add blacklist to txt preview backend

diff --git a/lib/preview/txt.php b/lib/preview/txt.php
index a487330691e05ce895920b55b11abed1e228068e..77e728eb3644d41476f2c38e3e07c0c5bd10388d 100644 (file)
--- a/lib/preview/txt.php
+++ b/lib/preview/txt.php
@@ -9,11 +9,21 @@ namespace OC\Preview;
 
 class TXT extends Provider {
 
+       private static $blacklist = array(
+               'text/calendar',
+               'text/vcard',
+       );
+
        public function getMimeType() {
                return '/text\/.*/';
        }
 
        public function getThumbnail($path, $maxX, $maxY, $scalingup, $fileview) {
+               $mimetype = $fileview->getMimeType($path);
+               if(in_array($mimetype, self::$blacklist)) {
+                       return false;
+               }
+
                $content = $fileview->fopen($path, 'r');
                $content = stream_get_contents($content);