a9c22b7ae53617da8a11f5a4ced820e98fe8bc03
[squirrelmail.git] / functions / mime.php
1 <?php
2 /** mime.php
3 **
4 ** This contains the functions necessary to detect and decode MIME
5 ** messages.
6 **
7 ** $Id$
8 **/
9
10 if (defined('mime_php'))
11 return;
12 define('mime_php', true);
13
14 global $debug_mime;
15 $debug_mime = false;
16
17 include "../functions/imap.php";
18
19 /** Setting up the objects that have the structure for the message **/
20
21 class msg_header {
22 /** msg_header contains generic variables for values that **/
23 /** could be in a header. **/
24
25 var $type0 = '', $type1 = '', $boundary = '', $charset = '';
26 var $encoding = '', $size = 0, $to = array(), $from = '', $date = '';
27 var $cc = array(), $bcc = array(), $reply_to = '', $subject = '';
28 var $id = 0, $mailbox = '', $description = '', $filename = '';
29 var $entity_id = 0, $message_id = 0, $name = '';
30 }
31
32 class message {
33 /** message is the object that contains messages. It is a recursive
34 object in that through the $entities variable, it can contain
35 more objects of type message. See documentation in mime.txt for
36 a better description of how this works.
37 **/
38 var $header = '';
39 var $entities = array();
40
41 function addEntity ($msg) {
42 $this->entities[] = $msg;
43 }
44 }
45
46
47
48 /* --------------------------------------------------------------------------------- */
49 /* MIME DECODING */
50 /* --------------------------------------------------------------------------------- */
51
52 // This function gets the structure of a message and stores it in the "message" class.
53 // It will return this object for use with all relevant header information and
54 // fully parsed into the standard "message" object format.
55 function mime_structure ($imap_stream, $header) {
56 global $debug_mime;
57 sqimap_messages_flag ($imap_stream, $header->id, $header->id, "Seen");
58
59 $id = $header->id;
60 fputs ($imap_stream, "a001 FETCH $id BODYSTRUCTURE\r\n");
61 //
62 // This should use sqimap_read_data instead of reading it itself
63 //
64 $read = fgets ($imap_stream, 10000);
65 $response = substr($read, 0, 4);
66 $bodystructure = "";
67 while ($response != "a001") {
68 $bodystructure .= $read;
69 $read = fgets ($imap_stream, 10000);
70 $response = substr($read, 0, 4);
71 }
72 $read = $bodystructure;
73
74 if ($debug_mime) echo "<tt>$read</tt><br><br>\n";
75 // isolate the body structure and remove beginning and end parenthesis
76 $read = trim(substr ($read, strpos(strtolower($read), "bodystructure") + 13));
77 $read = trim(substr ($read, 0, -1));
78 $end = mime_match_parenthesis(0, $read);
79 while ($end == strlen($read)-1) {
80 $read = trim(substr ($read, 0, -1));
81 $read = trim(substr ($read, 1));
82 $end = mime_match_parenthesis(0, $read);
83 }
84
85 if ($debug_mime) echo "<tt>$read</tt><br><br>\n";
86
87 $msg = mime_parse_structure ($read, 0);
88 $msg->header = $header;
89 return $msg;
90 }
91
92 // this starts the parsing of a particular structure. It is called recursively,
93 // so it can be passed different structures. It returns an object of type
94 // $message.
