6 * Copyright (c) 1999-2003 The SquirrelMail Project Team
7 * Licensed under the GNU GPL. For full terms see the file COPYING.
9 * This contains the functions necessary to detect and decode MIME
13 * @package squirrelmail
16 /** The typical includes... */
17 require_once(SM_PATH
. 'functions/imap.php');
18 require_once(SM_PATH
. 'functions/attachment_common.php');
20 /* -------------------------------------------------------------------------- */
22 /* -------------------------------------------------------------------------- */
25 * Get the MIME structure
27 * This function gets the structure of a message and stores it in the "message" class.
28 * It will return this object for use with all relevant header information and
29 * fully parsed into the standard "message" object format.
31 function mime_structure ($bodystructure, $flags=array()) {
33 /* Isolate the body structure and remove beginning and end parenthesis. */
34 $read = trim(substr ($bodystructure, strpos(strtolower($bodystructure), 'bodystructure') +
13));
35 $read = trim(substr ($read, 0, -1));
37 $msg = Message
::parseStructure($read,$i);
38 if (!is_object($msg)) {
39 include_once(SM_PATH
. 'functions/display_messages.php');
40 global $color, $mailbox;
41 /* removed urldecode because $_GET is auto urldecoded ??? */
42 displayPageHeader( $color, $mailbox );
43 $errormessage = _("SquirrelMail could not decode the bodystructure of the message");
44 $errormessage .= '<BR>'._("the provided bodystructure by your imap-server").':<BR><BR>';
45 $errormessage .= '<pre>' . htmlspecialchars($read) . '</pre>';
46 plain_error_message( $errormessage, $color );
47 echo '</body></html>';
51 foreach ($flags as $flag) {
52 $char = strtoupper($flag{1});
55 if (strtolower($flag) == '\\seen') {
60 if (strtolower($flag) == '\\answered') {
61 $msg->is_answered
= true;
65 if (strtolower($flag) == '\\deleted') {
66 $msg->is_deleted
= true;
70 if (strtolower($flag) == '\\flagged') {
71 $msg->is_flagged
= true;
75 if (strtolower($flag) == '$mdnsent') {
76 $msg->is_mdnsent
= true;
84 // listEntities($msg);
90 /* This starts the parsing of a particular structure. It is called recursively,
91 * so it can be passed different structures. It returns an object of type
93 * First, it checks to see if it is a multipart message. If it is, then it
94 * handles that as it sees is necessary. If it is just a regular entity,
95 * then it parses it and adds the necessary header information (by calling out
96 * to mime_get_elements()
99 function mime_fetch_body($imap_stream, $id, $ent_id=1, $fetch_size=0) {
101 /* Do a bit of error correction. If we couldn't find the entity id, just guess
102 * that it is the first one. That is usually the case anyway.
106 $cmd = "FETCH $id BODY[]";
108 $cmd = "FETCH $id BODY[$ent_id]";
111 if ($fetch_size!=0) $cmd .= "<0.$fetch_size>";
113 $data = sqimap_run_command ($imap_stream, $cmd, true, $response, $message, $uid_support);
115 $topline = trim(array_shift($data));
116 } while($topline && ($topline[0] == '*') && !preg_match('/\* [0-9]+ FETCH.*/i', $topline)) ;
118 $wholemessage = implode('', $data);
119 if (ereg('\\{([^\\}]*)\\}', $topline, $regs)) {
120 $ret = substr($wholemessage, 0, $regs[1]);
121 /* There is some information in the content info header that could be important
122 * in order to parse html messages. Let's get them here.
124 // if ($ret{0} == '<') {
125 // $data = sqimap_run_command ($imap_stream, "FETCH $id BODY[$ent_id.MIME]", true, $response, $message, $uid_support);
127 } else if (ereg('"([^"]*)"', $topline, $regs)) {
130 global $where, $what, $mailbox, $passed_id, $startMessage;
131 $par = 'mailbox=' . urlencode($mailbox) . '&passed_id=' . $passed_id;
132 if (isset($where) && isset($what)) {
133 $par .= '&where=' . urlencode($where) . '&what=' . urlencode($what);
135 $par .= '&startMessage=' . $startMessage . '&show_more=0';
137 $par .= '&response=' . urlencode($response) .
138 '&message=' . urlencode($message) .
139 '&topline=' . urlencode($topline);
142 '<table width="80%"><tr>' .
143 '<tr><td colspan=2>' .
144 _("Body retrieval error. The reason for this is most probably that the message is malformed.") .
146 '<tr><td><b>' . _("Command:") . "</td><td>$cmd</td></tr>" .
147 '<tr><td><b>' . _("Response:") . "</td><td>$response</td></tr>" .
148 '<tr><td><b>' . _("Message:") . "</td><td>$message</td></tr>" .
149 '<tr><td><b>' . _("FETCH line:") . "</td><td>$topline</td></tr>" .
150 "</table><BR></tt></font><hr>";
152 $data = sqimap_run_command ($imap_stream, "FETCH $passed_id BODY[]", true, $response, $message, $uid_support);
154 $wholemessage = implode('', $data);
156 $ret = $wholemessage;
161 function mime_print_body_lines ($imap_stream, $id, $ent_id=1, $encoding) {
164 /* Don't kill the connection if the browser is over a dialup
165 * and it would take over 30 seconds to download it.
166 * Dont call set_time_limit in safe mode.
169 if (!ini_get('safe_mode')) {
172 /* in case of base64 encoded attachments, do not buffer them.
173 Instead, echo the decoded attachment directly to screen */
174 if (strtolower($encoding) == 'base64') {
176 $query = "FETCH $id BODY[]";
178 $query = "FETCH $id BODY[$ent_id]";
180 sqimap_run_command($imap_stream,$query,true,$response,$message,$uid_support,'sqimap_base64_decode','php://stdout',true);
182 $body = mime_fetch_body ($imap_stream, $id, $ent_id);
183 echo decodeBody($body, $encoding);
187 TODO, use the same method for quoted printable.
188 However, I assume that quoted printable attachments aren't that large
189 so the performancegain / memory usage drop will be minimal.
190 If we decide to add that then we need to adapt sqimap_fread because
191 we need to split te result on \n and fread doesn't stop at \n. That
192 means we also should provide $results from sqimap_fread (by ref) to
193 te function and set $no_return to false. The $filter function for
194 quoted printable should handle unsetting of $results.
197 TODO 2: find out how we write to the output stream php://stdout. fwrite
198 doesn't work because 'php://stdout isn't a stream.
