<?php
require_once __DIR__ . '/../vendor/autoload.php';
use Google\Auth\ApplicationDefaultCredentials;
$auth_credentials = ApplicationDefaultCredentials::getCredentials(['https://www.googleapis.com/auth/pubsub']);
$channel_credentials = Grpc\ChannelCredentials::createSsl(file_get_contents(__DIR__ . '/../vendor/grpc/grpc/etc/roots.pem'));
$opts = ['credentials' => $channel_credentials, 'grpc.ssl_target_name_override' => 'pubsub.googleapis.com'];
$client = new google\pubsub\v1\PublisherClient('pubsub.googleapis.com', $opts);
$deadline = Grpc\Timeval::InfFuture();
$req = new google\pubsub\v1\ListTopicsRequest();
$proj = getenv('GAE_LONG_APP_ID');
$req->setProject('projects/' . $proj);
$call = $client->ListTopics($req, [], ['call_credentials_callback' => function ($context) use($auth_credentials) {
return $auth_credentials->updateMetadata([], $context->service_url);
}]);
list($response, $status) = $call->wait();
if ($status->code != 0) {
echo 'gRPC to PubSub failed, printing RPC status:<br>';
print_r($status);
exit(1);
}
foreach ($response->getTopics() as $topic) {
echo $topic->getName() . '<br>';
}
