Sacha Arbonel sachaarbonel

## 0-rate-limiters.md

      
              7 files
            
          
              0 forks
            
          
              0 comments
            
          
              0 stars
            
          
                sachaarbonel
                / 0-rate-limiters.md
            
            
              Created
              December 11, 2021 14:12
                — forked from steve-chavez/0-rate-limiters.md
            
          
    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.

  
## flask_ajax.py
# Answer to a question on Flask mailing list
# http://librelist.com/browser//flask/2012/6/30/using-ajax-with-flask/
# NOTE: *REALLY* don't do the thing with putting the HTML in a global
#       variable like I have, I just wanted to keep everything in one
#       file for the sake of completeness of answer.
#       It's generally a very bad way to do things :)
#
from flask import (Flask, request, jsonify)

app = Flask(__name__)

## psuedo-catalogue.html
<h2> Purchasable APIs</h2>

<script>
window.onload = function() {

    $.ajax({
            type: "GET",
            url: "http://localhost:8080/public-apis/pub-catalogues",
            beforeSend: function()
            {

## change_notifier.dart
import 'observer_list.dart';

typedef VoidCallback = void Function();

class ChangeNotifier {
  ObserverList<VoidCallback> _listeners = ObserverList<VoidCallback>();

  bool get hasListeners {
    return _listeners.isNotEmpty;
  }

## ColorFilterGenerator.java
package com.example.app.myapplication;

import android.graphics.ColorFilter;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;

public class ColorFilterGenerator {

    private static double DELTA_INDEX[] = {
        0,    0.01, 0.02, 0.04, 0.05, 0.06, 0.07, 0.08, 0.1,  0.11,

## ffi.md

      
              1 file
            
          
              0 forks
            
          
              0 comments
            
          
              0 stars
            
          
                sachaarbonel
                / ffi.md
            
            
              Created
              May 5, 2020 23:37
                — forked from mraleph/ffi.md
            
          
    Dart VM FFI Vision

Background

The aim of Dart FFI project (tracked as Issue #34452) is to provide a low boilerplate, low ceremony & low overhead way of interoperating with native C/C++ code.
The motivation behind this project is twofold:

  
## _.js
// svgPathToCommands('M10,10 l 5,7 C-5,7.2,.3-16,24,10  z');
//
// produces:
//
// [ { marker: "M", values: [ 10, 10 ] },
//   { marker: "l", values: [ 5, 7 ] },
//   { marker: "C", values: [ -5, 7.2, 0.3, -16, 24, 10 ] },
//   { marker: "z", values: [ ] } ]
//
// commandsToSvgPath(svgPathToCommands('M10,10 l 5,7 C-5,7.2,.3-16,24,10  z'))

## graph-vis.html
<!DOCTYPE html>
<html>
    <head>
        <meta charset=utf-8 />
        <title>graph-vis</title>
    </head>
    <body>
        <canvas id="viewer" width="800" height="500"></canvas>
        <script src="graph-vis.js"></script>
    </body>

## price1.md

      
              1 file
            
          
              0 forks
            
          
              0 comments
            
          
              0 stars
            
          
                sachaarbonel
                / price1.md
            
            
              Created
              December 3, 2019 10:07
                — forked from GerardLutterop/price1.md
            
              
                Cost table additional work
              
          
Activity
Amount of work


Research
2–3 days


Design url’s, security
5–10 days


Build a prototype
3–5 days


Minimum viable product
5 days


Monitoring and alerting
2–3 days


Documentation (somebody will use your API!)
1–2 days


Selecting hosting, deployment
3–5 days


Deployment


## price2.md

      
              1 file
            
          
              0 forks
            
          
              0 comments
            
          
              0 stars
            
          
                sachaarbonel
                / price2.md
            
            
              Created
              December 3, 2019 09:59
                — forked from GerardLutterop/price2.md
            
              
                Cost table API, total cost
              
          
Activity
Amount of work


Research
3-6 days


Design url's, database, security
10-15 days


Build a prototype
5-8 days


Minimum viable product
5-10 days


Full product
10-20 days


Monitoring and alerting
3-5 days


Documentation (somebody will use your API!)
1-2 days


Selecting hosting, deployment
5-8 days
	# Answer to a question on Flask mailing list
	# http://librelist.com/browser//flask/2012/6/30/using-ajax-with-flask/
	# NOTE: REALLY don't do the thing with putting the HTML in a global
	# variable like I have, I just wanted to keep everything in one
	# file for the sake of completeness of answer.
	# It's generally a very bad way to do things :)
	#
	from flask import (Flask, request, jsonify)

	app = Flask(__name__)
	<h2> Purchasable APIs</h2>

	<script>
	window.onload = function() {

	$.ajax({
	type: "GET",
	url: "http://localhost:8080/public-apis/pub-catalogues",
	beforeSend: function()
	{
	import 'observer_list.dart';

	typedef VoidCallback = void Function();

	class ChangeNotifier {
	ObserverList<VoidCallback> _listeners = ObserverList<VoidCallback>();

	bool get hasListeners {
	return _listeners.isNotEmpty;
	}
	package com.example.app.myapplication;

	import android.graphics.ColorFilter;
	import android.graphics.ColorMatrix;
	import android.graphics.ColorMatrixColorFilter;

	public class ColorFilterGenerator {

	private static double DELTA_INDEX[] = {
	0, 0.01, 0.02, 0.04, 0.05, 0.06, 0.07, 0.08, 0.1, 0.11,
	// svgPathToCommands('M10,10 l 5,7 C-5,7.2,.3-16,24,10 z');
	//
	// produces:
	//
	// [ { marker: "M", values: [ 10, 10 ] },
	// { marker: "l", values: [ 5, 7 ] },
	// { marker: "C", values: [ -5, 7.2, 0.3, -16, 24, 10 ] },
	// { marker: "z", values: [ ] } ]
	//
	// commandsToSvgPath(svgPathToCommands('M10,10 l 5,7 C-5,7.2,.3-16,24,10 z'))
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset=utf-8 />
	<title>graph-vis</title>
	</head>
	<body>
	<canvas id="viewer" width="800" height="500"></canvas>
	<script src="graph-vis.js"></script>
	</body>
Activity	Amount of work
Research	2–3 days
Design url’s, security	5–10 days
Build a prototype	3–5 days
Minimum viable product	5 days
Monitoring and alerting	2–3 days
Documentation (somebody will use your API!)	1–2 days
Selecting hosting, deployment	3–5 days
Deployment
Activity	Amount of work
Research	3-6 days
Design url's, database, security	10-15 days
Build a prototype	5-8 days
Minimum viable product	5-10 days
Full product	10-20 days
Monitoring and alerting	3-5 days
Documentation (somebody will use your API!)	1-2 days
Selecting hosting, deployment	5-8 days