1 files changed, 15 insertions, 0 deletions
diff --git a/lib/private/connector/sabre/file.php b/lib/private/connector/sabre/file.php
index 12ce633838f..e57d04f9a6e 100644
--- a/lib/private/connector/sabre/file.php
+++ b/lib/private/connector/sabre/file.php
@@ -220,6 +220,21 @@ class OC_Connector_Sabre_File extends OC_Connector_Sabre_Node implements \Sabre\
 	}
 
 	/**
+	 * Returns the ETag for a file
+	 *
+	 * An ETag is a unique identifier representing the current version of the
+	 * file. If the file changes, the ETag MUST change.  The ETag is an
+	 * arbitrary string, but MUST be surrounded by double-quotes.
+	 *
+	 * Return null if the ETag can not effectively be determined
+	 *
+	 * @return mixed
+	 */
+	public function getETag() {
+		return '"' . $this->info->getEtag() . '"';
+	}
+
+	/**
 	 * Returns the mime-type for a file
 	 *
 	 * If null is returned, we'll assume application/octet-stream