如何将iFrame的内容插入到数据库中？

<iframe src="https://example.com" width="500" height="300"></iframe>

const express = require('express');
const bodyParser = require('body-parser');
const mysql = require('mysql');

const app = express();
app.use(bodyParser.urlencoded({ extended: true }));

// 创建数据库连接
const connection = mysql.createConnection({
  host: 'localhost',
  user: 'username',
  password: 'password',
  database: 'database_name'
});

// 处理POST请求，将iFrame内容插入数据库
app.post('/insert', (req, res) => {
  const iframeContent = req.body.iframeContent;

  // 执行数据库插入操作
  const query = 'INSERT INTO iframe_table (content) VALUES (?)';
  connection.query(query, [iframeContent], (error, results) => {
    if (error) throw error;
    res.send('iFrame内容已成功插入数据库！');
  });
});

// 启动服务器
app.listen(3000, () => {
  console.log('服务器已启动，监听端口3000...');
});

CREATE TABLE iframe_table (
  id INT AUTO_INCREMENT PRIMARY KEY,
  content TEXT
);