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New module 'Custom error'

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Manuel Cillero 2017-07-26 22:28:06 +02:00
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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
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This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
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Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
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You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.

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CUSTOM ERROR README.txt
=======================
This module allows the site admin to create custom error pages for
HTTP status codes 403 (access denied) and 404 (not found), without the
need to create nodes for each of them.
Main features:
* Configurable page title and descriptions.
* There are no author and date/time headers as with normal nodes.
* Any HTML formatted text can be be put in the page body.
* The error pages are themeable.
* Users who are not logged in and try to access an area that requires
login will be redirected to the page they were trying to access after
they login.
* Allows custom redirects for 404s.
Since the error pages are not real nodes, they do not have a specific
content type, and will not show up in node listings.
At present, the module can be set up to handle 403 and 404
errors. Drupal only allows those two errors to be assigned custom
pages. However, the design of the module is flexible and can
accommodate future error codes easily.
Installation:
-------------
1. Install the customerror module directory in the directory where you
keep contributed modules (e.g. sites/all/modules/).
2. Go to the Modules page
- Enable the customerror module.
- If you want to messages to contain PHP, enable the core
PHP filter module.
Click on Save configuration.
3. Configure Error reporting
- Go to Administer -> Site configuration -> Error reporting
- For 403 (access denied), enter the value:
customerror/403
- For 404 (not found), enter the value:
customerror/404
Click on Save configuration.
4. Configure the module:
- Go to Administer -> Site configuration -> Custom error
- Enter any title and description you want for the 404 (not found)
and 403 (access denied) pages.
- You can use any HTML tags to format the text.
Click on Save configuration.
5. Test your error pages.
- Copy your present admin page url.
- Try to go to a non-existent Drupal page on your site.
You should see your custom error page for 404 (not found) page.
- Log out from your site.
- Paste the admin page url and try to go there.
You should see your custom error page for 403 (access denied) page.
Redirecting upon login
----------------------
Here is an example of how to add custom PHP to a 403 to give the user
the option to login:
<?php
global $user;
if ($user->uid == 0) {
$output = '<p>';
$output .= t('If your user account has access to this page, please !message.',
array(
'!message' => l(t('log in'), 'user'),
)
);
$output .= '</p>';
print $output;
}
?>
Note that customerror keeps track of what page the user is trying to
access, so after logging in, the user will be redirected to that page.
Theme to be used on the error page
----------------------------------
If you've set an administration theme, the default is to use this on
all pages where the path is "admin", including 403 and 404 error
pages. You can overide this by specifying a theme for custom error
different from "System default".
This setting has no effect if the administration theme is set to
"<System default>".
Custom redirects for 404 errors
-------------------------------
It is possible to set up custom redirects for status code 404 (not
found).
For example if you had a page called foo and a page called xyz, then
you moved them to a page called bar, and abc respectively, you can
setup a redirect pair of:
^foo$ bar
^xyz$ abc
The first pair will transparently redirect users trying to access
example.com/foo to example.com/bar. The second pair will
transparently redirect users trying to access example.com/xyz to
example.com/abc.
You can have multiple pairs of redirects. Each must be on a line by
itself.
Note that the first argument is a regexp, and the second argument is a
path. You have to use one space between them, and enter each pattern
on a line by itself. You cannot use variables.
For more flexible URL rewriting, including variables, you may consider
using an external URL rewrite engine, such as Apache mod_rewrite.
FAQ
---
* I want to prevent robots from indexing my custom error pages by
setting the robots meta tag in the HTML head to NOINDEX.
- There is no need to. CustomError returns the correct HTTP status
codes (403 and 404). This will prevent robots from indexing the
error pages.
* I want to customize the custom error template output.
- In your site's theme, duplicate your page.tpl.php to be
page-customerror.tpl.php and then make your modifications there.
* I want to have a different template for my 404 and 403 pages.
