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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Mime
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id$
*/
/**
* @see Zend_Mime
*/
/**
* @category Zend
* @package Zend_Mime
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Mime_Decode
{
/**
* Explode MIME multipart string into seperate parts
*
* Parts consist of the header and the body of each MIME part.
*
* @param string $body raw body of message
* @param string $boundary boundary as found in content-type
* @return array parts with content of each part, empty if no parts found
* @throws Zend_Exception
*/
public static function splitMime($body, $boundary)
{
// TODO: we're ignoring \r for now - is this function fast enough and is it safe to asume noone needs \r?
$body = str_replace("\r", '', $body);
$start = 0;
$res = array();
// find every mime part limiter and cut out the
// string before it.
// the part before the first boundary string is discarded:
$p = strpos($body, '--' . $boundary . "\n", $start);
if ($p === false) {
// no parts found!
return array();
}
// position after first boundary line
$start = $p + 3 + strlen($boundary);
while (($p = strpos($body, '--' . $boundary . "\n", $start)) !== false) {
$res[] = substr($body, $start, $p-$start);
$start = $p + 3 + strlen($boundary);
}
// no more parts, find end boundary
$p = strpos($body, '--' . $boundary . '--', $start);
if ($p === false) {
throw new Zend_Exception('Not a valid Mime Message: End Missing');
}
// the remaining part also needs to be parsed:
$res[] = substr($body, $start, $p - $start);
return $res;
}
/**
* decodes a mime encoded String and returns a
* struct of parts with header and body
*
* @param string $message raw message content
* @param string $boundary boundary as found in content-type
* @param string $EOL EOL string; defaults to {@link Zend_Mime::LINEEND}
* @return array|null parts as array('header' => array(name => value), 'body' => content), null if no parts found
* @throws Zend_Exception
*/
public static function splitMessageStruct(
$message, $boundary, $EOL = Zend_Mime::LINEEND
)
{
$parts = self::splitMime($message, $boundary);
if (count($parts) <= 0) {
return null;
}
$result = array();
foreach ($parts as $part) {
self::splitMessage($part, $headers, $body, $EOL);
$result[] = array(
'header' => $headers,
'body' => $body
);
}
return $result;
}
/**
* split a message in header and body part, if no header or an
* invalid header is found $headers is empty
*
* The charset of the returned headers depend on your iconv settings.
*
* @param string $message raw message with header and optional content
* @param array $headers output param, array with headers as array(name => value)
* @param string $body output param, content of message
* @param string $EOL EOL string; defaults to {@link Zend_Mime::LINEEND}
* @return null
*/
public static function splitMessage(
$message, &$headers, &$body, $EOL = Zend_Mime::LINEEND
)
{
// check for valid header at first line
$firstline = strtok($message, "\n");
if (!preg_match('%^[^\s]+[^:]*:%', $firstline)) {
$headers = array();
// TODO: we're ignoring \r for now - is this function fast enough and is it safe to asume noone needs \r?
$body = str_replace(
array(
"\r",
"\n"
), array(
'',
$EOL
), $message
);
return;
}
// find an empty line between headers and body
// default is set new line
if (strpos($message, $EOL . $EOL)) {
list($headers, $body) = explode($EOL . $EOL, $message, 2);
// next is the standard new line
} else {
if ($EOL != "\r\n" && strpos($message, "\r\n\r\n")) {
list($headers, $body) = explode("\r\n\r\n", $message, 2);
// next is the other "standard" new line
} else {
if ($EOL != "\n" && strpos($message, "\n\n")) {
list($headers, $body) = explode("\n\n", $message, 2);
// at last resort find anything that looks like a new line
} else {
@list($headers, $body) =
@preg_split("%([\r\n]+)\\1%U", $message, 2);
}
}
}
$headers = iconv_mime_decode_headers(
$headers, ICONV_MIME_DECODE_CONTINUE_ON_ERROR
);
if ($headers === false) {
// an error occurs during the decoding
return;
}
// normalize header names
foreach ($headers as $name => $header) {
$lower = strtolower($name);
if ($lower == $name) {
continue;
}
unset($headers[$name]);
if (!isset($headers[$lower])) {
$headers[$lower] = $header;
continue;
}
if (is_array($headers[$lower])) {
$headers[$lower][] = $header;
continue;
}
$headers[$lower] = array(
$headers[$lower],
$header
);
}
}
/**
* split a content type in its different parts
*
* @param string $type content-type
* @param string $wantedPart the wanted part, else an array with all parts is returned
* @return string|array wanted part or all parts as array('type' => content-type, partname => value)
*/
public static function splitContentType($type, $wantedPart = null)
{
return self::splitHeaderField($type, $wantedPart, 'type');
}
/**
* split a header field like content type in its different parts
*
* @param string $field
* @param string $wantedPart the wanted part, else an array with all parts is returned
* @param int|string $firstName key name for the first part
* @throws Zend_Exception
* @return string|array wanted part or all parts as array($firstName => firstPart, partname => value)
*/
public static function splitHeaderField(
$field, $wantedPart = null, $firstName = 0
)
{
$wantedPart = strtolower($wantedPart);
$firstName = strtolower($firstName);
// special case - a bit optimized
if ($firstName === $wantedPart) {
$field = strtok($field, ';');
return $field[0] == '"' ? substr($field, 1, -1) : $field;
}
$field = $firstName . '=' . $field;
if (!preg_match_all('%([^=\s]+)\s*=\s*("[^"]+"|[^;]+)(;\s*|$)%', $field, $matches)) {
throw new Zend_Exception('not a valid header field');
}
if ($wantedPart) {
foreach ($matches[1] as $key => $name) {
if (strcasecmp($name, $wantedPart)) {
continue;
}
if ($matches[2][$key][0] != '"') {
return $matches[2][$key];
}
return substr($matches[2][$key], 1, -1);
}
return null;
}
$split = array();
foreach ($matches[1] as $key => $name) {
$name = strtolower($name);
if ($matches[2][$key][0] == '"') {
$split[$name] = substr($matches[2][$key], 1, -1);
} else {
$split[$name] = $matches[2][$key];
}
}
return $split;
}
/**
* decode a quoted printable encoded string
*
* The charset of the returned string depends on your iconv settings.
*
* @param string $string Encoded string
* @return string Decoded string
*/
public static function decodeQuotedPrintable($string)
{
return quoted_printable_decode($string);
}
}
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