X-Git-Url: https://vcs.fsf.org/?a=blobdiff_plain;f=functions%2Fmime.php;h=ce634671d5882d1e64e8885c9041b86ac14a5389;hb=5155cfcbc15139e9f1cbd6e6bf8450c30e294bc3;hp=dc9a6854058d3daadc2b76bbf7205f957bf18ead;hpb=0f1835f3980145bab8afef56f9caa59502b82bd4;p=squirrelmail.git
diff --git a/functions/mime.php b/functions/mime.php
index dc9a6854..ce634671 100644
--- a/functions/mime.php
+++ b/functions/mime.php
@@ -1,141 +1,578 @@
-
+";
- if ($type0 == "multipart") {
- if ($body[0] == "")
- $i = 1;
- else
- $i = 0;
-
- $bound = trim($bound);
- $bound = "--$bound";
- while ($i < count($body)) {
- if (trim($body[$i]) == $bound) {
- $j = $i + 1;
- $p = 0;
-
- while (substr(trim($body[$j]), 0, strlen($bound)) != $bound) {
- $entity_body[$p] = $body[$j];
- $j++;
- $p++;
- }
- fetchEntityHeader($imapConnection, $entity_body, $ent_type0, $ent_type1, $ent_bound, &$encoding, &$charset);
- $entity = getEntity($entity_body, $ent_bound, $ent_type0, $ent_type1, $encoding, $charset);
+ if (!isset($i18n_php))
+ include "../functions/i18n.php";
+ if (!isset($imap_php))
+ include "../functions/imap.php";
+ if (!isset($config_php))
+ include "../config/config.php";
- $q = count($full_message);
- $full_message[$q] = $entity[0];
- }
- $i++;
- }
+
+ /** Setting up the objects that have the structure for the message **/
+
+ class msg_header {
+ /** msg_header contains generic variables for values that **/
+ /** could be in a header. **/
+
+ var $type0, $type1, $boundary, $charset, $encoding;
+ var $to, $from, $date, $cc, $bcc, $reply_to, $subject;
+ var $id, $mailbox, $description;
+ var $entity_id, $message_id, $charset;
+ }
+
+ class message {
+ /** message is the object that contains messages. It is a recursive
+ object in that through the $entities variable, it can contain
+ more objects of type message. See documentation in mime.txt for
+ a better description of how this works.
+ **/
+ var $header;
+ var $entities;
+
+ function addEntity ($msg) {
+ $this->entities[count($this->entities)] = $msg;
+ }
+ }
+
+
+
+ /* --------------------------------------------------------------------------------- */
+ /* MIME DECODING */
+ /* --------------------------------------------------------------------------------- */
+
+ // This function gets the structure of a message and stores it in the "message" class.
+ // It will return this object for use with all relevant header information and
+ // fully parsed into the standard "message" object format.
+ function mime_structure ($imap_stream, $header) {
+ global $debug_mime;
+ sqimap_messages_flag ($imap_stream, $header->id, $header->id, "Seen");
+
+ $id = $header->id;
+ fputs ($imap_stream, "a001 FETCH $id BODYSTRUCTURE\r\n");
+ $read = fgets ($imap_stream, 10000);
+ $response = substr($read, 0, 4);
+ while ($response != "a001") {
+ $bodystructure = $read;
+ $read = fgets ($imap_stream, 10000);
+ $response = substr($read, 0, 4);
+ }
+ $read = strtolower($bodystructure);
+
+ if ($debug_mime) echo "$read
";
+ // isolate the body structure and remove beginning and end parenthesis
+ $read = trim(substr ($read, strpos($read, "bodystructure") + 13));
+ $read = trim(substr ($read, 0, -1));
+ $end = mime_match_parenthesis(0, $read);
+ while ($end == strlen($read)-1) {
+ $read = trim(substr ($read, 0, -1));
+ $read = trim(substr ($read, 1));
+ $end = mime_match_parenthesis(0, $read);
+ }
+
+ if ($debug_mime) echo "$read
";
+
+ $msg = mime_parse_structure ($read, 0);
+ $msg->header = $header;
+ return $msg;
+ }
+
+ // this starts the parsing of a particular structure. It is called recursively,
+ // so it can be passed different structures. It returns an object of type
+ // $message.
