SlyDen

/**
* Copyright 2019 Google LLC.
* SPDX-License-Identifier: Apache-2.0
*/

function getEnvironment() {
 var environment = {
   spreadsheetID: "<REPLACE WITH YOUR SPREADSHEET ID>",
   firebaseUrl: "<REPLACE WITH YOUR REALTIME DB URL>"
 };

SlyDen

function getURLParameter(name) {
  var val = (RegExp('[?|&]' + name + '=' + '(.+?)(&|$)').exec(location.search)||[,null])[1];
  return val ? decodeURI(val) : val;
}

SlyDen

# NOT FOR SHELL SCRIPT, but rather just for quick copy paste 
# this is a copy-paste version with defaults of the full shell script docker-xenial.sh which is below this one in gist.

apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D && \
mkdir -p /etc/apt/sources.list.d && \
echo deb https://apt.dockerproject.org/repo ubuntu-xenial main > /etc/apt/sources.list.d/docker.list && \
service lxcfs stop && apt-get remove -y -q lxc-common lxcfs lxd lxd-client && \
apt-get update -q && apt-get upgrade -y -q && \
apt-get install -y -q docker-engine && \
mkdir -p /etc/systemd/system/docker.service.d && \

SlyDen

CREATE OR REPLACE FUNCTION notify_trigger() RETURNS trigger AS $$
	DECLARE
		channel_name varchar DEFAULT (TG_TABLE_NAME || '_changes');
	BEGIN
		IF TG_OP = 'INSERT' THEN
			PERFORM pg_notify(channel_name, '{"id": "' || NEW.id || '"}');
			RETURN NEW;
		END IF;
		IF TG_OP = 'DELETE' THEN
			PERFORM pg_notify(channel_name, '{"id": "' || OLD.id || '"}');

SlyDen

Client-side SSL

For excessively paranoid client authentication.

Using self-signed certificate.

Create a Certificate Authority root (which represents this server)

Organization & Common Name: Some human identifier for this server CA.

openssl genrsa -des3 -out ca.key 4096
openssl req -new -x509 -days 365 -key ca.key -out ca.crt

SlyDen

model() {
  let userPromise = this.store.findAll(‘user’);
  userPromise.catch((error) => {
    // transition to another route and show some error notification saying your team is doing their best to fix the problem
  });
  return userPromise; 
}

SlyDen

Ratpack Production Tunings

# cat /etc/security/limits.conf

*         hard    nofile      500000
*         soft    nofile      500000
root      hard    nofile      500000
root      soft    nofile      500000

SlyDen

import ratpack.exec.ExecController;
import ratpack.exec.Execution;
import ratpack.http.client.HttpClient;
import ratpack.server.RatpackServer;
import ratpack.service.Service;
import ratpack.service.StartEvent;
import ratpack.service.StopEvent;

import java.net.URI;
import java.util.Optional;

SlyDen

// app/models/product.js
export default DS.Model.extend({
  masterVariant: DS.belongsTo('product-variant'),
  variants: DS.hasMany('product-variant') // only contains the variants that are not master
});

// app/models/product-variant.js
export default DS.Model.extend({
  product: DS.belongsTo('product', { inverse: null }),
  master: DS.attr('boolean')

SlyDen

# to generate your dhparam.pem file, run in the terminal
openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048