fix: support multi address (apache#1306)

common/url.go

@@ -28,19 +28,17 @@ import (
 	"strings"
 	"sync"
 	"time"
-)
 
-import (
 	cm "github.com/Workiva/go-datastructures/common"
+
 	gxset "github.com/dubbogo/gost/container/set"
 	"github.com/jinzhu/copier"
+
 	perrors "github.com/pkg/errors"
-	"github.com/satori/go.uuid"
-)
 
-import (
 	"github.com/apache/dubbo-go/common/constant"
 	"github.com/apache/dubbo-go/common/logger"
+	uuid "github.com/satori/go.uuid"
 )
 
 // ///////////////////////////////
@@ -276,10 +274,13 @@ func NewURL(urlString string, opts ...Option) (*URL, error) {
 	s.Password, _ = serviceUrl.User.Password()
 	s.Location = serviceUrl.Host
 	s.Path = serviceUrl.Path
-	if strings.Contains(s.Location, ":") {
-		s.Ip, s.Port, err = net.SplitHostPort(s.Location)
-		if err != nil {
-			return &s, perrors.Errorf("net.SplitHostPort(url.Host{%s}), error{%v}", s.Location, err)
+	for _, location := range strings.Split(s.Location, ",") {
+		if strings.Contains(location, ":") {
+			s.Ip, s.Port, err = net.SplitHostPort(location)
+			if err != nil {
+				return &s, perrors.Errorf("net.SplitHostPort(url.Host{%s}), error{%v}", s.Location, err)
+			}
+			break
 		}
 	}
 	for _, opt := range opts {