| 1 | <?php |
| 2 | /** mime.php |
| 3 | ** |
| 4 | ** This contains the functions necessary to detect and decode MIME |
| 5 | ** messages. |
| 6 | ** |
| 7 | **/ |
| 8 | |
| 9 | $debug_mime = false; |
| 10 | $mime_php = true; |
| 11 | |
| 12 | if (!isset($i18n_php)) |
| 13 | include "../functions/i18n.php"; |
| 14 | if (!isset($imap_php)) |
| 15 | include "../functions/imap.php"; |
| 16 | if (!isset($config_php)) |
| 17 | include "../config/config.php"; |
| 18 | |
| 19 | |
| 20 | /** Setting up the objects that have the structure for the message **/ |
| 21 | |
| 22 | class msg_header { |
| 23 | /** msg_header contains generic variables for values that **/ |
| 24 | /** could be in a header. **/ |
| 25 | |
| 26 | var $type0, $type1, $boundary, $charset, $encoding; |
| 27 | var $to, $from, $date, $cc, $bcc, $reply_to, $subject; |
| 28 | var $id, $mailbox, $description; |
| 29 | var $entity_id; |
| 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 $entities; |
| 40 | |
| 41 | function addEntity ($msg) { |
| 42 | $this->entities[count($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 | $read = fgets ($imap_stream, 10000); |
| 62 | $read = strtolower($read); |
| 63 | |
| 64 | if ($debug_mime) echo "<tt>$read</tt><br><br>"; |
| 65 | // isolate the body structure and remove beginning and end parenthesis |
| 66 | $read = trim(substr ($read, strpos($read, "bodystructure") + 13)); |
| 67 | $read = trim(substr ($read, 0, -1)); |
| 68 | $end = mime_match_parenthesis(0, $read); |
| 69 | while ($end == strlen($read)-1) { |
| 70 | $read = trim(substr ($read, 0, -1)); |
| 71 | $read = trim(substr ($read, 1)); |
| 72 | $end = mime_match_parenthesis(0, $read); |
| 73 | } |
| 74 | |
| 75 | if ($debug_mime) echo "<tt>$read</tt><br><br>"; |
| 76 | |
| 77 | $msg = mime_parse_structure ($read); |
| 78 | $msg->header = $header; |
| 79 | return $msg; |
| 80 | } |
| 81 | |
| 82 | // this starts the parsing of a particular structure. It is called recursively, |
| 83 | // so it can be passed different structures. It returns an object of type |
| 84 | // $message. |
| 85 | // First, it checks to see if it is a multipart message. If it is, then it |
| 86 | // handles that as it sees is necessary. If it is just a regular entity, |
| 87 | // then it parses it and adds the necessary header information (by calling out |
| 88 | // to mime_get_elements() |
| 89 | function mime_parse_structure ($structure, $ent_id) { |
| 90 | global $debug_mime; |
| 91 | if ($debug_mime) echo "<font color=008800><tt>START: mime_parse_structure()</tt></font><br>"; |
| 92 | $msg = new message(); |
| 93 | if (substr($structure, 0, 1) == "(") { |
| 94 | $ent_id = mime_new_element_level($ent_id); |
| 95 | $start = $end = -1; |
| 96 | if ($debug_mime) echo "<br><font color=0000aa><tt>$structure</tt></font><br>"; |
| 97 | do { |
| 98 | if ($debug_mime) echo "<font color=008800><tt>Found entity...</tt></font><br>"; |
| 99 | $start = $end+1; |
| 100 | $end = mime_match_parenthesis ($start, $structure); |
| 101 | |
| 102 | $element = substr($structure, $start+1, ($end - $start)-1); |
| 103 | $ent_id = mime_increment_id ($ent_id); |
| 104 | $newmsg = mime_parse_structure ($element, $ent_id); |
| 105 | $msg->addEntity ($newmsg); |
| 106 | } while (substr($structure, $end+1, 1) == "("); |
| 107 | } else { |
| 108 | // parse the elements |
| 109 | if ($debug_mime) echo "<br><font color=0000aa><tt>$structure</tt></font><br>"; |
| 110 | $msg = mime_get_element (&$structure, $msg, $ent_id); |
| 111 | if ($debug_mime) echo "<br>"; |
| 112 | } |
| 113 | return $msg; |
| 114 | if ($debug_mime) echo "<font color=008800><tt> END: mime_parse_structure()</tt></font><br>"; |
