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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.

@santhosh77h
santhosh77h / livestream
Created April 26, 2017 04:37 — forked from deandob/livestream
Node.JS function to remux mp4/h.264 video from an IP camera to a HTML5 video tag using FFMPEG
// Live video stream management for HTML5 video. Uses FFMPEG to connect to H.264 camera stream,
// Camera stream is remuxed to a MP4 stream for HTML5 video compatibility and segments are recorded for later playback
var liveStream = function (req, resp) { // handle each client request by instantiating a new FFMPEG instance
// For live streaming, create a fragmented MP4 file with empty moov (no seeking possible).
var reqUrl = url.parse(req.url, true)
var cameraName = typeof reqUrl.pathname === "string" ? reqUrl.pathname.substring(1) : undefined;
if (cameraName) {
try {
cameraName = decodeURIComponent(cameraName);
@santhosh77h
santhosh77h / gist:a1f225b91f800cf19dd09468acbd96f4
Created February 18, 2017 12:54 — forked from marty-wang/gist:5a71e9d0a6a2c6d6263c
Compile and deploy React Native Android app of Release version to device.
Disclaimer: The instructions are the collective efforts from a few places online.
Nothing here is my original. But I want to put them together in one place to save people from spending the same time as I did.
First off, bundle.
==================
1. cd to the project directory
2. Start the react-native packager if not started
3. Download the bundle to the asset folder:
curl "http://localhost:8081/index.android.bundle?platform=android" -o "android/app/src/main/assets/index.android.bundle"
@santhosh77h
santhosh77h / client.js
Created February 17, 2017 07:50 — forked from crtr0/client.js
A simple example of setting-up dynamic "rooms" for socket.io clients to join
// set-up a connection between the client and the server
var socket = io.connect();
// let's assume that the client page, once rendered, knows what room it wants to join
var room = "abc123";
socket.on('connect', function() {
// Connected, let's sign-up for to receive messages for this room
socket.emit('room', room);
});
@santhosh77h
santhosh77h / AesUtil.js
Created February 4, 2017 06:54 — forked from AndiDittrich/AesUtil.js
Node.js - AES Encryption/Decryption with AES-256-GCM using random Initialization Vector + Salt
/**
* AES Encryption/Decryption with AES-256-GCM using random Initialization Vector + Salt
* @type {exports}
*/
// load the build-in crypto functions
var crypto = require('crypto');
// encrypt/decrypt functions
module.exports = {