Evo Stamatov avioli

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.

[based on a true story]

So. Your friend's about to teach you how to make a website. Great!

You make a file, and you save it as 'index.html'. Why it's called 'index' isn't really explained to you, but whatever.

You type the following.

hello world

Setup SSH Authentication for Git Bash on Windows

Prepararation

Create a folder at the root of your user home folder (Example: C:/Users/uname/) called .ssh.
Create the following files if they do not already exist (paths begin from the root of your user home folder):

.ssh/config

Reduce boilerplate in Redux

Create actions similar to Flummox.
Generate action ids.
Supports actions with decorators, promises, and therefore ES7 async.

	/*

	Erica Sadun, http://ericasadun.com
	Cross Platform Defines

	Apple Platforms Only
	Will update to #if canImport() when available

	*/

	export const GoogleApi = function(opts) {
	opts = opts \|\| {}

	const apiKey = opts.apiKey;
	const libraries = opts.libraries \|\| [];
	const client = opts.client;
	const URL = 'https://maps.googleapis.com/maps/api/js';

	const googleVersion = '3.22';
	let script = null;

	/// This playground shows how to send and receive packets with low-level Posix UPD protocol API.

	import Foundation /// Used for NSUTF8StringEncoding
	import XCPlayground

	/// Ensure the playground doesn't stop executing at the end of the main thread.
	XCPlaygroundPage.currentPage.needsIndefiniteExecution = true

	/** Workaround for Swift not having access to the htons, htonl, and other C macros.
	This is equivalent to casting the value to the desired bitsize and then

	//LOAD CSV script for GFTS data
	create constraint on (a:Agency) assert a.id is unique;
	create constraint on (r:Route) assert r.id is unique;
	create constraint on (t:Trip) assert t.id is unique;
	create index on :Trip(service_id);
	create constraint on (s:Stop) assert s.id is unique;
	create index on :Stoptime(stop_sequence);
	create index on :Stop(name);

	schema await

	<?
	/////////////////////
	// slack2html
	// by @levelsio
	/////////////////////
	//
	/////////////////////
	// WHAT DOES THIS DO?
	/////////////////////
	//

	import test from 'tape';

	const before = test;
	const after = test;

	// beforeEach/afterEach rely on shared state.
	// That's a big anti-pattern for testing.

	// It's also silly to run something before and after
	// ever test -- many of your tests won't need it.