Invlid_grant尝试刷新令牌时 - Google Oauth - PHP

Question

刚刚开始使用google admin SDK，尝试检索特定用户的信息。 我不断收到同样的错误一遍又一遍

[29-May-2015 14:41:18 Africa/Tunis] PHP Fatal error: Uncaught 
exception 'Google_Auth_Exception' with message 'Error refreshing the 
OAuth2 token, message: '{ "error" : "invalid_grant" 

我的研究过程中我发现，它主要是一个同步问题（服务器时间） 但我的web应用程序托管在第三方server.checked我的服务帐户凭据

PS：不知道，如果它的事项，但服务器的时区是GMT + 1

`

<?php 
require 'src/Google/autoload.php'; 

session_start(); 

$timestamp = $_SERVER['REQUEST_TIME']; 
echo gmdate("Y-m-d\TH:i:s\Z", $timestamp); 

$service_account_name = "xx"; 
$key_file_location = "yyy.p12"; 

$client = new Google_Client(); 

$client->setApplicationName("Members"); 

$directory = new Google_Service_Directory($client); 

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

$key = file_get_contents($key_file_location); 

$cred = new Google_Auth_AssertionCredentials(
    // Replace this with the email address from the client. 
    $service_account_name, 
    // Replace this with the scopes you are requesting. 
    array('https://www.googleapis.com/admin/directory/v1/users'), 
    $key, 
    'notasecret' 

); 
$cred->sub = "admin-email"; 
$client->setAssertionCredentials($cred); 

if ($client->getAuth()->isAccessTokenExpired()) { 
    $client->getAuth()->refreshTokenWithAssertion($cred); 
} 
$_SESSION['service_token'] = $client->getAccessToken(); 


$email = "personto lookfor-email"; 
$r = $dir->users->get($email); 
if($r) { 
    echo "Name: ".$r->name->fullName."<br/>"; 
    echo "Suspended?: ".(($r->suspended === true) ? 'Yes' : 'No')."<br/>"; 
    echo "Org/Unit/Path: ".$r->orgUnitPath."<br/>"; 
} else { 
    echo "User does not exist: $email<br/>"; 
    // if the user doesn't exist, it's safe to create the new user 
} 

`

Answer 1

“无效的授权”错误的原因可能是由于刷新令牌不起作用。发生这种情况当刷新令牌的数量超过限制时，旧令牌变为无效。如果应用程序尝试使用无效刷新标记，则返回invalid_grant错误响应。有关更多文档，请参阅link。