95 // First, it checks to see if it is a multipart message. If it is, then it
96 // handles that as it sees is necessary. If it is just a regular entity,
97 // then it parses it and adds the necessary header information (by calling out
98 // to mime_get_elements()
99 function mime_parse_structure ($structure, $ent_id) {
100 global $debug_mime;
101 if ($debug_mime) echo "<font color=008800><tt>START: mime_parse_structure()</tt></font><br>\n";
102 $msg = new message();
103 if (substr($structure, 0, 1) == "(") {
104 $ent_id = mime_new_element_level($ent_id);
105 $start = $end = -1;
106 if ($debug_mime) echo "<br><font color=0000aa><tt>$structure</tt></font><br>";
107 do {
108 if ($debug_mime) echo "<font color=008800><tt>Found entity...</tt></font><br>";
109 $start = $end+1;
110 $end = mime_match_parenthesis ($start, $structure);
111
112 $element = substr($structure, $start+1, ($end - $start)-1);
113 $ent_id = mime_increment_id ($ent_id);
114 $newmsg = mime_parse_structure ($element, $ent_id);
115 $msg->addEntity ($newmsg);
116 } while (substr($structure, $end+1, 1) == "(");
117 } else {
118 // parse the elements
119 if ($debug_mime) echo "<br><font color=0000aa><tt>$structure</tt></font><br>";
120 $msg = mime_get_element ($structure, $msg, $ent_id);
121 if ($debug_mime) echo "<br>";
122 }
123 if ($debug_mime) echo "<font color=008800><tt>&nbsp;&nbsp;END: mime_parse_structure()</tt></font><br>";
124 return $msg;
125 }
126
127 // Increments the element ID. An element id can look like any of
128 // the following: 1, 1.2, 4.3.2.4.1, etc. This function increments
129 // the last number of the element id, changing 1.2 to 1.3.
130 function mime_increment_id ($id) {
131 global $debug_mime;
132 if (strpos($id, ".")) {
133 $first = substr($id, 0, strrpos($id, "."));
134 $last = substr($id, strrpos($id, ".")+1);
135 $last++;
136 $new = $first . "." .$last;
137 } else {
138 $new = $id + 1;
139 }
140 if ($debug_mime) echo "<b>INCREMENT: $new</b><br>";
141 return $new;
142 }
143
144 // See comment for mime_increment_id().
145 // This adds another level on to the entity_id changing 1.3 to 1.3.0
146 // NOTE: 1.3.0 is not a valid element ID. It MUST be incremented
147 // before it can be used. I left it this way so as not to have
148 // to make a special case if it is the first entity_id. It
149 // always increments it, and that works fine.
150 function mime_new_element_level ($id) {
151 if (!$id) $id = 0;
152 else $id = $id . ".0";
153
154 return $id;
155 }
156
157 function mime_get_element (&$structure, $msg, $ent_id) {
158 global $debug_mime;
159 $elem_num = 1;
160 $msg->header = new msg_header();
161 $msg->header->entity_id = $ent_id;
162 $properties = array();
163
164 while (strlen($structure) > 0) {
165 $structure = trim($structure);
166 $char = substr($structure, 0, 1);
167
168 if (strtolower(substr($structure, 0, 3)) == "nil") {
169 $text = "";
170 $structure = substr($structure, 3);
171 } else if ($char == "\"") {
172 // loop through until we find the matching quote, and return that as a string
173 $pos = 1;
174 $char = substr($structure, $pos, 1);
175 $text = "";
176 while ($char != "\"" && $pos < strlen($structure)) {
177 $text .= $char;
178 $pos++;
179 $char = substr($structure, $pos, 1);
180 }
181 $structure = substr($structure, strlen($text) + 2);
182 } else if ($char == "(") {
183 // comment me
184 $end = mime_match_parenthesis (0, $structure);
185 $sub = substr($structure, 1, $end-1);
186 $properties = mime_get_props($properties, $sub);
187 $structure = substr($structure, strlen($sub) + 2);
188 } else {
189 // loop through until we find a space or an end parenthesis
190 $pos = 0;
191 $char = substr($structure, $pos, 1);
192 $text = "";
193 while ($char != " " && $char != ")" && $pos < strlen($structure)) {
194 $text .= $char;
195 $pos++;
196 $char = substr($structure, $pos, 1);
197 }
198 $structure = substr($structure, strlen($text));
199 }
200 if ($debug_mime) echo "<tt>$elem_num : $text</tt><br>";
201
202 // This is where all the text parts get put into the header
203 switch ($elem_num) {
204 case 1:
205 $msg->header->type0 = strtolower($text);
206 if ($debug_mime) echo "<tt>type0 = ".strtolower($text)."</tt><br>";
207 break;
208 case 2:
209 $msg->header->type1 = strtolower($text);
210 if ($debug_mime) echo "<tt>type1 = ".strtolower($text)."</tt><br>";
211 break;
212 case 5:
213 $msg->header->description = $text;
214 if ($debug_mime) echo "<tt>description = $text</tt><br>";
215 break;
216 case 6:
217 $msg->header->encoding = strtolower($text);
218 if ($debug_mime) echo "<tt>encoding = ".strtolower($text)."</tt><br>";
219 break;
220 case 7:
221 $msg->header->size = $text;
222 if ($debug_mime) echo "<tt>size = $text</tt><br>";
223 break;
224 default:
225 if ($msg->header->type0 == "text" && $elem_num == 8) {
226 // This is a plain text message, so lets get the number of lines
227 // that it contains.
