Google API for analytics invalid grant but works sometimes - json

Question

I've been on this problem now for 2 days and have tried looking under google code and stackoverflow but still can come up with an answer.
My problem is when I try my google analytics api I get "Error refreshing the OAuth2 token, message: '{ "error" : "invalid_grant" }'"
But the weird part is that some times it will work. rarely but if I refresh and keep trying it, it will output.
The only thing I could find is that it could be the refresh token limit has been exceeded
Attached is my code if someone could help me out or point me to the right direction.
Thanks!
<?php
session_start();
require_once 'Google_Client.php';
require_once 'Google_AnalyticsService.php';
require_once 'config.php';
$keyFile = 'key.p12';
$client = new Google_Client();
$client->setApplicationName("test");
if (isset($_SESSION['token'])) {
$client->setAccessToken($_SESSION['token']);
}
$client->setAssertionCredentials(new Google_AssertionCredentials(
GOOGLE_SERVICE_ACCOUNT,
array('https://www.googleapis.com/auth/analytics.readonly'),
file_get_contents($keyFile))
);
$client->setClientId(GOOGLE_CLIENT_ID);
$client->setAccessType('offline');
$client->setUseObjects(true);
$service = new Google_AnalyticsService($client);
try {
$results = $service->data_ga->get(
'ga:44444444',
date('Y-m-d', strtotime('-30 days '.date('Y-m-d', strtotime('-1 day '.date('Y-m- d'))))),
date('Y-m-d', strtotime('-1 day '.date('Y-m-d'))),
'ga:visits,ga:newVisits',
/*array(
'dimensions' => 'ga:source,ga:keyword',
'sort' => '-ga:visits,ga:keyword',
'filters' => 'ga:medium==organic',
'max-results' => '25'
)*/
array('dimensions' => 'ga:date')
);
} catch (Google_ServiceException $e) {
// echo $e->getMessage();
}
if ($client->getAccessToken()) {
$_SESSION['token'] = $client->getAccessToken();
}
$dateParsePattern = '/"Date.parse\(\\\"((\d{4})-(\d{2})-(\d{2})) UTC\\\"\)"/';
$dateParseReplacement = 'Date.parse("$1 UTC")';
$allVisitsItems = array();
$newVisitorsItems = array();
if ($results && count($results->getRows()) > 0) {
foreach ($results->getRows() as $row) {
$date = 'Date.parse("'.date("Y-m-d", strtotime($row[0])).' UTC")';
$allVisitsItems[] = array($date, intval(htmlspecialchars($row[1], ENT_NOQUOTES)));
$newVisitorsItems[] = array($date, intval(htmlspecialchars($row[2], ENT_NOQUOTES)));
}
}
header('Content-Type: application/json');
?>
<?php echo preg_replace($dateParsePattern, $dateParseReplacement, json_encode($allVisitsItems)) ?>
Edit - It's not the NTP, when I echoed date('l jS \of F Y h:i:s A'); it matched up.

Answer 1

The following works to generate output - make sure you are running PHP 5.3 or higher.
<?php
require_once './src/Google_Client.php';
require_once './src/contrib/Google_AnalyticsService.php';
$path_to_keyfile = '.p12';
$service_account_email = '7#developer.gserviceaccount.com';
$client_id = '7.apps.googleusercontent.com';
$analytics_profile_id = 'ga:IN URL OF ANALYTICS';
$client = new Google_Client();
$client->setApplicationName("API TEST");
$client->setAssertionCredentials(
new Google_AssertionCredentials(
$service_account_email,
array('https://www.googleapis.com/auth/analytics.readonly'),
file_get_contents($path_to_keyfile)
)
);
$client->setClientId($client_id);
$client->setAccessType('offline_access');
$service = new Google_AnalyticsService($client);
$from = date('Y-m-d', strtotime('-30 days '.date('Y-m-d', strtotime('-1 day '.date('Y-m-d'))))); // 30 days
$to = date('Y-m-d', strtotime('-1 day '.date('Y-m-d'))); // yesterday
$dateParsePattern = '/"Date.parse\(\\\"((\d{4})-(\d{2})-(\d{2})) UTC\\\"\)"/';
$dateParseReplacement = 'Date.parse("$1 UTC")';
$allVisitsItems = array();
$newVisitorsItems = array();
try {
$data = $service->data_ga->get(
//
$analytics_profile_id,
$from,
$to,
'ga:visits,ga:newVisits',
array('dimensions' => 'ga:date')
);
if($data && $data['totalResults'] > 0) {
foreach($data['rows'] as $row) {
$date = 'Date.parse("'.date("Y-m-d", strtotime($row[0])).' UTC")';
$allVisitsItems[] = array($date, intval(htmlspecialchars($row[1], ENT_NOQUOTES)));
$newVisitorsItems[] = array($date, intval(htmlspecialchars($row[2], ENT_NOQUOTES)));
}
}
header('Content-Type: application/json');
?>
<?php echo preg_replace($dateParsePattern, $dateParseReplacement, json_encode($allVisitsItems)) ?>
<?php echo preg_replace($dateParsePattern, $dateParseReplacement, json_encode($newVisitorsItems)) ?>
<?php
} catch(Exception $e) {
echo 'There was an error : - ' . $e->getMessage();
}