probe.module

<?php

/**
 * @file
 * Hook implementations for this module.
 */

use Drupal\probe\Controller\ProbeController;

/**
 * Implements hook_xmlrpc().
 */
function probe_xmlrpc() {
  $methods[] = [
    // First argument is the method name.
    'probe',
    // Callback to execute when this method is requested.
    'probe_xml_request',
    // An array defines the types of output and input values for this method.
    [
      // The first value is the return type, an array in this case.
      'array',
      // An array with requested variables.
      'array',
    ],
    t("Exposes this website's internal details for monitoring updates, logs and other metadata. Access is only granted if the requester's IP is whitelisted or has sent a valid 'probe_key'."),
  ];

  return $methods;
}

/**
 * Callback for probe_xmlrpc().
 */
function probe_xml_request($variables = []) {
  $controller = ProbeController::create(\Drupal::getContainer());
  return $controller->probe($variables);
}