// 1. 重定向到授权页面
const authUrl = 'https://conn.nodeloc.cc/oauth2/auth?' + new URLSearchParams({
  response_type: 'code',
  client_id: 'YOUR_CLIENT_ID',
  redirect_uri: 'https://myapp.com/callback',
  scope: 'openid profile',
  state: 'random_state_string'
});

window.location.href = authUrl;

// 2. 处理回调，交换令牌
const response = await fetch('https://conn.nodeloc.cc/oauth2/token', {
  method: 'POST',
  headers: {
    'Authorization': 'Basic ' + btoa('CLIENT_ID:CLIENT_SECRET'),
    'Content-Type': 'application/x-www-form-urlencoded'
  },
  body: new URLSearchParams({
    grant_type: 'authorization_code',
    code: 'authorization_code_here',
    redirect_uri: 'https://myapp.com/callback'
  })
});

const tokens = await response.json();

// 3. 获取用户信息
const userResponse = await fetch('https://conn.nodeloc.cc/oauth2/userinfo', {
  headers: { 'Authorization': 'Bearer ' + tokens.access_token }
});

const userInfo = await userResponse.json();