使用Express从目录中获取所有文件

Question

在angular中，我向正文添加了file's，他们使用express上传了它们。但是我真的很想再次将文件移出目录。

这是我发送请求的angular code：

addSongFilesToServer(title, lrc, txt, thumb, mp3instrumental) {
    let url = this._config.ServerWithApiUrl + "uploadFiles";
    let body : FormData = new FormData();
    body.append('txt', txt, "pitches.txt");
    body.append('lrc', lrc, "lyric.lrc");
    body.append('thumb', thumb, "thumbnail.png");
    body.append('mp3instrumental', mp3instrumental, "instrumental.mp3");

    this._config.headers.delete('Content-Type');

    return this._http.post(url, body, { headers: this._config.headers })
        .map(res => res.json()).catch(function(err){
            throw err;
    });
}

然后使用express上传它们：

var Router = express.Router();

Router.post('/uploadFiles', (req, res) => {

        var title = this.lastTitle;

        var storage = multer.diskStorage({
            destination: function (req, file, cb) {
                var dir = "../songs/" + title;
                if (!fs.existsSync(dir)){
                    fs.mkdirSync(dir);
                }
                cb(null, dir);
            },
            filename: function (req, file, cb) {
                cb(null, file.originalname);
            }
        });

       this.lastTitle = "";

        var upload = multer({ storage : storage}).any();
        upload(req,res,function(err){            
            if(err){            
                return res.status(500).send({ 
                    code: 500, message: 'could not upload file: ' + err, error: err });
            }else {
                return res.status(200).send({ 
                    code: 200, message: 'All files uploaded!', err: ""});
            }                     
        });       
    });

现在，我需要一种类似的方法来GET´ me all of the files into a列出or variables. I need to get all of the files in one specific folder, which name would be标题`。并把它们全部作为回应。
我该怎么办？