| --[[ |
| This wrapper modifies the hostname in the argument passed to the filter handler. |
| ]] |
| require 'attic_filter' |
| |
| function output_filter_wrapper(r) |
| -- copy the variables needed by attic_filter, overriding hostname |
| -- it's not possible to update hostname in the userdata (r), so we provide a replacment which uses the same syntax |
| s = {} |
| -- Copy across the items need by the filter. |
| s['content_type'] = r.content_type |
| s['hostname'] = os.getenv('VAR_NAME') or 'localhost' |
| -- For local debugging, also add the following: |
| s['warn'] = function(self, txt) r:warn(txt) end |
| s['info'] = function(self, txt) r:info(txt) end |
| -- Show that wrapper has been invoked |
| s:info("Wrapper: " .. s.hostname .. " " .. s.content_type) |
| output_filter(s) -- call with updated settings |
| end |
