ruby method issue

gistfile1.rb

# webrick.rb
require 'webrick'

WEBrick::HTTPUtils::DefaultMimeTypes['rhtml'] = 'text/html'

server = WEBrick::HTTPServer.new :Port => 3000, :DocumentRoot => Dir.pwd

trap 'INT' do server.shutdown end

server.start


# .rhtml - does not work
<%=
def broom
    return '3'
end

p broom
%>

# command line
def broom
    return '3'
end

puts broom