fix proxy protocol

handler/ss/metadata.go

@@ -10,16 +10,19 @@ import (
 type metadata struct {
 	key         string
 	readTimeout time.Duration
+	hash        string
 }
 
 func (h *ssHandler) parseMetadata(md mdata.Metadata) (err error) {
 	const (
 		key         = "key"
 		readTimeout = "readTimeout"
+		hash        = "hash"
 	)
 
 	h.md.key = mdutil.GetString(md, key)
 	h.md.readTimeout = mdutil.GetDuration(md, readTimeout)
+	h.md.hash = mdutil.GetString(md, hash)
 
 	return
 }