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vendor/symfony/mailer/Transport/SendmailTransport.php

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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__));
+    }
+}