203 fputs ($imap_stream, "$sid FETCH $id BODY[$ent_id]\r\n");
206 $read = fgets ($imap_stream,8192);
209 // This could be bad -- if the section has sqimap_session_id() . ' OK'
210 // or similar, it will kill the download.
211 while (!ereg("^".$sid_s." (OK|BAD|NO)(.*)$", $read, $regs)) {
212 if (trim($read) == ')==') {
214 $read = fgets ($imap_stream,4096);
215 if (ereg("^".$sid." (OK|BAD|NO)(.*)$", $read, $regs)) {
218 echo decodeBody($read1, $encoding) .
219 decodeBody($read, $encoding);
222 echo decodeBody($read, $encoding);
224 $read = fgets ($imap_stream,4096);
231 /* -[ END MIME DECODING ]----------------------------------------------------------- */
233 /* This is here for debugging purposes. It will print out a list
234 * of all the entity IDs that are in the $message object.
236 function listEntities ($message) {
238 echo "<tt>" . $message->entity_id
. ' : ' . $message->type0
. '/' . $message->type1
. ' parent = '. $message->parent
->entity_id
. '<br>';
239 for ($i = 0; isset($message->entities
[$i]); $i++
) {
241 $msg = listEntities($message->entities
[$i]);
251 function getPriorityStr($priority) {
252 $priority_level = substr($priority,0,1);
254 switch($priority_level) {
255 /* Check for a higher then normal priority. */
258 $priority_string = _("High");
261 /* Check for a lower then normal priority. */
264 $priority_string = _("Low");
267 /* Check for a normal priority. */
270 $priority_level = '3';
271 $priority_string = _("Normal");
275 return $priority_string;
278 /* returns a $message object for a particular entity id */
279 function getEntity ($message, $ent_id) {
280 return $message->getEntity($ent_id);
284 * Extracted from strings.php 23/03/2002
287 function translateText(&$body, $wrap_at, $charset) {
288 global $where, $what; /* from searching */
289 global $color; /* color theme */
291 require_once(SM_PATH
. 'functions/url_parser.php');
293 $body_ary = explode("\n", $body);
294 for ($i=0; $i < count($body_ary); $i++
) {
295 $line = $body_ary[$i];
296 if (strlen($line) - 2 >= $wrap_at) {
297 sqWordWrap($line, $wrap_at);
299 $line = charset_decode($charset, $line);
300 $line = str_replace("\t", ' ', $line);
309 if ($line[$pos] == ' ') {
311 } else if (strpos($line, '>', $pos) === $pos) {
320 if (!isset($color[13])) {
321 $color[13] = '#800000';
323 $line = '<font color="' . $color[13] . '">' . $line . '</font>';
325 if (!isset($color[14])) {
326 $color[14] = '#FF0000';
328 $line = '<font color="' . $color[14] . '">' . $line . '</font>';
331 $body_ary[$i] = $line;
333 $body = '<pre>' . implode("\n", $body_ary) . '</pre>';
336 /* This returns a parsed string called $body. That string can then
337 * be displayed as the actual message in the HTML. It contains
338 * everything needed, including HTML Tags, Attachments at the
341 function formatBody($imap_stream, $message, $color, $wrap_at, $ent_num, $id, $mailbox='INBOX') {
342 /* This if statement checks for the entity to show as the
343 * primary message. To add more of them, just put them in the
344 * order that is their priority.
346 global $startMessage, $username, $key, $imapServerAddress, $imapPort,
347 $show_html_default, $sort, $has_unsafe_images, $passed_ent_id;
348 global $languages, $squirrelmail_language;
350 if( !sqgetGlobalVar('view_unsafe_images', $view_unsafe_images, SQ_GET
) ) {
351 $view_unsafe_images = false;
355 $urlmailbox = urlencode($mailbox);
356 $body_message = getEntity($message, $ent_num);
357 if (($body_message->header
->type0
== 'text') ||
358 ($body_message->header
->type0
== 'rfc822')) {
359 $body = mime_fetch_body ($imap_stream, $id, $ent_num);
360 $body = decodeBody($body, $body_message->header
->encoding
);
362 if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
363 function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
364 if (mb_detect_encoding($body) != 'ASCII') {
365 $body = $languages[$squirrelmail_language]['XTRA_CODE']('decode', $body);
368 $hookResults = do_hook("message_body", $body);
369 $body = $hookResults[1];
371 /* If there are other types that shouldn't be formatted, add
375 if ($body_message->header
->type1
== 'html') {
376 if ($show_html_default <> 1) {
377 $entity_conv = array(' ' => ' ',
384 $body = strtr($body, $entity_conv);
385 $body = strip_tags($body);
387 translateText($body, $wrap_at,
388 $body_message->header
->getParameter('charset'));
390 $body = magicHTML($body, $id, $message, $mailbox);
393 translateText($body, $wrap_at,
394 $body_message->header
->getParameter('charset'));
396 $link = 'read_body.php?passed_id=' . $id . '&ent_id='.$ent_num.
397 '&mailbox=' . $urlmailbox .'&sort=' . $sort .
398 '&startMessage=' . $startMessage . '&show_more=0';
399 if (isset($passed_ent_id)) {
400 $link .= '&passed_ent_id='.$passed_ent_id;
402 if ($view_unsafe_images) {
403 $text = _("Hide Unsafe Images");
405 if (isset($has_unsafe_images) && $has_unsafe_images) {
406 $link .= '&view_unsafe_images=1';
407 $text = _("View Unsafe Images");
412 $body .= '<center><small><a href="'.$link.'">'.$text.
413 '</a></small></center><br>' . "\n";
419 function formatAttachments($message, $exclude_id, $mailbox, $id) {
420 global $where, $what, $startMessage, $color;
421 static $ShownHTML = 0;
423 $att_ar = $message->getAttachments($exclude_id);
425 if (!count($att_ar)) return '';
429 $urlMailbox = urlencode($mailbox);
431 foreach ($att_ar as $att) {
432 $ent = $att->entity_id
;
433 $header = $att->header
;
434 $type0 = strtolower($header->type0
);
435 $type1 = strtolower($header->type1
);
437 $links['download link']['text'] = _("download");
438 $links['download link']['href'] = SM_PATH
.
