file_saver 0.4.0 — streaming saves, and a memory-efficient downloadLink for large files
Just shipped 0.4.0 of file_saver. The package has been around a while but had one annoying limitation — every save loaded the full payload into Dart memory first. Fine for small files, painful for anything large.
This release fixes that and a bunch of other stuff that's been sitting in the issue tracker.
New APIs:
saveAsStream(Stream<List<int>>)— pipes straight to a temp file, then to the save dialog. Never touches the Dart heap.saveLinkAsStream(LinkDetails)— same idea but for authenticated URL downloads, with header support.downloadLink— hands the URL off to the browser on web, and to Android's native DownloadManager. Zero bytes through your isolate.
Other notable changes:
- Swift Package Manager support for iOS and macOS
- Path traversal hardening on Android
- Android writes moved off the main thread (no more frame drops on large saves)
- macOS save cancellation no longer hangs the platform call
- Windows invalid filename validation
- Native filePath copying on iOS/macOS/Windows — no more reading a file just to save it elsewhere
- Android Gradle/Kotlin/JVM/SDK bumped to current
Repo: https://github.com/incrediblezayed/file_saver Pub: https://pub.dev/packages/file_saver
Bug reports and PRs welcome — most of what's in this release came from people filing issues.
u/incredible_zayed — 6 days ago