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<?php
/*
* This file is part of SwiftMailer.
* (c) 2009 Fabien Potencier <fabien.potencier@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* Stores Messages on the filesystem.
*
* @author Fabien Potencier
* @author Xavier De Cock <xdecock@gmail.com>
*/
class Swift_FileSpool extends Swift_ConfigurableSpool
{
/** The spool directory */
private $path;
/**
* File WriteRetry Limit.
*
* @var int
*/
private $retryLimit = 10;
/**
* Create a new FileSpool.
*
* @param string $path
*
* @throws Swift_IoException
*/
public function __construct($path)
{
$this->path = $path;
if (!file_exists($this->path)) {
if (!mkdir($this->path, 0777, true)) {
throw new Swift_IoException(sprintf('Unable to create path "%s".', $this->path));
}
}
}
/**
* Tests if this Spool mechanism has started.
*
* @return bool
*/
public function isStarted()
{
return true;
}
/**
* Starts this Spool mechanism.
*/
public function start()
{
}
/**
* Stops this Spool mechanism.
*/
public function stop()
{
}
/**
* Allow to manage the enqueuing retry limit.
*
* Default, is ten and allows over 64^20 different fileNames
*
* @param int $limit
*/
public function setRetryLimit($limit)
{
$this->retryLimit = $limit;
}
/**
* Queues a message.
*
* @param Swift_Mime_SimpleMessage $message The message to store
*
* @throws Swift_IoException
*
* @return bool
*/
public function queueMessage(Swift_Mime_SimpleMessage $message)
{
$ser = serialize($message);
$fileName = $this->path.'/'.$this->getRandomString(10);
for ($i = 0; $i < $this->retryLimit; ++$i) {
/* We try an exclusive creation of the file. This is an atomic operation, it avoid locking mechanism */
$fp = @fopen($fileName.'.message', 'xb');
if (false !== $fp) {
if (false === fwrite($fp, $ser)) {
return false;
}
return fclose($fp);
} else {
/* The file already exists, we try a longer fileName */
$fileName .= $this->getRandomString(1);
}
}
throw new Swift_IoException(sprintf('Unable to create a file for enqueuing Message in "%s".', $this->path));
}
/**
* Execute a recovery if for any reason a process is sending for too long.
*
* @param int $timeout in second Defaults is for very slow smtp responses
*/
public function recover($timeout = 900)
{
foreach (new DirectoryIterator($this->path) as $file) {
$file = $file->getRealPath();
if ('.message.sending' == substr($file, -16)) {
$lockedtime = filectime($file);
if ((time() - $lockedtime) > $timeout) {
rename($file, substr($file, 0, -8));
}
}
}
}
/**
* Sends messages using the given transport instance.
*
* @param Swift_Transport $transport A transport instance
* @param string[] $failedRecipients An array of failures by-reference
*
* @return int The number of sent e-mail's
*/
public function flushQueue(Swift_Transport $transport, &$failedRecipients = null)
{
$directoryIterator = new DirectoryIterator($this->path);
/* Start the transport only if there are queued files to send */
if (!$transport->isStarted()) {
foreach ($directoryIterator as $file) {
if ('.message' == substr($file->getRealPath(), -8)) {
$transport->start();
break;
}
}
}
$failedRecipients = (array) $failedRecipients;
$count = 0;
$time = time();
foreach ($directoryIterator as $file) {
$file = $file->getRealPath();
if ('.message' != substr($file, -8)) {
continue;
}
/* We try a rename, it's an atomic operation, and avoid locking the file */
if (rename($file, $file.'.sending')) {
$message = unserialize(file_get_contents($file.'.sending'));
$count += $transport->send($message, $failedRecipients);
unlink($file.'.sending');
} else {
/* This message has just been catched by another process */
continue;
}
if ($this->getMessageLimit() && $count >= $this->getMessageLimit()) {
break;
}
if ($this->getTimeLimit() && (time() - $time) >= $this->getTimeLimit()) {
break;
}
}
return $count;
}
/**
* Returns a random string needed to generate a fileName for the queue.
*
* @param int $count
*
* @return string
*/
protected function getRandomString($count)
{
// This string MUST stay FS safe, avoid special chars
$base = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_-';
$ret = '';
$strlen = \strlen($base);
for ($i = 0; $i < $count; ++$i) {
$ret .= $base[random_int(0, $strlen - 1)];
}
return $ret;
}
}
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