1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (https://nette.org)
  5:  * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
  6:  */
  7: 
  8: namespace Nette\Mail;
  9: 
 10: use Nette;
 11: 
 12: 
 13: /**
 14:  * Sends emails via the SMTP server.
 15:  *
 16:  * @author     David Grudl
 17:  */
 18: class SmtpMailer extends Nette\Object implements IMailer
 19: {
 20:     /** @var resource */
 21:     private $connection;
 22: 
 23:     /** @var string */
 24:     private $host;
 25: 
 26:     /** @var int */
 27:     private $port;
 28: 
 29:     /** @var string */
 30:     private $username;
 31: 
 32:     /** @var string */
 33:     private $password;
 34: 
 35:     /** @var string ssl | tls | (empty) */
 36:     private $secure;
 37: 
 38:     /** @var int */
 39:     private $timeout;
 40: 
 41:     /** @var bool */
 42:     private $persistent;
 43: 
 44: 
 45:     public function __construct(array $options = array())
 46:     {
 47:         if (isset($options['host'])) {
 48:             $this->host = $options['host'];
 49:             $this->port = isset($options['port']) ? (int) $options['port'] : NULL;
 50:         } else {
 51:             $this->host = ini_get('SMTP');
 52:             $this->port = (int) ini_get('smtp_port');
 53:         }
 54:         $this->username = isset($options['username']) ? $options['username'] : '';
 55:         $this->password = isset($options['password']) ? $options['password'] : '';
 56:         $this->secure = isset($options['secure']) ? $options['secure'] : '';
 57:         $this->timeout = isset($options['timeout']) ? (int) $options['timeout'] : 20;
 58:         if (!$this->port) {
 59:             $this->port = $this->secure === 'ssl' ? 465 : 25;
 60:         }
 61:         $this->persistent = !empty($options['persistent']);
 62:     }
 63: 
 64: 
 65:     /**
 66:      * Sends email.
 67:      * @return void
 68:      */
 69:     public function send(Message $mail)
 70:     {
 71:         $mail = clone $mail;
 72: 
 73:         try {
 74:             if (!$this->connection) {
 75:                 $this->connect();
 76:             }
 77: 
 78:             if (($from = $mail->getHeader('Return-Path'))
 79:                 || ($from = key($mail->getHeader('From')))
 80:             ) {
 81:                 $this->write("MAIL FROM:<$from>", 250);
 82:             }
 83: 
 84:             foreach (array_merge(
 85:                 (array) $mail->getHeader('To'),
 86:                 (array) $mail->getHeader('Cc'),
 87:                 (array) $mail->getHeader('Bcc')
 88:             ) as $email => $name) {
 89:                 $this->write("RCPT TO:<$email>", array(250, 251));
 90:             }
 91: 
 92:             $mail->setHeader('Bcc', NULL);
 93:             $data = $mail->generateMessage();
 94:             $this->write('DATA', 354);
 95:             $data = preg_replace('#^\.#m', '..', $data);
 96:             $this->write($data);
 97:             $this->write('.', 250);
 98: 
 99:             if (!$this->persistent) {
100:                 $this->write('QUIT', 221);
101:                 $this->disconnect();
102:             }
103:         } catch (SmtpException $e) {
104:             if ($this->connection) {
105:                 $this->disconnect();
106:             }
107:             throw $e;
108:         }
109:     }
110: 
111: 
112:     /**
113:      * Connects and authenticates to SMTP server.
114:      * @return void
115:      */
116:     protected function connect()
117:     {
118:         $this->connection = @fsockopen( // intentionally @
119:             ($this->secure === 'ssl' ? 'ssl://' : '') . $this->host,
120:             $this->port, $errno, $error, $this->timeout
121:         );
122:         if (!$this->connection) {
123:             throw new SmtpException($error, $errno);
124:         }
125:         stream_set_timeout($this->connection, $this->timeout, 0);
126:         $this->read(); // greeting
127: 
128:         $self = isset($_SERVER['HTTP_HOST']) && preg_match('#^[\w.-]+\z#', $_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : 'localhost';
129:         $this->write("EHLO $self");
130:         if ((int) $this->read() !== 250) {
131:             $this->write("HELO $self", 250);
132:         }
133: 
134:         if ($this->secure === 'tls') {
135:             $this->write('STARTTLS', 220);
136:             if (!stream_socket_enable_crypto($this->connection, TRUE, STREAM_CRYPTO_METHOD_TLS_CLIENT)) {
137:                 throw new SmtpException('Unable to connect via TLS.');
138:             }
139:             $this->write("EHLO $self", 250);
140:         }
141: 
142:         if ($this->username != NULL && $this->password != NULL) {
143:             $this->write('AUTH LOGIN', 334);
144:             $this->write(base64_encode($this->username), 334, 'username');
145:             $this->write(base64_encode($this->password), 235, 'password');
146:         }
147:     }
148: 
149: 
150:     /**
151:      * Disconnects from SMTP server.
152:      * @return void
153:      */
154:     protected function disconnect()
155:     {
156:         fclose($this->connection);
157:         $this->connection = NULL;
158:     }
159: 
160: 
161:     /**
162:      * Writes data to server and checks response.
163:      * @param  string
164:      * @param  int   response code
165:      * @param  string  error message
166:      * @return void
167:      */
168:     protected function write($line, $expectedCode = NULL, $message = NULL)
169:     {
170:         fwrite($this->connection, $line . Message::EOL);
171:         if ($expectedCode && !in_array((int) $this->read(), (array) $expectedCode, TRUE)) {
172:             throw new SmtpException('SMTP server did not accept ' . ($message ? $message : $line));
173:         }
174:     }
175: 
176: 
177:     /**
178:      * Reads response from server.
179:      * @return string
180:      */
181:     protected function read()
182:     {
183:         $s = '';
184:         while (($line = fgets($this->connection, 1e3)) != NULL) { // intentionally ==
185:             $s .= $line;
186:             if (substr($line, 3, 1) === ' ') {
187:                 break;
188:             }
189:         }
190:         return $s;
191:     }
192: 
193: }
194: 
195: 
196: /**
197:  * SMTP mailer exception.
198:  *
199:  * @author     David Grudl
200:  */
201: class SmtpException extends \Exception
202: {
203: }
204: