class DatabaseController < ApplicationController
  def database_dump
    database = Rails.configuration.database_configuration[Rails.env]["database"]
    send_file_headers!(:type => 'application/octet-stream', :filename => "#{database}_#{Time.now.to_s(:human)}.backup")

    pipe = IO.popen("pg_dump '#{database}' -F c")
    stream = response.stream
    while (line = pipe.gets)
      stream.write line
      Thread.pass # per https://gist.github.com/njakobsen/6257887#gistcomment-1235792
    end
  rescue IOError
    # Client Disconnected
  ensure
    pipe.close
    response.stream.close
  end
  
  # Code that allows us to only mix in the live methods if we're accessing the desired action

  def dispatch(name, *args)
    extend ActionController::Live if name.to_s == 'database_dump'
    super
  end
end