Sinatra and cross-domain origins for local testing

gistfile1.rb

# If you have a local test environment with a server running on (say) http://localhost:8888/
# and are also using Sinatra running on http://localhost:4567/ then you will most likely run
# into cross-domain problems communicating between the two via JavaScript.  Here's a quick
# fix that will work beautifully for your local testing environment _but you should not use
# otherwise_!

require "sinatra"

before do
  headers "Access-Control-Allow-Origin" => "*"
end

get "/" do
  "Everything works like a charm now!"
end