| 115 | } |
| 116 | |
| 117 | // Increments the element ID. An element id can look like any of |
| 118 | // the following: 1, 1.2, 4.3.2.4.1, etc. This function increments |
| 119 | // the last number of the element id, changing 1.2 to 1.3. |
| 120 | function mime_increment_id ($id) { |
| 121 | global $debug_mime; |
| 122 | if (strpos($id, ".")) { |
| 123 | $first = substr($id, 0, strrpos($id, ".")); |
| 124 | $last = substr($id, strrpos($id, ".")+1); |
| 125 | $last++; |
| 126 | $new = $first . "." .$last; |
| 127 | } else { |
| 128 | $new = $id + 1; |
| 129 | } |
| 130 | if ($debug_mime) echo "<b>INCREMENT: $new</b><br>"; |
| 131 | return $new; |
| 132 | } |
| 133 | |
| 134 | // See comment for mime_increment_id(). |
| 135 | // This adds another level on to the entity_id changing 1.3 to 1.3.0 |
| 136 | // NOTE: 1.3.0 is not a valid element ID. It MUST be incremented |
| 137 | // before it can be used. I left it this way so as not to have |
| 138 | // to make a special case if it is the first entity_id. It |
| 139 | // always increments it, and that works fine. |
| 140 | function mime_new_element_level ($id) { |
| 141 | if (!$id) $id = 0; |
| 142 | else $id = $id . ".0"; |
| 143 | |
| 144 | return $id; |
| 145 | } |
| 146 | |
| 147 | function mime_get_element (&$structure, $msg, $ent_id) { |
| 148 | global $debug_mime; |
| 149 | $elem_num = 1; |
| 150 | $msg->header = new msg_header(); |
| 151 | $msg->header->entity_id = $ent_id; |
| 152 | |
| 153 | while (strlen($structure) > 0) { |
| 154 | $structure = trim($structure); |
| 155 | $char = substr($structure, 0, 1); |
| 156 | |
| 157 | if (substr($structure, 0, 3) == "nil") { |
| 158 | $text = ""; |
| 159 | $structure = substr($structure, 3); |
| 160 | } else if ($char == "\"") { |
| 161 | // loop through until we find the matching quote, and return that as a string |
| 162 | $pos = 1; |
| 163 | $char = substr($structure, $pos, 1); |
| 164 | while ($char != "\"" && $pos < strlen($structure)) { |
| 165 | $text .= $char; |
| 166 | $pos++; |
| 167 | $char = substr($structure, $pos, 1); |
| 168 | } |
| 169 | $structure = substr($structure, strlen($text) + 2); |
| 170 | } else if ($char == "(") { |
| 171 | // comment me |
| 172 | $end = mime_match_parenthesis (0, $structure); |
| 173 | $sub = substr($structure, 1, $end-1); |
| 174 | $properties = mime_get_props($properties, $sub); |
| 175 | $structure = substr($structure, strlen($sub) + 2); |
| 176 | } else { |
| 177 | // loop through until we find a space or an end parenthesis |
| 178 | $pos = 0; |
| 179 | $char = substr($structure, $pos, 1); |
| 180 | while ($char != " " && $char != ")" && $pos < strlen($structure)) { |
| 181 | $text .= $char; |
| 182 | $pos++; |
| 183 | $char = substr($structure, $pos, 1); |
| 184 | } |
| 185 | $structure = substr($structure, strlen($text)); |
| 186 | } |
| 187 | if ($debug_mime) echo "<tt>$elem_num : $text</tt><br>"; |
| 188 | |
| 189 | // This is where all the text parts get put into the header |
| 190 | switch ($elem_num) { |
| 191 | case 1: |
| 192 | $msg->header->type0 = $text; |
| 193 | if ($debug_mime) echo "<tt>type0 = $text</tt><br>"; |
| 194 | break; |
| 195 | case 2: |
| 196 | $msg->header->type1 = $text; |
| 197 | if ($debug_mime) echo "<tt>type1 = $text</tt><br>"; |
| 198 | break; |
| 199 | case 5: |
| 200 | $msg->header->description = $text; |
| 201 | if ($debug_mime) echo "<tt>description = $text</tt><br>"; |
| 202 | break; |
| 203 | case 6: |
| 204 | $msg->header->encoding = $text; |
| 205 | if ($debug_mime) echo "<tt>encoding = $text</tt><br>"; |
| 206 | break; |
| 207 | case 7: |
| 208 | $msg->header->size = $text; |
| 209 | if ($debug_mime) echo "<tt>size = $text</tt><br>"; |
