如何使用刷新令牌（php）获取google api的更新访问令牌？

Question

为了使代码正常工作，使用 Google 的官方库通过 PHP 来使用 API。

// connect the library to work with the Google API
require_once 'vendor/autoload.php';
echo '<pre>';

在此示例中，所有键都是手动设置的。

$array = '{"access_token":"***","expires_in":3599,"scope":"https:\/\/www.googleapis.com\/auth\/calendar https:\/\/www.googleapis.com\/auth\/userinfo.profile openid https:\/\/www.googleapis.com\/auth\/userinfo.email","token_type":"Bearer","id_token":"****","created":1644878660,"refresh_token":"**************"}';
print_r($array);

// Application Options
// Application ID
define('GOOGLE_CLIENT_ID', '************');
// Secret Apps
define('GOOGLE_CLIENT_SECRET', '*********************');
// The address to which the user will be redirected after authorization
define('GOOGLE_CLIENT_REDIRECT_URL', 'https://*************/api/google-login.php');

需要访问的区域。

// Areas to which access will be requested
define('SCOPES', implode(' ', [
    Google_Service_Calendar::CALENDAR,
    'https://www.googleapis.com/auth/userinfo.profile',
    'https://www.googleapis.com/auth/userinfo.email'
]));

// Initializing the Google Client
$client = new Google_Client();
$client->setClientId(GOOGLE_CLIENT_ID);
$client->setClientSecret(GOOGLE_CLIENT_SECRET);
$client->setRedirectUri(GOOGLE_CLIENT_REDIRECT_URL);
$client->setScopes(SCOPES);
$client->setAccessType('offline');
$client->setApprovalPrompt('force');

// Retrieving a token from an array
$accessToken = json_decode($array, true);
print_r($accessToken);
$client->setAccessToken($accessToken);

实际上是提出最多问题的领域。

// If the token has expired, update it
if ($client->isAccessTokenExpired()) {
 
    // When refreshing a refresh token, the token is missing
    // Therefore, we save the refresh token in a separate variable
    $refreshTokenSaved = $client->getRefreshToken();
 
    // Refreshing the token
    $client->fetchAccessTokenWithRefreshToken($refreshTokenSaved);
 
    // We create a new variable in which we place the new updated token
    $accessTokenUpdated = $client->getAccessToken();
 
    // Add the old refresh token to this variable
    $accessTokenUpdated['refresh_token'] = $refreshTokenSaved;
 
    // Installing a new token
    $client->setAccessToken($accessTokenUpdated);
    
    
    echo $refreshTokenSaved.'<br>';
    print_r($accessTokenUpdated);
    echo '<br>';
    
}

我们显示用户数据请求的结果以检查访问令牌的有效性。

if (!$client->isAccessTokenExpired()) {
    $oauth2 = new Google_Service_Oauth2($client);
    $userInfo = $oauth2->userinfo->get();
    
    echo '<br><br>';
    echo 'Email: ';
    echo $userInfo->email;
    echo '<br><br>';
    echo 'sex: ';
    echo $userInfo->gender;
    echo '<br><br>';
    echo 'name: ';
    echo $userInfo->givenName;
    echo '<br><br>';
    echo 'Surname: ';
    echo $userInfo->familyName;
    echo '<br><br>';
    echo 'Full name: ';
    echo $userInfo->name;
    echo '<br><br>';
    echo 'ID: ';
    echo $userInfo->id;
    echo '<br><br>';
    echo 'Photo link: ';
    echo $userInfo->picture;
    echo '<br><br>';
} else {
    echo 'Error!';
}

echo '</pre>';

请检查我的代码。现在它正在返回旧的（无效的）访问令牌。谢谢！