122 lines
3.3 KiB
PHP
122 lines
3.3 KiB
PHP
<?php
|
|
|
|
/*
|
|
* This file is part of SwiftMailer.
|
|
* (c) 2004-2009 Chris Corbyn
|
|
*
|
|
* For the full copyright and license information, please view the LICENSE
|
|
* file that was distributed with this source code.
|
|
*/
|
|
|
|
/**
|
|
* Handles Quoted Printable (QP) Transfer Encoding in Swift Mailer using the PHP core function.
|
|
*
|
|
* @author Lars Strojny
|
|
*/
|
|
class Swift_Mime_ContentEncoder_NativeQpContentEncoder implements Swift_Mime_ContentEncoder
|
|
{
|
|
/**
|
|
* @var string|null
|
|
*/
|
|
private $charset;
|
|
|
|
/**
|
|
* @param string|null $charset
|
|
*/
|
|
public function __construct($charset = null)
|
|
{
|
|
$this->charset = $charset ?: 'utf-8';
|
|
}
|
|
|
|
/**
|
|
* Notify this observer that the entity's charset has changed.
|
|
*
|
|
* @param string $charset
|
|
*/
|
|
public function charsetChanged($charset)
|
|
{
|
|
$this->charset = $charset;
|
|
}
|
|
|
|
/**
|
|
* Encode $in to $out.
|
|
*
|
|
* @param Swift_OutputByteStream $os to read from
|
|
* @param Swift_InputByteStream $is to write to
|
|
* @param int $firstLineOffset
|
|
* @param int $maxLineLength 0 indicates the default length for this encoding
|
|
*
|
|
* @throws RuntimeException
|
|
*/
|
|
public function encodeByteStream(Swift_OutputByteStream $os, Swift_InputByteStream $is, $firstLineOffset = 0, $maxLineLength = 0)
|
|
{
|
|
if ('utf-8' !== $this->charset) {
|
|
throw new RuntimeException(sprintf('Charset "%s" not supported. NativeQpContentEncoder only supports "utf-8"', $this->charset));
|
|
}
|
|
|
|
$string = '';
|
|
|
|
while (false !== $bytes = $os->read(8192)) {
|
|
$string .= $bytes;
|
|
}
|
|
|
|
$is->write($this->encodeString($string));
|
|
}
|
|
|
|
/**
|
|
* Get the MIME name of this content encoding scheme.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function getName()
|
|
{
|
|
return 'quoted-printable';
|
|
}
|
|
|
|
/**
|
|
* Encode a given string to produce an encoded string.
|
|
*
|
|
* @param string $string
|
|
* @param int $firstLineOffset if first line needs to be shorter
|
|
* @param int $maxLineLength 0 indicates the default length for this encoding
|
|
*
|
|
* @throws RuntimeException
|
|
*
|
|
* @return string
|
|
*/
|
|
public function encodeString($string, $firstLineOffset = 0, $maxLineLength = 0)
|
|
{
|
|
if ('utf-8' !== $this->charset) {
|
|
throw new RuntimeException(sprintf('Charset "%s" not supported. NativeQpContentEncoder only supports "utf-8"', $this->charset));
|
|
}
|
|
|
|
return $this->standardize(quoted_printable_encode($string));
|
|
}
|
|
|
|
/**
|
|
* Make sure CRLF is correct and HT/SPACE are in valid places.
|
|
*
|
|
* @param string $string
|
|
*
|
|
* @return string
|
|
*/
|
|
protected function standardize($string)
|
|
{
|
|
// transform CR or LF to CRLF
|
|
$string = preg_replace('~=0D(?!=0A)|(?<!=0D)=0A~', '=0D=0A', $string);
|
|
// transform =0D=0A to CRLF
|
|
$string = str_replace(["\t=0D=0A", ' =0D=0A', '=0D=0A'], ["=09\r\n", "=20\r\n", "\r\n"], $string);
|
|
|
|
switch (\ord(substr($string, -1))) {
|
|
case 0x09:
|
|
$string = substr_replace($string, '=09', -1);
|
|
break;
|
|
case 0x20:
|
|
$string = substr_replace($string, '=20', -1);
|
|
break;
|
|
}
|
|
|
|
return $string;
|
|
}
|
|
}
|