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@kixorz
kixorz / aws_autoscaling_cron.rb
Created March 20, 2013 22:41
Running cron jobs in AWS Auto Scaling group is tricky. When you deploy the same code and configuration to all instances in the group, cron job would run on all of them. You may not want that. This script detects the first instance in the group and allows only this instance to run the job. IAM user used by this script needs to have permissions to…
#!/usr/bin/env ruby
require 'syslog'
require 'net/http'
require 'aws-sdk'
Syslog.open
AWS.config({
:access_key_id => '<iam user key>',
:secret_access_key => '<iam user secret>'
@ryanb
ryanb / abilities.rb
Created September 15, 2012 19:23
How you can break up large Ability class in CanCan
module Abilities
def self.ability_for(user)
if user.admin?
AdminAbility.new(user)
else user
MemberAbility.new(user)
else
GuestAbility.new
end
end
@javan
javan / screenshot.js
Created June 19, 2012 21:40
Create a screenshot of any URL using phantomjs (headless webkit)
//
// Example usage: phantomjs screenshot.js http://yahoo.com /tmp/yahoo.png
//
var system = require('system');
var url = system.args[1];
var filename = system.args[2];
var page = new WebPage();
page.open(url, function (status) {
@cpatni
cpatni / app.rb
Created November 21, 2011 22:39
unique calculation using redis
require 'sinatra'
require 'redis'
require 'json'
require 'date'
class String
def &(str)
result = ''
result.force_encoding("BINARY")
# White-list based approach to only log what's relevant
# in Resque Hoptoad notifications.
#
# Disclaimer: this is provided as-is. Write your own tests.
# I can't be held responsible if this code still logs sensitive
# information into HopToad or contains bugs or whatever.
#
# This assume a single Hash arg for the Job. Example of use:
Resque::Failure::SensitiveHoptoad.configure do |config|