[RNE Rewrite] Integrate resource fetcher (react-native-blob-util)#1328
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msluszniak wants to merge 4 commits into
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[RNE Rewrite] Integrate resource fetcher (react-native-blob-util)#1328msluszniak wants to merge 4 commits into
msluszniak wants to merge 4 commits into
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Replace the temporary react-native-fs download hook with a single
blob-util-backed fetcher living in react-native-executorch (no separate
expo/bare packages).
- src/fetcher: imperative `download(source | source[], { onProgress, signal })`
returning local path(s); persistent DocumentDir cache keyed by URL hash.
- HTTP-Range auto-resume of interrupted downloads via a .partial file, with a
safe fallback to a fresh full download if partial assembly fails.
- Byte-weighted unified progress across multiple files; AbortSignal cancel that
preserves bytes for later resume.
- Bundled download telemetry (HF download counter + anonymous download event),
fired once per genuine, non-cached fetch.
- Rewire useResourceDownload + inspectModel onto the new fetcher; swap the
react-native-fs dependency for react-native-blob-util in the lib and example
apps.
Closes #1253
…tories Every create<Task> factory now runs its model/tokenizer path fields through the fetcher's download() before loading, so remote URLs are transparently downloaded and cached. Because download() passes local paths through untouched, the use<Task> hooks (which still pre-download for progress) hit an instant no-op — no double download, single telemetry event. - Wrap each loadModel/loadTokenizer arg with download() across all 12 factories (single modelPath, plus tokenizerPath and nested vadModel for the multi-file tasks). Whisper delegates VAD resolution to the FSMN factory. - Add a tuple-preserving download() overload so download([a, b]) resolves to [string, string] under noUncheckedIndexedAccess. - Imperative create<Task>(models.X) now works without an explicit download().
…large downloads On-device testing revealed react-native-blob-util's in-process streaming download is broken on modern Android (a 0.24.10 regression, upstream #475): it aborts after 8 KB with "Download interrupted", so every model download failed. curl and the system DownloadManager fetch the same URLs fine. Split the fetcher backend by platform: - Android: route through blob-util's system DownloadManager. It reliably handles files >2 GB (the whole point — LLM .pte files exceed the OkHttp 2 GB in-process limit), continues in the background / across app kill, and resumes transient network drops itself. Downloads stage in the app-private external files dir so DownloadManager can write there and the move into the cache stays on one volume (no multi-GB cross-filesystem copy). - iOS: keep the NSURLSession streaming path with .partial/HTTP-Range resume (unaffected by the Android regression, no 2 GB limit). Verified on a physical Android device: byte-weighted progress, cache-hit short-circuit, and create<Task>(models.X) URL resolution all pass end to end.
msluszniak
marked this pull request as draft
July 24, 2026 16:12
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Description
Main change: Adds resource fetching to the rewrite as a single
react-native-blob-util-backed fetcher insidereact-native-executorch(no separate expo/bare packages). Replaces the temporaryreact-native-fshook.API Description: Public
download(source | source[], { onProgress, signal })returns local path(s); local paths pass through untouched. Everycreate<Task>factory now resolves remote model URLs internally, socreate<Task>(models.X)works directly and theuse<Task>hooks (which pre-download for progress) hit an instant no-op. HF download-counter + download-event telemetry are bundled and fired once per genuine fetch.Important Note: Backend is split by platform: Android uses the system DownloadManager (reliable for files >2 GB, continues in the background, OS-managed resume), iOS streams via NSURLSession with
.partial/HTTP-Range resume.Introduces a breaking change?
Type of change
Tested on
Testing instructions
computer-visionexample app.createClassifier(models.classification.EFFICIENTNET_V2_S.XNNPACK_FP32)resolves the URL to a cached path internally.Screenshots
Related issues
Closes #1253
Checklist
Additional notes
LIB_VERSIONis hardcoded pending [RNE Rewrite] clang-tidy CI - drop RNET_BASE_URL test-release override once a real versioned release exists #1291.