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@tomodian
tomodian / firehose-to-athena.js
Created February 28, 2017 15:22
Firehose to Athena
'use strict';
const aws = require('aws-sdk');
const s3 = new aws.S3({ apiVersion: '2006-03-01' });
exports.handler = (event, context, callback) => {
const key = decodeURIComponent(event.Records[0].s3.object.key);
const meta = key.split('/');
@sagivo
sagivo / gist:3a4b2f2c7ac6e1b5267c2f1f59ac6c6b
Last active May 29, 2024 13:06
webRTC stun / turn server list
to check if the server works - https://webrtc.github.io/samples/src/content/peerconnection/trickle-ice
stun:
stun.l.google.com:19302,
stun1.l.google.com:19302,
stun2.l.google.com:19302,
stun3.l.google.com:19302,
stun4.l.google.com:19302,
stun.ekiga.net,
stun.ideasip.com,
@joepie91
joepie91 / random.md
Last active May 19, 2024 18:16
Secure random values (in Node.js)

Not all random values are created equal - for security-related code, you need a specific kind of random value.

A summary of this article, if you don't want to read the entire thing:

  • Don't use Math.random(). There are extremely few cases where Math.random() is the right answer. Don't use it, unless you've read this entire article, and determined that it's necessary for your case.
  • Don't use crypto.getRandomBytes directly. While it's a CSPRNG, it's easy to bias the result when 'transforming' it, such that the output becomes more predictable.
  • If you want to generate random tokens or API keys: Use uuid, specifically the uuid.v4() method. Avoid node-uuid - it's not the same package, and doesn't produce reliably secure random values.
  • If you want to generate random numbers in a range: Use random-number-csprng.

You should seriously consider reading the entire article, though - it's

@erichsu
erichsu / recreate-docker-qcow2-file.sh
Last active July 6, 2021 17:45
Create limited size qcow2 image for Docker
#!/bin/sh
# brew install qemu
# stop Docker daemon
rm -rf ~/Library/Containers/com.docker.docker/Data/com.docker.driver.amd64-linux/Docker.qcow2
qemu-img create -f qcow2 -o lazy_refcounts ~/Library/Containers/com.docker.docker/Data/com.docker.driver.amd64-linux/Docker.qcow2 4G
# restart Docker daemon
# done...
# brew rmtree qemu
@oinopion
oinopion / read-access.sql
Created October 5, 2016 13:00
How to create read only user in PostgreSQL
-- Create a group
CREATE ROLE readaccess;
-- Grant access to existing tables
GRANT USAGE ON SCHEMA public TO readaccess;
GRANT SELECT ON ALL TABLES IN SCHEMA public TO readaccess;
-- Grant access to future tables
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO readaccess;
@lmmendes
lmmendes / elasticache_dump_to_rdb.md
Last active May 28, 2021 07:36
Save Amazon ElastiCache Redis to file dump.rdb

Instructions to DUMP localy a Elasticache Redis database

Connect to Redis CLI

$ redis-cli

Enable the current redis as a slave for the master node

@arikfr
arikfr / README.md
Last active May 16, 2024 16:28
Redash Query Export Tool

Setup

$ pip install click requests

Usage

$ python query_export.py --redash-url "https://app.redash.io/" --api-key ""
@paulirish
paulirish / what-forces-layout.md
Last active May 29, 2024 16:31
What forces layout/reflow. The comprehensive list.

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics
  • elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
@juliandunn
juliandunn / post-mortem-template.md
Created April 29, 2015 00:53
Post mortem template

INCIDENT DATE - INCIDENT TYPE

Meeting

Waiving meetings

In some cases the IC might determine that a PM meeting for the incident isn't needed. If the IC decides to waive the meeting please replace the Meeting section with a note indicating the meeting has been waived (example: Meeting waived: Paul Mooring)

@brianpetro
brianpetro / rails-4-new-options
Created April 28, 2015 18:11
Command line options for ` rails new --help ` (Rails 4.2). Useful for planning new Ruby on Rails app. 'Where can I find options for “rails new” command?'
Because I couldn't find these with a quick Google search on 28 April 2015:
Usage:
rails new APP_PATH [options]
Options:
-r, [--ruby=PATH] # Path to the Ruby binary of your choice
# Default: /home/brian/.rvm/rubies/ruby-2.2.0/bin/ruby
-m, [--template=TEMPLATE] # Path to some application template (can be a filesystem path or URL)
[--skip-gemfile], [--no-skip-gemfile] # Don't create a Gemfile