2012-04-29 17:15:06 +00:00
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<?php
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/**
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2016-07-11 09:58:15 +00:00
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* PrivateBin
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2012-04-29 17:15:06 +00:00
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*
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* a zero-knowledge paste bin
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*
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2016-07-11 09:58:15 +00:00
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* @link https://github.com/PrivateBin/PrivateBin
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2012-04-29 17:15:06 +00:00
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* @copyright 2012 Sébastien SAUVAGE (sebsauvage.net)
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2016-07-19 11:56:52 +00:00
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* @license https://www.opensource.org/licenses/zlib-license.php The zlib/libpng License
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2021-04-05 14:44:12 +00:00
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* @version 1.3.5
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2012-04-29 17:15:06 +00:00
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*/
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2016-12-12 17:43:23 +00:00
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2016-12-12 17:49:08 +00:00
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namespace PrivateBin\Data;
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2016-08-09 09:54:42 +00:00
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2021-06-07 04:53:15 +00:00
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use Exception;
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use PrivateBin\Json;
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2016-07-21 15:09:48 +00:00
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2012-04-29 17:15:06 +00:00
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/**
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2016-08-09 09:54:42 +00:00
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* Filesystem
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2012-04-29 17:15:06 +00:00
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*
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2016-08-09 09:54:42 +00:00
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* Model for filesystem data access, implemented as a singleton.
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2012-04-29 17:15:06 +00:00
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*/
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2016-08-09 09:54:42 +00:00
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class Filesystem extends AbstractData
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2012-04-29 17:15:06 +00:00
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{
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2021-06-07 04:53:15 +00:00
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/**
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* first line in file, to protect its contents
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*
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* @const string
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*/
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const PROTECTION_LINE = '<?php http_response_code(403); /*';
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/**
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* path in which to persist something
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*
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* @access private
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* @static
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* @var string
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*/
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private static $_path = 'data';
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2021-06-08 05:49:22 +00:00
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/**
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* cache for the traffic limiter
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*
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* @access private
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* @static
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* @var array
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*/
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private static $_traffic_limiter_cache = array();
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2012-04-29 17:15:06 +00:00
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/**
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* get instance of singleton
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*
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* @access public
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* @static
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2015-08-16 13:55:31 +00:00
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* @param array $options
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2016-08-09 09:54:42 +00:00
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* @return Filesystem
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2012-04-29 17:15:06 +00:00
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*/
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2019-05-10 19:35:36 +00:00
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public static function getInstance(array $options)
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2012-04-29 17:15:06 +00:00
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{
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2017-03-24 20:30:08 +00:00
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// if needed initialize the singleton
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if (!(self::$_instance instanceof self)) {
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self::$_instance = new self;
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}
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2012-04-30 11:58:29 +00:00
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// if given update the data directory
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if (
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2015-08-27 19:41:21 +00:00
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is_array($options) &&
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array_key_exists('dir', $options)
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2016-07-26 06:19:35 +00:00
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) {
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2021-06-07 04:53:15 +00:00
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self::$_path = $options['dir'];
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2012-04-29 17:15:06 +00:00
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}
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2012-08-25 22:49:11 +00:00
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return self::$_instance;
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2012-04-29 17:15:06 +00:00
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}
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/**
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* Create a paste.
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*
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* @access public
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* @param string $pasteid
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* @param array $paste
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2015-09-03 20:55:36 +00:00
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* @return bool
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2012-04-29 17:15:06 +00:00
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*/
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2019-05-10 19:35:36 +00:00
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public function create($pasteid, array $paste)
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2012-04-29 17:15:06 +00:00
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{
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$storagedir = self::_dataid2path($pasteid);
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2017-10-08 09:03:17 +00:00
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$file = $storagedir . $pasteid . '.php';
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2017-03-24 22:42:11 +00:00
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if (is_file($file)) {
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2016-07-26 06:19:35 +00:00
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return false;
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}
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if (!is_dir($storagedir)) {
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2016-08-09 09:54:42 +00:00
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mkdir($storagedir, 0700, true);
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2016-07-26 06:19:35 +00:00
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}
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2021-06-07 04:53:15 +00:00
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return self::_store($file, $paste);
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2012-04-29 17:15:06 +00:00
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}
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/**
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* Read a paste.
