[squirrelmail.git] / class / deliver / Deliver.class.php

<?php

/**
 * Deliver.class.php
 *
 * Copyright (c) 1999-2003 The SquirrelMail Project Team
 * Licensed under the GNU GPL. For full terms see the file COPYING.
 *
 * This contains all the functions needed to send messages through
 * a delivery backend.
 *
 * $Id$
 */

class Deliver {

    function mail($message, $stream=false) {
       $rfc822_header = $message->rfc822_header;
       if (count($message->entities)) {
          $boundary = $this->mimeBoundary();
	  $rfc822_header->content_type->properties['boundary']='"'.$boundary.'"';
       } else {
          $boundary='';
       }
       $raw_length = 0;
       $reply_rfc822_header = (isset($message->reply_rfc822_header) 
        	             ? $message->reply_rfc822_header : '');
       $header = $this->prepareRFC822_Header($rfc822_header, $reply_rfc822_header, $raw_length);

       if ($stream) {
            $this->preWriteToStream($header);
            $this->writeToStream($stream, $header);
       }
       $this->writeBody($message, $stream, $raw_length, $boundary);
       return $raw_length;
    }
    
    function writeBody($message, $stream, &$length_raw, $boundary='') {
        if ($boundary && !$message->rfc822_header) {
	    $s = '--'.$boundary."\r\n";
	    $s .= $this->prepareMIME_Header($message, $boundary);
	    $length_raw += strlen($s);
	    if ($stream) {
                $this->preWriteToStream($s);
		$this->writeToStream($stream, $s);
	    }
        }
	$this->writeBodyPart($message, $stream, $length_raw);
	$boundary_depth = substr_count($message->entity_id,'.');
	if ($boundary_depth) {
	   $boundary .= '_part'.$boundary_depth;
	}
	$last = false;
	for ($i=0, $entCount=count($message->entities);$i<$entCount;$i++) {
    	    $msg = $this->writeBody($message->entities[$i], $stream, $length_raw, $boundary);
	    if ($i == $entCount-1) $last = true;
	}
        if ($boundary && $last) {
	    $s = "--".$boundary."--\r\n\r\n";
	    $length_raw += strlen($s);
	    if ($stream) {
                $this->preWriteToStream($s);
		$this->writeToStream($stream, $s);
	    }
	}
    }

    function writeBodyPart($message, $stream, &$length) {
        if ($message->mime_header) {
	   $type0 = $message->mime_header->type0;
	} else {
	   $type0 = $message->rfc822_header->content_type->type0;
	}
	
	$body_part_trailing = $last = '';
	switch ($type0) {
	case 'text':
	case 'message':
	    if ($message->body_part) {
	       $body_part = $message->body_part;
	       $length += $this->clean_crlf($body_part);
	       if ($stream) {
                  $this->preWriteToStream($body_part);     
	          $this->writeToStream($stream, $body_part);
	       }
	       $last = $body_part;
	    } elseif ($message->att_local_name) {
	        $filename = $message->att_local_name;
		$file = fopen ($filename, 'rb');
		while ($body_part = fgets($file, 4096)) {
		   $length += $this->clean_crlf($body_part);
		   if ($stream) {
		      $this->preWriteToStream($body_part);
		      $this->writeToStream($stream, $body_part);
                   }
		   $last = $body_part;
		}
		fclose($file);
            }
	    break;
	default:
	    if ($message->body_part) {
	       $body_part = $message->body_part;
	       $length += $this->clean_crlf($body_part);
	       if ($stream) {
	          $this->writeToStream($stream, $body_part);
    	       }
	    } elseif ($message->att_local_name) {
	        $filename = $message->att_local_name;
		$file = fopen ($filename, 'rb');
		$encoded = '';
		while ($tmp = fread($file, 570)) {
		   $body_part = chunk_split(base64_encode($tmp));
		   $length += $this->clean_crlf($body_part);
		   if ($stream) {
		      $this->writeToStream($stream, $body_part);
		   }
		}
		fclose($file);
	    }
	    break;
	}
	$body_part_trailing = '';
	if ($last && substr($last,-1) != "\n") {
	   $body_part_trailing = "\r\n";
	}
	if ($body_part_trailing) {
	    $length += strlen($body_part_trailing);
	    if ($stream) {
        	$this->preWriteToStream($body_part_trailing);     
		$this->writeToStream($stream, $body_part_trailing);
	    }
	}
    }
    
    function clean_crlf(&$s) {
        $s = str_replace("\r\n", "\n", $s);
        $s = str_replace("\r", "\n", $s);
        $s = str_replace("\n", "\r\n", $s);
	return strlen($s);
    }
    
    function strip_crlf(&$s) {
        $s = str_replace("\r\n ", '', $s);
	$s = str_replace("\r", '', $s);
	$s = str_replace("\n", '', $s);
    }

    function preWriteToStream(&$s) {
    }
    
    function writeToStream($stream, $data) {
       fputs($stream, $data);
    }
    
    function initStream($message, $length=0, $host='', $port='', $user='', $pass='') {
       return $stream;
    }
    
    function getBcc() {
       return false;
    }

    function prepareMIME_Header($message, $boundary) {
	$mime_header = $message->mime_header;
	$rn="\r\n";
	$header = array();
	