+ // First, it checks to see if it is a multipart message. If it is, then it
+ // handles that as it sees is necessary. If it is just a regular entity,
+ // then it parses it and adds the necessary header information (by calling out
+ // to mime_get_elements()
+ function mime_parse_structure ($structure, $ent_id) {
+ global $debug_mime;
+ if ($debug_mime) echo "START: mime_parse_structure() ";
+ $msg = new message();
+ if (substr($structure, 0, 1) == "(") {
+ $ent_id = mime_new_element_level($ent_id);
+ $start = $end = -1;
+ if ($debug_mime) echo " $structure ";
+ do {
+ if ($debug_mime) echo "Found entity... ";
+ $start = $end+1;
+ $end = mime_match_parenthesis ($start, $structure);
+
+ $element = substr($structure, $start+1, ($end - $start)-1);
+ $ent_id = mime_increment_id ($ent_id);
+ $newmsg = mime_parse_structure ($element, $ent_id);
+ $msg->addEntity ($newmsg);
+ } while (substr($structure, $end+1, 1) == "(");
+ } else {
+ // parse the elements
+ if ($debug_mime) echo " $structure ";
+ $msg = mime_get_element (&$structure, $msg, $ent_id);
+ if ($debug_mime) echo " ";
+ }
+ return $msg;
+ if ($debug_mime) echo " END: mime_parse_structure() ";
+ }
+
+ // Increments the element ID. An element id can look like any of
+ // the following: 1, 1.2, 4.3.2.4.1, etc. This function increments
+ // the last number of the element id, changing 1.2 to 1.3.
+ function mime_increment_id ($id) {
+ global $debug_mime;
+ if (strpos($id, ".")) {
+ $first = substr($id, 0, strrpos($id, "."));
+ $last = substr($id, strrpos($id, ".")+1);
+ $last++;
+ $new = $first . "." .$last;
} else {
- $full_message = getEntity($body, $bound, $type0, $type1);
+ $new = $id + 1;
}
+ if ($debug_mime) echo "INCREMENT: $new ";
+ return $new;
+ }
- return $full_message;
+ // See comment for mime_increment_id().
+ // This adds another level on to the entity_id changing 1.3 to 1.3.0
+ // NOTE: 1.3.0 is not a valid element ID. It MUST be incremented
+ // before it can be used. I left it this way so as not to have
+ // to make a special case if it is the first entity_id. It
+ // always increments it, and that works fine.
+ function mime_new_element_level ($id) {
+ if (!$id) $id = 0;
+ else $id = $id . ".0";
+
+ return $id;
}
- /** This gets one entity's properties **/
- function getEntity($body, $bound, $type0, $type1, $encoding, $charset) {
- echo "$type0/$type1 ";
- $msg[0]["TYPE0"] = $type0;
- $msg[0]["TYPE1"] = $type1;
- $msg[0]["ENCODING"] = $encoding;
- $msg[0]["CHARSET"] = $charset;
+ function mime_get_element (&$structure, $msg, $ent_id) {
+ global $debug_mime;
+ $elem_num = 1;
+ $msg->header = new msg_header();
+ $msg->header->entity_id = $ent_id;
+
+ while (strlen($structure) > 0) {
+ $structure = trim($structure);
+ $char = substr($structure, 0, 1);
- if ($type0 == "text") {
- if ($type1 == "plain") {
- $msg[0]["PRIORITY"] = 10;
- for ($p = 0;$p < count($body);$p++) {
- $msg[0]["BODY"][$p] = parsePlainTextMessage($body[$p]);
- }
- } else if ($type1 == "html") {
- $msg[0]["PRIORITY"] = 20;
- $msg[0]["BODY"] = $body;
+ if (substr($structure, 0, 3) == "nil") {
+ $text = "";
+ $structure = substr($structure, 3);
+ } else if ($char == "\"") {
+ // loop through until we find the matching quote, and return that as a string
+ $pos = 1;
+ $char = substr($structure, $pos, 1);
+ while ($char != "\"" && $pos < strlen($structure)) {
+ $text .= $char;
+ $pos++;
+ $char = substr($structure, $pos, 1);
+ }
+ $structure = substr($structure, strlen($text) + 2);
+ } else if ($char == "(") {
+ // comment me
+ $end = mime_match_parenthesis (0, $structure);
+ $sub = substr($structure, 1, $end-1);
+ $properties = mime_get_props($properties, $sub);
+ $structure = substr($structure, strlen($sub) + 2);
} else {
- $msg[0]["PRIORITY"] = 1;
- $msg[0]["BODY"][0] = "This entity is of an unknown format. Doing my best to display anyway...
