js微信打开连接数据库吗

// 前端代码
fetch('https://your-backend-api.com/data', {
    method: 'GET',
    headers: {
        'Content-Type': 'application/json'
    }
})
.then(response => response.json())
.then(data => console.log(data))
.catch(error => console.error('Error:', error));

# 后端代码（使用Flask框架）
from flask import Flask, jsonify
import sqlite3

app = Flask(__name__)

@app.route('/data', methods=['GET'])
def get_data():
    conn = sqlite3.connect('example.db')
    cursor = conn.cursor()
    cursor.execute('SELECT * FROM your_table')
    data = cursor.fetchall()
    conn.close()
    return jsonify(data)

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

// 前端代码
const socket = new WebSocket('wss://your-websocket-server.com');

socket.onmessage = function(event) {
    const data = JSON.parse(event.data);
    console.log(data);
};

# 后端代码（使用Flask-SocketIO）
from flask import Flask, jsonify
from flask_socketio import SocketIO, emit
import sqlite3

app = Flask(__name__)
socketio = SocketIO(app)

@socketio.on('connect')
def handle_connect():
    conn = sqlite3.connect('example.db')
    cursor = conn.cursor()
    cursor.execute('SELECT * FROM your_table')
    data = cursor.fetchall()
    conn.close()
    emit('data_update', {'data': data})

if __name__ == '__main__':
    socketio.run(app)