POST /api/users HTTP/1.1
Content-Type: application/x-www-form-urlencoded

data=%7B%22name%22%3A%22John%22%2C%22age%22%3A30%2C%22address%22%3A%7B%22city%22%3A%22New%20York%22%7D%7D

POST /api/users HTTP/1.1
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW

------WebKitFormBoundary7MA4YWxkTrZu0gW
Content-Disposition: form-data; name="json_data"

{"name":"John","age":30,"address":{"city":"New York"}}
------WebKitFormBoundary7MA4YWxkTrZu0gW--

POST /api/users HTTP/1.1
Content-Type: application/json

{"name":"John","age":30,"address":{"city":"New York"}}

// 使用FormData发送JSON数据
async function submitForm() {
  const formData = new FormData();
  const jsonData = {
    name: document.getElementById('name').value,
    age: document.getElementById('age').value,
    address: {
      city: document.getElementById('city').value
    }
  };
  
  formData.append('data', JSON.stringify(jsonData));
  
  try {
    const response = await fetch('/api/users', {
      method: 'POST',
      body: formData
    });
    const result = await response.json();
    console.log(result);
  } catch (error) {
    console.error('Error:', error);
  }
}

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

// 解析application/x-www-form-urlencoded
app.use(bodyParser.urlencoded({ extended: true }));

// 解析multipart/form-data
const multer = require('multer');
const upload = multer();

app.post('/api/users', upload.none(), (req, res) => {
  try {
    const jsonData = JSON.parse(req.body.data);
    console.log('Received data:', jsonData);
    
    // 处理数据...
    
    res.json({ success: true, data: jsonData });
  } catch (error) {
    res.status(400).json({ success: false, error: 'Invalid JSON data' });
  }
});

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

from flask import Flask, request, jsonify
import json

app = Flask(__name__)

@app.route('/api/users', methods=['POST'])
def handle_form():
    try:
        json_data = json.loads(request.form.get('data'))
        print("Received data:", json_data)
        
        # 处理数据...
        
        return jsonify({"success": True, "data": json_data})
    except json.JSONDecodeError:
        return jsonify({"success": False, "error": "Invalid JSON data"}), 400

if __name__ == '__main__':
    app.run(port=5000)