GMail Api throws 400 Precondition failed using a service account

Hi,

I found a similar thing reported at https://stackoverflow.com/questions/34678678/failedprecondition-error-wh...

Can you try that solution i.e. use

$client->setConfig('subject', 'you@email.com');

If that solves the problem then report back so that I can think of some solution . I recommend using client_email from the credentials, if that doesn't work then use the account email and update me which one works, or both fail.

Thanks,
Sadashiv.

Yep, that seemed to do the trick. Thanks.

Below is my altered code. I just added the line $googleService->googleClient->setConfig('subject', $gmailAddress); Based on your find I also found an old issue from 2016 in the google clients issues that talks about it. https://github.com/googleapis/google-api-php-client/issues/891

Looks like it's an undocumented change to the apis or if it is documented it's buried somewhere. I don't know if it's worth trying to make a "fix" for this vs maybe adding it to the documentation somewhere. Hopefully this is the only gotcha, I started with gmail for what I'm doing because I already had examples that worked. One would think this only applies to the GMail apis but who knows.

And to answer your question about which email I used, it was the email address I'm trying to impersonate so NOT the one from the api credentials since this is intended to pull emails for a user logged into our Drupal.

Thanks for the quick response.

// Would normally be passed into this as a function parameter
$gmailAddress = 'some_user@valid_domain.com';

$google_api_service_client = \Drupal::entityTypeManager()->getStorage('google_api_service_client')->load('stored_client_id');

// Get the service.
$googleService = \Drupal::service('google_api_service_client.client');

// Set the account.
$googleService->setGoogleApiClient($google_api_service_client);

// Define subject for impersonation
$googleService->googleClient->setConfig('subject', $gmailAddress);

// Set optional parameters for the Gmail service
$optParams = array(
  'labelIds' => 'INBOX',
  'q' => '@uncc.edu',
  'maxResults' => 10,
);

try {
  $gmail = new \Google_Service_Gmail($googleService->googleClient);
  $threads = $gmail->users_messages->listUsersMessages($gmailAddress, $optParams);
  dpm($threads);
}
catch (Exception $e) {
  ksm($e);
}

Thanks for updating this info, as you mentioned the email expected is of the end user I can't implement a genarilsed fix and all developers have to handle it in the code.

Thanks,
Sadashiv.