Method RegisterServerNames

modules/caddytls/tls.go:666–698

RegisterServerNames registers the provided DNS names with the TLS app and associates them with the given HTTPS RR ALPN values, if any. This is currently used to auto-publish Encrypted ClientHello (ECH) configurations, if enabled. Use of this function by apps using the TLS app removes the need for th

(dnsNames, alpnValues []string)

//
// EXPERIMENTAL: This function and its semantics/behavior are subject to change.
func (t *TLS) RegisterServerNames(dnsNames, alpnValues []string) {
	t.serverNamesMu.Lock()
	defer t.serverNamesMu.Unlock()

	for _, name := range dnsNames {
		host, _, err := net.SplitHostPort(name)
		if err != nil {
			host = name
		}
		host = strings.ToLower(strings.TrimSpace(host))
		if host == "" || certmagic.SubjectIsIP(host) {
			continue
		}

		registration := t.serverNames[host]

		if len(alpnValues) == 0 {
			t.serverNames[host] = registration
			continue
		}

		if registration.alpnValues == nil {
			registration.alpnValues = make(map[string]struct{}, len(alpnValues))
		}
		for _, alpn := range alpnValues {
			if alpn == "" {
				continue
			}
			registration.alpnValues[alpn] = struct{}{}
		}
		t.serverNames[host] = registration
	}
}

func (t *TLS) alpnValuesForServerNames(dnsNames []string) map[string][]string {
	t.serverNamesMu.Lock()