redirection / modules / wordpress.php

wordpress.php in Redirection 4.4.2, at modules/wordpress.php

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1	<?php
2
3	class WordPress_Module extends Red_Module {
4	const MODULE_ID = 1;
5
6	private $matched = false;
7	private $can_log = true;
8
9	public function get_id() {
10	return self::MODULE_ID;
11	}
12
13	public function get_name() {
14	return 'WordPress';
15	}
16
17	public function start() {
18	// Setup the various filters and actions that allow Redirection to happen
19	add_action( 'init', array( $this, 'init' ) );
20	add_action( 'init', array( $this, 'force_https' ) );
21	add_action( 'send_headers', array( $this, 'send_headers' ) );
22	add_filter( 'wp_redirect', array( $this, 'wp_redirect' ), 1, 2 );
23	add_action( 'redirection_visit', array( $this, 'redirection_visit' ), 10, 3 );
24	add_action( 'redirection_do_nothing', array( $this, 'redirection_do_nothing' ) );
25	add_filter( 'redirect_canonical', array( $this, 'redirect_canonical' ), 10, 2 );
26	add_action( 'template_redirect', array( $this, 'template_redirect' ) );
27
28	// Remove WordPress 2.3 redirection
29	remove_action( 'template_redirect', 'wp_old_slug_redirect' );
30	}
31
32	/**
33	* This ensures that a matched URL is not overriddden by WordPress, if the URL happens to be a WordPress URL of some kind
34	* For example: /?author=1 will be redirected to /author/name unless this returns false
35	*/
36	public function redirect_canonical( $redirect_url, $requested_url ) {
37	if ( $this->matched ) {
38	return false;
39	}
40
41	return $redirect_url;
42	}
43
44	public function template_redirect() {
45	if ( ! is_404() \|\| $this->matched ) {
46	return;
47	}
48
49	if ( $this->match_404_type() ) {
50	// Don't log an intentionally redirected 404
51	return;
52	}
53
54	$options = red_get_options();
55
56	if ( isset( $options['expire_404'] ) && $options['expire_404'] >= 0 && apply_filters( 'redirection_log_404', $this->can_log ) ) {
57	RE_404::create( Redirection_Request::get_request_url(), Redirection_Request::get_user_agent(), Redirection_Request::get_ip(), Redirection_Request::get_referrer() );
58	}
59	}
60
61	private function match_404_type() {
62	if ( ! property_exists( $this, 'redirects' ) \|\| count( $this->redirects ) === 0 ) {
63	return false;
64	}
65
66	$page_types = array_values( array_filter( $this->redirects, [ $this, 'only_404' ] ) );
67
68	if ( count( $page_types ) > 0 ) {
69	$url = apply_filters( 'redirection_url_source', Redirection_Request::get_request_url() );
70
71	foreach ( $page_types as $page_type ) {
72	if ( $page_type->is_match( $url ) ) {
73	return true;
74	}
75	}
76	}
77
78	return false;
79	}
80
81	private function only_404( $redirect ) {
82	return $redirect->match->get_type() === 'page';
83	}
84
85	// Return true to stop further processing of the 'do nothing'
86	public function redirection_do_nothing() {
87	$this->can_log = false;
88	return true;
89	}
90
91	public function redirection_visit( $redirect, $url, $target ) {
92	$redirect->visit( $url, $target );
93	}
94
95	public function force_https() {
96	$options = red_get_options();
97
98	if ( $options['https'] && ! is_ssl() ) {
99	$target = rtrim( parse_url( home_url(), PHP_URL_HOST ), '/' ) . esc_url_raw( Redirection_Request::get_request_url() );
100	wp_safe_redirect( 'https://' . $target, 301 );
101	die();
102	}
103	}
104
105	/**
106	* This is the key to Redirection and where requests are matched to redirects
