Jimson and Sinatra playing together

jimson-sinatra.rb

require 'sinatra'
require 'jimson'

class Api
  extend Jimson::Handler
  def get_data
    {'foo' => 'bar'}
  end
end

get '/' do
  haml :index
end

post '/json-rpc' do
  Jimson::Server.new(Api.new).call(request.env)
end

__END__

@@ index
%html
  %head
    %title Hobo
    %script{ :type => 'text/javascript', :src => '//ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js' }
    :javascript
      $(document).ready(function(){
        $('#get-data').click(function(){
          $.post(
            '/json-rpc',
            JSON.stringify({method: 'get_data', id: 1, jsonrpc: '2.0'}),
            function(data){ $('#data').html(data.result.foo); },
            'json'
          );
        });
      });
  %body
    %p
      %input{ :type => 'button', :id => 'get-data', :value => 'Get Data' }
    #data No data yet!