网站授权域名

// 客户端代码
const authUrl = 'https://example.com/oauth/authorize?client_id=YOUR_CLIENT_ID&redirect_uri=https://yourapp.com/callback&response_type=code';

// 用户点击登录按钮后，跳转到授权页面
window.location.href = authUrl;

// 回调处理
app.get('/callback', (req, res) => {
    const { code } = req.query;
    // 使用 code 获取 access_token
    fetch('https://example.com/oauth/token', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/x-www-form-urlencoded'
        },
        body: `grant_type=authorization_code&code=${code}&redirect_uri=https://yourapp.com/callback&client_id=YOUR_CLIENT_ID&client_secret=YOUR_CLIENT_SECRET`
    })
    .then(response => response.json())
    .then(data => {
        const { access_token } = data;
        // 使用 access_token 获取用户信息
        fetch('https://example.com/api/userinfo', {
            headers: {
                'Authorization': `Bearer ${access_token}`
            }
        })
        .then(response => response.json())
        .then(userInfo => {
            // 处理用户信息
            console.log(userInfo);
        });
    });
});