The prior test drove the proxying app via Hono's in-process app.request()
harness, which has no real Node socket — so it could only assert the header
was non-empty-or-absent, not that the real client IP round-trips. Spin the
proxying app up with @hono/node-server (real loopback socket) and assert the
upstream actually receives 127.0.0.1/::1, exercising the same
remoteAddress lookup arenaProxy uses in production.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
- Forward client IP via x-forwarded-for/x-real-ip so the canonical arena's
per-IP rate limiting isn't collapsed to one bucket per node.
- 30s AbortSignal.timeout on non-stream requests; SSE fight streams
(/api/fights/:id/stream) are exempt (long-lived by design).
- On upstream fetch failure, log and return 502 {error} instead of a
buffered hang or a 500 stack trace.
- fights.ts: set X-Accel-Buffering: no on the SSE stream response so an
nginx-fronted arena (nginx-proxy-manager) doesn't buffer live fight events.
- docker-compose.yml: document ARENA_UPSTREAM_URL / TRUSTED_PROXY (commented,
no active value set here — the canonical arena gets its own compose file
in a later plan).
TDD: added the SSE/XFF/502 tests, confirmed the 502 test failed against the
prior implementation, then implemented to green (9/9 arena-proxy tests,
17/17 combined with rate-limit.test.ts).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Hono middleware that forwards /api/* to ARENA_UPSTREAM_URL when set, with
standalone mode (env unset) and /api/health untouched. Verified end-to-end
against a real second HTTP server: register a bot upstream, read it back
through the proxy, method/query/JSON body forwarded unchanged, inbound Host
header dropped, response content-encoding/content-length stripped.
TDD: 6 tests written first and confirmed failing (module didn't exist),
then implemented to green.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>