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<?php
declare(strict_types=1);
/*
* This file is part of the TYPO3 CMS project.
*
* It is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, either version 2
* of the License, or any later version.
*
* For the full copyright and license information, please read the
* LICENSE.txt file that was distributed with this source code.
*
* The TYPO3 project - inspiring people to share!
*/
namespace TYPO3\CMS\Core\Http;
use GuzzleHttp\Psr7\LazyOpenStream;
use GuzzleHttp\Psr7\StreamDecoratorTrait;
use Psr\Http\Message\StreamInterface;
/**
* This class implements a stream that can be used like a usual PSR-7 stream
* but is additionally able to provide a file-serving fastpath using readfile().
* The file this stream refers to is opened on demand.
*
* @internal
*/
class SelfEmittableLazyOpenStream implements SelfEmittableStreamInterface
{
use StreamDecoratorTrait;
protected readonly LazyOpenStream $stream;
/**
* Constructor setting up the PHP resource
*/
public function __construct(protected readonly string $filename)
{
$this->stream = new LazyOpenStream($filename, 'r');
}
/**
* Output the contents of the file to the output buffer
*/
public function emit()
{
readfile($this->filename);
}
public function isWritable(): bool
{
return false;
}
/**
* @throws \RuntimeException on failure.
*/
public function write(string $string): int
{
throw new \RuntimeException('Cannot write to a ' . self::class, 1538331833);
}
/**
* Creates the underlying stream lazily when required.
*/
protected function createStream(): StreamInterface
{
return $this->stream->stream;
}
}