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[squirrelmail.git] / class / deliver / Deliver.class.php
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4960ec8e 1<?php
69298c28 2/**
3 * Deliver.class.php
4 *
6c84ba1e 5 * Copyright (c) 1999-2005 The SquirrelMail Project Team
69298c28 6 * Licensed under the GNU GPL. For full terms see the file COPYING.
7 *
8 * This contains all the functions needed to send messages through
9 * a delivery backend.
10 *
883d9cd3 11 * @version $Id$
72b004e6 12 * @author Marc Groot Koerkamp
13 * @package squirrelmail
69298c28 14 */
15
72b004e6 16/**
17 * Deliver Class - called to actually deliver the message
18 *
19 * This class is called by compose.php and other code that needs
20 * to send messages. All delivery functionality should be centralized
21 * in this class.
22 *
23 * Do not place UI code in this class, as UI code should be placed in templates
24 * going forward.
25 *
26 * @author Marc Groot Koerkamp
27 * @package squirrelmail
28 */
4960ec8e 29class Deliver {
30
72b004e6 31 /**
32 * function mail - send the message parts to the SMTP stream
33 *
34 * @param Message $message Message class to send
35 * @param resource $stream file handle to the SMTP stream
36 *
3a70ee56 37 * @return integer $raw_length
72b004e6 38 */
59387d1c 39 function mail($message, $stream=false) {
78f39e78 40 $rfc822_header = $message->rfc822_header;
41 if (count($message->entities)) {
42 $boundary = $this->mimeBoundary();
43 $rfc822_header->content_type->properties['boundary']='"'.$boundary.'"';
44 } else {
45 $boundary='';
46 }
47 $raw_length = 0;
72b004e6 48 $reply_rfc822_header = (isset($message->reply_rfc822_header)
78f39e78 49 ? $message->reply_rfc822_header : '');
50 $header = $this->prepareRFC822_Header($rfc822_header, $reply_rfc822_header, $raw_length);
75b14a70 51
78f39e78 52 if ($stream) {
59387d1c 53 $this->preWriteToStream($header);
54 $this->writeToStream($stream, $header);
78f39e78 55 }
56 $this->writeBody($message, $stream, $raw_length, $boundary);
57 return $raw_length;
3b53d87f 58 }
78f39e78 59
72b004e6 60 /**
61 * function writeBody - generate and write the mime boundaries around each part to the stream
62 *
63 * Recursively formats and writes the MIME boundaries of the $message
64 * to the output stream.
65 *
66 * @param Message $message Message object to transform
67 * @param resource $stream SMTP output stream
68 * @param integer &$length_raw raw length of the message (part)
69 * as returned by mail fn
70 * @param string $boundary custom boundary to call, usually for subparts
71 *
3a70ee56 72 * @return void
72b004e6 73 */
3b53d87f 74 function writeBody($message, $stream, &$length_raw, $boundary='') {
caf6a9a4 75 // calculate boundary in case of multidimensional mime structures
76 if ($boundary && $message->entity_id && count($message->entities)) {
77 if (strpos($boundary,'_part_')) {
78 $boundary = substr($boundary,0,strpos($boundary,'_part_'));
79 }
80 $boundary_new = $boundary . '_part_'.$message->entity_id;
81 } else {
82 $boundary_new = $boundary;
83 }
1274f430 84 if ($boundary && !$message->rfc822_header) {
78f39e78 85 $s = '--'.$boundary."\r\n";
caf6a9a4 86 $s .= $this->prepareMIME_Header($message, $boundary_new);
78f39e78 87 $length_raw += strlen($s);
88 if ($stream) {
3b53d87f 89 $this->preWriteToStream($s);
78f39e78 90 $this->writeToStream($stream, $s);
91 }
92 }
93 $this->writeBodyPart($message, $stream, $length_raw);
72b004e6 94
78f39e78 95 $last = false;
96 for ($i=0, $entCount=count($message->entities);$i<$entCount;$i++) {
