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<?php
/**
* @package Joomla.Platform
* @subpackage FileSystem
*
* @copyright Copyright (C) 2005 - 2012 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('JPATH_PLATFORM') or die;
/**
* File system helper
*
* Holds support functions for the filesystem, particularly the stream
*
* @package Joomla.Platform
* @subpackage FileSystem
* @since 11.1
*/
class JFilesystemHelper
{
/**
* Remote file size function for streams that don't support it
*
* @param string $url TODO Add text
*
* @return mixed
*
* @see http://www.php.net/manual/en/function.filesize.php#71098
* @since 11.1
*/
public static function remotefsize($url)
{
$sch = parse_url($url, PHP_URL_SCHEME);
if (($sch != 'http') && ($sch != 'https') && ($sch != 'ftp') && ($sch != 'ftps'))
{
return false;
}
if (($sch == 'http') || ($sch == 'https'))
{
$headers = get_headers($url, 1);
if ((!array_key_exists('Content-Length', $headers)))
{
return false;
}
return $headers['Content-Length'];
}
if (($sch == 'ftp') || ($sch == 'ftps'))
{
$server = parse_url($url, PHP_URL_HOST);
$port = parse_url($url, PHP_URL_PORT);
$path = parse_url($url, PHP_URL_PATH);
$user = parse_url($url, PHP_URL_USER);
$pass = parse_url($url, PHP_URL_PASS);
if ((!$server) || (!$path))
{
return false;
}
if (!$port)
{
$port = 21;
}
if (!$user)
{
$user = 'anonymous';
}
if (!$pass)
{
$pass = '';
}
switch ($sch)
{
case 'ftp':
$ftpid = ftp_connect($server, $port);
break;
case 'ftps':
$ftpid = ftp_ssl_connect($server, $port);
break;
}
if (!$ftpid)
{
return false;
}
$login = ftp_login($ftpid, $user, $pass);
if (!$login)
{
return false;
}
$ftpsize = ftp_size($ftpid, $path);
ftp_close($ftpid);
if ($ftpsize == -1)
{
return false;
}
return $ftpsize;
}
}
/**
* Quick FTP chmod
*
* @param string $url Link identifier
* @param integer $mode The new permissions, given as an octal value.
*
* @return mixed
*
* @see http://www.php.net/manual/en/function.ftp-chmod.php
* @since 11.1
*/
public static function ftpChmod($url, $mode)
{
$sch = parse_url($url, PHP_URL_SCHEME);
if (($sch != 'ftp') && ($sch != 'ftps'))
{
return false;
}
$server = parse_url($url, PHP_URL_HOST);
$port = parse_url($url, PHP_URL_PORT);
$path = parse_url($url, PHP_URL_PATH);
$user = parse_url($url, PHP_URL_USER);
$pass = parse_url($url, PHP_URL_PASS);
if ((!$server) || (!$path))
{
return false;
}
if (!$port)
{
$port = 21;
}
if (!$user)
{
$user = 'anonymous';
}
if (!$pass)
{
$pass = '';
}
switch ($sch)
{
case 'ftp':
$ftpid = ftp_connect($server, $port);
break;
case 'ftps':
$ftpid = ftp_ssl_connect($server, $port);
break;
}
if (!$ftpid)
{
return false;
}
$login = ftp_login($ftpid, $user, $pass);
if (!$login)
{
return false;
}
$res = ftp_chmod($ftpid, $mode, $path);
ftp_close($ftpid);
return $res;
}
/**
* Modes that require a write operation
*
* @return array
*
* @since 11.1
*/
public static function getWriteModes()
{
return array('w', 'w+', 'a', 'a+', 'r+', 'x', 'x+');
}
/**
* Stream and Filter Support Operations
*
* Returns the supported streams, in addition to direct file access
* Also includes Joomla! streams as well as PHP streams
*
* @return array Streams
*
* @since 11.1
*/
public static function getSupported()
{
// Really quite cool what php can do with arrays when you let it...
static $streams;
if (!$streams)
{
$streams = array_merge(stream_get_wrappers(), self::getJStreams());
}
return $streams;
}
/**
* Returns a list of transports
*
* @return array
*
* @since 11.1
*/
public static function getTransports()
{
// Is this overkill?
return stream_get_transports();
}
/**
* Returns a list of filters
*
* @return array
*
* @since 11.1
*/
public static function getFilters()
{
// Note: This will look like the getSupported() function with J! filters.
// TODO: add user space filter loading like user space stream loading
return stream_get_filters();
}
/**
* Returns a list of J! streams
*
* @return array
*
* @since 11.1
*/
public static function getJStreams()
{
static $streams = array();
if (!$streams)
{
$files = new DirectoryIterator(__DIR__ . '/streams');
foreach ($files as $file)
{
$filename = $file->getFilename();
// Only load for php files.
// Note: DirectoryIterator::getExtension only available PHP >= 5.3.6
if (!$file->isFile() || substr($filename, strrpos($filename, '.') + 1) != 'php')
{
continue;
}
$streams[] = $file->getBasename('.php');
}
}
return $streams;
}
/**
* Determine if a stream is a Joomla stream.
*
* @param string $streamname The name of a stream
*
* @return boolean True for a Joomla Stream
*
* @since 11.1
*/
public static function isJoomlaStream($streamname)
{
return in_array($streamname, self::getJStreams());
}
}
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