";
- for ($p = 1;$p < count($body);$p++) {
- $q = $p - 1;
- $msg[0]["BODY"][$p] = $body[$q];
+ // loop through until we find a space or an end parenthesis
+ $pos = 0;
+ $char = substr($structure, $pos, 1);
+ while ($char != " " && $char != ")" && $pos < strlen($structure)) {
+ $text .= $char;
+ $pos++;
+ $char = substr($structure, $pos, 1);
}
+ $structure = substr($structure, strlen($text));
+ }
+ if ($debug_mime) echo "$elem_num : $text ";
+
+ // This is where all the text parts get put into the header
+ switch ($elem_num) {
+ case 1:
+ $msg->header->type0 = $text;
+ if ($debug_mime) echo "type0 = $text ";
+ break;
+ case 2:
+ $msg->header->type1 = $text;
+ if ($debug_mime) echo "type1 = $text ";
+ break;
+ case 5:
+ $msg->header->description = $text;
+ if ($debug_mime) echo "description = $text ";
+ break;
+ case 6:
+ $msg->header->encoding = $text;
+ if ($debug_mime) echo "encoding = $text ";
+ break;
+ case 7:
+ $msg->header->size = $text;
+ if ($debug_mime) echo "size = $text ";
+ break;
+ default:
+ if ($msg->header->type0 == "text" && $elem_num == 8) {
+ // This is a plain text message, so lets get the number of lines
+ // that it contains.
+ $msg->header->num_lines = $text;
+ if ($debug_mime) echo "num_lines = $text ";
+
+ } else if ($msg->header->type0 == "message" && $msg->header->type1 == "rfc822" && $elem_num == 8) {
+ // This is an encapsulated message, so lets start all over again and
+ // parse this message adding it on to the existing one.
+ $structure = trim($structure);
+ if (substr($structure, 0, 1) == "(") {
+ $e = mime_match_parenthesis (0, $structure);
+ $structure = substr($structure, 0, $e);
+ $structure = substr($structure, 1);
+ $m = mime_parse_structure($structure, $msg->header->entity_id);
+
+ // the following conditional is there to correct a bug that wasn't
+ // incrementing the entity IDs correctly because of the special case
+ // that message/rfc822 is. This fixes it fine.
+ if (substr($structure, 1, 1) != "(")
+ $m->header->entity_id = mime_increment_id(mime_new_element_level($ent_id));
+
+ // Now we'll go through and reformat the results.
+ if ($m->entities) {
+ for ($i=0; $i < count($m->entities); $i++) {
+ $msg->addEntity($m->entities[$i]);
+ }
+ } else {
+ $msg->addEntity($m);
+ }
+ $structure = "";
+ }
+ }
+ break;
+ }
+ $elem_num++;
+ $text = "";
+ }
+ // loop through the additional properties and put those in the various headers
+ if ($msg->header->type0 != "message") {
+ for ($i=0; $i < count($properties); $i++) {
+ $msg->header->{$properties[$i]["name"]} = $properties[$i]["value"];
+ if ($debug_mime) echo "".$properties[$i]["name"]." = " . $properties[$i]["value"] . " ";
}
- } else if ($type0 == "image") {
- $msg[0]["BODY"][0] = "This is an image. Squirrelmail currently cannot decode images.";
- } else {
- $msg[0]["BODY"][0] = "This attachment is of an unknown format: $type0/$type1";
}
return $msg;
}
- function formatBody($message) {
- for ($i=0; $i < count($message["ENTITIES"]); $i++) {
- if ($message["ENTITIES"][$i]["TYPE0"] == "text") {
- if ($message["ENTITIES"][$i]["PRIORITY"] > $priority)
- $priority = $message["ENTITIES"][$i]["PRIORITY"];
+ // I did most of the MIME stuff yesterday (June 20, 2000), but I couldn't
+ // figure out how to do this part, so I decided to go to bed. I woke up
+ // in the morning and had a flash of insight. I went to the white-board
+ // and scribbled it out, then spent a bit programming it, and this is the
+ // result. Nothing complicated, but I think my brain was fried yesterday.