caf6a9a4 97 $msg = $this->writeBody($message->entities[$i], $stream, $length_raw, $boundary_new);
78f39e78 98 if ($i == $entCount-1) $last = true;
99 }
1274f430 100 if ($boundary && $last) {
dcc5c913 101 $s = "--".$boundary_new."--\r\n\r\n";
78f39e78 102 $length_raw += strlen($s);
103 if ($stream) {
3b53d87f 104 $this->preWriteToStream($s);
78f39e78 105 $this->writeToStream($stream, $s);
106 }
107 }
3b53d87f 108 }
109
72b004e6 110 /**
111 * function writeBodyPart - write each individual mimepart
112 *
113 * Recursively called by WriteBody to write each mime part to the SMTP stream
114 *
115 * @param Message $message Message object to transform
116 * @param resource $stream SMTP output stream
117 * @param integer &$length length of the message part
118 * as returned by mail fn
119 *
3a70ee56 120 * @return void
72b004e6 121 */
3b53d87f 122 function writeBodyPart($message, $stream, &$length) {
1274f430 123 if ($message->mime_header) {
78f39e78 124 $type0 = $message->mime_header->type0;
125 } else {
126 $type0 = $message->rfc822_header->content_type->type0;
127 }
128
129 $body_part_trailing = $last = '';
130 switch ($type0)
131 {
132 case 'text':
133 case 'message':
134 if ($message->body_part) {
135 $body_part = $message->body_part;
136 $length += $this->clean_crlf($body_part);
137 if ($stream) {
72b004e6 138 $this->preWriteToStream($body_part);
78f39e78 139 $this->writeToStream($stream, $body_part);
140 }
141 $last = $body_part;
142 } elseif ($message->att_local_name) {
143 $filename = $message->att_local_name;
144 $file = fopen ($filename, 'rb');
145 while ($body_part = fgets($file, 4096)) {
146 $length += $this->clean_crlf($body_part);
147 if ($stream) {
148 $this->preWriteToStream($body_part);
149 $this->writeToStream($stream, $body_part);
150 }
151 $last = $body_part;
152 }
153 fclose($file);
154 }
155 break;
156 default:
157 if ($message->body_part) {
158 $body_part = $message->body_part;
159 $length += $this->clean_crlf($body_part);
160 if ($stream) {
161 $this->writeToStream($stream, $body_part);
162 }
163 } elseif ($message->att_local_name) {
164 $filename = $message->att_local_name;
165 $file = fopen ($filename, 'rb');
78f39e78 166 while ($tmp = fread($file, 570)) {
167 $body_part = chunk_split(base64_encode($tmp));
168 $length += $this->clean_crlf($body_part);
169 if ($stream) {
170 $this->writeToStream($stream, $body_part);
171 }
172 }
173 fclose($file);
3b53d87f 174 }
78f39e78 175 break;
176 }
177 $body_part_trailing = '';
178 if ($last && substr($last,-1) != "\n") {
179 $body_part_trailing = "\r\n";
180 }
181 if ($body_part_trailing) {
182 $length += strlen($body_part_trailing);
183 if ($stream) {
184 $this->preWriteToStream($body_part_trailing);
185 $this->writeToStream($stream, $body_part_trailing);
186 }
187 }
3b53d87f 188 }
78f39e78 189
72b004e6 190 /**
191 * function clean_crlf - change linefeeds and newlines to legal characters
192 *
193 * The SMTP format only allows CRLF as line terminators.
194 * This function replaces illegal teminators with the correct terminator.
195 *
196 * @param string &$s string to clean linefeeds on
197 *
3a70ee56 198 * @return void
72b004e6 199 */
69298c28 200 function clean_crlf(&$s) {
3b53d87f 201 $s = str_replace("\r\n", "\n", $s);
202 $s = str_replace("\r", "\n", $s);
203 $s = str_replace("\n", "\r\n", $s);
78f39e78 204 return strlen($s);
3b53d87f 205 }
78f39e78 206
72b004e6 207 /**
208 * function strip_crlf - strip linefeeds and newlines from a string
209 *
210 * The SMTP format only allows CRLF as line terminators.
211 * This function strips all line terminators from the string.
