redirection / modules / wordpress.php

wordpress.php in Redirection 3.0.1, 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( 'send_headers', array( $this, 'send_headers' ) );
21	add_filter( 'permalink_redirect_skip', array( $this, 'permalink_redirect_skip' ) );
22	add_filter( 'wp_redirect', array( $this, 'wp_redirect' ), 1, 2 );
23	add_action( 'template_redirect', array( $this, 'template_redirect' ) );
24	//add_filter( 'status_header', array( $this, 'status_header_404' ), 10, 4 );
25	add_action( 'redirection_visit', array( $this, 'redirection_visit' ), 10, 3 );
26	add_action( 'redirection_do_nothing', array( $this, 'redirection_do_nothing' ) );
27
28	// Remove WordPress 2.3 redirection
29	remove_action( 'template_redirect', 'wp_old_slug_redirect' );
30	}
31
32	// Replacement for template_redirect to catch all 404 situations, not just template_redirect
33	public function status_header_404( $status_header, $code, $description, $protocol ) {
34	if ( $code === 404 ) {
35	$options = red_get_options();
36
37	if ( isset( $options['expire_404'] ) && $options['expire_404'] >= 0 && apply_filters( 'redirection_log_404', $this->can_log ) ) {
38	RE_404::create( Redirection_Request::get_request_url(), Redirection_Request::get_user_agent(), Redirection_Request::get_ip(), Redirection_Request::get_referrer() );
39	}
40	}
41
42	return $status_header;
43	}
44
45	public function redirection_do_nothing() {
46	$this->can_log = false;
47	return false;
48	}
49
50	public function redirection_visit( $redirect, $url, $target ) {
51	$redirect->visit( $url, $target );
52	}
53
54	public function init() {
55	$url = apply_filters( 'redirection_url_source', Redirection_Request::get_request_url() );
56
57	// Make sure we don't try and redirect something essential
58	if ( $url && ! $this->protected_url( $url ) && $this->matched === false ) {
59	do_action( 'redirection_first', $url, $this );
60
61	$redirects = Red_Item::get_for_url( $url, 'wp' );
62
63	foreach ( (array) $redirects as $item ) {
64	if ( $item->matches( $url ) ) {
65	$this->matched = $item;
66	break;
67	}
68	}
69
70	do_action( 'redirection_last', $url, $this );
71	}
72	}
73
74	/**
75	* Protect certain URLs from being redirected. Note we don't need to protect wp-admin, as this code doesn't run there
76	*/
77	private function protected_url( $url ) {
78	$rest = parse_url( get_rest_url() );
79	$rest_api = $rest['path'].( isset( $rest['query'] ) ? '?'.$rest['query'] : '' );
80
81	if ( substr( $url, 0, strlen( $rest_api ) ) === $rest_api ) {
82	// Never redirect the REST API
83	return true;
84	}
85
86	return false;
87	}
88
89	public function template_redirect() {
90	if ( is_404() ) {
91	$options = red_get_options();
92
93	if ( isset( $options['expire_404'] ) && $options['expire_404'] >= 0 && apply_filters( 'redirection_log_404', $this->can_log ) ) {
94	RE_404::create( Redirection_Request::get_request_url(), Redirection_Request::get_user_agent(), Redirection_Request::get_ip(), Redirection_Request::get_referrer() );
95	}
96	}
97	}
98
99	public function status_header( $status ) {
100	// Fix for incorrect headers sent when using FastCGI/IIS
101	if ( substr( php_sapi_name(), 0, 3 ) === 'cgi' ) {
102	return str_replace( 'HTTP/1.1', 'Status:', $status );
103	}
104
105	return $status;
106	}
107
108	public function send_headers( $obj ) {
109	if ( ! empty( $this->matched ) && $this->matched->match->action_code === '410' ) {
110	add_filter( 'status_header', array( $this, 'set_header_410' ) );
111	}
112	}
113
114	public function set_header_410() {
115	return 'HTTP/1.1 410 Gone';
116	}
117
118	public function wp_redirect( $url, $status ) {
119	global $wp_version, $is_IIS;
120
121	if ( $is_IIS ) {
122	header( "Refresh: 0;url=$url" );
123	return $url;
124	}
125
126	if ( $status === 301 && php_sapi_name() === 'cgi-fcgi' ) {
127	$servers_to_check = array( 'lighttpd', 'nginx' );
128
129	foreach ( $servers_to_check as $name ) {
130	if ( stripos( $_SERVER['SERVER_SOFTWARE'], $name ) !== false ) {
131	status_header( $status );
132	header( "Location: $url" );
133	exit( 0 );
134	}
135	}
136	}
137
138	if ( intval( $status, 10 ) === 307 ) {
139	status_header( $status );
140	nocache_headers();
141	return $url;
142	}
143
144	$options = red_get_options();
145
146	// Do we need to set the cache header?
147	if ( ! headers_sent() && isset( $options['redirect_cache'] ) && $options['redirect_cache'] !== 0 && intval( $status, 10 ) === 301 ) {
148	if ( $options['redirect_cache'] === -1 ) {
149	// No cache - just use WP function
150	nocache_headers();
151	} else {
152	// Custom cache
153	header( 'Expires: ' . gmdate( 'D, d M Y H:i:s T', time() + $options['redirect_cache'] * 60 * 60 ) );
154	header( 'Cache-Control: max-age=' . $options['redirect_cache'] * 60 * 60 );
155	}
156	}
157
158	status_header( $status );
159	return $url;
160	}
161
162	public function update( array $data ) {
163	return false;
164	}
165
166	protected function load( $options ) {
167	}
168
169	protected function flush_module() {
170	}
171
172	public function permalink_redirect_skip( $skip ) {
173	// only want this if we've matched using redirection
174	if ( $this->matched ) {
175	$skip[] = $_SERVER['REQUEST_URI'];
176	}
177
178	return $skip;
179	}
180
181	public function reset() {
182	$this->can_log = true;
183	}
184	}
185