439 "src/download.php?absolute_dl=true&passed_id=$id&mailbox=$urlMailbox&ent_id=$ent";
441 if ($type0 =='message' && $type1 == 'rfc822') {
442 $default_page = SM_PATH
. 'src/read_body.php';
443 $rfc822_header = $att->rfc822_header
;
444 $filename = $rfc822_header->subject
;
445 if (trim( $filename ) == '') {
446 $filename = 'untitled-[' . $ent . ']' ;
448 $from_o = $rfc822_header->from
;
449 if (is_object($from_o)) {
450 $from_name = decodeHeader($from_o->getAddress(false));
452 $from_name = _("Unknown sender");
454 $description = $from_name;
456 $default_page = SM_PATH
. 'src/download.php';
457 if (is_object($header->disposition
)) {
458 $filename = $header->disposition
->getProperty('filename');
459 if (trim($filename) == '') {
460 $name = decodeHeader($header->disposition
->getProperty('name'));
461 if (trim($name) == '') {
462 $name = $header->getParameter('name');
463 if(trim($name) == '') {
464 if (trim( $header->id
) == '') {
465 $filename = 'untitled-[' . $ent . ']' ;
467 $filename = 'cid: ' . $header->id
;
477 $filename = $header->getParameter('name');
478 if (!trim($filename)) {
479 if (trim( $header->id
) == '') {
480 $filename = 'untitled-[' . $ent . ']' ;
482 $filename = 'cid: ' . $header->id
;
486 if ($header->description
) {
487 $description = decodeHeader($header->description
);
493 $display_filename = $filename;
494 if (isset($passed_ent_id)) {
495 $passed_ent_id_link = '&passed_ent_id='.$passed_ent_id;
497 $passed_ent_id_link = '';
499 $defaultlink = $default_page . "?startMessage=$startMessage"
500 . "&passed_id=$id&mailbox=$urlMailbox"
501 . '&ent_id='.$ent.$passed_ent_id_link;
502 if ($where && $what) {
503 $defaultlink .= '&where='. urlencode($where).'&what='.urlencode($what);
505 /* This executes the attachment hook with a specific MIME-type.
506 * If that doesn't have results, it tries if there's a rule
507 * for a more generic type.
509 $hookresults = do_hook("attachment $type0/$type1", $links,
510 $startMessage, $id, $urlMailbox, $ent, $defaultlink,
511 $display_filename, $where, $what);
512 if(count($hookresults[1]) <= 1) {
513 $hookresults = do_hook("attachment $type0/*", $links,
514 $startMessage, $id, $urlMailbox, $ent, $defaultlink,
515 $display_filename, $where, $what);
518 $links = $hookresults[1];
519 $defaultlink = $hookresults[6];
521 $attachments .= '<TR><TD>' .
522 '<A HREF="'.$defaultlink.'">'.decodeHeader($display_filename).'</A> </TD>' .
523 '<TD><SMALL><b>' . show_readable_size($header->size
) .
524 '</b> </small></TD>' .
525 "<TD><SMALL>[ $type0/$type1 ] </SMALL></TD>" .
527 $attachments .= '<b>' . $description . '</b>';
528 $attachments .= '</SMALL></TD><TD><SMALL> ';
531 foreach ($links as $val) {
535 $attachments .= ' | ';
537 $attachments .= '<a href="' . $val['href'] . '">' . $val['text'] . '</a>';
540 $attachments .= "</TD></TR>\n";
542 $attachmentadd = do_hook_function('attachments_bottom',$attachments);
543 if ($attachmentadd != '')
544 $attachments = $attachmentadd;
548 function sqimap_base64_decode(&$string) {
549 $string = str_replace("\r\n", "\n", $string);
550 $string = base64_decode($string);
553 /* This function decodes the body depending on the encoding type. */
554 function decodeBody($body, $encoding) {
555 global $show_html_default;
557 $body = str_replace("\r\n", "\n", $body);
558 $encoding = strtolower($encoding);
560 $encoding_handler = do_hook_function('decode_body', $encoding);
563 // plugins get first shot at decoding the body
565 if (!empty($encoding_handler) && function_exists($encoding_handler)) {
566 $body = $encoding_handler('decode', $body);
568 } else if ($encoding == 'quoted-printable' ||
569 $encoding == 'quoted_printable') {
570 $body = quoted_printable_decode($body);
572 while (ereg("=\n", $body)) {
573 $body = ereg_replace ("=\n", '', $body);
576 } else if ($encoding == 'base64') {
577 $body = base64_decode($body);
580 // All other encodings are returned raw.
585 * This functions decode strings that is encoded according to
586 * RFC1522 (MIME Part Two: Message Header Extensions for Non-ASCII Text).
587 * Patched by Christian Schmidt <christian@ostenfeld.dk> 23/03/2002
589 function decodeHeader ($string, $utfencode=true,$htmlsave=true) {
590 global $languages, $squirrelmail_language;
591 if (is_array($string)) {
592 $string = implode("\n", $string);
595 if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
596 function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
597 $string = $languages[$squirrelmail_language]['XTRA_CODE']('decodeheader', $string);
598 // Do we need to return at this point?
605 $aString = explode(' ',$string);
607 foreach ($aString as $chunk) {
608 if ($encoded && $chunk === '') {
610 } elseif ($chunk === '') {
615 /* if encoded words are not separated by a linear-space-white we still catch them */
618 while ($match = preg_match('/^(.*)=\?([^?]*)\?(Q|B)\?([^?]*)\?=(.*)$/Ui',$chunk,$res)) {
619 /* if the last chunk isn't an encoded string then put back the space, otherwise don't */
620 if ($iLastMatch !== $j) {
630 $encoding = ucfirst($res[3]);
634 $replace = base64_decode($res[4]);
635 $ret .= charset_decode($res[2],$replace);
638 $replace = str_replace('_', ' ', $res[4]);
639 $replace = preg_replace('/=([0-9a-f]{2})/ie', 'chr(hexdec("\1"))',
641 /* Only encode into entities by default. Some places
642 * don't need the encoding, like the compose form.
645 $replace = charset_decode($res[2], $replace);
648 $replace = htmlspecialchars($replace);
660 if (!$encoded && $htmlsave) {
661 $ret .= htmlspecialchars($chunk);
680 * Encode a string according to RFC 1522 for use in headers if it
681 * contains 8-bit characters or anything that looks like it should
684 function encodeHeader ($string) {
685 global $default_charset, $languages, $squirrelmail_language;
687 if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
688 function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
689 return $languages[$squirrelmail_language]['XTRA_CODE']('encodeheader', $string);
691 if (strtolower($default_charset) == 'iso-8859-1') {
692 $string = str_replace("\240",' ',$string);
695 // Encode only if the string contains 8-bit characters or =?
