| 1 | <?php |
| 2 | /** |
| 3 | * Deliver.class.php |
| 4 | * |
| 5 | * Copyright (c) 1999-2004 The SquirrelMail Project Team |
| 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 | * |
| 11 | * $Id$ |
| 12 | * |
| 13 | * @author Marc Groot Koerkamp |
| 14 | * @package squirrelmail |
| 15 | */ |
| 16 | |
| 17 | /** |
| 18 | * Deliver Class - called to actually deliver the message |
| 19 | * |
| 20 | * This class is called by compose.php and other code that needs |
| 21 | * to send messages. All delivery functionality should be centralized |
| 22 | * in this class. |
| 23 | * |
| 24 | * Do not place UI code in this class, as UI code should be placed in templates |
| 25 | * going forward. |
| 26 | * |
| 27 | * @author Marc Groot Koerkamp |
| 28 | * @package squirrelmail |
| 29 | */ |
| 30 | class Deliver { |
| 31 | |
| 32 | /** |
| 33 | * function mail - send the message parts to the SMTP stream |
| 34 | * |
| 35 | * @param Message $message Message class to send |
| 36 | * @param resource $stream file handle to the SMTP stream |
| 37 | * |
| 38 | * @return integer $raw_length |
| 39 | */ |
| 40 | function mail($message, $stream=false) { |
| 41 | $rfc822_header = $message->rfc822_header; |
| 42 | if (count($message->entities)) { |
| 43 | $boundary = $this->mimeBoundary(); |
| 44 | $rfc822_header->content_type->properties['boundary']='"'.$boundary.'"'; |
| 45 | } else { |
| 46 | $boundary=''; |
| 47 | } |
| 48 | $raw_length = 0; |
| 49 | $reply_rfc822_header = (isset($message->reply_rfc822_header) |
| 50 | ? $message->reply_rfc822_header : ''); |
| 51 | $header = $this->prepareRFC822_Header($rfc822_header, $reply_rfc822_header, $raw_length); |
| 52 | |
| 53 | if ($stream) { |
| 54 | $this->preWriteToStream($header); |
| 55 | $this->writeToStream($stream, $header); |
| 56 | } |
| 57 | $this->writeBody($message, $stream, $raw_length, $boundary); |
| 58 | return $raw_length; |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * function writeBody - generate and write the mime boundaries around each part to the stream |
| 63 | * |
| 64 | * Recursively formats and writes the MIME boundaries of the $message |
| 65 | * to the output stream. |
| 66 | * |
| 67 | * @param Message $message Message object to transform |
| 68 | * @param resource $stream SMTP output stream |
| 69 | * @param integer &$length_raw raw length of the message (part) |
| 70 | * as returned by mail fn |
| 71 | * @param string $boundary custom boundary to call, usually for subparts |
| 72 | * |
| 73 | * @return void |
| 74 | */ |
| 75 | function writeBody($message, $stream, &$length_raw, $boundary='') { |
| 76 | // calculate boundary in case of multidimensional mime structures |
| 77 | if ($boundary && $message->entity_id && count($message->entities)) { |
| 78 | if (strpos($boundary,'_part_')) { |
| 79 | $boundary = substr($boundary,0,strpos($boundary,'_part_')); |
| 80 | } |
| 81 | $boundary_new = $boundary . '_part_'.$message->entity_id; |
| 82 | } else { |
| 83 | $boundary_new = $boundary; |
| 84 | } |
| 85 | if ($boundary && !$message->rfc822_header) { |
| 86 | $s = '--'.$boundary."\r\n"; |
| 87 | $s .= $this->prepareMIME_Header($message, $boundary_new); |
| 88 | $length_raw += strlen($s); |
| 89 | if ($stream) { |
| 90 | $this->preWriteToStream($s); |
| 91 | $this->writeToStream($stream, $s); |
| 92 | } |
| 93 | } |
| 94 | $this->writeBodyPart($message, $stream, $length_raw); |
| 95 | |
| 96 | $last = false; |
| 97 | for ($i=0, $entCount=count($message->entities);$i<$entCount;$i++) { |