212 *
213 * @param string &$s string to clean linefeeds on
214 *
3a70ee56 215 * @return void
72b004e6 216 */
e4f9307a 217 function strip_crlf(&$s) {
218 $s = str_replace("\r\n ", '', $s);
78f39e78 219 $s = str_replace("\r", '', $s);
220 $s = str_replace("\n", '', $s);
e4f9307a 221 }
3b53d87f 222
72b004e6 223 /**
224 * function preWriteToStream - reserved for extended functionality
225 *
226 * This function is not yet implemented.
227 * Reserved for extended functionality.
228 *
229 * @param string &$s string to operate on
230 *
3a70ee56 231 * @return void
72b004e6 232 */
69298c28 233 function preWriteToStream(&$s) {
3b53d87f 234 }
78f39e78 235
72b004e6 236 /**
237 * function writeToStream - write data to the SMTP stream
238 *
239 * @param resource $stream SMTP output stream
240 * @param string $data string with data to send to the SMTP stream
241 *
3a70ee56 242 * @return void
72b004e6 243 */
3b53d87f 244 function writeToStream($stream, $data) {
78f39e78 245 fputs($stream, $data);
3b53d87f 246 }
78f39e78 247
72b004e6 248 /**
249 * function initStream - reserved for extended functionality
250 *
251 * This function is not yet implemented.
252 * Reserved for extended functionality.
253 *
254 * @param Message $message Message object
255 * @param string $host host name or IP to connect to
256 * @param string $user username to log into the SMTP server with
257 * @param string $pass password to log into the SMTP server with
258 * @param integer $length
259 *
3a70ee56 260 * @return handle $stream file handle resource to SMTP stream
72b004e6 261 */
3b53d87f 262 function initStream($message, $length=0, $host='', $port='', $user='', $pass='') {
78f39e78 263 return $stream;
3b53d87f 264 }
72b004e6 265
266 /**
267 * function getBCC - reserved for extended functionality
268 *
269 * This function is not yet implemented.
270 * Reserved for extended functionality.
271 *
272 */
273 function getBCC() {
78f39e78 274 return false;
59387d1c 275 }
3b53d87f 276
72b004e6 277 /**
278 * function prepareMIME_Header - creates the mime header
279 *
280 * @param Message $message Message object to act on
281 * @param string $boundary mime boundary from fn MimeBoundary
282 *
3a70ee56 283 * @return string $header properly formatted mime header
72b004e6 284 */
3b53d87f 285 function prepareMIME_Header($message, $boundary) {
78f39e78 286 $mime_header = $message->mime_header;
287 $rn="\r\n";
288 $header = array();
1274f430 289
78f39e78 290 $contenttype = 'Content-Type: '. $mime_header->type0 .'/'.
291 $mime_header->type1;
292 if (count($message->entities)) {
293 $contenttype .= ";\r\n " . 'boundary="'.$boundary.'"';
294 }
295 if (isset($mime_header->parameters['name'])) {
296 $contenttype .= '; name="'.
297 encodeHeader($mime_header->parameters['name']). '"';
298 }
299 if (isset($mime_header->parameters['charset'])) {
300 $charset = $mime_header->parameters['charset'];
301 $contenttype .= '; charset="'.
302 encodeHeader($charset). '"';
303 }
1274f430 304
78f39e78 305 $header[] = $contenttype . $rn;
306 if ($mime_header->description) {
307 $header[] .= 'Content-Description: ' . $mime_header->description . $rn;
308 }
309 if ($mime_header->encoding) {
78f39e78 310 $header[] .= 'Content-Transfer-Encoding: ' . $mime_header->encoding . $rn;
311 } else {
312 if ($mime_header->type0 == 'text' || $mime_header->type0 == 'message') {
313 $header[] .= 'Content-Transfer-Encoding: 8bit' . $rn;
314 } else {
315 $header[] .= 'Content-Transfer-Encoding: base64' . $rn;
316 }
317 }
318 if ($mime_header->id) {
319 $header[] .= 'Content-ID: ' . $mime_header->id . $rn;
320 }
321 if ($mime_header->disposition) {
322 $disposition = $mime_header->disposition;
323 $contentdisp = 'Content-Disposition: ' . $disposition->name;
324 if ($disposition->getProperty('filename')) {
325 $contentdisp .= '; filename="'.
