Simple "right here, right now" web server for testing static content

serve.ru

# Install dependencies:
#
#   gem install thin
#
# Run this to serve the current directory at http://localhost:3000/:
#
#   thin -R /path/to/serve.ru start
#

require 'rubygems'
require 'rack'
require 'rack/commonlogger'
require 'rack/conditionalget'
require 'rack/deflater'
require 'rack/directory'
require 'rack/etag'

DIR = File.expand_path('.')

class NoCache
  def initialize(app)
    @app = app
  end

  def call(env)
    status, headers, body = @app.call(env)
    headers['Cache-Control'] = 'must-revalidate'
    [status, headers, body]
  end
end

class Cache
  def initialize(app)
    @app = app
  end

  def call(env)
    status, headers, body = @app.call(env)

    headers['Cache-Control'] = 'max-age=315360000'
    headers['Expires']       = 'Fri, 01 May 2020 03:47:24 GMT'

    [status, headers, body]
  end
end

use Rack::CommonLogger
use Rack::ConditionalGet
use Rack::Deflater
use Rack::ETag

# Enable or disable caching as you wish.
use NoCache
# use Cache

map '/' do
  run Rack::Directory.new(DIR)
  puts "Serving all files under #{DIR}"
end