add observePeriod option for observer

handler/socks/v4/handler.go

@@ -14,9 +14,9 @@ import (
 	"github.com/go-gost/gosocks4"
 	ctxvalue "github.com/go-gost/x/ctx"
 	netpkg "github.com/go-gost/x/internal/net"
+	stats_util "github.com/go-gost/x/internal/util/stats"
 	"github.com/go-gost/x/limiter/traffic/wrapper"
 	"github.com/go-gost/x/registry"
-	stats_util "github.com/go-gost/x/internal/util/stats"
 	"github.com/go-gost/x/stats"
 	stats_wrapper "github.com/go-gost/x/stats/wrapper"
 )
@@ -218,7 +218,11 @@ func (h *socks4Handler) observeStats(ctx context.Context) {
 		return
 	}
 
-	ticker := time.NewTicker(5 * time.Second)
+	d := h.md.observePeriod
+	if d < time.Millisecond {
+		d = 5 * time.Second
+	}
+	ticker := time.NewTicker(d)
 	defer ticker.Stop()
 
 	for {

handler/socks/v4/metadata.go

@@ -8,17 +8,14 @@ import (
 )
 
 type metadata struct {
-	readTimeout time.Duration
-	hash        string
+	readTimeout   time.Duration
+	hash          string
+	observePeriod time.Duration
 }
 
 func (h *socks4Handler) parseMetadata(md mdata.Metadata) (err error) {
-	const (
-		readTimeout = "readTimeout"
-		hash        = "hash"
-	)
-
-	h.md.readTimeout = mdutil.GetDuration(md, readTimeout)
-	h.md.hash = mdutil.GetString(md, hash)
+	h.md.readTimeout = mdutil.GetDuration(md, "readTimeout")
+	h.md.hash = mdutil.GetString(md, "hash")
+	h.md.observePeriod = mdutil.GetDuration(md, "observePeriod")
 	return
 }