openOpfsBytesFile function

Future<BytesFile> openOpfsBytesFile(String path, { bool create = true, bool readOnly = false, int chunkSize = kDefaultChunkSize, int? workers, })

Opens (or creates) a logical file backed by OPFS chunks.

• create: create an empty file when it does not exist (ignored when readOnly is true, matching dart:io's FileMode.read).
• readOnly: rejects every mutating call with a StateError.
• chunkSize: only used when the file is created; existing files keep the chunk size recorded in their manifest. Defaults to 16 MiB.
• workers: chunk workers in the page-wide pool; the first open wins. Defaults to OpfsWorkerPool.defaultWorkers.

Throws UnsupportedError when the browser has no OPFS / worker sync handle, WebFileSystemException with NotFoundError when create is false and the file is missing, and WebQuotaExceededException when the origin is full.

Implementation

Future<BytesFile> openOpfsBytesFile(
  String path, {
  bool create = true,
  bool readOnly = false,
  int chunkSize = kDefaultChunkSize,
  int? workers,
}) {
  return WebOpfsBytesFile.open(
    path,
    create: create,
    readOnly: readOnly,
    chunkSize: chunkSize,
    workers: workers,
  );
}