Function handleDownloadDocument

apps/sim/app/api/tools/docusign/route.ts:505–589

(
  apiBase: string,
  headers: Record<string, string>,
  params: Record<string, unknown>,
  userId: string,
  signal?: AbortSignal
)

}

async function handleDownloadDocument(
  apiBase: string,
  headers: Record<string, string>,
  params: Record<string, unknown>,
  userId: string,
  signal?: AbortSignal
) {
  const { envelopeId, documentId } = params
  if (!envelopeId) {
    return NextResponse.json({ success: false, error: 'envelopeId is required' }, { status: 400 })
  }

  const docId = (documentId as string) || 'combined'

  const response = await fetchDocusign(
    `${apiBase}/envelopes/${(envelopeId as string).trim()}/documents/${docId}`,
    {
      headers: { Authorization: headers.Authorization },
    },
    signal
  )

  if (!response.ok) {
    let errorText = ''
    try {
      errorText = await readResponseTextWithLimit(response, {
        maxBytes: DEFAULT_MAX_ERROR_BODY_BYTES,
        label: 'DocuSign document error response',
      })
    } catch {
      // ignore
    }
    return NextResponse.json(
      { success: false, error: `Failed to download document: ${response.status} ${errorText}` },
      { status: response.status }
    )
  }

  const contentType = response.headers.get('content-type') || 'application/pdf'
  const contentDisposition = response.headers.get('content-disposition') || ''
  let fileName = `document-${docId}.pdf`

  const filenameMatch = contentDisposition.match(/filename[^;=\n]*=((['"]).*?\2|[^;\n]*)/)
  if (filenameMatch) {
    fileName = filenameMatch[1].replace(/['"]/g, '')
  }

  const buffer = await readResponseToBufferWithLimit(response, {
    maxBytes: MAX_DOCUSIGN_DOCUMENT_BYTES,
    label: 'DocuSign document download',
  })

  const workspaceId = typeof params.workspaceId === 'string' ? params.workspaceId : undefined
  const workflowId = typeof params.workflowId === 'string' ? params.workflowId : undefined
  const executionId = typeof params.executionId === 'string' ? params.executionId : undefined
  const legacyInlineContent =
    buffer.length <= MAX_LEGACY_INLINE_DOCUMENT_BYTES
      ? { base64Content: buffer.toString('base64') }