135 lines
3.2 KiB
PHP
135 lines
3.2 KiB
PHP
<?php
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/**
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* PrivateBin
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*
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* a zero-knowledge paste bin
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*
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* @link https://github.com/PrivateBin/PrivateBin
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* @copyright 2012 Sébastien SAUVAGE (sebsauvage.net)
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* @license https://www.opensource.org/licenses/zlib-license.php The zlib/libpng License
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* @version 1.3.5
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*/
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namespace PrivateBin\Persistence;
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use Exception;
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/**
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* AbstractPersistence
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*
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* persists data in PHP files
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*/
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abstract class AbstractPersistence
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{
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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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/**
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* set the path
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*
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* @access public
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* @static
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* @param string $path
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*/
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public static function setPath($path)
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{
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self::$_path = $path;
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}
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/**
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* get the path
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*
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* @access public
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* @static
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* @param string $filename
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* @return string
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*/
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public static function getPath($filename = null)
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{
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if (strlen($filename)) {
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return self::$_path . DIRECTORY_SEPARATOR . $filename;
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} else {
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return self::$_path;
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}
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}
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/**
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* checks if the file exists
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*
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* @access protected
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* @static
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* @param string $filename
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* @return bool
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*/
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protected static function _exists($filename)
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{
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self::_initialize();
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return is_file(self::$_path . DIRECTORY_SEPARATOR . $filename);
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}
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/**
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* prepares path for storage
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*
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* @access protected
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* @static
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* @throws Exception
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*/
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protected static function _initialize()
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{
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// Create storage directory if it does not exist.
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if (!is_dir(self::$_path)) {
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if (!@mkdir(self::$_path, 0700)) {
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throw new Exception('unable to create directory ' . self::$_path, 10);
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}
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}
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$file = self::$_path . DIRECTORY_SEPARATOR . '.htaccess';
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if (!is_file($file)) {
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$writtenBytes = 0;
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if ($fileCreated = @touch($file)) {
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$writtenBytes = @file_put_contents(
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$file,
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'Require all denied' . PHP_EOL,
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LOCK_EX
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);
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}
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if ($fileCreated === false || $writtenBytes === false || $writtenBytes < 19) {
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throw new Exception('unable to write to file ' . $file, 11);
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}
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}
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}
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/**
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* store the data
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*
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* @access protected
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* @static
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* @param string $filename
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* @param string $data
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* @throws Exception
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* @return string
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*/
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protected static function _store($filename, $data)
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{
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self::_initialize();
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$file = self::$_path . DIRECTORY_SEPARATOR . $filename;
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$fileCreated = true;
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$writtenBytes = 0;
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if (!is_file($file)) {
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$fileCreated = @touch($file);
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}
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if ($fileCreated) {
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$writtenBytes = @file_put_contents($file, $data, LOCK_EX);
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}
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if ($fileCreated === false || $writtenBytes === false || $writtenBytes < strlen($data)) {
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throw new Exception('unable to write to file ' . $file, 13);
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}
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@chmod($file, 0640); // protect file access
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return $file;
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}
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}
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