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Rails Lightweight Stack. Most of this is detailed on Crafting Rails Applications - http://pragprog.com/book/jvrails/crafting-rails-applications
# Run this file with:
#
# bundle exec RAILS_ENV=production rackup -p 3000 -s thin
#
# And access:
#
# http://localhost:3000/hello/world
#
# We are using Bundler in this example, but we could also
# have used rubygems:
#
# require "rubygems"
#
# gem "actionpack"
# gem "railties"
#
# require "rails"
# require "rails/all"
# The following lines should come as no surprise. Except by
# ActionController::Metal, it follows the same structure of
# config/application.rb, config/environment.rb and config.ru
# existing in any Rails 3 app. Here they are simply in one
# file and without the comments.
require "rails"
require "rails/all"
class MyApp < Rails::Application
routes.append do
match "/hello/world" => "hello#world"
end
# Enable cache classes. Production style.
config.cache_classes = true
# Here you could remove some middlewares, for example
# Rack::Lock, AD::Flash and AD::BestStandardsSupport below.
# The remaining stack is printed on rackup (for fun!).
# Rails 4 will have config.middleware.api_only! to get
# rid of browser related middleware.
config.middleware.delete "Rack::Lock"
config.middleware.delete "ActionDispatch::Flash"
config.middleware.delete "ActionDispatch::BestStandardsSupport"
# We need a secret token for session, cookies, etc.
config.secret_token = "49837489qkuweoiuoqwehisuakshdjksadhaisdy78o34y138974xyqp9rmye8yrpiokeuioqwzyoiuxftoyqiuxrhm3iou1hrzmjk"
end
# This is a barebone controller. One good reference can be found here:
# http://piotrsarnacki.com/2010/12/12/lightweight-controllers-with-rails3/
class HelloController < ActionController::Metal
include ActionController::Rendering
def world
render :text => "Hello world!"
end
end
# Initialize the app (originally in config/environment.rb)
MyApp.initialize!
# Print the stack for fun!
puts ">> Starting Rails lightweight stack"
Rails.configuration.middleware.each do |middleware|
puts "use #{middleware.inspect}"
end
puts "run #{Rails.application.class.name}.routes"
# Run it (originally in config.ru)
run MyApp
source :rubygems
# We are not loading Active Record, nor Active Resources etc.
# We can do this in any app by simply replacing the rails gem
# by the parts we want to use.
gem "actionpack", "~> 3.2"
gem "railties", "~> 3.2"
gem "tzinfo"
# Let's use thin
gem "thin"
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