| 98 | $msg = $this->writeBody($message->entities[$i], $stream, $length_raw, $boundary_new); |
| 99 | if ($i == $entCount-1) $last = true; |
| 100 | } |
| 101 | if ($boundary && $last) { |
| 102 | $s = "--".$boundary_new."--\r\n\r\n"; |
| 103 | $length_raw += strlen($s); |
| 104 | if ($stream) { |
| 105 | $this->preWriteToStream($s); |
| 106 | $this->writeToStream($stream, $s); |
| 107 | } |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * function writeBodyPart - write each individual mimepart |
| 113 | * |
| 114 | * Recursively called by WriteBody to write each mime part to the SMTP stream |
| 115 | * |
| 116 | * @param Message $message Message object to transform |
| 117 | * @param resource $stream SMTP output stream |
| 118 | * @param integer &$length length of the message part |
| 119 | * as returned by mail fn |
| 120 | * |
| 121 | * @return void |
| 122 | */ |
| 123 | function writeBodyPart($message, $stream, &$length) { |
| 124 | if ($message->mime_header) { |
| 125 | $type0 = $message->mime_header->type0; |
| 126 | } else { |
| 127 | $type0 = $message->rfc822_header->content_type->type0; |
| 128 | } |
| 129 | |
| 130 | $body_part_trailing = $last = ''; |
| 131 | switch ($type0) |
| 132 | { |
| 133 | case 'text': |
| 134 | case 'message': |
| 135 | if ($message->body_part) { |
| 136 | $body_part = $message->body_part; |
| 137 | $length += $this->clean_crlf($body_part); |
| 138 | if ($stream) { |
| 139 | $this->preWriteToStream($body_part); |
| 140 | $this->writeToStream($stream, $body_part); |
| 141 | } |
| 142 | $last = $body_part; |
| 143 | } elseif ($message->att_local_name) { |
| 144 | $filename = $message->att_local_name; |
| 145 | $file = fopen ($filename, 'rb'); |
| 146 | while ($body_part = fgets($file, 4096)) { |
| 147 | $length += $this->clean_crlf($body_part); |
| 148 | if ($stream) { |
| 149 | $this->preWriteToStream($body_part); |
| 150 | $this->writeToStream($stream, $body_part); |
| 151 | } |
| 152 | $last = $body_part; |
| 153 | } |
| 154 | fclose($file); |
| 155 | } |
| 156 | break; |
| 157 | default: |
| 158 | if ($message->body_part) { |
| 159 | $body_part = $message->body_part; |
| 160 | $length += $this->clean_crlf($body_part); |
| 161 | if ($stream) { |
| 162 | $this->writeToStream($stream, $body_part); |
| 163 | } |
| 164 | } elseif ($message->att_local_name) { |
| 165 | $filename = $message->att_local_name; |
| 166 | $file = fopen ($filename, 'rb'); |
| 167 | $encoded = ''; |
| 168 | while ($tmp = fread($file, 570)) { |
| 169 | $body_part = chunk_split(base64_encode($tmp)); |
| 170 | $length += $this->clean_crlf($body_part); |
| 171 | if ($stream) { |
| 172 | $this->writeToStream($stream, $body_part); |
| 173 | } |
| 174 | } |
| 175 | fclose($file); |
| 176 | } |
| 177 | break; |
| 178 | } |
| 179 | $body_part_trailing = ''; |
| 180 | if ($last && substr($last,-1) != "\n") { |
| 181 | $body_part_trailing = "\r\n"; |
| 182 | } |
| 183 | if ($body_part_trailing) { |
| 184 | $length += strlen($body_part_trailing); |
| 185 | if ($stream) { |
| 186 | $this->preWriteToStream($body_part_trailing); |
| 187 | $this->writeToStream($stream, $body_part_trailing); |
| 188 | } |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | /** |
| 193 | * function clean_crlf - change linefeeds and newlines to legal characters |
| 194 | * |
| 195 | * The SMTP format only allows CRLF as line terminators. |
| 196 | * This function replaces illegal teminators with the correct terminator. |
