update_oai-pmh: make code DRY-er

scripts/update_oai-pmh.rb

@@ -16,21 +16,18 @@ def check_oai_pmh_endpoint(endpoint_url)
         response = HTTParty.head(queryIdentify_url)
 
         if !response.success?
-            print_with_time("Error: Identify response has HTTP status code #{response.code}.")
-            return "Error", []
+            raise StandardError.new "HTTP status code #{response.code}"
         end
 
         response = HTTParty.get(queryIdentify_url)
         if response.body.nil? || response.body.empty?
-            print_with_time("Error: Identify response is empty.")
-            return "Error", []
+            raise StandardError.new "empty entity"
         end
 
         xml_response = Nokogiri::XML(response.body)
         oai_pmh_tag = xml_response.at_xpath('//*[name()="OAI-PMH"]')
         if !oai_pmh_tag
-            print_with_time("Error: Identify response has no OAI-PMH tag.")
-            return "Error", []
+            raise StandardError.new "no OAI-PMH tag."
         end
 
         addresses = []