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<?php
/**
* Akeeba Engine
*
* @package akeebaengine
* @copyright Copyright (c)2006-2023 Nicholas K. Dionysopoulos / Akeeba Ltd
* @license GNU General Public License version 3, or later
*/
namespace Akeeba\Engine\Archiver;
defined('AKEEBAENGINE') || die();
use Akeeba\Engine\Factory;
use Akeeba\Engine\Util\Transfer\Ftp;
use Exception;
use RuntimeException;
/**
* Direct Transfer Over FTP archiver class
*
* Transfers the files to a remote FTP server instead of putting them in
* an archive
*
*/
class Directftp extends Base
{
/** @var bool Could we connect to the server? */
public $connect_ok = false;
/** @var Ftp FTP resource handle */
protected $ftpTransfer;
/** @var string FTP hostname */
protected $host;
/** @var string FTP port */
protected $port;
/** @var string FTP username */
protected $user;
/** @var string FTP password */
protected $pass;
/** @var bool Should we use FTP over SSL? */
protected $usessl;
/** @var bool Should we use passive FTP? */
protected $passive;
/** @var string FTP initial directory */
protected $initdir;
/**
* Initialises the archiver class, seeding the remote installation
* from an existent installer's JPA archive.
*
* @param string $targetArchivePath Absolute path to the generated archive (ignored in this class)
* @param array $options A named key array of options (optional)
*
* @return void
*/
public function initialize($targetArchivePath, $options = [])
{
Factory::getLog()->debug(__CLASS__ . " :: new instance");
$registry = Factory::getConfiguration();
$this->host = $registry->get('engine.archiver.directftp.host', '');
$this->port = $registry->get('engine.archiver.directftp.port', '21');
$this->user = $registry->get('engine.archiver.directftp.user', '');
$this->pass = $registry->get('engine.archiver.directftp.pass', '');
$this->initdir = $registry->get('engine.archiver.directftp.initial_directory', '');
$this->usessl = $registry->get('engine.archiver.directftp.ftps', false);
$this->passive = $registry->get('engine.archiver.directftp.passive_mode', true);
if (isset($options['host']))
{
$this->host = $options['host'];
}
if (isset($options['port']))
{
$this->port = $options['port'];
}
if (isset($options['user']))
{
$this->user = $options['user'];
}
if (isset($options['pass']))
{
$this->pass = $options['pass'];
}
if (isset($options['initdir']))
{
$this->initdir = $options['initdir'];
}
if (isset($options['usessl']))
{
$this->usessl = $options['usessl'];
}
if (isset($options['passive']))
{
$this->passive = $options['passive'];
}
// You can't fix stupid, but at least you get to shout at them
if (strtolower(substr($this->host, 0, 6)) == 'ftp://')
{
Factory::getLog()->warning('YOU ARE *** N O T *** SUPPOSED TO ENTER THE ftp:// PROTOCOL PREFIX IN THE FTP HOSTNAME FIELD OF THE DirectFTP ARCHIVER ENGINE.');
Factory::getLog()->warning('I am trying to fix your bad configuration setting, but the backup might fail anyway. You MUST fix this in your configuration.');
$this->host = substr($this->host, 6);
}
$this->connect_ok = $this->connectFTP();
Factory::getLog()->debug(__CLASS__ . " :: FTP connection status: " . ($this->connect_ok ? 'success' : 'FAIL'));
}
/**
* Returns a string with the extension (including the dot) of the files produced
* by this class.
*
* @return string
*/
public function getExtension()
{
return '';
}
public function finalize()
{
// Nothing to do
}
/**
* "Magic" function called just before serialization of the object. Disconnects
* from the FTP server and allows PHP to serialize like normal.
*
* @return array The variables to serialize
*/
public function _onSerialize()
{
// Explicitally unset the ftpTransfer class so the destructor magic method is called (and the connection is closed)
unset($this->ftpTransfer);
return array_keys(get_object_vars($this));
}
/**
* The most basic file transaction: add a single entry (file or directory) to
* the archive.
