gistfile1.rb

require 'rubygems'
require 'sinatra'
require 'json'
 
def json_get(route, options={}, &block)
  get(route, options) do 
    content_type 'text/json'
    block.call.to_json
  end
end
 
json_get '/' do
  {"bar" => "baz", "foo" => "bar"}
end