class Sinatra::Base

def run!(options={})

Thin, Mongrel or WEBrick (in that order)
Run the Sinatra app as a self-hosted server using 
def run!(options={})
  set options
  handler      = detect_rack_handler
  handler_name = handler.name.gsub(/.*::/, '')
  puts "== Sinatra/#{Sinatra::VERSION} has taken the stage " +
    "on #{port} for #{environment} with backup from #{handler_name}" unless handler_name =~/cgi/i
  handler.run self, :Host => bind, :Port => port do |server|
    [:INT, :TERM].each { |sig| trap(sig) { quit!(server, handler_name) } }
    set :running, true
  end
rescue Errno::EADDRINUSE => e
  puts "== Someone is already performing on port #{port}!"
end