我正在使用 codeigniter MVC 框架使用谷歌客户端库登录我的网站。当谷歌使用代码重定向并且我执行以下代码时，一切都运行良好，期待 $client->getAccessToken()。 $client->getAccessToken() 返回空值。我看了很多教程，但没有得到任何帮助。这是我的 Controller 功能一的代码。在此函数中，我设置我的凭据以创建 authUrl。

public function login()
{
    // Include two files from google-php-client library in controller
    include_once APPPATH . 'third_party/google-api-php-client/vendor/autoload.php';
    
    // Store values in variables from project created in Google Developer Console
    $client_id = 'XXXXXX';
    $client_secret = 'XXXXX';
    $redirect_uri = 'path/to/mysite/login/loginGoogle';
    $simple_api_key = 'XXXXXXX';
    
    // Create Client Request to access Google API
    $client = new Google_Client();
    $client->setApplicationName("mysite");
    $client->setClientId($client_id);
    $client->setClientSecret($client_secret);
    $client->setRedirectUri($redirect_uri);
    $client->setDeveloperKey($simple_api_key);
    $client->addScope("https://www.googleapis.com/auth/userinfo.email");
    
    $authUrl = $client->createAuthUrl();
    $data['authUrl'] = $authUrl;
    
    $this->load->view('login',$data);
}

之后，当谷歌进行身份验证并重定向到我的重定向 uri 时，这是下面给出的另一个 Controller 功能。问题出在这个函数中。

public function loginGoogle()
{
    // Include two files from google-php-client library in controller
    include_once APPPATH . 'third_party/google-api-php-client/vendor /autoload.php';
       $client_id = 'XXXXXX';
        $client_secret = 'XXXXX';
        $redirect_uri = 'path/to/mysite/login/loginGoogle';
        $simple_api_key = 'XXXXXXX';
    
    // Create Client Request to access Google API
    $client = new Google_Client();
    $client->setApplicationName("mysite");
    $client->setClientId($client_id);
    $client->setClientSecret($client_secret);
    $client->setRedirectUri($redirect_uri);
    $client->setDeveloperKey($simple_api_key);
    $client->addScope("https://www.googleapis.com/auth/userinfo.email");
$objOAuthService = new Google_Service_Oauth2($client);
    
    // Add Access Token to Session
    if(!isset($_SESSION['access_token'])){
        
        if (isset($_GET['code'])) {
            $client->authenticate($_GET['code']);
            $token = $client->getAccessToken();                 
            $_SESSION['access_token'] = $token;
            print_r($this -> session -> userdata());exit;
            header('Location: ' . filter_var($redirect_uri, FILTER_SANITIZE_URL));
        }
    }
    // Set Access Token to make Request
    if (isset($_SESSION['access_token']) && $_SESSION['access_token']) {
        $client->setAccessToken($_SESSION['access_token']);
    }
    // Get User Data from Google and store them in $data
    if ($client->getAccessToken()) {
        $userData = $objOAuthService->userinfo->get();
        $data['userData'] = $userData;
        $_SESSION['access_token'] = $client->getAccessToken();
    }}

这里的第二个函数 getAccessToken 什么都不返回，谷歌抛出预期。

最佳答案

看起来您从未获得刷新 token 。有两种不同的 token ，访问 token 每隔几个小时左右就会过期，但刷新 token 只会在重定向请求用户许可时发送一次。它需要存储在安全的地方，并在将来用于刷新访问 token 。 这是我的 codeigniter 代码访问 Google API 的样子(这将替换您在 loginGoogle 函数中的 if 语句:

        if($refresh_token_accessed_from_my_database) {
            //If session contains no valid Access token, get a new one
            if ($client->isAccessTokenExpired()) {
                $client->refreshToken($refresh_token_accessed_from_my_database);
            }
            //We have access token now, launch the service
            $this->service = new Google_Service_Calendar($client);
        }
        else {
            //User has never been authorized, so let's ask for the ok
            if (isset($_GET['code'])) {
                //Creates refresh and access tokens
                $credentials = $client->authenticate($_GET['code']);

                //Store refresh token for further use
                //I store mine in the DB, I've seen others store it in a file in a secure place on the server
                $refresh_token = $credentials['refresh_token'];
                //refresh_token->persist_somewhere()

                //Store the access token in the session so we can get it after
                //the callback redirect
                $_SESSION['access_token'] = $client->getAccessToken();
                $redirect_uri = 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF'];
                header('Location: ' . filter_var($redirect_uri, FILTER_SANITIZE_URL));
            }

            if (!isset($_SESSION['access_token'])) {
                $auth_url = $client->createAuthUrl();
                header('Location: ' . filter_var($auth_url, FILTER_SANITIZE_URL));
            }

            if (isset($_SESSION['access_token']) && $_SESSION['access_token']) {
                $client->setAccessToken($_SESSION['access_token']);
                $this->service = new Google_Service_Calendar($client);
            }

关于php - Oauth 2 $client->getAccessToken() 返回空值，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34479975/