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*
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* @access public
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* @param string $pasteid
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2019-05-08 20:11:21 +00:00
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* @return array|false
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2012-04-29 17:15:06 +00:00
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*/
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public function read($pasteid)
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{
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2016-07-26 06:19:35 +00:00
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if (!$this->exists($pasteid)) {
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return false;
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}
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2019-05-08 20:11:21 +00:00
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return self::upgradePreV1Format(
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2021-06-07 04:53:15 +00:00
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self::_get(self::_dataid2path($pasteid) . $pasteid . '.php')
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2019-05-08 20:11:21 +00:00
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);
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2012-04-29 17:15:06 +00:00
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}
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/**
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* Delete a paste and its discussion.
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*
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* @access public
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* @param string $pasteid
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*/
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public function delete($pasteid)
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{
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2016-08-09 09:54:42 +00:00
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$pastedir = self::_dataid2path($pasteid);
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if (is_dir($pastedir)) {
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// Delete the paste itself.
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2017-10-08 09:03:17 +00:00
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if (is_file($pastedir . $pasteid . '.php')) {
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unlink($pastedir . $pasteid . '.php');
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2016-08-09 09:54:42 +00:00
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}
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2012-04-29 17:15:06 +00:00
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2016-08-09 09:54:42 +00:00
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// Delete discussion if it exists.
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$discdir = self::_dataid2discussionpath($pasteid);
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if (is_dir($discdir)) {
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// Delete all files in discussion directory
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$dir = dir($discdir);
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while (false !== ($filename = $dir->read())) {
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if (is_file($discdir . $filename)) {
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unlink($discdir . $filename);
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}
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2016-07-26 06:19:35 +00:00
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}
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2016-08-09 09:54:42 +00:00
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$dir->close();
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rmdir($discdir);
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2012-04-29 17:15:06 +00:00
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}
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}
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}
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/**
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* Test if a paste exists.
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*
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* @access public
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2016-07-19 12:44:17 +00:00
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* @param string $pasteid
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2016-08-09 11:07:11 +00:00
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* @return bool
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2012-04-29 17:15:06 +00:00
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*/
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2019-05-10 19:52:14 +00:00
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public function exists($pasteid)
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2012-04-29 17:15:06 +00:00
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{
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2017-10-08 09:03:17 +00:00
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$basePath = self::_dataid2path($pasteid) . $pasteid;
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$pastePath = $basePath . '.php';
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// convert to PHP protected files if needed
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if (is_readable($basePath)) {
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2021-06-07 04:53:15 +00:00
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self::_prependRename($basePath, $pastePath);
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2017-10-08 09:03:17 +00:00
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// convert comments, too
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2017-10-08 17:16:09 +00:00
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$discdir = self::_dataid2discussionpath($pasteid);
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2017-10-08 09:03:17 +00:00
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if (is_dir($discdir)) {
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$dir = dir($discdir);
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while (false !== ($filename = $dir->read())) {
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if (substr($filename, -4) !== '.php' && strlen($filename) >= 16) {
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$commentFilename = $discdir . $filename . '.php';
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2021-06-07 04:53:15 +00:00
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self::_prependRename($discdir . $filename, $commentFilename);
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2017-10-08 09:03:17 +00:00
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}
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}
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$dir->close();
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}
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}
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return is_readable($pastePath);
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2012-04-29 17:15:06 +00:00
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}
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/**
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* Create a comment in a paste.
