RewriteTest.php

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<?php

namespace Elgg\Router\Middleware;

use Elgg\Exceptions\HttpException;
use Elgg\Request;
use Elgg\Router\RewriteTester;

class RewriteTest {

    public function __invoke(Request $request) {

        $rewriteTester = new RewriteTester();
        $url = elgg_get_site_url() . '__testing_rewrite?__testing_rewrite=1';
        if (!$rewriteTester->runRewriteTest($url)) {
            // see if there is a problem accessing the site at all
            // due to ip restrictions for example
            if (!$rewriteTester->runLocalhostAccessTest()) {
                // note: translation may not be available until after upgrade
                $msg = elgg_echo('installation:htaccess:localhost:connectionfailed');
                if ($msg === 'installation:htaccess:localhost:connectionfailed') {
                    $msg = 'Elgg cannot connect to itself to test rewrite rules properly. Check ';
                    $msg .= 'that curl is working and there are no IP restrictions preventing ';
                    $msg .= 'localhost connections.';
                }

                throw new HttpException($msg, ELGG_HTTP_INTERNAL_SERVER_ERROR);
            }

            // note: translation may not be available until after upgrade
            $msg = elgg_echo('installation:htaccess:needs_upgrade');
            if ($msg === 'installation:htaccess:needs_upgrade') {
                $msg = 'You must update your .htaccess file (use install/config/htaccess.dist as a guide).';
            }

            throw new HttpException($msg, ELGG_HTTP_INTERNAL_SERVER_ERROR);
        }
    }
}