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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Mailer\Transport;
use Psr\EventDispatcher\EventDispatcherInterface;
use Psr\Log\LoggerInterface;
use Symfony\Component\Mailer\Envelope;
use Symfony\Component\Mailer\SentMessage;
use Symfony\Component\Mailer\Transport\Smtp\SmtpTransport;
use Symfony\Component\Mailer\Transport\Smtp\Stream\AbstractStream;
use Symfony\Component\Mailer\Transport\Smtp\Stream\ProcessStream;
use Symfony\Component\Mime\RawMessage;
/**
* SendmailTransport for sending mail through a Sendmail/Postfix (etc..) binary.
*
* Transport can be instantiated through SendmailTransportFactory or NativeTransportFactory:
*
* - SendmailTransportFactory to use most common sendmail path and recommended options
* - NativeTransportFactory when configuration is set via php.ini
*
* @author Fabien Potencier <fabien@symfony.com>
* @author Chris Corbyn
*/
class SendmailTransport extends AbstractTransport
{
private string $command = '/usr/sbin/sendmail -bs';
private ProcessStream $stream;
private ?SmtpTransport $transport = null;
/**
* Constructor.
*
* Supported modes are -bs and -t, with any additional flags desired.
*
* The recommended mode is "-bs" since it is interactive and failure notifications are hence possible.
* Note that the -t mode does not support error reporting and does not support Bcc properly (the Bcc headers are not removed).
*
* If using -t mode, you are strongly advised to include -oi or -i in the flags (like /usr/sbin/sendmail -oi -t)
*
* -f<sender> flag will be appended automatically if one is not present.
*/
public function __construct(string $command = null, EventDispatcherInterface $dispatcher = null, LoggerInterface $logger = null)
{
parent::__construct($dispatcher, $logger);
if (null !== $command) {
if (!str_contains($command, ' -bs') && !str_contains($command, ' -t')) {
throw new \InvalidArgumentException(sprintf('Unsupported sendmail command flags "%s"; must be one of "-bs" or "-t" but can include additional flags.', $command));
}
$this->command = $command;
}
$this->stream = new ProcessStream();
if (str_contains($this->command, ' -bs')) {
$this->stream->setCommand($this->command);
$this->transport = new SmtpTransport($this->stream, $dispatcher, $logger);
}
}
public function send(RawMessage $message, Envelope $envelope = null): ?SentMessage
{
if ($this->transport) {
return $this->transport->send($message, $envelope);
}
return parent::send($message, $envelope);
}
public function __toString(): string
{
if ($this->transport) {
return (string) $this->transport;
}
return 'smtp://sendmail';
}
protected function doSend(SentMessage $message): void
{
$this->getLogger()->debug(sprintf('Email transport "%s" starting', __CLASS__));
$command = $this->command;
if ($recipients = $message->getEnvelope()->getRecipients()) {
$command = str_replace(' -t', '', $command);
}
if (!str_contains($command, ' -f')) {
$command .= ' -f'.escapeshellarg($message->getEnvelope()->getSender()->getEncodedAddress());
}
$chunks = AbstractStream::replace("\r\n", "\n", $message->toIterable());
if (!str_contains($command, ' -i') && !str_contains($command, ' -oi')) {
$chunks = AbstractStream::replace("\n.", "\n..", $chunks);
}
foreach ($recipients as $recipient) {
$command .= ' '.escapeshellarg($recipient->getEncodedAddress());
}
$this->stream->setCommand($command);
$this->stream->initialize();
foreach ($chunks as $chunk) {
$this->stream->write($chunk);
}
$this->stream->flush();
$this->stream->terminate();
$this->getLogger()->debug(sprintf('Email transport "%s" stopped', __CLASS__));
}
}
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