good-mitm/rules/map_modify.yaml

- name: "modify response header"
  filter:
    domain: '126.com'
  action:
    - modify-response:
        header:
          key: date
          value:
            origin: "2022"
            new: "1999"
    - modify-response:
        header:
          key: new-header-item
          value: Good-MITM
    - modify-response:
        header:
          key: server
          remove: true