	$contenttype = 'Content-Type: '. $mime_header->type0 .'/'.
    	               $mime_header->type1;
	if (count($message->entities)) {
	    $contenttype .= ";\r\n " . 'boundary="'.$boundary.'"';
	}		       
	if (isset($mime_header->parameters['name'])) {
    	    $contenttype .= '; name="'.
        	encodeHeader($mime_header->parameters['name']). '"';
	}
	if (isset($mime_header->parameters['charset'])) {
	    $charset = $mime_header->parameters['charset'];
    	    $contenttype .= '; charset="'.
        	encodeHeader($charset). '"';
	}


	$header[] = $contenttype . $rn;
	if ($mime_header->description) {
    	    $header[] .= 'Content-Description: ' . $mime_header->description . $rn;
	}
	if ($mime_header->encoding) {
	    $encoding = $mime_header->encoding;
    	    $header[] .= 'Content-Transfer-Encoding: ' . $mime_header->encoding . $rn;
	} else {
	    if ($mime_header->type0 == 'text' || $mime_header->type0 == 'message') {
		$header[] .= 'Content-Transfer-Encoding: 8bit' .  $rn;
    	    } else {
		$header[] .= 'Content-Transfer-Encoding: base64' .  $rn;
	    }
	}
	if ($mime_header->id) {
    	    $header[] .= 'Content-ID: ' . $mime_header->id . $rn;
	}
	if ($mime_header->disposition) {
	    $disposition = $mime_header->disposition;
    	    $contentdisp = 'Content-Disposition: ' . $disposition->name;
    	    if ($disposition->getProperty('filename')) {
        	$contentdisp .= '; filename="'.
        	    encodeHeader($disposition->getProperty('filename')). '"';
    	    }
    	    $header[] = $contentdisp . $rn;       
	}
	if ($mime_header->md5) {
    	    $header[] .= 'Content-MD5: ' . $mime_header->md5 . $rn;
	}
	if ($mime_header->language) {
    	    $header[] .= 'Content-Language: ' . $mime_header->language . $rn;
	}

	$cnt = count($header);
	$hdr_s = '';
	for ($i = 0 ; $i < $cnt ; $i++)	{
    	    $hdr_s .= $this->foldLine($header[$i], 78,str_pad('',4));
	}
	$header = $hdr_s;
	$header .= $rn; /* One blank line to separate mimeheader and body-entity */
	return $header;
    }    