| 210 | break; |
| 211 | default: |
| 212 | if ($msg->header->type0 == "text" && $elem_num == 8) { |
| 213 | // This is a plain text message, so lets get the number of lines |
| 214 | // that it contains. |
| 215 | $msg->header->num_lines = $text; |
| 216 | if ($debug_mime) echo "<tt>num_lines = $text</tt><br>"; |
| 217 | |
| 218 | } else if ($msg->header->type0 == "message" && $msg->header->type1 == "rfc822" && $elem_num == 8) { |
| 219 | // This is an encapsulated message, so lets start all over again and |
| 220 | // parse this message adding it on to the existing one. |
| 221 | $structure = trim($structure); |
| 222 | if (substr($structure, 0, 1) == "(") { |
| 223 | $e = mime_match_parenthesis (0, $structure); |
| 224 | $structure = substr($structure, 0, $e); |
| 225 | $structure = substr($structure, 1); |
| 226 | $m = mime_parse_structure($structure, $msg->header->entity_id); |
| 227 | |
| 228 | // the following conditional is there to correct a bug that wasn't |
| 229 | // incrementing the entity IDs correctly because of the special case |
| 230 | // that message/rfc822 is. This fixes it fine. |
| 231 | if (substr($structure, 1, 1) != "(") |
| 232 | $m->header->entity_id = mime_increment_id(mime_new_element_level($ent_id)); |
| 233 | |
| 234 | // Now we'll go through and reformat the results. |
| 235 | if ($m->entities) { |
| 236 | for ($i=0; $i < count($m->entities); $i++) { |
| 237 | $msg->addEntity($m->entities[$i]); |
| 238 | } |
| 239 | } else { |
| 240 | $msg->addEntity($m); |
| 241 | } |
| 242 | $structure = ""; |
| 243 | } |
| 244 | } |
| 245 | break; |
| 246 | } |
| 247 | $elem_num++; |
| 248 | $text = ""; |
| 249 | } |
| 250 | // loop through the additional properties and put those in the various headers |
| 251 | if ($msg->header->type0 != "message") { |
| 252 | for ($i=0; $i < count($properties); $i++) { |
| 253 | $msg->header->{$properties[$i]["name"]} = $properties[$i]["value"]; |
| 254 | if ($debug_mime) echo "<tt>".$properties[$i]["name"]." = " . $properties[$i]["value"] . "</tt><br>"; |
| 255 | } |
| 256 | } |
| 257 | return $msg; |
| 258 | } |
| 259 | |
| 260 | // I did most of the MIME stuff yesterday (June 20, 2000), but I couldn't |
| 261 | // figure out how to do this part, so I decided to go to bed. I woke up |
| 262 | // in the morning and had a flash of insight. I went to the white-board |
| 263 | // and scribbled it out, then spent a bit programming it, and this is the |
| 264 | // result. Nothing complicated, but I think my brain was fried yesterday. |
| 265 | // Funny how that happens some times. |
| 266 | // |
| 267 | // This gets properties in a nested parenthesisized list. For example, |
| 268 | // this would get passed something like: ("attachment" ("filename" "luke.tar.gz")) |
| 269 | // This returns an array called $props with all paired up properties. |
| 270 | // It ignores the "attachment" for now, maybe that should change later |
| 271 | // down the road. In this case, what is returned is: |
| 272 | // $props[0]["name"] = "filename"; |
| 273 | // $props[0]["value"] = "luke.tar.gz"; |
| 274 | function mime_get_props ($props, $structure) { |
| 275 | global $debug_mime; |
| 276 | while (strlen($structure) > 0) { |
| 277 | $structure = trim($structure); |
| 278 | $char = substr($structure, 0, 1); |
| 279 | |
| 280 | if ($char == "\"") { |
| 281 | $pos = 1; |
| 282 | $char = substr($structure, $pos, 1); |
| 283 | while ($char != "\"" && $pos < strlen($structure)) { |
| 284 | $tmp .= $char; |
| 285 | $pos++; |
| 286 | $char = substr($structure, $pos, 1); |
| 287 | } |
| 288 | $structure = trim(substr($structure, strlen($tmp) + 2)); |
