| ';text';, ';text'; => TYPETEXT,
TYPEMULTIPART => ';multipart';, ';multipart'; => TYPEMULTIPART,
TYPEMESSAGE => ';message';, ';message'; => TYPEMESSAGE,
TYPEAPPLICATION => ';application';, ';application'; => TYPEAPPLICATION,
TYPEAUDIO => ';audio';, ';audio'; => TYPEAUDIO,
TYPEIMAGE => ';image';, ';image'; => TYPEIMAGE,
TYPEVIDEO => ';video';, ';video'; => TYPEVIDEO,
TYPEOTHER => ';unknown';, ';unknown'; => TYPEOTHER
);
$mime_encodings =
array(
ENC7BIT => ';7bit';, ';7bit'; => ENC7BIT,
ENC8BIT => ';8bit';, ';8bit'; => ENC8BIT,
ENCBINARY => ';binary';, ';binary'; => ENCBINARY,
ENCBASE64 => ';base64';, ';base64'; => ENCBASE64,
ENCQUOTEDPRINTABLE => ';quoted-printable';, ';quoted-printable'; => ENCQUOTEDPRINTABLE,
ENCOTHER => ';unknown';, ';unknown'; => ENCOTHER
);
/**
* The MIME:: class provides methods for dealing with MIME standards.
*
* @author Chuck Hagenbuch
* @version $Revision: 1.64 $
* @since Horde 1.3
* @package horde.mime
*/
class MIME {
/**
* Determine if a string contains 8-bit characters.
* @access private
*
* @param string $string The string to check.
* @return boolean true if it does, false if it doesn';t.
*/
function is8bit($string)
{
if (is_string($string)) {
for ($i = 0; $i < strlen($string); $i++) {
if (ord($string[$i]) >> 7)
return true;
}
return false;
}
return false;
}
/**
* Encode a string containing non-ascii characters according to RFC 2047.
*
* @param string $text The text to encode.
* @param string $charset (optional) The character set of the text.
* @param boolean $outer Is this the final iteration?
*
* @return string The text, encoded only if it contains non-ascii characters.
*/
function encode($text, $charset = null, $outer = true)
{
if (MIME::is8bit($text)) {
if (((strlen($text) * 3) + strlen($charset) + 7) > 76) {
$text = MIME::encode(substr($text, 0, (23 - strlen($charset))), $charset) . MIME::encode(substr($text, (23 - strlen($charset))), $charset, false);
} else {
$text = "=?$charset?B?" . strtr(trim(base64_encode($text)), '; ';, ';_';) . "?=\n\t";
}
}
// if this is the final iteration, take off any trailing
// newline/tab chars.
if ($outer && (substr($text, -2) == "\n\t"))
$text = substr($text, 0, -2);
return $text;
}
/**
* Encode a string containing email addresses according to RFC 2047.
*
* This differs from MIME::encode() because it keeps email
* addresses legal, only encoding the personal information.
*
* @param string $text The email addresses to encode.
* @param string $charset (optional) The character set of the text.
* @param string $defserver (optional) The default domain to append to mailboxes.
*
* @return string The text, encoded only if it contains non-ascii characters.
*/
function encodeAddress($text, $charset = null, $defserver = null)
{
include_once ';Mail/RFC822.php';;
$addr_arr = Mail_RFC822::parseAddressList($text, $defserver, false, false);
$text = ';';;
if (is_array($addr_arr)) {
foreach ($addr_arr as $addr) {
if (empty($addr->personal)) {
$personal = ';';;
} else {
if ((substr($addr->personal, 0, 1) == ';"';) &&
(substr($addr->personal, -1) == ';"';)) {
$addr->personal = substr($addr->personal, 1, -1);
}
$personal = MIME::encode($addr->personal, $charset);
}
if (strlen($text) != 0) $text .= ';, ';;
// FIXME: dependency on imap module
$text .= MIME::trimEmailAddress(imap_rfc822_write_address($addr->mailbox, $addr->host, $personal));
}
}
return $text;
}
/**
* Decode an RFC 2047-encoded string.
*
* @param string $string The text to decode.
* @return string The decoded text, or the original string if it was not encoded.
*/
function decode($string)
{
$pos = strpos($string, ';=?';);
if ($pos === false) {
return $string;
}
// take out any spaces between multiple encoded words
$string = preg_replace(';|\?=\s=\?|';, ';?==?';, $string);
$preceding = substr($string, 0, $pos); // save any preceding text
$search = substr($string, $pos + 2, 75); // the mime header spec says this is the longest a single encoded word can be
$d1 = strpos($search, ';?';);
if (!is_int($d1)) {
return $string;
}
$charset = substr($string, $pos + 2, $d1);
$search = substr($search, $d1 + 1);
$d2 = strpos($search, ';?';);
if (!is_int($d2)) {
return $string;
}
$encoding = substr($search, 0, $d2);
$search = substr($search, $d2+1);
$end = strpos($search, ';?=';);
if (!is_int($end)) {
return $string;
}
$encoded_text = substr($search, 0, $end);
$rest = substr($string, (strlen($preceding . $charset . $encoding . $encoded_text) + 6));
switch ($encoding) {
case ';Q';:
case ';q';:
$encoded_text = str_replace(';_';, ';%20';, $encoded_text);
$encoded_text = str_replace(';=';, ';%';, $encoded_text);
$decoded = urldecode($encoded_text);
/* Convert Cyrillic character sets. */
if (stristr($GLOBALS[';registry';]->getCharset(), ';windows-1251';)) {
if (stristr($charset, ';koi8-r';)) {
$decoded = convert_cyr_string($decoded, ';k';, ';w';);
}
}
if (stristr($GLOBALS[';registry';]->getCharset(), ';koi8-r';)) {
if (stristr($charset, ';windows-1251';)) {
$decoded = convert_cyr_string($decoded, ';w';, ';k';);
}
}
break;
case ';B';:
case ';b';:
$decoded = urldecode(base64_decode($encoded_text));
if (stristr($GLOBALS[';registry';]->getCharset(), ';windows-1251';)) {
if (stristr($charset, ';koi8-r';)) {
$decoded = convert_cyr_string($decoded, ';k';, ';w';);
}
}
if (stristr($GLOBALS[';registry';]->getCharset(), ';koi8-r';)) {
if (stristr($charset, ';windows-1251';)) {
$decoded = convert_cyr_string($decoded, ';w';, ';k';);
}
}
break;
default:
$decoded = ';=?'; . $charset . ';?'; . $encoding . ';?'; . $encoded_text . ';?=';;
break;
}
return $preceding . $decoded . MIME::decode($rest);
}
/**
* If an email address has no personal information, get rid of any
* angle brackets (<>) around it.
*
* @param string $address The address to trim.
* @return string The trimmed address.
*/
function trimEmailAddress($address)
{
$address = trim($address);
if ((substr($address, 0, 1) == ';<';) && (substr($address, -1) == ';>';)) {
$address = substr($address, 1, -1);
}
return $address;
}
}
?>
|