| 197 | * |
| 198 | * @param string &$s string to clean linefeeds on |
| 199 | * |
| 200 | * @return void |
| 201 | */ |
| 202 | function clean_crlf(&$s) { |
| 203 | $s = str_replace("\r\n", "\n", $s); |
| 204 | $s = str_replace("\r", "\n", $s); |
| 205 | $s = str_replace("\n", "\r\n", $s); |
| 206 | return strlen($s); |
| 207 | } |
| 208 | |
| 209 | /** |
| 210 | * function strip_crlf - strip linefeeds and newlines from a string |
| 211 | * |
| 212 | * The SMTP format only allows CRLF as line terminators. |
| 213 | * This function strips all line terminators from the string. |
| 214 | * |
| 215 | * @param string &$s string to clean linefeeds on |
| 216 | * |
| 217 | * @return void |
| 218 | */ |
| 219 | function strip_crlf(&$s) { |
| 220 | $s = str_replace("\r\n ", '', $s); |
| 221 | $s = str_replace("\r", '', $s); |
| 222 | $s = str_replace("\n", '', $s); |
| 223 | } |
| 224 | |
| 225 | /** |
| 226 | * function preWriteToStream - reserved for extended functionality |
| 227 | * |
| 228 | * This function is not yet implemented. |
| 229 | * Reserved for extended functionality. |
| 230 | * |
| 231 | * @param string &$s string to operate on |
| 232 | * |
| 233 | * @return void |
| 234 | */ |
| 235 | function preWriteToStream(&$s) { |
| 236 | } |
| 237 | |
| 238 | /** |
| 239 | * function writeToStream - write data to the SMTP stream |
| 240 | * |
| 241 | * @param resource $stream SMTP output stream |
| 242 | * @param string $data string with data to send to the SMTP stream |
| 243 | * |
| 244 | * @return void |
| 245 | */ |
| 246 | function writeToStream($stream, $data) { |
| 247 | fputs($stream, $data); |
| 248 | } |
| 249 | |
| 250 | /** |
| 251 | * function initStream - reserved for extended functionality |
| 252 | * |
| 253 | * This function is not yet implemented. |
| 254 | * Reserved for extended functionality. |
| 255 | * |
| 256 | * @param Message $message Message object |
| 257 | * @param string $host host name or IP to connect to |
| 258 | * @param string $user username to log into the SMTP server with |
| 259 | * @param string $pass password to log into the SMTP server with |
| 260 | * @param integer $length |
| 261 | * |
| 262 | * @return handle $stream file handle resource to SMTP stream |
| 263 | */ |
| 264 | function initStream($message, $length=0, $host='', $port='', $user='', $pass='') { |
| 265 | return $stream; |
| 266 | } |
| 267 | |
| 268 | /** |
| 269 | * function getBCC - reserved for extended functionality |
| 270 | * |
| 271 | * This function is not yet implemented. |
| 272 | * Reserved for extended functionality. |
| 273 | * |
| 274 | */ |
| 275 | function getBCC() { |
| 276 | return false; |
| 277 | } |
| 278 | |
| 279 | /** |
| 280 | * function prepareMIME_Header - creates the mime header |
| 281 | * |
| 282 | * @param Message $message Message object to act on |
| 283 | * @param string $boundary mime boundary from fn MimeBoundary |
| 284 | * |
| 285 | * @return string $header properly formatted mime header |
| 286 | */ |
| 287 | function prepareMIME_Header($message, $boundary) { |
| 288 | $mime_header = $message->mime_header; |
| 289 | $rn="\r\n"; |
| 290 | $header = array(); |
| 291 | |
| 292 | $contenttype = 'Content-Type: '. $mime_header->type0 .'/'. |
| 293 | $mime_header->type1; |
| 294 | if (count($message->entities)) { |
| 295 | $contenttype .= ";\r\n " . 'boundary="'.$boundary.'"'; |
| 296 | } |
| 297 | if (isset($mime_header->parameters['name'])) { |
| 298 | $contenttype .= '; name="'. |
