From c955381d5691be00053e52a0e43df698478d979c Mon Sep 17 00:00:00 2001
From: Bjoern Schiessle <schiessle@owncloud.com>
Date: Tue, 17 Dec 2013 16:18:05 +0100
Subject: [PATCH] fall back to getLocalFile if storage doesn't support fseek

---
 apps/files_encryption/lib/util.php | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/apps/files_encryption/lib/util.php b/apps/files_encryption/lib/util.php
index d4aa4d31649..577b656077f 100644
--- a/apps/files_encryption/lib/util.php
+++ b/apps/files_encryption/lib/util.php
@@ -472,8 +472,20 @@ class Util {
 		// we only need 24 byte from the last chunk
 		$data = '';
 		$handle = $this->view->fopen($path, 'r');
-		if (is_resource($handle) && !fseek($handle, -24, SEEK_END)) {
-			$data = fgets($handle);
+		if (is_resource($handle)) {
+			if (fseek($handle, -24, SEEK_END) === 0) {
+				$data = fgets($handle);
+			} else {
+				// if fseek failed on the storage we create a local copy from the file
+				// and read this one
+				fclose($handle);
+				$localFile = $this->view->getLocalFile($path);
+				$handle = fopen($localFile, 'r');
+				if (is_resource($handle) && fseek($handle, -24, SEEK_END) === 0) {
+					$data = fgets($handle);
+				}
+			}
+			fclose($handle);
 		}
 
 		// re-enable proxy
-- 
2.39.5