fail.rb

require 'rest-client'

API_KEY = "9lGH8iwbR9SKrVcKk"
END_POINT = "http://localhost:8080"

def make_url(path)
  "#{END_POINT}#{path}"
end

def post(path, params)
  RestClient.post make_url(path), params
end

response = post('/deals.json', {
  :api_key => API_KEY,
  :deal => {
    :name  => "a deal name",
  }
})