fix(website): cast download polls render status as JSON, waits up to 30m - #3115
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Erik Osterman (Cloud Posse) (osterman) merged 3 commits intoSep 11, 2026
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…n a false-ready 2xx Downloading an unrendered cast landed on a blank "Cast artifact is not ready yet." page: the poll fetched the artifact URL without asking for JSON, so a still-rendering response could be misread as ready, and the 60s wait ceiling was far below real render times (up to ~30 min with queueing). Polling now asks for JSON, treats only a real 200 as ready (aborting before any bytes transfer), and waits up to 30 minutes, slowing its cadence past 13, while showing queued/rendering status and elapsed time inline.
Erik Osterman (Cloud Posse) (osterman)
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Erik Osterman (Cloud Posse) (osterman)
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Included review availability: Your plan provides up to 4 included reviews per hour; 2 remain after this review. 📝 WalkthroughWalkthroughThe change adds JSON artifact polling with wall-clock timeout enforcement. It integrates the poller with the React hook, adds queued and processing progress display, preserves cancellation and stale-request protection, and updates protocol documentation and tests. ChangesArtifact polling
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant CastProDownload
participant useCastArtifact
participant createPoller
participant ArtifactService
CastProDownload->>useCastArtifact: start artifact render
useCastArtifact->>createPoller: start(url)
createPoller->>ArtifactService: fetch artifact status
ArtifactService-->>createPoller: 202 or JSON 200 response
createPoller-->>useCastArtifact: report phase, progress, or error
useCastArtifact-->>CastProDownload: display status
createPoller-->>useCastArtifact: report ready
useCastArtifact-->>CastProDownload: navigate to forced download
Suggested labels: Merge Risk: ⚪ Minimal · up to The updated polling flow has no identified merge-blocking risk in the supplied evidence. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
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Inline comments:
In `@website/src/components/CastProArtifact/polling.mjs`:
- Line 124: Update the polling flow around the deadline timer and elapsedMs to
enforce the 30-minute limit using one monotonic start time rather than adding
poll intervals. Keep the remaining-budget abort active through response.json()
handling, including delayed 202 responses and hanging JSON bodies, and return
STILL_RENDERING_MESSAGE when the deadline expires. Add tests covering both
scenarios.
In `@website/src/components/CastProArtifact/useCastArtifact.ts`:
- Line 88: Update the URL-change effect in useCastArtifact so it resets the
polling state when starting a new URL, after cancelling the existing poller via
pollerRef. Preserve the existing initial polling behavior while ensuring stale
checking or rendering status cannot leave the new download button disabled.
- Line 106: Update the state merge in the useCastArtifact updater so terminal
updates clear the transient phase, progress, and slow fields when those values
are omitted, while preserving them for non-terminal updates. Use the existing
terminal-status indicator or update shape to distinguish terminal updates and
retain the current fields for ongoing polling.
In `@website/src/components/CastProDownload/index.tsx`:
- Around line 75-78: Add accessible progress semantics to the progress rendering
guarded by progressPercent, exposing both progress.stage and progressPercent
through a progress indicator or live status text. Do not rely on the title or
CSS width alone, and place the announcement outside the disabled button when
needed so assistive technology receives updates.
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📒 Files selected for processing (6)
website/src/components/CastProArtifact/README.mdwebsite/src/components/CastProArtifact/polling.mjswebsite/src/components/CastProArtifact/polling.test.mjswebsite/src/components/CastProArtifact/useCastArtifact.tswebsite/src/components/CastProDownload/index.tsxwebsite/src/components/CastProDownload/styles.module.css
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #3115 +/- ##
==========================================
- Coverage 83.98% 83.97% -0.01%
==========================================
Files 1995 1995
Lines 196406 196406
==========================================
- Hits 164942 164940 -2
- Misses 23416 23417 +1
- Partials 8048 8049 +1
Flags with carried forward coverage won't be shown. Click here to find out more. 🚀 New features to boost your workflow:
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…rom HTTP status The render service now answers a ready poll with JSON (data.artifacts[0].status === "ready") instead of the raw artifact bytes, and exposes CORS headers on error responses so 400/404/500 bodies are readable cross-origin. Update the 200 handling to branch on Content-Type and check the real readiness field (falling back to the old abort-without-reading behavior for any non-JSON 200), keeping the poller correct against the documented contract instead of an inference. No code change was needed for the error-readability part — interpretPollResponse already reads body.error — so this only adds test coverage for the 404 case.
