Test Service

Structurally validate a URL and probe it for reachability.

Tests the URL in the request body (typically unsaved), so an operator can verify before saving. The probe is a plain HTTP GET with a short timeout: any HTTP response means the host is reachable; a connection/timeout/DNS error means it is not. The operator is trusted (master key), so no SSRF deny-list applies; only the structural check (http/https + host) runs first.