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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Mime\Encoder;
use Symfony\Component\Mime\Exception\RuntimeException;
/**
* @author Fabien Potencier <fabien@symfony.com>
*
* @experimental in 4.3
*/
final class Base64ContentEncoder extends Base64Encoder implements ContentEncoderInterface
{
public function encodeByteStream($stream, int $maxLineLength = 0): iterable
{
if (!\is_resource($stream)) {
throw new \TypeError(sprintf('Method "%s" takes a stream as a first argument.', __METHOD__));
}
$filter = stream_filter_append($stream, 'convert.base64-encode', \STREAM_FILTER_READ, [
'line-length' => 0 >= $maxLineLength || 76 < $maxLineLength ? 76 : $maxLineLength,
'line-break-chars' => "\r\n",
]);
if (!\is_resource($filter)) {
throw new RuntimeException('Unable to set the base64 content encoder to the filter.');
}
if (stream_get_meta_data($stream)['seekable'] ?? false) {
rewind($stream);
}
while (!feof($stream)) {
yield fread($stream, 8192);
}
stream_filter_remove($filter);
}
public function getName(): string
{
return 'base64';
}
}
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