fix peer config

cmd/gost/peer.go

@@ -19,9 +19,9 @@ const (
 )
 
 type peerConfig struct {
-	Strategy    string        `json:"strategy"`
-	MaxFails    int           `json:"max_fails"`
-	FailTimeout time.Duration `json:"fail_timeout"`
+	Strategy    string `json:"strategy"`
+	MaxFails    int    `json:"max_fails"`
+	FailTimeout time.Duration
 	period      time.Duration // the period for live reloading
 	Nodes       []string      `json:"nodes"`
 	group       *gost.NodeGroup

cmd/gost/route.go

@@ -59,9 +59,12 @@ func (r *route) parseChain() (*gost.Chain, error) {
 			gost.WithStrategy(gost.NewStrategy(nodes[0].Get("strategy"))),
 		)
 
-		cfg := nodes[0].Get("peer")
-		f, err := os.Open(cfg)
-		if err == nil {
+		if cfg := nodes[0].Get("peer"); cfg != "" {
+			f, err := os.Open(cfg)
+			if err != nil {
+				return nil, err
+			}
+
 			peerCfg := newPeerConfig()
 			peerCfg.group = ngroup
 			peerCfg.baseNodes = nodes

ws.go

@@ -716,6 +716,9 @@ func generateChallengeKey() (string, error) {
 	return base64.StdEncoding.EncodeToString(p), nil
 }
 
+// TODO: due to the concurrency control in the websocket.Conn,
+// a data race may be met when using with multiplexing.
+// See: https://godoc.org/gopkg.in/gorilla/websocket.v1#hdr-Concurrency
 type websocketConn struct {
 	conn *websocket.Conn
 	rb   []byte