如何使我的应用程序在浏览器关闭时注销？

window.addEventListener('beforeunload', function (e) {
  // 发送注销请求到服务器
  fetch('/api/logout', { method: 'POST' })
    .then(response => {
      if (!response.ok) {
        throw new Error('Logout failed');
      }
    })
    .catch(error => {
      console.error('Logout error:', error);
    });
});

# 示例使用Flask框架
from flask import Flask, session, request
from datetime import timedelta

app = Flask(__name__)
app.secret_key = 'your_secret_key'

@app.before_request
def make_session_permanent():
    session.permanent = True
    app.permanent_session_lifetime = timedelta(minutes=30)

@app.route('/api/logout', methods=['POST'])
def logout():
    session.pop('user_id', None)
    return 'Logged out', 200