+ // Funny how that happens some times.
+ //
+ // This gets properties in a nested parenthesisized list. For example,
+ // this would get passed something like: ("attachment" ("filename" "luke.tar.gz"))
+ // This returns an array called $props with all paired up properties.
+ // It ignores the "attachment" for now, maybe that should change later
+ // down the road. In this case, what is returned is:
+ // $props[0]["name"] = "filename";
+ // $props[0]["value"] = "luke.tar.gz";
+ function mime_get_props ($props, $structure) {
+ global $debug_mime;
+ while (strlen($structure) > 0) {
+ $structure = trim($structure);
+ $char = substr($structure, 0, 1);
+
+ if ($char == "\"") {
+ $pos = 1;
+ $char = substr($structure, $pos, 1);
+ while ($char != "\"" && $pos < strlen($structure)) {
+ $tmp .= $char;
+ $pos++;
+ $char = substr($structure, $pos, 1);
+ }
+ $structure = trim(substr($structure, strlen($tmp) + 2));
+ $char = substr($structure, 0, 1);
+
+ if ($char == "\"") {
+ $pos = 1;
+ $char = substr($structure, $pos, 1);
+ while ($char != "\"" && $pos < strlen($structure)) {
+ $value .= $char;
+ $pos++;
+ $char = substr($structure, $pos, 1);
+ }
+ $structure = trim(substr($structure, strlen($tmp) + 2));
+
+ $k = count($props);
+ $props[$k]["name"] = $tmp;
+ $props[$k]["value"] = $value;
+ } else if ($char == "(") {
+ $end = mime_match_parenthesis (0, $structure);
+ $sub = substr($structure, 1, $end-1);
+ $props = mime_get_props($props, $sub);
+ $structure = substr($structure, strlen($sub) + 2);
+ }
+ return $props;
+ } else if ($char == "(") {
+ $end = mime_match_parenthesis (0, $structure);
+ $sub = substr($structure, 1, $end-1);
+ $props = mime_get_props($props, $sub);
+ $structure = substr($structure, strlen($sub) + 2);
+ return $props;
+ } else {
+ return $props;
}
}
+ }
- for ($i = 0; $i < count($message["ENTITIES"]); $i++) {
- switch ($priority) {
- /** HTML **/
- case 20: for ($i=0; $i < count($message["ENTITIES"]); $i++) {
- if (($message["ENTITIES"][$i]["TYPE0"] == "text") && ($message["ENTITIES"][$i]["TYPE1"] == "html")) {
- $body = decodeBody($message["ENTITIES"][$i]["BODY"], $message["ENTITIES"][$i]["ENCODING"]);
- }
- }
- break;
- /** PLAIN **/
- case 10: for ($i=0; $i < count($message["ENTITIES"]); $i++) {
- if (($message["ENTITIES"][$i]["TYPE0"] == "text") && ($message["ENTITIES"][$i]["TYPE1"] == "plain")) {
- $body = decodeBody($message["ENTITIES"][$i]["BODY"], $message["ENTITIES"][$i]["ENCODING"]);
- }
- }
- break;
- /** UNKNOWN...SEND WHAT WE GOT **/
- case 1: for ($i=0; $i < count($message["ENTITIES"]); $i++) {
- if (($message["ENTITIES"][$i]["TYPE0"] == "text")) {
- $pos = count($body);
- for ($b=0; $b < count($message["ENTITIES"][$i]["BODY"]); $b++) {
- $pos = $pos + $b;
- $body[$pos] = $message["ENTITIES"][$i]["BODY"][$b];
- }
- }
- }
- break;
+ // Matches parenthesis. It will return the position of the matching
+ // parenthesis in $structure. For instance, if $structure was:
+ // ("text" "plain" ("val1name", "1") nil ... )
+ // x x
+ // then this would return 42 to match up those two.
