cggaurav

const encrypt = (text, email) => {

    const iv = crypto.randomBytes(IV_LENGTH)
    const cipher = crypto.createCipheriv('aes-256-cbc', new Buffer(ENCRYPTION_KEY), iv)
    let encrypted = cipher.update(text)

    encrypted = Buffer.concat([encrypted, cipher.final()])

    return `${iv.toString('hex')}:${encrypted.toString('hex')}`
}

cggaurav

    client.inboundDomains.list()
        .then((data) => {
            console.log('List of all inbound domains', data)
        })
        .catch((err) => {
            console.log('Whoops! Something went wrong')
            console.log(err)
        })

    client.inboundDomains.create({ domain: 'test.gratefuldiary.co'})

cggaurav

// original gist
const shuffleArray = arr => arr.sort(() => Math.random() - 0.5);

// fully random by @BetonMAN
const shuffleArray = arr => arr
  .map(a => [Math.random(), a])
  .sort((a, b) => a[0] - b[0])
  .map(a => a[1]);

shuffleArray([1, 2, 3]) //[3, 1, 2]

cggaurav

const encrypt = (text, email) => {

    const iv = crypto.randomBytes(IV_LENGTH)
    const cipher = crypto.createCipheriv('aes-256-cbc', new Buffer(ENCRYPTION_KEY), iv)
    let encrypted = cipher.update(text)

    encrypted = Buffer.concat([encrypted, cipher.final()])

    return `${iv.toString('hex')}:${encrypted.toString('hex')}`
}

cggaurav

Scaling your API with rate limiters

The following are examples of the four types rate limiters discussed in the accompanying blog post. In the examples below I've used pseudocode-like Ruby, so if you're unfamiliar with Ruby you should be able to easily translate this approach to other languages. Complete examples in Ruby are also provided later in this gist.

In most cases you'll want all these examples to be classes, but I've used simple functions here to keep the code samples brief.

Request rate limiter

This uses a basic token bucket algorithm and relies on the fact that Redis scripts execute atomically. No other operations can run between fetching the count and writing the new count.

cggaurav

// How Dropbox handles webhooks: https://www.dropbox.com/developers/reference/webhooks
  router.get('/api/dropbox/webhook', function (ctx, next) {
    return new HTTPRequest({ ctx }).handle((request) => {
      ctx.set('Content-Type', 'text/plain')
      ctx.set('X-Content-Type-Options', 'nosniff')
      ctx.body = request.data.challenge
    })
  })

cggaurav

/* =========================================
      IMPORTS
-------------------------------------- */

const fs = require('fs')
const { promisify } = require('util')

sleep = promisify(setTimeout)

cggaurav

/* =============================================
        Dependencies
------------------------------------------ */

const debug = require('debug')
const { Readable, Writable, Transform } = require('stream')

const JSONStream = require('JSONStream')

cggaurav

function worker (key, options = {}, work) {
    global.queues = global.queues || {}
    global.queues[key] = global.queues[key] || []
    global.queues[`${key}:active`] = global.queues[`${key}:active`] || []
    global.queues[`${key}:completed`] = global.queues[`${key}:completed`] || []
    global.queues[`${key}:failed`] = global.queues[`${key}:failed`] || []

    const queue = global.queues[key]

    this.jobs = this.jobs || 0

cggaurav

{
    "_id": {
        "$oid": "59fcba895d47ce19e4e653e0"
    },
    "AdvertiserName": "Century21",
    "Active": null,
    "Availability": "in-stock",
    "Category": "Men's Dress Shirt",
    "Currency": null,
    "EndDate": null,