- Duplicate your page.tpl.php page to be page-customerror-404.tpl.php
and page-customerror-403.tpl.php. You do not need a
page-customerror.tpl.php for this to work.
* Some 403 errors (e.g. "http://example.org/includes") are served by
the Apache web server and not by CustomError. Isn't that a bug?
- No. CustomError is only designed to provide a custom error page
when the page is processed by Drupal. The .htaccess file that
comes with Drupal will catch some attempts to access forbidden
directories before Drupal even see the requests. These access
attempts will get the default Apache 403 error document, unless
you use the Apache ErrorDocument directive to override this, e.g:
ErrorDocument 403 /error/403.html
For more information about this, see:
http://httpd.apache.org/docs/current/custom-error.html
* How can I get blocks to appear on the custom 403 and 404 pages?
- Blocks will not appear on the custom 403 and 404 pages produced by
this module. If you want the blocks shown, either upgrade to the
Drupal 7 version, or use the "404 Blocks" module as a workaround.
URLs:
https://drupal.org/node/709298
https://drupal.org/project/blocks404
Database
--------
This module does not require any new database tables to be installed.
Bugs/Features/Patches
---------------------
If you want to report a bug, request a feature, or submit a patch,
please do so in the issue queue at the project page on the Drupal web
site:
http://drupal.org/project/customerror
Online documentation
--------------------
For more documentation, please see:
https://drupal.org/node/2064843
Author
------
Principal author is Khalid Baheyeldin
(http://baheyeldin.com/khalid and http://2bits.com).
Auxiliary maintainer is Gisle Hannemyr
(https://drupal.org/user/409554).
The authors can be contacted for paid customizations of this module
as well as Drupal consulting, installation, development, and
customizations.

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name = Custom Error
description = Enables the creation of custom error pages for 404 and 403 errors, as well as redirects for 404s.
core=6.x
; Information added by Drupal.org packaging script on 2014-08-17
version = "6.x-1.4"
core = "6.x"
project = "customerror"
datestamp = "1408264129"

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<?php
/**
* @file
* Install and uninstall hooks.
*/
/**
* Implements hook_uninstall().
*/
function customerror_uninstall() {
db_query("DELETE FROM {variable} WHERE name LIKE 'customerror_%'");
foreach (_customerror_enum_errors() as $code => $desc) {
if (variable_get('site_' . $code, '') == 'customerror/' . $code) {
variable_del('site_' . $code, '');
}
}
}

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<?php
/**
* @file
* Enables custom 404 (not found) and 403 (access denied) pages in Drupal.
*
* There is no need for creating real nodes under taxonomies.
*
* Copyright 2005 Khalid Baheyeldin http://2bits.com
*/
/**
* Helper function to set up array of error coedes.
*
* This is where the error codes and their default descriptions are
* stored. Add here as necessary.
*/
function _customerror_enum_errors() {
$errors = array(
404 => t('requested page not found'),
403 => t('access denied'),
);
// Sorting array here by keys so they are logically sorted on form.
ksort($errors);
return $errors;
}
/**
* Fetch error.
*/
function _customerror_fetch_error($error_code) {
$errors = _customerror_enum_errors();
$default_desc = t('unknown error: @error_code', array('@error_code' => $error_code));
$r = $default_desc;
foreach ($errors as $code => $desc) {
if ($error_code == $code) {
$r = $desc;
}
}
return $r;
}
/**
* Implements hook_help().
*/
function customerror_help($path, $arg) {
$output = '';
switch ($path) {
case 'admin/modules#description':
case 'admin/settings/customerr':
$output = t('Enables the creation of custom error pages for 404 and 403 errors.');
break;
}
return $output;
}
/**
* Callback, page arguments.