| 289 | $char = substr($structure, 0, 1); |
| 290 | |
| 291 | if ($char == "\"") { |
| 292 | $pos = 1; |
| 293 | $char = substr($structure, $pos, 1); |
| 294 | while ($char != "\"" && $pos < strlen($structure)) { |
| 295 | $value .= $char; |
| 296 | $pos++; |
| 297 | $char = substr($structure, $pos, 1); |
| 298 | } |
| 299 | $structure = trim(substr($structure, strlen($tmp) + 2)); |
| 300 | |
| 301 | $k = count($props); |
| 302 | $props[$k]["name"] = $tmp; |
| 303 | $props[$k]["value"] = $value; |
| 304 | } else if ($char == "(") { |
| 305 | $end = mime_match_parenthesis (0, $structure); |
| 306 | $sub = substr($structure, 1, $end-1); |
| 307 | $props = mime_get_props($props, $sub); |
| 308 | $structure = substr($structure, strlen($sub) + 2); |
| 309 | } |
| 310 | return $props; |
| 311 | } else if ($char == "(") { |
| 312 | $end = mime_match_parenthesis (0, $structure); |
| 313 | $sub = substr($structure, 1, $end-1); |
| 314 | $props = mime_get_props($props, $sub); |
| 315 | $structure = substr($structure, strlen($sub) + 2); |
| 316 | return $props; |
| 317 | } else { |
| 318 | return $props; |
| 319 | } |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | // Matches parenthesis. It will return the position of the matching |
| 324 | // parenthesis in $structure. For instance, if $structure was: |
| 325 | // ("text" "plain" ("val1name", "1") nil ... ) |
| 326 | // x x |
| 327 | // then this would return 42 to match up those two. |
| 328 | function mime_match_parenthesis ($pos, $structure) { |
| 329 | $char = substr($structure, $pos, 1); |
| 330 | |
| 331 | // ignore all extra characters |
| 332 | while ($pos < strlen($structure)) { |
| 333 | $pos++; |
| 334 | $char = substr($structure, $pos, 1); |
| 335 | if ($char == ")") { |
| 336 | return $pos; |
| 337 | } else if ($char == "(") { |
| 338 | $pos = mime_match_parenthesis ($pos, $structure); |
| 339 | } |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | function mime_fetch_body ($imap_stream, $id, $ent_id) { |
| 344 | // do a bit of error correction. If we couldn't find the entity id, just guess |
| 345 | // that it is the first one. That is usually the case anyway. |
| 346 | if (!$ent_id) $ent_id = 1; |
| 347 | |
| 348 | fputs ($imap_stream, "a001 FETCH $id BODY[$ent_id]\r\n"); |
| 349 | $topline = fgets ($imap_stream, 1024); |
| 350 | $size = substr ($topline, strpos($topline, "{")+1); |
| 351 | $size = substr ($size, 0, strpos($size, "}")); |
| 352 | $read = fread ($imap_stream, $size); |
| 353 | return $read; |
| 354 | } |
| 355 | |
| 356 | /* -[ END MIME DECODING ]----------------------------------------------------------- */ |
| 357 | |
| 358 | |
| 359 | |
| 360 | /** This is the first function called. It decides if this is a multipart |
| 361 | message or if it should be handled as a single entity |
| 362 | **/ |
| 363 | function decodeMime ($body, $header) { |
| 364 | global $username, $key, $imapServerAddress, $imapPort; |
| 365 | $imap_stream = sqimap_login($username, $key, $imapServerAddress, $imapPort, 0); |
| 366 | sqimap_mailbox_select($imap_stream, $header->mailbox); |
| 367 | |
| 368 | return mime_structure ($imap_stream, $header); |
| 369 | } |
| 370 | |
| 371 | // This is here for debugging purposese. It will print out a list |
| 372 | // of all the entity IDs that are in the $message object. |
| 373 | function listEntities ($message) { |
| 374 | if ($message) { |
| 375 | if ($message->header->entity_id) |
| 376 | echo "<tt>" . $message->header->entity_id . " : " . $message->header->type0 . "/" . $message->header->type1 . "<br>"; |
| 377 | for ($i = 0; $message->entities[$i]; $i++) { |
| 378 | $msg = listEntities($message->entities[$i], $ent_id); |
