<?php
/**
* MyBB 1.6
* Copyright 2010 MyBB Group, All Rights Reserved
*
* Website: http://mybb.com
* License: http://mybb.com/about/license
*
* $Id: class_mailhandler.php 5016 2010-06-12 00:24:02Z RyanGordon $
*/
/**
* Base mail handler class.
*/
class MailHandler
{
/**
* Which email it should send to.
*
* @var string
*/
public $to;
/**
* 1/0 value weather it should show errors or not.
*
* @var integer
*/
public $show_errors = 1;
/**
* Who it is from.
*
* @var string
*/
public $from;
/**
* Who the email should return to.
*
* @var string
*/
public $return_email;
/**
* The subject of mail.
*
* @var string
*/
public $subject;
/**
* The unaltered subject of mail.
*
* @var string
*/
public $orig_subject;
/**
* The message of the mail.
*
* @var string
*/
public $message;
/**
* The headers of the mail.
*
* @var string
*/
public $headers;
/**
* The charset of the mail.
*
* @var string
* @default utf-8
*/
public $charset = "utf-8";
/**
* The currently used delimiter new lines.
*
* @var string.
*/
public $delimiter = "\r\n";
/**
* How it should parse the email (HTML or plain text?)
*
* @var array
*/
public $parse_format = 'text';
/**
* Builds the whole mail.
* To be used by the different email classes later.
*
* @param string to email.
* @param string subject of email.
* @param string message of email.
* @param string from email.
* @param string charset of email.
* @param string headers of email.
* @param string format of the email (HTML, plain text, or both?).
* @param string plain text version of the email.
* @param string the return email address.
*/
function build_message($to, $subject, $message, $from="", $charset="", $headers="", $format="text", $message_text="", $return_email="")
{
global $parser, $lang, $mybb;
$this->message = '';
$this->headers = $headers;
if($from)
{
$this->from = $from;
}
else
{
$this->from = "";
}
if($return_email)
{
$this->return_email = $return_email;
}
else
{
$this->return_email = "";
}
$this->set_to($to);
$this->set_subject($subject);
if($charset)
{
$this->set_charset($charset);
}
$this->parse_format = $format;
$this->set_common_headers();
$this->set_message($message, $message_text);
}
/**
* Sets the charset.
*
* @param string charset
*/
function set_charset($charset)
{
global $lang;
if(empty($charset))
{
$this->charset = $lang->settings['charset'];
}
else
{
$this->charset = $charset;
}
}
/**
* Sets and formats the email message.
*
* @param string message
*/
function set_message($message, $message_text="")
{
if($this->parse_format == "html" || $this->parse_format == "both")
{
$this->set_html_headers($message, $message_text);
}
else
{
$this->message = $message;
$this->set_plain_headers();
}
}
/**
* Sets and formats the email subject.
*
* @param string subject
*/
function set_subject($subject)
{
$this->orig_subject = $this->cleanup($subject);
$this->subject = $this->utf8_encode($this->orig_subject);
}
/**
* Sets and formats the recipient address.
*
* @param string to
*/
function set_to($to)
{
$to = $this->cleanup($to);
$this->to = $this->cleanup($to);
}
/**
* Sets the plain headers, text/plain
*/
function set_plain_headers()
{
$this->headers .= "Content-Type: text/plain; charset={$this->charset}{$this->delimiter}";
}
/**
* Sets the alternative headers, text/html and text/plain.
*
* @param string message
*/
function set_html_headers($message, $message_text="")
{
if(!$message_text && $this->parse_format == 'both')
{
$message_text = strip_tags($message);
}
if($this->parse_format == 'both')
{
$mime_boundary = "=_NextPart".md5(TIME_NOW);
$this->headers .= "Content-Type: multipart/alternative; boundary=\"{$mime_boundary}\"{$this->delimiter}";
$this->message = "This is a multi-part message in MIME format.{$this->delimiter}{$this->delimiter}";
$this->message .= "--{$mime_boundary}{$this->delimiter}";
$this->message .= "Content-Type: text/plain; charset=\"{$this->charset}\"{$this->delimiter}";
$this->message .= "Content-Transfer-Encoding: 8bit{$this->delimiter}{$this->delimiter}";
$this->message .= $message_text."{$this->delimiter}{$this->delimiter}";
$this->message .= "--{$mime_boundary}{$this->delimiter}";
$this->message .= "Content-Type: text/html; charset=\"{$this->charset}\"{$this->delimiter}";
$this->message .= "Content-Transfer-Encoding: 8bit{$this->delimiter}{$this->delimiter}";
$this->message .= $message."{$this->delimiter}{$this->delimiter}";
$this->message .= "--{$mime_boundary}--{$this->delimiter}{$this->delimiter}";
}
else
{
$this->headers .= "Content-Type: text/html; charset=\"{$this->charset}\"{$this->delimiter}";
$this->headers .= "Content-Transfer-Encoding: 8bit{$this->delimiter}{$this->delimiter}";
$this->message = $message."{$this->delimiter}{$this->delimiter}";
}
}
/**
* Sets the common headers.
