configure rack attack to allow 5r/s for the load_url_title route

config/application.rb

@@ -26,6 +26,8 @@ module Metamaps
       Doorkeeper::ApplicationController.helper ApplicationHelper
     end
 
+    config.middleware.use Rack::Attack
+
     # Configure sensitive parameters which will be filtered from the log file.
     config.filter_parameters += [:password]
 

config/initializers/rack-attack.rb

@@ -0,0 +1,15 @@
+class Rack::Attack
+end
+
+Rack::Attack.cache.store = ActiveSupport::Cache::MemoryStore.new
+
+# Throttle requests to 5 requests per second per ip
+Rack::Attack.throttle('load_url_title/req/ip', :limit => 5, :period => 1.second) do |req|
+  # If the return value is truthy, the cache key for the return value
+  # is incremented and compared with the limit. In this case:
+  #   "rack::attack:#{Time.now.to_i/1.second}:load_url_title/req/ip:#{req.ip}"
+  #
+  # If falsy, the cache key is neither incremented nor checked.
+
+  req.ip if req.path === 'hacks/load_url_title'
+end