92 lines
2.5 KiB
PHP
92 lines
2.5 KiB
PHP
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<?php
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/*
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The Base 64 transfer encoder in Swift Mailer.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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//@require 'Swift/Mime/ContentEncoder.php';
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//@require 'Swift/Encoder/Base64Encoder.php';
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//@require 'Swift/InputByteStream.php';
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//@require 'Swift/OutputByteStream.php';
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/**
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* Handles Base 64 Transfer Encoding in Swift Mailer.
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* @package Swift
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* @subpackage Mime
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* @author Chris Corbyn
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*/
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class Swift_Mime_ContentEncoder_Base64ContentEncoder
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extends Swift_Encoder_Base64Encoder
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implements Swift_Mime_ContentEncoder
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{
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/**
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* Encode stream $in to stream $out.
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* @param Swift_OutputByteStream $in
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* @param Swift_InputByteStream $out
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* @param int $firstLineOffset
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* @param int $maxLineLength, optional, 0 indicates the default of 76 bytes
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*/
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public function encodeByteStream(
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Swift_OutputByteStream $os, Swift_InputByteStream $is, $firstLineOffset = 0,
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$maxLineLength = 0)
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{
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if (0 >= $maxLineLength || 76 < $maxLineLength)
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{
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$maxLineLength = 76;
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}
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$remainder = 0;
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while (false !== $bytes = $os->read(8190))
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{
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$encoded = base64_encode($bytes);
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$encodedTransformed = '';
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$thisMaxLineLength = $maxLineLength - $remainder - $firstLineOffset;
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while ($thisMaxLineLength < strlen($encoded))
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{
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$encodedTransformed .= substr($encoded, 0, $thisMaxLineLength) . "\r\n";
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$firstLineOffset = 0;
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$encoded = substr($encoded, $thisMaxLineLength);
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$thisMaxLineLength = $maxLineLength;
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$remainder = 0;
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}
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if (0 < $remainingLength = strlen($encoded))
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{
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$remainder += $remainingLength;
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$encodedTransformed .= $encoded;
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$encoded = null;
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}
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$is->write($encodedTransformed);
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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 'base64'.
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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 'base64';
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}
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}
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