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<?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);
}
}
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