*/
function customerror_admin_settings() {
$form = array(
'customerror_form_description' => array(
'#type' => 'markup',
'#value' => t('Enter the error pages that will be seen by your visitors when they get the respective errors. You can enter any HTML text. You can point the users to the FAQ, inform them that you reorganized the site, ask them to report the error, login or register, ...etc.'),
),
);
$themes = system_theme_data();
ksort($themes);
$theme_options[0] = t('System default');
foreach ($themes as $theme) {
if ($theme->status) {
$theme_options[$theme->name] = $theme->name;
}
}
$errors = _customerror_enum_errors();
foreach ($errors as $code => $desc) {
if (variable_get('site_' . $code, '') != 'customerror/' . $code) {
drupal_set_message(t('Error reporting is not set for error !error. Please ensure that the default !error page is set to be customerror/!error on the !link.',
array(
'!error' => $code,
'!link' => l(t('Error reporting settings page'), 'admin/settings/error-reporting'),
)),
'error');
}
}
foreach ($errors as $code => $desc) {
$group = 'customerror_' . $code . '_group';
$form[$group] = array(
'#type' => 'fieldset',
'#title' => t('!code Error Settings', array('!code' => $code)),
'#collapsed' => TRUE,
'#collapsible' => TRUE,
);
$form[$group]['customerror_' . $code . '_title'] = array(
'#type' => 'textfield',
'#title' => t('Title for @code', array('@code' => $code)),
'#default_value' => variable_get('customerror_' . $code . '_title', $desc),
'#size' => 70,
'#maxlength' => 70,
'#description' => t('Title of @code error page', array('@code' => $code)),
);
$form[$group]['customerror_' . $code] = array(
'#type' => 'textarea',
'#title' => t('Description for @code', array('@code' => $code)),
'#default_value' => variable_get('customerror_' . $code, $desc),
'#rows' => 10,
'#description' => t('This text will be displayed if a @code (@desc) error occurs.', array('@code' => $code, '@desc' => $desc)),
);
$form[$group]['customerror_' . $code . '_theme'] = array(
'#type' => 'select',
'#options' => $theme_options,
'#title' => t('Theme'),
'#description' => t('Theme to be used on the error page below the admin path.'),
'#default_value' => variable_get('customerror_' . $code . '_theme', 0),
);
$form[$group]['customerror_' . $code . '_php'] = array(
'#type' => 'checkbox',
'#title' => t('Allow PHP code to be executed for @code', array('@code' => $code)),
'#default_value' => variable_get('customerror_' . $code . '_php', FALSE),
'#description' => t('This allows you to include PHP code (enclosed in &lt;?php ?&gt; tags) for the @code (@desc) message. Note that this can be dangerous in some situations. Make sure that you are aware of the implications.', array('@code' => $code, '@desc' => $desc)),
);
}
$form['redirects'] = array(
'#type' => 'fieldset',
'#title' => t('404 Redirects'),
'#collapsed' => TRUE,
'#collapsible' => TRUE,
);
$form['redirects']['customerror_redirect'] = array(
'#type' => 'textarea',
'#title' => t('Redirect list'),
'#default_value' => variable_get('customerror_redirect', ''),
'#rows' => 10,
'#description' => t('These are custom redirect pairs, one per line. Each pair requires a path to match (which is a regular expression) and a destination separated by a space. The keyword <em>&lt;front></em> is allowed as a destination. If you are unfamilar with regular expressions, a simple search string will work, but will match any part of the URl. For example <em>index.html &lt;front></em> will match both <em>http://example.com/index.html &amp; http://example.com/archive/index.html</em>.'),
);
return system_settings_form($form);
}
/**
* Implements hook_menu().
*/
function customerror_menu() {
$items = array();
$items['admin/settings/customerror'] = array(
'title' => 'Custom error',
'description' => 'Administer custom error.',
'page callback' => 'drupal_get_form',
'page arguments' => array('customerror_admin_settings'),
'access arguments' => array('administer site configuration'),
'type' => MENU_NORMAL_ITEM,
);
$items['customerror'] = array(
'title' => 'customerror',
'access callback' => TRUE,
'page callback' => 'customerror_page',
'type' => MENU_CALLBACK,
);
return $items;
}
/**
* Implements hook_simpletest().
