1<?php
2
3/*
4 * This file is part of the Symfony package.
5 *
6 * (c) Fabien Potencier <fabien@symfony.com>
7 *
8 * For the full copyright and license information, please view the LICENSE
9 * file that was distributed with this source code.
10 */
11
12namespace Symfony\Component\Mailer\Transport;
13
14use Psr\Log\LoggerInterface;
15use Symfony\Component\Mailer\Envelope;
16use Symfony\Component\Mailer\SentMessage;
17use Symfony\Component\Mailer\Transport\Smtp\SmtpTransport;
18use Symfony\Component\Mailer\Transport\Smtp\Stream\AbstractStream;
19use Symfony\Component\Mailer\Transport\Smtp\Stream\ProcessStream;
20use Symfony\Component\Mime\RawMessage;
21use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
22
23/**
24 * SendmailTransport for sending mail through a Sendmail/Postfix (etc..) binary.
25 *
26 * Supported modes are -bs and -t, with any additional flags desired.
27 * It is advised to use -bs mode since error reporting with -t mode is not
28 * possible.
29 *
30 * Transport can be instanciated through SendmailTransportFactory or NativeTransportFactory:
31 *
32 * - SendmailTransportFactory to use most common sendmail path and recommanded options
33 * - NativeTransportFactory when configuration is set via php.ini
34 *
35 * @author Fabien Potencier <fabien@symfony.com>
36 * @author Chris Corbyn
37 */
38class SendmailTransport extends AbstractTransport
39{
40    private $command = '/usr/sbin/sendmail -bs';
41    private $stream;
42    private $transport;
43
44    /**
45     * Constructor.
46     *
47     * If using -t mode you are strongly advised to include -oi or -i in the flags.
48     * For example: /usr/sbin/sendmail -oi -t
49     * -f<sender> flag will be appended automatically if one is not present.
50     *
51     * The recommended mode is "-bs" since it is interactive and failure notifications are hence possible.
52     */
53    public function __construct(string $command = null, EventDispatcherInterface $dispatcher = null, LoggerInterface $logger = null)
54    {
55        parent::__construct($dispatcher, $logger);
56
57        if (null !== $command) {
58            if (false === strpos($command, ' -bs') && false === strpos($command, ' -t')) {
59                throw new \InvalidArgumentException(sprintf('Unsupported sendmail command flags "%s"; must be one of "-bs" or "-t" but can include additional flags.', $command));
60            }
61
62            $this->command = $command;
63        }
64
65        $this->stream = new ProcessStream();
66        if (false !== strpos($this->command, ' -bs')) {
67            $this->stream->setCommand($this->command);
68            $this->transport = new SmtpTransport($this->stream, $dispatcher, $logger);
69        }
70    }
71
72    public function send(RawMessage $message, Envelope $envelope = null): ?SentMessage
73    {
74        if ($this->transport) {
75            return $this->transport->send($message, $envelope);
76        }
77
78        return parent::send($message, $envelope);
79    }
80
81    public function __toString(): string
82    {
83        if ($this->transport) {
84            return (string) $this->transport;
85        }
86
87        return 'smtp://sendmail';
88    }
89
90    protected function doSend(SentMessage $message): void
91    {
92        $this->getLogger()->debug(sprintf('Email transport "%s" starting', __CLASS__));
93
94        $command = $this->command;
95        if (false === strpos($command, ' -f')) {
96            $command .= ' -f'.escapeshellarg($message->getEnvelope()->getSender()->getEncodedAddress());
97        }
98
99        $chunks = AbstractStream::replace("\r\n", "\n", $message->toIterable());
100
101        if (false === strpos($command, ' -i') && false === strpos($command, ' -oi')) {
102            $chunks = AbstractStream::replace("\n.", "\n..", $chunks);
103        }
104
105        $this->stream->setCommand($command);
106        $this->stream->initialize();
107        foreach ($chunks as $chunk) {
108            $this->stream->write($chunk);
109        }
110        $this->stream->flush();
111        $this->stream->terminate();
112
113        $this->getLogger()->debug(sprintf('Email transport "%s" stopped', __CLASS__));
114    }
115}
116