Cannot use a / in route parameter

The Above patches work only upto 62 url parts after that route will be empty as $ancestors from getCandidateOutlines is having bitwise shift left condition of $end = (1 << $number_parts) - 1; which will skip the execution at https://git.drupalcode.org/project/drupal/-/blob/10.1.x/core/lib/Drupal/Core/Routing/RouteProvider.php#L297

This issue is being reviewed by the kind folks in Slack, #needs-review-queue-initiative. We are working to keep the size of Needs Review queue [2700+ issues] to around 400 (1 month or less), following Review a patch or merge request → as a guide.

This could use an issue summary update with proposed solution and remaining tasks. Think it would be a good spot for the profiling to happen also.

Updated the IS.

prudloff → changed the visibility of the branch 2741939-cannot-use-a to hidden.

prudloff → changed the visibility of the branch 2741939-9.2.x to hidden.

prudloff → changed the visibility of the branch 2741939-8.9.x to hidden.

Core is currently doing for /system/files/ route.

It uses an InboundPathProcessor to get the route of the file, set it to a query parameter and return just the /system/files to allow the route system to match the route, no matter how many / the file has, because now is in a query parameter.

class PathProcessorFiles implements InboundPathProcessorInterface {

  /**
   * {@inheritdoc}
   */
  public function processInbound($path, Request $request) {
    if (str_starts_with($path, '/system/files/') && !$request->query->has('file')) {
      $file_path = preg_replace('|^\/system\/files\/|', '', $path);
      $request->query->set('file', $file_path);
      return '/system/files';
    }
    return $path;
  }

}

Then, in the controller, it gets the target by accessing the file query parameter.

    $target = $request->query->get('file');