    function prepareRFC822_Header($rfc822_header, $reply_rfc822_header, &$raw_length) {
        $REMOTE_ADDR = $_SERVER['REMOTE_ADDR'];
        $SERVER_NAME = $_SERVER['SERVER_NAME'];
        $REMOTE_PORT = $_SERVER['REMOTE_PORT'];
        if(isset($_SERVER['REMOTE_HOST'])) {
            $REMOTE_HOST = $_SERVER['REMOTE_HOST'];
        }
        if(isset($_SERVER['HTTP_VIA'])) {
            $HTTP_VIA = $_SERVER['HTTP_VIA'];
        }
        if(isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
            $HTTP_X_FORWARDED_FOR = $_SERVER['HTTP_X_FORWARDED_FOR'];
        }
	global $version, $username;
	$rn = "\r\n";
	/* This creates an RFC 822 date */
	$date = date('D, j M Y H:i:s ', mktime()) . $this->timezone();
	/* Create a message-id */
	$message_id = '<' . $REMOTE_PORT . '.' . $REMOTE_ADDR . '.';
	$message_id .= time() . '.squirrel@' . $SERVER_NAME .'>';
	/* Make an RFC822 Received: line */
	if (isset($REMOTE_HOST)) {
    	    $received_from = "$REMOTE_HOST ([$REMOTE_ADDR])";
	} else {
    	    $received_from = $REMOTE_ADDR;
	}
	if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) {
    	    if (!isset($HTTP_X_FORWARDED_FOR) || $HTTP_X_FORWARDED_FOR == '') {
        	$HTTP_X_FORWARDED_FOR = 'unknown';
    	    }
    	    $received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)";
	}
	$header = array();
	$header[] = "Received: from $received_from" . $rn;
        $header[] = "        (SquirrelMail authenticated user $username)" . $rn;
        $header[] = "        by $SERVER_NAME with HTTP;" . $rn;
	$header[] = "        $date" . $rn;
        /* Insert the rest of the header fields */
        $header[] = 'Message-ID: '. $message_id . $rn;
        if ($reply_rfc822_header->message_id) {
	    $rep_message_id = $reply_rfc822_header->message_id;
//	    $this->strip_crlf($message_id);
	    $header[] = 'In-Reply-To: '.$rep_message_id . $rn;
    	    $references = $this->calculate_references($reply_rfc822_header);
	    $header[] = 'References: '.$references . $rn;
	}	
	$header[] = "Date: $date" . $rn;
        $header[] = 'Subject: '.encodeHeader($rfc822_header->subject) . $rn;
        $header[] = 'From: '. $rfc822_header->getAddr_s('from',',',true) . $rn;
	/* RFC2822 if from contains more then 1 address */	
        if (count($rfc822_header->from) > 1) {
	    $header[] = 'Sender: '. $rfc822_header->getAddr_s('sender',',',true) . $rn;
	}
	if (count($rfc822_header->to)) {
	    $header[] = 'To: '. $rfc822_header->getAddr_s('to',',',true) . $rn;
        }
	if (count($rfc822_header->cc)) {
	    $header[] = 'Cc: '. $rfc822_header->getAddr_s('cc',',',true) . $rn;
	}
	if (count($rfc822_header->reply_to)) {
	    $header[] = 'Reply-To: '. $rfc822_header->getAddr_s('reply_to',',',true) . $rn;
	}
	/* Sendmail should return true. Default = false */
	$bcc = $this->getBcc();
	if (count($rfc822_header->bcc)) {
	    $s = 'Bcc: '. $rfc822_header->getAddr_s('bcc',',',true) . $rn;
	    if (!$bcc) {
	       $s = $this->foldLine($s, 78, str_pad('',4));
	       $raw_length += strlen($s);
	    } else {
	       $header[] = $s;
	    }
	}
	/* Identify SquirrelMail */	
	$header[] = 'User-Agent: SquirrelMail/' . $version . $rn; 
	/* Do the MIME-stuff */
	$header[] = 'MIME-Version: 1.0' . $rn;
	$contenttype = 'Content-Type: '. $rfc822_header->content_type->type0 .'/'.
                                         $rfc822_header->content_type->type1;
	if (count($rfc822_header->content_type->properties)) {
    	    foreach ($rfc822_header->content_type->properties as $k => $v) {
	        if ($k && $v) {
        	    $contenttype .= ';' .$k.'='.$v; 
		}
    	    }
	}
        $header[] = $contenttype . $rn;
        if ($rfc822_header->dnt) {
	    $dnt = $rfc822_header->getAddr_s('dnt'); 
    	    /* Pegasus Mail */
    	    $header[] = 'X-Confirm-Reading-To: '.$dnt. $rn;
    	    /* RFC 2298 */
    	    $header[] = 'Disposition-Notification-To: '.$dnt. $rn;
	}
	if ($rfc822_header->priority) {
    	    $prio = $rfc822_header->priority;
	    $header[] = 'X-Priority: '.$prio. $rn;
    	    switch($prio) {
    	      case 1: $header[] = 'Importance: High'. $rn; break;
    	      case 3: $header[] = 'Importance: Normal'. $rn; break;
    	      case 5: $header[] = 'Importance: Low'. $rn; break;
	      default: break;
    	    }
	}
	/* Insert headers from the $more_headers array */	
	if(count($rfc822_header->more_headers)) {
    	    reset($rfc822_header->more_headers);
    	    foreach ($rfc822_header->more_headers as $k => $v) {
    		$header[] = $k.': '.$v .$rn;
    	    }	       
	}        
	$cnt = count($header);
	$hdr_s = '';
	for ($i = 0 ; $i < $cnt ; $i++) {
    	    $hdr_s .= $this->foldLine($header[$i], 78, str_pad('',4));
	}
//	$debug = "Debug: <123456789012345678901234567890123456789012345678901234567890123456789>\r\n";
//	$this->foldLine($debug, 78, str_pad('',4));
	$header = $hdr_s;
	$header .= $rn; /* One blank line to separate header and body */
	$raw_length += strlen($header);
	return $header;
    }

