calling OC_Filesystem at this point will initialize file system with wrong user (for public shared links if another user is logged in). Therefore remove trailing slashes without the help of OC_Filesystem.

apps/files_sharing/public.php

@@ -24,12 +24,18 @@ if (isset($_GET['token'])) {
 if (isset($_GET['file']) || isset($_GET['dir'])) {
 	if (isset($_GET['dir'])) {
 		$type = 'folder';
-		$path = OC_Filesystem::normalizePath($_GET['dir']);
+		$path = $_GET['dir'];
+		if(strlen($path)>1 and substr($path,-1,1)==='/') {
+			$path=substr($path,0,-1);
+		}
 		$baseDir = $path;
 		$dir = $baseDir;
 	} else {
 		$type = 'file';
-		$path = OC_Filesystem::normalizePath($_GET['file']);
+		$path = $_GET['dir'];
+		if(strlen($path)>1 and substr($path,-1,1)==='/') {
+			$path=substr($path,0,-1);
+		}
 	}
 	$uidOwner = substr($path, 1, strpos($path, '/', 1) - 1);
 	if (OCP\User::userExists($uidOwner)) {