<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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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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namespace Symfony\Component\Mime\Encoder;
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use Symfony\Component\Mime\Exception\RuntimeException;
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/**
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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final class Base64ContentEncoder extends Base64Encoder implements ContentEncoderInterface
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{
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public function encodeByteStream($stream, int $maxLineLength = 0): iterable
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{
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if (!\is_resource($stream)) {
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throw new \TypeError(sprintf('Method "%s" takes a stream as a first argument.', __METHOD__));
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}
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$filter = stream_filter_append($stream, 'convert.base64-encode', \STREAM_FILTER_READ, [
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'line-length' => 0 >= $maxLineLength || 76 < $maxLineLength ? 76 : $maxLineLength,
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'line-break-chars' => "\r\n",
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]);
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if (!\is_resource($filter)) {
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throw new RuntimeException('Unable to set the base64 content encoder to the filter.');
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}
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if (stream_get_meta_data($stream)['seekable'] ?? false) {
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rewind($stream);
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}
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while (!feof($stream)) {
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yield fread($stream, 8192);
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}
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stream_filter_remove($filter);
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}
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public function getName(): string
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{
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return 'base64';
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}
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}
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