Your IP : 216.73.216.240
<?php
/**
* @package AkeebaBackup
* @copyright Copyright (c)2006-2016 Nicholas K. Dionysopoulos
* @license GNU General Public License version 3, or later
*/
namespace Akeeba\Backup\Admin\Model;
// Protect from unauthorized access
defined('_JEXEC') or die();
use Akeeba\Engine\Factory;
use Akeeba\Engine\Platform;
use FOF30\Model\Model;
use JText;
class RemoteFiles extends Model
{
/**
* Returns an icon definition list for the applicable actions on this backup record
*
* @return array
*/
function getActions()
{
$id = $this->getState('id', -1);
$actions = array();
// Load the stats record
$stat = Platform::getInstance()->get_statistics($id);
// Get the post-proc engine from the remote location
$remote_filename = $stat['remote_filename'];
if (empty($remote_filename))
{
return $actions;
}
$remoteFilenameParts = explode('://', $remote_filename, 2);
$postProcEngine = Factory::getPostprocEngine($remoteFilenameParts[0]);
// Does the engine support local d/l and we need to d/l the file locally?
if ($postProcEngine->can_download_to_file && !$stat['filesexist'])
{
// Add a "Fetch back to server" button
$action = array(
'label' => JText::_('COM_AKEEBA_REMOTEFILES_FETCH'),
'link' => "index.php?option=com_akeeba&view=RemoteFiles&task=dltoserver&tmpl=component&id={$stat['id']}&part=-1",
'type' => 'button',
'icon' => 'icon-download icon-white',
'class' => 'btn-large btn-primary',
);
$actions[] = $action;
}
// Does the engine support remote deletes?
if ($postProcEngine->can_delete)
{
// Add a Delete button
$action = array(
'label' => JText::_('COM_AKEEBA_REMOTEFILES_DELETE'),
'link' => "index.php?option=com_akeeba&view=RemoteFiles&task=delete&tmpl=component&id={$stat['id']}&part=-1",
'type' => 'button',
'icon' => 'icon-trash icon-white',
'class' => 'btn-danger',
);
$actions[] = $action;
}
// Does the engine support downloads to browser?
if ($postProcEngine->can_download_to_browser)
{
$parts = $stat['multipart'];
if ($parts == 0)
{
$parts++;
}
for ($i = 0; $i < $parts; $i++)
{
$action = array(
'label' => JText::sprintf('COM_AKEEBA_REMOTEFILES_PART', $i),
'link' => "index.php?option=com_akeeba&view=RemoteFiles&task=dlfromremote&id={$stat['id']}&part=$i",
'type' => 'link',
'class' => '',
'icon' => 'icon-download',
);
$actions[] = $action;
}
}
return $actions;
}
/**
* Downloads a remote file back to the site's server
*
* @return array
*/
function downloadToServer()
{
$id = $this->getState('id', -1);
$part = $this->getState('part', -1);
$frag = $this->getState('frag', -1);
$ret = array(
'error' => false,
'finished' => false,
'id' => $id,
'part' => $part,
'frag' => $frag,
);
// Gather the necessary information to perform the download
$stat = Platform::getInstance()->get_statistics($id);
$remoteFilenameParts = explode('://', $stat['remote_filename']);
$engine = Factory::getPostprocEngine($remoteFilenameParts[0]);
$remote_filename = $remoteFilenameParts[1];
// Get a reference to the session object
$session = $this->container->session;
$config = Factory::getConfiguration();
// Start timing ourselves
$timer = Factory::getTimer(); // The core timer object
$start = $timer->getRunningTime(); // Mark the start of this download
$break = false; // Don't break the step
while ($timer->getTimeLeft() && !$break && ($part < $stat['multipart']))
{
// Get the remote and local filenames
$basename = basename($remote_filename);
$extension = strtolower(str_replace(".", "", strrchr($basename, ".")));
$new_extension = $extension;
if ($part > 0)
{
$new_extension = substr($extension, 0, 1) . sprintf('%02u', $part);
}
$remote_filename = substr($remote_filename, 0, -strlen($extension)) . $new_extension;
// Figure out where on Earth to put that file
$local_file = $config->get('akeeba.basic.output_directory') . '/' . basename($remote_filename);
// Do we have to initialize the process?
if ($part == -1)
{
// Total size to download
$session->set('dl_totalsize', $stat['total_size'], 'akeeba');
// Currently downloaded size
$session->set('dl_donesize', 0, 'akeeba');
// Init
$part = 0;
}
// Do we have to initialize the file?
if ($frag == -1)
{
// Delete and touch the output file
Platform::getInstance()->unlink($local_file);
$fp = @fopen($local_file, 'wb');
if ($fp !== false)
{
@fclose($fp);
}
// Init
$frag = 0;
}
// Calculate from and length
$length = 1048576;
$from = $frag * $length + 1;
// Try to download the first frag
$temp_file = $local_file . '.tmp';
$staggered = true;
$required_time = 1.0;
$result = $engine->downloadToFile($remote_filename, $temp_file, $from, $length);
if ($result == -1)
{
// The engine doesn't support staggered downloads
$staggered = false;
$result = $engine->downloadToFile($remote_filename, $temp_file);
}
if (!$result)
{
// Failed download
if (
(
(($part < $stat['multipart']) || (($stat['multipart'] == 0) && ($part == 0))) &&
($frag == 0)
)
||
!$staggered
)
{
// Failure to download the part's beginning = failure to download. Period.