696 $j = strlen($string);
697 $max_l = 75 - strlen($default_charset) - 7;
700 $iEncStart = $enc_init = false;
701 $cur_l = $iOffset = 0;
702 for($i = 0; $i < $j; ++
$i) {
711 if ($iEncStart === false) {
715 if ($cur_l > ($max_l-2)) {
716 /* if there is an stringpart that doesn't need encoding, add it */
717 $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset);
718 $aRet[] = "=?$default_charset?Q?$ret?=";
724 $ret .= sprintf("=%02X",ord($string{$i}));
729 if ($iEncStart !== false) {
730 $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset);
731 $aRet[] = "=?$default_charset?Q?$ret?=";
739 if ($iEncStart !== false) {
741 if ($cur_l > $max_l) {
742 $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset);
743 $aRet[] = "=?$default_charset?Q?$ret?=";
754 $k = ord($string{$i});
756 if ($iEncStart === false) {
757 // do not start encoding in the middle of a string, also take the rest of the word.
758 $sLeadString = substr($string,0,$i);
759 $aLeadString = explode(' ',$sLeadString);
760 $sToBeEncoded = array_pop($aLeadString);
761 $iEncStart = $i - strlen($sToBeEncoded);
762 $ret .= $sToBeEncoded;
763 $cur_l +
= strlen($sToBeEncoded);
766 /* first we add the encoded string that reached it's max size */
767 if ($cur_l > ($max_l-2)) {
768 $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset);
769 $aRet[] = "=?$default_charset?Q?$ret?= "; /* the next part is also encoded => separate by space */
776 $ret .= sprintf("=%02X", $k);
778 if ($iEncStart !== false) {
780 if ($cur_l > $max_l) {
781 $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset);
782 $aRet[] = "=?$default_charset?Q?$ret?=";
797 if ($iEncStart !== false) {
798 $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset);
799 $aRet[] = "=?$default_charset?Q?$ret?=";
801 $aRet[] = substr($string,$iOffset);
803 $string = implode('',$aRet);
808 /* This function trys to locate the entity_id of a specific mime element */
809 function find_ent_id($id, $message) {
810 for ($i = 0, $ret = ''; $ret == '' && $i < count($message->entities
); $i++
) {
811 if ($message->entities
[$i]->header
->type0
== 'multipart') {
812 $ret = find_ent_id($id, $message->entities
[$i]);
814 if (strcasecmp($message->entities
[$i]->header
->id
, $id) == 0) {
815 // if (sq_check_save_extension($message->entities[$i])) {
816 return $message->entities
[$i]->entity_id
;
824 function sq_check_save_extension($message) {
825 $filename = $message->getFilename();
826 $ext = substr($filename, strrpos($filename,'.')+
1);
827 $save_extensions = array('jpg','jpeg','gif','png','bmp');
828 return in_array($ext, $save_extensions);
833 ** HTMLFILTER ROUTINES
837 * This function is more or less a wrapper around stripslashes. Apparently
838 * Explorer is stupid enough to just remove the backslashes and then
839 * execute the content of the attribute as if nothing happened.
842 * @param attvalue The value of the attribute
843 * @return attvalue The value of the attribute stripslashed.
845 function sq_unbackslash($attvalue){
847 * Remove any backslashes. See if there are any first.
849 if (strstr($attvalue, '\\') !== false){
850 $attvalue = stripslashes($attvalue);
856 * Kill any tabs, newlines, or carriage returns. Our friends the
857 * makers of the browser with 95% market value decided that it'd
858 * be funny to make "java[tab]script" be just as good as "javascript".
860 * @param attvalue The attribute value before extraneous spaces removed.
861 * @return attvalue The attribute value after extraneous spaces removed.
863 function sq_unspace($attvalue){
864 if (strcspn($attvalue, "\t\r\n") != strlen($attvalue)){
865 $attvalue = str_replace(Array("\t", "\r", "\n"), Array('', '', ''),
872 * This function returns the final tag out of the tag name, an array
873 * of attributes, and the type of the tag. This function is called by
874 * sq_sanitize internally.
876 * @param $tagname the name of the tag.
877 * @param $attary the array of attributes and their values
878 * @param $tagtype The type of the tag (see in comments).
879 * @return a string with the final tag representation.
881 function sq_tagprint($tagname, $attary, $tagtype){
885 $fulltag = '</' . $tagname . '>';
887 $fulltag = '<' . $tagname;
888 if (is_array($attary) && sizeof($attary)){
890 while (list($attname, $attvalue) = each($attary)){
891 array_push($atts, "$attname=$attvalue");
893 $fulltag .= ' ' . join(" ", $atts);
904 * A small helper function to use with array_walk. Modifies a by-ref
905 * value and makes it lowercase.
907 * @param $val a value passed by-ref.
908 * @return void since it modifies a by-ref value.
910 function sq_casenormalize(&$val){
911 $val = strtolower($val);
915 * This function skips any whitespace from the current position within
916 * a string and to the next non-whitespace value.
918 * @param $body the string
919 * @param $offset the offset within the string where we should start
920 * looking for the next non-whitespace character.
921 * @return the location within the $body where the next
922 * non-whitespace char is located.
924 function sq_skipspace($body, $offset){
925 $me = 'sq_skipspace';
926 preg_match('/^(\s*)/s', substr($body, $offset), $matches);
927 if (sizeof($matches{1})){
928 $count = strlen($matches{1});
935 * This function looks for the next character within a string. It's
936 * really just a glorified "strpos", except it catches if failures
939 * @param $body The string to look for needle in.
940 * @param $offset Start looking from this position.
941 * @param $needle The character/string to look for.
942 * @return location of the next occurance of the needle, or
943 * strlen($body) if needle wasn't found.
945 function sq_findnxstr($body, $offset, $needle){
946 $me = 'sq_findnxstr';
947 $pos = strpos($body, $needle, $offset);
949 $pos = strlen($body);
955 * This function takes a PCRE-style regexp and tries to match it
958 * @param $body The string to look for needle in.
959 * @param $offset Start looking from here.
960 * @param $reg A PCRE-style regex to match.
961 * @return Returns a false if no matches found, or an array
962 * with the following members:
963 * - integer with the location of the match within $body
964 * - string with whatever content between offset and the match
965 * - string with whatever it is we matched
967 function sq_findnxreg($body, $offset, $reg){
968 $me = 'sq_findnxreg';
971 preg_match("%^(.*?)($reg)%si", substr($body, $offset), $matches);
972 if (!isset($matches{0}) ||
!$matches{0}){
975 $retarr{0} = $offset +
strlen($matches{1});
976 $retarr{1} = $matches{1};
977 $retarr{2} = $matches{2};
983 * This function looks for the next tag.