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*
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* @access public
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* @param string $pasteid
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* @param string $parentid
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* @param string $commentid
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* @param array $comment
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2015-09-03 20:55:36 +00:00
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* @return bool
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2012-04-29 17:15:06 +00:00
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*/
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2019-05-10 19:35:36 +00:00
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public function createComment($pasteid, $parentid, $commentid, array $comment)
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2012-04-29 17:15:06 +00:00
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{
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$storagedir = self::_dataid2discussionpath($pasteid);
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2017-10-08 09:03:17 +00:00
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$file = $storagedir . $pasteid . '.' . $commentid . '.' . $parentid . '.php';
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2017-03-24 22:42:11 +00:00
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if (is_file($file)) {
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2016-07-26 06:19:35 +00:00
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return false;
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}
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if (!is_dir($storagedir)) {
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2016-08-09 09:54:42 +00:00
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mkdir($storagedir, 0700, true);
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2016-07-26 06:19:35 +00:00
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}
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2021-06-07 04:53:15 +00:00
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return self::_store($file, $comment);
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2012-04-29 17:15:06 +00:00
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}
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/**
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* Read all comments of paste.
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*
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* @access public
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* @param string $pasteid
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* @return array
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*/
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public function readComments($pasteid)
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{
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$comments = array();
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2016-08-15 14:45:47 +00:00
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$discdir = self::_dataid2discussionpath($pasteid);
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2016-07-26 06:19:35 +00:00
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if (is_dir($discdir)) {
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2012-04-29 17:15:06 +00:00
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$dir = dir($discdir);
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2016-07-26 06:19:35 +00:00
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while (false !== ($filename = $dir->read())) {
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2017-10-08 09:03:17 +00:00
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// Filename is in the form pasteid.commentid.parentid.php:
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2012-04-29 17:15:06 +00:00
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// - pasteid is the paste this reply belongs to.
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// - commentid is the comment identifier itself.
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// - parentid is the comment this comment replies to (It can be pasteid)
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2016-07-26 06:19:35 +00:00
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if (is_file($discdir . $filename)) {
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2021-06-07 04:53:15 +00:00
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$comment = self::_get($discdir . $filename);
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2016-08-15 14:45:47 +00:00
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$items = explode('.', $filename);
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2012-04-29 17:15:06 +00:00
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// Add some meta information not contained in file.
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2019-05-10 05:55:39 +00:00
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$comment['id'] = $items[1];
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$comment['parentid'] = $items[2];
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2012-04-29 17:15:06 +00:00
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// Store in array
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2019-05-10 05:55:39 +00:00
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$key = $this->getOpenSlot($comments, (int) $comment['meta']['created']);
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2015-10-12 19:07:41 +00:00
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$comments[$key] = $comment;
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2012-04-29 17:15:06 +00:00
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}
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}
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$dir->close();
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// Sort comments by date, oldest first.
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ksort($comments);
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}
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return $comments;
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}
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/**
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* Test if a comment exists.
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*
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* @access public
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2016-07-19 12:44:17 +00:00
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* @param string $pasteid
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2012-04-29 17:15:06 +00:00
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* @param string $parentid
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* @param string $commentid
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2016-08-09 11:07:11 +00:00
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* @return bool
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2012-04-29 17:15:06 +00:00
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*/
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public function existsComment($pasteid, $parentid, $commentid)
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{
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return is_file(
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self::_dataid2discussionpath($pasteid) .
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2017-10-08 09:03:17 +00:00
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$pasteid . '.' . $commentid . '.' . $parentid . '.php'
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2012-04-29 17:15:06 +00:00
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);
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}
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2021-06-08 05:49:22 +00:00
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/**
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* Purge outdated entries.
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*
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* @access public
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* @param string $namespace
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* @param int $time
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* @return void
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*/
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public function purgeValues($namespace, $time)
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{
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switch ($namespace) {
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case 'traffic_limiter':
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foreach (self::$_traffic_limiter_cache as $key => $last_access) {
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if ($last_access <= $time) {
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unset(self::$_traffic_limiter_cache[$key]);
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}
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}
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break;
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}
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}
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2021-06-07 04:53:15 +00:00
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/**
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* Save a value.