326 encodeHeader($disposition->getProperty('filename')). '"';
327 }
72b004e6 328 $header[] = $contentdisp . $rn;
78f39e78 329 }
330 if ($mime_header->md5) {
331 $header[] .= 'Content-MD5: ' . $mime_header->md5 . $rn;
332 }
333 if ($mime_header->language) {
334 $header[] .= 'Content-Language: ' . $mime_header->language . $rn;
335 }
4960ec8e 336
78f39e78 337 $cnt = count($header);
338 $hdr_s = '';
339 for ($i = 0 ; $i < $cnt ; $i++) {
340 $hdr_s .= $this->foldLine($header[$i], 78,str_pad('',4));
341 }
342 $header = $hdr_s;
343 $header .= $rn; /* One blank line to separate mimeheader and body-entity */
344 return $header;
345 }
4960ec8e 346
72b004e6 347 /**
348 * function prepareRFC822_Header - prepares the RFC822 header string from Rfc822Header object(s)
349 *
350 * This function takes the Rfc822Header object(s) and formats them
351 * into the RFC822Header string to send to the SMTP server as part
352 * of the SMTP message.
353 *
354 * @param Rfc822Header $rfc822_header
355 * @param Rfc822Header $reply_rfc822_header
356 * @param integer &$raw_length length of the message
357 *
3a70ee56 358 * @return string $header
72b004e6 359 */
75b14a70 360 function prepareRFC822_Header($rfc822_header, $reply_rfc822_header, &$raw_length) {
35aaf666 361 global $domain, $version, $username, $skip_SM_header;
60a46e65 362
78f39e78 363 /* if server var SERVER_NAME not available, use $domain */
60a46e65 364 if(!sqGetGlobalVar('SERVER_NAME', $SERVER_NAME, SQ_SERVER)) {
365 $SERVER_NAME = $domain;
78f39e78 366 }
60a46e65 367
78f39e78 368 sqGetGlobalVar('REMOTE_ADDR', $REMOTE_ADDR, SQ_SERVER);
369 sqGetGlobalVar('REMOTE_PORT', $REMOTE_PORT, SQ_SERVER);
370 sqGetGlobalVar('REMOTE_HOST', $REMOTE_HOST, SQ_SERVER);
371 sqGetGlobalVar('HTTP_VIA', $HTTP_VIA, SQ_SERVER);
372 sqGetGlobalVar('HTTP_X_FORWARDED_FOR', $HTTP_X_FORWARDED_FOR, SQ_SERVER);
60a46e65 373
78f39e78 374 $rn = "\r\n";
223872cb 375
78f39e78 376 /* This creates an RFC 822 date */
377 $date = date('D, j M Y H:i:s ', mktime()) . $this->timezone();
378 /* Create a message-id */
379 $message_id = '<' . $REMOTE_PORT . '.' . $REMOTE_ADDR . '.';
485e1181 380 $message_id .= time() . '.squirrel@' . $SERVER_NAME .'>';
78f39e78 381 /* Make an RFC822 Received: line */
382 if (isset($REMOTE_HOST)) {
383 $received_from = "$REMOTE_HOST ([$REMOTE_ADDR])";
384 } else {
385 $received_from = $REMOTE_ADDR;
386 }
387 if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) {
388 if (!isset($HTTP_X_FORWARDED_FOR) || $HTTP_X_FORWARDED_FOR == '') {
389 $HTTP_X_FORWARDED_FOR = 'unknown';
390 }
391 $received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)";
392 }
393 $header = array();
35aaf666 394 if ( !isset($skip_SM_header) || !$skip_SM_header )
395 {
396 $header[] = "Received: from $received_from" . $rn;
40a55a1b 397 $header[] = " (SquirrelMail authenticated user $username)" . $rn;
35aaf666 398 $header[] = " by $SERVER_NAME with HTTP;" . $rn;
399 $header[] = " $date" . $rn;
400 }
59387d1c 401 /* Insert the rest of the header fields */
402 $header[] = 'Message-ID: '. $message_id . $rn;
1274f430 403 if ($reply_rfc822_header->message_id) {
78f39e78 404 $rep_message_id = $reply_rfc822_header->message_id;
405 // $this->strip_crlf($message_id);
406 $header[] = 'In-Reply-To: '.$rep_message_id . $rn;
407 $references = $this->calculate_references($reply_rfc822_header);
408 $header[] = 'References: '.$references . $rn;
409 }
410 $header[] = "Date: $date" . $rn;
59387d1c 411 $header[] = 'Subject: '.encodeHeader($rfc822_header->subject) . $rn;
ac47827c 412 $header[] = 'From: '. $rfc822_header->getAddr_s('from',",$rn ",true) . $rn;
413
414 // folding address list [From|To|Cc|Bcc] happens by using ",$rn<space>" as delimiter
415 // Do not use foldLine for that.