*/
function customerror_simpletest() {
return array_keys(file_scan_directory(
drupal_get_path('module', 'customerror') . '/tests', '\.test$'));
}
/**
* Displays the 403 or 404 error page.
*/
function customerror_page() {
$code = arg(1);
// Set custom theme for error_page if any has been selected, 0 => default.
$theme = customerror_get_theme($code);
if (!empty($theme)) {
global $custom_theme;
$custom_theme = $theme;
}
switch ($code) {
case 403:
$internal_path = substr(request_uri(), strlen(base_path()));
if ($internal_path) {
$_REQUEST['destination'] = $internal_path;
}
else {
$_REQUEST['destination'] = variable_get('site_frontpage', 'node');
}
$_SESSION['destination'] = $_REQUEST['destination'];
case 404:
default:
// Treat an unknown method as a 404.
// Check if we should redirect.
customerror_check_redirect();
// Make sure that we sent an appropriate header.
customerror_header($code);
module_invoke_all('customerror_pre_render', $code);
drupal_set_title(variable_get('customerror_' . $code . '_title', _customerror_fetch_error($code)));
$output = theme('customerror', $code, variable_get('customerror_' . $code, _customerror_fetch_error($code)));
$output = (variable_get('customerror_' . $code . '_php', FALSE)) ? drupal_eval($output) : $output;
break;
}
return $output;
}
/**
* Make sure that we sent an appropriate header.
*/
function customerror_header($code) {
switch ($code) {
case 403:
drupal_set_header('HTTP/1.1 403 Forbidden');
break;
case 404:
drupal_set_header('HTTP/1.1 404 Not Found');
break;
}
}
/**
* Implements hook_theme().
*/
function customerror_theme() {
return array(
'customerror' => array(
'arguments' => array('code', 'content'),
),
);
}
/**
* Themeable function.
*/
function theme_customerror($code, $content) {
return $content;
}
/**
* Implements hook_user().
*/
function customerror_user($op, $edit, $user) {
switch ($op) {
case 'login':
// Check if we have a destination saved in the session.
if (!empty($_SESSION['destination'])) {
// If there is one, then set the REQUEST destination to it.
$_REQUEST['destination'] = $_SESSION['destination'];
// And clear the one in the session.
unset($_SESSION['destination']);
// User module then does a drupal_goto() after we return from here.
}
}
}
/**
* Check list of redirects.
*/
function customerror_check_redirect() {
$destination = $_REQUEST['destination'];
if (empty($destination)) {
return;
}
$redirects = trim(variable_get('customerror_redirect', ''));
if (empty($redirects)) {
return;
}
$redirect_list = explode("\n", $redirects);
foreach ($redirect_list as $item) {
list($src, $dst) = explode(' ', $item);
if (isset($src) && isset($dst)) {
$src = str_replace("/", "\\/", $src);
$dst = str_replace("\r", "", $dst);
// In case there are spaces in the URL, we escape them.
$orig_dst = str_replace(" ", "%20", $destination);
if (preg_match('/' . $src . '/', $orig_dst)) {
$_REQUEST['destination'] = $dst;
drupal_goto($dst);
}
}
}
}
/**
* Implements hook_form_alter().
*
* We need this to be able to search from the error pages, otherwise
* the form POST's to the error page, bringing no results page.
*/
function customerror_form_alter(&$form, &$form_state, $form_id) {
switch ($form_id) {
case 'search_theme_form':
if (arg(0) == 'customerror') {
$form['#action'] = url('search/node');
}
break;
}
}
/**
* Gets the configured display theme for the given error code.
*/
function customerror_get_theme($code = 404) {
$theme = 0;
$admin_theme = variable_get('admin_theme', 0);
if ($admin_theme) {
$theme = variable_get('customerror_' . $code . '_theme', $admin_theme);
}
return $theme;
}

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<?php
/**
* @file
* Automated tests CustomError.
