views_arg_fallback.module

<?php 

/**
 * Implements hook_views_api().
 */
function views_arg_fallback_views_api() {
  return array(
    'api' => 3,
    'path' => drupal_get_path('module', 'views_arg_fallback') . '/includes/views',
  );
}

/*
 * Ensure that a referer url is internal and return the path
 */
function _views_arg_fallback_referer_path($referer) {
  global $base_url;
  $alias = str_replace($base_url . '/', '', $referer);
  if (strcmp($alias, $referer)) {

    // drupal_get_normal_path() cannot handle query strings, so remove it.
    $alias = strtok($alias, '?');

    $path = drupal_get_normal_path($alias);
    return $path;
  }
}