Module metrics 

Prometheus metrics for tiny-proxy.

Opt-in via feature flag metrics. When disabled, all calls are no-ops.

Metrics exposed

Metric	Type	Labels
http_requests_total	counter	method, status, site
http_request_duration_seconds	histogram	method, status
http_active_requests	gauge	(none)
tls_handshakes_total	counter	status (ok / fail)

Usage

cargo run --features metrics -- --config config.conf --metrics-addr 127.0.0.1:9090
curl http://127.0.0.1:9090/metrics

Structs

MetricsGuard

RAII guard that tracks one in-flight request.

Functions

record_request

Record a completed HTTP request.

start_metrics_server

Start the Prometheus metrics HTTP server on the given address.

tls_handshake

Record a TLS handshake result.