如何获取图片的原始名称？

<input type="file" id="imageUpload" name="imageUpload">
<script>
document.getElementById('imageUpload').addEventListener('change', function(event) {
    var file = event.target.files[0];
    var originalName = file.name;
    console.log(originalName);
});
</script>

const express = require('express');
const multer = require('multer');
const upload = multer({ dest: 'uploads/' });

const app = express();

app.post('/upload', upload.single('image'), (req, res) => {
    console.log(req.file.originalname);
    res.send('File uploaded');
});

app.listen(3000, () => {
    console.log('Server started on port 3000');
});

from flask import Flask, request
import os

app = Flask(__name__)

@app.route('/upload', methods=['POST'])
def upload_file():
    if 'image' in request.files:
        file = request.files['image']
        original_name = file.filename
        file.save(os.path.join('uploads', original_name))
        return 'File uploaded'
    return 'No file part'

if __name__ == '__main__':
    app.run(port=3000)

<?php
if ($_FILES['image']['error'] === UPLOAD_ERR_OK) {
    $originalName = $_FILES['image']['name'];
    move_uploaded_file($_FILES['image']['tmp_name'], 'uploads/' . $originalName);
    echo 'File uploaded';
} else {
    echo 'Error uploading file';
}
?>