Handle IPv6 in isMovedError (#2981)

* Handle IPv6 in isMovedError

* Simplify GetAddr

---------

Co-authored-by: Monkey <golang@88.com>

error.go

@@ -7,6 +7,7 @@ import (
 	"net"
 	"strings"
 
+	"github.com/redis/go-redis/v9/internal"
 	"github.com/redis/go-redis/v9/internal/pool"
 	"github.com/redis/go-redis/v9/internal/proto"
 )
@@ -129,7 +130,9 @@ func isMovedError(err error) (moved bool, ask bool, addr string) {
 	if ind == -1 {
 		return false, false, ""
 	}
+
 	addr = s[ind+1:]
+	addr = internal.GetAddr(addr)
 	return
 }
 

internal/util.go

@@ -2,6 +2,7 @@ package internal
 
 import (
 	"context"
+	"net"
 	"strings"
 	"time"
 
@@ -64,3 +65,19 @@ func ReplaceSpaces(s string) string {
 
 	return builder.String()
 }
+
+func GetAddr(addr string) string {
+	ind := strings.LastIndexByte(addr, ':')
+	if ind == -1 {
+		return ""
+	}
+
+	if strings.IndexByte(addr, '.') != -1 {
+		return addr
+	}
+
+	if addr[0] == '[' {
+		return addr
+	}
+	return net.JoinHostPort(addr[:ind], addr[ind+1:])
+}

internal/util_test.go

@@ -51,3 +51,24 @@ func TestIsLower(t *testing.T) {
 		Expect(isLower(str)).To(BeTrue())
 	})
 }
+
+func TestGetAddr(t *testing.T) {
+	It("getAddr", func() {
+		str := "127.0.0.1:1234"
+		Expect(GetAddr(str)).To(Equal(str))
+
+		str = "[::1]:1234"
+		Expect(GetAddr(str)).To(Equal(str))
+
+		str = "[fd01:abcd::7d03]:6379"
+		Expect(GetAddr(str)).To(Equal(str))
+
+		Expect(GetAddr("::1:1234")).To(Equal("[::1]:1234"))
+
+		Expect(GetAddr("fd01:abcd::7d03:6379")).To(Equal("[fd01:abcd::7d03]:6379"))
+
+		Expect(GetAddr("127.0.0.1")).To(Equal(""))
+
+		Expect(GetAddr("127")).To(Equal(""))
+	})
+}