wp-410 / wp-410.php

wp-410.php in HTTP 410 (Gone) responses 0.1, at wp-410.php

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1	<?php
2	/*
3	Plugin Name: 410 for Wordpress
4	Plugin URI: http://rayofsolaris.net/code/410-for-wordpress
5	Description: Sends HTTP 410 (Gone) responses to requests for pages that no longer exist on your blog.
6	Version: 0.1
7	Author: Samir Shah
8	Author URI: http://rayofsolaris.net/
9	License: GPL2
10	Text Domain: wp-410
11	*/
12
13	if( !defined('ABSPATH') ) exit;
14
15	class WP_410 {
16	const dom = 'wp-410';
17	const link_opt = 'wp_410_links_list';
18
19	function __construct() {
20	load_plugin_textdomain( self::dom, false, dirname( plugin_basename( __FILE__ ) ) . '/languages' );
21
22	if( is_admin() ) {
23	add_action( 'admin_menu', array( &$this, 'settings_menu' ) );
24	}
25
26	add_action('delete_post', array( &$this, 'note_deleted_post' ) );
27	add_action('wp_insert_post', array( &$this, 'note_inserted_post' ) );
28	add_action('template_redirect', array( &$this, 'check_for_410' ) );
29	}
30
31	function settings_menu() {
32	add_submenu_page('plugins.php', __('410 for Wordpress', self::dom), __('410 for Wordpress', self::dom), 'manage_options', 'wp_410_settings', array(&$this, 'settings_page') );
33	}
34
35	function settings_page() {
36	// global $wp_version;
37	$old_links = get_option( self::link_opt, array() );
38
39	if ( isset( $_POST['submit'] ) ) {
40	if( !empty( $_POST['old_links_to_add'] ) ){
41	$added_links = preg_split( '/(\r?\n)+/', $_POST['old_links_to_add'], -1, PREG_SPLIT_NO_EMPTY );
42
43	foreach( $added_links as $addlink )
44	$old_links[] = esc_url_raw( $addlink, array( 'http', 'https' ) );
45	}
46
47	if( !empty( $_POST['old_links_to_remove'] ) )
48	$old_links = array_diff( $old_links, $_POST['old_links_to_remove'] );
49
50	$old_links = array_unique( $old_links );
51	sort( $old_links );
52
53	update_option( self::link_opt, $old_links );
54	echo '<div id="message" class="updated fade"><p>'.__('Options updated.', self::dom).'</p></div>';
55	}
56	?>
57	<style>
58	.indent {padding-left: 2em}
59	.wp_gone_deleted label {text-decoration: line-through}
60	</style>
61	<div class="wrap">
62	<h2><?php _e('410 for Wordpress', self::dom);?></h2>
63	<p><?php _e('This plugin will issue a HTTP 410 response to articles that no longer exist on your blog. When an article is deleted, it records the URL for that page and issues a 410 response when that URL is requested. This HTTP code informs robots visiting your site that the requested page has been permanently removed, and that they should stop trying to access it.', self::dom);?></p>
64	<p><?php _e('Note: the plugin will only return a 410 response if Wordpress has not found something valid to display for the requested URL.', self::dom);?></p>
65	<form action="" method="post" id="wp-gone-captcha-settings">
66	<h3><?php _e('Obsolete URLs', self::dom);?></h3>
67	<?php
68	if( empty( $old_links ) ) {
69	echo '<p>' . __( 'There are currently no obsolete URLs in this list. You can add some manually below.', self::dom ) . '</p>';
70	}
71	else {
72	echo '<p>' . __( 'The following URLs are currently considered obsolete. To remove items from the list, check the corresponding box.', self::dom ) .'</p>';
73	echo '<ul id="wp_gone_old_links" class="indent">';
74	foreach( $old_links as $k => $link )
75	echo "<li><input type='checkbox' name='old_links_to_remove[]' value='" . htmlspecialchars( $link ) . "' id='old_link_$k' /> <label for='old_link_$k'><code>" . htmlspecialchars( $link ). "</code></label></li>";
76	echo '</ul>';
77	}
78	?>
79	<p><small><?php _e('If you create or update an article whose URL matches one of those below, that URL will automatically be removed from this list.', self::dom);?></small></p>
80	<h3><?php _e('Manually add URLs', self::dom);?></h3>
81	<p><?php _e('You can manually add items to the list by entering them below. Please enter one <strong>fully qualified</strong> URL per line.');?></p>
82	<textarea name="old_links_to_add" rows="8" cols="80"></textarea>
83	<p class="submit"><input class="button-primary" type="submit" name="submit" value="<?php _e('Update settings', self::dom);?>" /></p>
84	</form>
85	</div>
86	<script>
87	jQuery(document).ready(function(){
88	jQuery('#wp_gone_old_links input').change( function(){
89	this.parentNode.className = jQuery(this).is(":checked") ? 'wp_gone_deleted' : '';
90	});
91	});
92	</script>
93	<?php
94	}
95
96	function note_deleted_post( $id ) {
97	// NOTE: function wp_delete_post calls the delete_post action twice
98	static $delete_noted = false;
99
100	if( $delete_noted )
101	return;
102
103	$delete_noted = true;
104
105	$links_to_410 = array(
106	get_permalink( $id ),
107	get_post_comments_feed_link ( $id )
108	);
109
110	$list = get_option( self::link_opt, array() );
111
112	foreach( $links_to_410 as $link ) if( !in_array( $link, $list ) )
113	$list[] = $link;
114
115	update_option( self::link_opt, $list );
116	}
117
118	function note_inserted_post( $id ) {
119	// Check our list of URLs against the new/updated post's permalink, and if they match, scratch it from our list
120	$links_not_to_410 = array(
121	get_permalink( $id ),
122	get_post_comments_feed_link ( $id )
123	);
124
125	$list = get_option( self::link_opt, array() );
126	foreach( $links_not_to_410 as $link ) if( $key = array_search( $link, $list ) )
127	unset( $list[$key] );
128
129	update_option( self::link_opt, $list );
130	}
131
132	function check_for_410() {
133	// Don't mess if Wordpress has found something to display
134	if( !is_404() )
135	return;
136
137	$links = get_option( self::link_opt, array() );
138	$req = ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
139
140	if( in_array( $req, $links ) ) {
141	status_header( 410 );
142	_e( 'Sorry, the page you requested has been permanently removed.', self::dom );
143	exit;
144	}
145	}
146	}
147
148	new WP_410();
149	?>
150