    /*
    * function for cleanly folding of headerlines
    */
    function foldLine($line, $length, $pre='') {
        $line = substr($line,0, -2);
        $length -= 2; /* do not fold between \r and \n */
        $cnt = strlen($line);
        if ($cnt > $length) { /* try folding */
            $fold_string = "\r\n " . $pre;
            $bFirstFold = false;
            $aFoldLine = array();
            while (strlen($line) > $length) {
                $fold = false;
                /* handle encoded parts */
                if (preg_match('/(=\?.+\?.+\?.+\?=)/',$line,$regs)) {
                    $fold_tmp = $regs[1];
                    $iPosEnc = strpos($line,$fold_tmp);
                    $iLengthEnc = strlen($fold_tmp);
                    if ($iPosEnc < $length && ($iPosEnc + $iLengthEnc > $length)) {
                        $fold = true;
                        /* fold just before the start of the encoded string */
                        $aFoldLine[] = substr($line,0,$iPosEnc);
                        $line = substr($line,$iPosEnc);
                        if (!$bFirstFold) {
                            $bFirstFold = true;
                            $length -= strlen($fold_string);
                        }
                        if ($iLengthEnc > $length) { /* place the encoded
                            string on a separate line and do not fold inside it*/
                            if ($iLengthEnc < (998 - strlen($fold_string))) { 
                                $aFoldLine[] = substr($line,0,$iLengthEnc);
                                $line = substr($line,$iLengthEnc);
                            } else { /* line is too long, continue with normal folding */
                                $fold = false;
                            }
                        }
                    } else { /* the encoded string fits into the foldlength */
                        /*remainder */
                        $iPosEncEnd = $iPosEnc+$iLengthEnc;
                        $sLineRem = substr($line,$iPosEncEnd,$length - $iPosEncEnd);
                        if (!preg_match('/[=,;\s]/',$sLineRem)) {
                            /*impossible to fold clean in the next part -> fold after the enc string */
                            $aFoldLine[] = substr($line,0,$iPosEncEnd+1);
                            $line = substr($line,$iPosEncEnd+1);
                            $fold = true;
                            if (!$bFirstFold) {
                                $bFirstFold = true;
                                $length -= strlen($fold_string);
                            }
                        }
                    }
                }
                if (!$fold) {
                    $line_tmp = substr($line,0,$length);
                    $iFoldPos = false;
                    /* try to fold at logical places */
                    switch (true)
                    {
                    case ($iFoldPos = strrpos($line_tmp,',')): break;
                    case ($iFoldPos = strrpos($line_tmp,';')): break;
                    case ($iFoldPos = strrpos($line_tmp,' ')): break;
                    case ($iFoldPos = strrpos($line_tmp,'=')): break;
                    default: break;
                    }
                    
                    if (!$iFoldPos) { /* clean folding didn't work */
                        $iFoldPos = $length;
                    }
                    $aFoldLine[] = substr($line,0,$iFoldPos+1);
                    $line = substr($line,$iFoldPos+1);
                    if (!$bFirstFold) {
                        $bFirstFold = true;
                        $length -= strlen($fold_string);
                    }
                }
            }
            /*$reconstruct the line */
            if ($line) {
                $aFoldLine[] = $line;
            }
            $line = implode($fold_string,$aFoldLine);
        }
        return $line."\r\n";
    }

    function mimeBoundary () {
	static $mimeBoundaryString;

	if ( !isset( $mimeBoundaryString ) ||
    	    $mimeBoundaryString == '') {
    	    $mimeBoundaryString = '----=_' . date( 'YmdHis' ) . '_' .
        	mt_rand( 10000, 99999 );
	}
	return $mimeBoundaryString;
    }

    /* Time offset for correct timezone */
    function timezone () {
	global $invert_time;
    
	$diff_second = date('Z');
	if ($invert_time) {
    	    $diff_second = - $diff_second;
	}
	if ($diff_second > 0) {
    	    $sign = '+';
	} else {
    	    $sign = '-';
	}
	$diff_second = abs($diff_second);
	$diff_hour = floor ($diff_second / 3600);
	$diff_minute = floor (($diff_second-3600*$diff_hour) / 60);
	$zonename = '('.strftime('%Z').')';
	$result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute, 
                       $zonename);
	return ($result);
    }