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*
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* @access public
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* @param string $value
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* @param string $namespace
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* @param string $key
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* @return bool
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*/
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public function setValue($value, $namespace, $key = '')
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{
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2021-06-07 05:02:47 +00:00
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switch ($namespace) {
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case 'purge_limiter':
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2021-06-07 19:53:42 +00:00
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return self::_storeString(
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self::$_path . DIRECTORY_SEPARATOR . 'purge_limiter.php',
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'<?php' . PHP_EOL . '$GLOBALS[\'purge_limiter\'] = ' . $value . ';'
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);
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2021-06-07 05:02:47 +00:00
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break;
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case 'salt':
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;
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break;
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case 'traffic_limiter':
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2021-06-08 05:49:22 +00:00
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self::$_traffic_limiter_cache[$key] = $value;
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return self::_storeString(
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self::$_path . DIRECTORY_SEPARATOR . 'traffic_limiter.php',
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'<?php' . PHP_EOL . '$GLOBALS[\'purge_limiter\'] = ' . var_export(self::$_traffic_limiter_cache, true) . ';'
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);
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2021-06-07 05:02:47 +00:00
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break;
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}
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2021-06-07 19:53:42 +00:00
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return false;
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2021-06-07 04:53:15 +00:00
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}
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/**
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* Load a value.
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*
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* @access public
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* @param string $namespace
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* @param string $key
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* @return string
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*/
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public function getValue($namespace, $key = '')
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{
|
2021-06-07 19:53:42 +00:00
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switch ($namespace) {
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case 'purge_limiter':
|
|
|
|
$file = self::$_path . DIRECTORY_SEPARATOR . 'purge_limiter.php';
|
|
|
|
if (is_file($file)) {
|
|
|
|
require $file;
|
|
|
|
return $GLOBALS['purge_limiter'];
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case 'salt':
|
|
|
|
;
|
|
|
|
break;
|
|
|
|
case 'traffic_limiter':
|
2021-06-08 05:49:22 +00:00
|
|
|
$file = self::$_path . DIRECTORY_SEPARATOR . 'traffic_limiter.php';
|
|
|
|
if (is_file($file)) {
