mirror of https://github.com/garrytan/gstack.git
4bdb02070f
Closes #1244. The 429 handler in `generateVariant` discarded the `Retry-After` response header and fell straight through to a local exponential schedule (2s/4s/8s). In image-generation batches, that burns retry attempts inside the provider's cooldown window and the request never recovers. Now we parse `Retry-After` per RFC 7231 — both delta-seconds (`Retry-After: 5`) and HTTP-date (`Retry-After: Fri, 31 Dec 1999 23:59:59 GMT`). Honored waits are capped at 60s to bound stalls from hostile or buggy headers. Delta-seconds are validated as digits-only (rejects `2abc`). When `Retry-After` is honored (including 0 / past-date "retry now"), the next iteration's leading exponential sleep is skipped so we don't double-wait. Invalid or missing headers fall through to the existing exponential schedule unchanged. Behavior matrix: | Header | Behavior | |---------------------------------|-------------------------------------------| | Retry-After: 5 | wait 5s, skip leading on next attempt | | Retry-After: 999999 | capped to 60s, skip leading | | Retry-After: 2abc | invalid, fall through to exponential | | Retry-After: 0 | wait 0, skip leading (retry immediately) | | Retry-After: <past HTTP-date> | wait 0, skip leading | | Retry-After: <future date> | wait diff capped at 60s, skip leading | | no header | fall through to existing exponential | `generateVariant` now accepts an optional `fetchFn` parameter (defaults to `globalThis.fetch`) so tests can inject a stub. Production call sites are unchanged. Tests cover the five behavior buckets above, asserting both the 1st-to-2nd call timing gap and call counts. All five pass in ~8s. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> |
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| .. | ||
| feedback-roundtrip.test.ts | ||
| gallery.test.ts | ||
| serve.test.ts | ||
| variants-retry-after.test.ts | ||