javascript截取两个符号之间的字符串

    var ip = "rtsp://admin:abc123..@192.168.0.209/media/video1/multicast";
    //var ip = "192.168.0.210";
    console.log(getIpAddress(ip));
    function getIpAddress(ip) {
        var str = ip.split("@")
        if (str.length == 1) {
            return str[0];
        } else {
            var place = str[1].indexOf("/");
            return str[1].substring(0, place);
        }
    }