tiennm99 3c1263add6 fix(canvas): make multi-chunk pixel writes atomic and refund cooldown on failure ...

- wrap writePixels in state.storage.transactionSync so a partial multi-chunk
  failure doesn't leave the canvas half-written or out of sync with the WS
  broadcast
- size new chunk buffer against chunkSize(chunkId) instead of the persisted
  blob's length so writes after a canvas-grow no longer silently drop OOB
  bytes in the formerly-last short chunk
- refund the cooldown row when writePixels throws so transient storage
  errors stop soft-DOSing the user (and halving image-uploader throughput)
- bound readAllChunks by chunk_id < CHUNK_COUNT and trim oversized blobs so
  orphan rows from a future shrink no longer crash GET /api/canvas
- require a positive Content-Length on /api/place (411) and reject above the
  pre-parse cap (413); previously a missing or zero header bypassed the cap
- drop String(err) from the 500 response body
- drain the INSERT cursor symmetrically with the UPDATE branch in tryAcquire
- assert CHUNK_BYTES <= 2 MB at module load (DO SQLite per-cell BLOB cap)
- correct the inverted webSocketClose comment and guard the re-close call
- add tests for missing / zero / oversized Content-Length

Plan: plans/260510-0232-fix-do-migration-followups/phase-01-do-storage-atomicity.md

2026-05-10 02:57:30 +07:00

..

phase-01-do-storage-atomicity.md

fix(canvas): make multi-chunk pixel writes atomic and refund cooldown on failure

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phase-02-cookie-ip-identity.md

fix(canvas): make multi-chunk pixel writes atomic and refund cooldown on failure

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phase-03-ws-hardening-client-race.md

fix(canvas): make multi-chunk pixel writes atomic and refund cooldown on failure

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phase-04-do-surface-tests.md

fix(canvas): make multi-chunk pixel writes atomic and refund cooldown on failure

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phase-05-docs-cleanup.md

fix(canvas): make multi-chunk pixel writes atomic and refund cooldown on failure

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plan.md

fix(canvas): make multi-chunk pixel writes atomic and refund cooldown on failure

2026-05-10 02:57:30 +07:00