| 379 | if ($msg) |
| 380 | return $msg; |
| 381 | } |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | // returns a $message object for a particular entity id |
| 386 | function getEntity ($message, $ent_id) { |
| 387 | if ($message) { |
| 388 | if ($message->header->entity_id == $ent_id && strlen($ent_id) == strlen($message->header->entity_id)) { |
| 389 | return $message; |
| 390 | } else { |
| 391 | for ($i = 0; $message->entities[$i]; $i++) { |
| 392 | $msg = getEntity ($message->entities[$i], $ent_id); |
| 393 | if ($msg) |
| 394 | return $msg; |
| 395 | } |
| 396 | } |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | // figures out what entity to display and returns the $message object |
| 401 | // for that entity. |
| 402 | function findDisplayEntity ($message) { |
| 403 | if ($message) { |
| 404 | if ($message->header->type0 == "text") { |
| 405 | if ($message->header->type1 == "plain" || |
| 406 | $message->header->type1 == "html") { |
| 407 | return $message->header->entity_id; |
| 408 | } |
| 409 | } else { |
| 410 | for ($i=0; $message->entities[$i]; $i++) { |
| 411 | return findDisplayEntity($message->entities[$i]); |
| 412 | } |
| 413 | } |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | /** This returns a parsed string called $body. That string can then |
| 418 | be displayed as the actual message in the HTML. It contains |
| 419 | everything needed, including HTML Tags, Attachments at the |
| 420 | bottom, etc. |
| 421 | **/ |
| 422 | function formatBody($message, $color, $wrap_at) { |
| 423 | // this if statement checks for the entity to show as the |
| 424 | // primary message. To add more of them, just put them in the |
| 425 | // order that is their priority. |
| 426 | global $username, $key, $imapServerAddress, $imapPort; |
| 427 | |
| 428 | $id = $message->header->id; |
| 429 | $urlmailbox = urlencode($message->header->mailbox); |
| 430 | |
| 431 | $imap_stream = sqimap_login($username, $key, $imapServerAddress, $imapPort, 0); |
| 432 | sqimap_mailbox_select($imap_stream, $message->header->mailbox); |
| 433 | |
| 434 | $ent_num = findDisplayEntity ($message); |
| 435 | $body = mime_fetch_body ($imap_stream, $id, $ent_num); |
| 436 | |
| 437 | // If there are other types that shouldn't be formatted, add |
| 438 | // them here |
| 439 | if ($message->header->type1 != "html") { |
| 440 | $body = translateText($body, $wrap_at, $charset); |
| 441 | } |
| 442 | |
| 443 | $body .= "<BR><SMALL><CENTER><A HREF=\"../src/download.php?absolute_dl=true&passed_id=$id&passed_ent_id=$ent_num&mailbox=$urlmailbox\">". _("Download this as a file") ."</A></CENTER><BR></SMALL>"; |
| 444 | |
| 445 | /** Display the ATTACHMENTS: message if there's more than one part **/ |
| 446 | if ($message->entities) { |
| 447 | $body .= "<TABLE WIDTH=100% CELLSPACING=0 CELLPADDING=4 BORDER=0><TR><TD BGCOLOR=\"$color[0]\">"; |
| 448 | $body .= "<TT><B>ATTACHMENTS:</B></TT>"; |
| 449 | $body .= "</TD></TR><TR><TD BGCOLOR=\"$color[0]\">"; |
| 450 | $num = 0; |
| 451 | |
| 452 | /** make this recurisve at some point **/ |
| 453 | $body .= formatAttachments ($message, $ent_num, $message->header->mailbox, $id); |
| 454 | $body .= "</TD></TR></TABLE>"; |
| 455 | } |
| 456 | return $body; |
| 457 | } |
| 458 | |
| 459 | // A recursive function that returns a list of attachments with links |
| 460 | // to where to download these attachments |
| 461 | function formatAttachments ($message, $ent_id, $mailbox, $id) { |
| 462 | if ($message) { |
| 463 | if (!$message->entities) { |
| 464 | $type0 = strtolower($message->header->type0); |
| 465 | $type1 = strtolower($message->header->type1); |
| 466 | |
