var url = 'http://kkfile.shuran.cloud/file/test.txt'; //要预览文件的访问地址
window.open('http://kkfile.shuran.cloud/onlinePreview?url='+encodeURIComponent(base64Encode(url)));
var fileUrl =url1+"|"+"url2";//多文件使用“|”字符隔开
window.open('http://kkfile.shuran.cloud/picturesPreview?urls='+encodeURIComponent(base64Encode(fileUrl)));