add binder for connector

pkg/connector/relay/metadata.go

@@ -0,0 +1,36 @@
+package relay
+
+import (
+	"net/url"
+	"strings"
+	"time"
+
+	md "github.com/go-gost/gost/pkg/metadata"
+)
+
+type metadata struct {
+	connectTimeout time.Duration
+	user           *url.Userinfo
+	nodelay        bool
+}
+
+func (c *relayConnector) parseMetadata(md md.Metadata) (err error) {
+	const (
+		auth           = "auth"
+		connectTimeout = "connectTimeout"
+		nodelay        = "nodelay"
+	)
+
+	if v := md.GetString(auth); v != "" {
+		ss := strings.SplitN(v, ":", 2)
+		if len(ss) == 1 {
+			c.md.user = url.User(ss[0])
+		} else {
+			c.md.user = url.UserPassword(ss[0], ss[1])
+		}
+	}
+	c.md.connectTimeout = md.GetDuration(connectTimeout)
+	c.md.nodelay = md.GetBool(nodelay)
+
+	return
+}