fixes #2491

app/logical/downloads/rewrite_strategies/base.rb

@@ -14,16 +14,21 @@ module Downloads
       end
 
     protected
-      def http_exists?(url, headers)
-        exists = false
+      def http_head_request(url, headers)
         uri = URI.parse(url)
         Net::HTTP.start(uri.host, uri.port) do |http|
           http.request_head(uri.request_uri, headers) do |res|
-            if res.is_a?(Net::HTTPSuccess)
-              exists = true
-            end
+            return res
           end
         end
+      end
+
+      def http_exists?(url, headers)
+        exists = false
+        res = http_head_request(url, headers)
+        if res.is_a?(Net::HTTPSuccess)
+          exists = true
+        end
         exists
       end
     end