SMOODEV-948: Async auth-token provider across TS, Python, Rust, Go#72
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Only .NET shipped a first-class `AuthTokenProvider` delegate. The other four ports forced callers to wire auth either statically (`with_auth(string)`) or manually via a pre-request hook. Add a real async provider hook to each. TypeScript ---------- - `FetchBuilder.withAuthTokenProvider(provider, scheme = 'Bearer')`. - `PreRequestHook` return type widened to allow `Promise<...>` so the pipeline can `await` async hooks. The new builder method composes with any existing pre-request hook (hook runs first, Authorization injected after). - Export new `AuthTokenProvider` type. Python ------ - `FetchBuilder.with_auth_provider(provider, scheme='Bearer')`. - New `auth_token_provider` + `auth_scheme` fields on `FetchOptions`. - Provider may return `str` or an awaitable; the client awaits inline. Rust ---- - New `AuthTokenProvider` type alias (`Arc<dyn Fn() -> Pin<Box<dyn Future<Output=String>>>>`). - `FetchBuilder::with_auth_provider(provider, scheme)`. - `FetchClient` calls the provider before each `fetch()` / `fetch_with_options()` and injects the Authorization header into the merged init. Go -- - `AuthTokenProvider` type: `func(ctx context.Context) (string, error)`. - `ClientBuilder.WithAuthTokenProvider(provider, scheme)`. - Provider is invoked inside `executeHTTPRequest` after pre-request hook so cancellation/timeouts flow through; provider errors propagate via the PostResponseError hook chain. Tests ----- - TS: 4 new cases in `fetch.spec.ts` (sync, async, custom scheme, hook composition). - Python: new `test_auth_provider.py` with 5 cases. - Rust: new `auth_provider_tests.rs` with 3 cases. - Go: new `auth_provider_test.go` with 4 cases.
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…ejection, FastFirst (#75) Brings the .NET port closer to feature parity with the TS / Python / Rust / Go ports. Existing `SmooFetchOptions` + `SmooFetch.Create` factory remain for backwards compatibility — everything new is additive. New surface ----------- - `SmooFetchBuilder` (`SmooFetchBuilder.Create().With...().Build()`). - `LifecycleHooks` with `PreRequest`, `PostRequestOk`, `PostRequestErr`. - `CircuitBreakerOptions` + Polly v8 circuit breaker composed inside the resilience pipeline. Trips on the same predicates as the retry policy. - `OnRejectionCallback` / `OnRejectionDecision` (`Retry` / `RetryWithDelay` / `Abort` / `Skip` / `Default`) honored by the Polly `DelayGenerator`. - `RetryPolicy.FastFirst` — first retry fires with zero delay. - `RetryPolicy` converted to `record` so builder methods can use `with` to compose policies on the fly. Tests ----- New `SmooFetchBuilderTests` (7 cases) cover the builder happy path, PreRequest / PostRequestOk hook firing, the PostRequestErr documented behavior (only fires on transport-level throws, not HttpResponseError from the JSON reader), FastFirst skipping the initial backoff, OnRejection RetryWithDelay overriding the default delay, and the circuit breaker tripping after the failure threshold. Also included ------------- - `#[allow(dead_code)]` on `TestReply` in the Rust `auth_provider_tests.rs` added in PR #72 — the struct is only used as a `serde` deserialization target so cargo errors under `-D warnings` without the annotation. Out of scope (parked as follow-up) ---------------------------------- - Sliding-window rate limiter for .NET (callout from SMOODEV-946: "Rate limiter and FastFirst can ship as a follow-up if context is tight" — FastFirst is included; rate limiter is the only remaining gap). Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
Adds a first-class async auth-token provider to TS, Python, Rust, and Go (.NET already has one). The provider is invoked before every request to mint/refresh a token, with the result injected as the
Authorizationheader using a configurable scheme (defaultBearer).FetchBuilder.withAuthTokenProvider(provider, scheme?).PreRequestHookwidened to allow async returns so the pipeline can await hooks.FetchBuilder.with_auth_provider(provider, scheme='Bearer'). Provider may be sync or async.FetchBuilder::with_auth_provider(provider, scheme)withArc<dyn Fn() -> Pin<Box<dyn Future<Output=String>>>>.ClientBuilder.WithAuthTokenProvider(provider, scheme)withfunc(ctx context.Context) (string, error)— propagates context + errors.Test plan
pnpm exec vitest run(48 passed; 4 new)uv run pytest(118 passed; 5 new)cargo test(107 passed; 3 new)go test ./...(94 passed; 4 new)