416
417 // RFC2822 if from contains more then 1 address
59387d1c 418 if (count($rfc822_header->from) > 1) {
215de78c 419 $header[] = 'Sender: '. $rfc822_header->getAddr_s('sender',',',true) . $rn;
78f39e78 420 }
421 if (count($rfc822_header->to)) {
ac47827c 422 $header[] = 'To: '. $rfc822_header->getAddr_s('to',",$rn ",true) . $rn;
78f39e78 423 }
424 if (count($rfc822_header->cc)) {
ac47827c 425 $header[] = 'Cc: '. $rfc822_header->getAddr_s('cc',",$rn ",true) . $rn;
78f39e78 426 }
427 if (count($rfc822_header->reply_to)) {
215de78c 428 $header[] = 'Reply-To: '. $rfc822_header->getAddr_s('reply_to',',',true) . $rn;
78f39e78 429 }
430 /* Sendmail should return true. Default = false */
431 $bcc = $this->getBcc();
432 if (count($rfc822_header->bcc)) {
ac47827c 433 $s = 'Bcc: '. $rfc822_header->getAddr_s('bcc',",$rn ",true) . $rn;
78f39e78 434 if (!$bcc) {
78f39e78 435 $raw_length += strlen($s);
436 } else {
437 $header[] = $s;
438 }
439 }
72b004e6 440 /* Identify SquirrelMail */
caf6a9a4 441 $header[] = 'User-Agent: SquirrelMail/' . $version . $rn;
78f39e78 442 /* Do the MIME-stuff */
443 $header[] = 'MIME-Version: 1.0' . $rn;
444 $contenttype = 'Content-Type: '. $rfc822_header->content_type->type0 .'/'.
59387d1c 445 $rfc822_header->content_type->type1;
78f39e78 446 if (count($rfc822_header->content_type->properties)) {
447 foreach ($rfc822_header->content_type->properties as $k => $v) {
448 if ($k && $v) {
72b004e6 449 $contenttype .= ';' .$k.'='.$v;
78f39e78 450 }
451 }
452 }
59387d1c 453 $header[] = $contenttype . $rn;
78f39e78 454 if ($encoding = $rfc822_header->encoding) {
bfebbda2 455 $header[] .= 'Content-Transfer-Encoding: ' . $encoding . $rn;
72b004e6 456 }
59387d1c 457 if ($rfc822_header->dnt) {
72b004e6 458 $dnt = $rfc822_header->getAddr_s('dnt');
78f39e78 459 /* Pegasus Mail */
460 $header[] = 'X-Confirm-Reading-To: '.$dnt. $rn;
461 /* RFC 2298 */
462 $header[] = 'Disposition-Notification-To: '.$dnt. $rn;
463 }
464 if ($rfc822_header->priority) {
d1db3699 465 switch($rfc822_header->priority)
78f39e78 466 {
d1db3699 467 case 1:
91e0dccc 468 $header[] = 'X-Priority: 1 (Highest)'.$rn;
469 $header[] = 'Importance: High'. $rn; break;
d1db3699 470 case 3:
91e0dccc 471 $header[] = 'X-Priority: 3 (Normal)'.$rn;
472 $header[] = 'Importance: Normal'. $rn; break;
d1db3699 473 case 5:
91e0dccc 474 $header[] = 'X-Priority: 5 (Lowest)'.$rn;
475 $header[] = 'Importance: Low'. $rn; break;
78f39e78 476 default: break;
477 }
478 }
72b004e6 479 /* Insert headers from the $more_headers array */
78f39e78 480 if(count($rfc822_header->more_headers)) {
481 reset($rfc822_header->more_headers);
482 foreach ($rfc822_header->more_headers as $k => $v) {
483 $header[] = $k.': '.$v .$rn;
484 }
485 }
486 $cnt = count($header);
487 $hdr_s = '';
5d2a7b15 488
78f39e78 489 for ($i = 0 ; $i < $cnt ; $i++) {
5d2a7b15 490 $sKey = substr($header[$i],0,strpos($header[$i],':'));
491 switch ($sKey)
492 {
493 case 'Message-ID':
494 case 'In-Reply_To':
495 $hdr_s .= $header[$i];
496 break;
497 case 'References':
