after.rb

def invoke(verb, path, expected_code, additional_params=nil)
  if additional_params
    response = RestClient.public_send(verb, restclient_uri(path), additional_params.to_json, core_params(verb))
  else
    response = RestClient.public_send(verb, restclient_uri(path), core_params(verb))
  end
rescue RestClient::Exception => e
  e
rescue
  response
else
  response.code == expected_code ? JSON.parse(response.to_str) : nil
end

def get(path)
  invoke(:get, path, 200)
end

def post(path, params)
  invoke(:post, path, 201, params)
end

def put(path, params)
  invoke(:put, path, 201, params)
end

def delete(path)
  invoke(:delete, path, 204)
end