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<?php
/*
* Copyright 2023 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
namespace Google\Auth;
/**
* Provides shared methods for updating request metadata (request headers).
*
* Should implement {@see UpdateMetadataInterface} and {@see FetchAuthTokenInterface}.
*
* @internal
*/
trait UpdateMetadataTrait
{
use MetricsTrait;
/**
* export a callback function which updates runtime metadata.
*
* @return callable updateMetadata function
* @deprecated
*/
public function getUpdateMetadataFunc()
{
return [$this, 'updateMetadata'];
}
/**
* Updates metadata with the authorization token.
*
* @param array<mixed> $metadata metadata hashmap
* @param string $authUri optional auth uri
* @param callable $httpHandler callback which delivers psr7 request
* @return array<mixed> updated metadata hashmap
*/
public function updateMetadata(
$metadata,
$authUri = null,
callable $httpHandler = null
) {
$metadata_copy = $metadata;
// We do need to set the service api usage metrics irrespective even if
// the auth token is set because invoking this method with auth tokens
// would mean the intention is to just explicitly set the metrics metadata.
$metadata_copy = $this->applyServiceApiUsageMetrics($metadata_copy);
if (isset($metadata_copy[self::AUTH_METADATA_KEY])) {
// Auth metadata has already been set
return $metadata_copy;
}
$result = $this->fetchAuthToken($httpHandler);
if (isset($result['access_token'])) {
$metadata_copy[self::AUTH_METADATA_KEY] = ['Bearer ' . $result['access_token']];
} elseif (isset($result['id_token'])) {
$metadata_copy[self::AUTH_METADATA_KEY] = ['Bearer ' . $result['id_token']];
}
return $metadata_copy;
}
}
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