985 * @param $body String where to look for the next tag.
986 * @param $offset Start looking from here.
987 * @return false if no more tags exist in the body, or
988 * an array with the following members:
989 * - string with the name of the tag
990 * - array with attributes and their values
991 * - integer with tag type (1, 2, or 3)
992 * - integer where the tag starts (starting "<")
993 * - integer where the tag ends (ending ">")
994 * first three members will be false, if the tag is invalid.
996 function sq_getnxtag($body, $offset){
998 if ($offset > strlen($body)){
1001 $lt = sq_findnxstr($body, $offset, "<");
1002 if ($lt == strlen($body)){
1007 * blah blah <tag attribute="value">
1010 $pos = sq_skipspace($body, $lt+
1);
1011 if ($pos >= strlen($body)){
1012 return Array(false, false, false, $lt, strlen($body));
1015 * There are 3 kinds of tags:
1016 * 1. Opening tag, e.g.:
1018 * 2. Closing tag, e.g.:
1020 * 3. XHTML-style content-less tag, e.g.:
1024 switch (substr($body, $pos, 1)){
1031 * A comment or an SGML declaration.
1033 if (substr($body, $pos+
1, 2) == "--"){
1034 $gt = strpos($body, "-->", $pos);
1036 $gt = strlen($body);
1040 return Array(false, false, false, $lt, $gt);
1042 $gt = sq_findnxstr($body, $pos, ">");
1043 return Array(false, false, false, $lt, $gt);
1048 * Assume tagtype 1 for now. If it's type 3, we'll switch values
1058 * Look for next [\W-_], which will indicate the end of the tag name.
1060 $regary = sq_findnxreg($body, $pos, "[^\w\-_]");
1061 if ($regary == false){
1062 return Array(false, false, false, $lt, strlen($body));
1064 list($pos, $tagname, $match) = $regary;
1065 $tagname = strtolower($tagname);
1068 * $match can be either of these:
1069 * '>' indicating the end of the tag entirely.
1070 * '\s' indicating the end of the tag name.
1071 * '/' indicating that this is type-3 xhtml tag.
1073 * Whatever else we find there indicates an invalid tag.
1078 * This is an xhtml-style tag with a closing / at the
1079 * end, like so: <img src="blah"/>. Check if it's followed
1080 * by the closing bracket. If not, then this tag is invalid
1082 if (substr($body, $pos, 2) == "/>"){
1086 $gt = sq_findnxstr($body, $pos, ">");
1087 $retary = Array(false, false, false, $lt, $gt);
1091 return Array($tagname, false, $tagtype, $lt, $pos);
1095 * Check if it's whitespace
1097 if (!preg_match('/\s/', $match)){
1099 * This is an invalid tag! Look for the next closing ">".
1101 $gt = sq_findnxstr($body, $lt, ">");
1102 return Array(false, false, false, $lt, $gt);
1108 * At this point we're here:
1109 * <tagname attribute='blah'>
1112 * At this point we loop in order to find all attributes.
1118 while ($pos <= strlen($body)){
1119 $pos = sq_skipspace($body, $pos);
1120 if ($pos == strlen($body)){
1124 return Array(false, false, false, $lt, $pos);
1127 * See if we arrived at a ">" or "/>", which means that we reached
1128 * the end of the tag.
1131 if (preg_match("%^(\s*)(>|/>)%s", substr($body, $pos), $matches)) {
1135 $pos +
= strlen($matches{1});
1136 if ($matches{2} == "/>"){
1140 return Array($tagname, $attary, $tagtype, $lt, $pos);
1144 * There are several types of attributes, with optional
1145 * [:space:] between members.
1147 * attrname[:space:]=[:space:]'CDATA'
1149 * attrname[:space:]=[:space:]"CDATA"
1151 * attr[:space:]=[:space:]CDATA
1155 * We leave types 1 and 2 the same, type 3 we check for
1156 * '"' and convert to """ if needed, then wrap in
1157 * double quotes. Type 4 we convert into:
1160 $regary = sq_findnxreg($body, $pos, "[^:\w\-_]");
1161 if ($regary == false){
1163 * Looks like body ended before the end of tag.
1165 return Array(false, false, false, $lt, strlen($body));
1167 list($pos, $attname, $match) = $regary;
1168 $attname = strtolower($attname);
1170 * We arrived at the end of attribute name. Several things possible
1172 * '>' means the end of the tag and this is attribute type 4
1173 * '/' if followed by '>' means the same thing as above
1174 * '\s' means a lot of things -- look what it's followed by.
1175 * anything else means the attribute is invalid.
1180 * This is an xhtml-style tag with a closing / at the
1181 * end, like so: <img src="blah"/>. Check if it's followed
1182 * by the closing bracket. If not, then this tag is invalid
1184 if (substr($body, $pos, 2) == "/>"){
1188 $gt = sq_findnxstr($body, $pos, ">");
1189 $retary = Array(false, false, false, $lt, $gt);
1193 $attary{$attname} = '"yes"';
1194 return Array($tagname, $attary, $tagtype, $lt, $pos);
1198 * Skip whitespace and see what we arrive at.
1200 $pos = sq_skipspace($body, $pos);
1201 $char = substr($body, $pos, 1);
1203 * Two things are valid here:
1204 * '=' means this is attribute type 1 2 or 3.
1205 * \w means this was attribute type 4.
1206 * anything else we ignore and re-loop. End of tag and
1207 * invalid stuff will be caught by our checks at the beginning
1212 $pos = sq_skipspace($body, $pos);
1214 * Here are 3 possibilities:
1215 * "'" attribute type 1
1216 * '"' attribute type 2
1217 * everything else is the content of tag type 3
1219 $quot = substr($body, $pos, 1);
1221 $regary = sq_findnxreg($body, $pos+
1, "\'");
1222 if ($regary == false){
1223 return Array(false, false, false, $lt, strlen($body));
1225 list($pos, $attval, $match) = $regary;
1227 $attary{$attname} = "'" . $attval . "'";
1228 } else if ($quot == '"'){
1229 $regary = sq_findnxreg($body, $pos+
1, '\"');
1230 if ($regary == false){
1231 return Array(false, false, false, $lt, strlen($body));
1233 list($pos, $attval, $match) = $regary;
1235 $attary{$attname} = '"' . $attval . '"';
1238 * These are hateful. Look for \s, or >.