…k button and stale progress Addresses CodeRabbit review on PR #3115: - The poller tracked elapsed time as a nominal poll-interval counter rather than real wall-clock time, so a slow round trip (or a hanging JSON body read) could let the next poll start with an almost-fresh 30-minute budget instead of being bounded by the real one. Elapsed time is now derived from an injectable monotonic clock, and the per-poll abort deadline now spans the JSON body read too. - Switching to a different cast mid-render (e.g. browsing to another file without unmounting CastProDownload) left the download button permanently disabled: the old poller was cancelled but its checking/rendering status was never reset for the new URL. - A terminal ready/error update no longer leaves a stale progress bar showing from the last rendering update. - The progress bar now exposes role=progressbar and aria-value* to assistive technology instead of relying on a title attribute alone.
Andriy Knysh (aknysh)
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Sep 11, 2026
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Erik Osterman (Cloud Posse) (osterman)
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Sep 11, 2026
…tration (cloudposse#3116) * fix(ci): cap concurrent subprocess launches in acceptance test orchestration This package's own test suite runs ~90 t.Parallel() subtests, many of which shell out to `go build`/`go test -c`/`go test`/precompiled test binaries via commandRunner. On a wide CI runner that lets dozens of real `go` toolchain subprocesses launch fully concurrently, which has triggered a Windows-only Go runtime GC/allocator crash ("fatal error: found pointer to free object" / "marked free object in span") during a concurrent os/exec process launch -- a long-standing, still-recurring class of Go runtime race under heavy concurrent allocation+syscall pressure on Windows (golang/go#44900, #45364, #47415, #54247), not anything specific to the command being run. Cap actual subprocess launches (not the surrounding parallel test logic) at a small constant via a package-level semaphore in commandRunner.run/output, and route testfixture_test.go's buildFixtureTestBinary through the same runner instead of a bare exec.Command so it shares the cap. Seen bouncing PR cloudposse#3115 from the merge queue twice for unrelated reasons; this specific crash was on the first attempt (windows, shard 3/10, run 34558935380). * fix(ci): scope the subprocess concurrency cap to Windows only The GC/allocator race this guards against (golang/go#44900, #45364, #47415, #54247) has only ever been reported on Windows -- capping subprocess launches on Linux/macOS too just serializes work on platforms that don't exhibit it, for no benefit. acquireSubprocessSlot is now a no-op unless runtime.GOOS == "windows", so Linux/macOS keep their full, uncapped concurrency (confirmed locally: this package's test suite dropped from ~15s to ~11.7s on macOS with the cap scoped out). * refactor(ci): move the Windows subprocess cap into a build-tagged file Splits the semaphore that caps concurrent subprocess launches on Windows (added in 66e50d4, scoped to Windows in 7231935) out of command.go's shared runtime.GOOS check into subprocess_cap_windows.go / subprocess_cap_other.go, matching this codebase's established *_windows.go/*_other.go build-tag convention (e.g. pkg/terraform/cache/trust_install_windows.go) instead of a runtime branch in shared code. Also adds the docs/fixes/ record for the whole fix (both prior commits plus this refactor), which was missing. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * test(ci): cover run/output's subprocess-slot error branches acquireSubprocessSlot's error path is only reachable on Windows (ctx done before a slot frees up); subprocess_cap_other.go's no-op always returns nil elsewhere, so run/output's `if err != nil` branches around it were structurally unreachable in a non-Windows test run. Codecov flagged this PR's patch coverage at 69.23% for exactly these two lines. Adds an acquireSubprocessSlotFunc seam (defaults to acquireSubprocessSlot) that command_test.go's two new tests override to force the error path on any platform, asserting run/output actually propagate it. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> --------- Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
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what
CastProArtifact/useCastArtifact.ts) to poll the render-status endpoint withAccept: application/jsoninstead of the raw artifact URL, and to treat only a genuine200response as "ready" — neverresponse.okon any 2xx.CastProArtifact/polling.mjs, with a companionpolling.test.mjscovering the queued→rendering→ready path, an immediate-ready response, terminal errors, the slowdown threshold, the wait ceiling, a hung fetch, and cancellation.CastProDownloadto show "Queued…"/"Rendering… m:ss" (with a "taking longer than usual" hint) and an optional progress bar, and updatedCastProArtifact/README.mdto document the render service's actual JSON/200/202/500 contract and the new polling cadence.why
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Summary by CodeRabbit
New Features
Documentation