Hadryan

import java.nio.charset.StandardCharsets;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.spec.InvalidKeySpecException;
import java.util.Arrays;
import java.util.Base64;

Hadryan

import javax.crypto.spec.SecretKeySpec
import javax.crypto.Cipher
import javax.crypto.spec.IvParameterSpec
import java.math.BigInteger
import javax.crypto.SecretKeyFactory
import java.security.MessageDigest
import javax.xml.bind.DatatypeConverter._

object Crypto extends App {
    

Hadryan

package ipfs;
import javax.crypto.*;
import javax.crypto.spec.SecretKeySpec;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.security.*;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.PKCS8EncodedKeySpec;

Hadryan

== Northwind Graph

=== Introduction

Recently, I was asked to pitch a method for providing recommendations.  Luckily, armed with the knowledge obtained from talks from Max De Marzi and [Mark Needham](https://skillsmatter.com/skillscasts/7298-modelling-a-recommendation-engine-a-worked-example) at a recent  Neo4j London Meetups, I knew this could be easily achieved with Neo4j.

The key issue with recommendation engines comes from the data.  Luckily, Neo4j comes bundled with the Northwind Graph Example.  The Northwind database is an infamous dataset containing purchase history that has been used to teach relational databases for years and was a great place to start.  You can import the Northwind database into a graph by following the ["Import Data into Neo4j"](http://neo4j.com/developer/guide-importing-data-and-etl/) post on Neo4j or type the following into Neo4j's browser at `http://localhost:7474/`

    :play northwind graph

Hadryan

{
  'id': '6818316025491246342',
  'desc': 'My 2015 moves still play in 2020�😂 #quarantinelife #throwback',
  'createTime': 1587512910,
  'video': {
    'height': 626,
    'width': 470,
    'duration': 11,
    'ratio': '480p
    'cover': 'https://p16.muscdn.com/obj/tos-maliva-p-0068/5951967888f341628c687b582f1970ac_1587512912',

Hadryan

require("isomorphic-fetch");

const query = JSON.stringify({
  query: `mutation {
    createChallenge(
      data: {
        title: "Nono"
        isPublished: true
        duration: 300
        sequence: {

Hadryan

const updateCountryFetch = async (countryId, happinessFactor, population) => {
  const query = JSON.stringify({
    query: `mutation {
          updateCountry(
            id: "${countryId}"
            happinessFactor: ${happinessFactor}
            population: ${population}) { id }
        }
    `
  });

Hadryan

var express = require('express')
  , jwtMiddleware = require('express-jwt')
  , bodyParser = require('body-parser')
  , cookieParser = require('cookie-parser')
  , cors = require('cors');
  
// We pass a secret token into the NodeJS process via an environment variable.
// We will use this token to sign cookies and JWTs
var SECRET_TOKEN = process.env.SECRET_TOKEN;

Hadryan

'use strict';

const crypto = require('crypto');

const AES_METHOD = 'aes-256-cbc';
const IV_LENGTH = 16; // For AES, this is always 16, checked with php

const password = 'lbwyBzfgzUIvXZFShJuikaWvLJhIVq36'; // Must be 256 bytes (32 characters)

function encrypt(text, password) {

Hadryan

rabbitmqctl add_user test test
rabbitmqctl set_user_tags test administrator
rabbitmqctl set_permissions -p / test ".*" ".*" ".*"