HTTP Transfers Releases

v5

5.0.0 - TBD

Fix iOS

Background NSUrlSession is no longer nulled out when the in-flight transfer count reaches zero. Dropping the reference without invalidating could lead to a duplicate-identifier crash (A background URLSession with identifier X already exists!) the next time a transfer was queued, or silently swap the delegate instance the system held.

Fix iOS

IHandleEventsForBackgroundUrl.Handle now compares the incoming sessionIdentifier against the manager’s session identifier (returning false on mismatch) and forces the NSUrlSession to materialize before storing the completion handler, so the delegate is wired up before the OS redelivers background events after a launch.

Rx removed. IHttpTransferManager no longer exposes WhenUpdateReceived(), WatchCount(), or any other IObservable<T> members. Subscribe to the new C# events UpdateReceived and CountChanged instead. WatchTransfer(identifier) now returns Task<HttpTransferResult> directly (await it, no Subscribe). The HttpClient.Upload/Download foreground helpers return Task and accept an Action<TransferProgress>? onProgress callback.

Enhancement

Non-iOS HTTP transfer processes consolidated into a single managed HttpClientHttpTransferProcess. Android, Windows, Linux, macOS, and plain .NET now share one driver; the platform-specific Android HttpTransferProcess and Windows HttpTransferProcess have been removed.

Feature

Plain .NET (base TFM) support — Shiny.Net.Http now ships a managed HttpClientHttpTransferManager for Linux, macOS, and any non-iOS/Android/Windows .NET host. Backed by HttpClient + IConnectivity, the loop wakes immediately on connectivity changes and supports resumable downloads via HTTP Range requests (206 Partial Content → FileMode.Append). Uploads always restart on failure. A default JSON filesystem repository is registered automatically so queued transfers survive process restarts. Cancelled downloads clean up partial files on disk. Register with services.AddHttpClientTransfers<TDelegate>(), and supply an IConnectivity implementation (e.g. AddConnectivity() from Shiny.Core.Linux or Shiny.Core.Blazor).

Enhancement Android

Background transfers now run on the same unified managed HttpClient + IConnectivity loop as the other non-iOS platforms (hosted inside the existing foreground service), bringing resumable downloads via HTTP Range requests to Android.

Feature

New Shiny.Net.Http.Blazor package — background HTTP transfers for Blazor WebAssembly using the Service Worker Background Sync API. Queued transfers are persisted to IndexedDB and drained by a Service Worker via fetch() even while the browser tab is closed (where supported). Download bodies are stored back in IndexedDB; the C# manager reconciles results and fires IHttpTransferDelegate callbacks when the tab reopens. Registered via services.AddBlazorHttpTransfers<TDelegate>(). Ship the bundled ./_content/Shiny.Net.Http.Blazor/http-transfer-sw.js SW or importScripts it from your own service worker. v1 limitations: downloads are not resumable (SW fetches return a whole Blob); upload bodies are base64-bridged through JS interop; Background Sync is Chromium-only (Firefox/Safari fall back to foreground drain).

Enhancement

RemoteFileName property on AzureBlobStorageUploadRequest allows overriding the uploaded file name

Enhancement

Azure Blob Storage URI now includes the file path

Enhancement

AWS S3 support added

v4

4.0.0 - March 26, 2026

Feature

Windows support added (No Background Support at this time)

Fix

HttpTransferMonitor now uses thread safe BindingList

Fix Android

File uploads now check to make sure file exists before queuing and downloads directories are checked to ensure they exist before queuing

Fix iOS

[GitHub #1580] by MarcelStommel

Send filenames with special characters properly and improved form data upload

Enhancement

Transfers can now be UploadMultipart, UploadRaw (body is raw bytes), or Download - this necessary for sending directly to Azure Blob Storage

Enhancement

AzureBlobStorageRequest.CreateForAzureBlobStorage static helper method

Enhancement

New HttpTransferDelegate allows you to set retries and detect denied authorization allowing you to refresh your token and issue a new request

v3

3.3.0 - March 18, 2024

Enhancement iOS

[GitHub #1411]

Allow fine tuned control of the nsurlsessionconfiguration and the mutable native request on iOS via implementing (& registering) INativeConfigurator

3.2.3 - January 18, 2024

Fix Android

[GitHub #1369] by berhir

Ensure HTTP transfer foreground service does start multiple times

Fix Android

Check for the presence of FOREGROUND_SERVICE_DATA_SYNC on API 34

3.1.0 - October 26, 2023

Fix Android

More aggressive retrying of transfers in queue

Fix Android

Appropriate amount of wizardary applied to remove foreground service notifications

3.0.1 - September 19, 2023

Fix

Race condition when subscribed to ShinySubject based subjects

3.0.0 - September 5, 2023

Enhancement

Rewritten API makes it easier than ever to monitor metrics of your transfers

Enhancement Android

Now supports persistent progress notifications

Enhancement

You can pass AppleHttpTransferRequest & AndroidHttpTransferRequest to the HttpTransferManager to customize the native request