228 $msg->header->num_lines = $text;
229 if ($debug_mime) echo "<tt>num_lines = $text</tt><br>";
230
231 } else if ($msg->header->type0 == "message" && $msg->header->type1 == "rfc822" && $elem_num == 8) {
232 // This is an encapsulated message, so lets start all over again and
233 // parse this message adding it on to the existing one.
234 $structure = trim($structure);
235 if (substr($structure, 0, 1) == "(") {
236 $e = mime_match_parenthesis (0, $structure);
237 $structure = substr($structure, 0, $e);
238 $structure = substr($structure, 1);
239 $m = mime_parse_structure($structure, $msg->header->entity_id);
240
241 // the following conditional is there to correct a bug that wasn't
242 // incrementing the entity IDs correctly because of the special case
243 // that message/rfc822 is. This fixes it fine.
244 if (substr($structure, 1, 1) != "(")
245 $m->header->entity_id = mime_increment_id(mime_new_element_level($ent_id));
246
247 // Now we'll go through and reformat the results.
248 if ($m->entities) {
249 for ($i=0; $i < count($m->entities); $i++) {
250 $msg->addEntity($m->entities[$i]);
251 }
252 } else {
253 $msg->addEntity($m);
254 }
255 $structure = "";
256 }
257 }
258 break;
259 }
260 $elem_num++;
261 $text = "";
262 }
263 // loop through the additional properties and put those in the various headers
264 if ($msg->header->type0 != "message") {
265 for ($i=0; $i < count($properties); $i++) {
266 $msg->header->{$properties[$i]["name"]} = $properties[$i]["value"];
267 if ($debug_mime) echo "<tt>".$properties[$i]["name"]." = " . $properties[$i]["value"] . "</tt><br>";
268 }
269 }
270
271 return $msg;
272 }
273
274 // I did most of the MIME stuff yesterday (June 20, 2000), but I couldn't
275 // figure out how to do this part, so I decided to go to bed. I woke up
276 // in the morning and had a flash of insight. I went to the white-board
277 // and scribbled it out, then spent a bit programming it, and this is the
278 // result. Nothing complicated, but I think my brain was fried yesterday.
279 // Funny how that happens some times.
280 //
281 // This gets properties in a nested parenthesisized list. For example,
282 // this would get passed something like: ("attachment" ("filename" "luke.tar.gz"))
283 // This returns an array called $props with all paired up properties.
284 // It ignores the "attachment" for now, maybe that should change later
285 // down the road. In this case, what is returned is:
286 // $props[0]["name"] = "filename";
287 // $props[0]["value"] = "luke.tar.gz";
288 function mime_get_props ($props, $structure) {
289 global $debug_mime;
290 while (strlen($structure) > 0) {
291 $structure = trim($structure);
292 $char = substr($structure, 0, 1);
293
294 if ($char == "\"") {
295 $pos = 1;
296 $char = substr($structure, $pos, 1);
297 $tmp = "";
298 while ($char != "\"" && $pos < strlen($structure)) {
299 $tmp .= $char;
300 $pos++;
301 $char = substr($structure, $pos, 1);
302 }
303 $structure = trim(substr($structure, strlen($tmp) + 2));
304 $char = substr($structure, 0, 1);
305
306 if ($char == "\"") {
307 $pos = 1;
308 $char = substr($structure, $pos, 1);
309 $value = "";
310 while ($char != "\"" && $pos < strlen($structure)) {
311 $value .= $char;
312 $pos++;
313 $char = substr($structure, $pos, 1);
314 }
315 $structure = trim(substr($structure, strlen($tmp) + 2));
316
317 $k = count($props);
318 $props[$k]["name"] = strtolower($tmp);
319 $props[$k]["value"] = $value;
320 } else if ($char == "(") {
321 $end = mime_match_parenthesis (0, $structure);
322 $sub = substr($structure, 1, $end-1);
323 if (! isset($props))
324 $props = array();
325 $props = mime_get_props($props, $sub);
326 $structure = substr($structure, strlen($sub) + 2);
327 }
328 return $props;
329 } else if ($char == "(") {
330 $end = mime_match_parenthesis (0, $structure);
331 $sub = substr($structure, 1, $end-1);
332 $props = mime_get_props($props, $sub);
333 $structure = substr($structure, strlen($sub) + 2);
334 return $props;
335 } else {
336 return $props;
337 }
338 }
339 }
340
341 // Matches parenthesis. It will return the position of the matching
342 // parenthesis in $structure. For instance, if $structure was:
343 // ("text" "plain" ("val1name", "1") nil ... )
344 // x x
345 // then this would return 42 to match up those two.
