vendor/guzzlehttp/psr7/src/StreamWrapper.php

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<?php

declare(strict_types=1);

namespace GuzzleHttp\Psr7;

use Psr\Http\Message\StreamInterface;

/**
 * Converts Guzzle streams into PHP stream resources.
 *
 * @see https://www.php.net/streamwrapper
 */
final class StreamWrapper
{
    /** @var resource */
    public $context;

    /** @var StreamInterface */
    private $stream;

    /** @var string r, r+, or w */
    private $mode;

    /**
     * Returns a resource representing the stream.
     *
     * @param StreamInterface $stream The stream to get a resource for
     *
     * @return resource
     *
     * @throws \InvalidArgumentException if stream is not readable or writable
     */
    public static function getResource(StreamInterface $stream)
    {
        self::register();

        if ($stream->isReadable()) {
            $mode = $stream->isWritable() ? 'r+' : 'r';
        } elseif ($stream->isWritable()) {
            $mode = 'w';
        } else {
            throw new \InvalidArgumentException('The stream must be readable, '
                . 'writable, or both.');
        }

        return fopen('guzzle://stream', $mode, false, self::createStreamContext($stream));
    }

    /**
     * Creates a stream context that can be used to open a stream as a php stream resource.
     *
     * @return resource
     */
    public static function createStreamContext(StreamInterface $stream)
    {
        return stream_context_create([
            'guzzle' => ['stream' => $stream]
        ]);
    }