<?php
/**
 *
 * SMTP相关操作类
 *
 *
 * This is NOT a freeware, use is subject to license terms
 *
 * @copyright Copyright (C) 2005 - 2099 Cenwor Inc.
 * @license http://www.cenwor.com
 * @link http://www.jishigou.net
 * @author 狐狸<foxis@qq.com>
 * @version $Id: smtp.han.php 793 2012-04-24 01:55:19Z wuliyong $
 */

if(!defined('IN_JISHIGOU'))
{
	exit('invalid request');
}
class SmtpHandler
{
	
	var $smtp_port;
	var $time_out;
	var $host_name;
	var $log_file;
	var $relay_host;
	var $debug;
	var $auth;
	var $user;
	var $pass;
	
	var $sock;
	
	function SmtpHandler($relay_host = "", $smtp_port = 25, $auth = false, $user, $pass)
	{
		$this -> debug = FALSE;
		$this -> smtp_port = $smtp_port;
		$this -> relay_host = $relay_host;
		$this -> time_out = 30; 		$this -> auth = $auth; 		$this -> user = $user;
		$this -> pass = $pass;
		$this -> host_name = "localhost"; 		$this -> log_file = "";
		$this -> sock = FALSE;
	}
	
	function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = "")
	{
		$sys_config = ConfigHandler::get();

		$mail_from = $this -> get_address($this -> strip_comment($from));
		$body = ereg_replace("(^|(\r\n))(\.)", "\1.\3", $body);
		$header = "MIME-Version:1.0\r\n";
		if($mailtype == "HTML"){
			$header .= "Content-Type:text/html\r\n";
		}
		$header .= "To: " . $to . "\r\n";
		if ($cc != ""){
			$header .= "Cc: " . $cc . "\r\n";
		}
		$header .= "From: $from<" . $from . ">\r\n";
		$subject = "=?{$sys_config['charset']}?B?" . base64_encode($subject) . "?=";
		$header .= "Subject: " . $subject . "\r\n";
		$header .= $additional_headers;
		$header .= "Date: " . date("r") . "\r\n";
		$header .= "X-Mailer:By Redhat (PHP/" . phpversion() . ")\r\n";
		list($msec, $sec) = explode(" ", microtime());
		$header .= "Message-ID: <" . date("YmdHis", $sec) . "." . ($msec * 1000000) . "." . $mail_from . ">\r\n";
		$TO = explode(",", $this -> strip_comment($to));
		if ($cc != ""){
			$TO = array_merge($TO, explode(",", $this -> strip_comment($cc)));
		}
		if ($bcc != ""){
			$TO = array_merge($TO, explode(",", $this -> strip_comment($bcc)));
		}
		$sent = TRUE;
		foreach ($TO as $rcpt_to){
			$rcpt_to = $this -> get_address($rcpt_to);
			if (!$this -> smtp_sockopen($rcpt_to)){
				$this -> log_write("Error: Cannot send email to " . $rcpt_to . "\n");
				$sent = FALSE;
				continue;
			}
			if ($this -> smtp_send($this -> host_name, $mail_from, $rcpt_to, $header, $body)){
				$this -> log_write("E-mail has been sent to <" . $rcpt_to . ">\n");
			}else{
				$this -> log_write("Error: Cannot send email to <" . $rcpt_to . ">\n");
				$sent = FALSE;
			}
			fclose($this -> sock);
			$this -> log_write("Disconnected from remote host\n");
		}
		return $sent;
	}
	
