Billie Zhang billie66

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.

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	var React = require('react');
	var cx = require('classnames');
	var vjs = require('video.js');
	var _forEach = require('lodash/collection/forEach');
	var _debounce = require('lodash/function/debounce');
	var _defaults = require('lodash/object/defaults');

	var DEFAULT_HEIGHT = 800;
	var DEFAULT_WIDTH = 600;
	var DEFAULT_ASPECT_RATIO = (9 / 16);

	/* *******************************************************************************************
	* THE UPDATED VERSION IS AVAILABLE AT
	* https://github.com/LeCoupa/awesome-cheatsheets
	* ******************************************************************************************* */


	// 0. Synopsis.
	// http://nodejs.org/api/synopsis.html

	var mongoose = require('mongoose'),

	// Load User model
	User = mongoose.model('User'),

	// Create Thing schema
	thingSchema = new mongoose.Schema({

	_user: {
	type: ObjectId,

	/*
	For some reason, the change() event only fires when the input field loses focus.
	Binding to other options ('change keypress paste focus textInput input') will
	fire the event several times, which is bad. The below code works even when
	content is pasted into the text field, and only fires once as expected.
	*/
	$('#search-form .term').bind('input', function(){
	console.log('this actually works');
	});


	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<title>jQuery UI Autocomplete - Custom data and display</title>
	<link rel="stylesheet" href="../../themes/base/jquery.ui.all.css">
	<script src="../../jquery-1.6.2.js"></script>
	<script src="../../ui/jquery.ui.core.js"></script>
	<script src="../../ui/jquery.ui.widget.js"></script>

	/* The API controller
	Exports 3 methods:
	* post - Creates a new thread
	* list - Returns a list of threads
	* show - Displays a thread and its posts
	*/


	var Thread = require('../models/thread.js');
	var Post = require('../models/post.js');

	# app/validators/reserved_name_validator.rb
	class ReservedNameValidator < ActiveModel::EachValidator
	RESERVED_NAMES = %w{
	about account add admin api
	app apps archive archives auth
	blog
	config connect contact create
	delete direct_messages downloads
	edit email
	faq favorites feed feeds follow followers following

	# Rake task to launch multiple Resque workers in development/production with simple management included

	require 'resque/tasks' # Require Resque tasks

	namespace :workers do

	# = $ rake workers:start
	#
	# Launch multiple Resque workers with the Rails environment loaded,
	# so they have access to your models, etc.