107	*/
108	public function init() {
109	$url = Redirection_Request::get_request_url();
110	$url = apply_filters( 'redirection_url_source', $url );
111	$url = rawurldecode( $url );
112
113	// Make sure we don't try and redirect something essential
114	if ( $url && ! $this->protected_url( $url ) && $this->matched === false ) {
115	do_action( 'redirection_first', $url, $this );
116
117	// Get all redirects that match the URL
118	$redirects = Red_Item::get_for_url( $url );
119
120	// Redirects will be ordered by position. Run through the list until one fires
121	foreach ( (array) $redirects as $item ) {
122	if ( $item->is_match( $url ) ) {
123	$this->matched = $item;
124	break;
125	}
126	}
127
128	do_action( 'redirection_last', $url, $this );
129
130	if ( ! $this->matched ) {
131	// Keep them for later
132	$this->redirects = $redirects;
133	}
134	}
135	}
136
137	/**
138	* Protect certain URLs from being redirected. Note we don't need to protect wp-admin, as this code doesn't run there
139	*/
140	private function protected_url( $url ) {
141	$rest = wp_parse_url( red_get_rest_api() );
142	$rest_api = $rest['path'] . ( isset( $rest['query'] ) ? '?' . $rest['query'] : '' );
143
144	if ( substr( $url, 0, strlen( $rest_api ) ) === $rest_api ) {
145	// Never redirect the REST API
146	return true;
147	}
148
149	return false;
150	}
151
152	public function status_header( $status ) {
153	// Fix for incorrect headers sent when using FastCGI/IIS
154	if ( substr( php_sapi_name(), 0, 3 ) === 'cgi' ) {
155	return str_replace( 'HTTP/1.1', 'Status:', $status );
156	}
157
158	return $status;
159	}
160
161	public function send_headers( $obj ) {
162	if ( ! empty( $this->matched ) && $this->matched->action->get_code() === 410 ) {
163	add_filter( 'status_header', array( $this, 'set_header_410' ) );
164	}
165	}
166
167	public function set_header_410() {
168	return 'HTTP/1.1 410 Gone';
169	}
170
171	public function wp_redirect( $url, $status ) {
172	global $wp_version, $is_IIS;
173
174	if ( $is_IIS ) {
175	header( "Refresh: 0;url=$url" );
176	return $url;
177	}
178
179	if ( $status === 301 && php_sapi_name() === 'cgi-fcgi' ) {
180	$servers_to_check = array( 'lighttpd', 'nginx' );
181
182	foreach ( $servers_to_check as $name ) {
183	if ( isset( $_SERVER['SERVER_SOFTWARE'] ) && stripos( $_SERVER['SERVER_SOFTWARE'], $name ) !== false ) {
184	status_header( $status );
185	header( "Location: $url" );
186	exit( 0 );
187	}
188	}
189	}
190
191	if ( intval( $status, 10 ) === 307 ) {
192	status_header( $status );
193	nocache_headers();
194	return $url;
195	}
196
197	$options = red_get_options();
198
199	// Do we need to set the cache header?
200	if ( ! headers_sent() && isset( $options['redirect_cache'] ) && $options['redirect_cache'] !== 0 && intval( $status, 10 ) === 301 ) {
201	if ( $options['redirect_cache'] === -1 ) {
202	// No cache - just use WP function
203	nocache_headers();
204	} else {
205	// Custom cache
206	header( 'Expires: ' . gmdate( 'D, d M Y H:i:s T', time() + $options['redirect_cache'] * 60 * 60 ) );
207	header( 'Cache-Control: max-age=' . $options['redirect_cache'] * 60 * 60 );
208	}
209	}
210
211	status_header( $status );
212	return $url;
213	}
214
215	public function update( array $data ) {
216	return false;
217	}
218
219	protected function load( $options ) {
220	}
221
222	protected function flush_module() {
223	}
224
225	public function reset() {
226	$this->can_log = true;
227	}
228	}
229