allow vendord

vendor/google/auth/src/GCECache.php

@@ -0,0 +1,82 @@
+<?php
+/*
+ * Copyright 2020 Google Inc.
+ *
+ * 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;
+
+use Google\Auth\Credentials\GCECredentials;
+use Psr\Cache\CacheItemPoolInterface;
+
+/**
+ * A class to implement caching for calls to GCECredentials::onGce. This class
+ * is used automatically when you pass a `Psr\Cache\CacheItemPoolInterface`
+ * cache object to `ApplicationDefaultCredentials::getCredentials`.
+ *
+ * ```
+ * $sysvCache = new Google\Auth\SysvCacheItemPool();
+ * $creds = Google\Auth\ApplicationDefaultCredentials::getCredentials(
+ *     $scope,
+ *     null,
+ *     null,
+ *     $sysvCache
+ * );
+ * ```
+ */
+class GCECache
+{
+    const GCE_CACHE_KEY = 'google_auth_on_gce_cache';
+
+    use CacheTrait;
+
+    /**
+     * @param array<mixed> $cacheConfig Configuration for the cache
+     * @param CacheItemPoolInterface $cache
+     */
+    public function __construct(
+        ?array $cacheConfig = null,
+        ?CacheItemPoolInterface $cache = null
+    ) {
+        $this->cache = $cache;
+        $this->cacheConfig = array_merge([
+            'lifetime' => 1500,
+            'prefix' => '',
+        ], (array) $cacheConfig);
+    }
+
+    /**
+     * Caches the result of onGce so the metadata server is not called multiple
+     * times.
+     *
+     * @param callable|null $httpHandler callback which delivers psr7 request
+     * @return bool True if this a GCEInstance, false otherwise
+     */
+    public function onGce(?callable $httpHandler = null)
+    {
+        if (is_null($this->cache)) {
+            return GCECredentials::onGce($httpHandler);
+        }
+
+        $cacheKey = self::GCE_CACHE_KEY;
+        $onGce = $this->getCachedValue($cacheKey);
+
+        if (is_null($onGce)) {
+            $onGce = GCECredentials::onGce($httpHandler);
+            $this->setCachedValue($cacheKey, $onGce);
+        }
+
+        return $onGce;
+    }
+}