客户端：
使用auth2init函数，您可以传递hosted_domain参数以将登录弹出窗口中列出的帐户限制为与您的帐户匹配的帐户hosted_domain。您可以在以下文档中看到此内容：https : //developers.google.com/identity/sign-in/web/reference
服务器端：
即使具有受限的客户端列表，您也需要验证id_token与指定的托管域匹配。对于某些实现，这意味着hd在验证令牌后检查从google获得的属性。
全栈示例：
网页代码：
gapi.load('auth2', function () {
// init auth2 with your hosted_domain
// only matching accounts will show up in the list or be accepted
var auth2 = gapi.auth2.init({
client_id: "your-client-id.apps.googleusercontent.com",
hosted_domain: 'your-special-domain.com'
});
// setup your signin button
auth2.attachClickHandler(yourButtonElement, {});
// when the current user changes
auth2.currentUser.listen(function (user) {
// if the user is signed in
if (user && user.isSignedIn()) {
// validate the token on your server,
// your server will need to double check that the
// `hd` matches your specified `hosted_domain`;
validateTokenOnYourServer(user.getAuthResponse().id_token)
.then(function () {
console.log('yay');
})
.catch(function (err) {
auth2.then(function() { auth2.signOut(); });
});
}
});
});
服务器代码（使用googles Node.js库）：
如果您不使用Node.js，则可以在此处查看其他示例：https : //developers.google.com/identity/sign-in/web/backend-auth
const GoogleAuth = require('google-auth-library');
const Auth = new GoogleAuth();
const authData = JSON.parse(fs.readFileSync(your_auth_creds_json_file));
const oauth = new Auth.OAuth2(authData.web.client_id, authData.web.client_secret);
const acceptableISSs = new Set(
['accounts.google.com', 'https://accounts.google.com']
);
const validateToken = (token) => {
return new Promise((resolve, reject) => {
if (!token) {
reject();
}
oauth.verifyIdToken(token, null, (err, ticket) => {
if (err) {
return reject(err);
}
const payload = ticket.getPayload();
const tokenIsOK = payload &&
payload.aud === authData.web.client_id &&
new Date(payload.exp * 1000) > new Date() &&
acceptableISSs.has(payload.iss) &&
payload.hd === 'your-special-domain.com';
return tokenIsOK ? resolve() : reject();
});
});
};