add traffic limiter for proxy handler

config/parsing/limiter/parse.go

@@ -1,12 +1,16 @@
 package limiter
 
 import (
+	"crypto/tls"
+	"strings"
+
 	"github.com/go-gost/core/limiter/conn"
 	"github.com/go-gost/core/limiter/rate"
 	"github.com/go-gost/core/limiter/traffic"
 	"github.com/go-gost/core/logger"
 	"github.com/go-gost/x/config"
 	"github.com/go-gost/x/internal/loader"
+	"github.com/go-gost/x/internal/plugin"
 	xconn "github.com/go-gost/x/limiter/conn"
 	xrate "github.com/go-gost/x/limiter/rate"
 	xtraffic "github.com/go-gost/x/limiter/traffic"
@@ -17,6 +21,30 @@ func ParseTrafficLimiter(cfg *config.LimiterConfig) (lim traffic.TrafficLimiter)
 		return 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 xtraffic.NewHTTPPlugin(
+				cfg.Name, cfg.Plugin.Addr,
+				plugin.TLSConfigOption(tlsCfg),
+				plugin.TimeoutOption(cfg.Plugin.Timeout),
+			)
+		default:
+			return xtraffic.NewGRPCPlugin(
+				cfg.Name, cfg.Plugin.Addr,
+				plugin.TokenOption(cfg.Plugin.Token),
+				plugin.TLSConfigOption(tlsCfg),
+			)
+		}
+	}
+
 	var opts []xtraffic.Option
 
 	if cfg.File != nil && cfg.File.Path != "" {