constantine-nikolaou

# $ tweet Hi mom!
#
# Put this in ~/.bashrc or wherever.
# If it doesn't work, make sure your ~/.netrc is right
#
# (Thanks to @anildigital and @grundprinzip for curl-fu)

function tweet {
  curl -n -d status="$*" https://twitter.com/statuses/update.xml --insecure &> /dev/null
  echo "tweet'd"

constantine-nikolaou

You must be using git and capistrano to deploy your app. Capistrano will place a file in your Rails.root named 'REVISION'. Tested with the following capistrano setting:

set :scm, :git
set :deploy_via, :remote_cache

constantine-nikolaou

Rails 2.3.5 on App Engine¶ ↑

We assumed Rails 2 would never work without rubygems, and we committed to gem bunlder for JRuby on App Engine, so we were waiting for Rails 3. Fortunately, Takeru Sasaki was able to patch the Rails 2.3.5 calls to rubygems, and now we have it working. Rails 2.3.5 currently spins up several seconds faster than Rails 3, and just a few seconds behind Sinatra.

Install the Development Environment¶ ↑

The gems for the development environment include a pre-release appengine-tools gem that provides a pre-release version of jruby-rack.

sudo gem install google-appengine
sudo gem install appengine-tools --pre

constantine-nikolaou

<?php
class AccessComponent extends Object {
	public $settings = array();

	public $defaults = array(
		'admin_required' => array(),
		'auth_denied' => array(),
		'auth_required' => array(),
		'denied' => array(),
		'callback' => 'initialize');

constantine-nikolaou

require 'rubygems'
require 'sinatra'

require 'fileutils'

# upload with:
# curl -v -F "data=@/path/to/filename"  http://localhost:4567/user/filename

post '/:name/:filename' do
  userdir = File.join("files", params[:name])

constantine-nikolaou

# capistrano deployment

require "bundler/capistrano"
require "capistrano/ext/multistage"

set :stages, %w(canary production)
set :default_stage, "canary"

set :application, "lolcats"
set :deploy_to, "/srv/#{application}"

constantine-nikolaou

class CompressedRequests
  def initialize(app)
    @app = app
  end
  
  def call(env)
    if env['REQUEST_METHOD'] =~ /(POST|PUT)/ 
      if env.keys.include? 'HTTP_CONTENT_ENCODING'
        
        input = env['rack.input'].read

constantine-nikolaou

module Amazon
  module Authentication
    SIGNATURE_VERSION = "2"
    @@digest = OpenSSL::Digest::Digest.new("sha256")

    def sign(auth_string)
      Base64.encode64(OpenSSL::HMAC.digest(digester, aws_secret_access_key, auth_string)).strip
    end

    def digester

constantine-nikolaou

Here's how to install PostgreSQL and have it run automatically at startup, on an Ubuntu 10.04 virtual machine using Vagrant. This took me a while to figure out:

Add the default lucid32 base box to your vagrant, if you haven't already:

host> vagrant box add lucid32 http://files.vagrantup.com/lucid32.box 

Now make a new lucid32 virtual machine and install postgresql on it:

constantine-nikolaou

# install git
sudo apt-get install g++ curl libssl-dev apache2-utils
sudo apt-get install git-core
# download the Node source, compile and install it
git clone https://github.com/joyent/node.git
cd node
./configure
make
sudo make install
# install the Node package manager for later use