$ret['error'] = JText::_('COM_AKEEBA_REMOTEFILES_ERR_CANTDOWNLOAD') . $engine->getWarning();
return $ret;
}
elseif ($part >= $stat['multipart'])
{
// Just finished! Update the stats record.
$stat['filesexist'] = 1;
Platform::getInstance()->set_or_update_statistics($id, $stat, $engine);
$ret['finished'] = true;
return $ret;
}
else
{
// Since this is a staggered download, consider this normal and go to the next part.
$part++;
$frag = -1;
}
}
// Add the currently downloaded frag to the total size of downloaded files
if ($result)
{
$filesize = (int)@filesize($temp_file);
$total = $session->get('dl_donesize', 0, 'akeeba');
$total += $filesize;
$session->set('dl_donesize', $total, 'akeeba');
}
// Successful download, or have to move to the next part.
if ($staggered)
{
if ($result)
{
// Append the file
$fp = @fopen($local_file, 'ab');
if ($fp === false)
{
// Can't open the file for writing
Platform::getInstance()->unlink($temp_file);
$ret['error'] = JText::sprintf('COM_AKEEBA_REMOTEFILES_ERR_CANTOPENFILE', $local_file);
return $ret;
}
$tf = fopen($temp_file, 'rb');
while (!feof($tf))
{
$data = fread($tf, 262144);
fwrite($fp, $data);
}
fclose($tf);
fclose($fp);
Platform::getInstance()->unlink($tf);
}
// Advance the frag pointer and mark the end
$end = $timer->getRunningTime();
$frag++;
}
else
{
if ($result)
{
// Rename the temporary file
if (@file_exists($local_file))
{
$result = Platform::getInstance()->unlink($local_file);
}
if ($result)
{
$result = Platform::getInstance()->move($temp_file, $local_file);
}
else
{
$result = Platform::getInstance()->unlink($temp_file);
}
if (!$result)
{
// Renaming failed. Goodbye.
Platform::getInstance()->unlink($temp_file);
$ret['error'] = JText::sprintf('COM_AKEEBA_REMOTEFILES_ERR_CANTOPENFILE', $local_file);
return $ret;
}
}
// In whole part downloads we break the step without second thought
$break = true;
$end = $timer->getRunningTime();
$frag = -1;
$part++;
}
// Do we predict that we have enough time?
$required_time = max(1.1 * ($end - $start), $required_time);
if ($timer->getTimeLeft() < $required_time)
{
$break = true;
}
$start = $end;
}
// Pass the id, part, frag in the request so that the view can grab it
$ret['id'] = $id;
$ret['part'] = $part;
$ret['frag'] = $frag;
$this->setState('id', $id);
$this->setState('part', $part);
$this->setState('frag', $frag);
if ($part >= $stat['multipart'])
{
// Just finished!
$stat['filesexist'] = 1;
Platform::getInstance()->set_or_update_statistics($id, $stat, $engine);
$ret['finished'] = true;
}
return $ret;
}
/**
* Delete the files stored in the remote storage service
*
* @return array
*/
public function deleteRemoteFiles()
{
$id = $this->getState('id', -1);
$part = $this->getState('part', -1);
$ret = array(
'error' => false,
'finished' => false,
'id' => $id,
'part' => $part
);
// Gather the necessary information to perform the delete
$stat = Platform::getInstance()->get_statistics($id);
$remoteFilenameParts = explode('://', $stat['remote_filename']);
$engine = Factory::getPostprocEngine($remoteFilenameParts[0]);
$remote_filename = $remoteFilenameParts[1];
// Start timing ourselves
$timer = Factory::getTimer(); // The core timer object
$start = $timer->getRunningTime(); // Mark the start of this download
$break = false; // Don't break the step
while ($timer->getTimeLeft() && !$break && ($part < $stat['multipart']))
{
// Get the remote filename
$basename = basename($remote_filename);
$extension = strtolower(str_replace(".", "", strrchr($basename, ".")));
$new_extension = $extension;
if ($part > 0)
{
$new_extension = substr($extension, 0, 1) . sprintf('%02u', $part);
}
$remote_filename = substr($remote_filename, 0, -strlen($extension)) . $new_extension;
// Do we have to initialize the process?
if ($part == -1)
{
// Init
$part = 0;
}
// Try to delete the part
$required_time = 1.0;
$result = $engine->delete($remote_filename);
if ( !$result)
{
$ret['error'] = JText::_('COM_AKEEBA_REMOTEFILES_ERR_CANTDELETE') . $engine->getWarning();
return $ret;
}
// Successful delete
$end = $timer->getRunningTime();
$part++;
// Do we predict that we have enough time?
$required_time = max(1.1 * ($end - $start), $required_time);
if ($timer->getTimeLeft() < $required_time)
{
$break = true;
}
$start = $end;
}
if ($part >= $stat['multipart'])
{
// Just finished!
$stat['remote_filename'] = '';
Platform::getInstance()->set_or_update_statistics($id, $stat, $engine);
$ret['finished'] = true;
return $ret;
}
// More work to do...
$ret['id'] = $id;
$ret['part'] = $part;
return $ret;
}
}