StreamFactory.php

<?php
declare(strict_types=1);

/**
 * CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
 * @link          https://cakephp.org CakePHP(tm) Project
 * @since         5.0.0
 * @license       https://opensource.org/licenses/mit-license.php MIT License
 */
namespace Cake\Http;

use Laminas\Diactoros\Stream;
use Psr\Http\Message\StreamFactoryInterface;
use Psr\Http\Message\StreamInterface;
use RuntimeException;

/**
 * Factory class for creating stream instances.
 */
class StreamFactory implements StreamFactoryInterface
{
    /**
     * Create a new stream from a string.
     *
     * The stream SHOULD be created with a temporary resource.
     *
     * @param string $content String content with which to populate the stream.
     */
    public function createStream(string $content = ''): StreamInterface
    {
        $resource = fopen('php://temp', 'r+');
        assert($resource !== false, 'Unable to create resource');
        fwrite($resource, $content);
        rewind($resource);

        return $this->createStreamFromResource($resource);
    }

    /**
     * Create a stream from an existing file.
     *
     * The file MUST be opened using the given mode, which may be any mode
     * supported by the `fopen` function.
     *
     * The `$filename` MAY be any string supported by `fopen()`.
     *
     * @param string $filename The filename or stream URI to use as basis of stream.
     * @param string $mode The mode with which to open the underlying filename/stream.
     * @throws \RuntimeException If the file cannot be opened.
     * @throws \InvalidArgumentException If the mode is invalid.
     */
    public function createStreamFromFile(string $filename, string $mode = 'r'): StreamInterface
    {
        if (!is_readable($filename)) {
            throw new RuntimeException(sprintf('Cannot read file `%s`', $filename));
        }

        return new Stream($filename, $mode);
    }

    /**
     * Create a new stream from an existing resource.
     *
     * The stream MUST be readable and may be writable.
     *
     * @param resource $resource The PHP resource to use as the basis for the stream.
     */
    public function createStreamFromResource($resource): StreamInterface
    {
        return new Stream($resource);
    }
}