| 299 | encodeHeader($mime_header->parameters['name']). '"'; |
| 300 | } |
| 301 | if (isset($mime_header->parameters['charset'])) { |
| 302 | $charset = $mime_header->parameters['charset']; |
| 303 | $contenttype .= '; charset="'. |
| 304 | encodeHeader($charset). '"'; |
| 305 | } |
| 306 | |
| 307 | $header[] = $contenttype . $rn; |
| 308 | if ($mime_header->description) { |
| 309 | $header[] .= 'Content-Description: ' . $mime_header->description . $rn; |
| 310 | } |
| 311 | if ($mime_header->encoding) { |
| 312 | $encoding = $mime_header->encoding; |
| 313 | $header[] .= 'Content-Transfer-Encoding: ' . $mime_header->encoding . $rn; |
| 314 | } else { |
| 315 | if ($mime_header->type0 == 'text' || $mime_header->type0 == 'message') { |
| 316 | $header[] .= 'Content-Transfer-Encoding: 8bit' . $rn; |
| 317 | } else { |
| 318 | $header[] .= 'Content-Transfer-Encoding: base64' . $rn; |
| 319 | } |
| 320 | } |
| 321 | if ($mime_header->id) { |
| 322 | $header[] .= 'Content-ID: ' . $mime_header->id . $rn; |
| 323 | } |
| 324 | if ($mime_header->disposition) { |
| 325 | $disposition = $mime_header->disposition; |
| 326 | $contentdisp = 'Content-Disposition: ' . $disposition->name; |
| 327 | if ($disposition->getProperty('filename')) { |
| 328 | $contentdisp .= '; filename="'. |
| 329 | encodeHeader($disposition->getProperty('filename')). '"'; |
| 330 | } |
| 331 | $header[] = $contentdisp . $rn; |
| 332 | } |
| 333 | if ($mime_header->md5) { |
| 334 | $header[] .= 'Content-MD5: ' . $mime_header->md5 . $rn; |
| 335 | } |
| 336 | if ($mime_header->language) { |
| 337 | $header[] .= 'Content-Language: ' . $mime_header->language . $rn; |
| 338 | } |
| 339 | |
| 340 | $cnt = count($header); |
| 341 | $hdr_s = ''; |
| 342 | for ($i = 0 ; $i < $cnt ; $i++) { |
| 343 | $hdr_s .= $this->foldLine($header[$i], 78,str_pad('',4)); |
| 344 | } |
| 345 | $header = $hdr_s; |
| 346 | $header .= $rn; /* One blank line to separate mimeheader and body-entity */ |
| 347 | return $header; |
| 348 | } |
| 349 | |
| 350 | /** |
| 351 | * function prepareRFC822_Header - prepares the RFC822 header string from Rfc822Header object(s) |
| 352 | * |
| 353 | * This function takes the Rfc822Header object(s) and formats them |
| 354 | * into the RFC822Header string to send to the SMTP server as part |
| 355 | * of the SMTP message. |
| 356 | * |
| 357 | * @param Rfc822Header $rfc822_header |
| 358 | * @param Rfc822Header $reply_rfc822_header |
| 359 | * @param integer &$raw_length length of the message |
| 360 | * |
| 361 | * @return string $header |
| 362 | */ |
| 363 | function prepareRFC822_Header($rfc822_header, $reply_rfc822_header, &$raw_length) { |
| 364 | global $domain, $version, $username, $skip_SM_header; |
| 365 | |
| 366 | /* if server var SERVER_NAME not available, use $domain */ |
| 367 | if(!sqGetGlobalVar('SERVER_NAME', $SERVER_NAME, SQ_SERVER)) { |
| 368 | $SERVER_NAME = $domain; |
| 369 | } |
| 370 | |
| 371 | sqGetGlobalVar('REMOTE_ADDR', $REMOTE_ADDR, SQ_SERVER); |
| 372 | sqGetGlobalVar('REMOTE_PORT', $REMOTE_PORT, SQ_SERVER); |
| 373 | sqGetGlobalVar('REMOTE_HOST', $REMOTE_HOST, SQ_SERVER); |
| 374 | sqGetGlobalVar('HTTP_VIA', $HTTP_VIA, SQ_SERVER); |
| 375 | sqGetGlobalVar('HTTP_X_FORWARDED_FOR', $HTTP_X_FORWARDED_FOR, SQ_SERVER); |
| 376 | |
| 377 | $rn = "\r\n"; |
| 378 | |
| 379 | /* This creates an RFC 822 date */ |
| 380 | $date = date('D, j M Y H:i:s ', mktime()) . $this->timezone(); |
| 381 | /* Create a message-id */ |
