Konstantinos Lypitkas klipitkas

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

openssl pkcs12 -in aps_cert.p12 -out aps_cert.pem

Using Mate DE and i3-gaps WM

May 4th 2017

This gist assumes:

you have a local git repo
with an online remote repository (github / bitbucket etc)
and a cloud server (Rackspace cloud / Amazon EC2 etc)
- your (PHP) scripts are served from /var/www/html/
- your webpages are executed by apache
apache's home directory is /var/www/

	// Controller method...
	public function download()
	{
	return response()->streamDownload(function () use ($invoice) {
	$token = config('services.cloudflare.api_token');
	$accountId = config('services.cloudflare.account_id');
	$cloudflareApi = 'https://api.cloudflare.com/client/v4';

	echo Http::withToken($token)
	->post($cloudflareApi.'/accounts/'.$accountId.'/browser-rendering/pdf', [

	<html>
	<body>
	<form>
	<input type="file" class="image" name="image">
	</form>
	<script>
	const image = document.querySelector('.image');

	const toBase64 = file => new Promise((resolve, reject) => {
	const reader = new FileReader();

	<?php

	define('CACHE_TIME_DEFAULT', 10000); // in seconds.

	function cache_get($key) {
	$path = sys_get_temp_dir() . "/cache-$key";
	if (!file_exists($path)) {
	return false;
	}
	$file = unserialize(file_get_contents($path));

	#!/bin/bash
	#
	# This script configures WordPress file permissions based on recommendations
	# from http://codex.wordpress.org/Hardening_WordPress#File_permissions
	#
	# Author: Michael Conigliaro <mike [at] conigliaro [dot] org>
	#

	WP_OWNER="$1" # <-- wordpress owner
	WP_GROUP=www-data # <-- wordpress group

	/**
	* Gravity Wiz // Gravity Forms // Limit Submissions Per Time Period (by IP, User, Role, Form URL, or Field Value)
	*
	* Limit the number of times a form can be submitted per a specific time period. You modify this limit to apply to
	* the visitor's IP address, the user's ID, the user's role, a specific form URL, or the value of a specific field.
	* These "limiters" can be combined to create more complex limitations.
	*
	* @version 2.15
	* @author David Smith <david@gravitywiz.com>
	* @license GPL-2.0+

	" Don't try to be vi compatible
	set nocompatible

	" Helps force plugins to load correctly when it is turned back on below
	filetype off

	" TODO: Load plugins here (pathogen or vundle)

	" Turn on syntax highlighting
	syntax on