Module server 

Server accept loop, background tasks, and graceful shutdown.

Contains the runtime infrastructure that sits between the TCP listener and the per-request proxy pipeline. This module is intentionally decoupled from main() so that the server logic remains testable and reusable without pulling in process-level concerns like signal handling or std::process::exit.

Structs

ServerState

Runtime state shared across the accept loop.

Functions

serve

Accepts connections on listener, optionally wrapping each in TLS, and dispatches them through the proxy pipeline using the given client and shared state. Generic over the client connector type so that both plain-HTTP and HTTPS upstreams use the same accept loop.

shutdown_signal

Awaits a shutdown signal (SIGINT or SIGTERM on Unix, Ctrl+C on all platforms). Returns once the first signal is received.

spawn_health_checker

Spawns a background task that periodically probes each upstream backend at the configured health check path, updating health state based on HTTP response status.

spawn_rate_limit_cleanup

Spawns a background task that periodically prunes stale entries from the rate limiter, preventing unbounded memory growth.