    function calculate_references($hdr) {
        $refer = $hdr->references;
	$message_id = $hdr->message_id;
	$in_reply_to = $hdr->in_reply_to;
	if (strlen($refer) > 2) {
    	    $refer .= ' ' . $message_id;
	} else {
    	    if ($in_reply_to) {
        	$refer .= $in_reply_to . ' ' . $message_id;
    	    } else {
        	$refer .= $message_id;
    	    }                        
	}
	trim($refer);
	return $refer;
    }
}
?>
Commit	Line	Data
	1	<?php
	2
	3	/**
	4	* Deliver.class.php
	5	*
	6	* Copyright (c) 1999-2003 The SquirrelMail Project Team
	7	* Licensed under the GNU GPL. For full terms see the file COPYING.
	8	*
	9	* This contains all the functions needed to send messages through
	10	* a delivery backend.
	11	*
	12	* $Id$
	13	*/
	14
	15	class Deliver {
	16
	17	function mail($message, $stream=false) {
	18	$rfc822_header = $message->rfc822_header;
	19	if (count($message->entities)) {
	20	$boundary = $this->mimeBoundary();
	21	$rfc822_header->content_type->properties['boundary']='"'.$boundary.'"';
	22	} else {
	23	$boundary='';
	24	}
	25	$raw_length = 0;
	26	$reply_rfc822_header = (isset($message->reply_rfc822_header)
	27	? $message->reply_rfc822_header : '');
	28	$header = $this->prepareRFC822_Header($rfc822_header, $reply_rfc822_header, $raw_length);
	29
	30	if ($stream) {
	31	$this->preWriteToStream($header);
	32	$this->writeToStream($stream, $header);
	33	}
	34	$this->writeBody($message, $stream, $raw_length, $boundary);
	35	return $raw_length;
	36	}
	37
	38	function writeBody($message, $stream, &$length_raw, $boundary='') {
	39	if ($boundary && !$message->rfc822_header) {
	40	$s = '--'.$boundary."\r\n";
	41	$s .= $this->prepareMIME_Header($message, $boundary);
	42	$length_raw += strlen($s);
	43	if ($stream) {
	44	$this->preWriteToStream($s);
	45	$this->writeToStream($stream, $s);
	46	}
	47	}
	48	$this->writeBodyPart($message, $stream, $length_raw);
	49	$boundary_depth = substr_count($message->entity_id,'.');
	50	if ($boundary_depth) {
	51	$boundary .= '_part'.$boundary_depth;
	52	}
	53	$last = false;
	54	for ($i=0, $entCount=count($message->entities);$i<$entCount;$i++) {
	55	$msg = $this->writeBody($message->entities[$i], $stream, $length_raw, $boundary);
	56	if ($i == $entCount-1) $last = true;
	57	}
	58	if ($boundary && $last) {
	59	$s = "--".$boundary."--\r\n\r\n";
	60	$length_raw += strlen($s);
	61	if ($stream) {
	62	$this->preWriteToStream($s);
	63	$this->writeToStream($stream, $s);
	64	}
	65	}
	66	}
	67
	68	function writeBodyPart($message, $stream, &$length) {
	69	if ($message->mime_header) {
	70	$type0 = $message->mime_header->type0;
	71	} else {
	72	$type0 = $message->rfc822_header->content_type->type0;
	73	}
	74
	75	$body_part_trailing = $last = '';
	76	switch ($type0) {
	77	case 'text':
	78	case 'message':
	79	if ($message->body_part) {
	80	$body_part = $message->body_part;
	81	$length += $this->clean_crlf($body_part);
	82	if ($stream) {
	83	$this->preWriteToStream($body_part);
	84	$this->writeToStream($stream, $body_part);
	85	}
	86	$last = $body_part;
	87	} elseif ($message->att_local_name) {
	88	$filename = $message->att_local_name;
	89	$file = fopen ($filename, 'rb');
	90	while ($body_part = fgets($file, 4096)) {
	91	$length += $this->clean_crlf($body_part);
	92	if ($stream) {
	93	$this->preWriteToStream($body_part);
	94	$this->writeToStream($stream, $body_part);
	95	}
	96	$last = $body_part;
	97	}
	98	fclose($file);
	99	}
	100	break;
	101	default:
	102	if ($message->body_part) {
	103	$body_part = $message->body_part;
	104	$length += $this->clean_crlf($body_part);
	105	if ($stream) {
	106	$this->writeToStream($stream, $body_part);
	107	}
	108	} elseif ($message->att_local_name) {
	109	$filename = $message->att_local_name;
	110	$file = fopen ($filename, 'rb');
	111	$encoded = '';
	112	while ($tmp = fread($file, 570)) {
	113	$body_part = chunk_split(base64_encode($tmp));
	114	$length += $this->clean_crlf($body_part);
	115	if ($stream) {
	116	$this->writeToStream($stream, $body_part);
	117	}
	118	}
	119	fclose($file);
	120	}
	121	break;
	122	}
