在Node.js中使用Google API :避免重复授权

const { google } = require('googleapis');
const express = require('express');
const session = require('express-session');
const app = express();

// 配置会话
app.use(session({
  secret: 'your-secret',
  resave: false,
  saveUninitialized: true,
}));

// 创建OAuth 2.0客户端
const oauth2Client = new google.auth.OAuth2(
  'YOUR_CLIENT_ID',
  'YOUR_CLIENT_SECRET',
  'YOUR_REDIRECT_URL'
);

// 获取授权URL
app.get('/auth', (req, res) => {
  const authUrl = oauth2Client.generateAuthUrl({
    access_type: 'offline',
    scope: ['https://www.googleapis.com/auth/drive'],
  });
  res.redirect(authUrl);
});

// 处理授权回调
app.get('/auth/callback', async (req, res) => {
  const { code } = req.query;
  const { tokens } = await oauth2Client.getToken(code);
  oauth2Client.setCredentials(tokens);
  // 在这里可以保存访问令牌和刷新令牌，以便以后使用
  res.send('授权成功！');
});

// 使用Google API
app.get('/drive', async (req, res) => {
  const drive = google.drive({ version: 'v3', auth: oauth2Client });
  const response = await drive.files.list();
  res.json(response.data);
});

app.listen(3000, () => {
  console.log('应用程序已启动，监听端口3000');
});