Function handleLocalFile

apps/sim/app/api/files/serve/[...path]/route.ts:161–218

(
  filename: string,
  userId: string,
  raw: boolean,
  versioned: boolean,
  signal: AbortSignal | undefined
)

)

async function handleLocalFile(
  filename: string,
  userId: string,
  raw: boolean,
  versioned: boolean,
  signal: AbortSignal | undefined
): Promise<NextResponse> {
  const ownerKey = `user:${userId}`
  try {
    const contextParam: StorageContext | undefined = inferContextFromKey(filename) as
      | StorageContext
      | undefined

    const hasAccess = await verifyFileAccess(
      filename,
      userId,
      undefined, // customConfig
      contextParam, // context
      true // isLocal
    )

    if (!hasAccess) {
      logger.warn('Unauthorized local file access attempt', { userId, filename })
      throw new FileNotFoundError(`File not found: ${filename}`)
    }

    const filePath = await findLocalFile(filename)

    if (!filePath) {
      throw new FileNotFoundError(`File not found: ${filename}`)
    }

    const rawBuffer = await readFile(filePath)
    const segment = filename.split('/').pop() || filename
    const displayName = stripStorageKeyPrefix(segment)
    const workspaceId = getWorkspaceIdForCompile(filename)
    const { buffer: fileBuffer, contentType } = await compileDocumentIfNeeded(
      rawBuffer,
      displayName,
      workspaceId,
      raw,
      ownerKey,
      signal
    )

    logger.info('Local file served', { userId, filename, size: fileBuffer.length })

    return createFileResponse({
      buffer: fileBuffer,
      contentType,
      filename: displayName,
      cacheControl: resolveServeCacheControl(versioned, contextParam),
    })
  } catch (error) {
    logger.error('Error reading local file:', error)
    throw error
  }
}