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<?php
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/* $Id: search404.module,v 1.15 2008/03/04 12:14:30 zyxware Exp $ */
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/**
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* Implementation of hook_menu().
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*/
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function search404_menu() {
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$items = array();
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$items['search404'] = array(
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'title' => t('Page not found'),
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'access callback' => TRUE,
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'page callback' => 'search404_page',
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'type' => MENU_LOCAL_TASK
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);
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$items['admin/settings/search404'] = array(
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'title' => t('Search 404 settings'),
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'description' => t('Administer search 404.'),
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'page callback' => 'drupal_get_form',
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'page arguments' => array('search404_settings'),
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'access callback' => 'user_access',
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'access arguments' => array('administer site configuration'),
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'type' => MENU_NORMAL_ITEM,
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);
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return $items;
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}
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/**
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* Replacement for search_get_keys
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* WARNING: This function can potentially return dangerous
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* potential SQL inject/XSS
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* data. Return must be sanatized before use.
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*/
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function search404_get_keys() {
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// Abort query on certain extensions, e.g: gif jpg jpeg png
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$extensions = preg_split('/\s+/', variable_get('search404_ignore_query', 'gif jpg jpeg bmp png'));
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$extensions = trim(implode('|', $extensions));
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if (!empty($extensions) && preg_match("/\.($extensions)$/", $_REQUEST['destination'])) {
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return false;
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}
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$keys = $_REQUEST['destination'];
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$misc_var = variable_get('search404_regex', '');
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if (!empty($misc_var)) {
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$keys = preg_grep($misc_var, $keys);
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$keys = $keys[0];
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}
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// Ingore certain extensions from query
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$extensions = preg_split('/\s+/', variable_get('search404_ignore_extensions', 'htm html php'));
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$extensions = trim(implode('|', $extensions));
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if (!empty($extensions)) {
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$keys = preg_replace("/\.($extensions)$/", '', $keys);
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}
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$keys = preg_split('/['. PREG_CLASS_SEARCH_EXCLUDE .']+/u', $keys);
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// Ignore certain words
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$keys = array_diff($keys, explode(' ', variable_get('search404_ignore', 'and or the')));
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//Sanitize the keys
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foreach ($keys as $a => $b) {
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$keys[$a] = check_plain($b);
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}
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$modifier = variable_get('search404_use_or', false) ? ' OR ' : ' ';
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$keys = trim(implode($modifier, $keys));
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return $keys;
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}
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/**
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* Detect search from search engine (BETA)
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*/
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function search404_search_engine_query() {
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$engines = array(
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'altavista' => 'q',
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'aol' => 'query',
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'google' => 'q',
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'live' => 'q',
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'lycos' => 'query',
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'msn' => 'q',
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'yahoo' => 'p',
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);
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$parsed_url = parse_url($_SERVER['HTTP_REFERER']);
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$remote_host = $parsed_url['host'];
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$query_string = $parsed_url['query'];
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parse_str($query_string, $query);
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if (!$parsed_url === false && !empty($remote_host) && !empty($query_string) && count($query)) {
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foreach ($engines as $host => $key) {
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if (strpos($remote_host, $host) !== false && array_key_exists($key, $query)) {
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return trim($query[$key]);
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}
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}
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}
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return false;
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}
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/**
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* Main search function.
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* Started with: http://drupal.org/node/12668
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* Updated to be more similar to search_view
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* Beware of messy code
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*/
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function search404_page() {
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$output = '<p>'. t('The page you requested was not found.') .'</p>';
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if (module_exists('search') && user_access('search content')) {
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$keys = "";
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if (variable_get('search404_use_search_engine', false)) {
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$keys = search404_search_engine_query();
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}
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if (!$keys) {
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$keys = search404_get_keys();
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}
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if ($keys) {
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// TODO: watchdog?
