TokenStream.php

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<?php

declare(strict_types=1);

namespace ILIAS\ResourceStorage\Consumer\StreamAccess;

use ILIAS\Filesystem\Stream\Stream;

class TokenStream extends Stream
{
    private ?string $mime_type = null;

    public function getMimeType(): ?string
    {
        if ($this->mime_type === null) {
            $finfo = finfo_open(FILEINFO_MIME_TYPE);
            //We only need the first few bytes to determine the mime-type this helps to reduce RAM-Usage
            $this->rewind();
            $this->mime_type = finfo_buffer($finfo, $this->read(255)) ?: 'application/octet-stream';
            $this->rewind();
        }
        return $this->mime_type;
    }
}