Gmail API返回403错误代码和"Delegation denied for <user email>“

Question

Gmail API在一个域名检索消息时失败，错误如下：

com.google.api.client.googleapis.json.GoogleJsonResponseException: 403 OK
{
  "code" : 403,
  "errors" : [ {
    "domain" : "global",
    "message" : "Delegation denied for <user email>",
    "reason" : "forbidden"
  } ],
  "message" : "Delegation denied for <user email>"
}

我使用OAuth 2.0和Google Apps Domain-Wide授权来访问用户数据。域已向应用程序授予数据访问权限。

Answer 1

似乎最好的做法是在你的请求中总是有userId="me“。这告诉API只使用经过身份验证的用户的邮箱--不需要依赖电子邮件地址。

Answer 2

我们的用户已经迁移到一个域中，他们的帐户有别名。我们需要将SendAs地址默认为其中一个导入的别名，并希望有一种方法使其自动化。Gmail API看起来像是解决方案，但是我们的特权用户拥有更改帐户的角色并不起作用--我们一直看到"Delegation denied for“403错误。

下面是一个PHP示例，说明我们如何列出他们的SendAs设置。

<?PHP

//
// Description:
//   List the user's SendAs addresses.
//
// Documentation:
//   https://developers.google.com/gmail/api/v1/reference/users/settings/sendAs
//   https://developers.google.com/gmail/api/v1/reference/users/settings/sendAs/list
//
// Local Path:
//   /path/to/api/vendor/google/apiclient-services/src/Google/Service/Gmail.php
//   /path/to/api/vendor/google/apiclient-services/src/Google/Service/Gmail/Resource/UsersSettingsSendAs.php
//
// Version:
//    Google_Client::LIBVER  == 2.1.1
//

require_once $API_PATH . '/path/to/google-api-php-client/vendor/autoload.php';

date_default_timezone_set('America/Los_Angeles');

// this is the service account json file used to make api calls within our domain
$serviceAccount = '/path/to/service-account-with-domain-wide-delagation.json';
putenv('GOOGLE_APPLICATION_CREDENTIALS=' . $serviceAccount );

$userKey = 'someuser@my.domain';

// In the Admin Directory API, we may do things like create accounts with 
// an account having roles to make changes. With the Gmail API, we cannot 
// use those accounts to make changes. Instead, we impersonate
// the user to manage their account.

$impersonateUser = $userKey;

// these are the scope(s) used.
define('SCOPES', implode(' ', array( Google_Service_Gmail::GMAIL_SETTINGS_BASIC ) ) );

$client = new Google_Client();
$client->useApplicationDefaultCredentials();  // loads whats in that json service account file.
$client->setScopes(SCOPES); // adds the scopes
$client->setSubject($impersonateUser);  // account authorized to perform operation

$gmailObj  = new Google_Service_Gmail($client);

$res       = $gmailObj->users_settings_sendAs->listUsersSettingsSendAs($userKey);

print_r($res);


?>

Answer 3

我之前也遇到过同样的问题，解决方案非常棘手，你需要首先模拟你需要访问gmail内容的人，然后使用userId='me‘来运行查询。这对我很管用。

下面是一些示例代码：

   users = # coming from directory service
   for user in users:
     credentials = service_account.Credentials.from_service_account_file(
        SERVICE_ACCOUNT_FILE, scopes=SCOPES)
     ####IMPORTANT######
     credentials_delegated = credentials.with_subject(user['primaryEmail'])

     gmail_service = build('gmail', 'v1', credentials=credentials_delegated)

     results = gmail_service.users().labels().list(userId='me').execute()
     labels = results.get('labels', [])
       for label in labels:
          print(label['name'])