98 lines
2.7 KiB
PHP
98 lines
2.7 KiB
PHP
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<?php
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/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; under version 2
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* of the License (non-upgradable).
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright (c) 2014 (original work) Open Assessment Technologies SA;
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*
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*
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*/
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namespace oat\taoQtiItem\helpers;
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use \ZipArchive;
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use \tao_helpers_File;
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use \common_Exception;
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/**
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* @access public
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* @package tao
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*/
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class QtiPackage
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{
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public static function isValidZip($source)
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{
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$returnValue = false;
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if (!file_exists($source)) {
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throw new common_Exception("File {$source} not found.");
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}
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if (!is_readable($source)) {
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throw new common_Exception("Unable to read file {$source}.");
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}
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if (!tao_helpers_File::securityCheck($source)) {
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throw new common_Exception("{$source} seems to contain some security issues");
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}
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$zip = new ZipArchive();
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//check the archive opening and the consistency
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$res = $zip->open($source, ZIPARCHIVE::CHECKCONS);
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if ($res !== true) {
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switch ($res) {
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case ZipArchive::ER_NOZIP:
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$msg = 'not a zip archive';
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break;
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case ZipArchive::ER_INCONS:
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$msg = 'consistency check failed';
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break;
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case ZipArchive::ER_CRC:
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$msg = 'checksum failed';
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break;
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default:
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$msg = 'Bad Zip file';
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}
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throw new common_Exception($msg);
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} else {
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$returnValue = true;
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}
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$zip->close();
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return $returnValue;
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}
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public static function isValidQtiZip($source)
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{
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$returnValue = false;
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if (self::isValidZip($source)) {
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$zip = new ZipArchive();
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$zip->open($source, ZIPARCHIVE::CHECKCONS);
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if ($zip->locateName("imsmanifest.xml") === false) {
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throw new common_Exception("A QTI package must contains a imsmanifest.xml file at the root of the archive");
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} else {
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$returnValue = true;
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}
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$zip->close();
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}
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return $returnValue;
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}
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}
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