1240 $regary = sq_findnxreg($body, $pos, "[\s>]");
1241 if ($regary == false){
1242 return Array(false, false, false, $lt, strlen($body));
1244 list($pos, $attval, $match) = $regary;
1246 * If it's ">" it will be caught at the top.
1248 $attval = preg_replace("/\"/s", """, $attval);
1249 $attary{$attname} = '"' . $attval . '"';
1251 } else if (preg_match("|[\w/>]|", $char)) {
1253 * That was attribute type 4.
1255 $attary{$attname} = '"yes"';
1258 * An illegal character. Find next '>' and return.
1260 $gt = sq_findnxstr($body, $pos, ">");
1261 return Array(false, false, false, $lt, $gt);
1267 * The fact that we got here indicates that the tag end was never
1268 * found. Return invalid tag indication so it gets stripped.
1270 return Array(false, false, false, $lt, strlen($body));
1274 * This function checks attribute values for entity-encoded values
1275 * and returns them translated into 8-bit strings so we can run
1278 * @param $attvalue A string to run entity check against.
1279 * @return Translated value.
1281 function sq_deent($attvalue){
1284 * See if we have to run the checks first. All entities must start
1287 if (strpos($attvalue, "&") === false){
1291 * Check named entities first.
1293 $trans = get_html_translation_table(HTML_ENTITIES
);
1295 * Leave " in, as it can mess us up.
1297 $trans = array_flip($trans);
1298 unset($trans{"""});
1299 while (list($ent, $val) = each($trans)){
1300 $attvalue = preg_replace("/$ent*(\W)/si", "$val\\1", $attvalue);
1303 * Now translate numbered entities from 1 to 255 if needed.
1305 if (strpos($attvalue, "#") !== false){
1306 $omit = Array(34, 39);
1307 for ($asc=1; $asc<256; $asc++
){
1308 if (!in_array($asc, $omit)){
1310 $attvalue = preg_replace("/\�*$asc;*(\D)/si", "$chr\\1",
1312 $attvalue = preg_replace("/\�*".dechex($asc).";*(\W)/si",
1313 "$chr\\1", $attvalue);
1321 * This function runs various checks against the attributes.
1323 * @param $tagname String with the name of the tag.
1324 * @param $attary Array with all tag attributes.
1325 * @param $rm_attnames See description for sq_sanitize
1326 * @param $bad_attvals See description for sq_sanitize
1327 * @param $add_attr_to_tag See description for sq_sanitize
1328 * @param $message message object
1329 * @param $id message id
1330 * @return Array with modified attributes.
1332 function sq_fixatts($tagname,
1342 while (list($attname, $attvalue) = each($attary)){
1344 * See if this attribute should be removed.
1346 foreach ($rm_attnames as $matchtag=>$matchattrs){
1347 if (preg_match($matchtag, $tagname)){
1348 foreach ($matchattrs as $matchattr){
1349 if (preg_match($matchattr, $attname)){
1350 unset($attary{$attname});
1357 * Remove any backslashes, entities, and extraneous whitespace.
1359 $attvalue = sq_unbackslash($attvalue);
1360 $attvalue = sq_deent($attvalue);
1361 $attvalue = sq_unspace($attvalue);
1364 * Now let's run checks on the attvalues.
1365 * I don't expect anyone to comprehend this. If you do,
1366 * get in touch with me so I can drive to where you live and
1367 * shake your hand personally. :)
1369 foreach ($bad_attvals as $matchtag=>$matchattrs){
1370 if (preg_match($matchtag, $tagname)){
1371 foreach ($matchattrs as $matchattr=>$valary){
1372 if (preg_match($matchattr, $attname)){
1374 * There are two arrays in valary.
1376 * Second one is replacements
1378 list($valmatch, $valrepl) = $valary;
1380 preg_replace($valmatch, $valrepl, $attvalue);
1381 if ($newvalue != $attvalue){
1382 $attary{$attname} = $newvalue;
1389 * Turn cid: urls into http-friendly ones.
1391 if (preg_match("/^[\'\"]\s*cid:/si", $attvalue)){
1392 $attary{$attname} = sq_cid2http($message, $id, $attvalue, $mailbox);
1396 * See if we need to append any attributes to this tag.
1398 foreach ($add_attr_to_tag as $matchtag=>$addattary){
1399 if (preg_match($matchtag, $tagname)){
1400 $attary = array_merge($attary, $addattary);
1407 * This function edits the style definition to make them friendly and
1408 * usable in squirrelmail.
1410 * @param $message the message object
1411 * @param $id the message id
1412 * @param $content a string with whatever is between <style> and </style>
1413 * @return a string with edited content.
1415 function sq_fixstyle($body, $pos, $message, $id){
1416 global $view_unsafe_images;
1417 $me = 'sq_fixstyle';
1418 $ret = sq_findnxreg($body, $pos, '</\s*style\s*>');
1420 return array(FALSE, strlen($body));
1422 $newpos = $ret[0] +
strlen($ret[2]);
1425 * First look for general BODY style declaration, which would be
1427 * body {background: blah-blah}
1428 * and change it to .bodyclass so we can just assign it to a <div>
1430 $content = preg_replace("|body(\s*\{.*?\})|si", ".bodyclass\\1", $content);
1431 $secremoveimg = '../images/' . _("sec_remove_eng.png");
1433 * Fix url('blah') declarations.
1435 $content = preg_replace("|url\s*\(\s*([\'\"])\s*\S+script\s*:.*?([\'\"])\s*\)|si",
1436 "url(\\1$secremoveimg\\2)", $content);
1438 * Fix url('https*://.*) declarations but only if $view_unsafe_images
1441 if (!$view_unsafe_images){
1442 $content = preg_replace("|url\s*\(\s*([\'\"])\s*https*:.*?([\'\"])\s*\)|si",
1443 "url(\\1$secremoveimg\\2)", $content);
1447 * Fix urls that refer to cid:
1449 while (preg_match("|url\s*\(\s*([\'\"]\s*cid:.*?[\'\"])\s*\)|si",
1450 $content, $matches)){
1451 $cidurl = $matches{1};
1452 $httpurl = sq_cid2http($message, $id, $cidurl);
1453 $content = preg_replace("|url\s*\(\s*$cidurl\s*\)|si",
1454 "url($httpurl)", $content);
1458 * Fix stupid css declarations which lead to vulnerabilities
1461 $match = Array('/expression/i',
1464 '/include-source/i');
1465 $replace = Array('idiocy', 'idiocy', 'idiocy', 'idiocy');
1466 $content = preg_replace($match, $replace, $content);
1467 return array($content, $newpos);
1471 * This function converts cid: url's into the ones that can be viewed in
1474 * @param $message the message object
1475 * @param $id the message id
1476 * @param $cidurl the cid: url.
