add limiterRefreshInterval option for limiter

connector/direct/metadata.go

@@ -0,0 +1,17 @@
+package direct
+
+import (
+	"strings"
+
+	mdata "github.com/go-gost/core/metadata"
+	mdutil "github.com/go-gost/x/metadata/util"
+)
+
+type metadata struct {
+	action string
+}
+
+func (c *directConnector) parseMetadata(md mdata.Metadata) (err error) {
+	c.md.action = strings.ToLower(mdutil.GetString(md, "action"))
+	return
+}