updates auth and uses in-memory cache (#1019)

Author: bshaffer

composer.json

@@ -7,7 +7,7 @@
     "license": "Apache-2.0",
     "require": {
         "php": ">=5.4",
-        "google/auth": "0.9",
+        "google/auth": "0.10",
         "google/apiclient-services": "^0.6",
         "firebase/php-jwt": "~2.0|~3.0",
         "monolog/monolog": "^1.17",

src/Google/AccessToken/Verify.php

@@ -22,6 +22,7 @@
 use phpseclib\Crypt\RSA;
 use phpseclib\Math\BigInteger;
 use Psr\Cache\CacheItemPoolInterface;
+use Google\Auth\Cache\MemoryCacheItemPool;
 use Stash\Driver\FileSystem;
 use Stash\Pool;
 
@@ -55,8 +56,12 @@ public function __construct(ClientInterface $http = null, CacheItemPoolInterface
       $http = new Client();
     }
 
-    if (is_null($cache) && class_exists('Stash\Pool')) {
-      $cache = new Pool(new FileSystem);
+    if (is_null($cache)) {
+      if (class_exists('Stash\Pool')) {
+        $cache = new Pool(new FileSystem);
+      } else {
+        $cache = new MemoryCacheItemPool;
+      }
     }
 
     $this->http = $http;

src/Google/Client.php

@@ -16,6 +16,7 @@
  */
 
 use Google\Auth\ApplicationDefaultCredentials;
+use Google\Auth\Cache\MemoryCacheItemPool;
 use Google\Auth\CredentialsLoader;
 use Google\Auth\HttpHandler\HttpHandlerFactory;
 use Google\Auth\OAuth2;
@@ -950,6 +951,10 @@ public function setCache(CacheItemPoolInterface $cache)
    */
   public function getCache()
   {
+    if (!$this->cache) {
+      $this->cache = $this->createDefaultCache();
+    }
+
     return $this->cache;
   }
 
@@ -990,6 +995,18 @@ protected function createDefaultLogger()
     return $logger;
   }
 
+  protected function createDefaultCache()
+  {
+    // use filesystem cache by default if tedivm/stash exists
+    if (class_exists('Stash\Pool')) {
+      $cache = new Stash\Pool(new Stash\Driver\FileSystem);
+    } else {
+      $cache = new MemoryCacheItemPool;
+    }
+
+    return $cache;
+  }
+
   /**
    * Set the Http Client object
    * @param GuzzleHttp\ClientInterface $http