refresh token with google api client php

Question

My pain with google api continues...

I'm able to use a script to use a refresh token - automatically refresh and keep my access to a calender alive. I can interact with the calendar and all is good.

I now want to move on to using the google api client for php and I had this working yesterday whilst my token was valid but now this has expired I can't work out how to use the refresh token to get a new token and to keep authenticating once it expires in the future.

I've found a number of references and tried these - here's my test script so far based on the simple.php example:

<?php
require_once '../../src/Google_Client.php';
require_once '../../src/contrib/Google_CalendarService.php';
session_start();

$client = new Google_Client();
$client->setAccessType('offline');
$client->setApplicationName("Downs Golfmanager");


// Visit https://code.google.com/apis/console?api=calendar to generate your
// client id, client secret, and to register your redirect uri.
$client->setClientId('XXXXXX.apps.googleusercontent.com');
$client->setClientSecret('XXXXXX');
$client->setRedirectUri('XXXXXX');
$client->setDeveloperKey('XXXXXX');
$client->refreshToken('X/XXXXX');


$client->setUseObjects(true);
$cal = new Google_CalendarService($client);
if (isset($_GET['logout'])) {
  unset($_SESSION['token']);
}

if (isset($_GET['code'])) {
  $client->authenticate($_GET['code']);
  $_SESSION['token'] = $client->getAccessToken();
  header('Location: http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF']);
}

if (isset($_SESSION['token'])) {
  $client->setAccessToken($_SESSION['token']);
}

if($client->isAccessTokenExpired()) {
    /
    echo 'Access Token Expired'; // Debug
    //$client->refreshToken($refreshToken);
}

if ($client->getAccessToken()) {

    $event = new Google_Event();

    $event->setSummary('Appointment');
    $event->setLocation('Somewhere');

    $start = new Google_EventDateTime();
    $start->setDateTime('2013-08-28T14:00:00.000+01:00');
    $event->setStart($start);

    $end = new Google_EventDateTime();
    $end->setDateTime('2013-08-28T15:25:00.000+01:00');
    $event->setEnd($end);

    $createdEvent = $cal->events->insert('[email protected]', $event);

    //echo "<pre>" . print_r($createdEvent, true) . "</pre>";
    echo $createdEvent->getId();


    //test pulling events
    $events = $cal->events->listEvents('[email protected]');

    while(true) {
      foreach ($events->getItems() as $event) {
        echo $event->getSummary();
      }
      $pageToken = $events->getNextPageToken();
      if ($pageToken) {
        $optParams = array(
            'pageToken' => $pageToken,
            'timeMin'=>'2013-08-26T00:00:00+01:00',
            'timeMax'=>'2013-08-31T00:00:00+01:00'
            );
        $events = $cal->events->listEvents('[email protected]', $optParams);
      } else {
        break;
      }
    }
    //print "<h1>Events List</h1><pre>" . print_r($events, true) . "</pre>";



  $calList = $cal->calendarList->listCalendarList();
  print "<h1>Calendar List</h1><pre>" . print_r($calList, true) . "</pre>";


$_SESSION['token'] = $client->getAccessToken();
} else {
  $authUrl = $client->createAuthUrl();
  print "<a class='login' href='$authUrl'>Connect Me!</a>";
}

As with my previous posts I'm not clear what should be going on here. My token has expired - I have the refresh token. what changes to my code do I need to automatically refresh authorisation each time I access.

Edit: The error code is: The OAuth 2.0 access token has expired, and a refresh token is not available

I've commented out a couple of additional lines above which I'd included in my attempts to solve just to try and avoid confusing further

Thank you

Answer 1

OK - Based on a couple of posts I've fixed the problem of getting the refresh token to get a new access token. I used this code before I started to attempt any access:

if($client->isAccessTokenExpired()) {
    echo 'Access Token Expired'; // Debug
    $client->refreshToken('X/XXXXXX');
}

Where the blanked out part in refreshToken is my refresh token. I hard coded the key into the code.

This is probably not the correct solution as I've seen references to storing the key in a database, so presumably I could store the current access token in a db with the refresh token and pull these form the db as and when required to save hard coding them?

Hopefully this method I've used will work again after it expires - fingers crossed!