samarpanda

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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(function (context, trackingId, options) {
    const history = context.history;
    const doc = document;
    const nav = navigator || {};
    const storage = localStorage;
    const encode = encodeURIComponent;
    const pushState = history.pushState;
    const typeException = 'exception';
    const generateId = () => Math.random().toString(36);
    const getId = () => {

samarpanda

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2011 Jed Schmidt <http://jed.is>

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE

samarpanda

Synopsis

At the top of the file there should be a short introduction and/ or overview that explains what the project is. This description should match descriptions added for package managers (Gemspec, package.json, etc.)

Code Example

Show what the library does as concisely as possible, developers should be able to figure out how your project solves their problem by looking at the code example. Make sure the API you are showing off is obvious, and that your code is short and concise.

Motivation

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State Management Patterns

Repositories

Download the following repositories and run yarn install in each:

• Basic Counter
• Pizza Calculator
• Jetsetter
• Offices and Dragons

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var webpack = require('webpack');
var HtmlWebpackPlugin = require('html-webpack-plugin');
var path = require('path');
var folders = {
    APP: path.resolve(__dirname, '../app'),
    BUILD: path.resolve(__dirname, '../build'),
    BOWER: path.resolve(__dirname, '../bower_components'),
    NPM: path.resolve(__dirname, '../node_modules')
};

samarpanda

<script>
  window.Promise || document.write('<script src="https://unpkg.com/es6-promise@3.2.1/dist/es6-promise.min.js"><\/script>');
  window.fetch || document.write('<script src="https://unpkg.com/whatwg-fetch@1.0.0/fetch.js"><\/script>');
</script>

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for (var i = 0; i < 1024 * 1024; i++) {
  process.nextTick(function () { Math.sqrt(i) } )
}

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// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console

samarpanda

/*
 * Copyright (c) 2011, Yahoo! Inc.  All rights reserved.
 * Copyright (c) 2012, Log-Normal, Inc.  All rights reserved.
 * Copyright (c) 2014, SOASTA, Inc. All rights reserved.
 * Copyrights licensed under the BSD License. See the accompanying LICENSE.txt file for terms.
 */

/**
\file boomerang.js
boomerang measures various performance characteristics of your user's browsing