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<?php
/*
Copyright (c) 2009-2014 F3::Factory/Bong Cosca, All rights reserved.
This file is part of the Fat-Free Framework (http://fatfree.sf.net).
THE SOFTWARE AND DOCUMENTATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF
ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
PURPOSE.
Please see the license.txt file for more information.
*/
//! SMTP plug-in
class SMTP extends Magic {
//@{ Locale-specific error/exception messages
const
E_Header='%s: header is required',
E_Blank='Message must not be blank',
E_Attach='Attachment %s not found';
//@}
protected
//! Message properties
$headers,
//! E-mail attachments
$attachments,
//! SMTP host
$host,
//! SMTP port
$port,
//! TLS/SSL
$scheme,
//! User ID
$user,
//! Password
$pw,
//! TCP/IP socket
$socket,
//! Server-client conversation
$log;
/**
* Fix header
* @return string
* @param $key string
**/
protected function fixheader($key) {
return str_replace(' ','-',
ucwords(preg_replace('/[_-]/',' ',strtolower($key))));
}
/**
* Return TRUE if header exists
* @return bool
* @param $key
**/
function exists($key) {
$key=$this->fixheader($key);
return isset($this->headers[$key]);
}
/**
* Bind value to e-mail header
* @return string
* @param $key string
* @param $val string
**/
function set($key,$val) {
$key=$this->fixheader($key);
return $this->headers[$key]=$val;
}
/**
* Return value of e-mail header
* @return string|NULL
* @param $key string
**/
function get($key) {
$key=$this->fixheader($key);
return isset($this->headers[$key])?$this->headers[$key]:NULL;
}
/**
* Remove header
* @return NULL
* @param $key string
**/
function clear($key) {
$key=$this->fixheader($key);
unset($this->headers[$key]);
}
/**
* Return client-server conversation history
* @return string
**/
function log() {
return str_replace("\n",PHP_EOL,$this->log);
}
/**
* Send SMTP command and record server response
* @return string
* @param $cmd string
* @param $log bool
**/
protected function dialog($cmd=NULL,$log=TRUE) {
$socket=&$this->socket;
if (!is_null($cmd))
fputs($socket,$cmd."\r\n");
$reply='';
while (!feof($socket) && ($info=stream_get_meta_data($socket)) &&
!$info['timed_out'] && $str=fgets($socket,4096)) {
$reply.=$str;
if (preg_match('/(?:^|\n)\d{3} .+?\r\n/s',$reply))
break;
}
if ($log) {
$this->log.=$cmd."\n";
$this->log.=str_replace("\r",'',$reply);
}
return $reply;
}
/**
* Add e-mail attachment
* @return NULL
* @param $file
**/
function attach($file) {
if (!is_file($file))
user_error(sprintf(self::E_Attach,$file));
$this->attachments[]=$file;
}
/**
* Transmit message
* @return bool
* @param $message string
* @param $log bool
**/
function send($message,$log=TRUE) {
if ($this->scheme=='ssl' && !extension_loaded('openssl'))
return FALSE;
// Message should not be blank
if (!$message)
user_error(self::E_Blank);
$fw=Base::instance();
// Retrieve headers
$headers=$this->headers;
// Connect to the server
$socket=&$this->socket;
$socket=@fsockopen($this->host,$this->port);
if (!$socket)
return FALSE;
stream_set_blocking($socket,TRUE);
// Get server's initial response
$this->dialog(NULL,FALSE);
// Announce presence
$reply=$this->dialog('EHLO '.$fw->get('HOST'),$log);
if (strtolower($this->scheme)=='tls') {
$this->dialog('STARTTLS',$log);
stream_socket_enable_crypto(
$socket,TRUE,STREAM_CRYPTO_METHOD_TLS_CLIENT);
$reply=$this->dialog('EHLO '.$fw->get('HOST'),$log);
if (preg_match('/8BITMIME/',$reply))
$headers['Content-Transfer-Encoding']='8bit';
else {
$headers['Content-Transfer-Encoding']='quoted-printable';
$message=quoted_printable_encode($message);
}
}
if ($this->user && $this->pw && preg_match('/AUTH/',$reply)) {
// Authenticate
$this->dialog('AUTH LOGIN',$log);
$this->dialog(base64_encode($this->user),$log);
$this->dialog(base64_encode($this->pw),$log);
}
// Required headers
$reqd=array('From','To','Subject');
foreach ($reqd as $id)
if (empty($headers[$id]))
user_error(sprintf(self::E_Header,$id));
$eol="\r\n";
$str='';
// Stringify headers
foreach ($headers as $key=>$val)
if (!in_array($key,$reqd))
$str.=$key.': '.$val.$eol;
// Start message dialog
$this->dialog('MAIL FROM: '.strstr($headers['From'],'<'),$log);
foreach ($fw->split($headers['To'].
(isset($headers['Cc'])?(';'.$headers['Cc']):'').
(isset($headers['Bcc'])?(';'.$headers['Bcc']):'')) as $dst)
$this->dialog('RCPT TO: '.strstr($dst,'<'),$log);
$this->dialog('DATA',$log);
if ($this->attachments) {
// Replace Content-Type
$hash=uniqid(NULL,TRUE);
$type=$headers['Content-Type'];
$headers['Content-Type']='multipart/mixed; '.
'boundary="'.$hash.'"';
// Send mail headers
$out='';
foreach ($headers as $key=>$val)
if ($key!='Bcc')
$out.=$key.': '.$val.$eol;
$out.=$eol;
$out.='This is a multi-part message in MIME format'.$eol;
$out.=$eol;
$out.='--'.$hash.$eol;
$out.='Content-Type: '.$type.$eol;
$out.=$eol;
$out.=$message.$eol;
foreach ($this->attachments as $attachment) {
$out.='--'.$hash.$eol;
$out.='Content-Type: application/octet-stream'.$eol;
$out.='Content-Transfer-Encoding: base64'.$eol;
$out.='Content-Disposition: attachment; '.
'filename="'.basename($attachment).'"'.$eol;
$out.=$eol;
$out.=chunk_split(
base64_encode(file_get_contents($attachment))).$eol;
}
$out.=$eol;
$out.='--'.$hash.'--'.$eol;
$out.='.';
$this->dialog($out,FALSE);
}
else {
// Send mail headers
$out='';
foreach ($headers as $key=>$val)
if ($key!='Bcc')
$out.=$key.': '.$val.$eol;
$out.=$eol;
$out.=$message.$eol;
$out.='.';
// Send message
$this->dialog($out);
}
$this->dialog('QUIT',$log);
if ($socket)
fclose($socket);
return TRUE;
}
/**
* Instantiate class
* @param $host string
* @param $port int
* @param $scheme string
* @param $user string
* @param $pw string
**/
function __construct($host,$port,$scheme,$user,$pw) {
$this->headers=array(
'MIME-Version'=>'1.0',
'Content-Type'=>'text/plain; '.
'charset='.Base::instance()->get('ENCODING')
);
$this->host=$host;
if (strtolower($this->scheme=strtolower($scheme))=='ssl')
$this->host='ssl://'.$host;
$this->port=$port;
$this->user=$user;
$this->pw=$pw;
}
}
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