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Edit File: File.php

<?php
/**
 * Token tracking implementation for local files.
 *
 * Copyright 1999-2016 Horde LLC (http://www.horde.org/)
 *
 * See the enclosed file COPYING for license information (LGPL). If you
 * did not receive this file, see http://www.horde.org/licenses/lgpl21.
 *
 * @author   Max Kalika <max@horde.org>
 * @category Horde
 * @package  Token
 */
class Horde_Token_File extends Horde_Token_Base
{
    /* File prefix constant. */
    const FILE_PREFIX = 'conn_';

/**
     * Handle for the open file descriptor.
     *
     * @var resource
     */
    protected $_fd = false;

/**
     * Boolean indicating whether or not we have an open file descriptor.
     *
     * @var boolean
     */
    protected $_connected = false;

/**
     * Constructor.
     *
     * @see Horde_Token_Base::__construct() for more parameters.
     *
     * @param array $params  Optional parameters:
     * - token_dir (string): The directory where to keep token files.
     *                       DEFAULT: System temporary directory
     */
    public function __construct($params = array())
    {
        $params = array_merge(array(
            'token_dir' => sys_get_temp_dir()
        ), $params);

parent::__construct($params);
    }

/**
     * Destructor.
     */
    public function __destruct()
    {
        try {
            $this->_disconnect(false);
        } catch (Horde_Token_Exception $e) {
        }
    }

/**
     * Delete all expired connection IDs.
     *
     * @throws Horde_Token_Exception
     */
    public function purge()
    {
        // Make sure we have no open file descriptors before unlinking
        // files.
        $this->_disconnect();

/* Build stub file list. */
        try {
            $di = new DirectoryIterator($this->_params['token_dir']);
        } catch (UnexpectedValueException $e) {
            throw new Horde_Token_Exception('Unable to open token directory');
        }

/* Find expired stub files */
        foreach ($di as $val) {
            if ($val->isFile() &&
                (strpos($val, self::FILE_PREFIX) === 0) &&
                (time() - $val->getMTime() >= $this->_params['timeout']) &&
                !@unlink($val->getPathname())) {
                throw new Horde_Token_Exception('Unable to purge token file.');
            }
        }
    }

/**
     * Does the token exist?
     *
     * @param string $tokenID  Token ID.
     *
     * @return boolean  True if the token exists.
     * @throws Horde_Token_Exception
     */
    public function exists($tokenID)
    {
        $this->_connect();

/* Find already used IDs. */
        $token = base64_encode($tokenID);
        foreach (file($this->_params['token_dir'] . '/' . self::FILE_PREFIX . $this->_encodeRemoteAddress()) as $val) {
            if (rtrim($val) == $token) {
                return true;
            }
        }

return false;
    }

/**
     * Add a token ID.
     *
     * @param string $tokenID  Token ID to add.
     *
     * @throws Horde_Token_Exception
     */
    public function add($tokenID)
    {
        $this->_connect();

/* Write the entry. */
        $token = base64_encode($tokenID);
        fwrite($this->_fd, $token . "\n");

$this->_disconnect();
    }

/**
     * Opens a file descriptor to a new or existing file.
     *
     * @throws Horde_Token_Exception
     */
    protected function _connect()
    {
        if ($this->_connected) {
            return;
        }

// Open a file descriptor to the token stub file.
        $this->_fd = @fopen($this->_params['token_dir'] . '/' . self::FILE_PREFIX . $this->_encodeRemoteAddress(), 'a');
        if (!$this->_fd) {
            throw new Horde_Token_Exception('Failed to open token file.');
        }

$this->_connected = true;
    }

/**
     * Closes the file descriptor.
     *
     * @param boolean $error  Throw exception on error?
     *
     * @throws Horde_Token_Exception
     */
    protected function _disconnect($error = true)
    {
        if ($this->_connected) {
            $this->_connected = false;
            if (!fclose($this->_fd) && $error) {
                throw new Horde_Token_Exception('Unable to close file descriptors');
            }
        }
    }

}