Function validateFileReferenceShape

apps/sim/app/api/files/parse/route.ts:350–392

(filePath: string)

}

function validateFileReferenceShape(filePath: string): { isValid: boolean; error?: string } {
  const trimmed = filePath.trim()
  if (
    trimmed.startsWith('http://') ||
    trimmed.startsWith('https://') ||
    isInternalFileUrl(trimmed)
  ) {
    return { isValid: true }
  }

  if (trimmed.startsWith('data:')) {
    return {
      isValid: false,
      error: 'File input must be a URL or uploaded file reference, not inline file content',
    }
  }

  if (filePath.length > MAX_FILE_REFERENCE_LENGTH) {
    return {
      isValid: false,
      error: 'File reference is too long; provide a file URL or upload the file instead',
    }
  }

  if (/[\x00-\x08\x0B\x0C\x0E-\x1F]/.test(filePath)) {
    return {
      isValid: false,
      error:
        'File reference contains binary content; provide a file URL or upload the file instead',
    }
  }

  const newlineCount = filePath.match(/\r\n|\r|\n/g)?.length ?? 0
  if (newlineCount > 2) {
    return {
      isValid: false,
      error:
        'File reference looks like inline file content; provide a file URL or upload the file instead',
    }
  }

  return { isValid: true }
}

function parsedOutputTooLargeResponse(results?: unknown[]): NextResponse {
  const hasPartialResults = Boolean(results && results.length > 0)