<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Mime;
/**
* Support class for MultiPart Mime Messages
*/
class Mime
{
const TYPE_OCTETSTREAM = 'application/octet-stream';
const TYPE_TEXT = 'text/plain';
const TYPE_HTML = 'text/html';
const ENCODING_7BIT = '7bit';
const ENCODING_8BIT = '8bit';
const ENCODING_QUOTEDPRINTABLE = 'quoted-printable';
const ENCODING_BASE64 = 'base64';
const DISPOSITION_ATTACHMENT = 'attachment';
const DISPOSITION_INLINE = 'inline';
const LINELENGTH = 72;
const LINEEND = "\n";
const MULTIPART_ALTERNATIVE = 'multipart/alternative';
const MULTIPART_MIXED = 'multipart/mixed';
const MULTIPART_RELATED = 'multipart/related';
protected $boundary;
protected static $makeUnique = 0;
// lookup-Tables for QuotedPrintable
public static $qpKeys = array(
"\x00","\x01","\x02","\x03","\x04","\x05","\x06","\x07",
"\x08","\x09","\x0A","\x0B","\x0C","\x0D","\x0E","\x0F",
"\x10","\x11","\x12","\x13","\x14","\x15","\x16","\x17",
"\x18","\x19","\x1A","\x1B","\x1C","\x1D","\x1E","\x1F",
"\x7F","\x80","\x81","\x82","\x83","\x84","\x85","\x86",
"\x87","\x88","\x89","\x8A","\x8B","\x8C","\x8D","\x8E",
"\x8F","\x90","\x91","\x92","\x93","\x94","\x95","\x96",
"\x97","\x98","\x99","\x9A","\x9B","\x9C","\x9D","\x9E",
"\x9F","\xA0","\xA1","\xA2","\xA3","\xA4","\xA5","\xA6",
"\xA7","\xA8","\xA9","\xAA","\xAB","\xAC","\xAD","\xAE",
"\xAF","\xB0","\xB1","\xB2","\xB3","\xB4","\xB5","\xB6",
"\xB7","\xB8","\xB9","\xBA","\xBB","\xBC","\xBD","\xBE",
"\xBF","\xC0","\xC1","\xC2","\xC3","\xC4","\xC5","\xC6",
"\xC7","\xC8","\xC9","\xCA","\xCB","\xCC","\xCD","\xCE",
"\xCF","\xD0","\xD1","\xD2","\xD3","\xD4","\xD5","\xD6",
"\xD7","\xD8","\xD9","\xDA","\xDB","\xDC","\xDD","\xDE",
"\xDF","\xE0","\xE1","\xE2","\xE3","\xE4","\xE5","\xE6",
"\xE7","\xE8","\xE9","\xEA","\xEB","\xEC","\xED","\xEE",
"\xEF","\xF0","\xF1","\xF2","\xF3","\xF4","\xF5","\xF6",
"\xF7","\xF8","\xF9","\xFA","\xFB","\xFC","\xFD","\xFE",
"\xFF"
);
public static $qpReplaceValues = array(
"=00","=01","=02","=03","=04","=05","=06","=07",
"=08","=09","=0A","=0B","=0C","=0D","=0E","=0F",
"=10","=11","=12","=13","=14","=15","=16","=17",
"=18","=19","=1A","=1B","=1C","=1D","=1E","=1F",
"=7F","=80","=81","=82","=83","=84","=85","=86",
"=87","=88","=89","=8A","=8B","=8C","=8D","=8E",
"=8F","=90","=91","=92","=93","=94","=95","=96",
"=97","=98","=99","=9A","=9B","=9C","=9D","=9E",
"=9F","=A0","=A1","=A2","=A3","=A4","=A5","=A6",
"=A7","=A8","=A9","=AA","=AB","=AC","=AD","=AE",
"=AF","=B0","=B1","=B2","=B3","=B4","=B5","=B6",
"=B7","=B8","=B9","=BA","=BB","=BC","=BD","=BE",
"=BF","=C0","=C1","=C2","=C3","=C4","=C5","=C6",
"=C7","=C8","=C9","=CA","=CB","=CC","=CD","=CE",
"=CF","=D0","=D1","=D2","=D3","=D4","=D5","=D6",
"=D7","=D8","=D9","=DA","=DB","=DC","=DD","=DE",
"=DF","=E0","=E1","=E2","=E3","=E4","=E5","=E6",
"=E7","=E8","=E9","=EA","=EB","=EC","=ED","=EE",
"=EF","=F0","=F1","=F2","=F3","=F4","=F5","=F6",
"=F7","=F8","=F9","=FA","=FB","=FC","=FD","=FE",
"=FF"
);
public static $qpKeysString =
