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feat(rustproxy-http): add HTTP/2 auto-detection via ALPN with TTL-backed protocol cache and h1-only/h2 ALPN client configs

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Jürgen Kunz
2026-03-03 11:04:01 +00:00
parent e69de246e9
commit c52128f12d
10 changed files with 492 additions and 31 deletions
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changelog.md
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# Changelog
## 2026-03-03 - 25.9.0 - feat(rustproxy-http)
add HTTP/2 auto-detection via ALPN with TTL-backed protocol cache and h1-only/h2 ALPN client configs
- Add protocol_cache module: bounded, TTL-based cache (5min TTL), max entries (4096), background cleanup task and clear() to discard stale detections.
- Introduce BackendProtocol::Auto and expose 'auto' in TypeScript route types to allow ALPN-based protocol auto-detection.
- Add build_tls_acceptor_h1_only() to create a TLS acceptor that advertises only http/1.1 (used for backends/tests that speak plain HTTP/1.1).
- Add shared_backend_tls_config_alpn() and default_backend_tls_config_with_alpn() to provide client TLS configs advertising h2+http/1.1 for auto-detection.
- Wire backend_tls_config_alpn and protocol_cache into proxy_service, tcp_listener and passthrough paths; add set_backend_tls_config_alpn() and prune protocol_cache on route updates.
- Update passthrough tests to use h1-only acceptor to avoid false HTTP/2 detection when backends speak plain HTTP/1.1.
- Include reconnection/fallback handling and ensure ALPN-enabled client config is used for auto-detection mode.
## 2026-02-26 - 25.8.5 - fix(release)
bump patch version (no source changes)