498 $sRefs = substr($header[$i],12);
499 $aRefs = explode(' ',$sRefs);
500 $sLine = 'References:';
501 foreach ($aRefs as $sReference) {
502 if (strlen($sLine)+strlen($sReference) >76) {
503 $hdr_s .= $sLine;
504 $sLine = $rn . ' ' . $sReference;
505 } else {
506 $sLine .= ' '. $sReference;
507 }
508 }
509 $hdr_s .= $sLine;
510 break;
ac47827c 511 case 'To':
512 case 'Cc':
513 case 'Bcc':
514 case 'From':
515 $hdr_s .= $header[$i];
516 break;
5d2a7b15 517 default: $hdr_s .= $this->foldLine($header[$i], 78, str_pad('',4)); break;
518 }
78f39e78 519 }
78f39e78 520 $header = $hdr_s;
521 $header .= $rn; /* One blank line to separate header and body */
522 $raw_length += strlen($header);
523 return $header;
4960ec8e 524 }
525
72b004e6 526 /**
527 * function foldLine - for cleanly folding of headerlines
528 *
529 * @param string $line
530 * @param integer $length length to fold the line at
531 * @param string $pre prefix the line with...
532 *
3a70ee56 533 * @return string $line folded line with trailing CRLF
72b004e6 534 */
1274f430 535 function foldLine($line, $length, $pre='') {
e4f9307a 536 $line = substr($line,0, -2);
fb1d6cb6 537 $length -= 2; /* do not fold between \r and \n */
538 $cnt = strlen($line);
539 if ($cnt > $length) { /* try folding */
540 $fold_string = "\r\n " . $pre;
541 $bFirstFold = false;
542 $aFoldLine = array();
543 while (strlen($line) > $length) {
544 $fold = false;
545 /* handle encoded parts */
7060c7f0 546 if (preg_match('/(=\?([^?]*)\?(Q|B)\?([^?]*)\?=)(\s+|.*)/Ui',$line,$regs)) {
fb1d6cb6 547 $fold_tmp = $regs[1];
7060c7f0 548 if (!trim($regs[5])) {
549 $fold_tmp .= $regs[5];
550 }
fb1d6cb6 551 $iPosEnc = strpos($line,$fold_tmp);
552 $iLengthEnc = strlen($fold_tmp);
c422e824 553 $iPosEncEnd = $iPosEnc+$iLengthEnc;
554 if ($iPosEnc < $length && (($iPosEncEnd) > $length)) {
fb1d6cb6 555 $fold = true;
556 /* fold just before the start of the encoded string */
7060c7f0 557 if ($iPosEnc) {
558 $aFoldLine[] = substr($line,0,$iPosEnc);
559 }
fb1d6cb6 560 $line = substr($line,$iPosEnc);
561 if (!$bFirstFold) {
562 $bFirstFold = true;
563 $length -= strlen($fold_string);
564 }
565 if ($iLengthEnc > $length) { /* place the encoded
566 string on a separate line and do not fold inside it*/
223872cb 567 /* minimize foldstring */
568 $fold_string = "\r\n ";
569 $aFoldLine[] = substr($line,0,$iLengthEnc);
570 $line = substr($line,$iLengthEnc);
72b004e6 571 }
c422e824 572 } else if ($iPosEnc < $length) { /* the encoded string fits into the foldlength */
fb1d6cb6 573 /*remainder */
fb1d6cb6 574 $sLineRem = substr($line,$iPosEncEnd,$length - $iPosEncEnd);
c422e824 575 if (preg_match('/^(=\?([^?]*)\?(Q|B)\?([^?]*)\?=)(.*)/Ui',$sLineRem) || !preg_match('/[=,;\s]/',$sLineRem)) {
fb1d6cb6 576 /*impossible to fold clean in the next part -> fold after the enc string */
7060c7f0 577 $aFoldLine[] = substr($line,0,$iPosEncEnd);
578 $line = substr($line,$iPosEncEnd);
fb1d6cb6 579 $fold = true;
580 if (!$bFirstFold) {
581 $bFirstFold = true;
