redirection / modules / wordpress.php

wordpress.php in Redirection 4.6.2, 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	// Only run redirect rules if we're not disabled
19	if ( ! red_is_disabled() ) {
20	// The main redirect loop
21	add_action( 'init', [ $this, 'init' ] );
22
23	// Force HTTPs code
24	add_action( 'init', [ $this, 'force_https' ] );
25
26	// Send site HTTP headers as well as 410 error codes
27	add_action( 'send_headers', [ $this, 'send_headers' ] );
28
29	// Redirect HTTP headers and server-specific overrides
30	add_filter( 'wp_redirect', [ $this, 'wp_redirect' ], 1, 2 );
31	}
32
33	// Setup the various filters and actions that allow Redirection to happen
34	add_action( 'redirection_visit', [ $this, 'redirection_visit' ], 10, 3 );
35	add_action( 'redirection_do_nothing', [ $this, 'redirection_do_nothing' ] );
36
37	// Prevent WordPress overriding a canonical redirect
38	add_filter( 'redirect_canonical', [ $this, 'redirect_canonical' ], 10, 2 );
39
40	// Log 404s and perform 'URL and WordPress page type' redirects
41	add_action( 'template_redirect', [ $this, 'template_redirect' ] );
42	}
43
44	/*
45	* This ensures that a matched URL is not overriddden by WordPress, if the URL happens to be a WordPress URL of some kind
46	* For example: /?author=1 will be redirected to /author/name unless this returns false
47	*/
48	public function redirect_canonical( $redirect_url, $requested_url ) {
49	if ( $this->matched ) {
50	return false;
51	}
52
53	return $redirect_url;
54	}
55
56	public function template_redirect() {
57	if ( ! is_404() \|\| $this->matched ) {
58	return;
59	}
60
61	if ( $this->match_404_type() ) {
62	// Don't log an intentionally redirected 404
63	return;
64	}
65
66	$options = red_get_options();
67
68	if ( isset( $options['expire_404'] ) && $options['expire_404'] >= 0 && apply_filters( 'redirection_log_404', $this->can_log ) ) {
69	RE_404::create( Redirection_Request::get_request_url(), Redirection_Request::get_user_agent(), Redirection_Request::get_ip(), Redirection_Request::get_referrer() );
70	}
71	}
72
73	private function match_404_type() {
74	if ( ! property_exists( $this, 'redirects' ) \|\| count( $this->redirects ) === 0 ) {
75	return false;
76	}
77
78	$page_types = array_values( array_filter( $this->redirects, [ $this, 'only_404' ] ) );
79
80	if ( count( $page_types ) > 0 ) {
81	$url = apply_filters( 'redirection_url_source', Redirection_Request::get_request_url() );
82
83	foreach ( $page_types as $page_type ) {
84	if ( $page_type->is_match( $url ) ) {
85	return true;
86	}
87	}
88	}
89
90	return false;
91	}
92
93	private function only_404( $redirect ) {
94	return $redirect->match->get_type() === 'page';
95	}
96
97	// Return true to stop further processing of the 'do nothing'
98	public function redirection_do_nothing() {
99	$this->can_log = false;
100	return true;
101	}
102
103	public function redirection_visit( $redirect, $url, $target ) {
104	$redirect->visit( $url, $target );
105	}
106
107	public function force_https() {
108	$options = red_get_options();
109
110	if ( $options['https'] && ! is_ssl() ) {
111	$target = rtrim( parse_url( home_url(), PHP_URL_HOST ), '/' ) . esc_url_raw( Redirection_Request::get_request_url() );
112	add_filter( 'x_redirect_by', [ $this, 'x_redirect_by' ] );
113	wp_safe_redirect( 'https://' . $target, 301 );
114	die();
115	}
116	}
117
118	public function x_redirect_by() {
119	return 'redirection';
120	}
121
122	/**
123	* This is the key to Redirection and where requests are matched to redirects
124	*/
125	public function init() {
126	$url = Redirection_Request::get_request_url();
127	$url = apply_filters( 'redirection_url_source', $url );
