Extract neopets_origin into a config value

app/services/neopets/custom_pets.rb

@@ -1,8 +1,9 @@
 require 'rocketamf_extensions/remote_gateway'
 
 module Neopets::CustomPets
-	NEOPETS_URL_ORIGIN = ENV['NEOPETS_URL_ORIGIN'] || 'https://www.neopets.com'
-	GATEWAY_URL = NEOPETS_URL_ORIGIN + '/amfphp/gateway.php'
+	GATEWAY_URL =
+		Addressable::URI.parse(Rails.configuration.neopets_origin) +
+		'/amfphp/gateway.php'
 	GATEWAY = RocketAMFExtensions::RemoteGateway.new(GATEWAY_URL)
 	CUSTOM_PET_SERVICE = GATEWAY.service('CustomPetService')
 	PET_SERVICE = GATEWAY.service('PetService')

config/application.rb

@@ -72,6 +72,12 @@ module OpenneoImpressItems
     # version number, etc. So let's only send this to Neopets systems, where it
     # should hopefully be clear who we are from context!
     config.user_agent_for_neopets = "Dress to Impress"
+
+    # Use the usual Neopets.com, unless we have an override. (At times, we've
+    # used this in collaboration with TNT to address the server directly,
+    # instead of through the CDN.)
+    config.neopets_origin =
+      ENV.fetch('NEOPETS_URL_ORIGIN', 'https://www.neopets.com')
   end
 end