---
get:

  summary: Download

  tags:
    - Attachment

  description: |
    **Get the attachment's PDF file.**

    The optional `filename` parameter in the URL can be set to any valid file
    name. This allows you to download the file with user-specified file name in
    the browser.

  parameters:
    - name: attachment_id
      in: path
      type: integer
      format: int64
      required: true
      description: |
        Identifier for the attachment.
    - name: filename
      in: path
      type: string
      required: false
      description: |
        Optional filename parameter.

  responses:
    200:
      description: |
        The attachment's PDF file.