repaired the wrong IP when using in localhost (Mac os x)

it returns “[“ when using beego in local host(Mac os x 10.9) , it
appears that Request.remoAddr returns “[::1]:****”

@@ -98,8 +98,10 @@ func (input *BeegoInput) IP() string {
 	}
 	ip := strings.Split(input.Request.RemoteAddr, ":")
 	if len(ip) > 0 {
+		if ip[0] != "["{
 			return ip[0]
 		}
+	}
 	return "127.0.0.1"
 }