redirection / modules / wordpress.php

wordpress.php in Redirection 3.3, 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() ) {
46	$options = red_get_options();
47
48	if ( isset( $options['expire_404'] ) && $options['expire_404'] >= 0 && apply_filters( 'redirection_log_404', $this->can_log ) ) {
49	RE_404::create( Redirection_Request::get_request_url(), Redirection_Request::get_user_agent(), Redirection_Request::get_ip(), Redirection_Request::get_referrer() );
50	}
51	}
52	}
53
54	public function redirection_do_nothing() {
55	$this->can_log = false;
56	return false;
57	}
58
59	public function redirection_visit( $redirect, $url, $target ) {
60	$redirect->visit( $url, $target );
61	}
62
63	public function force_https() {
64	$options = red_get_options();
65
66	if ( $options['https'] && ! is_ssl() ) {
67	wp_safe_redirect( 'https://' . Redirection_Request::get_server_name(), 301 );
68	die();
69	}
70	}
71
72	public function init() {
73	$url = apply_filters( 'redirection_url_source', Redirection_Request::get_request_url() );
74
75	// Make sure we don't try and redirect something essential
76	if ( $url && ! $this->protected_url( $url ) && $this->matched === false ) {
77	do_action( 'redirection_first', $url, $this );
78
79	$redirects = Red_Item::get_for_url( $url, 'wp' );
80
81	foreach ( (array) $redirects as $item ) {
82	if ( $item->matches( $url ) ) {
83	$this->matched = $item;
84	break;
85	}
86	}
87
88	do_action( 'redirection_last', $url, $this );
89	}
90	}
91
92	/**
93	* Protect certain URLs from being redirected. Note we don't need to protect wp-admin, as this code doesn't run there
94	*/
95	private function protected_url( $url ) {
96	$rest = parse_url( red_get_rest_api() );
97	$rest_api = $rest['path'] . ( isset( $rest['query'] ) ? '?' . $rest['query'] : '' );
98
99	if ( substr( $url, 0, strlen( $rest_api ) ) === $rest_api ) {
100	// Never redirect the REST API
101	return true;
102	}
103
104	return false;
105	}
106
107	public function status_header( $status ) {
108	// Fix for incorrect headers sent when using FastCGI/IIS
109	if ( substr( php_sapi_name(), 0, 3 ) === 'cgi' ) {
110	return str_replace( 'HTTP/1.1', 'Status:', $status );
111	}
112
113	return $status;
114	}
115
116	public function send_headers( $obj ) {
117	if ( ! empty( $this->matched ) && $this->matched->match->action_code === '410' ) {
118	add_filter( 'status_header', array( $this, 'set_header_410' ) );
119	}
120	}
121
122	public function set_header_410() {
123	return 'HTTP/1.1 410 Gone';
124	}
125
126	public function wp_redirect( $url, $status ) {
127	global $wp_version, $is_IIS;
128
129	if ( $is_IIS ) {
130	header( "Refresh: 0;url=$url" );
131	return $url;
132	}
133
134	if ( $status === 301 && php_sapi_name() === 'cgi-fcgi' ) {
135	$servers_to_check = array( 'lighttpd', 'nginx' );
136
137	foreach ( $servers_to_check as $name ) {
138	if ( stripos( $_SERVER['SERVER_SOFTWARE'], $name ) !== false ) {
139	status_header( $status );
140	header( "Location: $url" );
141	exit( 0 );
142	}
143	}
144	}
145
146	if ( intval( $status, 10 ) === 307 ) {
147	status_header( $status );
148	nocache_headers();
149	return $url;
150	}
151
152	$options = red_get_options();
153
154	// Do we need to set the cache header?
155	if ( ! headers_sent() && isset( $options['redirect_cache'] ) && $options['redirect_cache'] !== 0 && intval( $status, 10 ) === 301 ) {
156	if ( $options['redirect_cache'] === -1 ) {
157	// No cache - just use WP function
158	nocache_headers();
159	} else {
160	// Custom cache
161	header( 'Expires: ' . gmdate( 'D, d M Y H:i:s T', time() + $options['redirect_cache'] * 60 * 60 ) );
162	header( 'Cache-Control: max-age=' . $options['redirect_cache'] * 60 * 60 );
163	}
164	}
165
166	status_header( $status );
167	return $url;
168	}
169
170	public function update( array $data ) {
171	return false;
172	}
173
174	protected function load( $options ) {
175	}
176
177	protected function flush_module() {
178	}
179
180	public function reset() {
181	$this->can_log = true;
182	}
183	}
184