"\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C\x0D\x0E\x0F\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1A\x1B\x1C\x1D\x1E\x1F\x7F\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8A\x8B\x8C\x8D\x8E\x8F\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9A\x9B\x9C\x9D\x9E\x9F\xA0\xA1\xA2\xA3\xA4\xA5\xA6\xA7\xA8\xA9\xAA\xAB\xAC\xAD\xAE\xAF\xB0\xB1\xB2\xB3\xB4\xB5\xB6\xB7\xB8\xB9\xBA\xBB\xBC\xBD\xBE\xBF\xC0\xC1\xC2\xC3\xC4\xC5\xC6\xC7\xC8\xC9\xCA\xCB\xCC\xCD\xCE\xCF\xD0\xD1\xD2\xD3\xD4\xD5\xD6\xD7\xD8\xD9\xDA\xDB\xDC\xDD\xDE\xDF\xE0\xE1\xE2\xE3\xE4\xE5\xE6\xE7\xE8\xE9\xEA\xEB\xEC\xED\xEE\xEF\xF0\xF1\xF2\xF3\xF4\xF5\xF6\xF7\xF8\xF9\xFA\xFB\xFC\xFD\xFE\xFF";
/**
* Check if the given string is "printable"
*
* Checks that a string contains no unprintable characters. If this returns
* false, encode the string for secure delivery.
*
* @param string $str
* @return bool
*/
public static function isPrintable($str)
{
return (strcspn($str, static::$qpKeysString) == strlen($str));
}
/**
* Encode a given string with the QUOTED_PRINTABLE mechanism and wrap the lines.
*
* @param string $str
* @param int $lineLength Defaults to {@link LINELENGTH}
* @param string $lineEnd Defaults to {@link LINEEND}
* @return string
*/
public static function encodeQuotedPrintable($str,
$lineLength = self::LINELENGTH,
$lineEnd = self::LINEEND)
{
$out = '';
$str = self::_encodeQuotedPrintable($str);
// Split encoded text into separate lines
while ($str) {
$ptr = strlen($str);
if ($ptr > $lineLength) {
$ptr = $lineLength;
}
// Ensure we are not splitting across an encoded character
$pos = strrpos(substr($str, 0, $ptr), '=');
if ($pos !== false && $pos >= $ptr - 2) {
$ptr = $pos;
}
// Check if there is a space at the end of the line and rewind
if ($ptr > 0 && $str[$ptr - 1] == ' ') {
--$ptr;
}
// Add string and continue
$out .= substr($str, 0, $ptr) . '=' . $lineEnd;
$str = substr($str, $ptr);
}
$out = rtrim($out, $lineEnd);
$out = rtrim($out, '=');
return $out;
}
/**
* Converts a string into quoted printable format.
*
* @param string $str
* @return string
*/
private static function _encodeQuotedPrintable($str)
{
$str = str_replace('=', '=3D', $str);
$str = str_replace(static::$qpKeys, static::$qpReplaceValues, $str);
$str = rtrim($str);
return $str;
}
/**
* Encode a given string with the QUOTED_PRINTABLE mechanism for Mail Headers.
*
* Mail headers depend on an extended quoted printable algorithm otherwise
* a range of bugs can occur.
*
* @param string $str
* @param string $charset
* @param int $lineLength Defaults to {@link LINELENGTH}
* @param string $lineEnd Defaults to {@link LINEEND}
* @return string
*/
public static function encodeQuotedPrintableHeader($str, $charset,
$lineLength = self::LINELENGTH,
$lineEnd = self::LINEEND)
{
// Reduce line-length by the length of the required delimiter, charsets and encoding
$prefix = sprintf('=?%s?Q?', $charset);
$lineLength = $lineLength-strlen($prefix)-3;
$str = self::_encodeQuotedPrintable($str);
// Mail-Header required chars have to be encoded also:
$str = str_replace(array('?', ' ', '_'), array('=3F', '=20', '=5F'), $str);
// initialize first line, we need it anyways
$lines = array(0 => "");
// Split encoded text into separate lines
$tmp = "";
while (strlen($str) > 0) {
$currentLine = max(count($lines)-1, 0);
$token = static::getNextQuotedPrintableToken($str);
$str = substr($str, strlen($token));
$tmp .= $token;
if ($token == '=20') {
// only if we have a single char token or space, we can append the
// tempstring it to the current line or start a new line if necessary.
