summaryrefslogtreecommitdiffstats
path: root/authorize.php
blob: 3c0bd7b36e270d0ad6a27db88ee833e0fbea6788 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
<?php

/**
 * @file
 * Administrative script for running authorized file operations.
 *
 * 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 settings.php ('allow_authorize_operations') and via
 * the 'administer software updates' permission.
 *
 * 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
 */

/**
 * Root directory of Drupal installation.
 */
define('DRUPAL_ROOT', getcwd());

/**
 * Global flag to identify update.php and authorize.php runs, and so
 * avoid various unwanted operations, such as hook_init() and
 * hook_exit() invokes, css/js preprocessing and translation, and
 * solve some theming issues. This flag is checked on several places
 * in Drupal code (not just authorize.php).
 */
define('MAINTENANCE_MODE', 'update');

/**
 * Renders a 403 access denied page for authorize.php.
 */
function authorize_access_denied_page() {
  drupal_add_http_header('Status', '403 Forbidden');
  watchdog('access denied', 'authorize.php', NULL, WATCHDOG_WARNING);
  drupal_set_title('Access denied');
  return t('You are not allowed to access this page.');
}

/**
 * Determines if the current user is allowed to run authorize.php.
 *
 * The killswitch in settings.php overrides all else, otherwise, the user must
 * have access to the 'administer software updates' permission.
 *
 * @return
 *   TRUE if the current user can run authorize.php, otherwise FALSE.
 */
function authorize_access_allowed() {
  return variable_get('allow_authorize_operations', TRUE) && user_access('administer software updates');
}

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

require_once DRUPAL_ROOT . '/includes/bootstrap.inc';
require_once DRUPAL_ROOT . '/includes/session.inc';
require_once DRUPAL_ROOT . '/includes/common.inc';
require_once DRUPAL_ROOT . '/includes/file.inc';
require_once DRUPAL_ROOT . '/includes/module.inc';
require_once DRUPAL_ROOT . '/includes/ajax.inc';

// We prepare only a minimal bootstrap. This includes the database and
// variables, however, so we have access to the class autoloader registry.
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
// display errors via the maintenance theme.
$module_list['system']['filename'] = 'modules/system/system.module';
$module_list['user']['filename'] = 'modules/user/user.module';
module_list(TRUE, FALSE, FALSE, $module_list);
drupal_load('module', 'system');
drupal_load('module', 'user');

// We also want to have the language system available, but we do *NOT* want to
// actually call drupal_bootstrap(DRUPAL_BOOTSTRAP_LANGUAGE), since that would
// also force us through the DRUPAL_BOOTSTRAP_PAGE_HEADER phase, which loads
// all the modules, and that's exactly what we're trying to avoid.
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.
  require_once DRUPAL_ROOT . '/includes/form.inc';
  require_once DRUPAL_ROOT . '/includes/batch.inc';
  // Load the code that drives the authorize process.
  require_once DRUPAL_ROOT . '/includes/authorize.inc';

  // For the sake of Batch API and a few other low-level functions, we need to
  // initialize the URL path into $_GET['q']. However, we do not want to raise
  // our bootstrap level, nor do we want to call drupal_initialize_path(),
  // since that is assuming that modules are loaded and invoking hooks.
  // However, all we really care is if we're in the middle of a batch, in which
  // case $_GET['q'] will already be set, we just initialize it to an empty
  // string if it's not already defined.
  if (!isset($_GET['q'])) {
    $_GET['q'] = '';
  }

  if (isset($_SESSION['authorize_operation']['page_title'])) {
    drupal_set_title($_SESSION['authorize_operation']['page_title']);
  }
  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']);
    unset($_SESSION['authorize_filetransfer_info']);

    if (!empty($results['page_title'])) {
      drupal_set_title($results['page_title']);
    }
    if (!empty($results['page_message'])) {
      drupal_set_message($results['page_message']['message'], $results['page_message']['type']);
    }

    $output = theme('authorize_report', array('messages' => $results['messages']));

    $links = array();
    if (is_array($results['tasks'])) {
      $links += $results['tasks'];
    }
    else {
      $links = array_merge($links, array(
        l(t('Administration pages'), 'admin'),
        l(t('Front page'), '<front>'),
      ));
    }

    $output .= theme('item_list', array('items' => $links, 'title' => t('Next steps')));
  }
  // If a batch is running, let it run.
  elseif (isset($_GET['batch'])) {
    $output = _batch_page();
  }
  else {
    if (empty($_SESSION['authorize_operation']) || empty($_SESSION['authorize_filetransfer_info'])) {
      $output = t('It appears you have reached this page in error.');
    }
    elseif (!$batch = batch_get()) {
      // We have a batch to process, show the filetransfer form.
      $elements = drupal_get_form('authorize_filetransfer_form');
      $output = drupal_render($elements);
    }
  }
  // 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)) {
  print theme('update_page', array('content' => $output, 'show_messages' => $show_messages));
}