authorize.php 5.61 KB
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<?php

/**
 * @file
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 * Administrative script for running authorized file operations.
 *
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 * Using this script, the site owner (the user actually owning the files on the
 * webserver) can authorize certain file-related operations to proceed with
 * elevated privileges, for example to deploy and upgrade modules or themes.
 * Users should not visit this page directly, but instead use an administrative
 * user interface which knows how to redirect the user to this script as part of
 * a multistep process. This script actually performs the selected operations
 * without loading all of Drupal, to be able to more gracefully recover from
 * errors. Access to the script is controlled by a global killswitch in
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 * settings.php ('allow_authorize_operations') and via the 'administer software
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 * updates' permission.
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 *
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 * There are helper functions for setting up an operation to run via this
 * system in modules/system/system.module. For more information, see:
 * @link authorize Authorized operation helper functions @endlink
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 */

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// Change the directory to the Drupal root.
chdir('..');

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/**
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 * Global flag to identify update.php and authorize.php runs.
 *
 * Identifies update.php and authorize.php runs, avoiding unwanted operations
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 * such as css/js preprocessing and translation, and solves some theming issues.
 * The flag is checked in other places in Drupal code (not just authorize.php).
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 */
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const MAINTENANCE_MODE = 'update';
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/**
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 * Renders a 403 access denied page for authorize.php.
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 */
function authorize_access_denied_page() {
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  drupal_add_http_header('Status', '403 Forbidden');
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  watchdog('access denied', 'authorize.php', NULL, WATCHDOG_WARNING);
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  drupal_set_title('Access denied');
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  return t('You are not allowed to access this page.');
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}

/**
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 * Determines if the current user is allowed to run authorize.php.
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 *
 * The killswitch in settings.php overrides all else, otherwise, the user must
 * have access to the 'administer software updates' permission.
 *
 * @return
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 *   TRUE if the current user can run authorize.php, and FALSE if not.
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 */
function authorize_access_allowed() {
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  return settings()->get('allow_authorize_operations', TRUE) && user_access('administer software updates');
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}

// *** Real work of the script begins here. ***

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require_once __DIR__ . '/includes/bootstrap.inc';
require_once __DIR__ . '/includes/common.inc';
require_once __DIR__ . '/includes/file.inc';
require_once __DIR__ . '/includes/module.inc';
require_once __DIR__ . '/includes/ajax.inc';
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// We prepare only a minimal bootstrap. This includes the database and
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// variables, however, so we have access to the class autoloader.
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drupal_bootstrap(DRUPAL_BOOTSTRAP_SESSION);

// This must go after drupal_bootstrap(), which unsets globals!
global $conf;

// We have to enable the user and system modules, even to check access and
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// display errors via the maintenance theme.
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$module_list['system'] = 'core/modules/system/system.module';
$module_list['user'] = 'core/modules/user/user.module';
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Drupal::moduleHandler()->setModuleList($module_list);
Drupal::moduleHandler()->load('system');
Drupal::moduleHandler()->load('user');
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// Initialize the language system.
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drupal_language_initialize();

// Initialize the maintenance theme for this administrative script.
drupal_maintenance_theme();

$output = '';
$show_messages = TRUE;

if (authorize_access_allowed()) {
  // Load both the Form API and Batch API.
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  require_once __DIR__ . '/includes/form.inc';
  require_once __DIR__ . '/includes/batch.inc';
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  // Load the code that drives the authorize process.
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  require_once __DIR__ . '/includes/authorize.inc';
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  if (isset($_SESSION['authorize_operation']['page_title'])) {
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    drupal_set_title($_SESSION['authorize_operation']['page_title']);
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  }
  else {
    drupal_set_title(t('Authorize file system changes'));
  }

  // See if we've run the operation and need to display a report.
  if (isset($_SESSION['authorize_results']) && $results = $_SESSION['authorize_results']) {

    // Clear the session out.
    unset($_SESSION['authorize_results']);
    unset($_SESSION['authorize_operation']);
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    unset($_SESSION['authorize_filetransfer_info']);
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    if (!empty($results['page_title'])) {
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      drupal_set_title($results['page_title']);
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    }
    if (!empty($results['page_message'])) {
      drupal_set_message($results['page_message']['message'], $results['page_message']['type']);
    }

    $output = theme('authorize_report', array('messages' => $results['messages']));
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    $links = array();
    if (is_array($results['tasks'])) {
      $links += $results['tasks'];
    }
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    else {
      $links = array_merge($links, array(
        l(t('Administration pages'), 'admin'),
        l(t('Front page'), '<front>'),
      ));
    }
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    $output .= theme('item_list', array('items' => $links, 'title' => t('Next steps')));
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  }
  // If a batch is running, let it run.
  elseif (isset($_GET['batch'])) {
    $output = _batch_page();
  }
  else {
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    if (empty($_SESSION['authorize_operation']) || empty($_SESSION['authorize_filetransfer_info'])) {
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      $output = t('It appears you have reached this page in error.');
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    }
    elseif (!$batch = batch_get()) {
      // We have a batch to process, show the filetransfer form.
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      $elements = drupal_get_form('authorize_filetransfer_form');
      $output = drupal_render($elements);
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    }
  }
  // We defer the display of messages until all operations are done.
  $show_messages = !(($batch = batch_get()) && isset($batch['running']));
}
else {
  $output = authorize_access_denied_page();
}

if (!empty($output)) {
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  drupal_add_http_header('Content-Type', 'text/html; charset=utf-8');
  print theme('maintenance_page', array('content' => $output, 'show_messages' => $show_messages));
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}