jamesdavidson

// A queue of integer values, implemented as a linked-list.
// Careful, don't pop the queue if it's empty!
// Copyright (c) James Davidson 2015.
// Publicly released under the terms of the MIT License.
// For educational purposes only, obviously; no warranty implied.

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>

jamesdavidson

-- Euclid's algorithm for calculating the greatest-common-divisor.
gcd :: Integer -> Integer -> Integer
gcd x y =
  if r == 0 then y else (gcd y r)
    where r = (mod x y)

jamesdavidson

/*
  Software serial multple serial test
 
 Receives from the hardware serial, sends to software serial.
 Receives from software serial, sends to hardware serial.
 
 The circuit: 
 * RX is digital pin 2 (connect to TX of other device)
 * TX is digital pin 3 (connect to RX of other device)
 

jamesdavidson

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>example.lambda</groupId>
  <artifactId>jisho-b36491</artifactId>
  <packaging>jar</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>jisho-b36491</name>
  <url>http://maven.apache.org</url>
  <dependencies>

jamesdavidson

So, what did I try?

Well, first I tried to find a CMS that didn't need MySQL. Painful.

Then, I tried installing MySQL. They have made this very hard to
automate.

Then, I tried running MySQL in a Docker container. The first annoying
thing here was that I needed a specific version of Docker's API but that
also meant a specific version of the Python library and adding

jamesdavidson

# install and configure Wowza Streaming Engine
class profile::wowza {
  # Placeholder to install Wowza Streaming Engine (WowzaStreamingEngine-4.7.1-linux-x64-installer.run)

  $config             = hiera('wowza')
  $audio_upstream     = 'http://localhost:1935'
  $wowza_upstream     = 'http://localhost:8088'
  $shoutcast_upstream = 'http://localhost:8000'

  # The following URLs are for management:

jamesdavidson

variable jobnumber {
  default = "201802061831"
}

provider aws {
  region = "ap-southeast-2"
}

resource aws_sqs_queue asdf {
  receive_wait_time_seconds = 20 # enable long polling by default

jamesdavidson

#!/usr/bin/env python

# This program requires two filename arguments. Each file should contain a list
# of address ranges (CIDR blocks). The output will be a list of address which
# are in the first list but not the second expressed as /32 ranges.

from __future__ import unicode_literals

import sys
import ipaddress

jamesdavidson

/* Open a TLS connection to a remote host and verify its cert.
 * Usage: node tls_connect.js -connect thewest.com.au:443
 */
var tls = require('tls');

var i = process.argv.indexOf('-connect');
var connect = process.argv[1+i].split(':');
var servername = connect[0];
var port = Number(connect[1]);
if (0 < i && connect && servername && port) {

jamesdavidson

// ## Goal
//
// A convenient and secure way to get temporary credentials for AWS which I can use
// with Terraform or the Python CLI. Sort of like `saml2aws` but in the browser.
//
// ## Implementation
//
// A client-side JS app which uses Cognito and IAM resources as the backend.
//
// 1) Open the app