582 $length -= strlen($fold_string);
583 }
72b004e6 584 }
fb1d6cb6 585 }
586 }
587 if (!$fold) {
588 $line_tmp = substr($line,0,$length);
589 $iFoldPos = false;
590 /* try to fold at logical places */
591 switch (true)
592 {
593 case ($iFoldPos = strrpos($line_tmp,',')): break;
594 case ($iFoldPos = strrpos($line_tmp,';')): break;
595 case ($iFoldPos = strrpos($line_tmp,' ')): break;
596 case ($iFoldPos = strrpos($line_tmp,'=')): break;
597 default: break;
598 }
72b004e6 599
fb1d6cb6 600 if (!$iFoldPos) { /* clean folding didn't work */
601 $iFoldPos = $length;
602 }
603 $aFoldLine[] = substr($line,0,$iFoldPos+1);
604 $line = substr($line,$iFoldPos+1);
605 if (!$bFirstFold) {
606 $bFirstFold = true;
607 $length -= strlen($fold_string);
608 }
609 }
610 }
611 /*$reconstruct the line */
612 if ($line) {
613 $aFoldLine[] = $line;
614 }
615 $line = implode($fold_string,$aFoldLine);
616 }
617 return $line."\r\n";
618 }
3b53d87f 619
72b004e6 620 /**
621 * function mimeBoundary - calculates the mime boundary to use
622 *
623 * This function will generate a random mime boundary base part
624 * for the message if the boundary has not already been set.
625 *
3a70ee56 626 * @return string $mimeBoundaryString random mime boundary string
72b004e6 627 */
59387d1c 628 function mimeBoundary () {
78f39e78 629 static $mimeBoundaryString;
3b53d87f 630
78f39e78 631 if ( !isset( $mimeBoundaryString ) ||
632 $mimeBoundaryString == '') {
633 $mimeBoundaryString = '----=_' . date( 'YmdHis' ) . '_' .
634 mt_rand( 10000, 99999 );
635 }
636 return $mimeBoundaryString;
3b53d87f 637 }
638
72b004e6 639 /**
640 * function timezone - Time offset for correct timezone
641 *
3a70ee56 642 * @return string $result with timezone and offset
72b004e6 643 */
59387d1c 644 function timezone () {
78f39e78 645 global $invert_time;
646
647 $diff_second = date('Z');
648 if ($invert_time) {
649 $diff_second = - $diff_second;
650 }
651 if ($diff_second > 0) {
652 $sign = '+';
653 } else {
654 $sign = '-';
655 }
656 $diff_second = abs($diff_second);
657 $diff_hour = floor ($diff_second / 3600);
658 $diff_minute = floor (($diff_second-3600*$diff_hour) / 60);
659 $zonename = '('.strftime('%Z').')';
72b004e6 660 $result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute,
3b53d87f 661 $zonename);
78f39e78 662 return ($result);
59387d1c 663 }
3b53d87f 664
72b004e6 665 /**
666 * function calculate_references - calculate correct Referer string
667 *
668 * @param Rfc822Header $hdr message header to calculate from
669 *
3a70ee56 670 * @return string $refer concatenated and trimmed Referer string
72b004e6 671 */
1274f430 672 function calculate_references($hdr) {
673 $refer = $hdr->references;
78f39e78 674 $message_id = $hdr->message_id;
675 $in_reply_to = $hdr->in_reply_to;
676 if (strlen($refer) > 2) {
677 $refer .= ' ' . $message_id;
678 } else {
679 if ($in_reply_to) {
680 $refer .= $in_reply_to . ' ' . $message_id;
681 } else {
682 $refer .= $message_id;
683 }
684 }
685 trim($refer);
686 return $refer;
59387d1c 687 }
688}
40a55a1b 689?>