add tun listener

pkg/listener/obfs/http/metadata.go

@@ -1,27 +1,26 @@
 package http
 
 import (
-	"fmt"
 	"net/http"
 
-	md "github.com/go-gost/gost/pkg/metadata"
+	mdata "github.com/go-gost/gost/pkg/metadata"
 )
 
 type metadata struct {
 	header http.Header
 }
 
-func (l *obfsListener) parseMetadata(md md.Metadata) (err error) {
+func (l *obfsListener) parseMetadata(md mdata.Metadata) (err error) {
 	const (
 		header = "header"
 	)
 
-	if mm, _ := md.Get(header).(map[interface{}]interface{}); len(mm) > 0 {
-		h := http.Header{}
+	if mm := mdata.GetStringMapString(md, header); len(mm) > 0 {
+		hd := http.Header{}
 		for k, v := range mm {
-			h.Add(fmt.Sprintf("%v", k), fmt.Sprintf("%v", v))
+			hd.Add(k, v)
 		}
-		l.md.header = h
+		l.md.header = hd
 	}
 	return
 }