1477 * @return a string with a http-friendly url
1479 function sq_cid2http($message, $id, $cidurl, $mailbox){
1481 * Get rid of quotes.
1483 $quotchar = substr($cidurl, 0, 1);
1484 if ($quotchar == '"' ||
$quotchar == "'"){
1485 $cidurl = str_replace($quotchar, "", $cidurl);
1489 $cidurl = substr(trim($cidurl), 4);
1490 $linkurl = find_ent_id($cidurl, $message);
1491 /* in case of non-save cid links $httpurl should be replaced by a sort of
1492 unsave link image */
1495 $httpurl = $quotchar . SM_PATH
. 'src/download.php?absolute_dl=true&' .
1496 "passed_id=$id&mailbox=" . urlencode($mailbox) .
1497 '&ent_id=' . $linkurl . $quotchar;
1503 * This function changes the <body> tag into a <div> tag since we
1504 * can't really have a body-within-body.
1506 * @param $attary an array of attributes and values of <body>
1507 * @param $mailbox mailbox we're currently reading (for cid2http)
1508 * @param $message current message (for cid2http)
1509 * @param $id current message id (for cid2http)
1510 * @return a modified array of attributes to be set for <div>
1512 function sq_body2div($attary, $mailbox, $message, $id){
1513 $me = 'sq_body2div';
1514 $divattary = Array('class' => "'bodyclass'");
1515 $bgcolor = '#ffffff';
1517 $has_bgc_stl = $has_txt_stl = false;
1519 if (is_array($attary) && sizeof($attary) > 0){
1520 foreach ($attary as $attname=>$attvalue){
1521 $quotchar = substr($attvalue, 0, 1);
1522 $attvalue = str_replace($quotchar, "", $attvalue);
1525 $attvalue = sq_cid2http($message, $id,
1526 $attvalue, $mailbox);
1527 $styledef .= "background-image: url('$attvalue'); ";
1530 $has_bgc_stl = true;
1531 $styledef .= "background-color: $attvalue; ";
1534 $has_txt_stl = true;
1535 $styledef .= "color: $attvalue; ";
1539 // Outlook defines a white bgcolor and no text color. This can lead to
1540 // white text on a white bg with certain themes.
1541 if ($has_bgc_stl && !$has_txt_stl) {
1542 $styledef .= "color: $text; ";
1544 if (strlen($styledef) > 0){
1545 $divattary{"style"} = "\"$styledef\"";
1552 * This is the main function and the one you should actually be calling.
1553 * There are several variables you should be aware of an which need
1554 * special description.
1556 * Since the description is quite lengthy, see it here:
1557 * http://www.mricon.com/html/phpfilter.html
1559 * @param $body the string with HTML you wish to filter
1560 * @param $tag_list see description above
1561 * @param $rm_tags_with_content see description above
1562 * @param $self_closing_tags see description above
1563 * @param $force_tag_closing see description above
1564 * @param $rm_attnames see description above
1565 * @param $bad_attvals see description above
1566 * @param $add_attr_to_tag see description above
1567 * @param $message message object
1568 * @param $id message id
1569 * @return sanitized html safe to show on your pages.
1571 function sq_sanitize($body,
1573 $rm_tags_with_content,
1583 $me = 'sq_sanitize';
1584 $rm_tags = array_shift($tag_list);
1586 * Normalize rm_tags and rm_tags_with_content.
1588 @array_walk
($tag_list, 'sq_casenormalize');
1589 @array_walk
($rm_tags_with_content, 'sq_casenormalize');
1590 @array_walk
($self_closing_tags, 'sq_casenormalize');
1592 * See if tag_list is of tags to remove or tags to allow.
1593 * false means remove these tags
1594 * true means allow these tags
1597 $open_tags = Array();
1598 $trusted = "\n<!-- begin sanitized html -->\n";
1599 $skip_content = false;
1601 * Take care of netscape's stupid javascript entities like
1604 $body = preg_replace("/&(\{.*?\};)/si", "&\\1", $body);
1606 while (($curtag = sq_getnxtag($body, $curpos)) != FALSE){
1607 list($tagname, $attary, $tagtype, $lt, $gt) = $curtag;
1608 $free_content = substr($body, $curpos, $lt-$curpos);
1610 * Take care of <style>
1612 if ($tagname == "style" && $tagtype == 1){
1613 list($free_content, $curpos) =
1614 sq_fixstyle($body, $gt+
1, $message, $id);
1615 if ($free_content != FALSE){
1616 $trusted .= sq_tagprint($tagname, $attary, $tagtype);
1617 $trusted .= $free_content;
1618 $trusted .= sq_tagprint($tagname, false, 2);
1622 if ($skip_content == false){
1623 $trusted .= $free_content;
1625 if ($tagname != FALSE){
1627 if ($skip_content == $tagname){
1629 * Got to the end of tag we needed to remove.
1632 $skip_content = false;
1634 if ($skip_content == false){
1635 if ($tagname == "body"){
1638 if (isset($open_tags{$tagname}) &&
1639 $open_tags{$tagname} > 0){
1640 $open_tags{$tagname}--;
1648 * $rm_tags_with_content
1650 if ($skip_content == false){
1652 * See if this is a self-closing type and change
1653 * tagtype appropriately.
1656 && in_array($tagname, $self_closing_tags)){
1660 * See if we should skip this tag and any content
1663 if ($tagtype == 1 &&
1664 in_array($tagname, $rm_tags_with_content)){
1665 $skip_content = $tagname;
1667 if (($rm_tags == false
1668 && in_array($tagname, $tag_list)) ||
1669 ($rm_tags == true &&
1670 !in_array($tagname, $tag_list))){
1674 * Convert body into div.
1676 if ($tagname == "body"){
1678 $attary = sq_body2div($attary, $mailbox,
1682 if (isset($open_tags{$tagname})){
1683 $open_tags{$tagname}++
;
1685 $open_tags{$tagname}=1;
1689 * This is where we run other checks.