*
* @param bool $isVirtual If true, the next parameter contains file data instead of a file name
* @param string $sourceNameOrData Absolute file name to read data from or the file data itself is $isVirtual is
* true
* @param string $targetName The (relative) file name under which to store the file in the archive
*
* @return boolean True on success, false otherwise
*/
protected function _addFile($isVirtual, &$sourceNameOrData, $targetName)
{
// Are we connected to a server?
if (!$this->ftpTransfer)
{
if (!$this->connectFTP())
{
return false;
}
}
// See if it's a directory
$isDir = $isVirtual ? false : is_dir($sourceNameOrData);
if ($isDir)
{
// Just try to create the remote directory
return $this->makeDirectory($targetName);
}
else
{
// We have a file we need to upload
if ($isVirtual)
{
// Create a temporary file, upload, rename it
$tempFileName = Factory::getTempFiles()->createRegisterTempFile();
// Easy writing using file_put_contents
if (@file_put_contents($tempFileName, $sourceNameOrData) === false)
{
throw new RuntimeException('Could not store virtual file ' . $targetName . ' to ' . $tempFileName . ' using file_put_contents() before uploading.');
}
// Upload the temporary file under the final name
$res = $this->upload($tempFileName, $targetName);
// Remove the temporary file
Factory::getTempFiles()->unregisterAndDeleteTempFile($tempFileName, true);
return $res;
}
else
{
// Upload a file
return $this->upload($sourceNameOrData, $targetName);
}
}
}
/**
* Tries to connect to the remote FTP server and change into the initial directory
*
* @return bool True is connection successful, false otherwise
*
* @throws Exception
*/
protected function connectFTP()
{
Factory::getLog()->debug('Connecting to remote FTP');
$options = [
'host' => $this->host,
'port' => $this->port,
'username' => $this->user,
'password' => $this->pass,
'directory' => $this->initdir,
'ssl' => $this->usessl,
'passive' => $this->passive,
];
// Let the exceptions bubble up
$this->ftpTransfer = new Ftp($options);
return true;
}
/**
* Changes to the requested directory in the remote server. You give only the
* path relative to the initial directory and it does all the rest by itself,
* including doing nothing if the remote directory is the one we want. If the
* directory doesn't exist, it creates it.
*
* @param $dir string The (realtive) remote directory
*
* @return bool True if successful, false otherwise.
*/
protected function ftp_chdir($dir)
{
// Calculate "real" (absolute) FTP path
$realdir = $this->ftpTransfer->getPath($dir);
if ($this->initdir == $realdir)
{
// Already there, do nothing
return true;
}
$result = $this->ftpTransfer->isDir($realdir);
if ($result === false)
{
// The directory doesn't exist, let's try to create it...
if (!$this->makeDirectory($dir))
{
return false;
}
}
return true;
}
/**
* Recursively create a directory in the FTP server
*
* @param string $dir The directory to create
*
* @return bool True on success
*/
protected function makeDirectory($dir)
{
$alldirs = explode('/', $dir);
$previousDir = substr($this->initdir, -1) == '/' ? substr($this->initdir, 0, strlen($this->initdir) - 1) : $this->initdir;
$previousDir = substr($previousDir, 0, 1) == '/' ? $previousDir : '/' . $previousDir;
foreach ($alldirs as $curdir)
{
$check = $previousDir . '/' . $curdir;
if (!$this->ftpTransfer->isDir($check))
{
if (@$this->ftpTransfer->mkdir($check) === false)
{
throw new RuntimeException('Could not create directory ' . $dir);
}
}
$previousDir = $check;
}
return true;
}
/**
* Uploads a file to the remote server
*
* @param $sourceName string The absolute path to the source local file
* @param $targetName string The relative path to the targer remote file
*
* @return bool True if successful
*/
protected function upload($sourceName, $targetName)
{
// Try to change into the remote directory, possibly creating it if it doesn't exist
$dir = dirname($targetName);
if (!$this->ftp_chdir($dir))
{
return false;
}
// Upload
$realdir = substr($this->initdir, -1) == '/' ? substr($this->initdir, 0, strlen($this->initdir) - 1) : $this->initdir;
$realdir .= '/' . $dir;
$realdir = substr($realdir, 0, 1) == '/' ? $realdir : '/' . $realdir;
$realname = $realdir . '/' . basename($targetName);
try
{
$res = $this->ftpTransfer->upload($sourceName, $realname);
}
catch (RuntimeException $e)
{
$res = false;
}
if (!$res)
{
// If the file was unreadable, just skip it...
if (is_readable($sourceName))
{
throw new RuntimeException('Uploading ' . $targetName . ' has failed.');
}
Factory::getLog()->warning('Uploading ' . $targetName . ' has failed because the file is unreadable.');
return true;
}
$this->ftpTransfer->chmod($realdir, 0644);
return true;
}
}