add mux config

handler/metrics/metadata.go

@@ -0,0 +1,22 @@
+package file
+
+import (
+	mdata "github.com/go-gost/core/metadata"
+	mdutil "github.com/go-gost/core/metadata/util"
+)
+
+const (
+	DefaultPath = "/metrics"
+)
+
+type metadata struct {
+	path string
+}
+
+func (h *metricsHandler) parseMetadata(md mdata.Metadata) (err error) {
+	h.md.path = mdutil.GetString(md, "metrics.path", "path")
+	if h.md.path == "" {
+		h.md.path = DefaultPath
+	}
+	return
+}