switch to httparty

app/logical/downloads/rewrite_strategies/base.rb

@@ -21,23 +21,12 @@ module Downloads
 
     protected
       def http_head_request(url, headers)
-        uri = URI.parse(url)
-        http = Net::HTTP.new(uri.host, uri.port)
-        if uri.scheme == "https"
-          http.use_ssl = true
-        end
-        http.request_head(uri.request_uri, headers) do |res|
-          return res
-        end
+        HTTParty.head(url, headers: headers)
       end
 
       def http_exists?(url, headers)
-        exists = false
         res = http_head_request(url, headers)
-        if res.is_a?(Net::HTTPSuccess)
-          exists = true
-        end
-        exists
+        res.success?
       end
     end
   end