Function parseSNIHosts

internal/config/client.go:258–288

parseSNIHosts parses the "sni" JSON field, which may be either a single string ("www.google.com") or an array (["www.google.com", "mail.google.com"]). Falls back to ["www.google.com"] when the field is absent or empty.

(raw json.RawMessage)

// string ("www.google.com") or an array (["www.google.com", "mail.google.com"]).
// Falls back to ["www.google.com"] when the field is absent or empty.
func parseSNIHosts(raw json.RawMessage) []string {
	if len(raw) == 0 {
		return []string{"www.google.com"}
	}
	// Try string first (backward-compatible single-SNI config).
	var single string
	if err := json.Unmarshal(raw, &single); err == nil {
		single = strings.TrimSpace(single)
		if single == "" {
			return []string{"www.google.com"}
		}
		return []string{single}
	}
	// Try array.
	var multi []string
	if err := json.Unmarshal(raw, &multi); err != nil {
		// Malformed — fall back to default and let the rest of validation catch it.
		return []string{"www.google.com"}
	}
	out := make([]string, 0, len(multi))
	for _, h := range multi {
		h = strings.TrimSpace(h)
		if h != "" {
			out = append(out, h)
		}
	}
	if len(out) == 0 {
		return []string{"www.google.com"}
	}
	return out
}

// LoadClient reads and validates a client config file.
func LoadClient(path string) (*Client, error) {