David Collien dcollien

dcollien / ImageTools.es6

Last active April 30, 2026 15:31

Resize Images in the Browser

	let hasBlobConstructor = typeof(Blob) !== 'undefined' && (function () {
	try {
	return Boolean(new Blob());
	} catch (e) {
	return false;
	}
	}());

	let hasArrayBufferViewSupport = hasBlobConstructor && typeof(Uint8Array) !== 'undefined' && (function () {
	try {

dcollien / server.py

Last active August 29, 2015 14:26

Tornado HMAC Authenticated POST

	from tornado import web, ioloop, escape
	import hmac, hashlib

	SECRET = 'jGW7UPn8T1kpuNP1Op79YIL4Th4a5Cduebgta4riFE2zcAWAmhZToDmevmr4iLfO'

	def constant_time_compare(val1, val2):
	"""
	Returns True if the two strings are equal, False otherwise.

	The time taken is independent of the number of characters that match.

dcollien / pre-log.html

Created April 27, 2016 11:31

dcollien / package.json

Last active February 9, 2017 16:14

HTTP-ify anything: A server which executes commands.

	{
	"name": "http-exec",
	"version": "1.0.0",
	"description": "Command Execution Server",
	"main": "server.js",
	"scripts": {
	"test": "echo \"Error: no test specified\" && exit 1",
	"start": "node server.js"
	},
	"author": "David Collien",

dcollien / multipart.js

Last active July 17, 2024 03:47

Parse multi-part formdata in the browser

	var Multipart = {
	parse: (function() {
	function Parser(arraybuf, boundary) {
	this.array = arraybuf;
	this.token = null;
	this.current = null;
	this.i = 0;
	this.boundary = boundary;
	}

dcollien / wcag-contrast-ratio.js

Last active February 27, 2020 05:22

	const ContrastTools = {
	relLuminance(rgba) {
	// http://www.w3.org/TR/2008/REC-WCAG20-20081211/#relativeluminancedef
	var rgb = rgba.slice();

	for (var i = 0; i < 3; i++) {
	var channel = rgb[i] / 255;
	rgb[i] = channel < .03928 ? channel / 12.92 : Math.pow((channel + .055) / 1.055, 2.4);
	}

dcollien / list-rackspace-flavours.py

Created July 31, 2017 05:44

	#!/usr/bin/env python

	import pyrax

	pyrax.set_setting('identity_type', 'rackspace')
	pyrax.set_credentials(RACKSPACE_API_USER, RACKSPACE_API_KEY, region='SYD')

	def server_list_generator(detailed=True, search_opts=None, limit=None):
	servers = pyrax.cloudservers.servers.list(detailed=detailed,
	search_opts=search_opts,

dcollien / alphabeta.py

Last active August 18, 2017 09:41

	infinity = float("inf")

	def argmin(seq, fn):
	"""Return an element with lowest fn(seq[i]) score; tie goes to first one.
	>>> argmin(['one', 'to', 'three'], len)
	'to'
	"""
	best = seq[0]; best_score = fn(best)
	for x in seq:
	x_score = fn(x)

dcollien / websocket-python.js

Created November 9, 2017 16:31

	const WebSocket = require('ws');
	const PythonShell = require('python-shell');
	const tmp = require('tmp');
	const shortid = require('shortid');
	const fs = require('fs');
	const mkdirp = require('mkdirp');

	// TODO clean up code, error handling, watchdog timer

	const wss = new WebSocket.Server({ port: 8080 });

dcollien / config.py

Last active August 16, 2018 05:52

OAuth2.0 Sign-On for various providers, and retrieving user details: id, name, email, photo

	class Config(object):
	def __init__(self, **entries):
	self.__dict__.update(entries)
	self._entries = entries

	def __repr__(self):
	return "Config(%s)" % str(self._entries)

	def __getattr__(self, value):
	return None