	123	$body_part_trailing = '';
	124	if ($last && substr($last,-1) != "\n") {
	125	$body_part_trailing = "\r\n";
	126	}
	127	if ($body_part_trailing) {
	128	$length += strlen($body_part_trailing);
	129	if ($stream) {
	130	$this->preWriteToStream($body_part_trailing);
	131	$this->writeToStream($stream, $body_part_trailing);
	132	}
	133	}
	134	}
	135
	136	function clean_crlf(&$s) {
	137	$s = str_replace("\r\n", "\n", $s);
	138	$s = str_replace("\r", "\n", $s);
	139	$s = str_replace("\n", "\r\n", $s);
	140	return strlen($s);
	141	}
	142
	143	function strip_crlf(&$s) {
	144	$s = str_replace("\r\n ", '', $s);
	145	$s = str_replace("\r", '', $s);
	146	$s = str_replace("\n", '', $s);
	147	}
	148
	149	function preWriteToStream(&$s) {
	150	}
	151
	152	function writeToStream($stream, $data) {
	153	fputs($stream, $data);
	154	}
	155
	156	function initStream($message, $length=0, $host='', $port='', $user='', $pass='') {
	157	return $stream;
	158	}
	159
	160	function getBcc() {
	161	return false;
	162	}
	163
	164	function prepareMIME_Header($message, $boundary) {
	165	$mime_header = $message->mime_header;
	166	$rn="\r\n";
	167	$header = array();
	168
	169	$contenttype = 'Content-Type: '. $mime_header->type0 .'/'.
	170	$mime_header->type1;
	171	if (count($message->entities)) {
	172	$contenttype .= ";\r\n " . 'boundary="'.$boundary.'"';
	173	}
	174	if (isset($mime_header->parameters['name'])) {
	175	$contenttype .= '; name="'.
	176	encodeHeader($mime_header->parameters['name']). '"';
	177	}
	178	if (isset($mime_header->parameters['charset'])) {
	179	$charset = $mime_header->parameters['charset'];
	180	$contenttype .= '; charset="'.
	181	encodeHeader($charset). '"';
	182	}
	183
	184
	185	$header[] = $contenttype . $rn;
	186	if ($mime_header->description) {
	187	$header[] .= 'Content-Description: ' . $mime_header->description . $rn;
	188	}
	189	if ($mime_header->encoding) {
	190	$encoding = $mime_header->encoding;
	191	$header[] .= 'Content-Transfer-Encoding: ' . $mime_header->encoding . $rn;
	192	} else {
	193	if ($mime_header->type0 == 'text' \|\| $mime_header->type0 == 'message') {
	194	$header[] .= 'Content-Transfer-Encoding: 8bit' . $rn;
	195	} else {
	196	$header[] .= 'Content-Transfer-Encoding: base64' . $rn;
	197	}
	198	}
	199	if ($mime_header->id) {
	200	$header[] .= 'Content-ID: ' . $mime_header->id . $rn;
	201	}
	202	if ($mime_header->disposition) {
	203	$disposition = $mime_header->disposition;
	204	$contentdisp = 'Content-Disposition: ' . $disposition->name;
	205	if ($disposition->getProperty('filename')) {
	206	$contentdisp .= '; filename="'.
	207	encodeHeader($disposition->getProperty('filename')). '"';
	208	}
	209	$header[] = $contentdisp . $rn;
	210	}
	211	if ($mime_header->md5) {
	212	$header[] .= 'Content-MD5: ' . $mime_header->md5 . $rn;
	213	}
	214	if ($mime_header->language) {
	215	$header[] .= 'Content-Language: ' . $mime_header->language . $rn;
	216	}
	217
	218	$cnt = count($header);
	219	$hdr_s = '';
	220	for ($i = 0 ; $i < $cnt ; $i++) {
	221	$hdr_s .= $this->foldLine($header[$i], 78,str_pad('',4));
	222	}
	223	$header = $hdr_s;
	224	$header .= $rn; /* One blank line to separate mimeheader and body-entity */
	225	return $header;
	226	}
	227
	228	function prepareRFC822_Header($rfc822_header, $reply_rfc822_header, &$raw_length) {
	229	$REMOTE_ADDR = $_SERVER['REMOTE_ADDR'];
	230	$SERVER_NAME = $_SERVER['SERVER_NAME'];
	231	$REMOTE_PORT = $_SERVER['REMOTE_PORT'];
	232	if(isset($_SERVER['REMOTE_HOST'])) {
	233	$REMOTE_HOST = $_SERVER['REMOTE_HOST'];
	234	}
	235	if(isset($_SERVER['HTTP_VIA'])) {
	236	$HTTP_VIA = $_SERVER['HTTP_VIA'];
	237	}
	238	if(isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
	239	$HTTP_X_FORWARDED_FOR = $_SERVER['HTTP_X_FORWARDED_FOR'];
	240	}
	241	global $version, $username;
	242	$rn = "\r\n";
	243	/* This creates an RFC 822 date */
	244	$date = date('D, j M Y H:i:s ', mktime()) . $this->timezone();
	245	/* Create a message-id */
	246	$message_id = '<' . $REMOTE_PORT . '.' . $REMOTE_ADDR . '.';
	247	$message_id .= time() . '.squirrel@' . $SERVER_NAME .'>';