346 function mime_match_parenthesis ($pos, $structure) {
347 $char = substr($structure, $pos, 1);
348
349 // ignore all extra characters
350 // If inside of a string, skip string -- Boundary IDs and other
351 // things can have ) in them.
352 if ($char != '(')
353 return strlen($structure);
354 while ($pos < strlen($structure)) {
355 $pos++;
356 $char = substr($structure, $pos, 1);
357 if ($char == ")") {
358 return $pos;
359 } else if ($char == '"') {
360 $pos ++;
361 while (substr($structure, $pos, 1) != '"' &&
362 $pos < strlen($structure)) {
363 if (substr($structure, $pos, 2) == '\\"')
364 $pos ++;
365 elseif (substr($structure, $pos, 2) == '\\\\')
366 $pos ++;
367 $pos ++;
368 }
369 } else if ($char == "(") {
370 $pos = mime_match_parenthesis ($pos, $structure);
371 }
372 }
373 echo "Error decoding mime structure. Report this as a bug!<br>\n";
374 return $pos;
375 }
376
377 function mime_fetch_body ($imap_stream, $id, $ent_id) {
378 // do a bit of error correction. If we couldn't find the entity id, just guess
379 // that it is the first one. That is usually the case anyway.
380 if (!$ent_id) $ent_id = 1;
381
382 fputs ($imap_stream, "a010 FETCH $id BODY[$ent_id]\r\n");
383 $data = sqimap_read_data ($imap_stream, 'a010', true, $response, $message);
384 $topline = array_shift($data);
385 while (! ereg('\\* [0-9]+ FETCH ', $topline) && $data)
386 $topline = array_shift($data);
387 $wholemessage = implode('', $data);
388
389 if (ereg('\\{([^\\}]*)\\}', $topline, $regs)) {
390 return substr($wholemessage, 0, $regs[1]);
391 }
392 else if (ereg('"([^"]*)"', $topline, $regs)) {
393 return $regs[1];
394 }
395
396 $str = "Body retrival error. Please report this bug!\n";
397 $str .= "Response: $response\n";
398 $str .= "Message: $message\n";
399 $str .= "FETCH line: $topline";
400 $str .= "---------------\n$wholemessage";
401 foreach ($data as $d)
402 {
403 $str .= htmlspecialchars($d) . "\n";
404 }
405 return $str;
406 }
407
408 function mime_print_body_lines ($imap_stream, $id, $ent_id, $encoding) {
409 // do a bit of error correction. If we couldn't find the entity id, just guess
410 // that it is the first one. That is usually the case anyway.
411 if (!$ent_id) $ent_id = 1;
412
413 // Don't kill the connection if the browser is over a dialup
414 // and it would take over 30 seconds to download it.
415 set_time_limit(0);
416
417 fputs ($imap_stream, "a001 FETCH $id BODY[$ent_id]\r\n");
418 $cnt = 0;
419 $continue = true;
420 $read = fgets ($imap_stream,4096);
421 // This could be bad -- if the section has 'a001 OK'
422 // or similar, it will kill the download.