|
|
|
|
require $file;
|
|
|
|
self::$_traffic_limiter_cache = $GLOBALS['traffic_limiter'];
|
|
|
|
if (array_key_exists($key, self::$_traffic_limiter_cache)) {
|
|
|
|
return self::$_traffic_limiter_cache[$key];
|
|
|
|
}
|
|
|
|
}
|
2021-06-07 19:53:42 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
return '';
|
|
|
|
}
|
2021-06-07 04:53:15 +00:00
|
|
|
|
2021-06-07 19:53:42 +00:00
|
|
|
/**
|
|
|
|
* get the data
|
|
|
|
*
|
|
|
|
* @access public
|
|
|
|
* @static
|
|
|
|
* @param string $filename
|
|
|
|
* @return array|false $data
|
|
|
|
*/
|
|
|
|
private static function _get($filename)
|
|
|
|
{
|
|
|
|
return Json::decode(
|
|
|
|
substr(
|
|
|
|
file_get_contents($filename),
|
|
|
|
strlen(self::PROTECTION_LINE . PHP_EOL)
|
|
|
|
)
|
|
|
|
);
|
2021-06-07 04:53:15 +00:00
|
|
|
}
|
|
|
|
|
2016-07-15 15:02:59 +00:00
|
|
|
/**
|
|
|
|
* Returns up to batch size number of paste ids that have expired
|
|
|
|
*
|
|
|
|
* @access private
|
|
|
|
* @param int $batchsize
|
|
|
|
* @return array
|
|
|
|
*/
|
2019-05-10 19:52:14 +00:00
|
|
|
protected function _getExpiredPastes($batchsize)
|
2016-07-15 15:02:59 +00:00
|
|
|
{
|
2016-08-15 14:45:47 +00:00
|
|
|
$pastes = array();
|
2016-07-15 15:02:59 +00:00
|
|
|
$firstLevel = array_filter(
|
2021-06-07 04:53:15 +00:00
|
|
|
scandir(self::$_path),
|
2016-08-09 09:54:42 +00:00
|
|
|
'self::_isFirstLevelDir'
|
2016-07-15 15:02:59 +00:00
|
|
|
);
|
2016-07-26 06:19:35 +00:00
|
|
|
if (count($firstLevel) > 0) {
|
2016-07-15 15:02:59 +00:00
|
|
|
// try at most 10 times the $batchsize pastes before giving up
|
2016-07-26 06:19:35 +00:00
|
|
|
for ($i = 0, $max = $batchsize * 10; $i < $max; ++$i) {
|
2016-08-15 14:45:47 +00:00
|
|
|
$firstKey = array_rand($firstLevel);
|
2016-07-15 15:02:59 +00:00
|
|
|
$secondLevel = array_filter(
|
2021-06-07 04:53:15 +00:00
|
|
|
scandir(self::$_path . DIRECTORY_SEPARATOR . $firstLevel[$firstKey]),
|
2016-08-09 09:54:42 +00:00
|
|
|
'self::_isSecondLevelDir'
|
2016-07-15 15:02:59 +00:00
|
|
|
);
|
|
|
|
|
|
|
|
// skip this folder in the next checks if it is empty
|
2016-07-26 06:19:35 +00:00
|
|
|
if (count($secondLevel) == 0) {
|
2016-07-15 15:02:59 +00:00
|
|
|
unset($firstLevel[$firstKey]);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
$secondKey = array_rand($secondLevel);
|
2021-06-07 04:53:15 +00:00
|
|
|
$path = self::$_path . DIRECTORY_SEPARATOR .
|
2017-03-24 22:42:11 +00:00
|
|
|
$firstLevel[$firstKey] . DIRECTORY_SEPARATOR .
|
|
|
|
$secondLevel[$secondKey];
|
2016-07-26 06:19:35 +00:00
|
|
|
if (!is_dir($path)) {
|
|
|
|
continue;
|
|
|
|
}
|
2016-07-15 15:02:59 +00:00
|
|
|
$thirdLevel = array_filter(
|
2017-10-08 09:03:17 +00:00
|
|
|
array_map(
|
2017-10-08 09:31:41 +00:00
|
|
|
function ($filename) {
|
2017-10-08 09:03:17 +00:00
|
|
|
return strlen($filename) >= 20 ?
|
|
|
|
substr($filename, 0, -4) :
|
|
|
|
$filename;
|
|
|
|
},
|
|
|
|
scandir($path)
|
|
|
|
),
|
2016-08-09 09:54:42 +00:00
|
|
|
'PrivateBin\\Model\\Paste::isValidId'
|
2016-07-15 15:02:59 +00:00
|
|
|
);
|
2016-07-26 06:19:35 +00:00
|
|
|
if (count($thirdLevel) == 0) {
|
|
|
|
continue;
|
|
|
|
}
|
2016-07-15 15:02:59 +00:00
|
|
|
$thirdKey = array_rand($thirdLevel);
|
2016-08-15 14:45:47 +00:00
|
|
|
$pasteid = $thirdLevel[$thirdKey];
|
2016-07-26 06:19:35 +00:00
|
|
|
if (in_array($pasteid, $pastes)) {
|
|
|
|
continue;
|
|
|
|
}
|
2016-07-15 15:02:59 +00:00
|
|
|
|
2016-07-26 06:19:35 +00:00
|
|
|
if ($this->exists($pasteid)) {
|
2016-07-15 15:02:59 +00:00
|
|
|
$data = $this->read($pasteid);
|
|
|
|
if (
|
2019-05-10 05:55:39 +00:00
|
|
|
array_key_exists('expire_date', $data['meta']) &&
|
|
|
|
$data['meta']['expire_date'] < time()
|
2016-07-26 06:19:35 +00:00
|
|
|
) {
|
2016-07-15 15:02:59 +00:00
|
|
|
$pastes[] = $pasteid;
|
2016-07-26 06:19:35 +00:00
|
|
|
if (count($pastes) >= $batchsize) {
|
|
|
|
break;
|
|
|
|
}
|
2016-07-15 15:02:59 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return $pastes;
|
|
|
|
}
|
|
|
|
|
2012-04-29 17:15:06 +00:00
|
|
|
/**
|
|
|
|
* Convert paste id to storage path.
