Burning Star

require 'cgi'

# This class is an example for a minimal app
# That can be used with the thin web server.
class MyApp

  STATUS_OK = 200

  STATUS_NOT_MODIFIED = 304

  STATUS_NOT_FOUND = 404

  STATUS_BAD_REQUEST = 400

  attr_accessor :content

  attr_accessor :status

  attr_reader :query

  # Prepares the resonse for thin server
  def send_response(response_status = STATUS_OK)

    @status = response_status

    headers = {
      'Content-Type'    => 'text/html; charset=utf-8',
      # NOTE: Use bytesize instead of size/length to get
      # the correct size for utf-8 chars, e.g. umlauts.
      'Content-Length'  => content.bytesize.to_s,
      'Server'          => 'My App Name'
    }

    # NOTE: If you collect the content as a String
    # you have to put it into an Array iteral so Thin
    # can iterate over it in Ruby 1.9
    response = [status, headers, [content]]

  end

  # Parses the query variables into a Hash.
  # Keys are always Strings.
  # Doublettes are joined into one String.
  def parse_query(query_string)
    begin

      uri_params = CGI.parse(query_string)

      @query = {}

      uri_params.each {|k, v|
        @query[k.to_sym] = v.join("")
      }

    rescue
      @query = {}
    end
  end

  # This method is invoked by thin at every request.
  def call(env)

    # parse query string
    parse_query env['QUERY_STRING']
    # reset content
    @content = ''

    @content << '######## ECHO START #########'
    @content << @query.to_s
    @content << '######## ECHO END #########'

    send_response

  end

end


app = Rack::Builder.new do
  
  use Rack::CommonLogger
  use Rack::ShowExceptions

  map "/" do
    use Rack::Lint
    run MyApp.new
  end
   
end

run app

# start with
# thin start -R my_rack_app.ru