add reload and plugin support for hop

config/parsing/resolver/parse.go

@@ -0,0 +1,67 @@
+package resolver
+
+import (
+	"crypto/tls"
+	"net"
+	"strings"
+
+	"github.com/go-gost/core/logger"
+	"github.com/go-gost/core/resolver"
+	"github.com/go-gost/x/config"
+	"github.com/go-gost/x/internal/plugin"
+	"github.com/go-gost/x/registry"
+	xresolver "github.com/go-gost/x/resolver"
+)
+
+func ParseResolver(cfg *config.ResolverConfig) (resolver.Resolver, error) {
+	if cfg == nil {
+		return nil, nil
+	}
+
+	if cfg.Plugin != nil {
+		var tlsCfg *tls.Config
+		if cfg.Plugin.TLS != nil {
+			tlsCfg = &tls.Config{
+				ServerName:         cfg.Plugin.TLS.ServerName,
+				InsecureSkipVerify: !cfg.Plugin.TLS.Secure,
+			}
+		}
+		switch strings.ToLower(cfg.Plugin.Type) {
+		case "http":
+			return xresolver.NewHTTPPlugin(
+				cfg.Name, cfg.Plugin.Addr,
+				plugin.TLSConfigOption(tlsCfg),
+				plugin.TimeoutOption(cfg.Plugin.Timeout),
+			), nil
+		default:
+			return xresolver.NewGRPCPlugin(
+				cfg.Name, cfg.Plugin.Addr,
+				plugin.TokenOption(cfg.Plugin.Token),
+				plugin.TLSConfigOption(tlsCfg),
+			)
+		}
+	}
+
+	var nameservers []xresolver.NameServer
+	for _, server := range cfg.Nameservers {
+		nameservers = append(nameservers, xresolver.NameServer{
+			Addr:     server.Addr,
+			Chain:    registry.ChainRegistry().Get(server.Chain),
+			TTL:      server.TTL,
+			Timeout:  server.Timeout,
+			ClientIP: net.ParseIP(server.ClientIP),
+			Prefer:   server.Prefer,
+			Hostname: server.Hostname,
+		})
+	}
+
+	return xresolver.NewResolver(
+		nameservers,
+		xresolver.LoggerOption(
+			logger.Default().WithFields(map[string]any{
+				"kind":     "resolver",
+				"resolver": cfg.Name,
+			}),
+		),
+	)
+}