| 382 | $message_id = '<' . $REMOTE_PORT . '.' . $REMOTE_ADDR . '.'; |
| 383 | $message_id .= time() . '.squirrel@' . $REMOTE_ADDR .'>'; |
| 384 | /* Make an RFC822 Received: line */ |
| 385 | if (isset($REMOTE_HOST)) { |
| 386 | $received_from = "$REMOTE_HOST ([$REMOTE_ADDR])"; |
| 387 | } else { |
| 388 | $received_from = $REMOTE_ADDR; |
| 389 | } |
| 390 | if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) { |
| 391 | if (!isset($HTTP_X_FORWARDED_FOR) || $HTTP_X_FORWARDED_FOR == '') { |
| 392 | $HTTP_X_FORWARDED_FOR = 'unknown'; |
| 393 | } |
| 394 | $received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)"; |
| 395 | } |
| 396 | $header = array(); |
| 397 | if ( !isset($skip_SM_header) || !$skip_SM_header ) |
| 398 | { |
| 399 | $header[] = "Received: from $received_from" . $rn; |
| 400 | $header[] = " (SquirrelMail authenticated user $username);" . $rn; |
| 401 | $header[] = " by $SERVER_NAME with HTTP;" . $rn; |
| 402 | $header[] = " $date" . $rn; |
| 403 | } |
| 404 | /* Insert the rest of the header fields */ |
| 405 | $header[] = 'Message-ID: '. $message_id . $rn; |
| 406 | if ($reply_rfc822_header->message_id) { |
| 407 | $rep_message_id = $reply_rfc822_header->message_id; |
| 408 | // $this->strip_crlf($message_id); |
| 409 | $header[] = 'In-Reply-To: '.$rep_message_id . $rn; |
| 410 | $references = $this->calculate_references($reply_rfc822_header); |
| 411 | $header[] = 'References: '.$references . $rn; |
| 412 | } |
| 413 | $header[] = "Date: $date" . $rn; |
| 414 | $header[] = 'Subject: '.encodeHeader($rfc822_header->subject) . $rn; |
| 415 | $header[] = 'From: '. $rfc822_header->getAddr_s('from',',',true) . $rn; |
| 416 | /* RFC2822 if from contains more then 1 address */ |
| 417 | if (count($rfc822_header->from) > 1) { |
| 418 | $header[] = 'Sender: '. $rfc822_header->getAddr_s('sender',',',true) . $rn; |
| 419 | } |
| 420 | if (count($rfc822_header->to)) { |
| 421 | $header[] = 'To: '. $rfc822_header->getAddr_s('to',',',true) . $rn; |
| 422 | } |
| 423 | if (count($rfc822_header->cc)) { |
| 424 | $header[] = 'Cc: '. $rfc822_header->getAddr_s('cc',',',true) . $rn; |
| 425 | } |
| 426 | if (count($rfc822_header->reply_to)) { |
| 427 | $header[] = 'Reply-To: '. $rfc822_header->getAddr_s('reply_to',',',true) . $rn; |
| 428 | } |
| 429 | /* Sendmail should return true. Default = false */ |
| 430 | $bcc = $this->getBcc(); |
| 431 | if (count($rfc822_header->bcc)) { |
| 432 | $s = 'Bcc: '. $rfc822_header->getAddr_s('bcc',',',true) . $rn; |
| 433 | if (!$bcc) { |
| 434 | $s = $this->foldLine($s, 78, str_pad('',4)); |
| 435 | $raw_length += strlen($s); |
| 436 | } else { |
| 437 | $header[] = $s; |
| 438 | } |
| 439 | } |
| 440 | /* Identify SquirrelMail */ |
| 441 | $header[] = 'User-Agent: SquirrelMail/' . $version . $rn; |
| 442 | /* Do the MIME-stuff */ |
| 443 | $header[] = 'MIME-Version: 1.0' . $rn; |
| 444 | $contenttype = 'Content-Type: '. $rfc822_header->content_type->type0 .'/'. |
| 445 | $rfc822_header->content_type->type1; |
| 446 | if (count($rfc822_header->content_type->properties)) { |
| 447 | foreach ($rfc822_header->content_type->properties as $k => $v) { |
| 448 | if ($k && $v) { |
| 449 | $contenttype .= ';' .$k.'='.$v; |
| 450 | } |
| 451 | } |
| 452 | } |
| 453 | $header[] = $contenttype . $rn; |
| 454 | if ($encoding = $rfc822_header->encoding) { |
| 455 | $header[] .= 'Content-Transfer-Encoding: ' . $encoding . $rn; |
| 456 | } |
| 457 | if ($rfc822_header->dnt) { |