	function smtp_send($helo, $from, $to, $header, $body = "")
	{
		if (!$this -> smtp_putcmd("HELO", $helo)){
			return $this -> smtp_error("sending HELO command");
		}
		# auth
		if($this -> auth){
			if (!$this -> smtp_putcmd("AUTH LOGIN", base64_encode($this -> user))){
				return $this -> smtp_error("sending HELO command");
			}
			if (!$this -> smtp_putcmd("", base64_encode($this -> pass))){
				return $this -> smtp_error("sending HELO command");
			}
		}
		if (!$this -> smtp_putcmd("MAIL", "FROM:<" . $from . ">")){
			return $this -> smtp_error("sending MAIL FROM command");
		}
		if (!$this -> smtp_putcmd("RCPT", "TO:<" . $to . ">")){
			return $this -> smtp_error("sending RCPT TO command");
		}
		if (!$this -> smtp_putcmd("DATA")){
			return $this -> smtp_error("sending DATA command");
		}
		if (!$this -> smtp_message($header, $body)){
			return $this -> smtp_error("sending message");
		}
		if (!$this -> smtp_eom()){
			return $this -> smtp_error("sending <CR><LF>.<CR><LF> [EOM]");
		}
		if (!$this -> smtp_putcmd("QUIT")){
			return $this -> smtp_error("sending QUIT command");
		}
		return TRUE;
	}
	function smtp_sockopen($address)
	{
		if ($this -> relay_host == ""){
			return $this -> smtp_sockopen_mx($address);
		}else{
			return $this -> smtp_sockopen_relay();
		}
	}
	function smtp_sockopen_relay()
	{
		$this -> log_write("Trying to " . $this -> relay_host . ":" . $this -> smtp_port . "\n");
		$this -> sock = jfsockopen($this -> relay_host, $this -> smtp_port, $errno, $errstr, $this -> time_out);
		if (!($this -> sock && $this -> smtp_ok())){
			$this -> log_write("Error: Cannot connenct to relay host " . $this -> relay_host . "\n");
			$this -> log_write("Error: " . $errstr . " (" . $errno . ")\n");
			return FALSE;
		}
		$this -> log_write("Connected to relay host " . $this -> relay_host . "\n");
		return TRUE;;
	}
	function smtp_sockopen_mx($address)
	{
		$domain = ereg_replace("^.+@([^@]+)$", "\1", $address);
		if (!@getmxrr($domain, $MXHOSTS)){
			$this -> log_write("Error: Cannot resolve MX \"" . $domain . "\"\n");
			return FALSE;
		}
		foreach ($MXHOSTS as $host){
			$this -> log_write("Trying to " . $host . ":" . $this -> smtp_port . "\n");
			$this -> sock = jfsockopen($host, $this -> smtp_port, $errno, $errstr, $this -> time_out);
			if (!($this -> sock && $this -> smtp_ok())){
				$this -> log_write("Warning: Cannot connect to mx host " . $host . "\n");
				$this -> log_write("Error: " . $errstr . " (" . $errno . ")\n");
				continue;
			}
			$this -> log_write("Connected to mx host " . $host . "\n");
			return TRUE;
		}
		$this -> log_write("Error: Cannot connect to any mx hosts (" . implode(", ", $MXHOSTS) . ")\n");
		return FALSE;
	}
	function smtp_message($header, $body)
	{
		fputs($this -> sock, $header . "\r\n" . $body);
		$this -> smtp_debug("> " . str_replace("\r\n", "\n" . "> ", $header . "\n> " . $body . "\n> "));
		return TRUE;
	}
	function smtp_eom()
	{
		fputs($this -> sock, "\r\n.\r\n");
		$this -> smtp_debug(". [EOM]\n");
		return $this -> smtp_ok();
	}
	function smtp_ok()
	{
		$response = str_replace("\r\n", "", fgets($this -> sock, 512));
		$this -> smtp_debug($response . "\n");
		if (!ereg("^[23]", $response)){
			fputs($this -> sock, "QUIT\r\n");
			fgets($this -> sock, 512);
			$this -> log_write("Error: Remote host returned \"" . $response . "\"\n");
			return FALSE;
		}
		return TRUE;
	}
	function smtp_putcmd($cmd, $arg = "")
	{
		if ($arg != ""){
			if($cmd == "") $cmd = $arg;
			else $cmd = $cmd . " " . $arg;
		}
		fputs($this -> sock, $cmd . "\r\n");
		$this -> smtp_debug("> " . $cmd . "\n");
		return $this -> smtp_ok();
	}
	function smtp_error($string)
	{
		$this -> log_write("Error: Error occurred while " . $string . ".\n");
		return FALSE;
	}
	function log_write($message)
	{
		$this -> smtp_debug($message);
		if ($this -> log_file == ""){
			return TRUE;
		}
		$message = date("M d H:i:s ") . get_current_user() . "[" . getmypid() . "]: " . $message;
		if (!is_file($this -> log_file) || !($fp = @fopen($this -> log_file, "a"))){
			$this -> smtp_debug("Warning: Cannot open log file \"" . $this -> log_file . "\"\n");
			return FALSE;;
		}
		flock($fp, LOCK_EX);
		fputs($fp, $message);
		fclose($fp);
		return TRUE;
	}
	function strip_comment($address)
	{
		$comment = "\([^()]*\)";
		while (ereg($comment, $address)){
			$address = ereg_replace($comment, "", $address);
		}
		return $address;
	}
	function get_address($address)
	{
		$address = ereg_replace("([ \t\r\n])+", "", $address);
		$address = ereg_replace("^.*<(.+)>.*$", "\1", $address);
		return $address;
	}
	function smtp_debug($message)
	{
		if ($this -> debug){
			echo $message;
		}
	}
}
?>
