Function downloadFileContent

apps/sim/connectors/sharepoint/sharepoint.ts:129–155

* Downloads the text content of a drive item.

(
  accessToken: string,
  siteId: string,
  itemId: string,
  fileName: string
)

 * Downloads the text content of a drive item.
 */
async function downloadFileContent(
  accessToken: string,
  siteId: string,
  itemId: string,
  fileName: string
): Promise<string> {
  const url = `${GRAPH_BASE}/sites/${siteId}/drive/items/${itemId}/content`

  const response = await fetchWithRetry(url, {
    method: 'GET',
    headers: { Authorization: `Bearer ${accessToken}` },
    redirect: 'follow',
  })

  if (!response.ok) {
    throw new Error(`Failed to download file "${fileName}" (${itemId}): ${response.status}`)
  }

  // Stream with a hard byte cap so a file with missing/under-reported listing
  // size metadata is never fully buffered into memory. Oversized files are
  // skipped (returned empty) rather than indexed as truncated partial content.
  const buffer = await readBodyWithLimit(response, MAX_DOWNLOAD_SIZE)
  if (!buffer) {
    throw new ConnectorFileTooLargeError(MAX_DOWNLOAD_SIZE)
  }
  return buffer.toString('utf8')
}

/**
 * Fetches file content, applying HTML-to-text conversion for .html files.