| 458 | $dnt = $rfc822_header->getAddr_s('dnt'); |
| 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) { |
| 465 | switch($rfc822_header->priority) |
| 466 | { |
| 467 | case 1: |
| 468 | $header[] = 'X-Priority: 1 (Highest)'.$rn; |
| 469 | $header[] = 'Importance: High'. $rn; break; |
| 470 | case 3: |
| 471 | $header[] = 'X-Priority: 3 (Normal)'.$rn; |
| 472 | $header[] = 'Importance: Normal'. $rn; break; |
| 473 | case 5: |
| 474 | $header[] = 'X-Priority: 5 (Lowest)'.$rn; |
| 475 | $header[] = 'Importance: Low'. $rn; break; |
| 476 | default: break; |
| 477 | } |
| 478 | } |
| 479 | /* Insert headers from the $more_headers array */ |
| 480 | if(count($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 | $hdr_s = ''; |
| 488 | |
| 489 | for ($i = 0 ; $i < $cnt ; $i++) { |
| 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; |
| 511 | default: $hdr_s .= $this->foldLine($header[$i], 78, str_pad('',4)); break; |
| 512 | } |
| 513 | } |
| 514 | $header = $hdr_s; |
| 515 | $header .= $rn; /* One blank line to separate header and body */ |
| 516 | $raw_length += strlen($header); |
| 517 | return $header; |
| 518 | } |
| 519 | |
| 520 | /** |
| 521 | * function foldLine - for cleanly folding of headerlines |
| 522 | * |
| 523 | * @param string $line |
| 524 | * @param integer $length length to fold the line at |
| 525 | * @param string $pre prefix the line with... |
| 526 | * |
| 527 | * @return string $line folded line with trailing CRLF |
| 528 | */ |
| 529 | function foldLine($line, $length, $pre='') { |
| 530 | $line = substr($line,0, -2); |
| 531 | $length -= 2; /* do not fold between \r and \n */ |
| 532 | $cnt = strlen($line); |
| 533 | if ($cnt > $length) { /* try folding */ |
| 534 | $fold_string = "\r\n " . $pre; |
| 535 | $bFirstFold = false; |
| 536 | $aFoldLine = array(); |
| 537 | while (strlen($line) > $length) { |
| 538 | $fold = false; |
| 539 | /* handle encoded parts */ |
| 540 | if (preg_match('/(=\?([^?]*)\?(Q|B)\?([^?]*)\?=)(\s+|.*)/Ui',$line,$regs)) { |
| 541 | $fold_tmp = $regs[1]; |
| 542 | if (!trim($regs[5])) { |
| 543 | $fold_tmp .= $regs[5]; |
| 544 | } |
| 545 | $iPosEnc = strpos($line,$fold_tmp); |
| 546 | $iLengthEnc = strlen($fold_tmp); |
| 547 | $iPosEncEnd = $iPosEnc+$iLengthEnc; |
| 548 | if ($iPosEnc < $length && (($iPosEncEnd) > $length)) { |
| 549 | $fold = true; |
| 550 | /* fold just before the start of the encoded string */ |
| 551 | if ($iPosEnc) { |
| 552 | $aFoldLine[] = substr($line,0,$iPosEnc); |
| 553 | } |
| 554 | $line = substr($line,$iPosEnc); |
| 555 | if (!$bFirstFold) { |
| 556 | $bFirstFold = true; |
| 557 | $length -= strlen($fold_string); |
| 558 | } |
| 559 | if ($iLengthEnc > $length) { /* place the encoded |
| 560 | string on a separate line and do not fold inside it*/ |
| 561 | /* minimize foldstring */ |
| 562 | $fold_string = "\r\n "; |
| 563 | $aFoldLine[] = substr($line,0,$iLengthEnc); |
| 564 | $line = substr($line,$iLengthEnc); |
| 565 | } |
| 566 | } else if ($iPosEnc < $length) { /* the encoded string fits into the foldlength */ |
| 567 | /*remainder */ |
| 568 | $sLineRem = substr($line,$iPosEncEnd,$length - $iPosEncEnd); |
| 569 | if (preg_match('/^(=\?([^?]*)\?(Q|B)\?([^?]*)\?=)(.*)/Ui',$sLineRem) || !preg_match('/[=,;\s]/',$sLineRem)) { |
| 570 | /*impossible to fold clean in the next part -> fold after the enc string */ |
| 571 | $aFoldLine[] = substr($line,0,$iPosEncEnd); |
| 572 | $line = substr($line,$iPosEncEnd); |
| 573 | $fold = true; |
