colinjtsen2010 75516a220d fix: handle IPs, avoid wrong parent-domain lookups, cache whois results ...

- Bare IP addresses and non-domain hosts (localhost, IPv6) now return a
  null expiry instead of throwing, so they no longer spam error logs.
- Extract the registrable domain with tldts instead of walking up
  hostname labels, so a subdomain can never accidentally return its
  parent domain's expiry date.
- Cache WHOIS lookups per registrable domain (1h positive, 10min
  negative) so visiting details pages does not re-query the registry
  every time.

Addresses review feedback on #3834.

2026-08-13 12:02:49 +08:00

236 KiB

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