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, $header) {
sqimap_messages_flag ($imap_stream, $header->id, $header->id, 'Seen');
$ssid = sqimap_session_id();
$lsid = strlen( $ssid );
$id = $header->id;
fputs ($imap_stream, "$ssid FETCH $id BODYSTRUCTURE\r\n");
//
// This should use sqimap_read_data instead of reading it itself
//
$read = fgets ($imap_stream, 9216);
$bodystructure = '';
while ( substr($read, 0, $lsid) <> $ssid &&
!feof( $imap_stream ) ) {
$bodystructure .= $read;
$read = fgets ($imap_stream, 9216);
}
$read = $bodystructure;
// isolate the body structure and remove beginning and end parenthesis
$read = trim(substr ($read, strpos(strtolower($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);
}
$msg = mime_parse_structure ($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) {
$msg = new message();
if ($structure{0} == '(') {
$ent_id = mime_new_element_level($ent_id);
$start = $end = -1;
do {
$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 ($structure{$end+1} == '(');
} else {
// parse the elements
$msg = mime_get_element ($structure, $msg, $ent_id);
}
return $msg;
}
/* Increments the element ID. An element id can look like any of
* the following: 1, 1.2, 4.3.2.4.1, etc. This function increments
* the last number of the element id, changing 1.2 to 1.3.
*/
function mime_increment_id ($id) {
if (strpos($id, '.')) {
$first = substr($id, 0, strrpos($id, '.'));
$last = substr($id, strrpos($id, '.')+1);
$last++;
$new = $first . '.' .$last;
} else {
$new = $id + 1;
}
return $new;
}
/*
* See comment for mime_increment_id().
* This adds another level on to the entity_id changing 1.3 to 1.3.0
* NOTE: 1.3.0 is not a valid element ID. It MUST be incremented
* before it can be used. I left it this way so as not to have
* to make a special case if it is the first entity_id. It
* always increments it, and that works fine.
*/
function mime_new_element_level ($id) {
if (!$id) {
$id = 0;
} else {
$id = $id . '.0';
}
return( $id );
}
function mime_get_element (&$structure, $msg, $ent_id) {
$elem_num = 1;
$msg->header = new msg_header();
$msg->header->entity_id = $ent_id;
$properties = array();
while (strlen($structure) > 0) {
$structure = trim($structure);
$char = $structure{0};
if (strtolower(substr($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;
$text = '';
while ( ($char = $structure{$pos} ) <> '"' && $pos < strlen($structure)) {
$text .= $char;
$pos++;
}
$structure = substr($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 {
// loop through until we find a space or an end parenthesis
$pos = 0;
$char = $structure{$pos};
$text = '';
while ($char != ' ' && $char != ')' && $pos < strlen($structure)) {
$text .= $char;
$pos++;
$char = $structure{$pos};
}
$structure = substr($structure, strlen($text));
}
// This is where all the text parts get put into the header
switch ($elem_num) {
case 1:
$msg->header->type0 = strtolower($text);
break;
case 2:
$msg->header->type1 = strtolower($text);
break;
case 4: // Id
// Invisimail enclose images with <>
$msg->header->id = str_replace( '<', '', str_replace( '>', '', $text ) );
break;
case 5:
$msg->header->description = $text;
break;
case 6:
$msg->header->encoding = strtolower($text);
break;
case 7:
$msg->header->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 = $text;
} else if ($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 ( $structure{0} == '(' ) {
$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'];
}
}
return $msg;
}
/*
* 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, $structure) {
while (strlen($structure) > 0) {
$structure = trim($structure);
$char = $structure{0};
if ($char == '"') {
$pos = 1;
$tmp = '';
while ( ( $char = $structure{$pos} ) != '"' &&
$pos < strlen($structure)) {
$tmp .= $char;
$pos++;
}
$structure = trim(substr($structure, strlen($tmp) + 2));
$char = $structure{0};
if ($char == '"') {
$pos = 1;
$value = '';
while ( ( $char = $structure{$pos} ) != '"' &&
$pos < strlen($structure) ) {
$value .= $char;
$pos++;
}
$structure = trim(substr($structure, strlen($tmp) + 2));
$k = count($props);
$props[$k]['name'] = strtolower($tmp);
$props[$k]['value'] = $value;
} else if ($char == '(') {
$end = mime_match_parenthesis (0, $structure);
$sub = substr($structure, 1, $end-1);
if (! isset($props))
$props = array();
$props = mime_get_props($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;
}
}
}
/*
* 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) {
$j = strlen( $structure );
// ignore all extra characters
// If inside of a string, skip string -- Boundary IDs and other
// things can have ) in them.
if ( $structure{$pos} != '(' ) {
return( $j );
}
while ( $pos < $j ) {
$pos++;
if ($structure{$pos} == ')') {
return $pos;
} elseif ($structure{$pos} == '"') {
$pos++;
while ( $structure{$pos} != '"' &&
$pos < $j ) {
if (substr($structure, $pos, 2) == '\\"') {
$pos++;
} elseif (substr($structure, $pos, 2) == '\\\\') {
$pos++;
}
$pos++;
}
} elseif ( $structure{$pos} == '(' ) {
$pos = mime_match_parenthesis ($pos, $structure);
}
}
echo _("Error decoding mime structure. Report this as a bug!") . '
';
return( $pos );
}
function mime_fetch_body($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;
}
$cmd = "FETCH $id BODY[$ent_id]";
$data = sqimap_run_command ($imap_stream, $cmd, true, $response, $message);
do {
$topline = array_shift( $data );
} while( $topline && $topline == '*' && !preg_match( '/\\* [0-9] FETCH.*/i', $topline )) ;
$wholemessage = implode('', $data);
if (ereg('\\{([^\\}]*)\\}', $topline, $regs)) {
$ret = substr( $wholemessage, 0, $regs[1] );
/*
There is some information in the content info header that could be important
in order to parse html messages. Let's get them here.
*/
if ( $ret{0} == '<' ) {
$data = sqimap_run_command ($imap_stream, "FETCH $id BODY[$ent_id.MIME]", true, $response, $message);
$base = '';
$k = 10;
foreach( $data as $d ) {
if ( substr( $d, 0, 13 ) == 'Content-Base:' ) {
$j = strlen( $d );
$i = 13;
$base = '';
while ( $i < $j &&
( !isNoSep( $d{$i} ) || $d{$i} == '"' ) )
$i++;
while ( $i < $j ) {
if ( isNoSep( $d{$i} ) )
$base .= $d{$i};
$i++;
}
$k = 0;
} elseif ( $k == 1 && !isnosep( $d{0} ) ) {
$base .= substr( $d, 1 );
}
$k++;
}
if ( $base <> '' ) {
$ret = "
' .
'' .
' ' .
'' .
_("Body retrieval error. The reason for this is most probably that the message is malformed. Please help us making future versions better by submitting this message to the developers knowledgebase!") .
"
" .
_("Submit message") . '
' .
'' . _("Command:") . " $cmd " .
'' . _("Response:") . " $response " .
'' . _("Message:") . " $message " .
'' . _("FETCH line:") . " $topline " .
"
\n" . _("Attachments") . ':' . " |
---|
\n" .
" |