75 lines
2.3 KiB
PHP
75 lines
2.3 KiB
PHP
<?php
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/**
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* download.php, Kopano calendar to ics im/exporter
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*
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* Author: Christoph Haas <christoph.h@sprinternet.at>
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* Copyright (C) 2012-2016 Christoph Haas
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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namespace calendarimporter;
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class DownloadHandler
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{
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/**
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* Download the given vcf file.
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* @return boolean
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*/
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public static function doDownload()
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{
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if (isset($_GET["token"])) {
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$token = $_GET["token"];
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} else {
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return false;
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}
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if (isset($_GET["filename"])) {
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$filename = $_GET["filename"];
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} else {
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return false;
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}
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// validate token
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if (!preg_match('/^[a-zA-Z0-9]+$/', $token)) { // token is a md5 hash
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return false;
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}
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$file = PLUGIN_CALENDARIMPORTER_TMP_UPLOAD . "ics_" . $token . ".ics";
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if (!file_exists($file)) { // invalid token
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return false;
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}
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// set headers here
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header('Content-Disposition: attachment; filename="' . $filename . '"');
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// no caching
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header('Expires: 0'); // set expiration time
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header('Content-Description: File Transfer');
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header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
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header('Content-Length: ' . filesize($file));
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header('Content-Type: application/octet-stream');
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header('Pragma: public');
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flush();
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// print the downloaded file
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readfile($file);
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ignore_user_abort(true);
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unlink($file);
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return true;
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}
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} |