423 while (!ereg("^a001 (OK|BAD|NO)(.*)$", $read, $regs)) {
424 if (trim($read) == ")==") {
425 $read1 = $read;
426 $read = fgets ($imap_stream,4096);
427 if (ereg("^a001 (OK|BAD|NO)(.*)$", $read, $regs)) {
428 return;
429 } else {
430 echo decodeBody($read1, $encoding);
431 echo decodeBody($read, $encoding);
432 }
433 } else if ($cnt) {
434 echo decodeBody($read, $encoding);
435 }
436 $read = fgets ($imap_stream,4096);
437 $cnt++;
438 }
439 }
440
441 /* -[ END MIME DECODING ]----------------------------------------------------------- */
442
443
444
445 /** This is the first function called. It decides if this is a multipart
446 message or if it should be handled as a single entity
447 **/
448 function decodeMime ($imap_stream, &$header) {
449 global $username, $key, $imapServerAddress, $imapPort;
450 return mime_structure ($imap_stream, $header);
451 }
452
453 // This is here for debugging purposese. It will print out a list
454 // of all the entity IDs that are in the $message object.
455 function listEntities ($message) {
456 if ($message) {
457 if ($message->header->entity_id)
458 echo "<tt>" . $message->header->entity_id . " : " . $message->header->type0 . "/" . $message->header->type1 . "<br>";
459 for ($i = 0; $message->entities[$i]; $i++) {
460 $msg = listEntities($message->entities[$i], $ent_id);
461 if ($msg)
462 return $msg;
463 }
464 }
465 }
466
467 // returns a $message object for a particular entity id
468 function getEntity ($message, $ent_id) {
469 if ($message) {
470 if ($message->header->entity_id == $ent_id && strlen($ent_id) == strlen($message->header->entity_id)) {
471 return $message;
472 } else {
473 for ($i = 0; isset($message->entities[$i]); $i++) {
474 $msg = getEntity ($message->entities[$i], $ent_id);
475 if ($msg)
476 return $msg;
477 }
478 }
479 }
480 }
481
482 // figures out what entity to display and returns the $message object
483 // for that entity.
484 function findDisplayEntity ($message, $textOnly = 1)
485 {
486 global $show_html_default;
487
488 if (! $message)
489 return 0;
490
491 if ($message->header->type0 == "multipart" &&
492 $message->header->type1 == "alternative" &&
493 $show_html_default && ! $textOnly) {
494 $entity = findDisplayEntityHTML($message);
495 if ($entity != 0)
496 return $entity;
497 }
498
499 // Show text/plain or text/html -- the first one we find.
500 if ($message->header->type0 == 'text' &&
501 ($message->header->type1 == 'plain' ||
502 $message->header->type1 == 'html') &&
503 isset($message->header->entity_id))
504 return $message->header->entity_id;
505
506 for ($i=0; isset($message->entities[$i]); $i++) {
507 $entity = findDisplayEntity($message->entities[$i], $textOnly);
508 if ($entity != 0)
509 return $entity;
510 }
511
512 return 0;
513 }
514
515 // Shows the HTML version
516 function findDisplayEntityHTML ($message) {
517 if ($message->header->type0 == 'text' &&
518 $message->header->type1 == 'html' &&
519 isset($message->header->entity_id))
520 return $message->header->entity_id;
521 for ($i = 0; isset($message->entities[$i]); $i ++) {
522 $entity = findDisplayEntityHTML($message->entities[$i]);
523 if ($entity != 0)
524 return $entity;
525 }
526 return 0;
527 }
528
529 /** This returns a parsed string called $body. That string can then
530 be displayed as the actual message in the HTML. It contains
531 everything needed, including HTML Tags, Attachments at the
532 bottom, etc.
533 **/
534 function formatBody($imap_stream, $message, $color, $wrap_at) {
535 // this if statement checks for the entity to show as the
536 // primary message. To add more of them, just put them in the
537 // order that is their priority.