	248	/* Make an RFC822 Received: line */
	249	if (isset($REMOTE_HOST)) {
	250	$received_from = "$REMOTE_HOST ([$REMOTE_ADDR])";
	251	} else {
	252	$received_from = $REMOTE_ADDR;
	253	}
	254	if (isset($HTTP_VIA) \|\| isset ($HTTP_X_FORWARDED_FOR)) {
	255	if (!isset($HTTP_X_FORWARDED_FOR) \|\| $HTTP_X_FORWARDED_FOR == '') {
	256	$HTTP_X_FORWARDED_FOR = 'unknown';
	257	}
	258	$received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)";
	259	}
	260	$header = array();
	261	$header[] = "Received: from $received_from" . $rn;
	262	$header[] = " (SquirrelMail authenticated user $username)" . $rn;
	263	$header[] = " by $SERVER_NAME with HTTP;" . $rn;
	264	$header[] = " $date" . $rn;
	265	/* Insert the rest of the header fields */
	266	$header[] = 'Message-ID: '. $message_id . $rn;
	267	if ($reply_rfc822_header->message_id) {
	268	$rep_message_id = $reply_rfc822_header->message_id;
	269	// $this->strip_crlf($message_id);
	270	$header[] = 'In-Reply-To: '.$rep_message_id . $rn;
	271	$references = $this->calculate_references($reply_rfc822_header);
	272	$header[] = 'References: '.$references . $rn;
	273	}
	274	$header[] = "Date: $date" . $rn;
	275	$header[] = 'Subject: '.encodeHeader($rfc822_header->subject) . $rn;
	276	$header[] = 'From: '. $rfc822_header->getAddr_s('from',',',true) . $rn;
	277	/* RFC2822 if from contains more then 1 address */
	278	if (count($rfc822_header->from) > 1) {
	279	$header[] = 'Sender: '. $rfc822_header->getAddr_s('sender',',',true) . $rn;
	280	}
	281	if (count($rfc822_header->to)) {
	282	$header[] = 'To: '. $rfc822_header->getAddr_s('to',',',true) . $rn;
	283	}
	284	if (count($rfc822_header->cc)) {
	285	$header[] = 'Cc: '. $rfc822_header->getAddr_s('cc',',',true) . $rn;
	286	}
	287	if (count($rfc822_header->reply_to)) {
	288	$header[] = 'Reply-To: '. $rfc822_header->getAddr_s('reply_to',',',true) . $rn;
	289	}
	290	/* Sendmail should return true. Default = false */
	291	$bcc = $this->getBcc();
	292	if (count($rfc822_header->bcc)) {
	293	$s = 'Bcc: '. $rfc822_header->getAddr_s('bcc',',',true) . $rn;
	294	if (!$bcc) {
	295	$s = $this->foldLine($s, 78, str_pad('',4));
	296	$raw_length += strlen($s);
	297	} else {
	298	$header[] = $s;
	299	}
	300	}
	301	/* Identify SquirrelMail */
	302	$header[] = 'User-Agent: SquirrelMail/' . $version . $rn;
	303	/* Do the MIME-stuff */
	304	$header[] = 'MIME-Version: 1.0' . $rn;
	305	$contenttype = 'Content-Type: '. $rfc822_header->content_type->type0 .'/'.
	306	$rfc822_header->content_type->type1;
	307	if (count($rfc822_header->content_type->properties)) {
	308	foreach ($rfc822_header->content_type->properties as $k => $v) {
	309	if ($k && $v) {
	310	$contenttype .= ';' .$k.'='.$v;
	311	}
	312	}
	313	}
	314	$header[] = $contenttype . $rn;
	315	if ($rfc822_header->dnt) {
	316	$dnt = $rfc822_header->getAddr_s('dnt');
	317	/* Pegasus Mail */
	318	$header[] = 'X-Confirm-Reading-To: '.$dnt. $rn;
	319	/* RFC 2298 */
	320	$header[] = 'Disposition-Notification-To: '.$dnt. $rn;
	321	}
	322	if ($rfc822_header->priority) {
	323	$prio = $rfc822_header->priority;
	324	$header[] = 'X-Priority: '.$prio. $rn;
	325	switch($prio) {
	326	case 1: $header[] = 'Importance: High'. $rn; break;
	327	case 3: $header[] = 'Importance: Normal'. $rn; break;
	328	case 5: $header[] = 'Importance: Low'. $rn; break;
	329	default: break;
	330	}
	331	}
	332	/* Insert headers from the $more_headers array */
	333	if(count($rfc822_header->more_headers)) {
	334	reset($rfc822_header->more_headers);
	335	foreach ($rfc822_header->more_headers as $k => $v) {
	336	$header[] = $k.': '.$v .$rn;
	337	}
	338	}
	339	$cnt = count($header);
	340	$hdr_s = '';
	341	for ($i = 0 ; $i < $cnt ; $i++) {
	342	$hdr_s .= $this->foldLine($header[$i], 78, str_pad('',4));
	343	}
	344	// $debug = "Debug: <123456789012345678901234567890123456789012345678901234567890123456789>\r\n";
	345	// $this->foldLine($debug, 78, str_pad('',4));
	346	$header = $hdr_s;
	347	$header .= $rn; /* One blank line to separate header and body */
	348	$raw_length += strlen($header);
	349	return $header;