1691 if (is_array($attary) && sizeof($attary) > 0){
1692 $attary = sq_fixatts($tagname,
1706 if ($tagname != false && $skip_content == false){
1707 $trusted .= sq_tagprint($tagname, $attary, $tagtype);
1712 $trusted .= substr($body, $curpos, strlen($body)-$curpos);
1713 if ($force_tag_closing == true){
1714 foreach ($open_tags as $tagname=>$opentimes){
1715 while ($opentimes > 0){
1716 $trusted .= '</' . $tagname . '>';
1722 $trusted .= "<!-- end sanitized html -->\n";
1727 * This is a wrapper function to call html sanitizing routines.
1729 * @param $body the body of the message
1730 * @param $id the id of the message
1731 * @return a string with html safe to display in the browser.
1733 function magicHTML($body, $id, $message, $mailbox = 'INBOX') {
1734 global $attachment_common_show_images, $view_unsafe_images,
1737 * Don't display attached images in HTML mode.
1739 $attachment_common_show_images = false;
1754 $rm_tags_with_content = Array(
1763 $self_closing_tags = Array(
1770 $force_tag_closing = true;
1772 $rm_attnames = Array(
1783 $secremoveimg = "../images/" . _("sec_remove_eng.png");
1784 $bad_attvals = Array(
1787 "/^src|background/i" =>
1790 "/^([\'\"])\s*\S+script\s*:.*([\'\"])/si",
1791 "/^([\'\"])\s*mocha\s*:*.*([\'\"])/si",
1792 "/^([\'\"])\s*about\s*:.*([\'\"])/si"
1795 "\\1$secremoveimg\\2",
1796 "\\1$secremoveimg\\2",
1797 "\\1$secremoveimg\\2",
1798 "\\1$secremoveimg\\2"
1801 "/^href|action/i" =>
1804 "/^([\'\"])\s*\S+script\s*:.*([\'\"])/si",
1805 "/^([\'\"])\s*mocha\s*:*.*([\'\"])/si",
1806 "/^([\'\"])\s*about\s*:.*([\'\"])/si"
1821 "/include-source/i",
1822 "/url\s*\(\s*([\'\"])\s*\S+script\s*:.*([\'\"])\s*\)/si",
1823 "/url\s*\(\s*([\'\"])\s*mocha\s*:.*([\'\"])\s*\)/si",
1824 "/url\s*\(\s*([\'\"])\s*about\s*:.*([\'\"])\s*\)/si"
1839 if( !sqgetGlobalVar('view_unsafe_images', $view_unsafe_images, SQ_GET
) ) {
1840 $view_unsafe_images = false;
1842 if (!$view_unsafe_images){
1844 * Remove any references to http/https if view_unsafe_images set
1847 array_push($bad_attvals{'/.*/'}{'/^src|background/i'}[0],
1848 '/^([\'\"])\s*https*:.*([\'\"])/si');
1849 array_push($bad_attvals{'/.*/'}{'/^src|background/i'}[1],
1850 "\\1$secremoveimg\\1");
1851 array_push($bad_attvals{'/.*/'}{'/^style/i'}[0],
1852 '/url\(([\'\"])\s*https*:.*([\'\"])\)/si');
1853 array_push($bad_attvals{'/.*/'}{'/^style/i'}[1],
1854 "url(\\1$secremoveimg\\1)");
1857 $add_attr_to_tag = Array(
1859 Array('target'=>'"_new"',
1860 'title'=>'"'._("This external link will open in a new window").'"'
1863 $trusted = sq_sanitize($body,
1865 $rm_tags_with_content,
1875 if (preg_match("|$secremoveimg|i", $trusted)){
1876 $has_unsafe_images = true;
1882 * function SendDownloadHeaders - send file to the browser
1884 * Original Source: SM core src/download.php
1885 * moved here to make it available to other code, and separate
1886 * front end from back end functionality.
1888 * @param string $type0 first half of mime type
1889 * @param string $type1 second half of mime type
1890 * @param string $filename filename to tell the browser for downloaded file
1891 * @param boolean $force whether to force the download dialog to pop
1894 function SendDownloadHeaders($type0, $type1, $filename, $force) {
1895 global $languages, $squirrelmail_language;
1898 sqgetGlobalVar('HTTP_USER_AGENT', $HTTP_USER_AGENT, SQ_SERVER
);
1900 if (strstr($HTTP_USER_AGENT, 'compatible; MSIE ') !== false &&
1901 strstr($HTTP_USER_AGENT, 'Opera') === false) {
1905 if (strstr($HTTP_USER_AGENT, 'compatible; MSIE 6') !== false &&
1906 strstr($HTTP_USER_AGENT, 'Opera') === false) {
1910 if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
1911 function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
1913 $languages[$squirrelmail_language]['XTRA_CODE']('downloadfilename', $filename, $HTTP_USER_AGENT);
1915 $filename = ereg_replace('[\\/:\*\?"<>\|;]', '_', str_replace(' ', ' ', $filename));
1918 // A Pox on Microsoft and it's Office!
1920 // Try to show in browser window
1921 header("Content-Disposition: inline; filename=\"$filename\"");
1922 header("Content-Type: $type0/$type1; name=\"$filename\"");
1924 // Try to pop up the "save as" box
1925 // IE makes this hard. It pops up 2 save boxes, or none.
1926 // http://support.microsoft.com/support/kb/articles/Q238/5/88.ASP
1927 // But, accordint to Microsoft, it is "RFC compliant but doesn't
1928 // take into account some deviations that allowed within the
1929 // specification." Doesn't that mean RFC non-compliant?
1930 // http://support.microsoft.com/support/kb/articles/Q258/4/52.ASP
1932 // The best thing you can do for IE is to upgrade to the latest
1934 if ($isIE && !$isIE6) {
1935 // http://support.microsoft.com/support/kb/articles/Q182/3/15.asp
1936 // Do not have quotes around filename, but that applied to
1937 // "attachment"... does it apply to inline too?
1939 // This combination seems to work mostly. IE 5.5 SP 1 has
1940 // known issues (see the Microsoft Knowledge Base)
1941 header("Content-Disposition: inline; filename=$filename");
1942 // This works for most types, but doesn't work with Word files
1943 header("Content-Type: application/download; name=\"$filename\"");
1945 // These are spares, just in case. :-)
1946 //header("Content-Type: $type0/$type1; name=\"$filename\"");
1947 //header("Content-Type: application/x-msdownload; name=\"$filename\"");
1948 //header("Content-Type: application/octet-stream; name=\"$filename\"");
1950 header("Content-Disposition: attachment; filename=\"$filename\"");
1951 // application/octet-stream forces download for Netscape
1952 header("Content-Type: application/octet-stream; name=\"$filename\"");