538 global $startMessage, $username, $key, $imapServerAddress, $imapPort;
539
540 $id = $message->header->id;
541 $urlmailbox = urlencode($message->header->mailbox);
542
543 // Get the right entity and redefine message to be this entity
544 // Pass the 0 to mean that we want the 'best' viewable one
545 $ent_num = findDisplayEntity ($message, 0);
546 $body_message = getEntity($message, $ent_num);
547 if (($body_message->header->type0 == "text") ||
548 ($body_message->header->type0 == "rfc822")) {
549
550 $body = mime_fetch_body ($imap_stream, $id, $ent_num);
551 $body = decodeBody($body, $body_message->header->encoding);
552
553 // If there are other types that shouldn't be formatted, add
554 // them here
555 if ($body_message->header->type1 != "html") {
556 translateText($body, $wrap_at, $body_message->header->charset);
557 }
558
559 $body .= "<SMALL><CENTER><A HREF=\"../src/download.php?absolute_dl=true&passed_id=$id&passed_ent_id=$ent_num&mailbox=$urlmailbox&showHeaders=1\">". _("Download this as a file") ."</A></CENTER><BR></SMALL>";
560
561 /** Display the ATTACHMENTS: message if there's more than one part **/
562 $body .= "</TD></TR></TABLE>";
563 if (isset($message->entities[0])) {
564 $body .= formatAttachments ($message, $ent_num, $message->header->mailbox, $id);
565 }
566 $body .= "</TD></TR></TABLE>";
567 } else {
568 $body = formatAttachments ($message, -1, $message->header->mailbox, $id);
569 }
570 return $body;
571 }
572
573 // A recursive function that returns a list of attachments with links
574 // to where to download these attachments
575 function formatAttachments ($message, $ent_id, $mailbox, $id) {
576 global $where, $what;
577 global $startMessage, $color;
578 static $ShownHTML = 0;
579
580 $body = "";
581 if ($ShownHTML == 0)
582 {
583 $ShownHTML = 1;
584
585 $body .= "<TABLE WIDTH=100% CELLSPACING=0 CELLPADDING=2 BORDER=0 BGCOLOR=\"$color[0]\"><TR>\n";
586 $body .= "<TH ALIGN=\"left\" BGCOLOR=\"$color[9]\"><B>\n";
587 $body .= _("Attachments") . ':';
588 $body .= "</B></TH></TR><TR><TD>\n";
589
590 $body .= "<TABLE CELLSPACING=0 CELLPADDING=1 BORDER=0>\n";
591
592 $body .= formatAttachments ($message, $ent_id, $mailbox, $id);
593
594 $body .= "</TABLE></TD></TR></TABLE>";
595
596 return $body;
597 }
598
599 if ($message) {
600 if (!$message->entities) {
601 $type0 = strtolower($message->header->type0);
602 $type1 = strtolower($message->header->type1);
603 $name = decodeHeader($message->header->name);
604
605 if ($message->header->entity_id != $ent_id) {
606 $filename = decodeHeader($message->header->filename);
607 if (trim($filename) == "") {
608 if (trim($name) == "") {
609 $display_filename = "untitled-".$message->header->entity_id;
610 } else {
611 $display_filename = $name;
612 $filename = $name;
613 }
614 } else {
615 $display_filename = $filename;
616 }
617
618 $urlMailbox = urlencode($mailbox);
619 $ent = urlencode($message->header->entity_id);
620
621 $DefaultLink =
622 "../src/download.php?startMessage=$startMessage&passed_id=$id&mailbox=$urlMailbox&passed_ent_id=$ent";
623 if ($where && $what)
624 $DefaultLink .= '&where=' . urlencode($where) . '&what=' . urlencode($what);
625 $Links['download link']['text'] = _("download");
626 $Links['download link']['href'] =
627 "../src/download.php?absolute_dl=true&passed_id=$id&mailbox=$urlMailbox&passed_ent_id=$ent";
628 $ImageURL = '';
629
630 $HookResults = do_hook("attachment $type0/$type1", $Links,
631 $startMessage, $id, $urlMailbox, $ent, $DefaultLink,
632 $display_filename, $where, $what);
633
634 $Links = $HookResults[1];
635 $DefaultLink = $HookResults[6];
636
637 $body .= '<TR><TD>&nbsp;&nbsp;</TD><TD>';
638 $body .= "<A HREF=\"$DefaultLink\">$display_filename</A>&nbsp;</TD>";
639 $body .= '<TD><SMALL><b>' . show_readable_size($message->header->size) .