	350	}
	351
	352	/*
	353	* function for cleanly folding of headerlines
	354	*/
	355	function foldLine($line, $length, $pre='') {
	356	$line = substr($line,0, -2);
	357	$length -= 2; /* do not fold between \r and \n */
	358	$cnt = strlen($line);
	359	if ($cnt > $length) { /* try folding */
	360	$fold_string = "\r\n " . $pre;
	361	$bFirstFold = false;
	362	$aFoldLine = array();
	363	while (strlen($line) > $length) {
	364	$fold = false;
	365	/* handle encoded parts */
	366	if (preg_match('/(=\?.+\?.+\?.+\?=)/',$line,$regs)) {
	367	$fold_tmp = $regs[1];
	368	$iPosEnc = strpos($line,$fold_tmp);
	369	$iLengthEnc = strlen($fold_tmp);
	370	if ($iPosEnc < $length && ($iPosEnc + $iLengthEnc > $length)) {
	371	$fold = true;
	372	/* fold just before the start of the encoded string */
	373	$aFoldLine[] = substr($line,0,$iPosEnc);
	374	$line = substr($line,$iPosEnc);
	375	if (!$bFirstFold) {
	376	$bFirstFold = true;
	377	$length -= strlen($fold_string);
	378	}
	379	if ($iLengthEnc > $length) { /* place the encoded
	380	string on a separate line and do not fold inside it*/
	381	if ($iLengthEnc < (998 - strlen($fold_string))) {
	382	$aFoldLine[] = substr($line,0,$iLengthEnc);
	383	$line = substr($line,$iLengthEnc);
	384	} else { /* line is too long, continue with normal folding */
	385	$fold = false;
	386	}
	387	}
	388	} else { /* the encoded string fits into the foldlength */
	389	/remainder /
	390	$iPosEncEnd = $iPosEnc+$iLengthEnc;
	391	$sLineRem = substr($line,$iPosEncEnd,$length - $iPosEncEnd);
	392	if (!preg_match('/[=,;\s]/',$sLineRem)) {
	393	/impossible to fold clean in the next part -> fold after the enc string /
	394	$aFoldLine[] = substr($line,0,$iPosEncEnd+1);
	395	$line = substr($line,$iPosEncEnd+1);
	396	$fold = true;
	397	if (!$bFirstFold) {
	398	$bFirstFold = true;
	399	$length -= strlen($fold_string);
	400	}
	401	}
	402	}
	403	}
	404	if (!$fold) {
	405	$line_tmp = substr($line,0,$length);
	406	$iFoldPos = false;
	407	/* try to fold at logical places */
	408	switch (true)
	409	{
	410	case ($iFoldPos = strrpos($line_tmp,',')): break;
	411	case ($iFoldPos = strrpos($line_tmp,';')): break;
	412	case ($iFoldPos = strrpos($line_tmp,' ')): break;
	413	case ($iFoldPos = strrpos($line_tmp,'=')): break;
	414	default: break;
	415	}
	416
	417	if (!$iFoldPos) { /* clean folding didn't work */
	418	$iFoldPos = $length;
	419	}
	420	$aFoldLine[] = substr($line,0,$iFoldPos+1);
	421	$line = substr($line,$iFoldPos+1);
	422	if (!$bFirstFold) {
	423	$bFirstFold = true;
	424	$length -= strlen($fold_string);
	425	}
	426	}
	427	}
	428	/$reconstruct the line /
	429	if ($line) {
	430	$aFoldLine[] = $line;
	431	}
	432	$line = implode($fold_string,$aFoldLine);
	433	}
	434	return $line."\r\n";
	435	}
	436
	437	function mimeBoundary () {
	438	static $mimeBoundaryString;
	439
	440	if ( !isset( $mimeBoundaryString ) \|\|
	441	$mimeBoundaryString == '') {
	442	$mimeBoundaryString = '----=_' . date( 'YmdHis' ) . '_' .
	443	mt_rand( 10000, 99999 );
	444	}
	445	return $mimeBoundaryString;
	446	}
	447
	448	/* Time offset for correct timezone */
	449	function timezone () {
	450	global $invert_time;
	451
	452	$diff_second = date('Z');
	453	if ($invert_time) {
	454	$diff_second = - $diff_second;
	455	}
	456	if ($diff_second > 0) {
	457	$sign = '+';
	458	} else {
	459	$sign = '-';
	460	}
	461	$diff_second = abs($diff_second);
	462	$diff_hour = floor ($diff_second / 3600);
	463	$diff_minute = floor (($diff_second-3600*$diff_hour) / 60);
	464	$zonename = '('.strftime('%Z').')';
	465	$result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute,
	466	$zonename);
	467	return ($result);
	468	}
	469
	470	function calculate_references($hdr) {
	471	$refer = $hdr->references;
	472	$message_id = $hdr->message_id;
	473	$in_reply_to = $hdr->in_reply_to;
	474	if (strlen($refer) > 2) {
	475	$refer .= ' ' . $message_id;
	476	} else {
	477	if ($in_reply_to) {
	478	$refer .= $in_reply_to . ' ' . $message_id;
	479	} else {
	480	$refer .= $message_id;
	481	}
	482	}
	483	trim($refer);
	484	return $refer;
	485	}
	486	}
	487	?>