Currently Joomla 4 is not parsing url rewrite in .htaccess, thus requiring to write custom router to parse the url. This proposed change is to fix the url generation so that there is no need to write custom url parser/router.

Steps to reproduce the issue

1. create an article "foo-article" and a menu "foo-menu". The "foo-menu" will accept query string, such as q=xyz.
2. The browser url will look like http://localhost/foo-menu/xyz.html
3. In .htaccess, add re-write rule below

RewriteRule ^foo-menu/(.*).html$ index.php/foo-menu?q=$1 [NC,L]

4. The browser url http://localhost/foo-menu/xyz.html thus becomes http://localhost/foo-menu?q=xyz according to the rewrite rule.

5. However, current router is to parse the browser url of http://localhost/foo-menu/xyz.html, not the rewrite url of http://localhost/foo-menu?q=xyz. This then forces users to create custom router to parse the url.

Expected result

Expect to obey .htaccess rewrite rule when generating the url.

Actual result

.htaccess rewrite rule is ignored.

System information (as much as possible)

Joomla! 4.3.4
Red Hat Apache server

Additional comments

Proposed fix is at libraries/src/Uri/Uri.php when building $theURI in function getInstance as below
(I can not add file "Uri.php", I rename it to "Uri.txt").

public static function getInstance($uri = 'SERVER')
{
    if (empty(static::$instances[$uri])) {
        // Are we obtaining the URI from the server?
        if ($uri === 'SERVER') {
            // Determine if the request was over SSL (HTTPS).
            if (isset($_SERVER['HTTPS']) && !empty($_SERVER['HTTPS']) && (strtolower($_SERVER['HTTPS']) !== 'off')) {
                $https = 's://';
            } elseif (
                (isset($_SERVER['HTTP_X_FORWARDED_PROTO'])
                && !empty($_SERVER['HTTP_X_FORWARDED_PROTO'])
                && (strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']) !== 'http'))
            ) {
                $https = 's://';
            } else {
                $https = '://';
            }

            /*
             * Since we are assigning the URI from the server variables, we first need
             * to determine if we are running on apache or IIS.  If PHP_SELF and REQUEST_URI
             * are present, we will assume we are running on apache.
             */

            if (!empty($_SERVER['PHP_SELF']) && !empty($_SERVER['PATH_INFO']) && !empty($_SERVER['QUERY_STRING'])) {

                $theURI = 'http' . $https . $_SERVER['HTTP_HOST'] . $_SERVER['PATH_INFO'] . '?' . $_SERVER['QUERY_STRING'];;

            } else if (!empty($_SERVER['PHP_SELF']) && !empty($_SERVER['REQUEST_URI'])) {
                // To build the entire URI we need to prepend the protocol, and the http host
                // to the URI string.
                $theURI = 'http' . $https . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
            } else {
                /*
                 * Since we do not have REQUEST_URI to work with, we will assume we are
                 * running on IIS and will therefore need to work some magic with the SCRIPT_NAME and
                 * QUERY_STRING environment variables.
                 *
                 * IIS uses the SCRIPT_NAME variable instead of a REQUEST_URI variable... thanks, MS
                 */
                $theURI = 'http' . $https . $_SERVER['HTTP_HOST'] . $_SERVER['SCRIPT_NAME'];

                // If the query string exists append it to the URI string
                if (isset($_SERVER['QUERY_STRING']) && !empty($_SERVER['QUERY_STRING'])) {
                    $theURI .= '?' . $_SERVER['QUERY_STRING'];
                }
            }

            // Extra cleanup to remove invalid chars in the URL to prevent injections through the Host header
            $theURI = str_replace(["'", '"', '<', '>'], ['%27', '%22', '%3C', '%3E'], $theURI);
        } else {
            // We were given a URI
            $theURI = $uri;
        }

        static::$instances[$uri] = new static($theURI);
    }

    return static::$instances[$uri];
}

Uri.txt