attachment_engine 0.0.1-dev.1

Universal attachment engine for Flutter to resolve, cache, download, preview, and render documents, media, and web content using native platform APIs.

0.0.1-dev.1

Initial real release, after a full native rewrite and hardening pass.

• Fully-native platform channels for PDF, video, audio, webview, share, open-externally, download, and paths — no third-party plugin dependencies. Minimal pub deps: plugin_platform_interface, crypto, meta, equatable.
• Pure-Dart JSON-file metadata store and hand-written ZIP reader (no Hive/archive dependency).
• Attachment resolve → cache (LRU, checksum-verified) → download → render pipeline with in-flight request de-duplication and typed AttachmentFailures.
• HTTP range-based download resume on both platforms: Android (HttpURLConnection + Range header + .part.meta sidecar), iOS (URLSessionDownloadTask resume-data). Falls back to a clean full restart when the server/OS doesn't support resuming.
• HLS (.m3u8) adaptive playback works on both platforms via native APIs (AVPlayer on iOS, MediaPlayer on Android). DASH (.mpd) is not supported — documented limitation of avoiding ExoPlayer/Media3.
• Security: zip-slip-safe archive extraction, hashed (never raw) cache filenames, no URLs/tokens ever logged, stable cache identity independent of rotating signed URLs.
• Widgets: AttachmentTile, AttachmentErrorView, AttachmentList, AttachmentViewer.
• CI: GitHub Actions running format/analyze/test/Android build on ubuntu-latest and an iOS build job on macos-latest.