redirection / modules / wordpress.php

wordpress.php in Redirection 4.3.1, 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_type = array_values( array_filter( $this->redirects, array( $this, 'only_404' ) ) );
67
68	if ( count( $page_type ) > 0 ) {
69	$url = apply_filters( 'redirection_url_source', Redirection_Request::get_request_url() );
70	$first = $page_type[0];
71	return $first->is_match( $url );
72	}
73
74	return false;
75	}
76
77	private function only_404( $redirect ) {
78	return $redirect->match->get_type() === 'page';
79	}
80
81	// Return true to stop further processing of the 'do nothing'
82	public function redirection_do_nothing() {
83	$this->can_log = false;
84	return true;
85	}
86
87	public function redirection_visit( $redirect, $url, $target ) {
88	$redirect->visit( $url, $target );
89	}
90
91	public function force_https() {
92	$options = red_get_options();
93
94	if ( $options['https'] && ! is_ssl() ) {
95	$target = rtrim( parse_url( home_url(), PHP_URL_HOST ), '/' ) . esc_url_raw( Redirection_Request::get_request_url() );
96	wp_safe_redirect( 'https://' . $target, 301 );
97	die();
98	}
99	}
100
101	/**
102	* This is the key to Redirection and where requests are matched to redirects
103	*/
104	public function init() {
105	$url = Redirection_Request::get_request_url();
106	$url = apply_filters( 'redirection_url_source', urldecode( $url ) );
107
108	// Make sure we don't try and redirect something essential
109	if ( $url && ! $this->protected_url( $url ) && $this->matched === false ) {
110	do_action( 'redirection_first', $url, $this );
111
112	// Get all redirects that match the URL
113	$redirects = Red_Item::get_for_url( $url );
114
115	// Redirects will be ordered by position. Run through the list until one fires
116	foreach ( (array) $redirects as $item ) {
117	if ( $item->is_match( $url ) ) {
118	$this->matched = $item;
119	break;
120	}
121	}
122
123	do_action( 'redirection_last', $url, $this );
124
125	if ( ! $this->matched ) {
126	// Keep them for later
127	$this->redirects = $redirects;
128	}
129	}
130	}
131
132	/**
133	* Protect certain URLs from being redirected. Note we don't need to protect wp-admin, as this code doesn't run there
134	*/
135	private function protected_url( $url ) {
136	$rest = wp_parse_url( red_get_rest_api() );
137	$rest_api = $rest['path'] . ( isset( $rest['query'] ) ? '?' . $rest['query'] : '' );
138
139	if ( substr( $url, 0, strlen( $rest_api ) ) === $rest_api ) {
140	// Never redirect the REST API
141	return true;
142	}
143
144	return false;
145	}
146
147	public function status_header( $status ) {
148	// Fix for incorrect headers sent when using FastCGI/IIS
149	if ( substr( php_sapi_name(), 0, 3 ) === 'cgi' ) {
150	return str_replace( 'HTTP/1.1', 'Status:', $status );
151	}
152
153	return $status;
154	}
155
156	public function send_headers( $obj ) {
157	if ( ! empty( $this->matched ) && $this->matched->action->get_code() === 410 ) {
158	add_filter( 'status_header', array( $this, 'set_header_410' ) );
159	}
160	}
161
162	public function set_header_410() {
163	return 'HTTP/1.1 410 Gone';
164	}
165
166	public function wp_redirect( $url, $status ) {
167	global $wp_version, $is_IIS;
168
169	if ( $is_IIS ) {
170	header( "Refresh: 0;url=$url" );
171	return $url;
172	}
173
174	if ( $status === 301 && php_sapi_name() === 'cgi-fcgi' ) {
175	$servers_to_check = array( 'lighttpd', 'nginx' );
176
177	foreach ( $servers_to_check as $name ) {
178	if ( isset( $_SERVER['SERVER_SOFTWARE'] ) && stripos( $_SERVER['SERVER_SOFTWARE'], $name ) !== false ) {
179	status_header( $status );
180	header( "Location: $url" );
181	exit( 0 );
182	}
183	}
184	}
185
186	if ( intval( $status, 10 ) === 307 ) {
187	status_header( $status );
188	nocache_headers();
189	return $url;
190	}
191
192	$options = red_get_options();
193
194	// Do we need to set the cache header?
195	if ( ! headers_sent() && isset( $options['redirect_cache'] ) && $options['redirect_cache'] !== 0 && intval( $status, 10 ) === 301 ) {
196	if ( $options['redirect_cache'] === -1 ) {
197	// No cache - just use WP function
198	nocache_headers();
199	} else {
200	// Custom cache
201	header( 'Expires: ' . gmdate( 'D, d M Y H:i:s T', time() + $options['redirect_cache'] * 60 * 60 ) );
202	header( 'Cache-Control: max-age=' . $options['redirect_cache'] * 60 * 60 );
203	}
204	}
205
206	status_header( $status );
207	return $url;
208	}
209
210	public function update( array $data ) {
211	return false;
212	}
213
214	protected function load( $options ) {
215	}
216
217	protected function flush_module() {
218	}
219
220	public function reset() {
221	$this->can_log = true;
222	}
223	}
224