| 467 | if ($message->header->entity_id != $ent_id) { |
| 468 | $filename = $message->header->filename; |
| 469 | if (trim($filename) == "") { |
| 470 | $display_filename = "untitled-".$message->header->entity_id; |
| 471 | } else { |
| 472 | $display_filename = $filename; |
| 473 | } |
| 474 | |
| 475 | $urlMailbox = urlencode($mailbox); |
| 476 | $ent = urlencode($message->header->entity_id); |
| 477 | $body .= "<TT> <A HREF=\"../src/download.php?passed_id=$id&mailbox=$urlMailbox&passed_ent_id=$ent\">" . $display_filename . "</A> (TYPE: $type0/$type1)"; |
| 478 | if ($message->header->description) |
| 479 | $body .= " <b>" . htmlspecialchars($message->header->description)."</b>"; |
| 480 | if ($message->header->type0 == "image" && |
| 481 | ($message->header->type1 == "jpg" || |
| 482 | $message->header->type1 == "jpeg" || |
| 483 | $message->header->type1 == "gif" || |
| 484 | $message->header->type1 == "png")) |
| 485 | $body .= " (<a href=\"../src/download.php?passed_id=$id&mailbox=$urlMailbox&passed_ent_id=$ent&view=true\">"._("view")."</a>)\n"; |
| 486 | $body .= "</TT><BR>"; |
| 487 | $num++; |
| 488 | } |
| 489 | return $body; |
| 490 | } else { |
| 491 | for ($i = 0; $i < count($message->entities); $i++) { |
| 492 | $body .= formatAttachments ($message->entities[$i], $ent_id, $mailbox, $id); |
| 493 | } |
| 494 | return $body; |
| 495 | } |
| 496 | } |
| 497 | } |
| 498 | |
| 499 | |
| 500 | /** this function decodes the body depending on the encoding type. **/ |
| 501 | function decodeBody($body, $encoding) { |
| 502 | $encoding = strtolower($encoding); |
| 503 | |
| 504 | if ($encoding == "quoted-printable") { |
| 505 | $body = quoted_printable_decode($body); |
| 506 | |
| 507 | while (ereg("=\n", $body)) |
| 508 | $body = ereg_replace ("=\n", "", $body); |
| 509 | } else if ($encoding == "base64") { |
| 510 | $body = base64_decode($body); |
| 511 | } |
| 512 | |
| 513 | // All other encodings are returned raw. |
| 514 | return $body; |
| 515 | } |
| 516 | |
| 517 | |
| 518 | // This functions decode strings that is encoded according to |
| 519 | // RFC1522 (MIME Part Two: Message Header Extensions for Non-ASCII Text). |
| 520 | function decodeHeader ($string) { |
| 521 | if (eregi('=\?([^?]+)\?(q|b)\?([^?]+)\?=', |
| 522 | $string, $res)) { |
| 523 | if (ucfirst($res[2]) == "B") { |
| 524 | $replace = base64_decode($res[3]); |
| 525 | } else { |
| 526 | $replace = ereg_replace("_", " ", $res[3]); |
| 527 | $replace = quoted_printable_decode($replace); |
| 528 | } |
| 529 | |
| 530 | $replace = charset_decode ($res[1], $replace); |
| 531 | |
| 532 | $string = eregi_replace |
| 533 | ('=\?([^?]+)\?(q|b)\?([^?]+)\?=', |
| 534 | $replace, $string); |
| 535 | // In case there should be more encoding in the string: recurse |
| 536 | return (decodeHeader($string)); |
| 537 | } else |
| 538 | return ($string); |
| 539 | } |
| 540 | |
| 541 | // Encode a string according to RFC 1522 for use in headers if it |
| 542 | // contains 8-bit characters |
| 543 | function encodeHeader ($string) { |
| 544 | global $default_charset; |
| 545 | |
| 546 | // Encode only if the string contains 8-bit characters |
| 547 | if (ereg("[\200-\377]", $string)) { |
| 548 | $newstring = "=?$default_charset?Q?"; |
| 549 | $newstring .= str_replace(" ", "_", $string); |
| 550 | |
| 551 | while (ereg("([\200-\377])", $newstring, $regs)) { |
| 552 | $replace = $regs[1]; |
| 553 | $insert = "=" . bin2hex($replace); |
| 554 | $newstring = str_replace($replace, $insert, $newstring); |
| 555 | } |
| 556 | |
| 557 | $newstring .= "?="; |
| 558 | |
| 559 | return $newstring; |
| 560 | } |
| 561 | |
| 562 | return $string; |
| 563 | } |
| 564 | |
| 565 | ?> |