135 lines
4.1 KiB
PHP
135 lines
4.1 KiB
PHP
<?php
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/*
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* This file is part of SwiftMailer.
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* (c) 2004-2009 Chris Corbyn
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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/**
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* Handles Quoted Printable (QP) Transfer Encoding in Swift Mailer.
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*
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* @author Chris Corbyn
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*/
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class Swift_Mime_ContentEncoder_QpContentEncoder extends Swift_Encoder_QpEncoder implements Swift_Mime_ContentEncoder
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{
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protected $dotEscape;
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/**
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* Creates a new QpContentEncoder for the given CharacterStream.
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*
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* @param Swift_CharacterStream $charStream to use for reading characters
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* @param Swift_StreamFilter $filter if canonicalization should occur
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* @param bool $dotEscape if dot stuffing workaround must be enabled
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*/
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public function __construct(Swift_CharacterStream $charStream, Swift_StreamFilter $filter = null, $dotEscape = false)
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{
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$this->dotEscape = $dotEscape;
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parent::__construct($charStream, $filter);
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}
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public function __sleep()
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{
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return ['charStream', 'filter', 'dotEscape'];
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}
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protected function getSafeMapShareId()
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{
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return static::class.($this->dotEscape ? '.dotEscape' : '');
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}
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protected function initSafeMap()
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{
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parent::initSafeMap();
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if ($this->dotEscape) {
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/* Encode . as =2e for buggy remote servers */
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unset($this->safeMap[0x2e]);
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}
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}
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/**
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* Encode stream $in to stream $out.
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*
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* QP encoded strings have a maximum line length of 76 characters.
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* If the first line needs to be shorter, indicate the difference with
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* $firstLineOffset.
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*
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* @param Swift_OutputByteStream $os output stream
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* @param Swift_InputByteStream $is input stream
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* @param int $firstLineOffset
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* @param int $maxLineLength
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*/
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public function encodeByteStream(Swift_OutputByteStream $os, Swift_InputByteStream $is, $firstLineOffset = 0, $maxLineLength = 0)
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{
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if ($maxLineLength > 76 || $maxLineLength <= 0) {
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$maxLineLength = 76;
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}
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$thisLineLength = $maxLineLength - $firstLineOffset;
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$this->charStream->flushContents();
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$this->charStream->importByteStream($os);
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$currentLine = '';
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$prepend = '';
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$size = $lineLen = 0;
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while (false !== $bytes = $this->nextSequence()) {
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// If we're filtering the input
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if (isset($this->filter)) {
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// If we can't filter because we need more bytes
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while ($this->filter->shouldBuffer($bytes)) {
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// Then collect bytes into the buffer
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if (false === $moreBytes = $this->nextSequence(1)) {
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break;
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}
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foreach ($moreBytes as $b) {
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$bytes[] = $b;
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}
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}
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// And filter them
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$bytes = $this->filter->filter($bytes);
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}
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$enc = $this->encodeByteSequence($bytes, $size);
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$i = strpos($enc, '=0D=0A');
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$newLineLength = $lineLen + (false === $i ? $size : $i);
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if ($currentLine && $newLineLength >= $thisLineLength) {
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$is->write($prepend.$this->standardize($currentLine));
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$currentLine = '';
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$prepend = "=\r\n";
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$thisLineLength = $maxLineLength;
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$lineLen = 0;
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}
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$currentLine .= $enc;
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if (false === $i) {
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$lineLen += $size;
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} else {
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// 6 is the length of '=0D=0A'.
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$lineLen = $size - strrpos($enc, '=0D=0A') - 6;
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}
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}
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if (\strlen($currentLine)) {
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$is->write($prepend.$this->standardize($currentLine));
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}
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}
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/**
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* Get the name of this encoding scheme.
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* Returns the string 'quoted-printable'.
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*
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* @return string
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*/
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public function getName()
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{
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return 'quoted-printable';
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}
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}
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