*/
class CustomerrorAccessDeniedTest extends DrupalTestCase {
/**
* Implements getInfo().
*/
public function getInfo() {
return array(
'name' => '403 Access Denied',
'desc' => 'Check that the custom error message is displayed when access is denied.',
'group' => 'CustomError',
);
}
/**
* Tests 403 pages.
*/
public function testAccessDeniedMessage() {
/* Enable CustomError module */
$this->drupalModuleEnable('customerror');
/* Set title and text of error message */
$error_code = 403;
$title = $this->randomName(10, 'simpletest_');
$this->drupalVariableSet('customerror_' . $error_code . '_title', $title);
$description = $this->randomName(512, 'simpletest_');
$this->drupalVariableSet('customerror_' . $error_code, $description);
/* Access error page directly, check for title and text of error message */
$this->get(url('customerror/' . $error_code, NULL, NULL, TRUE));
$this->assertText($title, 'Title on ' . $error_code . ' error page set when accessed directly');
$this->assertText($description, 'Description on ' . $error_code . ' error page set when accessed directly');
/* Point Drupal to the new error message */
$this->drupalVariableSet('site_' . $error_code, 'customerror/' . $error_code);
/* Log in as a user with no privileges */
$user = $this->drupalCreateUserRolePerm();
$this->drupalLoginUser($user);
/* Attempt to access CustomError module settings page */
$this->get(url('admin/settings/customerror', NULL, NULL, TRUE));
/* Check for response code, title and text of error message */
$this->assertResponse($error_code, 'Response code on ' . $error_code . ' error page set when accessed at non-existent URL');
$this->assertText($title, 'Title on ' . $error_code . ' error page set when accessed at non-existent URL');
$this->assertText($description, 'Description on ' . $error_code . ' error page set when accessed at non-existent URL');
}
}

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<?php
/**
* @file
* Automated tests CustomError.
*/
class CustomerrorPageNotFoundTest extends DrupalTestCase {
/**
* Implements getInfo().
*/
public function getInfo() {
return array(
'name' => '404 Page not found',
'desc' => 'Check that the custom error message is displayed when a page is not found.',
'group' => 'CustomError',
);
}
/**
* Tests 404 pages.
*/
public function testPageNotFoundMessage() {
/* Enable CustomError module */
$this->drupalModuleEnable('customerror');
/* Set title and text of error message */
$error_code = 404;
$title = $this->randomName(10, 'simpletest_');
$this->drupalVariableSet('customerror_' . $error_code . '_title', $title);
$description = $this->randomName(512, 'simpletest_');
$this->drupalVariableSet('customerror_' . $error_code, $description);
/* Access error page directly, check for title and text of error message */
$this->get(url('customerror/' . $error_code, NULL, NULL, TRUE));
$this->assertText($title, 'Title on ' . $error_code . ' error page set when accessed directly');
$this->assertText($description, 'Description on ' . $error_code . ' error page set when accessed directly');
/* Point Drupal to the new error message */
$this->drupalVariableSet('site_' . $error_code, 'customerror/' . $error_code);
/* Log in as a user with basic privileges */
$user = $this->drupalCreateUserRolePerm(array('access content'));
$this->drupalLoginUser($user);
/* Access next node ID, shouldn't exist yet. Note that this increments the nid each time it's run. */
$this->get(url('node/' . db_next_id('{node}_nid'), NULL, NULL, TRUE));
/* Check for response code, title and text of error message */
$this->assertResponse($error_code, 'Response code on ' . $error_code . ' error page set when accessed at non-existent URL');
$this->assertText($title, 'Title on ' . $error_code . ' error page set when accessed at non-existent URL');
$this->assertText($description, 'Description on ' . $error_code . ' error page set when accessed at non-existent URL');
/* Could also create node, prove it's accessible, delete it, then try to access again and prove it's gone */
}
}