Node.js——异步上传文件

submit() {
    var file = this.$refs.fileUpload.files[0];
    var formData = new FormData();
    formData.append("file", file);
    formData.append("username", this.username);
    formData.append("password", this.password);
    axios.post("http://127.0.0.1:3000", formData).then(res => {
    console.log(res);
    });
}

app.use(function (req, res) {
    var form = new formidable.IncomingForm();
    form.uploadDir = path.join(__dirname, ‘uploads‘)

    form.parse(req, function (err, fields, files) {
        fs.rename(files.file.path, path.join(__dirname, ‘uploads‘, files.file.name), function (err) {
            if (!err) {
                return res.end(‘ok‘)
            }
            res.end(‘err‘)
        })
    });
})