640 '</b>&nbsp;&nbsp;</small></TD>';
641 $body .= "<TD><SMALL>[ $type0/$type1 ]&nbsp;</SMALL></TD>";
642 $body .= '<TD><SMALL>';
643 if ($message->header->description)
644 $body .= '<b>' . htmlspecialchars($message->header->description) . '</b>';
645 $body .= '</SMALL></TD><TD><SMALL>&nbsp;';
646
647
648 $SkipSpaces = 1;
649 foreach ($Links as $Val)
650 {
651 if ($SkipSpaces)
652 {
653 $SkipSpaces = 0;
654 }
655 else
656 {
657 $body .= '&nbsp;&nbsp;|&nbsp;&nbsp;';
658 }
659 $body .= '<a href="' . $Val['href'] . '">' . $Val['text'] . '</a>';
660 }
661
662 unset($Links);
663
664 $body .= "</SMALL></TD></TR>\n";
665 }
666 return $body;
667 } else {
668 for ($i = 0; $i < count($message->entities); $i++) {
669 $body .= formatAttachments ($message->entities[$i], $ent_id, $mailbox, $id);
670 }
671 return $body;
672 }
673 }
674 }
675
676
677 /** this function decodes the body depending on the encoding type. **/
678 function decodeBody($body, $encoding) {
679 $body = str_replace("\r\n", "\n", $body);
680 $encoding = strtolower($encoding);
681
682 if ($encoding == "quoted-printable") {
683 $body = quoted_printable_decode($body);
684
685 while (ereg("=\n", $body))
686 $body = ereg_replace ("=\n", "", $body);
687 } else if ($encoding == "base64") {
688 $body = base64_decode($body);
689 }
690
691 // All other encodings are returned raw.
692 return $body;
693 }
694
695
696 // This functions decode strings that is encoded according to
697 // RFC1522 (MIME Part Two: Message Header Extensions for Non-ASCII Text).
698 function decodeHeader ($string) {
699 if (eregi('=\\?([^?]+)\\?(q|b)\\?([^?]+)\\?=',
700 $string, $res)) {
701 if (ucfirst($res[2]) == "B") {
702 $replace = base64_decode($res[3]);
703 } else {
704 $replace = ereg_replace("_", " ", $res[3]);
705 // Convert lowercase Quoted Printable to uppercase for
706 // quoted_printable_decode to understand it.
707 while (ereg("(=(([0-9][abcdef])|([abcdef][0-9])|([abcdef][abcdef])))", $replace, $res)) {
708 $replace = str_replace($res[1], strtoupper($res[1]), $replace);
709 }
710 $replace = quoted_printable_decode($replace);
711 }
712
713 $replace = charset_decode ($res[1], $replace);
714
715 // Remove the name of the character set.
716 $string = eregi_replace ('=\\?([^?]+)\\?(q|b)\\?([^?]+)\\?=',
717 $replace, $string);
718
719 // In case there should be more encoding in the string: recurse
720 return (decodeHeader($string));
721 } else
722 return ($string);
723 }
724
725 // Encode a string according to RFC 1522 for use in headers if it
726 // contains 8-bit characters or anything that looks like it should
727 // be encoded.
728 function encodeHeader ($string) {
729 global $default_charset;
730
731 // Encode only if the string contains 8-bit characters or =?
732 if (ereg("([\\200-\\377]|=\\?)", $string)) {
733
734 // First the special characters
735 $string = str_replace("=", "=3D", $string);
736 $string = str_replace("?", "=3F", $string);
737 $string = str_replace("_", "=5F", $string);
738 $string = str_replace(" ", "_", $string);
739
740 for ( $ch = 127 ; $ch <= 255 ; $ch++ ) {
741 $replace = chr($ch);
742 $insert = sprintf("=%02X", $ch);
743 $string = str_replace($replace, $insert, $string);
744 }
745
746 $newstring = "=?$default_charset?Q?".$string."?=";
747
748 return $newstring;
749 }
750
751 return $string;
752 }
753
754 ?>