arazzo: 1.0.1
info:
  title: Browserless Function Then Download
  summary: Use the function API to drive a page that triggers a file download, then retrieve the downloaded artifacts via the download API.
  description: >-
    A driven-download pipeline. The workflow first runs custom JavaScript via
    /chrome/function to prepare and navigate a page (for example, logging in or
    locating a downloadable resource), then runs /chrome/download with code that
    triggers the actual download and returns the downloaded file artifacts. The
    download API is purpose-built to capture files that a page emits to disk
    during automation. Every step spells out its token query parameter and
    request body inline so the flow can be read and executed without opening the
    underlying OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: browserlessApi
  url: ../openapi/browserless-openapi.yml
  type: openapi
workflows:
- workflowId: function-download
  summary: Prepare a page with a custom function, then trigger and retrieve a download.
  description: >-
    Runs a setup function via /chrome/function to ready the page, then runs
    /chrome/download with code that triggers the file download and returns the
    captured artifacts.
  inputs:
    type: object
    required:
    - token
    - setupCode
    - downloadCode
    properties:
      token:
        type: string
        description: The Browserless authorization token passed as a query parameter.
      setupCode:
        type: string
        description: JavaScript to prepare or navigate the page before downloading.
      downloadCode:
        type: string
        description: JavaScript that triggers the file download to be captured.
      context:
        type: object
        description: Optional context values passed into the executed functions.
  steps:
  - stepId: prepareFunction
    description: >-
      Run the setup JavaScript against a Browserless session to navigate to and
      prepare the page that will emit the download.
    operationPath: '{$sourceDescriptions.browserlessApi.url}#/paths/~1chrome~1function/post'
    parameters:
    - name: token
      in: query
      value: $inputs.token
    requestBody:
      contentType: application/json
      payload:
        code: $inputs.setupCode
        context: $inputs.context
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      result: $response.body
  - stepId: triggerDownload
    description: >-
      Run the download JavaScript, which triggers the file download. The
      response carries the captured downloaded artifacts.
    operationPath: '{$sourceDescriptions.browserlessApi.url}#/paths/~1chrome~1download/post'
    parameters:
    - name: token
      in: query
      value: $inputs.token
    requestBody:
      contentType: application/json
      payload:
        code: $inputs.downloadCode
        context: $inputs.context
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      download: $response.body
  outputs:
    setupResult: $steps.prepareFunction.outputs.result
    download: $steps.triggerDownload.outputs.download