
version "2.02"
sha256 "c33cf95151e477953cd57c1ea9c99ebdc29d75f4c9af0d5f947b385995750b0c"
url "https://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/pdftk_server-#{version}-mac_osx-10.11-setup.pkg"
name "PDFtk"
desc "Tool for doing everyday things with PDF documents"
homepage "https://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/"
pkg "pdftk_server-2.02-mac_osx-10.11-setup.pkg"
@mudge
mudge / data_uri.rb
Last active December 16, 2022 12:10
A Ruby regular expression to parse data URIs based on RFC 2397.
require 'base64'
class DataUri
REGEXP = %r{
data:
(?<mediatype>
(?<mimetype> .+? / .+? )?
(?<parameters> (?: ; .+? = .+? )* )
)?
(?<extension>;base64)?
@mudge
mudge / blocklist.sh
Last active July 25, 2024 02:31
A Bash script to generate an Unbound configuration to block all domains on The Firebog's "The Big Blocklist Collection" and allow all domains on Anudeep's list
#!/bin/bash
set -euo pipefail
IFS=$'\n\t'
# Download all ticked blocklists from The Firebog's "The Big Blocklist
# Collection" [0] and block access to them with Unbound by redirecting traffic
# to 0.0.0.0.
#
# [0]: https://firebog.net
(
@mudge
mudge / pythagorean_means.rb
Last active May 20, 2021 10:55
A Ruby refinement to add methods to Enumerable for calculating the three Pythagorean means.
# A refinement to add methods to Enumerables for calculating the three
# Pythagorean means.
#
# See https://en.wikipedia.org/wiki/Pythagorean_means
module PythagoreanMeans
# Note that due to a bug refining modules in Ruby 2.7 [1], we can't `refine
# Enumerable` so we `refine Array` instead.
#
# See also https://interblah.net/why-is-nobody-using-refinements
@mudge
mudge / auto.sh
Created August 26, 2019 09:18
Auto-switch Node.js versions with chnode by reading .node-version files
# Based off chruby's auto.sh: https://github.com/postmodern/chruby#auto-switching
unset NODE_AUTO_VERSION
function chnode_auto() {
local dir="$PWD/" version
until [[ -z "$dir" ]]; do
dir="${dir%/*}"
if { read -r version <"$dir/.node-version"; } 2>/dev/null || [[ -n "$version" ]]; then