+ function mime_match_parenthesis ($pos, $structure) {
+ $char = substr($structure, $pos, 1);
+
+ // ignore all extra characters
+ while ($pos < strlen($structure)) {
+ $pos++;
+ $char = substr($structure, $pos, 1);
+ if ($char == ")") {
+ return $pos;
+ } else if ($char == "(") {
+ $pos = mime_match_parenthesis ($pos, $structure);
}
}
+ }
+
+ function mime_fetch_body ($imap_stream, $id, $ent_id) {
+ // do a bit of error correction. If we couldn't find the entity id, just guess
+ // that it is the first one. That is usually the case anyway.
+ if (!$ent_id) $ent_id = 1;
+
+ fputs ($imap_stream, "a001 FETCH $id BODY[$ent_id]\r\n");
+ $topline = fgets ($imap_stream, 1024);
+ $size = substr ($topline, strpos($topline, "{")+1);
+ $size = substr ($size, 0, strpos($size, "}"));
+ $read = fread ($imap_stream, $size);
+ return $read;
+ }
+
+ /* -[ END MIME DECODING ]----------------------------------------------------------- */
+
+
+
+ /** This is the first function called. It decides if this is a multipart
+ message or if it should be handled as a single entity
+ **/
+ function decodeMime ($imap_stream, $body, $header) {
+ global $username, $key, $imapServerAddress, $imapPort;
+ return mime_structure ($imap_stream, $header);
+ }
+
+ // This is here for debugging purposese. It will print out a list
+ // of all the entity IDs that are in the $message object.
+ function listEntities ($message) {
+ if ($message) {
+ if ($message->header->entity_id)
+ echo "" . $message->header->entity_id . " : " . $message->header->type0 . "/" . $message->header->type1 . " ";
+ for ($i = 0; $message->entities[$i]; $i++) {
+ $msg = listEntities($message->entities[$i], $ent_id);
+ if ($msg)
+ return $msg;
+ }
+ }
+ }
+
+ // returns a $message object for a particular entity id
+ function getEntity ($message, $ent_id) {
+ if ($message) {
+ if ($message->header->entity_id == $ent_id && strlen($ent_id) == strlen($message->header->entity_id)) {
+ return $message;
+ } else {
+ for ($i = 0; $message->entities[$i]; $i++) {
+ $msg = getEntity ($message->entities[$i], $ent_id);
+ if ($msg)
+ return $msg;
+ }
+ }
+ }
+ }
+
+ // figures out what entity to display and returns the $message object
+ // for that entity.
+ function findDisplayEntity ($message) {
+ if ($message) {
+ if ($message->header->type0 == "text") {
+ if ($message->header->type1 == "plain" ||
+ $message->header->type1 == "html") {
+ return $message->header->entity_id;
+ }
+ } else {
+ for ($i=0; $message->entities[$i]; $i++) {
+ return findDisplayEntity($message->entities[$i]);
+ }
+ }
+ }
+ }
+
+ /** This returns a parsed string called $body. That string can then
+ be displayed as the actual message in the HTML. It contains
+ everything needed, including HTML Tags, Attachments at the
+ bottom, etc.
+ **/
+ function formatBody($imap_stream, $message, $color, $wrap_at) {
+ // this if statement checks for the entity to show as the
+ // primary message. To add more of them, just put them in the
+ // order that is their priority.
+ global $username, $key, $imapServerAddress, $imapPort;
+
+ $id = $message->header->id;
+ $urlmailbox = urlencode($message->header->mailbox);
+
+ // Get the right entity and redefine message to be this entity
+ $ent_num = findDisplayEntity ($message);
+ $body_message = getEntity($message, $ent_num);
+
+ $body = mime_fetch_body ($imap_stream, $id, $ent_num);
+ $body = decodeBody($body, $body_message->header->encoding);
+
+ // If there are other types that shouldn't be formatted, add
+ // them here
+ if ($message->header->type1 != "html") {
+ $body = translateText($body, $wrap_at, $body_message->header->charset);
+ }
+
+ $body .= "