|
|
|
|
*
|
|
|
|
* The idea is to creates subdirectories in order to limit the number of files per directory.
|
|
|
|
* (A high number of files in a single directory can slow things down.)
|
|
|
|
* eg. "f468483c313401e8" will be stored in "data/f4/68/f468483c313401e8"
|
|
|
|
* High-trafic websites may want to deepen the directory structure (like Squid does).
|
|
|
|
*
|
|
|
|
* eg. input 'e3570978f9e4aa90' --> output 'data/e3/57/'
|
|
|
|
*
|
|
|
|
* @access private
|
|
|
|
* @static
|
|
|
|
* @param string $dataid
|
2016-08-09 11:07:11 +00:00
|
|
|
* @return string
|
2012-04-29 17:15:06 +00:00
|
|
|
*/
|
|
|
|
private static function _dataid2path($dataid)
|
|
|
|
{
|
2021-06-07 04:53:15 +00:00
|
|
|
return self::$_path . DIRECTORY_SEPARATOR .
|
2017-03-24 22:42:11 +00:00
|
|
|
substr($dataid, 0, 2) . DIRECTORY_SEPARATOR .
|
2021-06-07 04:53:15 +00:00
|
|
|
substr($dataid, 2, 2) . DIRECTORY_SEPARATOR;
|
2012-04-29 17:15:06 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Convert paste id to discussion storage path.
|
|
|
|
*
|
|
|
|
* eg. input 'e3570978f9e4aa90' --> output 'data/e3/57/e3570978f9e4aa90.discussion/'
|
|
|
|
*
|
|
|
|
* @access private
|
|
|
|
* @static
|
|
|
|
* @param string $dataid
|
2016-08-09 11:07:11 +00:00
|
|
|
* @return string
|
2012-04-29 17:15:06 +00:00
|
|
|
*/
|
|
|
|
private static function _dataid2discussionpath($dataid)
|
|
|
|
{
|
2016-07-18 12:47:32 +00:00
|
|
|
return self::_dataid2path($dataid) . $dataid .
|
|
|
|
'.discussion' . DIRECTORY_SEPARATOR;
|
2012-04-29 17:15:06 +00:00
|
|
|
}
|
2016-07-15 15:02:59 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Check that the given element is a valid first level directory.
|
|
|
|
*
|
|
|
|
* @access private
|
|
|
|
* @static
|
|
|
|
* @param string $element
|
|
|
|
* @return bool
|
|
|
|
*/
|
|
|
|
private static function _isFirstLevelDir($element)
|
|
|
|
{
|
2016-07-18 12:47:32 +00:00
|
|
|
return self::_isSecondLevelDir($element) &&
|
2021-06-07 04:53:15 +00:00
|
|
|
is_dir(self::$_path . DIRECTORY_SEPARATOR . $element);
|
2016-07-15 15:02:59 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Check that the given element is a valid second level directory.