| 574 | if (!$bFirstFold) { |
| 575 | $bFirstFold = true; |
| 576 | $length -= strlen($fold_string); |
| 577 | } |
| 578 | } |
| 579 | } |
| 580 | } |
| 581 | if (!$fold) { |
| 582 | $line_tmp = substr($line,0,$length); |
| 583 | $iFoldPos = false; |
| 584 | /* try to fold at logical places */ |
| 585 | switch (true) |
| 586 | { |
| 587 | case ($iFoldPos = strrpos($line_tmp,',')): break; |
| 588 | case ($iFoldPos = strrpos($line_tmp,';')): break; |
| 589 | case ($iFoldPos = strrpos($line_tmp,' ')): break; |
| 590 | case ($iFoldPos = strrpos($line_tmp,'=')): break; |
| 591 | default: break; |
| 592 | } |
| 593 | |
| 594 | if (!$iFoldPos) { /* clean folding didn't work */ |
| 595 | $iFoldPos = $length; |
| 596 | } |
| 597 | $aFoldLine[] = substr($line,0,$iFoldPos+1); |
| 598 | $line = substr($line,$iFoldPos+1); |
| 599 | if (!$bFirstFold) { |
| 600 | $bFirstFold = true; |
| 601 | $length -= strlen($fold_string); |
| 602 | } |
| 603 | } |
| 604 | } |
| 605 | /*$reconstruct the line */ |
| 606 | if ($line) { |
| 607 | $aFoldLine[] = $line; |
| 608 | } |
| 609 | $line = implode($fold_string,$aFoldLine); |
| 610 | } |
| 611 | return $line."\r\n"; |
| 612 | } |
| 613 | |
| 614 | /** |
| 615 | * function mimeBoundary - calculates the mime boundary to use |
| 616 | * |
| 617 | * This function will generate a random mime boundary base part |
| 618 | * for the message if the boundary has not already been set. |
| 619 | * |
| 620 | * @return string $mimeBoundaryString random mime boundary string |
| 621 | */ |
| 622 | function mimeBoundary () { |
| 623 | static $mimeBoundaryString; |
| 624 | |
| 625 | if ( !isset( $mimeBoundaryString ) || |
| 626 | $mimeBoundaryString == '') { |
| 627 | $mimeBoundaryString = '----=_' . date( 'YmdHis' ) . '_' . |
| 628 | mt_rand( 10000, 99999 ); |
| 629 | } |
| 630 | return $mimeBoundaryString; |
| 631 | } |
| 632 | |
| 633 | /** |
| 634 | * function timezone - Time offset for correct timezone |
| 635 | * |
| 636 | * @return string $result with timezone and offset |
| 637 | */ |
| 638 | function timezone () { |
| 639 | global $invert_time; |
| 640 | |
| 641 | $diff_second = date('Z'); |
| 642 | if ($invert_time) { |
| 643 | $diff_second = - $diff_second; |
| 644 | } |
| 645 | if ($diff_second > 0) { |
| 646 | $sign = '+'; |
| 647 | } else { |
| 648 | $sign = '-'; |
| 649 | } |
| 650 | $diff_second = abs($diff_second); |
| 651 | $diff_hour = floor ($diff_second / 3600); |
| 652 | $diff_minute = floor (($diff_second-3600*$diff_hour) / 60); |
| 653 | $zonename = '('.strftime('%Z').')'; |
| 654 | $result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute, |
| 655 | $zonename); |
| 656 | return ($result); |
| 657 | } |
| 658 | |
| 659 | /** |
| 660 | * function calculate_references - calculate correct Referer string |
| 661 | * |
| 662 | * @param Rfc822Header $hdr message header to calculate from |
| 663 | * |
| 664 | * @return string $refer concatenated and trimmed Referer string |
| 665 | */ |
| 666 | function calculate_references($hdr) { |
| 667 | $refer = $hdr->references; |
| 668 | $message_id = $hdr->message_id; |
| 669 | $in_reply_to = $hdr->in_reply_to; |
| 670 | if (strlen($refer) > 2) { |
| 671 | $refer .= ' ' . $message_id; |
| 672 | } else { |
| 673 | if ($in_reply_to) { |
| 674 | $refer .= $in_reply_to . ' ' . $message_id; |
| 675 | } else { |
| 676 | $refer .= $message_id; |
| 677 | } |
| 678 | } |
| 679 | trim($refer); |
| 680 | return $refer; |
| 681 | } |
| 682 | } |
| 683 | ?> |