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Add secure single-port HTTP proxy transport - #1594

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codex/http-transport
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Add secure single-port HTTP proxy transport#1594
BenCodez wants to merge 37 commits into
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codex/http-transport

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@BenCodez BenCodez commented Aug 31, 2026

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Summary

  • add BungeeMethod: HTTP as a bidirectional, outbound-backend transport using one proxy HTTPS port
  • automate a private CA, proxy TLS identity, node-bound one-time enrollment codes, per-backend client certificates, persistence, revocation, and certificate pinning
  • integrate the transport across Bungee/Velocity config, backend lifecycle, proxy routing, Control validation, vote handling, commands, and cleanup
  • add bounded long polling, persistent HTTP/1.1 connections, acknowledgements/deduplication, byte-budgeted batching, bounded queues/executors, admission/rate limits, and strict protocol parsing
  • document the quick setup and Internet-facing threat model in docs/http-transport.md

Easy setup

  1. Select HTTP on the proxy and set HTTP.PublicEndpoint.
  2. Open only the configured proxy port.
  3. Run /votingpluginbungee httpcode <server>.
  4. Paste the code into that backend's HTTP.ConnectionCode and restart it.
  5. Remove the temporary code after enrollment. The generated client identity is reused automatically.

Compromised or replaced nodes can be revoked with /votingpluginbungee httprevoke <server>.

Security

  • TLS 1.3 only, exact proxy/CA pins, hostname verification, certificate validity/signature/CA checks
  • client certificates bound to canonical backend identities and revalidated at the application boundary
  • 256-bit, 15-minute, single-use enrollment capabilities bound to one requested backend
  • owner-only atomic key, profile, binding, and revocation persistence where supported
  • fixed, bounded request bodies with request/response deadlines; no chunked uploads or redirects
  • exact endpoints/methods/content types, replay sequences, deduplication, and authenticated identity normalization
  • bounded connections, concurrent polls, worker queues, message queues, batches, packet bytes, and per-node request rates

The application cannot by itself prevent volumetric link/TCP floods; the documentation recommends host/provider firewall protection for Internet exposure and requires direct TLS pass-through.

Performance

  • all network and certificate work is off the game thread
  • reused HTTP/1.1 TLS connections
  • two-second bounded long polls for predictable backend-origin latency
  • message/ACK batching that splits on the fully serialized 256 KiB packet budget

Verification

  • GitHub Actions run 709: mvn -B -f VotingPlugin/pom.xml package passed
  • 546 tests passing with 0 failures/errors
  • focused Java 21 callback/backpressure/restart-dedup harness: passing
  • git diff --check: passing
  • independent concurrency/security/durability audit: clean after remediation

Delivery semantics

  • proxy-to-backend messages are durable on the proxy until a confirmed ACK
  • backends fsync bounded RESERVED, RUNNING, and COMPLETED delivery states around callbacks
  • reserved work resumes after restart; completed work is ACKed without replay; ambiguous running work remains quarantined and unacknowledged
  • completed states are removed only after a matching authenticated 200 proves durable proxy deletion
  • FIFO callback lanes remain bounded and apply backpressure at capacity
  • interrupted non-atomic state transitions recover conservatively without silently acknowledging unfinished work
  • backend-to-proxy delivery retains bounded in-process retry semantics

@BenCodez
BenCodez marked this pull request as ready for review August 31, 2026 22:33
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Review Status Commit Review trigger
📝 Code Review Completed 2026-09-02T03:49:47.553551Z e23a969 New commits
🔒 Security Review Completed 2026-09-01T00:12:47.280936Z 63e8f9d Manual request

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BenCodez commented Sep 1, 2026

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Comment thread VotingPlugin/src/main/java/com/bencodez/votingplugin/proxy/VotingPluginProxy.java Outdated

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try {
if (setup != null) try { setup.join(TimeUnit.SECONDS.toMillis(5)); }
catch (InterruptedException interrupted) { Thread.currentThread().interrupt(); }
if (active != null) active.close();

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P2 Badge Flush final presence messages before closing HTTP

During an orderly backend shutdown, BackendProxyHandler.close() first queues backendStopped (and shutdown-time logout messages) through the HTTP connector, but this path immediately calls active.close(), which stops the poller and discards its in-memory outgoing queue without a final bounded poll. Unless the message happened to enter an already-building request, a dedicated voting proxy retains the backend and its players until the 90-second presence timeout and can route online-only rewards toward a backend that has already stopped. Give the cleanup worker a bounded final flush before closing the connector.

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