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<?php
declare(strict_types=1);
namespace GuzzleHttp\Psr7;
use Psr\Http\Message\StreamInterface;
/**
 * Stream decorator that can cache previously read bytes from a sequentially
 * read stream.
 */
final class CachingStream implements StreamInterface
{
    use StreamDecoratorTrait;
    /** @var StreamInterface Stream being wrapped */
    private $remoteStream;
    /** @var int Number of bytes to skip reading due to a write on the buffer */
    private $skipReadBytes = 0;
    /**
     * @var StreamInterface
     */
    private $stream;
    /**
     * We will treat the buffer object as the body of the stream
     *
     * @param StreamInterface $stream Stream to cache. The cursor is assumed to be at the beginning of the stream.
     * @param StreamInterface $target Optionally specify where data is cached
     */
    public function __construct(
        StreamInterface $stream,
        StreamInterface $target = null
    ) {
        $this->remoteStream = $stream;
        $this->stream = $target ?: new Stream(Utils::tryFopen('php://temp', 'r+'));
    }
    public function getSize(): ?int
    {
        $remoteSize = $this->remoteStream->getSize();
 
 
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