From 30d7f92763505e52a41788012f87142f298a3461 Mon Sep 17 00:00:00 2001
From: Vincent Petry <pvince81@owncloud.com>
Date: Mon, 27 Apr 2015 17:41:02 +0200
Subject: [PATCH] Get etag from remote OC server

---
 lib/private/files/storage/dav.php | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/lib/private/files/storage/dav.php b/lib/private/files/storage/dav.php
index 0ddfde1504..15f513585f 100644
--- a/lib/private/files/storage/dav.php
+++ b/lib/private/files/storage/dav.php
@@ -682,7 +682,7 @@ class DAV extends Common {
 	public function getPermissions($path) {
 		$this->init();
 		$path = $this->cleanPath($path);
-		$response = $this->client->propfind($this->encodePath($path), array('{http://owncloud.org/ns}permissions'));
+		$response = $this->propfind($path);
 		if (isset($response['{http://owncloud.org/ns}permissions'])) {
 			return $this->parsePermissions($response['{http://owncloud.org/ns}permissions']);
 		} else if ($this->is_dir($path)) {
@@ -694,6 +694,17 @@ class DAV extends Common {
 		}
 	}
 
+	/** {@inheritdoc} */
+	public function getETag($path) {
+		$this->init();
+		$path = $this->cleanPath($path);
+		$response = $this->propfind($path);
+		if (isset($response['{DAV:}getetag'])) {
+			return trim($response['{DAV:}getetag'], '"');
+		}
+		return parent::getEtag($path);
+	}
+
 	/**
 	 * @param string $permissionsString
 	 * @return int
@@ -733,8 +744,11 @@ class DAV extends Common {
 			$response = $this->propfind($path);
 			if (isset($response['{DAV:}getetag'])) {
 				$cachedData = $this->getCache()->get($path);
-				$etag = trim($response['{DAV:}getetag'], '"');
-				if ($cachedData['etag'] !== $etag) {
+				$etag = null;
+				if (isset($response['{DAV:}getetag'])) {
+					$etag = trim($response['{DAV:}getetag'], '"');
+				}
+				if (!empty($etag) && $cachedData['etag'] !== $etag) {
 					return true;
 				} else if (isset($response['{http://owncloud.org/ns}permissions'])) {
 					$permissions = $this->parsePermissions($response['{http://owncloud.org/ns}permissions']);