Универсальные фильтры

case

check_attr

delete_attrs

divide

format

map

match

multiply

reduce

set_tag

set_value

split

Специальные фильтры

encode_dhcp_options (только after)

render_reply (только after)

reject_on_error (!)

Автотесты

https://github.com/latera/hard/blob/master/conf/specs.yml.template

plugins:
  filters:
    set_value_before:
      fix_doubled_acct-session-id_attribute:
        condition: '   $context.has_tag?("accounting")
                   and $request.RAD_REQUEST.try("Acct-Session-Id", "").to_s() != $request.RAD_REQUEST.try("Acct-Session-Id", "")'
        destination: $request.RAD_REQUEST.Acct-Session-Id
        value_expression: $request.RAD_REQUEST.Acct-Session-Id[0]
        specs:
          - name: fix_doubled_acct-session-id_attribute
            input:
              tags: [accounting]
              request:
                RAD_REQUEST:
                  Acct-Session-Id:
                    - '5746ECB0-00000027'
                    - '5746ECB0-00000027'
            expected:
              tags: [accounting]
              request:
                RAD_REQUEST:
                  Acct-Session-Id: '5746ECB0-00000027'
          - name: pass_through_correct_acct-session-id_attribute
            input:
              tags: [accounting]
              request:
                RAD_REQUEST:
                  Acct-Session-Id: '5746ECB0-00000027'
            expected:
              tags: [accounting]
              request:
                RAD_REQUEST:
                  Acct-Session-Id: '5746ECB0-00000027' 

https://support.hydra-billing.com/discussions/topics/4000331784/