arazzo: 1.0.1
info:
  title: Fastly Add a Header Rule
  summary: Clone the active version, add a header manipulation rule, then activate the new version.
  description: >-
    Header objects let Fastly add, modify, or remove HTTP headers as requests
    and responses flow through the edge. This workflow clones the live version
    into a draft, creates a header rule on the clone, and activates the new
    version so the rule takes effect. Every step spells out its request inline so
    the flow can be read and executed without opening the underlying OpenAPI
    description.
  version: 1.0.0
sourceDescriptions:
- name: servicesApi
  url: ../openapi/fastly-services-openapi.yml
  type: openapi
- name: vclServicesApi
  url: ../openapi/fastly-vcl-services-openapi.yml
  type: openapi
workflows:
- workflowId: add-header-rule
  summary: Clone a version, add a header rule, and activate the clone.
  description: >-
    Clones the supplied version, creates a header manipulation rule on the
    cloned version, and activates the clone.
  inputs:
    type: object
    required:
    - apiToken
    - serviceId
    - versionId
    - headerName
    - action
    - type
    - dst
    properties:
      apiToken:
        type: string
        description: The Fastly API token used to authenticate requests.
      serviceId:
        type: string
        description: The alphanumeric identifier of the service.
      versionId:
        type: integer
        description: The version number to clone.
      headerName:
        type: string
        description: A name for the header rule.
      action:
        type: string
        description: The header action to perform.
        enum:
        - set
        - append
        - delete
        - regex
        - regex_repeat
      type:
        type: string
        description: The processing phase the rule applies to.
        enum:
        - request
        - fetch
        - cache
        - response
      dst:
        type: string
        description: The name of the header to affect (the destination).
      src:
        type: string
        description: The source value or variable for the header.
  steps:
  - stepId: cloneVersion
    description: Clone the supplied version into a new editable draft version.
    operationId: cloneServiceVersion
    parameters:
    - name: Fastly-Key
      in: header
      value: $inputs.apiToken
    - name: service_id
      in: path
      value: $inputs.serviceId
    - name: version_id
      in: path
      value: $inputs.versionId
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      clonedVersion: $response.body#/number
  - stepId: createHeader
    description: Create the header manipulation rule on the cloned version.
    operationId: createHeader
    parameters:
    - name: Fastly-Key
      in: header
      value: $inputs.apiToken
    - name: service_id
      in: path
      value: $inputs.serviceId
    - name: version_id
      in: path
      value: $steps.cloneVersion.outputs.clonedVersion
    requestBody:
      contentType: application/x-www-form-urlencoded
      payload:
        name: $inputs.headerName
        action: $inputs.action
        type: $inputs.type
        dst: $inputs.dst
        src: $inputs.src
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      headerName: $response.body#/name
  - stepId: activateVersion
    description: Activate the cloned version so the header rule takes effect.
    operationId: activateServiceVersion
    parameters:
    - name: Fastly-Key
      in: header
      value: $inputs.apiToken
    - name: service_id
      in: path
      value: $inputs.serviceId
    - name: version_id
      in: path
      value: $steps.cloneVersion.outputs.clonedVersion
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      active: $response.body#/active
  outputs:
    clonedVersion: $steps.cloneVersion.outputs.clonedVersion
    headerName: $steps.createHeader.outputs.headerName
    active: $steps.activateVersion.outputs.active