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$results = module_invoke('node', 'search', 'search', $keys);
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if (isset($results) && is_array($results) && count($results) == 1 && variable_get('search404_jump', false)) {
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// First, check to see if there is exactly 1 result
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drupal_set_message(t('The page you requested does not exist. A search for %keys resulted in this page.', array('%keys' => check_plain($keys))), 'status');
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// overwrite $_REQUEST['destination'] because it is set by drupal_not_found()
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$_REQUEST['destination'] = 'node/'. $results[0]['node']->nid;
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drupal_goto();
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}
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elseif (isset($results) && is_array($results) && count($results) > 1 && variable_get('search404_first', false)) {
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drupal_set_message(t('The page you requested does not exist. A search for %keys resulted in this page.', array('%keys' => check_plain($keys))), 'status');
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// overwrite $_REQUEST['destination'] because it is set by drupal_not_found()
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$_REQUEST['destination'] = 'node/'. $results[0]['node']->nid;
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drupal_goto();
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}
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else {
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drupal_set_message(t('The page you requested does not exist. For your convenience, a search was performed using the query %keys.', array('%keys' => check_plain($keys))), 'error');
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if (isset($results) && is_array($results) && count($results) > 0) {drupal_set_message('Inside Else1');
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drupal_add_css(drupal_get_path('module', 'search') .'/search.css', 'module', 'all', FALSE);
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// EVIL HAXX!
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$oldgetq = $_GET['q'];
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$olddestination = $_REQUEST['destination'];
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unset($_REQUEST['destination']);
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$_GET['q'] = "search/node/$keys";
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$results = theme('search_results', $results, 'node');
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$_GET['q'] = $oldgetq;
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$_REQUEST['destination'] = $olddestination;
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// END OF EVIL HAXX!
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}
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else {
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$results = search_help('search#noresults', drupal_help_arg());
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}
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$results = theme('box', t('Search results'), $results);
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}
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}
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// Construct the search form.
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$output .= drupal_get_form('search_form', NULL, $keys, 'node');
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$output .= $results;
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}
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return $output;
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}
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/**
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* Search404 administration settings
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*/
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function search404_settings() {
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$form['search404_jump'] = array(
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'#type' => 'checkbox',
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'#title' => t('Jump directly to the search result when there is only one result.'),
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'#default_value' => variable_get('search404_jump', false),
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);
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$form['search404_first'] = array(
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'#type' => 'checkbox',
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'#title' => t('Jump directly to the first search result when there are multiple results.'),
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'#default_value' => variable_get('search404_first', false),
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);
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$form['advanced'] = array(
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'#type' => 'fieldset',
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'#title' => t('Advanced settings'),
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'#description' => t("WARNING. Some of these settings can mess up stuff, don't touch unless you know what you are
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doing."),
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'#collapsible' => TRUE,
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'#collapsed' => TRUE,
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);
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$form['advanced']['search404_use_or'] = array(
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'#type' => 'checkbox',
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'#title' => t('Use OR between keywords when searching.'),
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'#default_value' => variable_get('search404_use_or', false),
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);
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$form['advanced']['search404_use_search_engine'] = array(
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'#type' => 'checkbox',
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'#title' => t('Use auto-detection of keywords from search engine referer. BETA! Not for production sites, use at your own risk.'),
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'#default_value' => variable_get('search404_use_search_engine', false),
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);
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$form['advanced']['search404_ignore'] = array(
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'#type' => 'textfield',
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'#title' => t('Words to ignore'),
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'#description' => t('These words will be ignored from query. Separate words with a space, e.g.: "and or the".'),
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'#default_value' => variable_get('search404_ignore', 'and or the'),
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);
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$form['advanced']['search404_ignore_extensions'] = array(
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'#type' => 'textfield',
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'#title' => t('Extensions to ignore'),
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'#description' => t('These extensions will be ignored from query. Separate extensions with a space, e.g.: "htm html php". Do not include leading dot.'),
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'#default_value' => variable_get('search404_ignore_extensions', 'htm html php'),
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);
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$form['advanced']['search404_ignore_query'] = array(
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'#type' => 'textfield',
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'#title' => t('Extensions to abort search'),
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'#description' => t('A search will not be performed for a query ending in the following extensions. Separate extensions with a space, e.g.: "gif jpg jpeg bmp png". Do not include leading dot.'),
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'#default_value' => variable_get('search404_ignore_query', 'gif jpg jpeg bmp png'),
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);
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$form['advanced']['search404_regex'] = array(
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'#type' => 'textfield',
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'#title' => t('PCRE REGEX'),
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'#description' => t('This regex will applied to all queries. It uses the code:<p>%code</p>Look directly at the source code to understand underlying syntax. See also <a href="http://php.net/pcre">PCRE pages in the PHP Manual</a>.', array('%code' => "\$keys = preg_grep(variable_get('search404_regex'), \$keys);\n\$keys = \$keys[0];", '%function' => 'search404_get_keys()')),
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'#default_value' => variable_get('search404_regex',''),
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);
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return system_settings_form($form);
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}
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