128	$url = rawurldecode( $url );
129
130	// Make sure we don't try and redirect something essential
131	if ( $url && ! $this->protected_url( $url ) && $this->matched === false ) {
132	do_action( 'redirection_first', $url, $this );
133
134	// Get all redirects that match the URL
135	$redirects = Red_Item::get_for_url( $url );
136
137	// Redirects will be ordered by position. Run through the list until one fires
138	foreach ( (array) $redirects as $item ) {
139	if ( $item->is_match( $url ) ) {
140	$this->matched = $item;
141	break;
142	}
143	}
144
145	do_action( 'redirection_last', $url, $this );
146
147	if ( ! $this->matched ) {
148	// Keep them for later
149	$this->redirects = $redirects;
150	}
151	}
152	}
153
154	/*
155	* Protect certain URLs from being redirected. Note we don't need to protect wp-admin, as this code doesn't run there
156	*/
157	private function protected_url( $url ) {
158	$rest = wp_parse_url( red_get_rest_api() );
159	$rest_api = $rest['path'] . ( isset( $rest['query'] ) ? '?' . $rest['query'] : '' );
160
161	if ( substr( $url, 0, strlen( $rest_api ) ) === $rest_api ) {
162	// Never redirect the REST API
163	return true;
164	}
165
166	return false;
167	}
168
169	public function status_header( $status ) {
170	// Fix for incorrect headers sent when using FastCGI/IIS
171	if ( substr( php_sapi_name(), 0, 3 ) === 'cgi' ) {
172	return str_replace( 'HTTP/1.1', 'Status:', $status );
173	}
174
175	return $status;
176	}
177
178	public function send_headers( $obj ) {
179	if ( ! empty( $this->matched ) && $this->matched->action->get_code() === 410 ) {
180	add_filter( 'status_header', [ $this, 'set_header_410' ] );
181	}
182
183	// Add any custom headers
184	$options = red_get_options();
185	$headers = new Red_Http_Headers( $options['headers'] );
186	$headers->run( $headers->get_site_headers() );
187	}
188
189	public function set_header_410() {
190	return 'HTTP/1.1 410 Gone';
191	}
192
193	public function wp_redirect( $url, $status = 302 ) {
194	global $wp_version, $is_IIS;
195
196	$options = red_get_options();
197	$headers = new Red_Http_Headers( $options['headers'] );
198	$headers->run( $headers->get_redirect_headers() );
199
200	if ( $is_IIS ) {
201	header( "Refresh: 0;url=$url" );
202	return $url;
203	}
204
205	if ( $status === 301 && php_sapi_name() === 'cgi-fcgi' ) {
206	$servers_to_check = [ 'lighttpd', 'nginx' ];
207
208	foreach ( $servers_to_check as $name ) {
209	if ( isset( $_SERVER['SERVER_SOFTWARE'] ) && stripos( $_SERVER['SERVER_SOFTWARE'], $name ) !== false ) {
210	status_header( $status );
211	header( "Location: $url" );
212	exit( 0 );
213	}
214	}
215	}
216
217	if ( intval( $status, 10 ) === 307 ) {
218	status_header( $status );
219	nocache_headers();
220	return $url;
221	}
222
223	$options = red_get_options();
224
225	// Do we need to set the cache header?
226	if ( ! headers_sent() && isset( $options['redirect_cache'] ) && $options['redirect_cache'] !== 0 && intval( $status, 10 ) === 301 ) {
227	if ( $options['redirect_cache'] === -1 ) {
228	// No cache - just use WP function
229	nocache_headers();
230	} else {
231	// Custom cache
232	header( 'Expires: ' . gmdate( 'D, d M Y H:i:s T', time() + $options['redirect_cache'] * 60 * 60 ) );
233	header( 'Cache-Control: max-age=' . $options['redirect_cache'] * 60 * 60 );
234	}
235	}
236
237	status_header( $status );
238	return $url;
239	}
240
241	public function update( array $data ) {
242	return false;
243	}
244
245	protected function load( $options ) {
246	}
247
248	protected function flush_module() {
249	}
250
251	public function reset() {
252	$this->can_log = true;
253	}
254	}
255