if (strlen($lines[$currentLine] . $tmp) > $lineLength) {
$lines[$currentLine+1] = $tmp;
} else {
$lines[$currentLine] .= $tmp;
}
$tmp = "";
}
// don't forget to append the rest to the last line
if (strlen($str) == 0) {
$lines[$currentLine] .= $tmp;
}
}
// assemble the lines together by pre- and appending delimiters, charset, encoding.
for ($i = 0, $count = count($lines); $i < $count; $i++) {
$lines[$i] = " " . $prefix . $lines[$i] . "?=";
}
$str = trim(implode($lineEnd, $lines));
return $str;
}
/**
* Retrieves the first token from a quoted printable string.
*
* @param string $str
* @return string
*/
private static function getNextQuotedPrintableToken($str)
{
if (substr($str, 0, 1) == "=") {
$token = substr($str, 0, 3);
} else {
$token = substr($str, 0, 1);
}
return $token;
}
/**
* Encode a given string in mail header compatible base64 encoding.
*
* @param string $str
* @param string $charset
* @param int $lineLength Defaults to {@link LINELENGTH}
* @param string $lineEnd Defaults to {@link LINEEND}
* @return string
*/
public static function encodeBase64Header($str,
$charset,
$lineLength = self::LINELENGTH,
$lineEnd = self::LINEEND)
{
$prefix = '=?' . $charset . '?B?';
$suffix = '?=';
$remainingLength = $lineLength - strlen($prefix) - strlen($suffix);
$encodedValue = static::encodeBase64($str, $remainingLength, $lineEnd);
$encodedValue = str_replace($lineEnd, $suffix . $lineEnd . ' ' . $prefix, $encodedValue);
$encodedValue = $prefix . $encodedValue . $suffix;
return $encodedValue;
}
/**
* Encode a given string in base64 encoding and break lines
* according to the maximum linelength.
*
* @param string $str
* @param int $lineLength Defaults to {@link LINELENGTH}
* @param string $lineEnd Defaults to {@link LINEEND}
* @return string
*/
public static function encodeBase64($str,
$lineLength = self::LINELENGTH,
$lineEnd = self::LINEEND)
{
return rtrim(chunk_split(base64_encode($str), $lineLength, $lineEnd));
}
/**
* Constructor
*
* @param null|string $boundary
* @access public
*/
public function __construct($boundary = null)
{
// This string needs to be somewhat unique
if ($boundary === null) {
$this->boundary = '=_' . md5(microtime(1) . static::$makeUnique++);
} else {
$this->boundary = $boundary;
}
}
/**
* Encode the given string with the given encoding.
*
* @param string $str
* @param string $encoding
* @param string $EOL EOL string; defaults to {@link LINEEND}
* @return string
*/
public static function encode($str, $encoding, $EOL = self::LINEEND)
{
switch ($encoding) {
case self::ENCODING_BASE64:
return static::encodeBase64($str, self::LINELENGTH, $EOL);
case self::ENCODING_QUOTEDPRINTABLE:
return static::encodeQuotedPrintable($str, self::LINELENGTH, $EOL);
default:
/**
* @todo 7Bit and 8Bit is currently handled the same way.
*/
return $str;
}
}
/**
* Return a MIME boundary
*
* @access public
* @return string
*/
public function boundary()
{
return $this->boundary;
}
/**
* Return a MIME boundary line
*
* @param string $EOL Defaults to {@link LINEEND}
* @access public
* @return string
*/
public function boundaryLine($EOL = self::LINEEND)
{
return $EOL . '--' . $this->boundary . $EOL;
}
/**
* Return MIME ending
*
* @param string $EOL Defaults to {@link LINEEND}
* @access public
* @return string
*/
public function mimeEnd($EOL = self::LINEEND)
{
return $EOL . '--' . $this->boundary . '--' . $EOL;
}
}