Mendelson Gusmão mendelgusmao

Setting up Jellyfin and Chromecast using Docker, Nginx, and dnsmasq

1/03/2023

Requirements
Guide Specific Requirements
Installing Docker
Installing Jellyfin and Nginx
Set up our DNS server
Block Chromecast's hardcoded DNS server

github.com/twotwotwo/sorts is a Go package with parallel radix- and quicksorts. It can run up to 5x faster than stdlib sort on the right kind of large sort task, so it could be useful for analysis and indexing/database-y work in which you have to sort millions of items. (To be clear, I don't recommend most folks drop stdlib sort, which is great, and which sorts depends on.)

While the process of writing it's fresh on my mind, here are some technical details, some things that didn't make the cut, and some thoughts about the process:

Concretely, what this looks like inside:

Both number and string versions are in-place MSD radix sorts that look at a byte at a time and, once the range being sorted gets down to 128 items, call (essentially) the stdlib's quicksort.
The [parallelization code

TLDR: I now add the following snippet to all my Dockerfiles:

# If host is running squid-deb-proxy on port 8000, populate /etc/apt/apt.conf.d/30proxy
# By default, squid-deb-proxy 403s unknown sources, so apt shouldn't proxy ppa.launchpad.net
RUN route -n | awk '/^0.0.0.0/ {print $2}' > /tmp/host_ip.txt
RUN echo "HEAD /" | nc `cat /tmp/host_ip.txt` 8000 | grep squid-deb-proxy \
  && (echo "Acquire::http::Proxy \"http://$(cat /tmp/host_ip.txt):8000\";" > /etc/apt/apt.conf.d/30proxy) \
  && (echo "Acquire::http::Proxy::ppa.launchpad.net DIRECT;" >> /etc/apt/apt.conf.d/30proxy) \
  || echo "No squid-deb-proxy detected on docker host"

a simple git branching model (written in 2013)

This is a very simple git workflow. It (and variants) is in use by many people. I settled on it after using it very effectively at Athena. GitHub does something similar; Zach Holman mentioned it in this talk.

Update: Woah, thanks for all the attention. Didn't expect this simple rant to get popular.

Guide to how fucked is SSL?

Thanks to Jacob Kaplan-Moss, Donald Stufft, David Reid, Allen Short, Zain Memon, and Chris Armstrong for review.

This is a guide for technical individuals to understand in what circumstances SSL communications are secure against an observer-in-the-middle (for all intents and purposes: the NSA).

-/*
-This script, when used with Google Apps Scripts, will delete 400 emails and
-can be triggered to run every few minutes without user interaction enabling you
-to bulk delete email in Gmail without getting the #793 error from Gmail.
-Google returns a maximum of 500 email threads in a single API call.
-This script fetches 400 threads in case 500 threads is causing timeouts
-Configure the search query in the code below to match the type of emails
-you want to delete

	/*
	Reads voltage and power from China-style energy meter.
	Collecting data by eavesdropping on the MOSI-line (master in slave out)
	between the energy monitoring chip (ECH1560) and the main processor*/

	const int CLKPin = 2; // Pin connected to CLK (D2 & INT0)
	const int MISOPin = 5; // Pin connected to MISO (D5)

	//All variables that is changed in the interrupt function must be volatile to make sure changes are saved.
	volatile int Ba = 0; //Store MISO-byte 1

	// Traverses an arbitrary struct and translates all stings it encounters
	//
	// I haven't seen an example for reflection traversing an arbitrary struct, so
	// I want to share this with you. If you encounter any bugs or want to see
	// another example please comment.
	//
	// The MIT License (MIT)
	//
	// Copyright (c) 2014 Heye Vöcking
	//

	package main

	import (
	"log"
	"math"
	)

	func Round(val float64, roundOn float64, places int ) (newVal float64) {
	var round float64
	pow := math.Pow(10, float64(places))

	function getTrilateration(position1, position2, position3) {
	var xa = position1.x;
	var ya = position1.y;
	var xb = position2.x;
	var yb = position2.y;
	var xc = position3.x;
	var yc = position3.y;
	var ra = position1.distance;
	var rb = position2.distance;
	var rc = position3.distance;