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<?php
/*
* $Horde: horde/lib/Token/file.php,v 1.4.2.3 2003/01/03 12:48:43 jan Exp $
*
* Copyright 1999-2003 Max Kalika <max@horde.org>
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
*/
/**
* Token tracking implementation for stub files.
*
* Optional values for $params:
* 'stub_dir' The directory where to keep connection stub files.
* 'timeout' The period (in seconds) after which an id is purged.
*
* @author Max Kalika <max@horde.org>
* @version $Revision: 1.4.2.3 $
* @since Horde 1.3
* @package horde.token
*/
class Token_file extends Token {
/** Handle for the open file descriptor. */
var $fd = '';
/** Boolean indicating whether or not we have an open file descriptor. */
var $connected = false;
/**
* Create a new file based tracking storage container.
*
* @param optional array $params A hash containing storage parameters.
*/
function Token_file($params = array())
{
$this->params = $params;
/* Choose the directory to save the stub files. */
if (!isset($this->params['stub_dir'])) {
if (ini_get('upload_tmp_dir')) {
$this->params['stub_dir'] = ini_get('upload_tmp_dir');
}
elseif (getenv('TMPDIR')) {
$this->params['stub_dir'] = getenv('TMPDIR');
}
else {
$this->params['stub_dir'] = '/tmp';
}
}
/* Set timeout to 24 hours if not specified. */
if (!isset($this->params['timeout'])) {
$this->params['timeout'] = 86400;
}
}
/**
* Opens a file descriptor to a new or existing file.
*
* @return bool TOKEN_OK on success, TOKEN_ERROR_* on failure.
*/
function connect()
{
if (!$this->connected) {
/*
* Open a file descriptor to the connection stub file.
*/
$this->fd = fopen($this->params['stub_dir'] . "/conn_" . $this->hexRemoteAddr(), "a");
if (!$this->fd) {
return TOKEN_ERROR_CONNECT;
}
$this->connected = true;
}
return TOKEN_OK;
}
/**
* Closes the file descriptor.
*
* @return bool true on success, false on failure.
*/
function disconnect()
{
if ($this->connected) {
$this->connected = false;
return fclose($this->fd);
}
return true;
}
/**
* Deletes all expired connection id's from the SQL server.
*
* @return bool TOKEN_OK on success, TOKEN_ERROR_* on failure.
*/
function purge()
{
/* If we're already connected, disconnect as we will be unlinking files. */
if ($this->connected) {
if ($this->disconnect()) return TOKEN_ERROR_CONNECT;
}
/* Build stub file list. */
if (!$dirFD = opendir($this->params['stub_dir'])) {
return TOKEN_ERROR_CONNECT;
}
/* Find expired stub files */
while (($dirEntry = readdir($dirFD)) != '') {
if (preg_match('|^conn_\w{8}$|', $dirEntry) && (time() - filemtime($this->params['stub_dir'] . "/" . $dirEntry) >= $this->params['timeout'])) {
if (!unlink($this->params['stub_dir'] . "/" . $dirEntry)) {
return TOKEN_ERROR;
}
}
}
closedir($dirFD);
return TOKEN_OK;
}
function exists($connID)
{
/* If we're already connected, disconnect as we will be reading one file. */
if ($this->connected) {
if ($this->disconnect()) return TOKEN_ERROR_CONNECT;
}
/* Find already used IDs */
$fileContents = @file($this->params['stub_dir'] . '/conn_' . $this->hexRemoteAddr());
if ($fileContents) {
for ($i = 0; $i < count($fileContents); $i++) {
if (chop($fileContents[$i]) == $connID) {
return true;
}
}
}
return false;
}
function add($connID)
{
/* If we're not already connected, invoke the connect(). */
if (!$this->connected) {
if ($this->connect() != TOKEN_OK) return TOKEN_ERROR_CONNECT;
}
/* Write the entry. */
fwrite($this->fd, "$connID\n");
/* Return an error if the update fails, too. */
if (!$this->disconnect()) return TOKEN_ERROR;
return TOKEN_OK;
}
}
?>
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