RequestFactoryImpl.php

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<?php

namespace ILIAS\HTTP\Request;

use GuzzleHttp\Psr7\ServerRequest;
use Psr\Http\Message\ServerRequestInterface;

class RequestFactoryImpl implements RequestFactory
{
    private const DEFAULT_FORWARDED_HEADER = 'X-Forwarded-Proto';
    private const DEFAULT_FORWARDED_PROTO = 'https';

    public function __construct(
        private ?string $forwarded_header = null,
        private ?string $forwarded_proto = null
    ) {
    }

    public function create(): ServerRequestInterface
    {
        $server_request = ServerRequest::fromGlobals();

        if ($this->forwarded_header !== null && $this->forwarded_proto !== null) {
            if (in_array(
                $this->forwarded_proto,
                $server_request->getHeader($this->forwarded_header),
                true
            )) {
                return $server_request->withUri($server_request->getUri()->withScheme($this->forwarded_proto));
            }

            // alternative if ini settings are used which look like X_FORWARDED_PROTO
            $header_names = array_keys($server_request->getHeaders());
            foreach ($header_names as $header_name) {
                if (str_replace("-", "_", strtoupper($header_name)) !== $this->forwarded_header) {
                    continue;
                }
                if (!in_array($this->forwarded_proto, $server_request->getHeader($header_name), true)) {
                    continue;
                }
                return $server_request->withUri($server_request->getUri()->withScheme($this->forwarded_proto));
            }
        }

        return $server_request;
    }
}