|
|
|
|
*
|
|
|
|
* @access private
|
|
|
|
* @static
|
|
|
|
* @param string $element
|
|
|
|
* @return bool
|
|
|
|
*/
|
|
|
|
private static function _isSecondLevelDir($element)
|
|
|
|
{
|
|
|
|
return (bool) preg_match('/^[a-f0-9]{2}$/', $element);
|
|
|
|
}
|
2021-06-07 04:53:15 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* store the data
|
|
|
|
*
|
|
|
|
* @access public
|
|
|
|
* @static
|
|
|
|
* @param string $filename
|
|
|
|
* @param array $data
|
|
|
|
* @return bool
|
|
|
|
*/
|
2021-06-07 19:53:42 +00:00
|
|
|
private static function _store($filename, array $data)
|
2021-06-07 04:53:15 +00:00
|
|
|
{
|
2021-06-07 19:53:42 +00:00
|
|
|
try {
|
|
|
|
return self::_storeString(
|
|
|
|
$filename,
|
|
|
|
self::PROTECTION_LINE . PHP_EOL . Json::encode($data)
|
|
|
|
);
|
|
|
|
} catch (Exception $e) {
|
|
|
|
return false;
|
2021-06-07 04:53:15 +00:00
|
|
|
}
|
2021-06-07 19:53:42 +00:00
|
|
|
}
|
2021-06-07 04:53:15 +00:00
|
|
|
|
2021-06-07 19:53:42 +00:00
|
|
|
/**
|
|
|
|
* store a string
|
|
|
|
*
|
|
|
|
* @access public
|
|
|
|
* @static
|
|
|
|
* @param string $filename
|
|
|
|
* @param string $data
|
|
|
|
* @return bool
|
|
|
|
*/
|
|
|
|
private static function _storeString($filename, $data)
|
|
|
|
{
|
2021-06-07 04:53:15 +00:00
|
|
|
// Create storage directory if it does not exist.
|
|
|
|
if (!is_dir(self::$_path)) {
|
|
|
|
if (!@mkdir(self::$_path, 0700)) {
|
2021-06-07 19:53:42 +00:00
|
|
|
return false;
|
2021-06-07 04:53:15 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
$file = self::$_path . DIRECTORY_SEPARATOR . '.htaccess';
|
|
|
|
if (!is_file($file)) {
|
|
|
|
$writtenBytes = 0;
|
|
|
|
if ($fileCreated = @touch($file)) {
|
|
|
|
$writtenBytes = @file_put_contents(
|
|
|
|
$file,
|
|
|
|
'Require all denied' . PHP_EOL,
|
|
|
|
LOCK_EX
|
|
|
|
);
|
|
|
|
}
|
|
|
|
if ($fileCreated === false || $writtenBytes === false || $writtenBytes < 19) {
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
$fileCreated = true;
|
|
|
|
$writtenBytes = 0;
|
2021-06-07 19:53:42 +00:00
|
|
|
if (!is_file($filename)) {
|
|
|
|
$fileCreated = @touch($filename);
|
2021-06-07 04:53:15 +00:00
|
|
|
}
|
|
|
|
if ($fileCreated) {
|
2021-06-07 19:53:42 +00:00
|
|
|
$writtenBytes = @file_put_contents($filename, $data, LOCK_EX);
|
2021-06-07 04:53:15 +00:00
|
|
|
}
|
|
|
|
if ($fileCreated === false || $writtenBytes === false || $writtenBytes < strlen($data)) {
|
|
|
|
return false;
|
|
|
|
}
|
2021-06-07 19:53:42 +00:00
|
|
|
@chmod($filename, 0640); // protect file access
|
2021-06-07 04:53:15 +00:00
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* rename a file, prepending the protection line at the beginning
|
|
|
|
*
|
|
|
|
* @access public
|
|
|
|
* @static
|
|
|
|
* @param string $srcFile
|
|
|
|
* @param string $destFile
|
|
|
|
* @return void
|
|
|
|
*/
|
|
|
|
private static function _prependRename($srcFile, $destFile)
|
|
|
|
{
|
|
|
|
// don't overwrite already converted file
|
|
|
|
if (!is_readable($destFile)) {
|
|
|
|
$handle = fopen($srcFile, 'r', false, stream_context_create());
|
|
|
|
file_put_contents($destFile, self::PROTECTION_LINE . PHP_EOL);
|
|
|
|
file_put_contents($destFile, $handle, FILE_APPEND);
|
|
|
|
fclose($handle);
|
|
|
|
}
|
|
|
|
unlink($srcFile);
|
|
|
|
}
|
2012-04-29 17:15:06 +00:00
|
|
|
}
|