*/
function set_common_headers()
{
global $mybb;
// Build mail headers
if(!trim($this->from))
{
if($mybb->settings['mail_handler'] == 'smtp')
{
$this->from = $mybb->settings['adminemail'];
}
else
{
$this->from = '"'.$this->utf8_encode($mybb->settings['bbname']).'"';
$this->from .= " <{$mybb->settings['adminemail']}>";
}
}
$this->headers .= "From: {$this->from}{$this->delimiter}";
if($this->return_email)
{
$this->headers .= "Return-Path: {$this->return_email}{$this->delimiter}";
$this->headers .= "Reply-To: {$this->return_email}{$this->delimiter}";
}
elseif($mybb->settings['returnemail'])
{
$this->headers .= "Return-Path: {$mybb->settings['returnemail']}{$this->delimiter}";
$this->headers .= "Reply-To: {$mybb->settings['adminemail']}{$this->delimiter}";
}
else
{
$this->headers .= "Return-Path: {$mybb->settings['adminemail']}{$this->delimiter}";
$this->headers .= "Reply-To: {$mybb->settings['adminemail']}{$this->delimiter}";
}
if(isset($_SERVER['SERVER_NAME']))
{
$http_host = $_SERVER['SERVER_NAME'];
}
else if(isset($_SERVER['HTTP_HOST']))
{
$http_host = $_SERVER['HTTP_HOST'];
}
else
{
$http_host = "unknown.local";
}
$msg_id = md5(uniqid(TIME_NOW)) . "@" . $http_host;
if($mybb->settings['mail_message_id'])
{
$this->headers .= "Message-ID: <{$msg_id}>{$this->delimiter}";
}
$this->headers .= "Content-Transfer-Encoding: 8bit{$this->delimiter}";
$this->headers .= "X-Priority: 3{$this->delimiter}";
$this->headers .= "X-MSMail-Priority: Normal{$this->delimiter}";
$this->headers .= "X-Mailer: MyBB{$this->delimiter}";
$this->headers .= "MIME-Version: 1.0{$this->delimiter}";
}
/**
* Log a fatal error message to the database.
*
* @param string The error message
* @param string Any additional information
*/
function fatal_error($error)
{
global $db;
$mail_error = array(
"subject" => $db->escape_string($this->orig_subject),
"message" => $db->escape_string($this->message),
"toaddress" => $db->escape_string($this->to),
"fromaddress" => $db->escape_string($this->from),
"dateline" => TIME_NOW,
"error" => $db->escape_string($error),
"smtperror" => $db->escape_string($this->data),
"smtpcode" => intval($this->code)
);
$db->insert_query("mailerrors", $mail_error);
// Another neat feature would be the ability to notify the site administrator via email - but wait, with email down, how do we do that? How about private message and hope the admin checks their PMs?
}
/**
* Rids pesky characters from subjects, recipients, from addresses etc (prevents mail injection too)
*
* @param string The string being checked
* @return string The cleaned string
*/
function cleanup($string)
{
$string = str_replace(array("\r", "\n", "\r\n"), "", $string);
$string = trim($string);
return $string;
}
/**
* Encode a string based on the character set enabled. Used to encode subjects
* and recipients in email messages going out so that they show up correctly
* in email clients.
*
* @param string The string to be encoded.
* @return string The encoded string.
*/
function utf8_encode($string)
{
if(strtolower($this->charset) == 'utf-8' && preg_match('/[^\x20-\x7E]/', $string))
{
$chunk_size = 47; // Derived from floor((75 - strlen("=?UTF-8?B??=")) * 0.75);
$len = strlen($string);
$output = '';
$pos = 0;
while($pos < $len)
{
$newpos = min($pos + $chunk_size, $len);
while(ord($string[$newpos]) >= 0x80 && ord($string[$newpos]) < 0xC0)
{
// Reduce len until it's safe to split UTF-8.
$newpos--;
}
$chunk = substr($string, $pos, $newpos - $pos);
$pos = $newpos;
$output .= " =?UTF-8?B?".base64_encode($chunk)."?=\n";
}
return trim($output);
}
return $string;
}
}
?>
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