Fix: dns msg to ip

dns/client.go

@@ -131,12 +131,14 @@ func (r *Resolver) resolveIP(m *D.Msg) (msg *D.Msg, err error) {
 			return nil, errors.New("GeoIP can't use")
 		}
 
-		ips, _ := r.msgToIP(res.Msg)
+		ips, err := r.msgToIP(res.Msg)
+		if err == nil {
 			if record, _ := mmdb.Country(ips[0]); record.Country.IsoCode == "CN" || record.Country.IsoCode == "" {
 				// release channel
 				go func() { <-fallbackMsg }()
 				msg = res.Msg
-			return
+				return msg, err
+			}
 		}
 	}
 
@@ -172,21 +174,13 @@ func (r *Resolver) msgToIP(msg *D.Msg) ([]net.IP, error) {
 	var ips []net.IP
 
 	for _, answer := range msg.Answer {
-		if r.ipv6 {
+		switch ans := answer.(type) {
-			ans, ok := answer.(*D.AAAA)
+		case *D.AAAA:
-			if !ok {
-				continue
-			}
 			ips = append(ips, ans.AAAA)
-			continue
+		case *D.A:
-		}
-
-		ans, ok := answer.(*D.A)
-		if !ok {
-			continue
-		}
 			ips = append(ips, ans.A)
 		}
+	}
 
 	if len(ips) == 0 {
 		return nil, errors.New("Can't parse msg")

hub/route/server.go

@@ -36,7 +36,7 @@ func Start(addr string, secret string) {
 
 	cors := cors.New(cors.Options{
 		AllowedOrigins: []string{"*"},
-		AllowedMethods: []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
+		AllowedMethods: []string{"GET", "POST", "PUT", "PATCH", "DELETE", "OPTIONS"},
 		AllowedHeaders: []string{"Content-Type", "Authorization"},
 		MaxAge:         300,
 	})