redirection / modules / wordpress.php

wordpress.php in Redirection 3.5, 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	$target = rtrim( Redirection_Request::get_server_name(), '/' ) . esc_url_raw( Redirection_Request::get_request_url() );
68	wp_safe_redirect( 'https://' . $target, 301 );
69	die();
70	}
71	}
72
73	public function init() {
74	$url = apply_filters( 'redirection_url_source', Redirection_Request::get_request_url() );
75
76	// Make sure we don't try and redirect something essential
77	if ( $url && ! $this->protected_url( $url ) && $this->matched === false ) {
78	do_action( 'redirection_first', $url, $this );
79
80	$redirects = Red_Item::get_for_url( $url, 'wp' );
81
82	foreach ( (array) $redirects as $item ) {
83	if ( $item->matches( $url ) ) {
84	$this->matched = $item;
85	break;
86	}
87	}
88
89	do_action( 'redirection_last', $url, $this );
90	}
91	}
92
93	/**
94	* Protect certain URLs from being redirected. Note we don't need to protect wp-admin, as this code doesn't run there
95	*/
96	private function protected_url( $url ) {
97	$rest = parse_url( red_get_rest_api() );
98	$rest_api = $rest['path'] . ( isset( $rest['query'] ) ? '?' . $rest['query'] : '' );
99
100	if ( substr( $url, 0, strlen( $rest_api ) ) === $rest_api ) {
101	// Never redirect the REST API
102	return true;
103	}
104
105	return false;
106	}
107
108	public function status_header( $status ) {
109	// Fix for incorrect headers sent when using FastCGI/IIS
110	if ( substr( php_sapi_name(), 0, 3 ) === 'cgi' ) {
111	return str_replace( 'HTTP/1.1', 'Status:', $status );
112	}
113
114	return $status;
115	}
116
117	public function send_headers( $obj ) {
118	if ( ! empty( $this->matched ) && $this->matched->match->action_code === '410' ) {
119	add_filter( 'status_header', array( $this, 'set_header_410' ) );
120	}
121	}
122
123	public function set_header_410() {
124	return 'HTTP/1.1 410 Gone';
125	}
126
127	public function wp_redirect( $url, $status ) {
128	global $wp_version, $is_IIS;
129
130	if ( $is_IIS ) {
131	header( "Refresh: 0;url=$url" );
132	return $url;
133	}
134
135	if ( $status === 301 && php_sapi_name() === 'cgi-fcgi' ) {
136	$servers_to_check = array( 'lighttpd', 'nginx' );
137
138	foreach ( $servers_to_check as $name ) {
139	if ( stripos( $_SERVER['SERVER_SOFTWARE'], $name ) !== false ) {
140	status_header( $status );
141	header( "Location: $url" );
142	exit( 0 );
143	}
144	}
145	}
146
147	if ( intval( $status, 10 ) === 307 ) {
148	status_header( $status );
149	nocache_headers();
150	return $url;
151	}
152
153	$options = red_get_options();
154
155	// Do we need to set the cache header?
156	if ( ! headers_sent() && isset( $options['redirect_cache'] ) && $options['redirect_cache'] !== 0 && intval( $status, 10 ) === 301 ) {
157	if ( $options['redirect_cache'] === -1 ) {
158	// No cache - just use WP function
159	nocache_headers();
160	} else {
161	// Custom cache
162	header( 'Expires: ' . gmdate( 'D, d M Y H:i:s T', time() + $options['redirect_cache'] * 60 * 60 ) );
163	header( 'Cache-Control: max-age=' . $options['redirect_cache'] * 60 * 60 );
164	}
165	}
166
167	status_header( $status );
168	return $url;
169	}
170
171	public function update( array $data ) {
172	return false;
173	}
174
175	protected function load( $options ) {
176	}
177
178	protected function flush_module() {
179	}
180
181	public function reset() {
182	$this->can_log = true;
183	}
184	}
185