From gekh's review of #768, each with a test that fails before:
- The routes refuse cross-site requests (sameSiteGated, as the paid
proxies do) and the tile route has a generous per-IP limit (600/min), so
another page cannot burn the token's quota or trip the shared 429 hold.
- At most six upstream fetches run at once; a queued request that is
abandoned never fetches, nor does one abandoned during the disk read.
- A body past the 48 MB cap aborts the upstream request as it streams.
- Empty tiles are charged against the memory and disk budgets.
- Each disk write uses its own temp file and a retrim is skipped while a
write of that tile is pending, so concurrent hits cannot extend a tile's
life or fail a rename.
- Upstream refusals other than 401/403/429 answer 502.
- The tile route's success path is tested end to end (200 with the image
layer stripped and the right headers, 204 when empty, an abandoned
response aborts upstream); the teardown race that made this file flaky
is gone (240 parallel runs, no failure); the QA-constant tautologies are
replaced by a check against the real provider registry; the boundary
group lists the modules the provider actually imports.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
