Automatically create temp directory for OAuth Storage

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@1657 44740490-163a-0410-bde0-09ae8108e29a

modules/oauth/lib/OAuthStore.php

@@ -14,6 +14,13 @@ class sspmod_oauth_OAuthStore extends OAuthDataStore {
 	private $path;
 
     function __construct($path = '/tmp/oauth/') {
+			
+		if (!file_exists($path)) {
+			mkdir($path);
+		} else {
+			if (!is_dir($path)) 
+				throw new Exception('OAuth Storage Path [' . $path . '] is not a valid directory');
+		}
 		$this->path = $path;
     }