How can I get an updated access token, using stored refresh token

Question

I'm building an application that allows the admin to authenticate access to their analytics account for offline usage, and stores the refresh token in the database.

Now when I try to use the API on the frontend, it returns the following error:

"Access Token Expired. There wan a general error : The OAuth 2.0 access token has expired, and a refresh token is not available. Refresh tokens are not returned for responses that were auto-approved."

Here's my code that generates this error so far:

require_once "lib/google/Google_Client.php";
require_once "lib/google/contrib/Google_AnalyticsService.php";

$_analytics = new analytics();
$_googleClient = new Google_Client();
$_googleClient->setClientId($_analytics->gaClientId);
$_googleClient->setClientSecret($_analytics->gaClientSecret);
$_googleClient->setRedirectUri($_analytics->gaRedirectUri);
$_googleClient->setScopes($_analytics->gaScope);
$_googleClient->setAccessType($_analytics->gaAccessType);

// Returns last access token from the database (this works)
$_tokenArray['access_token'] = $_analytics->dbAccessToken($_agencyId);
$_googleClient->setAccessToken(json_encode($_tokenArray));

if($_googleClient->isAccessTokenExpired()) {
    // Don't think this is required for Analytics API V3
    //$_googleClient->refreshToken($_analytics->dbRefreshToken($_agencyId));
    echo 'Access Token Expired'; // Debug
}

if (!$_googleClient->getAccessToken()) {
    echo '<h2>Error - Admin has not setup analytics correct yet</h2>';
}

I'm after a function to run something like setRefreshToken - entering the value from the database, from the admin previously authenticating it online.

Answer 1

You could try the following, you would need to add in the code to store the new token in your database.

if($_googleClient->isAccessTokenExpired()) {
    // Don't think this is required for Analytics API V3
    //$_googleClient->refreshToken($_analytics->dbRefreshToken($_agencyId));
    echo 'Access Token Expired'; // Debug

    $_googleClient->authenticate();
    $NewAccessToken = json_decode($_googleClient->getAccessToken());
    $_googleClient->refreshToken($NewAccessToken->refresh_token);
}